US1223279A - Type-writing machine. - Google Patents

Description

W. F. HELMOND. TYPE WRITING MACHINE. APPLICATION FILED xuLvzs. 1915.

Pa tented Apr. 17, 1917.

WITNESSES: y Wfi/W Y I a ATTSFTX UNITED sTAr s PATENT OFFICE.

WILLIAM F. HELMOND; 0F HARTFORD, CONNECTICUT, ASSIGN JR T0 UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A COBPORAI ION OF DELAWARE.

TYPE-WRITING MACHINE.

Application filed July 26, 1915.

To all whom it may concern.

lie it known that l. \Vnmrnr F. I'IIGLMOND,

a citizen of the. United States, residing in- Ilartford, in the county of Hartford and State of connecticut, have invented certain new and useful Improvements in Type-Writingr Machines, of which the following: is a specification.

This invention. relates to the case-shift mechanism of typewriting machines, and particularly to keys which lock: and unlock the case-shift mechanism.

In the Underwood typewritiiur machine, to which my improvements are illustrated as applied, a shiftkey is provided at the left-hand side of the keyboard, for the usual purpose of shifting the u'lechanism to capi tal printing position; and at the right-hand side of the keyboard. it is custon'iary to provide a similar shift-key. which upon being depressed. will not only shift the mechanism to capital printing positiolnluit will also look it in such position, a release of said lock being effected by depressing the shift-key at the left-hand-side. oi. the kevhoard.

It is found desirable in practice. thatthere should he not only a key at the left, but also one at the right of the keyboard for effect ing: a temporary shift of the mechanism to capital printing position, so that the operator may depress, by either his left hand or his righthand, a capital shift-kev. and so that upon releasing either of said kevs. the mechanism will shift back to its normal position.

The object of this present invention is to provide for the purposes mentioned. a mech anism, not only simple and inexpensive; but

i also extremely compact: adaptable for use in connection with existing machines with little or no change in the standard parts thereof; neat. in that the operating connections thereof do not encumber the plainly visible'parts of the keyboard or key levers; and reliable in that it is certain in operation.

tl()tS li0t become uncertain by reason of wear,

and requires .no delicate shaping and fitting: to the parts ofthe machine with which it is to cooperate.

Aceordingto the present improvements,

the left-hand shift-key serves for tempo rarily shifting and also for releasing the platen when it has been locked up. The. right-hand shift-key is mounted on a platen' Specification of Letters Patent.

1 atentetl Apr. 17, 1917.

Serial No. 41,8 (0.

pressed latch her tofore common to Under-- wood typewritin machines, the oiiioe of which is to catch over the pin or projection on the rightdianjl key lever to lock down the right-hand shift-key when the latter is depressed; but mounted upon. the right-h and key lever is a itil or trip which normallv disables the latex, so that it is prevented from catching 0 er the pin. A spring" retains this trip ii. normal positioin'so that whenever the right-hand shift-lay is depressed, the latch is unable to ca ch over the pin". 1

To make it possible to lock down the right-hand shift key, there is provided a separate kc v whit h is mounted upon the trip to lift the, same t inellective position so that it cannot restraii the latch or look from catching over the pin on said shift-key lever. This trip, which may be in the form of a lever arm. is ca] able of limited movement upon the main sh ift-key lever; serving in its normal, depressed position to render the latch ineffective. and also serving when lifted by depressi m oi. a finger key to.-release the latch to enable it to catch over the pin. The key for this trip also serves to shift the platen. From. tl is. it results that the lefthand kev lever i ray be used for temporary shifting o'l the-platen, and. that the right hand keylever may be employed for the same purpose, and that the trip key may be operatedfor shit ing the platen and locking the same in its sl ifted posit-ion.

