US1229521A - Line-spacer for type-writing machines. - Google Patents

Description

R. CVRHEA. LlNE SPACER FOR TYPE WRITING MACHINES. APPLICATION mio ma. 19m. www ocr. Le. me.

llYhitoville, I'

. `a coord ance w1 g UNITED STATES :PATENT oEEioE.

BICI-IARD, C. RHEA., OF WHITE'VILLE.' TENNESSEE, ASSG'NOR TO UNDERWOOD TYPE `WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATOLN OF DELAWARE.

LNE-SPACEB. FR TYPE-WRITING MACHINES.

Specification of Letters Patent.

Patented J une 12, 1.917.

Aapplication tiled January 31, 1916, Serial No. 75.386. Renewed October 18, 1916. Serial No. l26,290.

To all whom Air'nmg/ wacom: j

"Ee it known that I, Riemann Ci. Riina, a citizen of the ll'nited States, residing at -deman county, and State ot rIfennessee, have invented and discovered. certain new and useful vl'1nproveniente .in lane-Spacers tor Type-lriting Machines, of which the following a speciiication.

The j'neeent in vention relates to .line spacing ineohiilnisin 'tor tipe-writing' machines and consists in the eoinllirnititms and ar rangements of eleinelits hereinafter described and j'nlrtnnilarly set i'orth .in the ac eo nip a ny in g clail'ns.

A purpose ott-he invention is to provide an adjustable line sjiiaciug device which maar be convenientl)r set, for limiting theanguiar turning' rnoven'lent of the platen. in

'th the Spacing desired between the .lines ot the matter to be typewritten.y and wherein. such spacing may be Selected. with any desired degree of accuracy.

The invention further contemplates the 1 .use ot the device on machines einjnlojfing dei Cause it to gri tents :tor holding the 'platen against rturning after the sj'nicing operation or diilring Writing and tothis end a device provided tor throwing the platen holding datent tei'nporai-ily out of operative position when the desired adjustment is not exactly that olia tooth pitch or an v multiple thereof.

A feature oi? the invention. consists in the provision. of a stoj'i) clutch which is operated by the line-spacing lever as ,the latter conin pletes its througto grip the platen (or a part connected thereto) and. thereby arrest and prevent overthrow of the platen.y The stop clutch may be connected with the linespaeing lever or platen driver torotate idly about the platen axis the platen is rotated bv the driv'er, and may be arrested by a` stop as the platen completes a linespace rotation, said stop reeaeting on the clutch to 'p the platen and prevent over throw thereof.`

.The stop elutr. may be in the form of an expansion clutch comprising gripping arms to be expanded into gripping engagement with an annular surface which may be the inner pwiphery of a flange on the usual linespare ratchet wheel. One of said gripping arms may be connected to the slide bar or driver actuated by the line-spacing lever, So that `the stop clutch rotated during the driving Stroke. The other gripping afm may carry a pivot-ed arn'i which, as the platen, completes a line-space rotation, strikes a stationary.stop to swing said arin and cause it, by means of a earn thereon, to spread the clutch arms to grip said wheel. The driver and platen. are thus arrested. The said stop may be adjustable to var-y the throw of the driver, so that the line-slewing may be adjusteil to any desired. width. saale and pointer may co'perate with the adjustable stop to :indicate the width of the line-space for which the stop is adjusted.

The driver rnay he 'connected to the platen for rotating it, through an expansion clutch comprising gripping ali'ins arranged to be expanded into gripliing engagement with a flange of the linespacing wheel or other part rotating with the platen. The connection. between the driving elutoh and` said driver may comprise an arm having a pivotal connection with the driver .and operable by the latter to expand. the eluteli parts to grip said wheel as the driver eonnnenoes its driving stroke, so that the platen is rotated thereby during the driving stroke.

The invention is shownv by way of illustration in the accompanying drawings wherein Figure-1 is a. side elevational view of the device partly in section.

Fig. 2 is a section at the line 2%2 of Figi.

Fig. 3 is a top plan view partly broken away.

Fig. 4 is a 'liiersjjiective of the friet-ion clutches and their connecting arm, one ot the clutches being detached. from said arm to clearly show the structure.

Fig. 5 a. perspective view of the control for the detent'of the platen. pinion.

Fig. 6 a view showing the ratohet detent in. operative position, and

Fig. 7 a .sectional view of the slide securing clamp of the spacing device.

