US1564922A - Typewriting machine - Google Patents

Description

Dec. 8,

4 A. E. ZUGELTER TYPEWRITING MACHINE Filed Feb. 6, 1923 ly, so that no ink-impression is made.

1 sion legible.

30 on the ends of the ribbon-shafts.

Patented Dec. 8, 1925.

UNITED STATES ALVIN n. ZUGELTER, or CINCINNATI, OHIO, ASSIGNOR TOUNDERWOQD TYPEWRITER PATENT OFFICE.)

COMPANY, on NEW YORK, N. Y., A coaP'oRA'rIoN or DELAWARE.

TYrnwnrrINe MACHINE.

Application filed February 6, 1923. Serial No. 617,253.

To all whom it may concern I Be it known that I, ALVIN E. ZUGELTER, acitizen of the United States, residing in Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Typewriting Machines, of which the following is a. specification. I

This invention relates to typewriter card guiding and feeding devices, and more particularly to stencil-card guides.

The types usually strike the stencil directis desirable, however, to render the impres I To this end, a ribbon is usually fed between the platen and the stencil.

The impressions are thus inked on the back, i and the writing is made v1sible.

One of the features of the present invention is the provision of efficient ribbon-feeding means. A pair of ribbon-carrying shafts are mounted above the platen, and the ribbon runs from one of them around the platen to the other. The shafts wind alternatively. A common drive-shaft for the ribbon-shafts is loosely mounted at one end for axial tilting movement, and carries a pinion at its free end to be moved alternatively into driving engagement with gears The com mon drive-shaft is driven by pawl-andratchet mechanism, at its relatively stationary end, actuated by the line-spacing mechanism of the Underwood typewriter.

Stationary guides receive the opposite margins of the cards, and serrated feeders on the platen co-operate with s-errated'feedrolls to grip the margins of the cards and feed them. as set forth in the application of Alfred G. F. Kurowski, Serial No. 595,235,

filed October 18, 1922. Means are also provided on the platen for gaging the lower edge of a card as it is inserted, to position it relatively to the platen, so that it will be brought to correct writing position when fully inserted. In accordance with the present invention, such means consist of gaging stops for engaging the card at the opposite ends of its lower edge only,-said stops being located beyond the Writing zone, so that the writing zone is left freeand unobstructed to permit the passage of the ribbon around the platen.

A feature of the invention is the provision, in combination with a work-feeding platen,

of a ribbon passing around the platen, ribhon-feeding mechanism, and means located beyond the'edges of the ribbon for engaging the'margins of the cards and pressing.

the improvements of the'present invention. a

'Figure 2 is a fragmentary plan view, showing the relative arrangement of the ribbon-stencil-card and the card feeding and positioning means' Figure 3 is a vertical longitudinal section on the line 38 of Figure 1, with the I end bracket partly broken away.

Figure 4 is a vertical longitudinal section on the line k4 of Figure 1 on a reducedscale.

tion on the line 5-5 of Figure 1.

Figure 6 is a vertical sectional View taken transversely of the platen in the Writing zone. I Figure 7 is a reduced fragmentary plan view, showing the mechanism for driving the ribbon-shafts.

The invention is shown as applied to an Underwood typewriting machine having a rotary platen 10, mounted in the platenframe 11 of r a traveling carriage (not shown). by a pin 12, mounted on the end plate 13 of the platen-frame 11, playing in a slot 14, in the right end of the platen. A strip of celluloid 15 maybe fixed over the portion of the platen whichrreceives the type-impressions. The platen may be turned by the usual knobs or finger-pieces 16 (one of I which is shown), or by operation of the usual line-spacing mechanism, which comprises a line-space lever (not shown), a

slide 17, a pawl 18, a'ratchet 19 fast upon the platen-shaft 20, and a spring 21 for returning the slide 17.