The lock or la eh for the shift lever may be of the identical style and mounting common in the Unlerwood typewriting machine; that is t( say, may be an upstancling one-armed swing-controlled hook. To adapt the presert invention to use in connection with such a latch, the lever which carries the foil ir stop, (for interposition in the path of the hook when a temporary shift, only, of ti 1e platen is desired) is of novel C0115t1'nCti(n in that it is pivoted at an intermediate point ther of to the right hand shift lever so that tiepression of the lock key causes the stop or foil controlled thereby, to be lifted above and out of the path of a cooper: ting pin or shoulder on the latch arm when the lock is to be rendered operative; and so that, although the stop or foil is so lifted, the lock keyitself, is depressed in the usual manner to cause the foil-carrying lever, as soon as it sets the foil, to pick up, and carry with it, the shift lever on which it is mounted. The lock lever is pivoted to the shift lever at a point of the latter sufficiently removed from the front of the machine to cause it to be substantially concealed frun front view, and it is so (IODStl'llCtl-Ed and positioned as to be free from injury and interference. In mechanism constructed according to the present invention, the pin or detent on the shift lever, which cooperates with the latch, may also serve not only as a means for camming hack the latch to permit the latch to pass the pin for engagement over the same; but ma serve as a stop which, by cooperation witi the foil or interponent, determines the normal position of the foil lever on the shift lever; and may also serve as a stop, to limit the throw of the lock key lever on the shift lever when the lock key is depressed, thereafter causing the two levers to move as a unit in' the shifting operation.

The latch may be released by the means usual in the Underwood typewriting machine, a pin upon the left-hand key lever engaging a cam, and the latter fixed on a rock shaft which extends across the machine, and carries the latch heretofore mentioned, whereby said latch is rocked away a m1 releases the right-hand shift-key lever, so that the same returns to nor a1 position together with the platen.

Thus by a simple provision, the operator is enabled to shift the platen temporarily and quickly up or down, with either the right or left hand, while at any time he may c. the platen up for writing a line of ainpitals, and release the same by the Yigsual .CF'V.

- Other features and advantages will hereinafter appear.

In the accompan ing drawing,

Figure 1 is a front perspective elevation showing a portion of a typewriter carriage, the latcn frame, and mechanism with operating keys.,,for shifting the platen verticall Fig. 2 is a side elevation of the parts shown in. Fig. 1, the platen being in uppercase position, and the shifting mechanism being locked.

Fig. 3 is a fragn'ientary view in side elevation of one of the shift-keys with the looking key and lock or latch in the position assumedwhcn the shift key is depressed for temporary shift to upper-case position.

Fig. 4 is a fragmentary view in side perspective of the parts shown in Fig. 3, together with the left-hand shift key and the mechanism controlled thereby for unlodring frame by means of a roller 8 which rides' along the rail as the platen has its. letterfeed movement. The rail with the platen is shifted by means of vertical extensions 9 and 10 on the shift levers 11 and 12 respectively; the platen framebeing griiled in its shifting movement by arms 14 on a. rock shaft 13 mounted in the carriage frame.

The key levers 1]. and 12, which are fulcrumed on the shaft 15, are held normally elevated as by springs 16, and are providedv at their forward ends with the usual keys 17 and 18, one shift-key being at each side of the keyboard.

Either key 17 or 18 may be used to shift the platen to upper-case position for the writmg of capitals or other upper-case characters. In the present invention, however, the platen is notlocked in upper-case position by depression of either of these keys; whichever of these two keys is operated must be held depressed by theoperator, and upon its release, the platen assumes its normal or lower-case position.

The advantage of this feature is that occa-- sion for temporary shift may occur when one. or the other of the operators hands may be more conveniently used for actuating the shift lever.

One of the shift levers, however, to wit, lever 11, is provided with means whereby it may at will be locked in upper-case position i for permanent or sustained use in that position. This locking means is normally inoperative; that is to say, is i'no rative when the shift lever 11 is actuated y its ke 17.

For operating the lever 11 when the p atom is to e locked in upper-case position, the lever 11 carries a second key 19. The key 19 is directly mounted on a short lever 20,- ivoted at 21. to the shift lever 11. A eaf spring 22 attached to the shift lever 11 and bearing on the locking lever 20, normall' holds the latter lever in Fig. 1 position, wit

a lug or stop 23, formed. by a turned-over portion of said locking lever, in the shape of a gooseneck, bearing, against a-projecting detent or shoulder, here shown as a pin 24, on the shift lever. As indicated in Fig. depression of the kev 19 first rocks the lever 20 around its piv'ot 21 on the shift lever--11,

against the action of the spring 22, until a cally shifting said lock to a binaticn witli-a shiftable platen, of a lever depressible to shift the platen, a look therefor, means for 'aiiqgnatically shifting said lock to a predetermined position at each actuation of the shift lever, a stop having a normal effective position on the shift lever such that actuation of the latter for a tamporary shift of the platen causes the stop to be carried from a position out of the path of the lock to one in which it is in said path, so as to prevent operation ofsaid lock after having been so shifted, means for lifting the stop-on the shift lever fromits normal position to an ineffective position from which it cannot, by operation of the shift lever, be brought to its position in the path of the lock, and means for throwing the lock, for sustained shift of the platen, when the shift lever is operated with the stop thereon in ineffective position.

