US2690829A - Typewriter line indicator attachment - Google Patents

Description

Oct. 5, 1954 A. M. SCHLICK TYPEWRITER LINE INDICATOR ATTACHMENT 2 Sheets-Sheet 1 Filed Oct. 2, 1950 ALBERT M SCHL/CK INVENTOR.

ATTORNEY Oct. 5, 1954 A. M. SCHLICK TYPEWRITER LINE INDICATOR ATTACHMENT 2 Sheets-Sheet 2 Filed Oct. 2, 1950 mm. NW no on INVENTOR.

ATTORNEY :L Fiuxm O 55; 1 I l M ALBERT M. SCHL/CK MN EN U N5 Patented Oct. 5, 1954 U [TED STAT TYPEWRITER LINE INDICATOR ATTACHMENT 14 Claims. 1

This invention relates to typewriters, or other forms of writing machines, in which a cylinder, or platen, is used to support the paper during the process of typewriting. It is particularly applicable to typewriting machines, in which a long bar pivotally supported at its ends, is mounted above the cylinder of the machine, a plurality of rollers or other clamping means being slidably mounted on the bar to press the paper against the cylinder during the process of writing.

It is primarily directed to a device which may be attached to a typewriter in removable engagement with the cylinder to: indicate the number of lines which have been written or spaced, from the top of a sheet, or other starting point.

In operating a typewriter it is diflicult for the operator to gage the position of the typewritten lines, with relation to the bottom of the page, after the paper is fed along the cylinder, during the process of typing. This is particularly true, where an original and four or more copies, with a sheet of carbon paper interposed between adiacent copies, are fed on the cylinder of the machine.

In order to accurately gage the position of a line, with relation to the bottom of a sheet, to avoid overrunning the sheet, or to maintain a uniform margin at the bottom of a sheet, it is necessary for the operator to rotate the platen, with the sheets mounted thereon, until the bottom of the sheet is visible, and restore the paper to its original position.

Where a plurality of carbon copies are being simultaneously typewritten, this frequently causes a disturbance of the alignment between the original and the copies, as well as the carbon paper inserts, with the result that very often lines overrun one another on the copies, or where the carbon paper is out of position, entire lines are omitted from one or more copies.

In order to correct this condition, it is necessary for the operator to remove the entire set of sheets from the cylinder, straighten and align the copies and the carbon paper inserts with the original, and replace them on the cylinder. This again necessitates the accurate adjustment of the position of the lines with relation to the position of the type bars in the writing position, and replacing the pawl on the ratchet which normally controls the line spacing of the platen.

In order to avoid this condition, I have invented an attachment, which may be mounted on the roller support bar, above the cylinder, to engage the paper during the rotation of the cylinder, and to indicate the position of the typewritten lines, with relation to the starting point, or the top of the sheet, in order to locate the bottom lines, with relation to the bottom of the sheet.

By varying the scale of the indicator, or utilizing a plurality of scales simultaneously, the same unit may be applied with equal facility to letterheads of the conventional size, forms and billheads of reduced overall length, legal forms and sheets, as well as mimeograph and other types of sheets, or for the cutting of mimograph stenoils.

The unit may also be utilized for filling out legal, or other types of forms, where it is necessary to accurately position typewritten lines with relation to the form, particularly where portions of the form may be covered by the typewriter mechanism.

The object of my invention is to provide an attachment for a typewriter, which will indicate the position of each typewritten line with relation to the starting point, or the top of the sheet.

A further object is to provide an attachment which may be mounted on a typewriter, by persons without special skills, and without the use of special tools or equipment.

Another object is to provide an attachment, the indicator scale of which is clearly visible to the operator in the normal writing position.

Another object is to provide a unit which may be left in an inoperative position when desired by the operator, without disturbing the operation of the machine or the position of the paper with relation to the cylinder.

A primary object is to provide a device which may be used interchangeably on a wide range of sheet lengths and sizes without special adjustment.

Another object is to provide a unit, the starting position of which can be readily adjusted by the operator, in a minimum of time, and without special skills or tools.

A fundamental object is to provide an attachment in which the parts are readily interchangeable, easily assembled and fitted, and in which the individual parts can be produced at relatively low cost, are accurately made, and capable of maintaining their accuracy and adjustment, over sustained periods, without requiring special tools and skills.

The accompanying drawings, illustrative of one embodiment of my invention, and a modification thereof, together with the description of their construction and method of installation, operation, and utilization thereof, will serve to clarify further objects and advantages of my invention.

In the drawings:

Fig. 1 represents a front elevation of the cylinder of a typewriting machine, with a roller bar mounted above the cylinder, showing the line indicator attachment mounted on the roller support bar.

Fig. 2 is a side elevation of the cylinder, shown in Fig. 1, and the levers pivotally supporting the roller bar, with the line indicator attachment, mounted on the bar.

Fig. 3 is a front elevation of one embodiment of the line indicator attachment, shown in Figs. 1 and 2, taken at 33, Fig. 2.

Fig. 4 is a plan View of the line indicator attachment of Figs. 1 and 3, taken at 4-4, Fig. 2.

Fig. 5 is a section through the control roller, the indicator slide, and the slide control knob, taken at 5-5, Fig. 3.

Fig. 6 is a cross-section through the control roller, and the groove follower ball, taken at 6-45, Fig. 3.

Fig. '7 represents an enlarged plan view of the scale and graduations of the indicator attachment, shown in Figs. 1 and 4.

Fig. 8 is a partial front elevation and partial longitudinal section, through a modification of the indicator, shown in Figs. 1 and 3.

Fig. 9 is a plan view of the modified indicator attachment, shown in Fig. 8.