Referringto the construction in detail l. designates the platen trarne of an Underwood typewriting machine to which the invention shown as applied1 and 2 the platen journaled thereon after the usual manner and having the hand turning wheel 3. A

adapted. to be operated by the regular speen ing iever through the medium of an eXpanoion clutch that frictionaily engages with the 'inner periphery of the flange 8 of said ratchet wheel and which will be hereinafter referred to as the driving clutch. A second expansion clutch, which may be termed a stop elntch, is also actuated by the spacing lever at the completion of the platen-driving y stroke, to grip the iange 'Y of the line-space .ratchet ".vheei si,

stroke to rotate the platen. r l

wheel to stop the latter and prevent overthrow thereof.

The driving clutch, which is arranged to frictionally engage with the flange 8 of the comprises a pair of clutch arms or grips and 10 (see Fig. 4) in the form of dislelike members centrally cut away asiat 11, to vtit over vthe platen shaft, said clutch arms being connected at their lower ends by a pivot permitting the npper ends of the clutch arms to be spread, thereby expanding the clutch to grip the inner peripheral surface of the lange 8. 0n ie upper and of the clutch member 9 is an arm connected thereto by a pivot 51;

n said arm having a. cam surface 52, which.

when the arm 12 is swung tothe left (Fig. el) about its pivot, bears against-an arm 31 fixed to and proiectinor upwardly beyond the upper end of the clutch member 10. Thus the movement of the arm 12 about its pivot eii'eetive to expam'l the clutch into fric. tional holding engagement with the linespace wheel 4. The arm 12 has an opening in which is a pin on an arm 14, thereby piretally connecting the latter with the clutch member 9. The arm 14 is pivoitally mounted on a reciprocating slide bar ordriver i5by a. screw 16 (see Figs. land The bar supported to reciprocate on bearings 17 and 18 on the platen iframe, and is actuated by the usual line-spacing lever, which, at each operating stroke, engages the vforward end of said vbar and drives the latter rearwardiy or to the left. (Fig. 1;), and thereby actnates the clutches, as hereinafter ex'ilained. The driver 15 -s'is' returned by a. spring connected at one end to a pin 1i) on the driver, the forward end of 'the spring being anchored to theV platen traine.

Vvi n :he driver 15 commences its driv-v ing stroke, it operates through the arm 14 lo swing the Yarm 12 of the driving clutch to lock the latter to the line-space wheel, and thus to the platen. The driver-is then operative during the remainder of the driving As the driver 15 returns., it first swings the arm 12 to the right, that the driving clutch released and then returned with the driver to starting position while the platen remains at rest. The extent of rotation of the platen, at each operation ot the driver, length of the stroke of the driver, and this is reguated by au adjustable stop. The

lin

depends on the latter controls the action of the stop clutch, which is automatically brought into operation at the completion of the driving stroke, to grip the line-spacewheel7 arrest the platen, and prevent overthrow of the platen.

The stop clutch comprises clutch parts or grips D and 10aL connected by a pivot 50a, said grips located within the outer flange 7 of the ratchet wheel and adapted to be spread into clutching engagement therewith. Fixed to the member 9 is an arm 12Z1 having an opening 53 to receive a` pivot pin 13a on an arm fixed to the arm 14. The clutch arms 9 and 1 1 are spread by means of an arm 31a connected by a. pivot 51a to the clutch member 10*l and having a cam surface 52l to bear against the fixed arm 12a when the arm 31a is swung about its pivot. During the driving stroke of the driver 15, the

stop clutch 9a, 10L rotates idly with the Aplaten by means of its connection through the arms 11 and 55 to'said driver. As the driver completes its stroke, the arm 31a engages a stop 30, thereby expanding the stop clutch 9a, 10a, to grip the lne-space wheel. and at the same time stopping the rotation of the clutch, so that the driver is arrested and the platen stopped. The stop clutch is effectual to prevent overthrow of the platen as said clutch is positively arrested, and the greater the force applied to the driver tending to cause overthrow of the platen, the more powerful is the gripping action of the clutch to prevent overthrow.

The stopping device comprises a plate 23 having the stop lug 30 which arrests the clutch arm 31a. The plate 23 is slidably mounted on a cover plate 21 secured `by screws 22 to the platen frame and forming a l"part thereof. The plate 23 has a4 fingerpiece 21 for adjusting the same. A screw 25, fixed in the cover plate 21 and having a knurled nut 2G, passes through a slot 27 in the plate 23 and through an openingin a clamping plate 28 overlying the plate By setting up the nut, the plaie 23 is securedy in. adjusted position. The clamping plate 2S carries a pointer 29 that indicates the adjustment of the plate 23 by a cale marked on the plate 23.

