US2342560A - Printer for instrument scales - Google Patents

Description

2 1944- T. SLONCZEWSKI PRINTER FOR INSTRUMENT SCALES Filed Dec. 23, 1941 2 Sheets-Sheet 1 INVENTOR 7.'$LONCZEW5K/ AT TORNE V Feb. 22, 19 'r. SLONCZEWSKI PRINTER FOR INSTRUMENT SCALES Filed Dec. 23, 1941 2 Sheets-Sheet 2 FIG. 3

//v VEN TOR 7. SLONCZEWSK/ ATTORNEY Patented Feb. 22, 1.944

PRINTER. FOR INSTRUMENT SCALES Thaddeus Sioncsewski, Glenwood Landing, N. Y.,

asslgnor to Bell Telephone Laboratories, Incorporated, New York, N. Y., a corporation or New York Application December as, 1941, Serial No. 424,132

2 Claims.

This invention relates to an apparatus for printing instrument scales and more particularly to a means for printing the subdivisions on instrument scales subsequent to the manual calibration of a series or predetermined discrete points on the scales.

Manual calibration of instrument scales is usu ally accomplished by inscribing thereon a series of discrete calibration marks throughout the length of the scale. Subdivisions arethereafter printed between these discrete calibration marks by geometrically dividing the spaces between them into equal parts. Most indicating instruments are so designed that the adjacent spaces between these calibration marks do not differ greatly. subdividing these spaces into equal parts, therefore, introduces no appreciable error and is entirely practicable.

It is the object of this invention to provide an apparatus for rapidly and accurately printing the subdivisions between the previously calibrated points on an instrument scale.

The foregoing object is achieved by this invention by providing a specially constructed printing press having a plurality of printing rules on its type bed corresponding to the subdivisions to be printed and an adjusting mechanism for simultaneously adjusting the distances between the rules by proportional amounts.

The invention may be better understood by referring to the accompanying drawings, in which:

Fig. 1 shows schematically the linkage mechanism of a manually operated printing press adapted for the practice of this invention;

Fig. 2 is a front view of the specially constructed type bed disclosing the mechanism for simultaneously adjusting the distances between the printing rules;

Fig. 3 shows how the printing rules may be aligned with the previously inscribed calibration indicia;

Fig. 4 shows a section through one of the printing rules;

Fig. 5 shows an end View and partial sectionthrough a portion 01' Fig. 2; and

Fig. 6 discloses an alternative form of type bed mechanism.

Referring now more particularly to Fig. 1 wherein a printing press mechanism I is shown in schematic form. The linkage as shown comprises essentially three movable links 8. A handle 8 is attached to one of these links for operating the press in'a well-known manner. Cooperating with this linkage is a bed 2, a platen anism for operating the press also moves ink roll 5 over type bed 2 and onto ink disc 4. As the mechanism for performing this function is common to all printing presses of this type, it is not shown in order to simplify the description. A reflector I2 is supported by a rod ll secured to a portion l0 0! the press linkage.

Type bed 2 has supported thereon a plurality of printing rules or bars I and It, more particularly hereinafter described in connection with Fig. 2. These printing rules are adapted to print a series of lines on an instrument scale I! held by platen 3. A detailed description of the operation of the printing press per se is entirely unnecessary as its operation is essentially idential with all hand-operated printing presses.

In order to practice this invention itis un necessary to employ the particular type of linkage disclosed in Fig. 1 as any other type of printing press linkage commonly used with either hand-operated presses or with any of the wellknown Job presses may be used. The particular linkage here shown was chosen for illustrative purposes only.

The plane of reflector I2 is so positioned with respect to the plane of the platen 3 and the plane of bed 2 as to bisect the angle 0 formed thereby. An observer's eye it may be placed above the press so as to view both the images of the printing rules 1 and I5 and the two adjacent calibration marks on the-instrument scale l3. In this position the plane of the images of rules I and I5 will exactly coincide with the plane of the instrument scale l3 so as to avoid any possible difliculty with parallax. The use of the reflector in the manner just described insures accurate registration of the printing rules 1 and IS with the previously inscribed indicia on the instrument scale l3.

Fig. 2 shows one form of specially constructed type bed for the practice of this invention. A plurality of short printing rules I and a longer one I! are provided for printing the scale. The previously inscribed indicia made during calibration are usually made in pencil and require printing over with ink in order to insure permanence, legibility and uniformity in appearance. The longer printing rule l5, mounted integral with slide I8, is provided for this purpose. Slide [8 is adapted for accurate sliding motion in grooves provided in bed 2. The intervening subdivisions are printed by the short printing rules I of which four are shown in Fig. 2. Obviously "a different number of printing rules I must be 3, an ink disc 4 and an ink roll 5. The mech- 66 employed where the particular scale to be printed requires a different number of subdivisions.