Fig. 10 is a longitudinal section through the indicator slide of Fig. 9, and the slide stop, taken at Ill-40, Fig. 9.

Fig. 11 is a cross-section through the spiral roller, the indicator slide, and a side elevation of the slide control follower ball, taken at I |--l I, Fig. 10.

Fig. 12 is a partial front elevation and a partial vertical section through a modification of the roller, shown in Fig. 8.

It will be understood that the following description of the construction, installation and operation of the typewriter line indicator attachment, is intended as explanatory of the invention and not restrictive thereof.

In the drawings, the same reference numerals designate the same parts throughout the various views, except where otherwise indicated.

The line indicator attachment may be mounted on the conventional type of typewriting machine, a portion of which is shown in Figs. 1 and 2.

In the machine shown in Figs. 1 and 2, a cylinder or platen [0, comprising essentially a rubber covered cylinder, around which the paper H is wrapped, may be rotatably supported on the side frame members E2, of the machine, by a central shaft l4, trunnioned in the frame members.

A ratchet and pawl mechanism (not shown) is usually mounted on the shaft of the cylinder, to rotate the cylinder through an angle equivalent to one or more circumferential line spaces, when the end of a line is reached, the number of spaces being controlled by an adjusting lever (not shown), mounted at one end of the cylinder. The cylinder may also be manually rotated by a knurled knob [5, attached to one or both ends of the cylinder shaft.

A long bar l6, of circular or other suitable cross-section, or of circular cross-section, having one or more flat faces formed at the sides thereof, may be mounted above the cylinder, and substantially parallel thereto, a plurality of guide rollers 11, which press against the paper to retain the paper in contact with the surface of the cylinder during the typewriting operation, being slidably and rotatably mounted on the bar.

The bar may be supported by a pair of levers l8, attached to the ends thereof, the opposite ends of the levers being pivotally attached to the typewriter frame, by a pair of screws l9, or other suitable attaching means, to enable the bar to be lifted out of engagement with the cylinder. One or more tension springs (not shown) may be provided to retain the bar in the position shown in Figs. 1 and 2, with the guide rollers H in contact with the paper.

The line indicator attachment, shown in greater detail in Figs. 3 and 4, may be mounted on the bar IS, in substantially the position shown in Fig. 2.

One embodiment of the indicator attachment, shown in Figs. 3 and 4, comprises a frame 20, consisting of a substantially horizontal scale section 2 I, with two flanges 22 formed integral with the ends thereof, and depending therefrom, fitted to the bar iii. A pair of collars 23, may be mounted on the bar, abutting the outer ends of the flanges 22, a set screw 24, or other suitable locking means, being threadably inserted in each of the collars 23, to clamp each collar against the bar, abutting the corresponding frame flange, thereby laterally locating the frame, at any suitable position along the bar.

A long sleeve 21, having a continuous spiral groove 28, formed around the outer circumference thereof, may be mounted on the bar l6, between the two flangs 22, the sleeve being clamped between the two flanges 22 and 22a by the collars 23, or one or more set screws 29, may be threadably inserted in the sleeve, adjacent one or both ends thereof, to clamp the sleeve against the bar in the desired longitudinal position.

A slide control roller 30, of substantially tubular form, may be rotatably mounted on the outer diameter of the sleeve 21, a ball follower 3|, slidably fitted into an opening formed in the roller, fitting into the spiral groove 28, of substantially semi-circular, or other suitable cross-section, formed around the outer circumference of the sleeve, as indicated in Fig. 6. A headless lock screw 32, may be threadably inserted in the opening formed in the sleeve, to retain the ball follower 3l, within the spiral groove, while the sleeve is rotated.

In place of a separat ball 3!, and a lock screw 32, shown in Fig. 6, a hemispherical or other suitable form of tip, corresponding with the crosssectional contour of the spiral groove, may be formed integral with the screw 32, to form a onepiece follower, similar to that shown in Fig. 5.

A pair of friction bands 33, made of a rubber composition or other suitable material, may be fitted into a pair of parallel grooves formed in the outer circumference of the roller 30, the outer circumference of the bands 33 being in continuous contact with the surface of the paper, wrapped around the cylinder, to transmit the circumferential movement of the cylinder to the friction bands, thereby rotating the roller on which the bands are mounted.

The outer diameter of the friction bands 33 would be slightly greater than that of the guide rollers l1, mounted on the bar, to assure positive contact of the bands against the paper, located on the typewriter cylinder, at all times. A circumferential groove 36, of semi-circular or other suitable cross-section, may be formed around the outer circumference of the roller 30, a follower 31, the tip of which follows the crosssectional contour of the groove 36, being fitted to the groove.

The opposite end of the follower 31 may be attached to an indicator slide 38, made of Lucite, or other suitable transparent plastic material, which is slidably fitted to the indicator scale section of the frame, above the graduations thereof, by means of a screw 39, threadably inserted in the body all, of the follower 31, or by other suitable attaching means.

A long parallel-faced slot 42, may be cut through the scale section of the frame, as indicated in Fig. 4, a parallel-faced projection d3, formed integral with the upper end of the body 40, of the follower 37, being slidably fitted to the slot 42, as indicated in section, Fig. 5, to guide the follower and the indicator slide in a direction parallel to the roller and sleeve axis.

The indicator slide 38 comprises a substantially rectangular, or other suitable form of face 44, a pair of substantially perpendicular flanges 45, depending from and formed integral with the opposite ends of the face 44, engaging the sides of the scale section 2! of the frame, to guide the slide along a direction parallel to the scale section.