The ratchet 32 of the \\"^.i 4 is adapted to be engaged by a` detentfor holding the latter against' accidental turning and said detent .consists of an arm 4pivotally mounted on the pin 34 and a roller 35 carried by the arm engages with the teeth 32 in 'the usual manner. A spring 36 normally ac"i on the arm 33 to hold the detentin opive position.

It is sometimes necessary to space the lines of typewriting matter in such a way that the distance between them mav not agree with the size of the teeth of the platen, as for instance en ruled paper, and it is therefore proposed to move the detent temable with porarily from operative position. To thisI end a releasing derivi ii is torna-d with a flange li (see hij. :3) littcd on the riin ot the wheel -land said (lange is ri'mstructed with an inturned portion Pif) that works be tween said wlieel 4 and the member l-(l on the platen sha'lt 5. A\ cani traehr itl is iornicd on the member 57 and engages the grooied roller i?, mounted on the detent arm 33 and said cam track operates to more the detent from operative position by angularly shitting said lever by the handle i3. At its respective ends the cam track' fl-l is hooked formingr stops 4i and -l-5 that engage with the roller 42 and determine the angular movements oi the dote-nt coiitrol. The inember if? held in positioli on the ratchet n'l'ieel by n'ieans of the s;iring-i'nessed dctent arm 35i.

lt is ibvions that those skilled in thil art nini Vari' the. lr-tails o'llv minstruction and rai'meiiu-nts ot parts ivithout departing; trom 'the spirit oi the invention. and therefore l do not uish to be limited to such i'catures ema-pt as may be required by the claims.

Having thus described my invention what .I claim als new and desire to protect by Il. S. Letters Patent is:

1. In a. p 'x-writcr spacing mechanism the combination oi the platen having` ay wheel, a i.' tion clutch comprising a pair of pivotallly connected and separable members adapted to engage said Wheel, an arm carried by one of said clutch membersm reciprocablc barl pivotally connected to said arm .for actuating the clutch to operate the platen, an arm carried by the other clutch member, and an adjustable stop coperable with the second clutch arm to limit the turning movement ci the platen, substantially as described.

2. In a type-Writer spacing mechanism the combination oi" the' platen havingr a flanged wheel, a` friction clutch comprising a pair of separable semi-disk members arranged concentric with and adapted to engage-the flange of said Wheel, arms carried by said. disk members respectively, a reciprocable barpivotally connected to one of said .arms for actuatin the clutch to operate the platen, and an a instable stop coperthe second clutch arm to limit the turning movement of the platen, substantially as described.

3. In a type-Writer spacing mechanism the combination of the platen having a double flanged wheel, a pair of friction clutches arranged concentric with and adapted to engage the flanges of said Wheel respectively, a pair ot arms carried by said pair of clutches, a reciprocable bar pivotally connected to said arms for actuating the clutches to operate the platen, and an adjustable stop coperable with one of the clutches to limit the turning movement of the platen, subst-.mtiall)y as dcscribial.

el. ln a type-writer spacing mechanism the combination o'l the platen having' a. double-llangzjei-l wheel, a pair of 'friction clutches con'iprishtgT each two separa-ble semid-isk inenibers ada pted to engage the resper tire [langes ot said wheel, arms carried by said pairs ot' disk men'ibers, a. reciprocablo liar connected to said. arms for actuating' the clutches to operate the platen, a second arm carried by one of said clutches, and an adjustable stop coiil'icrable with said second arm to limit the turning movement oi the platen, substantially as described.

5. In a. type-writer spacing mechanism the col'nbination oi: the platen and the supporting iframe tl'icrctor, means for inni-.irting rotation to thel platen comprising scparablc friction disks, an arm carried by one of said disks, a plate slidably mounted on the Jframe, a device for securing` said plate in ditlcrent adjusted positions, and a stop member carried by the plate adapted to` engage said dish arm and lock said dish to the platen to limit the turning: movement there-1 of, substantially as descriliied.

6. In a type-writer spacingl mechai'iism the combination oil the platen hiiving.,r a. ratchet Wheel, means for imparting rotation to the ratchet Wheel, a detent comprising a pivotally mounted :.rm carrying` a roller engaging with the teeth of the ratchet wheel, means for predetermining the turning` movement of the ratchet Wheel, an angular-ly shita-ble member mounted on the ratchet wheel and held thereon by said detent arm, and a cam track carried by said member engaging with said detent arm and operable to shift the same from operative position. substantially as described.

