US978902A - Type-writing machine. - Google Patents

Description

v A. G. F.'KUROWSKI {TYPE WRITING MACHINE. APPLICATION rum) APB..13, 1910.

978,902. 1 Patented Dec. 20, 1910.

UNITED STATES PATENT-OFFICE.

ALFRED G. F. KU'ROWSKI, OF NEW YORK, N. Y., ASSIGNOR TO UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent; Patented Dec. 20, 191().

Application filed A pril l3, 1910. Serial'No. 555,274. i

To all whom it may concern: v

Be it known that I, ALFRED G. F. KURow- SKI, a citizen of the United States, residing in borough of Brooklyn, city of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Type-Vriting Machines, of which the following is a specification.

This invention relates to paper-feeding devices for typewrit-ing machines, and particularly to the rod extending lengthwise of the usual typewriting carriage to carry paperfeeding rolls which run upon the platen.

The main object of the invention is to prevent springing of the rod, and the consequent liability of displacement or loss of pressure and elticiency of/the rolls carried thereby. c l v i I provide the carriage with an arm having a bearing engaging thepressure rollcarrying rod at a .point about midway of its ends, whereby to support the rod and prevent fiexure thereof; and I provide for moving said arm to a position of disuse where it will be out of the way when not required, the arm being preferably fold-able against the front bar of the paper carriage.

In the accompanying drawings, Figure l is a plan showing the invention applied to an Underwood writing machine. Fig. 2 is a perspective view of the arm removed from the machine, showing it engaged with the roll-carrying rod. Fig. 3 is a detail side view, partly in section, showing the arm swung to operative position, dotted lines showing its position of disuse. Fig. 4 is a cross-sectional view showing the arm applied to a typ'ewriting machine. Fig. 5 is a detail cross-sectional view, showing the means tending to rotate the roll-carrying rod.

A platen l is ournaled by an axle 2 in Sthc ends 3 of a platen frame mounted on a 4 up and down to enable different types on carriage 41, said platen frame being shiftable the type bars 4 to strike the platen. The

usual front and rear pressure rolls 5 and 6 cooperate with the platen to feed the sheets. A roll-carrying rod7 is firmly mounted in sleeves 7 having grooved journals 7 turning in bearings 8 on'the ends 2} of the platen frame, and extends across the latter. De-

pendingpressure roll-carrying arms 9 equipped with pressure rolls 10 are adjustable'along the rod, by the finger pieces 9 the rolls engaging the cards or other sheets at points adjacent the printing line,to hold'the sheets against the platen. The paper holding rolls 10 are held against the platen by springs 8 on the platen frame which tend to press the rollS into the grooves 8 in the journals 7, and rotate the rod 7, the operative positions of the parts being shown in Fig. 5. The rotation of the rod 7 is arrested by the engagement of the pressure rolls 10 -with the platen, and consequently, the rod tends to bend or flex. A finger-piece 11 on the rod enables the operator to throw off the rolls. An arm 12 is supported on the main carriage 4 and has a bearing 13 fitting over the rod at a point intermediate its ends, said arm operating to support orstiifen the rod and prevent lateral springing -or yielding thereof. The arm 12 is hingedfas at 14, to

a bracket 15 fast on the carriage, and the bearing 13 is open at its lower end to permit the arm to be disengaged from the rod,'to

permit the adjustment of the pressure rollsalong the rod. The rod is sufiiciently yielding to enable it to be sprung down to enter or escape from the slot 13. Said arm 12 is held in either operative or inoperative position by a spring 16, engaging .either of two faces of a knuckle 17 on thearm, through which the pivot pin 14 passes. The bracket maybe braced against vertical. swinging of the rod 7, to enable the rod to be engageillbythe arm without undue strain. The re can, of course, turn freely in the bearing in 3 the arm, which bearing is of sufficient length i to .maintain its engagement with the rod when the latter is shiftedwiththe platen from full-line lower-case position to dottedline upper-case positiomat Fig. 3; the walls of the slot being parallel and fitted-to the rod sufficiently closely for the purpose.

1,, fix

The invention is of especial value in extra "wide carriages, in which the rod 7 is so long in proportion to its diameter as to be relatively weak.

The platen frame Slusually has a roll 20 to run upon a shift rail 21, the latter mounted upon the usual shift frame 22 pivoted at 23, whereby the platen frame and platen are shifted up and down to enable different types to print.

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 typewriting machine, the combinae tion with a platen and a paper-feeding device including a tensioned rod extending across the machine and carrying pressure rolls to engage the platen, of an arm connected to the machine, and releasably engaging the rod intermediate its ends to support the latter.

In a typewriting machine, the combination with a platen and a paper-feeding dejice including a spring-pressed rod tending to rotate, said-rod extending across the machine and carrying pressure rolls adjustable along the rod to engage different widths of paper, of an arm pivotally connected to the machine and releasably engaging the rod to prevent springing thereof and movable to a position of disuse to enable the pressure rolls to be adjusted to either end of the rod.

In a typewriting machine, the combination with a shiftable platen frame and platen, and a paper-feeding device including a rod tensioned to rotate, said rod extending across the platen frame and carrying pressure rolls to engage the platen, of an arm relative to which the plate h frame shifts, and having an elongated bearing, in which is fitted the rod to accommodate the latter when the platen frame is shifted.

4'. In a typeu'riting machine, the combination With a platen frame and platen, and a paper-feeding device, including a rod tensioned to rotate, said rod extending across the platen frame and carrying the pressure rolls to engage the platen, of an arm pivoted to the machine and havinga recess open at one end in Which the rod is loosely fitted.

5. In a typewriting machine, the combination with a shiftable platen frame and platen, and a paper-feeding device including a rod tensioned to rotate, said rod extending across the platen frame and carrying pressure rolls to engage the platen, of an arm having an elongated bearing in which the rod is fitted, and a bracket to which the arm is attached, the bracket being secured to the machine independently of the platen frame and having a brace engaging the machine to resist strain imparted by the rod to the arm] 6. In a typewriting machine, the combination with a platen and a paper-feeding device including a tensioned rod extending tion, and pressure rolls carried by the rod to engage the platen, of a stiffening member secured to' the machine and having a bearing in line with the rod supports to prevent the rod from springing under the strain.

8. .In a typewriting machine, the combination with a platen, a platen frame, paperfeeding mechanism including a rod extending across the machine and mounted in bearings on the platen frame. a spring tending to rotate the rod in one direction, and pressure rolls carried by the rod to engage the platen and arrest the rotation of the rod, whereby said rod is placed under tension, of a supporting member to releasably engage the rod about midway of its ends to prevent tlexure thereof.

ALFRED G. F. KllROlVSKI.

\Vi tnesses K. l uannitnrr,

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