A continuous or broken hairline 45, may be engraved or otherwise formed in the upper surface of the face of the slide, in substantially the center thereof, the hairline being substantially parallel to the graduations formed on the surface of the scale section of the frame, to indicate the position of the slide, with relation to the scale graduations.

Lines of equally spaced graduations may be engraved, etched, or otherwise formed on the upper surface of the scale, one line of graduations being formed on each solid area 48 and fia, of the scale, adjacent the slot 42, formed in the center thereof.

The spacing of the individual graduations 49, would be equivalent to the longitudinal movement of the roller 30, along the spiral groove 28, formed in the sleeve, as a result of the angular movement of the friction bands, caused by the angular movement of the typewriter cylinder it, through the spacing of one typewritten line.

Multiple space graduations 56, may be formed at each set of individual graduations, in multiples of live, or any other desired grouping, to indicate the angular movement of the cylinder through five, or any other desired number of line spaces.

Figures 5! may be engraved, or etched, on the surface of the scale section, in alignment with the corresponding multiple space graduations, to identify and indicate the number of line spaces traversed by the indicator slide from the nominal starting point 52, which is located in correspondence with the position of the top of the sheet mounted on the cylinder, regardless of the length of the sheet.

A stop collar 51.. may be slidably mounted on the sleeve 21, between the flange of the frame and the roller 30, an adjusting screw 55, threadably inserted in the collar 54, engaging the outer circumference of the sleeve 21 to lock the collar in place, thereby limiting the movement of the roller in one direction, and locating the starting position of the roller 30, and the indicator slide.

This stop collar would be adjusted to the normal starting position of the typewriting on a page, such as the end of the printed heading on a printed letterhead, or the normal upper margin on legal documents or sheets, the operator tightening the adjusting screw 55, to retain the collar 54 in the same starting position, while a number of sheets on the same form, or type of paper are typewritten.

In order to identify the scale, corresponding to a particular length of sheet, word designations 56, such as Legal, Letter or Mimeo, may be engraved, etched, or otherwise indicated on the surface of the scale, adjacent the corresponding graduations.

A circumferential groove 5'1, the cross-section of which is substantially the same as that of the spiral groove 28, may be formed in the outer circumference of the sleeve 21, near the righthand frame flange 22a, the groove 51 being in direct communication with the end of the spiral groove 28, to enable the ball follower 3| to pass from the spiral groove into the circumferential groove 5?, when the roller 30 has reached the end of its longitudinal travel.

When the ball follower 3i engages the circumferential groove 57, in the position shown by dot-dash lines, Fig. 3, the roller 39 is rotated freely while the friction bands are in engagement with the outer circumference of the cylinder, or with the paper, mounted thereon, the roller 30 and the indicator slide 38, attached thereto, remaining in the same longitudinal position while the typewriting continues.

This enables the operator, by continuing the typewriting, until the follower ball, mounted in the roller, reaches the circumferential groove 51, to operate the machine in the normal manner, the indicator attachment being inoperative during that period, until the roller 39 is manually restored to its starting position, abutting the collar E l, by the operator.

As indicated in the scale drawing, Fig. 7, the multiple space graduations would be continued to correspond with the normal length of the corresponding sheet on each scale, with additional individual graduations 58, formed beyond the end of the last multiple space graduation.

Thus the upper scale it, Fig. '7, which is set for legal sheets, shows multiple space graduations ending at 75, and one or more individual graduations, beyond the 75, to correspond with the number of typewritten line spaces on a conventional legal sheet.

Where mimeograph paper, or similar sheets, which are longer than the conventional legal sheet, are used, the multiple space graduations would be continued until approximately 85, the individual graduations continuing beyond it, if necessary, until the end of the longer sheet is reached.

On the lower, or letter size scale lfia, the multiple space graduations 59, would continue until approximately 65 line spaces are reached, which is the normal number of typewriter line spaces. on the conventional letter size sheet.

Where longer or shorter letter sheets are used, as in social stationery, typewritten forms, or special sheets, the multiple space graduations may be extended beyond those shown in Fig. 7, or reduced therefrom, the actual end of the graduaticns depending upon the length of the sheet, for which the line indicator is adjusted.

Where conventional letter and legal size sheets are used, the individual graduations iii may be continued along the entire scale, or they may be omitted in the center section, the multiple space graduations continuing over the entire length of the scale, as indicated in Fig. 1, to enable the operator to determine individual lines at the top and bottom of a sheet, and also determine the approximate position of any intermediate portion of the typing, by means of the multiple space graduations.

Where provision is made for short letterheads, such as one-half size sheets, billheads, or other sheet lengths, shorter than the conventional letter head, the individual graduations may be continued over the entire scale, in the lower or letter scale 48a, or individual graduations may be formed in the central section, at approximately the position of the end of a half-size sheet, the multiple space graduations continuing along the entire scale.

Figs. 8 and 9 show a modification of the time indicator attachment, shown in Figs. 3 and 4. The unit may be mounted on the roller support bar It, of the machine, in substantially the same manner as that shown in Figs. 1 and 2.

The frame of the unit shown in Figs. 8 and 9, comprises a flat top or scale section 58, with a pair of flanges 59, formed integral with the end thereof, and depending therefrom, an opening formed in each of the flanges 59, being slidably fitted to the bar IS. The scale section is substantially the same as that shown in Fig. 4, except that the central slot 42, may be omitted. The height of the flanges 59 would be altered to suit the diameter of the roller 60, slidably mounted on the bar, between the flanges 59, and the construction of the indicator slide BI, and the groove follower which controls its movement.