.3. In a type'writin machine, the combination with a shifts le platen, of a shift lever, a lock therefor, means for automatically shifting said lock to a predetermined position at each actuation of the shift lever, a stop-carrying arm pivoted to the shiftlever and normally held in such angular osition thereon that actuation of the shift over, for a temporary shift of the platen, causes the stop on said arm to move'from its normal position to a position in which it is interposed in the path of the lock,

after said lock has been so shifted, means for ;moving said arm on its pivot in the oposite direction to cause the stop thereon to e held where movement of the shift lever cannot brin it .to the path of the lock, and

means fort rowing the lock, for sustained shift of the platen, when the shift lever is operated with the stop thereon in ineffective position. a 4. In a typewriting machine, bination with a shiftable platen, of a shift lever, a lock therefor, means for automatiredetermined position at each actuation of t' e shift lover, a stop-carrying arnrpivoted to the shift lever, a spring for normally holding said arm in such angular position onthe shift lever, that actuation of the shift lever, for

a temporary shift of the platen, causes the sto on said arm to move from its normal position to a position in which it is interposed in the path of the look after said lock as been so shifted, means for moving said arm on its pivot in the, opposite direction to cause the stop thereon to be held where movement of the shift lever cannot bring it to the path throwing the ck for sustained shift of the platen,- when ,t e shift lever is operated with the stop thereon in ineffective position.

5. In a typewriting machine, the combination with a shiftable platen, i of a shift lever, a detent on said lever, a springlatch the com- I of the lock, and means for adapted to engage said detent to lock the shift lever when the latter is shifted, said detent acting to cam back the latch during the shifting operation until the latch can snap into interlocking engagement with the detent, an arm, with a stop thereon, ivoted on the shift lever and n rmally hel in an angularposition to caus .;he stopto be interposed in the path of the latch after the latter has been cammed back, thereby preventing locking of the shift lever when the same is actuated for temporary shift of the platen, and means for rocking the, stopcarrying arm reversely to the direction in which the shift lever is moved, to prevent "the interposition of the stop in the path of the latch when the shift lever is operated for a sustained shift of the platen.

6. In a typewriting machine, the 'combination with a shiftable-platen, of a shift lever, a detent on said lever, a spring latch adapted to engage said 'detent to lock the shift lever when the latter is shifted, said detent acting to cum back the latch during the shifting operation until the latch can snap into interlocking engagement with the det'ent, an offset on the latch, an arm, with a stop thereon, pivoted on the shift lever and normally held in an angular position to cause the stop to be interposed in the path of the'oifset on the latch after the latter has been cammed back, thereby preventing locking of the shift lever when the same is actuated for temporary shift of the platen, and means for-rocking the stopcarrying} arm reversely' to the direction in whloh t 'Qrfshift lever is moved, to prevent the "interpbsition of-the stop in the at-h of the Ofl'setonthe latch when the shi t lever is operated for a sustained shift of the platen. i H z 7. In a typewriting machine, the combination with a shiftable platen, of a shift lever, a. detent on said levcr,'a spring latch ada' ted to engage said det'ent to lock the shi t lover when the latter is shifted, said detent acting to cam back the latch during .the shifting operation until the latch can' snap into interlocking engagement with the detent, anofiset on the latch, an arm, with a stop thereon, pivoted on the shift lever and normally held in an angular position to cause the stop to be interposed in the path of the offset on the latch after the latter has been cammed back, thereby preventing lock-v ing of the shift lever when the same is actutypewritin'g machine, the combiventing locking of the shift adapted to engage said "detent to lock the shift lever when the latter shifted, said detent acting to cam. back the latch during the shifting (nieration until the latch can snap into interlocking engagement with the" detent, an arm, With a stop thereon, pivoted on the shift lever and normally held in an angular position to cause the stop to he interposed in, the path of the latch after the latter has been rammed hack, thereby prelevcr when the same is actuated for temporary shift of the platen, a key for rocking the stop-carrying arm reversely to the direction in which the shift lever is moved, to prevent the interposition of the stop in. the path ofthe latrh when the shift lever is operated for a sustained shift of the platen, and a shoulder on the stop-carrying arm, which when. said arm is rocked as aforesaid, engages theshift lever so that the latter may be operated by means of said key.