7. In a type-Writer spacing mechanism the combination of the lplaten having a ratchet wheel, means for imparting rotation to the ratchet Wheel, a detent comprising a pivotally mounted .arm carrying a roller engaging -With the. teeth of the ratchet Wheel, means for pre-determining the turning movement of the ratchet Wheel, an angularly shiftable member mounted on the ratchet Wheel and held thereon by said detent arm, a grooved roller mounted on said detent arm, a cam track carried by said shiftable member engaging with said grooved roller and operable to shift the detent arm from operative position, and stops formed on said cam track for limiting the angular movement of said shiftable member, substantially as described'.`

8. The combination of a platen, and means to line-space the platen, comprising a manually-operated driver, a clutch-moved.4 idly by the driver during its driving stroke, and meansto arrest the-movement of said clutch,

to permit the driver to actuate the clutch and Cause-.ltftohold the platen;

E). The con'ibination with a rotary platen, of a manwally-operated, driver, means con necting the driver with the platen for rotatingr the latter, a stop clutch connected to the driver to be rotated thereby with the platen, a clntch-operatiin;l device carried with the clutch and. movable relatively thereto to actuate the clutch,I and a stop in the path of said device to arrest it and canse said relative movement, thereby causingthe clutch to grip the platen or a part rotating therewith, and thus arrest the platen and driver.

10. lhecombination With a rota ry platen, of a manually-operated driver, means conneeting the driver with the platen for rotat ing the latter, a stop clutch connected to the driver to be rotated 'thereby with the platen, a clutch-operating,` device carried with the clutch and n'iovablc relatively thereto to ao tirate the clutch, a stop in the path oi? said device to arrest it and cause said relative move ment, thereby causing the clutch to grip the platen or a part rotatingl therewith, and thus arrest the platen and dri\ ir, said stop adjustable to vary the stop position of 'the elutclnand a scale and pointer relatively adlinstable by the adjustment of the stop to indiente 'the distance through which the platen will be rotated by an operation of the driver.

11. InI a t pewriting machine, tlie eombii nation with a rotary platen, of a reciprocating driver, means connecting the driver with the platen for rotating the latter, va stop clutch comprising gripping arms, means pron viding an annular surface rotatable with the platen and with which said arms may be brought into gripping engagement, one of said arms connected With the driver to cause the clutch to oscillate as the driver reeipro Cates, a el'utcli-operatin'g device carried .by the other gripping arm and operable by a movement relative thereto, to canse said arms to grip said surface, and a stop in the path of said clutch-operating device to arrest it, and thereby actnate the clutch tohold the' platen and arrest the driver.

12. In a typewriting machine, the combination with a rotary platen, of a reciprocating driver, means connecting the driver with the vplaten for rotating the latter, a stop clutch eolnprisinf.,1r gripping arms, means pr'r viding an annular surface rotatable with the platen and with which said arms may be brought into 'gripping engagement, one of said arms connected with the driver to cause the clutch to oscillate as the driver reeiprocafes, a elutchoperati.np, device carried by the other gripping arm and operable by a move ment relative thereto, to cause s. -d arms to grip said surface, a stop in the path of said clutch-operating device to arrest it, and thereby acttiate the clutch to hold the. platen and arrest the driver, an adjusting plate carrying said stop and adj nstable to vary the position of said'lstop, a thumb screw to clamp said Lacona-i plate in adjusted' position, a scale on said plate, and a pointer along which the scale moves as the plate W wird, to indicate the length of line-space for which said stop is adjusted.

13. The combination with a rotary pla len, oli' a niannally-operated driver for rotating the platen step by step, a. clutch comprising gripping arms, a clntclrlioiding member conn nceted to rotate with the platen, and having an annular flange with which. the clutch arms are expansible into gripping ei'igagement, one ol? said arms connected to the driver to canse the latter to oscillate the clnteh about the platen axis thedriver reciprocates, a. cam pivoted on the other gripping and a si op in 'the path oi" said com ope .ble as the clutch is rotated by' the ri said cam, 'thereby ern ment of the cam and itf by the clutch opera-imi to lar flange, and there platen.

The combine oit line-:nach enanisin coen; ciprocaiing driver, an ex'iarf'ion clair nected with the driver to oseillate aboni'- the platen axis as -the driver is reciprocated, and means to actuate said clutch. the driver completes a driving stroke, to canse the clutch to hold the platen., and thereby arrest the driver and platen.