The tubular roller 60, made of a plastic material, hard rubber, a light metal bar, or other suitable material, may be rotatably mounted on the bar [6, between the frame flanges, in substantially the same manner as the sleeve 21, shown in Fig. 3. The roller may have a set of lands 62, formed integral therewith, around the central opening, enlarged diameter recesses 63 being formed between the lands, or a larger diameter straight hole may be formed in the roller, a plurality of tubular bushings, made of an anti-friction material, being inserted in the opening in place of the lands 62.

A single spiral groove 64, of substantially semicircular cross-section, may be cut into the outer circumference of the roller 60, as indicated in Fig. 8, in substantially the same manner as that of the groove 28, formed in the sleeve 21, the lead of the spiral groove 64, being substantially the same as that of the groove 23, formed in the sleeve 21, in order to obtain the same, or a proportional longitudinal movement of the indicator slide, with the same circumferential movement of the typewriter cylinder Ill, the exact movement depending upon the ratio between the diameter of the roller 60, and the cylinder Hi.

In addition to the single spiral groove 64, shown in Fig. 8, a plurality of equally-spaced auxiliary spiral grooves 65, and 66, of the same cross-section, may be interposed in the outer surface of the auxiliary roller, the grooves 55 and 66, which have the same leads as that of the groove 64, being equally spaced between the adjacent individual sections 61 and 51a of the groove 64.

This enables the operator to relocate the slide Si in the starting position, against a stop 68, mounted on the scale section of the frame, without rotating the roller 89, the follower tip 69, dropping into any one of the three spiral grooves 64, 65, or 65, which is located in the proper longitudinal and angular position to receive the follower tip.

The roller 80 is in direct contact with the paper I I, mounted on the typewriter cylinder, the roller being angularly moved by the rotational movement of the cylinder, in substantially the same manner as the friction bands 33, shown in Figs. 3 and 4, and the roller on which they are mounted. The roller 60 may therefore be of substantially the same diameter as that of the friction bands 33, shown in Fig, 3', where the same groove lead is used, in order to maintain the same graduation spacing on the scale, or the roller diameter may be reduced, the groove lead, or the graduation spacing being altered to compensate for the change in ratio between the roller diameter, and the typewriter cylinder diameter.

A follower 10, the tip 69 of which fits into the spiral groove formed in the roller, may be attached to a plate H, attached to the upper section of the indicator slide 6|, slidably fitted to the scale section 58, of the frame, as indicated in Fig. 10.

The indicator slide Bl slidably mounted on the scale section 58 of the frame, may be formed of two pieces, an upper U-shaped face section '12, made of Lucite, or other transparent plastic material, and a lower plate ll, attached to the two side walls 13, of the face section, by a plurality of screws, rivets, or other suitable attaching means, mounted below the scale section of the frame.

A formed plate spring 74 may be attached to the lower plate ll, of the slide, by means of a nut, threadably attached to the follower 10, or by a riveted head l5, formed integral with the upper portion of the follower, as indicated in Fig. 10, the formed ends 16, of the spring, engaging the lower edge of the scale section 58, of the frame, to retain the face of the slide in engagement with the upper surface of the scale section 58, as indicated in Fig. 10.

The stop 68, comprises a substantially U-shaped member, a slot formed in the center of which, fits over the scale section of the frame, as indicated in Fig. 10. A set screw Tl, may be threadably inserted in the upper wall 18, of the stop, to retain the stop in any adjusted position with relation to the scale section, thereby limiting the starting position of the slide, in substantially the same manner as the stop collar 54, shown in Figs. 3 and 4.

A circumferential groove 19, the cross-section of which is substantially the same as that of the spiral groove 64, may be formed in the outer circumference of the roller, adjacent the right-hand frame flange, the groove being in direct communication with the end of the spiral groove 64, where a single groove is used, as indicated in Fig. 10, the auxiliary grooves 65 and 66, shown in Fig. 12, also leading into the circumferential groove 19, to enable the follower to pass freely from any of the spiral grooves to the circumferential groove, when the slide reaches the end of its longitudinal movement, in order to retain the slide in a stationary position, in substantially the same manner as that shown in Figs. 3 and 4.

A pair of collars 80, may be mounted on the bar [6, adjacent the outer end of the frame flanges 59, a set screw 8|, being threadedly inserted in each of the collars, to grip the bar and retain the collars and the frame in their adjusted position on the bar.

The unit shown in Figs. 3 and 4, may be installed on a typewriter by sliding the sleeve 21, the frame 20, and the collars 23, along the bar, to the required operating position. The two collars 23 and the sleeve may be clamped to the bar in the adjusted position, by tightening the adjusting 9 screws in the sleeve and the collars, respectively, against the bar.

In operating the unit, shown in Figs. 3 and 4., the stop collar 54 is moved along the sleeve, until the indicator slide is set at the position of the first typewritten line with relation to the top of the page, this being the end of the printed portion of the letterhead, or the first line following the top margin of a blank sheet, such as a legal sheet. The adjusting screw 55, in the stop collar 54, may be tightened against the bar.

The paper is inserted around the cylinder of the machine in the conventional manner, and the top of the page positioned on the cylinder, so that it is aligned with the reading on the graduated scale.

The operator proceeds with the typing in the conventional manner, each line spacing of the cylinder moving the indicator slide one or more spaces along the scale graduations, depending upon whether the machine is set for single or multiple spacing.

As the typing proceeds, the hairline on the indicator slide shows the position of each line with relation to the top of the sheet. In approaching the bottom of the sheet, the operator, by observing the position of the hairline on the indicator slide, is able to locate the required margin at the bottom of the sheet, or to write down to approximately the bottom of the sheet, without removing the sheet from the cylinder.