9. In a typewriting machine, the combination with a shiftable platen, of a shift lever, a detent on said lever, a spring latch adapted to engage said detent to lock the shift lever when thelatter is shifted, an arin, with a stop. thereon, pivoted on the shift lever and normally held in an angular posh tion to cause thestop to be interposed in the path of thelateh When the shift lever is actuated for temporary shift of the platen, means for rocking the stopcarrying arm to prevent the interposition of the stop in the path of the latch When the shift lever is operated for a sustained shift of the platen, and means for holding saidinterposed stop against said detent on the shift lever to determine the normal position of-said rockarm.

10. In a typewriting machine, the combination With a shiftable platen, of a shift lever, a detent on said lever, a spring latch adapted to engage said detentto lock the shift lever When the latter is shifted, an arm,

-with astop thereon,pivoted on the shift lever and normally held in an. angular position to cause the stop to be interposed in the path of the latch when the shift lever is actuated for temporary shift of the platen, means for rocking, the stop-carrying arm to prevent the ll'llll)FPOSitlOI'l of the stop in the p'tli of the latch whenthe shift lever is ted for a sustained shift of the platen, ring for holding said interposed an. inst said deteuton the shift lever to rn'iinc the normal. position of said rock- 11. n nation with a shiftable platen, of a shift t ll'iercfor, a stop-carrying arm pivoted to shift lever and normally held in such an; 1 ar posltiol'l thereon that actuati n of llll, --lii l t lever, for a ten'iporary shift lever, a loci oflh plaler'i, causes the stop'on said arm to I a second shift lever,

In a, typcwriting machine, the combi-i be interposed in the path of the lock, means for moving said arm on its pivot in the opposite dirertio n to cause the stop thereon to be held where movement of -the shift lever cannot bring it to the path of the lock, means for throwing the lock, for sustained shift of the platen, when the shiftlev'er is operated with the stop thereon in ineffective position, and means operated thereby to disengage the lock from the first mentioned-shif; lever.

12. In a typowriting machine, the cofnbh nation with a shiftable platen, of a shift lever, a lock therefor, a stop-carrying arm pivoted to the shift lever and normally held in such angulai position thereon that actuation of the shift lever, for a temporary shift o'fthe platen, causes the sto on said arm to be interposed ii the path 0 the lock, means for moving said arm on its pivot in the ope held Where movement of the shift lever cannot bring it to the path ofjl the lock, means for throwing th i look, for sustained shift of the platen, when the shift lever is operated With the stop th areon in ineffective position, a rock shaft to which said lock is secured a cam secured to said shaft, avsecond shiftlever, and means thereon for engaging said cam to rock said shaft to disengage the look from theifirst-mi ntioned shift lever.

13. In a typev riting machine, the combination with a siiftable platen, of a shift lever, a lock the 'efor, meansffor automatically shifting sa d lock to a predetermined position at each ictuati'on ofithe shift lever, a second lever 1" ivoted at an; intermediate point. thereof to .itlld shift lever, a keyca'r ried by one arm of said second, lever, a stop carried by the ot ier! arm of said second 1e.- ver, means for normally holding said stopearrying lever in such angular position on to effect temporiry shift' the platen causes said stop t( be interposed in the path of the lock after said lockithas been so shifted, so as to r( nder the lock inoperative,

the shift lever that" operation? of the latter sustained shift of he platen, and means for throwing thelock when the stop is so. withheld from the Patl thereof.

14-. In a typewliting machine, the combination with a shiftable platen, of a shift lover, a lock there "or, means for automatically stfting said lock to'a predetermined positio.- at each aci ration of the shift lever; a second lever pi otedilatanintermediate point thereof to sa (1 shift lever, a key ear-d 1- (l by one arm of, said second lever, a stop,

carried by the otleuarm of said second lever, means for n01 mally holding said stopcarrying lever in such angular position on the shift'lever that operation of'the latter to effect temporary shift of theplaten causes a said stop to be interposed in the path of the look after said lock has been so shifted, so as to render the lock inoperative, a shoulder on the stop-carrying lever to engage said shift .lever .when said key is depressed so that by means of said key both levers may be moved as a unit, with the stop-carrying-lever in such angular position on the shift lever as to withhold the stop from the path of the lock, and. means for throwing the look when the stop is withheld from the path thereof, for a sustained shift of .the platen.