15. The combination with a rotary platen, of line-spaeing mechanism comprising a ciprocatinadriver, an expansion clntcli eonnected with the driver to esciliate about the platen axis as v:he driver is reciprocated, and a stop to arrest the clutch and throw it into gripping engagement with parl'. "otati'ngg with the platen, to the and driver.

16. The combination with a rotary platen, of ailine-space ratchet wheel comprising` an annular flange, a reciprocating driver for eiffeeting line-space rotations of the platen, stop clutch comprising pivotally connected grilil'iing arms, one of iv lich is coni'iected to the driver to oscillate the clutch as the driver reciproeates, as clutch actuator carried by lthe clutch, and a stop in the path ot said actuator to arrest it at the con'ipleton of a driving" stroke, and thereby canse it to expand the clutch arms to grip said flange and arrest the platen.

' 17. The combination with a rotary platen, of a line-spa@n ratchet wheel comprising an annular flange, a reciprocating driver for effectingline-space rotations of the platen, a stop clutch comprising pivotally connected gripping arms, one of which is connected to the driver to'osillate the clutch as the driver reeiprocates, a clutch. actuator carried by the clutch, a 1stop in the path of said actuator to arrest 'it at the completion of a driving Stroke, andthereby cause it to expand the and thereby arrest the platen and clutch arms to grip said flange and arrest the platen, a` detent coperating with said linespace wheel to hold it at line-space positions, determined by rthe ratchet teeth on said Wheel, means for holding the detent off tlie ratchet wheel, andfmeans to adjust said stop for arresting the platen at positions inter nected thereto to drive theplaten daring the Ainoved. idly therewith inovenient of the driver in one direction, a

lseeoinl rlntcli connected to vbe moved idly about the driver as the latter is nioved in sa id direction, and nieansl to arrest said second clutch and actuate it: to hold the platen, and thereby arrest the platen and driver, said clutches both inovabie idly about the platen anis in the reverse direction and thereby returnable with the driver to Startinl; position while the yplaten remains at rest.

2t). 'lhe combination with a rotary platen, ot a mannaily-operated driver, a driving clutch actuated thereby and a holding clutch actuated by to arrest the platen.

2l. The combination with a rotary platen, of a reciprocating, manually-operated the driver driver, a driving clutch, a connection between said clutcli and driver for actuating the clutch as the driver commences its driving stroke, to connect the clutch and platen, and canse the platen to be rotated by the holding clutch connected to' the driver to be during the driving stroke, and a stop operable t0 arrest the holding clutch and actnate it to grip the platen and arrest the latter.

22. The combination with a rotary platen, ot a niannaily-operated reciprocating driver,

stroke, to hold the platen,

of a reciprocating driver,

to rotate the platen,

clutch during the driving stroke, a

my hand and seal at a Vdrivin clutch anda holdin clutch both connecte tothe driver to oscillDate about the platen axis'as' the driver reciprocates, the connection of the driver with the driving clutch bein operablel to canse the vlatter to drive the p aten as the driver moves in one direction, .and means to actuate the holding clutch as the driver completes its driving.

, said holding clutch being normally disconnected from the platen during its oscillation in both direetions.

vThe combination with a rot-ary platen, means providing an annular clutch-holding surface rotatable with the platen, Ian expansion ehitchconr: prising gripping arms expansible into grip ping engagement with said snrfaceand a connection between said driver and clutch `for operating the latter as the driver coinmences its driving stroke to connect the clutch with the kplaten and canse the clutch to iotatethe platen during the remainder of' the driving stroke, matically released from the platen and returned with tl'ie driver.

Q4. The combination with a rotary platen,

of an expansion clutch comprising arcsliaped gri pspivotally connected at one end,

,nieans providing an aniinlar gripping siirface into engagement with which said grips are expansible, a cain carried by one of said.

grips and operable by a inovenient relative` thereto to spread said grips int-o gripping engagement with said surface, and a reciproeating driver connected to said cani for acta.- atino tliccliitch when the driver commences its driving stroke and causing the clutch to rotate the platen dui-in the driving stroke, said cani operated by tlie driver to release the clutch as stroke and return the clutch with the driver to starting position.

In witness whereof, I have hereunto set Whiteville, Tennessee, this 21st day of January, A. D. nineteen hun dredl and sixteen. l

RICHARD C. itl-IEA. ['L. a] `Vitiiesses W. C. Nanni-IAM,

T. R. Haznnwoon.

said clutch being antof the driver commences its return

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