The end position is determined by the scale corresponding with the length of the sheet used, such as Letter, Legal, or any other scale used, corresponding to another sheet length.

After the page is completed, the operator restores the slide control roller 3!), to its initial position, by manually rotating it about the sleeves, against the stop collar 54, the typewriting proceeding in the conventional manner.

Where short letters are written, or the operator desires to use the machine without using the line indicator, the slide control roller 38, is either manually moved to the right end position, shown in dot-dash lines, Fig. 3, or the roller may be allowed to move to this position by the operation of the line spacer of the typewriter cylinder, until the follower ball 31 leaves the spiral groove 28, and enters the circumferential groove 51, formed adjacent the right-hand end of the sleeve.

The ball follower 3! remains in the circumferential groove 5?, the slide control roller rotating in the same longitudinal position with relation to the sleeve, thereby holding the slide stationary, regardless of the position and movement 'of the typewriter cylinder, or the paper wrapped around it.

The unit shown in Figs. 8 and 9 may be installed and operated in substantially the same manner as that shown in Figs. 3 and 4, and above described, except that after the indicator slide M has reached the end of its longitudinal movement, along the scale section, the follower tip 59, may be removed from the groove 52, by compressing the spring i l, and the indicator slide moved left-- ward against the stop 88, the roller being moved through a slight angle to bring one of the grooves 6 3, E5, or 66, into position to receive the follower tip 69.

The length of the sleeve 2'! may be increased or decreased, depending upon the lead of the spiral groove, and the spacing of the individual line graduations, required on the scale.

The diameter of the sleeve and the roller 3B, are determined by the diameter of the friction 1% bands 33, which are made slightly larger in diameter than the clamping rollers, mounted on the bar, to assure contact of the band, with the paper, at all times.

The spacing of the graduations may be increased by either increasing the lead of the spiral groove, or reducing the diameter of the slide control roller.

The cross-section of the spiral groove 28, the circumferential groove 57, and the groove formed in the slide control roller, may be altered to suit the cross-section of the corresponding follower. The grooves may, therefore, be of semi-circular cross-section, rectangular, V-shaped or a small radius may be formed at the bottom of the groove, with the sloping sides tangent to the radius at the bottom. The follower tip cross-section would be substantially the same as that of the groove, some clearance being allowed at the sides, to allow the follower to slide freely along the spiral groove.

In the modified construction, shown in Figs. 8 and 9, the roller surface may be coated to provide a friction surface which engages the paper.

The roller 59, used in the modified construction, may be of uniform diameter over its entire length or a series of bands or raised sections, may be formed at various points along the roller length, the diameter of the rollers, between the bands, being reduced to form contact areas at several points only.

The roller may be formed of one piece of plastic material, or metal, as indicated in Figs. 8 and 9, or a composite roller formed with a metal core, and a plastic sleeve surrounding it, may be substituted therefor.

The diameter of the roller would be substantially the same as that of the friction bands, in the construction shown in Figs. 3 and 4, where the same line graduations, and the same spiral groove lead are used.

Where the roller diameter is reduced, the lead of the spiral groove may be varied to compensate for the ratio of angular movement between the roller 60, and the typewriter cylinder.

The length of the roller 60, would be determined by the length of the indicator scale, the spacing of the graduations thereon, the lead of the spiral groove, and the ratio between the roller diameter, and the cylinder diameter of the typewriting machine.

It will be apparent to those skilled in the art that my present invention is not limited to the specific details described above and shown in the drawings, and that various further modifications are possible in carrying out the features of the invention without departing from the spirit and scope of the appended claims.

What I claim is:

1. In a typewriter, having a paper support cylinder, a line spacer mechanism rotating said cylinder, coordinated with the line spacing of the typewriter, and a roller clamp support bar pivotally mounted adjacent said cylinder, and substantially parallel thereto, an attachment comprising a frame, having a scale section formed integral therewith, means slidably supporting the frame on said bar, means locating the frame on the bar, a substantially cylindrical sleeve mounted on the bar, said sleeve having a spiral groove formed in the outer circumference thereof, an indicator slide, made of a transparent material, slidably supported on the scale section of the frame, means supported by said sleeve, contact ing the paper on the cylinder, means coordinating said contact means with the spiral groove formed in the sleeve, and means attached to the indicator slide, transferring the longitudinal movement of the paper contact means to the slide, the scale section of the frame having a plurality of graduations formed thereon, to indicate the position of the slide with relation to the position of the typewritten line spacing on the paper, fitted to the cylinder, from the starting position.

2. In a typewriter, having a rotating paper support cylinder, means controlling the rotation of the cylinder coordinated with the line spacing, and a bar, pivotally attached to the typewriter, supporting a plurality of rollers, normally in contact with the paper on the cylinder, an attachment comprising a frame, having a scale section formed integral therewith, slidably supported on the bar, means locating the frame on the bar, a substantially cylindrical sleeve, mounted on the bar, in substantial alignment with the frame, a roller rotatably and slidably mounted on the sleeve, means supported by the roller, contacting the paper mounted on the cylinder, to transfer the line spacing movement of the cylinder to the roller, cooperating means on said roller and sleeve converting the rotational movement of the contact means to longitudinal movement of the roller, an indicator slide, made of a transparent material, slidably supported on the scale section of the frame, and means attached to the slide, engaging the roller, to transmit the longitudinal movement of the roller to the indicator slide, the. scale section of the frame having a plurality of graduations formed thereon, to indicate the position of the slide with relation to the line spacing on the paper, mounted on the cylinder, from the starting position.