Printing rules I are mounted on a plurality of parallel bars I which in turn are attached to two pantograph systems 2|, 2. An additional bar I! is mounted integral with bed plate 2 by means oi pivots 23, 22. an index line II is inscribed on bar II for alignment purposes as will be more particularly described hereinafter in connection withl 'ig. 3. Pivot points 22 01' the pantograph systems are attached to slide It in line with printing rule II and it will be understood that as slide I8 is slid laterally in bed 2 the two pantois mounted to a threaded shaft which cooperates with a threaded hole in a lug l8 integral with slide ll. Clearance is provided for lug I8 in bed 2 by a longitudinal slot 2| formed in the back of the bed.

In practicing this invention the eye is placed directly over the reflector and-scale to be printed as shown in Fig.1. The scale it and the images of the printing rules I and IE will then be seen simultaneously in the same plane as shown in Fig. 3. In thisu l reflector I2 is shown superimposed over scale [3. Reference characters I, i5 and II denote the images of their corresponding printing rules I, It and the index line l6 inscribed on bar ll asshown in Fig.2. Since,

as previously stated, these images are in exactly the same plane as the scale I3, they do not move with respect to the marks on scale It when the eye I4 is moved about over the press. The longer printed lines 2| on scale It were made by printing rule ll during the preceding impressions oi the press. The tour intervening shorter marks were made by the four printing rules I. Reference character 2| denotestwo of the previously inscribed calibration marks made temporarily by pencil preparatory to the final printing in accord ance with this invention. After the preceding impression by the printing press has been made the Fig. 4 shows a section through one of the type rules I and its supporting bar I. A section through printing rule ll would appear the same except that instead or being two pieces it would,

be one piece and attached to slide ll. Itwill be understood,oi course, that the indicia are printed by the raised portion 34 of these rules.

Fig. 5 shows an end view and partial section or the mechanism shown in Fig. 2. Here it will be seen how slide II is precision mounted in bed plate 2. A pair of slots ll, 30 cut in slide I! provides means for connecting pantograph mechanism 24, 24 to the plurality oi bars 8 through a series 01' spacers 3|, two of which have been shown dotted in Fig. 2. Pivot point 23 is additionally attached directly to bed plate 2 by means of a boss 32. Pivot points 22, 22 are attached directly to slide I8 from the underside, while the pivot points 33 for-the iour interveningbars are all attached to their corresponding pantograph link through one of the spacers 3|.

Fig. 6 discloses an alternative form or mechanism for bed 2. In Fig. 2 the pantograph mechanisms 24, 24 were mounted between slide it and bed 2 whereas in Fig. 6 these pants graph mechanisms-are mounted on top of slide ll. With this type of construction the spacers 3! are not needed but the short bosses 32 01' Fig. 5 are extended through the slots ill as indicated by reference character 35 in Fig. 6. This form of mechanism is operated in the same manner as the mechanism of Fig. 2 and the corresponding parts of the two figures have the same reierpress is opened and scale I! is'slid along platen 3 until the lastlong printed mark 28 exactly coincides with the image II oi index mark ll.

It will be remembered that index mark it is always stationary with respect to bed '2. Knob I9 is then turned until the image I5 of printing rule ll exactly coincides with the next previously calibration mark 29. Since movement of knob It does not displace the index mark it,

the coincidence or line 2| with respect to the image ll is'not disturbed. After this adjustment has been completed the tour subdivision marks corresponding with printing rules I as well as the long line corresponding with printing rule I! are simultaneously printed by simply operating the printing press. when the impression is com- I ence characters.

What is claimed is: Y

1. Means for printing subdivisions on instrument scales comprising a printing press including as parts thereof a platen and a type bed, a

plurality of printing rules on the type bed corresponding to the subdivisions to be printed, a

.' reflector positioned to form images of said printing rules in the plane of the platen when the press is open, and an adjusting mechanism for simultaneously adjusting the distances between all of said rules by proportional amounts.

2. Means for printing subdivisions on instrument scales comprising a printing press including as'parts thereof a platen and a type bed each comprising substantially plane surfaces adapted to form a dihedral'angle when the press is open, a plurality of printing rules on said type bed corresponding to the subdivisions to be printed,

a plane surface reflector so positioned with respect to the type bed and platen as to bisect the angel formed by their planes when the press is opened whereby the images of said printing rules are caused to lie in the plane or the platen when the press is open, and an adjusting mechanism for simultaneously adjusting the distances between .all of said rules by roportional amounts.

'I'HADDEUS SLONCZEWSKI.

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