US939640A - Type-writer-carriage stop mechanism. - Google Patents

Description

M. B. SARGBNT. TYPE WRITER CARRIAGE STOP MECHANISM. APPLICATION FILED APR. 20, 1909.

939,640. Patented Nov. 9,1909. I 2 SHEETSSHEET l.

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APPLICATION FILED APR. 20, 1909.

Patented Nov. 9; 1909.

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1VI ABSI-IALL B. SARGENT, OF MOMENCE, ILLINOIS, ASSIGNDR TO EMERSON TYPEWRITER COMPANY, OF GHICAQQ, ILLINOIS. A CORPORATION OF MAINE.

TYPE-WR ITER-bAREIAGE ,sror MECHANISM.

"1'0 all whom it mayconcern:

Be it known that l; MAnsrIALn B. San

(a -,1 citizen of the United States, residing at lrlonu-mre, in the county of Kankakee and 'Hlale of Illinois, have invented certain new and useful improvements n Type-Haterxrrragefitop h'lechamsm, of which the tollowmg is a specification.

This invention relates particularly to the i-nust ruction and arrangement ot' mechanism for releasing and stopping the carriage at various column positions, and also to the means whereby the movement of the carwhen released, will be braked sailito prevent sudden shocks or jars in I the stoppage of the carriage.

piug keys are actuated, it has been the lit and claimed.

l" lie object of the invention is to so, con

struct and arrange the variousmechanisms above referred to that the limiting and'releasing of the carriage will be performed by the same piece of mechanism in such manner I as to permit of the simplification of the esca'peiiient do; which controls the norma feedingmovement of the carriage.

in certain prior constructions, in orderto release the carriage when the column st0ppractice to mount and construct the escape- .ment dogs insuch a manner as to permit dogs, a lifting n'iovelnent is given to the rack at once when the release is elfectechso that the construction of the escapement dogs is simplified and the certaii'1ty of its operation assured. a a I Further objects 'will appear lrom a detailed'description of the invention, which consists m the features of construction and combination of parts hereinafter described In the drawings, Figure 1 is a rear elevat on of a. typewriter, showing the base frame part ally broken away to reveal the interior mechainsm: Fig. 2 a longitudinal sectional view, showing the colmun stop key and the.

associated stop and releasing mechanism;

'and Fig. is an enlargei'l detail showing the lincthod of hinging the rat-l bail. I It will he understood that in the drawings Specification of Letters Patent.

of the rack project.

provided at each-end with an arm 1%) which- Patente'd Nov. 9, 1909.

Application filed April 20, 1909. "Serial No. 491,027.

front cross wall (3. The top of the frame is covered by a floor 7, which is cut away at suitable points to permit of the passage therethrough of the mechanism to be herein a fter described. 1

The rarriage S, of which the details form no part of the present invention, is provided with end plates 2), which are connected at-the rear side bya rear cross bar provided with depending guide lugs 11, which are recessed to receive a guide rod 12, which is aili'ietl by a pair of posts 13 located at' the extreme rear edge of the machine frame. The end plates are connect-ed at their lower side'by a carriage frame let provided, on its rear edge, with a depending flange l5,which serves as" a stop for positioning a rack 16, which is riveted or screwed to a swinging rack bar 17 of angle formation provided, at its lower-edge, with a reanvardly extending flange or step 18, below which the teeth The rack bar 17 is extends forward horizontally or at right augles to the rack bar, and terminates in a hanger 20, best shown in Fig. 3. Each of the hangers is provided with a tapered pivotal opening 21, which receives,the conical end 220i an adjustable screw 23, which arrangementservcs an adjustable cone bearing for'the rack bar and the rack carried thereby, permitting longitudinal adjustment of the rack. As shown in Fig. 3, the adjusting screws are provided with smooth shanks 24., which furnish bearings for a pair of hangers 25, which are upturned from arms 26 carrying a line lock bar :27. The arms or bails 2o lie upon 'thea ans or bails .15), but the'line loch bar has nothing to do with the present invention, and further rel' erencc to it need notloe niade; The arm or bail 18) is provided with an upwardly eX- tending lever which permits the rack bar to be swung up to lift the rack out oi engagement with the escapcment dog's 31 when it is desired lo make an adjustment 0" the carriage indepcndoiuly stmx hav f the column' The column stop keys 30 are located near the forward edge "of the main frame of the machine above and to the rear of the space occupied by the writing keys, and each of 5 the keys 30 is located on the end of a shank 31 the lower end of which is pivoted to the forward endofv the key lever 32," which is pivoted somewhat forward of the center to the key lever rod 33. The rear end of the lever is pivoted to a vertical link 34, the upper end of which,-in turn, is pivotedto a bar 35 which carries at its upper end a stop pin 36, which normally lies below the level of the floor of the machine frame and is adapted,-..