3. In a typewriter, having a paper support cylinder rotatably mounted thereon, a mechanism rotating said cylinder, coordinated with the line spacing of the typewriter, and a roller clamp support bar, pivotally mounted on the machine, adjacent the cylinder, and substantially parallel thereto, a line indicator attachment comprising a frame, having a scale section formed integral therewith, a plurality of flanges formed integral with said scale section, said flanges being supported by the bar, means locating the frame flanges on the bar, a substantially cylindrical sleeve mounted on the bar, between the frame flanges, said sleeve having a spiral groove formed around the outer circumference thereof, an indicator slide, made of a transparent material, slidably mounted on the scale section of the frame, a roller slidably and rotatably supported by the sleeve, means mounted on said roller, contacting the paper on the cylinder, to transfer the circumferential movement of the cylinder to the roller, means attached to the roller, fitting the spiral groove formed in the sleeve, to convert the rotation of the roller to longitudinal movement thereof, and means attached to the slide, transmitting the longitudinal movement of the roller to the slide, the scale section of the frame having a plurality of graduations formed thereon, to indicate the position of the slide, with relation to the position of the typewritten line spacing on the paper, fitted to the cylinder, from the starting position.

4. In a typewriter, having a rotating paper support cylinder, means controlling the rotation of the cylinder coordinated with the line spacing of the typewriter, and a bar pivotally attached to the typewriter, supporting a plurality of rollers, normally in contact with the paper on the cylinder, an attachment comprising a frame, having a scale section formed integral therewith, slidably supported on the bar, means locating the frame on the bar, a substantially cylindrical sleeve mounted on the bar, in substantial alignment with the frame, said sleeve having a spiral groove formed around the outer circumference thereof, a roller rotatably mounted on the sleeve, means supported by the roller, contacting the paper mounted on the cylinder, means supported by said roller, fitted to the spiral groove, formed in the sleeve, said roller having a groove formed around the outer circumference thereof, an indicator slide, made of a transparent material, slidably supported on the scale section of the frame, and means attached to the slide, engaging the groove formed in the roller, the scale section of the frame having a plurality of graduations formed thereon, to indicate the position of the slide with relation to the line spacing on the paper mounted on the cylinder, from the starting position.

5. In a typewriter, having a paper support cylinder rotatably mounted thereon, a mechanism rotating said cylinder, coordinated with the line spacing, and a roller Clamp support bar pivotally mounted on the typewriter, adjacent the cylinder, and substantially parallel thereto, a line indicator attachment comprising a frame, having a scale section formed integral therewith, a plurality of flanges formed integral with said scale section, said flanges being supported by the bar, means mounted adjacent said flanges, adjustably locating the frame on the bar, a substantially cylindrical sleeve mounted on the bar, between the frame flanges, said sleeve having a spiral groove formed around the circumference thereof, means adjustably clamping the sleeve to the bar, an indicator slide, made of a transparent material, slidably mounted on the scale section of the frame, a roller slidably and rotatably supported by the sleeve, adjustable means limiting the starting position of the roller with relation to the sleeve, means mounted on said roller, contacting the paper on the cylinder, to transmit the circumferential movement of the cylinder to the roller, means attached to the roller, fitting the spiral groove formed in the sleeve, to convert the rotation of the contact means to longitudinal movement of the roller, and means attached to the slide, transmitting the longitudinal movement of the roller to the slide, the scale section of the frame having a plurality of graduations formed thereon, to indicate the position of the slide with relation to the position of the typewritten line spacing on the paper, fitted to the cylinder, from the starting position.

6. In a typewriter, having a rotating paper support cylinder, means controlling the rotation of the cylinder, coordinated with the line spacing, and a bar pivotally attached to the typewriter, supporting a plurality of rollers normally in contact with the paper on the cylinder, an attachment comprising a frame, having a scale section formed integral therewith, slidably supported on the bar, means locating the frame on the bar, a substantially cylindrical sleeve mounted on the bar, in substantial alignment with the frame, said sleeve having a spiral groove formed around the circumference thereof, means adjustably clamping the sleeve to the bar, a roller slidably and rotatably mounted on the sleeve, means adjustably clamped to the sleeve, limiting the starting position of the roller, means supported by the roller, contacting the paper mounted onthe cylinder, to transmit the circumferential movement of the cylinder to the roller, a follower, supported by said roller, fitted to the spiral groove formed in the sleeve, said sleeve having a circumferential groove formed thereon, in communication with the spiral groove, adjacent one end of the sleeve, the cross-section of the circumferential groove being substantially the same as the spiral groove, said roller having a groove formed around the circumference thereof, an indicator slide, made of a transparent material, slidably supported on the scale section of the frame, and means attached to the slide, engaging the groove formed in the roller, the circumferential groove in the sleeve retaining the roller and the slide, in a relatively stationary longitudinal position, regardless of the rotational movement of the paper contact means, when the engaging means is in contact with the circumferential sleeve groove, the scale section of the frame having a plurality of graduations formed thereon, to indicate the position of the slide with relation to the line spacing on the paper, mounted on the cylinder, from the starting position.

