US1011125A - Computing-machine. - Google Patents

Description

C. A. JOERISSEN.

COMPUTING MAoHmEf APPLICATION FILED JULY 21, 1911.

Patented Dec. 5, 1911.

2 SHEETS-SHEET 1,

C. A. JOERISSBN.

COMPUTING MACHINE. APPLICATIONk FILED JULY 21, 1911*.'

1,-O1 1,V 1 25. Patented Dee. 5, 1.911.

2 SHEETS-SHEET 2.l

WITNESSES IN VEN T 0R;

. V @250K/mmf i, Y l.

PATENT oEEioE.

'CARL A. JOERISSEN, OF WASHINGTON, DISTRICT OF COLUMBIA.

COMPUTING-MACHINE.

Application med July 21,

To all whom it muy concern:

le it lcnownthat l, CARL A. JOERISSEN, a citizen of the-United States, residing at 1206 F street northwest, in the city 'of .Vashington, District of Columbia, have invented certain new and useful Improvements in Compating-Machines, of Which the. follmving is a specification.

ll'hile this invention is applicable to computing machines in general, it is designed more particularly for embodiment in the type of machine disclosed in United States Letters Patent No. 905,421, granted Becember 1, 1908, upon the invention of Hans Hanson, to which reference is here made for afull disclosureof any part orparts not immediately concerned with the present invention, but which may nevertheless be necessary to rendering the machine completely operative for all its intended purposes. y

The object of the present invention is to adapt machines such as shown in said Letters Patent, for use in subtracting and dividing as well as addingand multiplying.

To these ends the invention consists broadly, in reversing the direction of drive between theregister elements and their actuating elementsl and rendering temporarily ineffective their zeroizing stops so that with any desired lsetting of the `decimal 4order registering bars, it is merely necessary toA adjust the subtraction or division key if theA expressed number is to be deducted (once in subtraction or a number of times in division), whereupon the usual throw of the operating lever will cause the Lrotation of the register dislrs to take place in a direction opposite to that in which addition takes place and the-result will be a subtract-ion or division. 4

In Ithe accompanying drawings`:-Figure 1 is a vertical longitudinal section of that part of the patented computing machine which is immediately lconcerned with the present invention. Fig. is aplan view of part of the computing mechanism. Fig. 3, an end Aview of liig.. Q showing the carrying device. )Figs LL and 5 arealso end viewspof Fig. 2 seen from the. opposite side of Fig. 2. Fig'. 6 is a plan viewlof another embodiment of the carrying device. Fig. 7, an end view of Fig. 6. The followingligures are in larger scale: Fig. 8 is a detail view of the Zeroizing stop by means of Which a register Speocaton oiLetters Patent.

Patented Dec. 5, 1911.

1911. serial No. 639,838.

wheel is arrested "when it reaches itsizero position. Fig. 9 is a detail view of ratchet wheel with its mounting in transverse section. 10, a detail view of the reversely acting pawls and ratchet wheel as inI Fig. 9 adapted to be brought into operation with either one of the pawls. Fig. 11, a plan view partly in section of Fig. 10, with a different shifting device to the` one shown in Fig. 2. Fig. 12 is a modification of Fig. 10 showing two ratchet wheels acting in opposite direction using only onepawl. Fig. 13 is an elevation of Fig.- 1Q. Fig. 14 is a detail view of theuneans for holding the shaft in dilerent axial adjustments. Fig. 15 `is a section in large scale of the ratchet and register wheels vshown in Fig.

For convenience in comparing Vthe present improvements with the aforesaid Let- ,ters Patent 905,421 upon which the illustrated embodiment of the present invention is based, the parts are as far as practical designated by the same reference characters V as in said patent.

The decimal order register bars c, which carry the unit pins 01 are adapted to be depressed, individually, by means whiclrhave been fully described in the above referred to patent for the purpose of determining the throw of the register bars and subsequently the angular rotation of the register' wheels. The operating carriage C11 is' designed to impart forward movement to the register bars, byengagem'ent with the particular unit pins that' arey for the 'time being depressed into the path ofthe bar o of said carriage, and to impart movement in the return direction by the engagement of the bar (,113 with the shoulder 013x. l

On the shaft al, Figs. 1, 2. 12. 13 and 14 is mounted a sleeve a. a represents the regthe sleeve au; A 'number of key pins a. arefixed in a straight line in the shaft al Aand projectingradially on each side thereof. In the sleeve al* are located.v a like numberof L shaped slots on opposite sides, through which the pins aw project into a recess in the adjoining sides of two` oppositely acting ratchet wheels ai, which are joined together as one .and are free `to rotate on the sleeve a, but maybe displaced axially relative to said sleeve by means of said ister wheels, which are loosely mounted upon pins al and shaft al. A longitudinal move-- ment of the shaft a1 'accomplishesthe change from addition to subtraction, Figs. l and 2. One side of the L shaped slot runs parallel with the aXis of theishaft and the other perpendicular thereto. These pins are so located relativeV to the clutch balls t1", jthat with the `ends of the pins standing atthe outer trunnion shank of the L, the clutch balls are forced u by their springs into the spiral groove of t e star wheelsaf; see F ig. 8 but with the Iends of the pins located in the angle of the L slot the balls will be retired. For subtraction the shaft al is thrown outaxially bringing with it the pins am and the ratchet wheels a3* until they come to the extreme end-of the shank of-the L slot. This will. be accomplished by turning the handle D which, having an eccentric a2 will push theV plate D2 outward bringing the shaft @L1` with it. As shown in Fig. 14, the shaft al is ret-ained in either of its two positions by means of a ball clutch. On turning the handle D back the spring d5 will returnthe shaft to its'normal or adding position. A