when the key is. depressed, to be lifted into position to'engage a stop lug 37, which depends from the carriage frame 14. The stop lug, in addition to its'funct-ion as a stop, is

:provided with a finger 38, which engages the inner .edge of an undercut guide bar 39,

which, in'combination with the guide rod 12,

' and a roller 40, furnishes a firm and even support for the travel of the carriage. Each "of the bars is provided with a forwardly extending finger 41, allof which fingers en:

gage the under edge of a lift bar 42 rovided 'with arms 43 which are hinge or pivoted to theside walls of the machine frame, a spring 44 being rovided to nor: mally hold the lift bar in owered osition. The lift bar, at its center, is provi ed with a notch 45, which receives the inturned. end

46 0f a brake lever, which comprises a front the flange or step 18, which is adapted to be engaged by the braking arm when the actuating arm is lifted. h

the usual manner b the tension of a spring actuated cable '51 t e details of which need not be described.

In use, when it is desired to stop the carriage at a specified column, the proper col- 50 umn stop key-is depressed, whi serves to elevate the "inner end ofthe key lever 32, thereby raising the stop in 36 into position 5 to engage the stop lug 3 when the carriage is released. Simultaneously with the raising of the stop pin, the lift bar 42 will be elevated, and this movement of the lift bar will throw up the actuatingarm of the brake lever and lift the brake arm. The latter will engage with and swing up the rack bar to, throw the teeth of the rack bar out of en agement with the escapement dogs, there y releasing the carriage which will move to the designated position. This movement will, however, be smooth and easy 6 by reason of the contacting of the brake e carriage is fed in.

arm against the flange or step, and in order to limit the upward swing of the rack bar-to render this braking action effective, it is desirable to provide stops 52, which inwardly extend from the end plates of the carriage frame in position to limit the upward swing of the bails. It will be understood that any number of column stops can be provided, and that each of the stop bars 35 1s rovided with a finger which engages the li t bar, so that the releasing and braking actionpreviously described, will be uni- .form regardless of the identity of the key depressed.

k It will be seen from the foregoing deseri tion.' that the construction is an extremely simple one in that the braking lever serves a double function in releasing the rack bar and braking it, and that the method of etfectingthe release 'is extremely simple as compared with one in which the escapement dogs are thrown to a nonengaging position. By hinging the rack bar .in the manner described, it can be longitudinally adjusted so as to bring its teeth into perfect register with the escapementdogsin adjusting the machine at ,the factory after assembling the parts.

What I claim as new and desire to secure by Letters Patent is: 1. ln typewriter carriage stop mechanism,

in combination with a carriage and-escapement devices, a rack bar carried by the carriage and adapted to be raised and lowered with respect to the escapement devices,and having a rack connected therewith, a' plurality of column stop pins normally lying below the carriage, and devices for independently lifting. such pins to assume a osition in the path of travel of a portion 0 the carriage, a lift bar adapted to be raised by the upward movement of any one of the pin lifting devices, and a brake lever having one of its ends in position to be engaged by the lift bar and ralsed therewith, and having its other endin position to engage the rack bar and liftthe same and exert a braking action thereon, substantially as described.