15. In a typewriting machine, the combination with a shiftable platen, of a shift lever, a lock therefor, means for automatically shifting said lock to a predetermined position at each actuationfiof the shift lever, a second lever pivoted at an intermediate point thereof to said shift lever, a key carried by one arm of saidsecond lever, a stop carried by the other arm of said" second lever, a projection on the shift lever, a spring for normally holding said stop-carrying lever against said projection in such angular position on the shift leverthat operation of the latter to effect temporary shift of the platen causes said stop to be interposed in the path of the look after said lock has been so shifted, so .as to render the I lock inoperative, means whereby the stopcarrying lever may be held in driving con nection with the shift lever in such angular position thereon as to withhold the stop from the path of the look when the shift lever is operated for a sustained shift of the platen, and means for throwing the lock when the stop is so withheld from the path thereof.

16. In a typewritingmachine, the combination with ashiftable platen, of a shift lever, a detent on said lever,a spring latch to engage said detent to lock the shift lever when the latter is shifted, a second lever pivoted at an intermediate point thereof to said shift lever, a key carried by one arm of said second lever, a stop carried by the other arm of said second lever, a spring 'lcr normally holding said stop against said detent in such angular position on the shift lever that operation of the latter to effect temporary shift of the platen causes said stop to be interposed-in the path ofthe latch to render the latch inoperative, and

means whereby the' stop-carrying lever may be held in driving connection with the shift lever in such angular position thereon, as to withhold the stop from the path of the latch when the shift lever is operated for a sustained shift of the platen; I

, 17. In a typewriting machine, the combination with a shiftable platen, of a shift lever, a detent on said lever, a spring latch to engage said detent to lock the shift lever when the latter is shifted, a second lever pivoted at an intermediate point thereof to said shift lever, a key carried by one arm of said second lever, a stop carried by the other arm of said second lever, a spring for normally holding'said stop against said detent in such angular osition on the shift lever that operation 0 the latter to effect temporary shift ,of the platen causes said stop to be interposed in the path of the latch to render the latch inoperative, and a shoulder on the 'stop-carr in lever to en a o the de- Y g I tent on the shift depressed, so that, by means of said key,

both levers may be moved as a unit, with the' stop-carrying lever in' such angular position on the shift lever as to withhold the stop from the path of the latch.

18. In a typewriting machine, the combination with a shiftable platen, of a shift lever, a detent on said lever, a spring latch to engage said detent tolock the shift lever when the latter is shifted, said detent acting to .cam back the latch during the shifting opver when said key is" eration until the latch can snap into interlocking engagement with the detent, a second lever pivoted at an intermediate point thereof to said shift lever, a key carried by one arm of said second lever, a stop carried by the other arm of said second lever, a spring for normally holding said stop against said detent'in such angular position on the shift lever that operation of the latter to effect temporary shift of the platen causes said stop to be interposed in the path of the latch to render the latch inoperative,

and means. whereby the stop-carrying lever may be held in driving connection with the shiftlever in such angular position thereon as to withhold the stop from the path of the latch when .the shift lever is operated for a sustained shift of the platen.

19. In atypewriting machine, the combination with'a shiftable platen, of ashift lever, a one-armed pivoted spring hook to engage and lock the shift lever, when the latter is operated for a sustained shift of the platen, means for automatically shifting.

said hook to a predetermined position at each actuation of the shiftlever, a stop on the shift lever normally positioned thereon a to be interposed in the path of the spring hook when the shiftlever is operated for ,temporary shift of the platen, so as to provent operatiioh of said hook after having beenjso shifted, and means for moving said stop relatively to the -shift lever to render the stop 'inefi'ective when the shift lever is operated for a sustained shift of the platen.

