US974335A - Type-writer key and type-bar mechanism. - Google Patents

Description

J. ALEXANDER.

'mn WRITER KEY AND Tm: BAR Mncnmxsu. APPLIDATION'FILBD 00T. 8, 1908. BHHIIWED HAY 26, 1910. 97413335,y Patented Nov. 1, 1910.

2 SHEETS-SHEET 2.

ALEXANDER., or BROOKLYN,'NEW '1r-omg, Assiettes. BY 'iaEsfNriiiss-iennhirs,

a .0F ONE-HALFTQ EMMA*SCHEUfSCHoRcrilgjor BUFFALO;TNEWQYORK.'.if

g y `TYPnWRITEnKEYjANnriferi-BAR `1yr15Ciii/iuitgaatjf S'pecic-ation'of Iietters Patent.- if" Patented N0v 1 192ML conunutien'ofappnction serial No. 219,725, ined August s, 1904. .T'is ppncatipn area october s, 190s.

Serial No. 456,804. Renewed May 26, 1910. SeratNo. 563,623.

To whdm haai/concern.

` itlknown that I, Jessi: Auen-innert, a

citizen of tliejUnited States, residing at Bronklymjeountyffof Kings, State of New York, have invented certain new and useful Improvements in TypeVriter Keys and Type-Bar Mechanism, of which the followinv is a full, clear, and exact description.

yly invention relates to improvements in typewriters, and particularly to a key and type bar construction adapted for use with i y whatmay be termed a. front strike machine.

, ries of -typebars'on the are of a! circle in .The object oftthe invention is to provide A'aonstruction which is simple and etlicient in its operationl l'the partsbeiner so assembled that they `may be disassembled readily when desired.Y Itis desired also to perfeet the'touch that it shall be elastic and as nearly uniform throughout the entire keyboard as lpossible.

The -`invention. consists in mountingaI sefrontof and below a revoluble platen. These typebars are operated by a series of key.- bars which Vare, pivoted below and may be arranged as,in`the usual standard keyboard.

- These keys and typebars vare connected. by

intermediate 'mechanism consisting ofa series of pivoted L-shaped4 levers, the upperV ends of which are connected to the type bars and a series of wtilting levers pivoted in vfront and lconnected to the horizontal arms j ofthe L-shaped levers and to the rear of the key levers.-

The construction and operation will be more readily understood on an inspection 'of the accompanying drawing.

-Figure 1 1s a. side elevation of one unit of mechanism showing the supports in crosssectionand the frame of the machine and `platen and also 'the mechanism in the Vprint I vmg Vposition dotted. Fig. 2 is a plan view of the supporting,niemberstogether with three u nits of mechanism, the left-hand end of the support being broken'- away." Fig. 3

; is a side elevatioirof two units of the mechanism at the outside edge ofthe series. big.

4 is a front elevation of the same.

1 represents a, typebar which is pivotally carried by the typebar plate 2. 4

3 iszthe pivot rod on which the series of typebars are pivpt'cd.r The typchars are provided with shoulders asy at 4 for engagementwith the universal bar which lits into the rear of the typebar plate 2. yThis universal bar operates the usual carriage feeding mechanism and ribbon operatingr mechanism as is commonin machines of this general character. l

6 indicates a, platen. l

.7 is one of -a series of key-levers which has a pivot rod S. arried by the slotted supporting beam 9.

10 is .an Lshaped leverp'ivoted on the rod 11 carried by the slotted back beamlq The upright armjof the lever isv connectedby a linkl to therear end of the type1 bar 1.

' 14 is ai tilt-ing lever supported byl the pivotrod 15 which is carried by the slotted vbeam 1G. This tilting lever lis slotted at both ends andengages with Ipins17 and 18 carried by the L,-shaped lever and the key lever, respectively.

19 indicates the gasket` or mat against which the'type bars rest.l Y The niaclnne to which this construction' is adapted to be 'particularly used is of the single shift classy ml which two type are carried by asingle type ,bar and the platen is moved by some sultable mechanism from the lower toythe upper case position. i X

, 2Q is a lowerl side frameof` the machine forming a support for the beams 9, 12,16.

i Then the. front end of the key lever 7 is depressed, it raises the front end of the tilt? ing leverl 14"'and thus depresses the frontend olf-the L-shaped`lever -10 so as to throw the u ri ht arm 'forward and bv means of the i `link 13 raise the type bar 1 lto the printing osition. The connections between these evers is particularly advantageous in operation since although there is no great lost motion. there is nevertheless sutlicient play in the joints and byIreason of the compresse bility of thel link 13 to insrre4 an elastic rather than a rigid touch. L

The intermediate L-shaped levers 10 vary 'in length for the units from thecenter t o ward` the'onter edgesv of the machine 1n.