A pair of transverse rods 22 and 23,

mounted on the end plates 13 and 24 of the. platen-frame 11, have two upwardly-extend- I ing spaced brackets 25 and 26 fixed upon them. Shafts 27 and 28, adapted to have the opposite ends of a ribbon'29 attached to them, are journaled in the brackets 25 and Figure 5 is a vertical longitudinal sec- Rotation of the platen is limited 90 26. These shafts 27 and 28 are provided with driving gears 30 and 31, respectively, adjacent the left-hand bracket 25, and coilsprings 32 on the shafts 27 and 28, between the bracket and gears and 31, frictionally engage the gears 30 and 31, and prevent too free rotation of their respective shafts, and thereby prevent overfeeding of the ribbon 29. The shafts 27 and 28 have collars 33 adjustably fixed upon them for determining their longitudinal positions by engagement with the right-hand bracket 26.

The gears 30 and 31 are arranged to be alternatively driven from the line-spacing mechanism in the following manner: A common driving shaft 34, having fast thereon a driving pinion 35, located between the gears 30 and 31, extends betweenthe bracket 25 and an upwardly-extending bracket-plate 36 011 the end 24 of the platen-frame 11. The slide 17 of the line-spacing mechanism is connected through a link 37 to an arm 38, rotatably mounted on the shaft 34 adjacent the bracket 36. The arm 38 carries a pawl 1 39 which is maintained by a spring 40 in engagement with a ratchet 41 fast on the shaft 34, the arrangement being such that the shaft 34 is rocked each time that the slide 17 is moved rearwardly by the line space lever. A return locking pawl 42, mounted on an adjustable pivot 43 on the bracket 36, is pressed by a spring 44 into engagement with the ratchet 41 to prevent retrograde movement of the shaft 34, to prevent unwinding of the ribbon. A boss 45 on the ratchet and a collar 46 are fixed on the shaft 34 at opposite sides of the bracket-plate 36 at a sufficient distance from each other to permit limited angular movement of the axis of the shaft 34 about the bearing of the shaft in the bracket 36 as a fulcrum. The bearing fits the shaft 34 loosely enough to permit this tilting. At its opposite end the shaft 34 has the pinion 35 fast upon it and located between the gears'30 and 31 on the ribbon-shafts 27 and 28. At this end the shaft 34 is supported in the bracket 25 in a horizontal slot 47 of sufficient length to permit the shaft 34 to be moved to carry the pinion 35 into mesh with either gear 30 or gear 31 to effect a driving connection with either ribbon-shaft, and thereby to cause the ribbon to be wound onto the shaft thus connected. A detentplate 48, pivoted on the bracket 25 and having two arcuate recesses 49 in its upper face beside the forward and rear portions, respectively, of the slot 47', is pressed by arather stiff spring 50 into engagement with the shaft 34 to cause the shaft to be retained at either end of the slot 47 to which it may be moved, and thereby to prevent unin tended disengagement offthe P51101135 from either gear. It will be "seen that, by the mechanism described, the ribbon 29 may ha wound onto either of the ribbon-shafts 27 and 28, and that the direction of the ribbonfeed may be quickly reversed by simply thrusting the shaft 34 from one end of the slot 47 to the other. The movement of the shaft 34 at its left end is insufficient to af feet the operative relationship of the ratchet 41 with the pawls 39 and 42, because of their proximity to the fulcrum about which the shaft is tilted. The ribbon 29 is caused to pass around the platen 10, and is of sufficient width to occupy the entire writing zone.

Between the brackets 25 and 26 the rods 22 and 23 carry a pair of spaced forwardlyextending brackets 51. Each of the brackets 51 carries at its forward end a stationary guide comprising resilient front plates '52 and rear plates 53 for receiving a margin of a stencilcard and guiding it downwardly to initial printing position, and for guiding it upwardly in line-spacing direction. The guides for the opposite margins taken together form a guide-chute. The platen 10 is provided with serrated rings 54 spaced apart to grip the margins of the cards only, and spring-pressed, serrated rollers 55 are provided, one for each ring, to hold the margins of the cards with a gripping pressure'aga'inst the serrated rings 54. The rollers 55 are rotatably mounted on the forward ends of arms 56. Each of the arms 56 is pivoted in aU-shaped portion at the forward end of one of the brackets 51, upon a headed screw 57, which passes through a leg 58 of the U-shaped portion of the bracket-and into the body-portion thereof, the roll-carrying arms 56 having extensions or tails 59 behind their pivot-points. The tail 59 of each arm 56 has secured thereto the lower end of a coilspring 60, the upper end of which coil-spring is connected to a lug 61 on the corresponding bracket 51. The springs 60, by drawing upwardly on the tails 59 of the arms 56, cause the rollers 55 to be pressed yieldingly toward the platen 10 for co-operation with the serrated rings 54 in feeding the stencil-cards. For releasing and applying the rollers 55, a rock-shaft 62, journaled in the brackets 51 and provided with an operating finger-piece 63, carries two cams 64, each formed and positioned to engage and depress the tall 59 of one of the roll-carrying arms 56 when the shaft 62 is rocked in one direction, and to permit itto rise under the influence of its spring 60 when the shaft 62 is rocked in the reverse direction. Rocking movement of the shaft 62 is limited by engagement of a stud 65'on one of the brackets with ears 66 on the corresponding cam.