20.111 :1 typewritin machine, the combination with a shifta 1e laten, of a shift lever. a one-armed pivoted spring hook to engage and lock the shift ltver when the latter is operated for asustained shift of the platen, means for automatically shifting said hook to a predetermined position at each actuation of the shift lever, an arm pivoted to the shift lever having a stop thereon, means for holding said arm norshift lever is operated, thereby permitting the shift lever to be locked for a sustained shift of the platen. i

21. In a typewriting machine, the combination with a shiftable platen, of a shift lever, a one-armed pivoted hook to engage and lock the shift lever, when the latter is operated for a sustained shift of the laten, means for automatically shifting said hook to a predetermined position at each actuation of the shift lever, a stop on the shift lever normally positioned thereon to be interposed in the path of the hook when the shift lever is operated for temporary shift of the platen, so as to prevent operation of said hook after having been so shifted, means for moving said stop relatively to the shift lever to render the stop ineffective when the shift lever is operated for a susthe shift lever so as not to be interposed in the path of the hook when the said projection arrangec to move sai into a predetermined pc sition at each actutained shift of the platen, and means for throwin the hook when said shift lever is operate with said stop in ineffective position thereon.

22. In a typewriting machine, the combination with a shiftable laten, of a shift lever, a detent on the sliift lever, a onearmed pivoted spring hook for engagement with said detent to lock the shift lever when the latter is operated for a sustained shift of the .laten, said detent acting to cam back the ook during the shifting operation until the hook can sna into interlocking engagement with the etent, an arm pivoted to thefishift leverhaving a'stop thereon, means for holding said arm normally :at

such an angle on the shift lever that operation of the latter causes the stop to be interposed in the path of the spring hook to prevent locking movement thereof, and

means whereby the stop-carrying arm may be rocked on the shift lever so as not to be interposed in the path of the hook when the shift lever is operated, thereby permitting the shift lever to be locked for a sustained shift of the platen.

23. In a typcwriting machine, the combination, with a shiftable platen; of a shift lever having a lateral projection thereon;

a latch engage-able with said projection to lock the shift lever when the latter is actuated for a sustained shift of the said projection arranged 'to move sal laten, d latch into a predetermined p )sition at each actuation of the shift lever; an arm pivoted to the shift lever and provided With a stop a pin on said latch adaited for engagement by said stop when said latch has been moved into said position by sa .d projection to pre vent operation of the l: tch; and means for rocking said arm so as to carry said stop out of range of said pin when the shift lever is actuated for a sustained shift of the platen.

24. In a t pewritin machine, the combination, wit lever having a lateral p latch engageable with said projection to lock the shift lever when the latter is actuated for a sustained ;hift of the laten,

' d latch ."o ection thereon; a

ation of the shift lever; an arm pivoted to the shift lever at an intermediate oint thereof and provided :.t one end with a stop and at the other ed with an operating key; and a pin on s: id latch ada ted to be positioned in front of said sto or ena shifta .e platen; of a' shift a gagement therewith, when said atch has been moved into said tion by said ation of the said arm so as to carr said stop out of range of said pin when the shift lever is actuated for a sustained shift of the platen.

25. In a typewriting machine, the combi- I redetermined posiro ection, so as to prevent operatch, said k :y arranged to rock nation, with a shiftable platen; of a shift lever having a projectioa thereon; a latch engageable with said pm jection to lock the shift lever when the latti r is actuated for a sustained shift of the pl aten: an arm pivpair of spaced stops or shoulders between oted to the shift lever a1 d provided with a which said projection has play, one of said a stops arranged to prevent en agement of said projection bysaid latch w ien the shift lever is actuated for a temporary shift of the platen; and means fo' rocking said arm to render said stop inefle :tive for such preventing action when the ;hift lever is actuated for a sustained shift of the platen, and to engage the other stop with said projection to enable subsequent downward movement of said arm and sa rd shift. lever as a unit.

26. In a typewriting machine, the combination, with a shiftable alaten; of a shift lever having a projectiol' thereon; a latch engageable with said prqection to lock the shift lever when the latte is actuated for a sustained shift of the plate 11; an arm pivoted to the shift lever and pro sided with spaced upper and lower stops or shoulders between .which said projection has play; a spring arjection by said latch When'the shift lever is to enable subsenuent downward movement 7 ,actlat d Tori-1 temngparv shidft of the platgn; of said arm and said shift lover as a unit. an means or me mg 5x1 arm to ren er said upper atop inefl'octive for such prevent WILLIAM B HELMOND' 5 inz action when the shiftlever is actuated Witnesses:

"for a sustained shift of the platen, and to' JOHN-J. BASKERVlI-LE, engage the lower stop wlth sald projection SHIRLEY E. GLEDHILL.

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