US1598389A - Typewriting machine - Google Patents

Description

Aug. 31

INVENTOR WITNESSES ATTORNEY Patented Aug. 31, 1926.

JOSEPH PHELPS, 01 NORTH CALD WELL,

F F l C E NEW JERSEY, ASSIGNOR T REMINGTON TYPEWILIIER C(JMPANY. OF ILION, lIEi/V YORK, A CORPORATION OF NEW' YORK.

TYPEWRITING MACHINE.

Application filed May 1, 1925. Serial No. 27,281.

My invention relates to paper feeding mechanism for typewriting machines, and its main object is to provide a new and improved paper bail which cooperates with the platen to give lll'lPiOVQCl control of the paper at the printing side or face of the platen and is also itself controlled and positioned with great facility.

To the above and other ends which will hereinafter appear my invention consists in the features of con truction, combinations of devices, and arrangements of parts hereinafter described and particulary pointed out in the claims.

In carrying out my invention in the present instance, arms are provided which are fixed to a rod secured on the platen carriage and extending lengthwise of the platen above the same. The fixed arms extend forward and provide supports for short crank arms which are pivoted thereto and extend rearward, being connected rigidly by a rod on which are mounted pressure rolls. rolls, rod and short crank arms constitute the bail which normally is so disposed that it inclines rearward and slightly upward so that the rolls may co-operate with the platen above the printing line. The rolls are maintain'ed in co-operation with the platen by springs of a novel construction and which are adapted to engage with square or rectangular studs comprised in the pivotal portions of the bail. The opposite sides or branches of said springs tend to equalize the pressure on the bail pivots, and in addition so cooperate with the bail either to maintain it engaged with the platen or in an upright released position sutiieiently removed from the platen to facilitate the introduction and adjustment of work sheets. Additionally, the springs are adapted to maintain the bail thrown forward horizontally where it is further removed from the platen. and entire lv clears it, thus facilitating erasures or the like. My invention will be more specifically described and exp ained in connection with the accompanying drawings, wherein Figure 1 is a fragmentary plan view of the platen and carriage of a No. 60 Smith Premier typewriting machine to which the preferred form of my invention is shown as applied, parts being omitted and parts broken away for the sake of clearness. Y

Figure 2 is a fragmentary end view of the carriage and its hearing.

The

Figure 3 is an enlarged horizontal sectional view taken on a plane indicated by the section line 1-1 in Figure 1. and looking in the direction of the arrows at said line, said figure showing the bail in one of its released or thrown-off positions.

Figure 4 is a view corresponding to ure 3 but showing the bail in another position.

Referring first to Figures 1 and 2, it will be understood that the top plate 1 of the machine is surmounted by a pair of station? ary brackets :2 spaced apart, one disposed at each side of the machine and each bracket being rearwardly curved or goose-necked. The brackets are only fragnientarily shown herein but correspond to the bracketsof the Smith Premier No. 60 machine. Secured to the upper end portions of the brackets 2 by screws 3 is a stationary guide rail 4, the lower portion of the brackets having secured to them by screws 5 a guide rail The two guide rails i and 6 are parallel and formed with oppositely faced V-shaped grooves which receive antifriction rollers 7, said rollers likewise co-operating with grooves formed at the top and bottom of a race rail or slide bar 8 which provides the rear bar of a traveling platen carriage. Said carriage further comprises end bars 9 secured to and extending forward from the ends of the bar 8. The carriage or frame comprising the end bars 9 and the rear bar 8 rotatably supports a cylindrical platen 10 provided with axle portions 11 and 12 which project from the ends of the platen and bear in the end bars 9. The usual line spacing devices and printing instruinentalities are provided, although they are not shown herein, the printing point being at the front of the platen and indicated by the numeral 15. The paper feeding instrumentalities coinprise. pressure rols co-operative with the under side of the platen and conventionally shown, said rollers being designated by the numerals 14 and 15.

Extending lengthwise of the platen above the same and somewhat to the rear of its central vertical plane is a supporting rod or bar 16 which is secured at its ends by screws 18 and 19 to the end bars 9 of the platen carriage. The rod or support 16 is or may be the one heretofore employed as a paper finger support in the Smith Premier machine. Said rod is formed with a longi- F xed to'the rod lc'fhhand end inside the carriage is an arm or bracket :21 which extends torward and curved or oil-set downward terminating somewhat in front of the platen. The arm 21 is provided wi h an angularly shaped erztei'ision streng hening portion The body of the Eland theparallel portion of the e2: e1 ion'are cut out to tit over the rod andengage with the rib the arm being thus keyed to or mounted y on the. rod. it its right-hand end inside the carriage the rod 16 is provided with a 'i'i'irwardly extending arm or support which. is fitted over the rod and keyed to or prevented from turning thereon by the rib 20. The arm 23 is further stabilized by a screw pin 24 which is threaded through the end bar 9 and has a projecting portion engaging in a horizontally enlarged hole in the. arm The arm 23 terminates in line ith the end of the arm 21, the two arms and providing supports for my novel bail or paper controlling contrivance, said supports 21 and 23 being incagable either of turning on or moving lengthwise of the rod 16.

