US1248346A

US1248346A - Type-writing machine.

Info

Publication number: US1248346A
Application number: US10467816A
Authority: US
Inventors: Alfred G F Kurowski
Original assignee: Underwood Typewriter Co
Current assignee: Underwood Typewriter Co
Priority date: 1916-06-20
Filing date: 1916-06-20
Publication date: 1917-11-27
Anticipated expiration: 1934-11-27

Description

A. G. F. KUROWSKI. TYPE wnnmc MACHINE. APPLICATION FILED JUNE 20. I916- Pa'bented Nov 2?, 1917.

2 SHEETS-SHEET I INVENTOR:

WITNESSES:

A. G. F. KUROWSKI.

TYPE WRITING MACHINE.

APPLICATION man JUNE 20. ms.

Patented Nov. 27, 191?.

WITNESSES: -INVENTOR:

. v%%%WM/@ mlmm mww EUROWSKI, F BBQOKLYN, NEW' YORK,

A$SIGNOR TO UNDERWDOLD TYPE- COMPANY, OF HEW YORK, N. Y., A UQRPOEATION OF DELAWARE.

TZlld-WRITING MACHKNE.

Specification of Letters Eatont.

Patented Nov. 2?, lldlll'to Application filed June 20, 1916. Serial No. 104,678.

To all whom may concern:

' Be it lrnown that l, A rline Gr. F. Knnowsari, a. subject of the German Empire, residlag in Brooklyn borough, in thecounty of Kings, city and State of New York, have invented certain new and useful Improvetalents in Type-Whiting Machines, of which the following is a specification.

This invention relates to typewriting ma- .chines in which a platen is mounted on a letter-feeding carriage, and certain features thereof relate particularly to machines in which the platenis shiftable up and down on the carriage in a direction transverse to the letter-feed travel, to different case positio-ns.

An object of the invention is to provide suitable cushioning means between. the platen and the carriage, to cushion the platen when the carriage is suddenly areither in returning it for commencing a new line of writing, or when the carriage is permitted to run forward until arrested by a stop, as in tabulating operations. a When the carriage and the platen are suddenly arrested, there is a tendency for the workpieces on the platen tocreep lengthwise thereof, owing to inertia, and although this creeping may be very. slight at each in dividual stoppage of the carriage, the result i cumulative, and may throw the work eat of adjustment to an objectionable dew in the course of typewriting a sheet. iii ltjion provides means whereby pla during the normal letter-feed emen's the carriage, is firmly held ainst endwise shake or movement relative to the carriage, while permitting the platen .J to yield slightly when the carriage is suddenly arrested, thereby avoiding said creeping of the work on the platen. Such means may comprise a stifl' spring or buffer, which may also form a guide, mounted on the carriage to engage in a guideway on the platen frame, permittingthe platen to shift to difplaten frame. The stop-plate may be accured to the carriage frame by a screw extending through an elongated slot in the plate to permit adjustment of the stop. Said plate may be provided with an offset portion, to receive an adjusting screw threaded through said ofi'set and having its end abutting the carriage frame. Said adjusting screw, which may extend in the direction in which the platen shifts, permits a fine adjustment of the stop and serves to positively hold the stop-plate against displacement by the platen frame striking thereagainst.

Other features and advantages will here inafter appear.

In the accompanying drawings,

Figure l is a side elevation of an Underwood typewriting machine with the present invention appliedthereto, many of the parts of the machine being omitted.

Fig. 2 is a fragmentary front perspective view of the machine.

ferent case positions, while holding the platen a ainst endwise movement relative to the carriage, except as such endwise movement is permitted by the resiliency of the guide. Said guide may yield slightly in the direction of the carriage travel or in the reverse direction, when placed under tension by the momentum of the platen as the carriage is suddenly arrested.

so A further feature of the invention relates Fig. 3 is a perspective view showing a resilient guide on the carriage and a slotted bushing on the platen frame in which said guide moves, the parts being separated to show the construction.

Fig. 4: is a part-sectional front elevation showing a platen frame guide and stop and their relation the platen when the latter is in lower-case position.

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

The roller platen is fixed to the platen axle 11, journaled in the ends of a platen frame 12, mounted on the carriage 13 and shift-able up and down thereon to upper and lower-case positions, to enable the upper and lower-case types 14 and 15 to print at the platen. The types are carried on type-bars 16, fulcrumed at 17, to swing upwardly and rearwardly to cause the types to strike against the front face of the platen. The type-bars may be actuated by keys 18 on key levers 19, fulcrumed on a rod 20 and connected through bell-cranks 21 to the type-- fill llllll the usual escapement mechanism, actuated by the type-bars through the usual mechanism (not shown). The machine may also be equipped with tabulating mechanism comprising a key orkeys operable to release the carriage from the control of the escapement mechanism, and allowing the carriage to run forward until arrested by a tabulatorstop.