When it isdesired to insert a card 67 for typing, the platen 10 will 'be turned .to the advanced limit of its movement, that is, to the position shown in Figures 3 and 5, if it does not already occupy that position, and the feebl -rollers 55 will. be cast. eff by the operation of the finger-piece 63. The card 67 may then be inserted with its margins in the chute, formed by the guide-plates 52 and 53, until its bottom edge engages lips 68 upon a pair of gaging stops 69 attached to the platen at Opposite sides of the Writing zone by suitable means, such asscrews 70. These stops 69 insure the proper positioning and aligning of the card 67 with reference to the platen 10. At this point the feed-rollers will be restored to effective position to press the card against the serrated rings 54:. The platen 10 is then rotated until arrested, by the pin 12 and slot 14, to lower the card into the chute. The card will thus be positioned correctly to receive the first line of writing. By arranging the stops 69 to lie outside the writing zone, the ribbon 29 is enabled to pass around the platen Without engaging the stops, and the stops are enabled to function without interference by the ribbon.

The stencil-cards are advanced for writing by the line-space lever which moves the slide 17 rearwardly at each operation. The slide 17 through the ratchet 41 advances-the shaft 34, which, in turn, drives one of the ribbonshafts to bring a fresh portion of the ribbon to writing position.

Variations may be-resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a stencil-cutting machine, a platen having a limited range of movement, cardfeeding means co-operating with the platen to grip a stencil-card along its margins and feed it, a ribbon passing around the platen behind the stencil-card to mark impressions on the stencil material, and means on the 7 ends of the platen, located outside the zone of the platen traversed by the ribbon, for engaging the lower edge of the card to align and locate it with reference to the platen.

2. In a stencil-cutting machine, a platen having a limited range of movement, means for feeding a ribbon around the platen in the writing zone between the platen and the work, gaging means on the platen, outside the writing zone, for locating a card with reference to the platen by engagement with the lower edge thereof, releasable feed-rollers outside the writing zone, co-operating with the platen at the line of writing and arranged to be made effective to cause theplaten to lower the card to writing position after it has been located with reference to the platen by the gaging means, and a stationary chute for guiding the card down to writ ing position with its lower edge substantially separated from the platen.

3. In a stencil-cutting machine, a platen having a limited range of movement, means co-operating with the platen to cause a stenoil-card to be advanced by engagement with the platen as the platen is rotated, a ribbon passing about the platen in the writing zone, and gaging means carried by the platen be yond the edges of the ribbon and movable into position with the platen at the advance limit of its movement to engage the lower edge of the stencil-card outside the writing zone and locate it relatively to the platen, so that it will be correctly positioned'to receive the first written line when the platen has been moved to the retracted limit of its movement.

4. In a typewriting machine, a platen, line-spacing mechanism for advancing the platen, and means for feeding a ribbon back and forth around the platen, comprising a pair of ribbon-shafts, a driving shaft, a bearing for said driving shaft about-which the driving shaft is axially 'tiltable, a member on said driving shaft adjacent the fulcrum-bearing for driving it, connections between said member and the line-spacing mechanism for operating the member, a slot supporting the driving shaft at its opposite end, along which the shaft may be moved in opposite directions to effectdriving connections with the respective ribbon-shafts, and means for retaining the driving shaft at either end of the slot.

