US1249317A - Type-writing machine. - Google Patents

Description

L. D BflOUGHTON. WPBWRITING MACHINE- APPLICATION FILED JUNE 13. 1916-.

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LUBROUGHTON'.

TYPE WRITING MACHINE.

APPLICATION FILED JUN-Z13, I916.

Patented Ma. 11, 19W.

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lhYllllEAN.D. BROUGHTOTT, 0F NJEWINGTON, CONNECTICUT, ASSIGNOR T0 DERWUQD TYPEWBTTJEE COMPANY, 015' NEW YORK, N. Y A CORJPGBATTON 0F JDELA'WE.

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To all whom it may concern:

Be it known that T, LYMAN D. Bno'oen- TON, a' citizen of the United States, residing in Newington, in the county of Hartford and State of Connecticut, haveinvented certain new and useful Improvements in Ty e- Writing Machines, of which the'follow'ing is a specification.

This invention relates to means for holding work upon the platen of a typewriting machine, particularly a rotary platen; certain features of the invention especially platen that is shiftable to different case positions. More specifically the invention relatesto a machine having work-holding devicesfwhich may comprise rolls arranged perpendicularto the platen, caused to bear against the platen at the printing line, and to roll thereon as the carriage, moves in letter-feeding direction.

A feature of the invention relates to the improved means for causing pressure of the work-holding rolls against the platen and enablin the pressure to be readily removed. I

When the machine is used with wide sheets of paper, or sheets of ordinary width it may not be desired to have the work-holding rolls bear against the work, especially in case carbon copies are being made, because the pressure of the rolls would be apt to produce a smudging of the carbon copies.

n practising this feature of the invention, each of the work-holding rolls, which may be located on opposite sides of the printing point, may be mounted to rotate on an arbor or spindle which, in turn, 1s mounted to swing on a rock shaft to carry the rolls to and from the platen. Each roll is held against the platen by a fiat spring, which may be secured to a bracket on which said rock shaft is mounted. The spring is nor- I mally arranged to hold the roll against the platen, but movable to an inoperative position by rocking the rock shaft by means of a handle projecting therefrom, thereby specification of Letters Patent. 'atelnitrefl Dee. ill, T'lllll'l't Application flied June 1%, 1M6. Serial No. 103,380.

theplaten is in upper-case position, should accidentally depress a work-holding roll while the platen still, remains in upper-case position. An attempt to lower the platen while the roll is in such depressed position, might cause the upper end of the roll to dig into the platen, and act as a pawl or holding 'means to hold the platen in its upper-case position. To overcome this difliculty, the

might otherwise occur if the operative, when upper ends of the rolls may be flared or enlfiged and shaped to prevent them from thus digging into or gripping the platen or the work thereon.

Other features and advantages will hereinafter appear.

In the accompanying drawings, I

Figure 1 is a front perspective view of aportion of an Underwood typewriting machine with the present invention applied thereto.

Fig. 2 is a front elevation, showing the work-holding rolls and their relation to the platen whilethe latter is in upper-case position. f

Fig. 3 is a View, showing a work-holding several parts bein disconnected.

roll, a scale plate and associated parts, the v Fig. 4 is a sectional elevation of one of the work holding rolls, the parts being in their normal lower-case operative position.

Fig. 5 is a similar view, butwith the roll and platen in upper-case position.

Fig. 6 is an elevation of one of the rolls, and also showing in section the rock shaft in position to hold'the spring off the roll.

Fig. 7 is a sectional elevation of the machine, various parts being omitted.

The revoluble platen l0 is rotatably mounted in a platen frame 11, shift able to upper and lower case positions on the carriage 12, which runs on front and rear guide rails 13 and 14. Type-bars 15 are pivoted on a fulcrum 16 on a stationary type-bar segment 17, to swing upwardly and rearwardly to the front face of the platen, to

keys 24: and 25, fulcrumed on the rod 22 and having upstanding arms 26 to actuate the platen-shifting frame '27 comprising a rock shaft 28. The shift frame 27 also co'mprises a shaft rail 29, on which runs a roll 30 on the platen frame. When a shift key is depressed, the connected arm 26 thereof swings the shift frame 27 about 28 as an axis, thereby causing therail 29 to lift the platen into position for the upper-case types 18 to print thereon.