The bail comprises a rod 25 on which are adjustably mounted pressure 'rollers 26. Connected to the rod at its ends, as by screws 27, are short arm 28, the end portions oi the rod 25 being provided with flat faces 25 which iit into holes havin corresponding flat sides in the arms 28, the arms and the rod thus being held in rigid relationship. At their opposite or free ends the arms 28 are rigidly connected by screws 29 to hub or stud portions 30, which at their outer ends receive headed screws 31 which connect the bail to the carriage. The heads of the 7 screws 31 are outside the supporting arms 21 and 23, the screws having shouldered portions which bear in holes in the end portions of the arms and provide pivotal sup ports for the bail, the axis of the bail passing through the axes of the screws 31. The hub or stud portions are formed at their outer ends with rectangular flattened portions provided with two parallel long side: 33 and twoparallel short sides 3i. Eng ing with the flattened portions are springs 35 made of tlat saring metal and shaped in what may be termed generally the hair-pin style, being bent that they are substantially closed or endless. Said springs are loosely supported by the brackets, a1. is or supports 21 and 23, being ar ranged inside said supports and mounted at their rear portions on. headed shouldered screws 36 which are threaded into said brackets. The springs loosely surround the hub portions of the screws 36 and are prevented from inward displacement at the rear by the heads thereof. At the front the shoulders or fianges'lO formed between the portions 30 the end portions with dii and of the studs hold the spring et their supporting arms 21 a Rearward displacement of the sirings is prevented by pins 37 projecting inward i'roni arms 'Eheuppor and lower portions or branches of each spring extend forward in substantial parallelism and engage at their forward onally opposite orners oi the rectangular parts 001... it spring devices for maintaini the bail spring pressure. The upper arm or branch of each spring tern'iinates in downwardly inclined portion w iich covers the associate hub portion 32 giving a finished appearance to the construction and providing a practically closed spring. The part also serves the additional purpose of assist ing to prevent displacement of the spring, obstructing any tendency to work around out of place. The crank arms or side portions :28 oi the bail are provided with inwardly and upwardly extending off-sets 88 which serve as linger pieces for controlling the bail. Arranged outside the arm 23 and mounted on the screw 81 to turntherewith is a stop plate 39 formed with two stop faces i0 and 4-1 adapted for co-operation with a stop pin 49 projecting laterally outward from the arm :23. The stop devices 4:0, a l and cooperate to preventundue rotation of the bail. The stops l0 and .2 positively limit forward movement while the stop ll comes into use to limit rearward swing in case the platen be removed.

Normally the springs 35 maintain the bail in the position shown in Figs. 1 and 2, the arms 28 extendingrearward and slightly upward and the rolls 26 being held in springpressed relation with the platen above the printing line. These rolls in co-operation with the forward front feed rolls 15 maintain the paperin a smooth and taut condition along the entire printing face of the platen. iVhen it is desired merely to insert or adjust paper or work sheets, the bail is swung or pulled forward to the Fig. 3 position, from which it will be observed that at this time the bail is substantially upright and that the platen is sutliciently cleared so as not to interfere with the insertion and adjustment 0;. the sheets. -The bail is maintained in this upright position by the cooperation of the upper and lower branches of the springs 35 with the opposite fiat faces 23a of the hub or stud portions 32 of the bail. In order fully to clear the platen so that it may be entirely exposed and unobstructed for erasing and other purposes, the bail may be swung forward to a substantially horizontal position as shown in Fig. 4, being held in this position by the co-operation of the spring arms with the longer flat faces 33 of the hubs. 'The spring devices yield readily to permit manipulation of the bail,

and behind said springs.

but nevertheless are effective to perform the functions in a highly satisfactory manner.

It will be observed that the springs and the flattened hub or stud members cooperate to provide detent devices for maintaining the bail in either of the two throw-off positions shown in Figs. 8 and I. The springs moreover have the further very important function of neutralizing pressure on the bail pivots since said springs bring substantially equal pressures to hear at diametrically opposite sides of said pivots, the spring branches tending to press constantly inward towards each other. The result is that there is exerted a minimum of friction on the bail pivots due to the springs, causing them in a sense to float, and with a consequent ease and facility of control and operation of the bail itself.