yielding pawl a4, Figs. 12 and 15, carried by the register wheel a, engages one or the other of saidl ratchet wheels a. Keyed to, said ratchet wheels, so as to always rotate together, is a' pinion (L2 whichreceives its movement, `in the usual manner, from the register bars c, onY the turning ofthe lever 020. `A star wheel a5, Fig.- 8, is rigidly connected'withm each ot' the register wheels, and has` ,ten gtee th .which mesh with a three toothed st'r'wheel al of the carrying mechanism,\see^Figs. 1 and 2. To hold the star wheel L5 1n its position after turning, a dog a actuated by a spring is made to enter between the teeth of the star wheel.

Instead of the double ratchet wheel a, I might use the following arrangement. The register wheelspa are ke ed to the arresting pinions or star wheels a Figs. l0 and 11 so as to revolve with the arresting pinions a5 but tohave a slight axial displacement relay tive thereto. A single ratchet-wheel a3 built in one piece with or rigidly connected to pinion a, engages a paw/1.114, wheny turned `1n one direction', see Figs. 10 and 11, mounted ion said register wheel a, said pawl a* yielding when the ratchet is turned in opposite direction to which` the register vwheel e r is revolvedfor add1t1on.""`o reverse the mo- ;tion of the register wheel a, thiswheel has ment o Bb,

limited by' stops-A2.

to, be displaced axially until pawl a4x engages the .ratchet wheel. a3 simultaneously disengaing pawla". The axial .displacethek register theelea is done by means of one or more combs A which are situated across the machiretparallelwith the yshaft a1"and hasa longitudinalmovement teah A# of ,Sad @ombra equal to .the dis.. tance betweerrthe registerwheels a; and the` teeth grip on' both sides of each register -lrhe spacing of the.

wheel so that the wheel partakes of any movement lengthwise of the comb, which is operated by hand from the outside of the machine and has a spring catch A* to positively hold it in one of two ditferent positions.v A yielding dog a is supplied for each register wheel lengaging between the teeth ot' the star wheel or, as before.

In shaft 0L1A Figs. 2 and 8, inl the same transverse planes as the star wheels and of the same number, are located clutch balls or clutch pins 251.0, which are pressed outwardly by helical springs. Opposite each clutch is a hole provided in the sleeve 0.1K, so that on partial turning ot' the sleeve relative to t-he shaft al, the clutches are made to'retire below the surface of the sleeve.

-A similar' clutch is provided for the zeroizing pinion C At one end of the sleeve a is located a disk C15 which is keyed on the sleeve and serves, assisted by the dog A, engaging one of the two notches in the disk C5, to hold the sleeve in either position for retiring or freeing theclutch balls 1510.

In the normal operation of the machine as heretofore constructed, the outward stroke of the bar c rotated the pinion ft2 and wheel a5 without affecting the register wheel a, which was held in its zero position against backward rotation by the clutch ball t1, but when the register bar c, returned to its normal position, rotation` was imparted to the wheel a to an extent afcurately determined by the length of the outward stroke .of the register bar. Thus movement of the register wheels corresponding to the addition tobe effected, was accomplished. In order te make the register wheels 'susceptible .to backward rot-ation' without reorganization of the actuating parts that have been described, I provide a means for retiring the clutch ball t1 so that the wheel-a can move backward past the zero .point under the out7 ward movement of the register bar 0 and at the same time bring the. ratchet wheel 0:3

yunder the inliuencev of the pawl a, so that the wheel a is forced to move in a backward subtracting direction; but yhen barl c returns to norma-l position,"the wheel a will Y be arrested by the dog a6 andits movement resisted while the pawl adrags over the projections of the ratchet wheel a.