7. In a typewriter, having a paper support cylinder rotatably mounted thereon, a mechanism rotating said cylinder, coordinated with the line spacing, and a roller clamp support bar, pivotally mounted on the typewriter, adjacent the cylinder, and substantially parallel thereto, a line indicator attachment comprising a frame having a scale section formed integral therewith, slidably supported on the bar, a collar adjustably clamped to the bar, mounted adjacent each end of the frame, said collars locating the frame, a substantially cylindrical sleeve mounted on the bar, said sleeve having a spiral groove formed around the circumference thereof, an indicator slide, made of a transparent material, slidably mounted on the scale section of the frame, a roller slidably and rotatably supported by the sleeve, a stop collar, adjustably clamped to the bar, limiting the longitudinal movement of the roller, in one direction, means clamping the stop collar against the bar, means mounted on said roller, contacting the paper on the cylinder, to transmit the circumferential movement of the cylinder to the roller, a follower, supported by the roller, fitting the spiral groove formed in the sleeve, to convert the rotation of the contact means to longitudinal movement of the roller, said sleeve having a circumferential groove formed thereon, in communication with the spiral groove, adjacent one end of the sleeve, the cross-section of the circumferential groove being substantially the same as the spiral groove, and means attached to the slide, transmitting the longitudinal movement of the roller to the slide, the circumferential groove retaining the roller and the slide, in a relatively stationary longitudinal position, regardless of the rotational movement of the paper contact means, when the follower is in engagement with the circumferential groove, the scale section of the frame having a plurality of graduations formed thereon, to indicate the position of the slide with relation to the position of the typewritten line spacing on the paper, fitted to the cylinder, from the starting position.

8. In a typewriter, having a paper support cylinder rotatably mounted thereon, a mechanism rotating said cylinder, coordinated with the line spacing of the typewriter, and a roller clamp support bar pivotally mounted on the typewriter, adjacent the cylinder, and substantially parallel thereto, a line indicator attachment comprising a frame, having a scale section formed integral therewith, slidably supported by the bar, means mounted adjacent the ends of said frame, adjustably locatin the frame on the bar, said scale section having a longitudinal slot formed therethrough, a substantially cylindrical sleeve mounted on the bar, said sleeve having a spiral groove formed around the circumference thereof, means adjustably clamping the sleeve to the bar, an indicator slide, made of a transparent material, slidably mounted on the scale section of the frame, means formed integral with the slide, guiding the slide along the frame, a roller slidably and rotatably supported by the sleeve, a stop collar, adjustably clamped to the bar, limit ing the longitudinal movement of the roller, in one direction, friction means, mounted on the roller, contacting the paper on the cylinder, to transmit the circumferential movement of the cylinder to the roller, a follower, supported by the roller, fitting the spiral groove formed in the sleeve, to convert the rotation of the friction means to longitudinal movement of the roller, said roller having a groove formed around the outer circumference thereof, a follower, attached to the indicator slide, engaging the groove formed in the roller, to transmit the longitudinal movement of the roller to the slide, and means formed on said follower, fitting the slot formed in the scale section of the frame, to guide the follower along the slot, the scale section of the frame having a plurality of graduations formed thereon, to indicate the position of the slide with relation to the position of the typewritten line spacing on the paper, fitted to the cylinder, from the starting position.

9. In a typewriter, having a paper support cylinder rotatably mounted thereon, a mechanism rotatin said cylindeg coordinated with the line spacing, and a roller clamp support bar pivotally mounted on the typewriter, adjacent the cylinder, and substantially parallel thereto, a line indicator attachment comprising a frame, having a scale section formed integral therewith, a plurality of flanges formed integral with said scale section, said flanges being supported by the bar, means adiustably clamped to the bar, ad- J'acent said flanges, locatin the frame on the bar, a substantially cylindrical sleeve mounted on the bar, between the frame flanges, said sleeve having a spiral groove formed around the circumference thereof, means adjustably clamping the sleeve to the bar, an indicator slide, made of a transparent material, slidably mounted on the scale section of the frame, a roller slidably and rotatably supported by the sleeve, a friction band, mounted on said roller, contacting the paper on the cylinder, to transmit the line spacing movement of the cylinder to the roller, means attached to the roller, fitting the spiral groove formed in the sleeve, to convert the rotation of the friction band to longitudinal movement of the roller, and means attached to the slide, transmittin the longitudinal movement of the roller to the slide, the scale section of the frame having a plurality of graduations formed thereon, to indicate the position of the slide with relation to the position of the typewritten line spacing on the paper, litted to the cylinder, from the starting position.

10. In a typewriter, having a paper support cylinder rotatably mounted thereon, a mechanism rotatin said cylinder, coordinated with the line spacing, and a roller clamp support bar pivotally mounted on the typewriter, adjacent the cylinder, and substantially parallel thereto, a lin indicator attachment comprising a frame, having a scale section formed integral therewith, a plurality of flanges formed integral with said scale section, said fianges being supported by the bar, means adjustably clamped to the bar, adjacent said flanges, locating the frame on the bar, a substantially cylindrical sleeve mounted on the bar, said sleeve havin a spiral groove formed around the circumference thereof, means adjustably clamping the sleeve to the bar, an indicator slide, made of a transparent material, slidably mounted on the scale section of the frame, means guiding the slide along the scale section of the frame, a roller slidably and rotatably supported by the sleeve, a friction band, mounted on said roller, contacting the paper on the cylinder, to transfer the circumferential movement of the cylinder to the roller, means attached to the roller, fittin the spiral groove formed in the sleeve, to convert the rotation of the friction band to longitudinal movement of the roller, and means attached to the slide, transmitting the longitudinal movement of the roller to the slide, the scale section of the frame having a plurality of graduations formed thereon, said slide having a transparent face mounted above said graduations, with a hairline formed on the slide face in substantial alignment with the graduations, the location of the slide hairline relative to the graduations, indicatin the position of the typewritten line spacing on the paper, fitted to the cylinder, with relation to the starting position.