5. In a stencil-cutting machine, the combination of a platen, a ribbon extending about said platen for inking the back of stencil material, a pairof gages on said platen, one on each side of said ribbon for engaging the lower edge of a stencil-card and aligning it, and means for guiding said stencil-card down and up in front of said platen in accordance with the forward and rearward movement of said platen.

6. In a stencil-cutting machine, the combination of a platen having a pair of spaced rings, a pair of rollers, one for each ring for pressing a stencil-card against said rings to feed said cardwith said platen, a ribbon extending about said platen between said rings for inking the back of stencil material, a pair of gages on said platen, one on each side ofsaid ribbon for engaging the lower edge of said stencil-card and aligning it, and means for guiding said stencil-card down and up in front'of said platen in accordance with the rearward and forward movement of said platen. i

7 In a stencil-cutting machine, the conr bination of a platen having a pair of spaced rings, a pair of'r-ollers one for each ring for pressing a stencil-card against'said rings to feed said card with said platen, a ribbon extending about said platen between said rings for inking the back of stencil material, a gage oneach of said rings for engaging the lower edge of'said stencil-card and aligning it, and'means for guiding said stencil-card down and'up 111 front of said platen in accordance with the rearward and forward movement of said platen.

'8. In a stencil-cutting machine, the combination of a platen mounted for rotation, means for limiting the forward and rear: ward movement of said platen, a ribbon eX- tending around said platen for inking the back of stencil material, a pair of gages on said platen, one at each side'of said ribbon for engaging the lower edge of a stencilcard and positioning said card for the reception, after said platen has reached its extreme rearward position, of the first line of typing, and a front and a rear guide-plate on each side of said ribbon for guiding said stencil-card down and up in accordance with the rearward and forward movement of said platen, said rear guide-plates having their lower ends spaced above the typing line to permit engagement of said stencil-card with said platen at the typing line.

9. In a stencil-cutting machine, a platenv having a limited range of movement, means co-operatmg with said platen to cause a stencil-card engaged with said platen to be advanced as said platen is rotated, a ribbon extending about said platen in the writing zone, a chute for guiding said stencil-card in front of said platen, and gages carried by said platen at the sides of said ribbon,

co-operating with said chute and movable into position to engage the lower edge of the stencil-card outside the writing zone, when said platen is at the advance limit of its movement, and correctly position said stencil card relatively to said platen to receive the first written line after the platen has been moved to the limit of its retracted movement.

10L In a' stencil-cutting machine, the combination of a platen mounted for rotative movement, a pair of revoluble spools, a ribbon for inking the back of stencil material extending about said platen from one of said spools to the other and movable on the rotation of said spools, means includinga slide for line-spacing said platen and a stencil-card engaged therewith, and additional means operable directly by said slide for advancing one of said spools and feeding said ribbon.

11. In a stencil-cutting machine, the combination of a platen mounted for rotative movement, a pair of revoluble spools, a ribbon for inking the back of stencil material, extending around said platen from one of said spools to the other, behind a stencilcard, and feedable on the rotation of said spools, means including a slide for linespacing the platen, a shaft having a gear connection with one of said spools for advancing it, a lever mounted free on said shaft, a link connecting said lever and said slide for rocking said lever on the move ment of said slide, and pawl-and-ratchet mechanism actuable by said lever for imparting limited rotative movement to said shaft on the moving of said slide to linespace said platen.

12. In a stencil-cutting machine, the combination of a platen mounted for rotative movement, a revoluble spool having a gear directly associated therewith for rotating said spool, a second and similar spool and gear, a ribbon for inking the back of stencil material, extending about said platen from one of said spools to the other and feedable on the rotation of said spools, means including a slide for line-spacing said platen, a shaft mounted for rotary and limited lateral movement and having a gear thereon for meshing at one limit of lateral movement with the first-mentioned gear and at the other limit of lateral movement with the other gear, and means actuable on the movement of said slide in the line-spacing operation to impart limited rotation to said shaft, to the gear thereon, the gear meshing therewith and the associated spool for feeding said ribbon;

ALVIN E. ZUGELTER,

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