The carriage may be driven in letter-feed direction by the usual spring drum (not shown), the letter-feed movements being controlled by escapement mechanism comprising an escapement Wheel 31 driven by an escapement pinion 32 which runs on a rack 33 on the carriage. The rotation of the escapement wheel is controlled by escapement dogs 34 on a dog rocker, pivoted at 35 and actuated by a universal bar 36, which is moved rearwardly at each type stroke by a heel 37 on the actuated type-bar.

The platen may be rotated to line-space the work by means of a line-spacing mechanism (Fig. 1) comprising a linespacing lever 38 operable to move rearwardly a slide bar 39, on which is mounted a pawl l0, to drive a line-space ratchet wheel 41 on the platen axle, and thereby rotate the platen; The platen may also be rotated in either direction by the usual hand wheels 42, secured to the ends of the platen axle. Work-sheets may be introduced to the machine by placing them on the paper shelf 4:3 behind the platen and then rotating the later to advance the sheets around the underside of the platen between the same and the rear and front feed rolls 44 and 45, respectively, and upwardly past the printing line a-b.

The mechanism above described may be the same as that common to the commercial Underwood machine.

For holding cards, envelops, or other work-pieces, there are employed rolls 4:6 in

front of the platen adjacent the printing point and held against the work-piece by spring pressure, so that the work is held closely against the platen at the printing point. 'These rolls 46 may be located on opposite sides of the usual center type guide 47, the latter being mounted on the type-bar segment 17. The rolls bear upon the visible side of the platen at or adjacent to the printing line, with their axes perpendicularto the platen axis. I

These rolls or card holders may be located between the inner ends of the scale plates or wings 48, the upper edges 49 of which bear line on the platen when the latter is in lowercase position and serve as gages to indicate the position of the printing line on the worksheet, said wings also having the usual scale markings at letter-space intervals along the indicating edges 49. The wings are mounted to swing on pivot rods 50 toward and from the platen and are normally held with their edges 49 bearing against the platen or workpiece by means of coil springs 51.

The rolls &6 are rotatably mounted on spindles or arbors 56, each of which forms part of a swinging frame 57 mounted to rock on one of the rods 50, to permit the rolls 46 to swing to and from the platen. The rods 50 constitute rock shafts mounted to rock in brackets 52, for a purpose which will presently appear, the brackets 52 being mounted on the type-bar segment 17. Each of the swinging frames 57 is bifurcated to.

to a bracket 52, extend upwardly past the rock shafts 50 and hear at their upper ends against the 'front faces of the frames 57, thereby holding the rolls 46 against the platen. Each rock shaft 50 has a cut-away portion 60' to accommodate the spring 59 and forming flat surfaces 61 and 63. When the rock shaft is in the Fig. 1 position, the flat 61 faces the spring, and preferably clears the spring, so that the latter may press the roll against the platen. Each rock shaft 50 is provided with a forwardly-projecting handle 62, which may be swung downwardly to rock the shaft 50 to the Fig. 6 position, and cause the flat or cam 63 thereon to engage the spring 59 and swing it forward out of contact with the roll-carrying frame 57. The pressure of the roll against the platen is thus removed, permitting the roll to swing freely away from the platen through a limited distance, as may be desirable in manifolding or other work inwhich it is preferred not to use said rolls. Thus, as indicated, in Fig. 6, any desired number of work-sheets 78 and interposed carbon sheets 79 may be placed on the platen without the pressureof the spring being a'p lied thereto.