11. In a typewriter, having a paper support cylinder rotatably mounted thereon, a mechanism rotating said cylinder, coordinated with the line spacing, and a roller clamp support bar pivotally mounted on the typewriter, adjacent the cylinder, and substantially parallel thereto, a line indicator attachment comprising a frame having a scale section formed integral therewith, slidably supported on the bar, a plurality of collars adjustably clamped to the bar, adjacent the ends of the frame, locating the frame on the bar, a substantially cylindrical sleeve mounted on the bar, said sleeve having a spiral groove formed around the circumference thereof, means adjustably clamping the sleeve to the bar, an indicator slide, made of a transparent material, slidably mounted on the frame, said slide having a pair of flanges formed integral therewith, to guide the slide along the scale section of the frame, a roller slidably and rotatably supported by the sleeve, a friction band, mounted on said roller, contacting the paper on the cylinder, to transmit the line spacing movement of the cylinder to the roller, means attached to the roller, fitting the spiral groove formed in the sleeve, to convert the rotation of the friction band to longitudinal movement of the roller, and means attached to the slide, transmitting the longitudinal movement of the roller to the slide, the scale section of the frame having a plurality of individual graduations formed thereon, each individual graduation indicating one typewriter line space, and a plurality of multiple space graduations, interposed between said individual graduations, with figures formed in substantial alignment with said multiple space graduations, to indicate the location of said graduations relative to the starting position, said slide having a transparent face, through which the graduations are visible, with a hairline formed on the slide face in substantial alignment with the graduations,

the location of the slide hairline, relative to the graduations, indicating the position of the typewritten line spacing on the paper, fitted to the cylinder, from the starting position.

12. In a typewriter having a paper support cylinder, a line spacer mechanism rotating said cylinder, and a roller clamp support bar pivotally mounted adjacent said cylinder, an attachment comprising a frame having a scale section integral therewith, means slidably supporting the frame on said support bar, means locating the frame on the support bar, a substantially cylindrical sleeve mounted on the bar, said sleeve having a spiral groove formed in the outer circumference thereof, an indicator slide made of a transparent material slidably supported on the frame scale section, a tubular roller rotatably mounted on said cylindrical sleeve, said tubular roller having a groove around the outer circumference thereof, a pair of friction bands attached to the outer circumference of the tubular roller, said friction bands contacting the paper on the cylinder to rotate the tubular roller, a ball slidably fitted to the tubular roller in a substantially radial position, said ball fitting into the spiral groove in the sleeve to translate the rotational movement of the tubular roller to longitudinal movement thereof, and a roller follower attached to the indicator slide, said roller follower fitting the tubular roller outer groove to co-ordinate the longitudinal movement of the indicator slide with the tubular roller, the scale section of the frame having a plurality of graduations formed thereon, to indicate the position of the slide with relation to the position of the typewritten lines on the paper fitted to the cylinder.

13. In a typewriter, having a paper support cylinder rotatably mounted thereon, a mechanism rotating said cylinder, coordinated with the line spacing, and a roller clamp support bar pivotally mounted on the typewriter, adjacent the cylinder, and substantially parallel thereto, a line indicator attachment comprising a frame, having a scale section integral therewith, means slidably supporting the frame on said roller clamp support bar, means locating the frame on the roller clamp support bar, a substantially cylindrical sleeve mounted on the bar, said sleeve having a spiral groove formed around the outer circumference thereof, a tubular roller rotatably mounted on the cylindrical sleeve, said tubular roller having a groove around the outer circumference thereof, a pair of friction bands attached to the outer circumference of the tubular roller adjacent the circumferential groove engaging the paper when mounted on the paper support cylinder to rotate the tubular roller, a ball slidably supported by the tubular roller in a substantially radial position fitting into the spiral groove in the sleeve to translate the rotational movement of the tubular roller to longitudinal movement thereof, an indicator slide, having a face made of a transparent material, slidably supported on the scale section of the frame, and a roller follower attached to the indicator slide, said roller follower fitting into the tubular roller circumferential groove to co-ordinate the longitudinal movement of the indicator slide with the tubular roller, the scale section of the frame having a plurality of graduations formed thereon, to indicate the location of the slide with relation to the position of the typewritten line spacing on the paper, fitted to the cylinder, from the starting position.

14. In a typewriter, having a paper support cylinder rotatably mounted thereon, a mechanism rotating said cylinder, coordinated with the line spacing, and a roller clamp support bar pivotally mounted on the typewriter, adjacent the cylinder, and substantially parallel thereto, a line indicator attachment comprising a frame having a scale section in conjunction therewith, means slidably supporting the frame on the bar, means locating the frame on the roller clamp support bar, a substantially cylindrical sleeve mounted on the bar, said sleeve having a spiral groove formed around the outer circumference thereof, a tubular roller rotatably mounted on the cylindrical sleeve, said tubular roller having a groove around the outer circumference thereof, a pair of friction bands attached to the outer circumference of the tubular roller adjacent the circumferential groove, said friction bands engaging the paper when mounted on the cylinder to rotate the tubular roller, said tubular roller having a radial opening through one side thereof, a ball slidably supported within the tubular roller opening, said ball engaging the spiral groove in the sleeve to translate the rotational movement of the tubular roller to longitudinal movement thereof, means mounted in said roller opening operative to retain the ball within said opening in engagement with the spiral groove, an indicator slide, having a face made of a transparent material, slidably supported on the frame, means attached to the indicator slide, normally retaining the face of the slide in engagement with the scale section of the frame, and a roller follower attached to the indicator slide, said roller follower fitting into the tubular roller circumferential groove to co-ordinate the longitudinal movement of the indicator slide with the tubular roller, the scale section of the frame having a plurality of graduations formed thereon, to indicate the location of the slide with relation to the position of the typewritten line spacing on the paper, fitted to the cylinder, from the starting position.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,326,346 Hsieh et al Dec. 30, 1919 2,459,885 Krogseng Jan. 25, 1949

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