2. In typewriter carriage stop mechanism, in combination with a carriage and escape.-

ment. devices, a rack bar carried by the carriage and adapted to be raised and lowered with respect to the escapement devices, and having a rack connected therewith, a plurality ofcolumn stop pins normally lying below the carriage, and devices for independently lifting such pins to assume a position in the path of travel of a portion of the carriagefia pivoted lift baradapted to beraised by the upward movement of any one of the pin lifting devices, and a brake lever havingone of its ends in-position to be en. gagedby the lift bar and raised therewith, and having its other e'ndin position to' engage the rackbar and'lift the same and exert v a'braking action thereon, substantially as described.

3.," In typewritercarriage'stop meohanis'm,

7 in'oombination with a'c'arriage and escape men't' devices, a rack. bar pivoted at its ends to the carriage, and "adapted to be raised and I loWered: with respect t'o'the eseapernentldea v1 ees'-,':and having'a rack connected there- 'with a'plural-ityof column stop pins 101"- I sunie-'ai position 1n I portionfof the carriagmalift-bar adaptedito 1 b;e raised by "the, 11

one of the pin 'lifting devices,

mally lying below th'oarria'ge, anddevices for inde'pen'dentl 'liftingsuch pins tov'ias' the path of .travelof 1a ward movement of any and-a brake f-.-b,e engaged-bythe lift bar andr'ais'ed there with, and having its other endin positionto' engage the rank-ban and lift the same-and" vices, having exert a braking aetion thereon, substantially vin oeombination with. aearriage' aI-i'd' escapea merit-devices, I I I v to thecarriagq'and adapted to .be'ralsed and a lift bar pivoted at its'end's lowered-with-'respeet"to the es'capement de} a-rack'goonnected" there-- adapted tobe raised ythe u nentof' any one of -the pin-1i: ting deviceS,1f 35 I ma lly lying below the Carriage, and deviees s1 1mea'position"1n lifti'ng s'ucb'pins to as-. the path of travel .ofa pivoted lift-barward-move;

for. independently portion ofthe carri'a e,

and a brake lever having one-oflits-ends in position to be-engaged by .the lift bar Land;

' raised therewith,

and having its other end 5' in positionjto' engage the rackjbar malift Y the same and exert a braking action thereon, m Y In typewriter camliig'e stopmechanism;-

. in combination witha oarrmgeandespapQ substantiallyasdesoribed, j

' .inent devices, a rack bar pivoted-at its I .to the earria geand'adapted to be swung to-v "ward and from: the eseapem'ent devices, and having arack connected therewith, a pluf fromithe esca em'ent devices'and having 'raek' connect therewith, a plurality ofcol- Inent devices, a, raek har. earried -'b th earl: l rla'ge and adapted to be moved toward-and 'umn stop pinsrnor rnal'lylying outside (if-the path oftma'v'elof,- the earriagmj'n'd devices for indepe identlyjmoyin'g such pins to as ,su'i'ne a position in the- 'path of traveloof :1

- pin actnatin' I mg one-"of its ends i'n position t'o'be'engaged by said barand moved therewitli,'and hav- J v a. so I portion. of the, oa'rr'iage, a bar adapted to be moved by the. m0vement,of any one of the devices, and a brake lever-haw,

m its" other end in position toengage the rack bar. and move the-same out of engage nentwiththe escapement. devices and, exert a" braking: action "thereon, substantially as- '6; In typewriter earriage' stop mechanism,

rality of column sto' 'pins normallylying outside of thepathjb 'travelof thelg carnage, a and devices forindependently "inoying suchins assumea position" In chef-path of 70 7 travel of ,a portion of the '.'carr1age,' a baradaptedfto be moved .-by 'the'. movement of any one of the actuating brakeflever I j o -e gag d therewith, and

Win-15m Banning,"

"by, sa d bar and moved;

tion' to *engage' the rack. bar and move the ombination withayearriage and-eseape- I ends devices, and ii. having OII G-OfJCS ends in .p'osfl-

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