During swinging movements of the bail, and in fact at all times, the arms 21 and 23 are rigid with the platen carriage or frame, being in effect parts thereof. The rod 16 is held by the binding screws 18 and 19 and is also keyed into the right-hand side of the carriage. Thus the rod or support of the arms is rigid on the carriage, and as stated, the two arms 21 and 23 are themselves rigid on said rod. To insure against endwise movement of the arms on said rod 16, said rod is flattened at its ends providing shoulvders at its top and bottom faces, only the top right-hand shoulder 16 being shown. The arm 23 is held or clamped between the shoulders, as 16*, and the platen frame by the screw 19; and it will also be understood that the outer fore-and-aft portion of the eX- tension 22 is also clamped or held by the screw 18 between the left-hand end portion of the carriage or frame and the shoulders on the left-hand end of the rod 16.

It will be observed that by my present invention there is provided a paper bail associated with spring devices which are arranged to minimize pressure on the bail pivots; that the spring devices are arranged at diametrically opposite sides of the pivotal axes so as to neutralize each other in effect; that detent devices co-act with the bail pivots to maintain the bail in two positions, one comparatively slightly removed from the platen to facilitate the insertion of paper, the other position being one further removed to facilitate erasing and the like; that preferably as in the present instance, the detent springs and the pressure-neutralizing springs are the same; and that when the springs are exertingpressure against the bail rolls to hold them against the platen, said springs react against the corner portions of the bail pivots.

While my improved bail has been shown applied to the carriage of a No. Smith Premier typewriting machine, it will of course be understood that said bail is readily adapted to other styles of writing machines; and also that various changes may be effected in the construction of the bail and associate parts without departing from my mvention.

-l/Vhat I claim as new and desire to secure by Letters Patent is 1. In a typewriting machine, the combinatlOllOf a platen, a carriage, a paper bail pivo-tally supported thereon, and spring devices for said bail, said spring devices being arranged to minimize pressure on the bail pivots. y

2. In a typewriting machine, the combination of a platen, a carriage, a paper bail pivotally support-ed thereon, and spring clevices at opposite sides of each bail pivot for neutralizing the spring pressure thereagainst.

3. In a typewriting machine, the combina tion of a platen, a carriage, a paper bail pivotally supported thereon, and hail springs one at each end of the bail, each spring having portions effective at opposite sides of the associate bail pivot.

I 4. In a typewriting machine, the combination of a platen, a carriage, a paper bail pivotally supported thereon, I and bail springs one at each end of the bail, each spring having portions effective at opposite sides of the associate bail pivot, said springs being effective to maintain the bail co-opereratively engaged with the platen and also to maintain it in inoperative position away from the platen.

5. In a typewriting machine, the combination of a platen, a carriage, a paper bail, bail pivots having rectangular hub portions with flattened sides, and hail springs one at each end of the bail, each spring having portions effective on the flattened sides of the associate bail pivots to hold the bail inoperative.

6. In a typewriting machine, the combination of a platen, a carriage, a paper bail, bail pivots having rectangular hub portions with flattened sides, and hail springs one at each end of the bail, each spring having portions effective on the flattened sides of the associate bail pivots to hold the bail inoperative, said spring cooperating with the corners of the rectangular portions to press the bail against the platen.

7. In a typewriting machine, the combination of a platen, a carriage, a paper bail pivotally supported thereon, and hail springs one at each side of the bail, each spring having portions effective at opposite sides of the associate bail pivot, the springs being substantially closed and endless, and loosely mounted on the carriage.

8. In a typewriting machine, the combination of a platen, a platen carriage, a paper bail pivoted on said carriage forward of the platen and co-operative with the front upper side of the platen, stop means for limiting the swinging movement of the bail forward from the platen to a substantially horizontal position, and detent means for maintaining the bail substantially upright when swung "forward away from the platen to a position intern'iediate its normal engaged position and said horizontal position.

9. In a typewriting machine, the combination of a platen, a platen carriage, a paper bail pivoted on said carriage forward of the platen and co-operative with the front upper side of theplaten, stop means for limiting the swinging; movement 0t the bail forward from the platen to a substantially horizontal. position, and detent means for maintaining the bail in a substantially upright position away from the platen, said detent means comprising springs which also co-operate with the bail pivots to minimize the pressure thereagainst.

10. In typewriting machine, the eombiintion of a platen, a platen carriage, a paper bail pivoted on said carriage forward of the platen and. co-operative with the front upper side of the platen, stop means for limiting the swinging movement of the bail forward from the platen to a substantially horizontal position, and detent means for manitaining the bail in a substantially upright position away from the platen, said detent means comprising springs which also co-operate with the bail pivots to minimize the pressure t-hereagainst, said detent means comprising hair-pin springs having parallel branches which act against the corners of rectangular portions of the bail pivots to normally maintain the bail in co-operation with the platen,

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 29th day of April A. D. 1925.

JOSEPH PHELPS.

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