11 order that the card-holding rolls 46 may move freely over the work-piece when the carriage moves in letter-feed direction,

or in the ,opposite direction, without proea er;

lindrical sleeve or roll 46 and the spindle or arm 56. Thebearing balls are held in a cage or spacer 67, which surrounds the spindle or stem .56, and is permitted a limited up-and-down movement relative to both the roll and its spindle as said roll moves up and down. The parts are shown in Fig. 4 in their normal lower-case position, in which the roll 46 is at its lowest position determined by the inturned flange 68 at the lower end of the roll bearing against the frame 57 at the base of the spindle 56. To limit the downward'movement of the cage 67 the spindle 56 is provided with a shoulder 69 on which said cage rests. As the platen is shifted from the lower-case to upper-case position (Fig. 5), the roll 46 moves upwardly on the spindle -56, rolling on the bearing balls, which also roll upwardly on said stem to the Fig. 5 position. A screw 70 threaded into the upper hollow end of the stem 56 limits the upward movement of the cage 67, which, in turn, provides a stop to limit the upward movementof the roll 46.

The card-holding rolls 46 comprise the roll portions which run upon the platen, and the ball-containing barrel portions, these portions being separated by the line 46, Fig. 4. The barrel portions extend downwardly a considerable distance below the printing line and are tangent to the platen, and thereby may provide guides for the leading edge of a work-piece as said edge is advanced beyond the front platen feed roll 45, so that the Work-piece is guided to the platen at the printing line and gripped between the platen and the upright rolls 46. The work-piece is guided and supported above the printing line by rolls 71, arranged to overlie the side margins of the Workpiece and hold it against the platen. Said rolls 71 may be carried by spring fingers 72 pivotally mounted on a tie rod 73 of the platen frame, said spring fingers being normally held in operative position by springpressed detent rolls 74, which engage in a groove in the rod 7 3. This construction permits said fingers, with the rolls 71, to be swung rearwardly away from the platen, and also permits said rolls to be shifted V lengthwise of the platen to adjust them to a work-piece of any width or at any position lengthwise of the platen.

The rolls 46 hold the card or other workpiece firmly against the platen at the. printing point, and as they roll on the platen was without substantial friction or drag, they have no tendency to displace the work, but,

on the contrary, hold it firmly to the platen,

and thus prevent any displacement or shifting of the work over the platen surface. The rolls are effective to holdthe work not only during the travel of the platen lengthwise, but also during its case-shifting movements.

An important function of the rolls 46 is to hold the card or work-piece securely while being written upon close to its bottom mar- 75 gin, particularly where said writing involves case-shifting movements of the platen, and to hold the work firmly against the platen at the printing point when the bottom edge of the work-piece temporarily overlies a wing 48, as may sometimes occur. Thus, for example, as shown in Fig. 2, the card 75 has been carried upward, so that its bottom edge is very close to the printing line. This view shows the platen in upper-case position and the rolls 46 moved upwardly with the platen and work-piece. If now the platen is dropped to lower-case position, the lower edge of the card 75 may engage over the outer surface of the wings 48, because the edges 49 bear directly on the platen. The rolls 46 being between the inner upright edges 7 6 of said wings and the printing center, are effective to hold the card firmly against the platen at the printing point, notwithstanding the fact that the card beyond said rolls may be held outwardly a slight distance by the wings. When the platen is moved lengthwise, to carry either side edge of the workpiece toward the printing center, so as to pass beyond the underlying wing 48, said edge will be pressed against the platen by the adjacent roll, and the card will, when the platen is moved in the reverse direction, be guided beneath said wing.

When the platen is rotated by the linespacing mechanism, the work-piece 75, being held against the platen, is carried therewith for line spa'cing it in the usual manner, but the position of the rolls 46 remains 1111 changed. That is to say, during the linespacing operation, the work-piece is shifted relatively to the rolls 46, so that the rolls'are positioned to bear on the work at the new printing line.

Although the feed rolls 46 normally move up and down with the platen during the case-shifting movements, yet said rolls may at times be accidentally moved downwardly by the operative while the platen is still in upper-case position. In such event, the upper edge of the roll would be in such position relative to the platen that it might catch thereon or dig into the platen when .an attempt was made to lower the platen unless 125 some provision was made-to prevent such interference. .To avoid this objection, the upper end of each roll 46 is flared or provided with an annular enlargement or ring 77, the platen-engaging surface of which is 130 preferably rounded. With such construction, the roll is prevented from accidentally catching the platen or work-piece.