order to more effectually land pro erly connect them to the ty bars. It Wi l benoted on inspection of the upright arm of lever 10 is such that the link 13 passes lig.- 1 that the length of` from the position downwardly inclined toward the forward end to a position'slightlyinclined upwardly as it passes from the position of rest to the printing position. Theangleof connection is such as to give the ful operative pressure be- -tween the parts in operation. f All of the key levers being 'pivoted on the beam 9 can be removed from the-machine at any time vby simply removin the beam 9. In a similar manner all the ti thig'levers 14 being pivted on the beam 16 may be removed from the frame of the machine.

unhung by removing the beam 12.

connection between the tiltin Similarliy the L-shaped intermediate levers being al pivoted to the beam 12 may be removed at one timev when the typ'e bars are levers and the key levers and intermediate evers is such as to permit of the removal of any one of these sets of parts withouty interference with thel others. The key levers and the intermediate levers being slotted and thus engagingtheir pivots in aremovable or detachable manner,

render it very easy 'to take out or replace a singlic lever when desired.

' at I claim is:'

1. A key and type bar constriiction for 'typewriter including a pivoted type bar havingl a 'rearward and downward extension t erefrom, an L-shaped intermediate lever to the rear thereof, having an upright armand a horizontal" bar, `the upright arm beingconnected'by a link to the rearward extension of the t-ype baradapted to exert an upwardly vinclined thrust thereon, a pivotedkey lever, and a tilting lever pivoted to thel frame connecting in the, same plane the key lever and the horizontal arm of the intermediate lever.

2. A key and type bar construction for a typewriterincluding' a pivoted type bar having. a rearward and downward extension therefrom, a pivoted key lever,l a pivoted L- sha ed intermediate lever, a link connecting .sai lever to the t pe bar adapted to exert an jupwardlyA inc ined thrust thereon, a`

pivoted tilting lever connecting in the same piane said levert'o the key lever,.a removable typewriterinelu ing 'a pivoted type bar' am forming a support for the pivot of 'said intermediate lever, anda beam forming a sup ort for the pivot of said tilting lever.

3. -key and t pebar construction for a havin a rearward' and downward extension there om,n 'a pivoted key lever, a pivoted L-shaped intermediate lever, a link'co'nnectsaid intermediate lever to the bar an ada. ted to exert ali-upwardly inclined thrust Vt ereon, a pivote'd tilting lever connecting inthe same plane'said ever to the The.

securing. said tilting lever key lever, a beam forming lli-.support for the pivot of said keylever, removable means or securing said key lever pivot beam to the frame of l the machine and a beam forming a support for thepivot of said'tilting lever.

having a rearward an downward extension therefrom, fa pivoted key lever, .a .pivoted L-shaped intermediate lever, a link connecting said intermediate lever to the type bar and adapted to exert an upwardly inclined .thrust thereon, a tiltingy lever connecting in the same plane said lever to the key lever,

a beam forming asu port for'the Vpivot of said tilting lever, an

frame of vthe machine.

5.' A key and type bar construction for a typewriter comprising a series of type bars pivoted on 'an arc of a'vertical circle,

removable means for pivot beam vto the each type bar being provided with a downward vand rearward extension, a series of intermediate levers tothe rear' thereof, links connecting said bars and leversto exert an upwardly inclined thrust" upon said type vbars,aseries of key levers, a-series of pivoted tilting levers connecting 4in 'the same plane said intermediate and said key levers, a supporting beam, a' pivot rod carried theretom edge to engage said rod, and a` beam forming a. support for the .pivots of said tilting levers.

6. A key and type vbar construction for a' 910 i' by, said key levers being Slotted at the bottypewriter, including a frame therefor' pro-' vided on the under side with three transversely detachable beams, each beam havingv -a plurality of corresponding slots and a pivot` pin.l passing through the top of the slots the entire length thereof, a plurality of key levers each pivoted near the end on the pivot pin in a slotA in .the inner beam, a i plurality of tiltinglevers veachpivoted intermediate its length on the pivot pin of the middle beam in' a slot; corresponding with that of a key lever, 'a'plurality of Le.

shaped leverseach pivoteddn the pivot pin on the outer beam in aslot corresponding'v to the tilting lever, the extremity ofneacli tilting lever being provided with a slot engaging a pincarried'by the adjacent ends of each'keylever and each horizontale-rin of the L -shaped lever, each upright' arm of Vsaid L-shaped leverbeing connected by a link to apivoted type bar. i JESSE ALEXANDER.

Witnesses:

RALPH C. POWELL,- CHAS. A. PEARD.

65 4. A key and vtype bar construction for a typewriteriincludinv a'pivoted type bar,

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