The platen frameand platen are shiftable to upper-case 'osition by depressing shiftheys 25 on sliif t key levers 26, fnlcrumed on thclrod 20 and having upstanding arms 2?, to swing a shift frame 28 about its fulcrum 29, and thereby cause a-shift-rail 30, forming part of said shift frame, to lift the carriage. The connection between said rail 30 andthe platen comprises a 1'01131 on the platen frame, arranged to run on said shiftrail during the travel of the carriage. The platemframe 12 is supported and guided .in its case-shifting movements by rock arms 32, fixed to and extending forwardly from a rock shaft 33 on the carriage, the forward ends of the arms 3:2 beinghooked to receive gudgeons or studs 34% fixed to the platen frame.

threaded openings to receive adjusting r the front vertical faces of supporting blocks or frame-pieces 38, which form part of the carriage frame. The stop-plates are secured in adjusted position by clamping screws 39, which extend through slots 40 in the stop plates, said screws being threaded into the frame-pieces 38 to clamp the stop-plates thereto. The slots 40 are vertically elongated to permit adjustment of the stop-. plates.

The lower ends 41 of the stop-plates are bent rearwardly to extend beneath the blocks 38, said ends being provided with screwscrews 42, the upper ends of which project into sockets 43 in the carriageframe. The adjusting screws 42 assist in accurately adjusting the stop-plates 37 when the clamping screws 39 have first been loosened, after which the clamping screws 39 are set up to securely ,hold the stop-plates in adjusted the screws 39 can be relied on tofprevent.

downward displacement of the-stops.

Endwise movement of the platen in the platen frame may be prevented by the hub 44 of the platen abutting against the platen frame end, and by the hub 45 of a hand-' wheel as abutting against a bushing i7 secured to the platen frame and in which the platen axle 11 is journaled. Endwise move 'ment or shake of the platen frame and platen in the carriage is prevented by a guide 48, mounted on the carriage and engaging in a guideway 49, formed by a rabbet or slot in the bushing 47. The vertical sides of the guide 48 may fit between

shoulders

50 and 51, formed respectively by the inner end of the slot 4-9 and the inner end of the hub 45,

thereby preventing relative movement of the guide 48 and the platen, while permitting the platen frame and the platen to shift up and down freely relatively to said guide.

The guide-plate 48 is connected to the ham-apiece 38 by means of arms 52 extendii fcrwardly from the guide-plate on opposite sides of the frame-piece 38 and secured to the latter by screws 53 extending through elongated slots 54 in said arms and threaded into the frame-piece. Said slots permit forward and rearward adjustment of the guideplate.' The guide-plate 48 may be spaced a substantial distance from the rear face of the frame piece 38, and is made of elastic or springy material to enable it to yield slightly in a direction lengthwise of the platen under the force applied thereto by the inertia or momentum of the platen, when a sudden blow is applied to the carriage. This occurs when the carriage is suddenly arrest-ed, which may take place either'in returning the carriage to position for writing a new line, or when thecarriage is permitted to run forward under the power of its driving spring until arrested by a stop, as in tabulating. The guide-plate 48 thus serves as a buffer or cushion be tween the carriage and the platen, preventing jarring or too sudden stoppage'of the platen, which is particularly useful in reventing the work-sheets on the platen om creeping or bein' moved lengthwise of the platen. The gui e-plate 48, however, is of suiiicient stifiness to serve as' a practically rig d connection between. the carriage and platen during the letter-feed movements scope of the inventin,and portions of-the rovements may be] used without others.

i a'vin'g thus described my invention, 1-

' poses, spec Vamatr oat-my a resortedtoflwithinthe claim 1. In a typewriting machine, the combi- 1 nation with ai-carriage1 having a letter-feed travel, of a platen'mountedonithe carriage toftravel therewith, the platen being capable of a movement in either endwise directionrelative to the carriage in letterdirection, and. a single cushioning 5' means for normally holding the platen in an intermediate position with respect to its movement relative .to the. carriage, said cushioning means serving to cushion the platen when a sudd'enblow is im'partedto the carriage. v u

2. In. a typewrlting machine, the combi-- nation with a carriage having a letter-feed travel, to diflerent case travel, of a platen mounted to shift thereon in a direction transverse to the letter-feed gfiition's, and means on said carriage for gui g the platen relatively thereto in its case-shifting movements, said guiding means yieldable in the direction'of the carriage travel and serving as a cushion between the platen. and carriage when thelatteris subjected to ashock. 3. In a typewriting machine, the combiyield suficiently for the fpurframe and provldin nation with a carriage, of a platen frame, a platen journaled therein, said platen and 4 frame .shiftable transversely to the direction of carriage travel, to difierent case positlons, and a resilient guide by which the platen is guided in its case-shifting move ments and normally held against movement relative to the carriage 1n letter-feeding 'dlrection, said. guide forming a butter, or

"cushion, between thezplaten and carriage,

permitting the platen to 'eld in the direction of the carriage trave 4. In a front-strike typewriting machine, the combination with a carriage having a letter-feed travel, of a platen frame, a platen having an axis journaled in said frame, a bushing secured to the platen a bearing for the platen axle, 'said bus ing having aguideway formed therein, a guide-plate mounted 'onthe carriage in position to enter said guideway, and means for shifting the platen andplaten frame up and down on the carriage-to difi'erent case positions, said guide-. plate serving to normally guide the platen in its case-shifting movements and preventing endwise movement of the platen on the carriage, said guide-plate having a resilient connection with the carriage to form a cushion permitting the platen to yield relatively to the carriage when the latter is suddenly arrested.

ALFRED G. F. KUROWSKI. Witnesses;

ARTHUR A. Jomvson, Enrrn B. Linear.