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

' Having thus described my invention, I claim: p

1. In a typewriting' machine, the combina- 11) tion witha rotary platen, of a work-hold ing roll extending transversely of the platen and arranged to bear thereon along the printing line, said roll and platen relatively shiftable in a direction transverse to the i platen axis, said roll having an annular enlargement providing means to prevent the roll from catching on the platen during said relative shifting of the roll and platen.

2. In atypewriting machine, the combination with a rotary platen, of a work-holdin roll arranged to bear against the platen, anfii a spindle on which said roll is mounted, the platen being shiftable to upper and lower-case positions, said. roll shlftable on its spindle to move with the platen, and also shiftable downwardly on its spindle when the platen is in upper-case position, said roll having at its upper end an enlargement formed to prevent said end of the roll from catching the platen (at a shifting movement thereof or hindering a free relative upanddown movement of the platen and roll.

3. In a typewriting machine, the combination with a roller platen, of a work-holding roll extending transversely of the platen,

a support on which said roll is mounted to swing toward and from the platen, a fiat spring arranged to hold the roll against the platen, a rock shaft, and means thereon to to engage said spring when the shaft is rocked to one position'and hold the spring in position to remove the pressure of said roll.

from the platen;

4. In a typewrlting machine; the combia5 nation with a roller platen, of a work-holding roll extending transversely of the platen,

a support on which said roll is mounted to so of the platen, a swinging frame comprising a spindle on which said roll is mounted to rotate, a rock shaft on which said frame is mounted to swin toward and from the platen for moving t e roll to and from the at platen, a spring bearing against the swinging frame to hold the roll against the platen, means to rock said shaft, and a cam on said rock shaft to lift the spring and remove the pressure of said roll from the platen when the shaft is brought to one position.

6. he typewriting machine, the combination with a rotary platen, of a work-holding and feeding roll extending transversely of the platen, a swinging frame comprising a spindle on which said roll is mounted 76 to rotate, a rock shaft on which said frame is mounted to swing toward and from the platen for moving the roll to and from the platen, a support on which said rock shaft is mounted, a flat spring secured to said sup- 80 port and extending therefrom past the rock shaft and engaging the swinging frame to hold the roll with a yielding pressure againstthe platen, means to rock said shaft, and a cam on said rock shaft to move the spring out of roll-holding position.

7 In a typewriting machine, the combination with a roller platen, of a work-holding roll extending transversely of the platen and arranged to bear against the platen, a swinging frame comprising a spindle on which the roll is mounted to rotate, a stationary support, a rock shaft journaled therein and extending parallel with the platen, said swinging frame mounted to to swing on said shaft to move the roll to and from the platen, a flat spring secured to said support and extending therefrom across the rock shaft and bearing against said swinging frame to hold the roll with a yielding pressure against the platen, said rock shaft having a cut-away portion through which the spring extends and providing a clearance between the spring and rock shaft when the latter is in one position, and a fiat to bear against said spring and hold it free fromsaid swinging frame when the rock shaft is in another position, thereby taking the pressure of said rolllofi' from the platen and permitting the roll to swing freely away from the platen.

8. In a typewriting machine, the combination with a rotary platen, of a stationary support, shafts mounte on said support. scale plates mounted onsaid shafts and having edges to bear againstthe platen adjacent the printing line at each side of the printing point, work-holding rolls extending across the platen and arranged to bear thereagainst at the printing line, said rolls mounted to swing about said shaft as axes to and from the platen, springs to hold the rolls against the platen, means to move said shafts, and means on said shafts, operated by said movement thereof, to remove the pressure from said rolls.

9. In a typewriting machine, the combination with a rotary platen, of a su port, a shaft mounted on said support para lel with the platen, a scale plate mounted to swing 130 on said shaft and having an edge extending along the platen at or adjacent the printing 7 line, a work-feeding roll, a spindle carryalong the platen at or adjacent the printing line, a work-feeding roll, a spindle carrying said roll and mounted to swing on said shaft to move the roll toward and from the platen, a spring to hold said roll against the platen, means to rock said shaft, and a cam 'on said shaft operable when the latter is rocked to repress the spring and thereby remove the pressure of said roll from the platen.

' LYMAN n. BROUGHTON.

Witnesses:

W. M. KYOCKMAN, FRANK A. COOK.

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