For liberating the ratchets -t1, the revers/ ing ear shown in Figs. 1 and 2 and in de tail 1n Fig. 5 has been provided. A'key/B` which is normally held m its raised position by a. spring 1.3' yhas a. projectin toe B which yengages a pm at one en to a.rocking lever B4. On the sleeve a1 is rigidly atv tached opposite saidlever B, a short finger C so that ivhen the key B is pushed doivn htlie'piiifli5 ivill be depressed and the opposite end of lever B4 raised forcing finger C and sleeve a1* around part of a revolution,so

.that the lclutch balls t1 stand ready to run.

be pressed"outwardly into the spiral groove,

of the Zeroizing pinion CG by the spiing behind it,` until ineeting the offset formed by the register "bar C* will turn the pinion C1 one coinplete revolution` Pinion, sleevefand shaft non lbeing coupled together, the clutches 10 will engage the star Wheels a5 one by one during therotation of the shaft,

depending on their position, and turningtheir respective register Wheels with tliein. 0n the return stroke of the register bar Cf, the pinion (,1 runs free, the register wheels being held stationarv meanwhile by the eii-,

gagenieiit between dogs a. and star Wheel d?. Xear the end of the -return stroke of bar C a projection C2 will engage the finger C3 attached to the sleeve (11X. whereby the ratchet balls 10 willbe forced to retire out of en' gageinent with the star Wheels (L5 and the pinion CG.

lilith the construction above described the ratchet Wheels niaybe operated in a direction opposite to that referred to and may be inade to accomplishall other purposes which are accomplished in other machines as well, so that the niaciii'iie is'adapted by the present invention Fforsubtracting and dividing as Well as adding and multiplying.

`The Ycarrying mechanism consists of a number of fingers a 'and Awfsee Figs. Q, 3 and 4 attached'to a shaft n.14. @15 for addition arepliiced in aspiral on the shaft n. opposite to the corresponding pinions a." commencing from' licfend opposite the digits, so that on revol g the shaft :(211 the digit finger first comesinto' operation,

next the tens, 4thereafter 'the hundredths.4 vThe subtracting fingers L15 Vare placed ina single v`spiral runningfiii the opposite directioi`aiid aeah' oii'eoffset about the thickness tir t i' ooi t ki cut in the circumference fingers to f4the shaft a is dr'aivn out to one side With the same eccentric n.2 by which shaft a1 is operatdtfylhe finger A15'ivill now eoine into engagement with the teeth of pinion (1.9, the 4fingers (L15 simultaneously being brought out of enga-gement.V As 'the spiral of the fin- The fingers sideiof the adding finger" of e'a'cli'pi'nion'n) so to allow, on the rota-VA gers AJ'runsuopposite to the spiral of the fingers f1.1 thel carrying will be operated in opposite direction, ending with the digit register Wheel ,instead of starting'ivitli it. 'l`lie`spring D at one/'end of the shaft (L14 will bring the 'fingers of the .carrying mecha-` nism back to'their normal positionv for adding.' For driving the carrying mechanism t iyo'pinions Daiid D7, Figs-2 and 4;, are provided, in the usual manner oper:v ted by a rack VDS Aengaging both pinions siinultane eiislv.

ivith a spiral 'gioo'veito each of the pinions D and D1. "llhese pinions are placed on the shaft a1* with the spiral grooves running yin opposite directions so that the ball clutch D will engage only one of the pinions at a tinieii'he other'pinion running idle,

fis yshown in Fig. 2 the mechanism is set for adding. By displacing shaft a1* toward theiight of the figure the ball D9 Will be taken out of engagement with pinion D6 and brought into engagement with pinion D7 wvhercby the shaft 1.14, With the fingers will be rotated on the return stroke onlyy of the rack D12, for subtraction.

n Figs. (3 and 7 aidifferent construction of the carrying mechanism' has been shown wherein a single row of lingers A16 is utilized. In this case the fingers A16 have each a hub which surrounds the shaft A14, and

l A L, he shaft n.11 has a siinilar ball clutch Df as the ball clutch" `119above described, this spiral inl the circular Jopening'of the.. pinion'CG. Aif the crank n10 `non" "turnedeach hub has a tooth A12 engaging a recess Amin the hub of the next linger. The recess A1 is Wider than the tooth A12, so that, when the niechanisiii is changed from addition to subtraction, by displacement of the shaft as before, the fingers ,are niade to ro-,

tate slightly on shaft A14, until they are positioned in 'an opposite spiral similar to that formed by the fingers A15 in Fig. 2.

The star Wheel m10, Figs. 1. and Q, of the carrying mechanism has `only .three teeth,

vivliit'h aredirought in niesli with the star ivheel Pof the register wheel of 'the next higher denomination Whenever turned by a finger 115 (or A15 during subtraction). Built in one with the stai Wheel a1 is the carrying pinion (1.?, with nine teetlnsix of Which in pairs, have thfefull'ividth of the pinion. An annular groove ci, however, cuts the teeth in tivo,v for `allowing the idling, subtracting fingers A15 `to pass.` The remaining three teeth. located opposite the teeth of the star vwheel-a10 have the Width limited by said groove and said star ivlieehso'th'at the adding `finger (L15, located on the other side ofv said groove, may vpass lby Without` vturning the pinion n.9,"iintil said pinion has been partially turned by the register Wheel a. For this purpose, a spur AO has been provided ontlie register Wheel @projecting beyond its circumference vand engaging between two of lth'e-i uil teeth ofthe carrying pinion, once for each of its revolutions, or When'` the reg denomination, one space.

ister wheel is turned from nine to zero. The carrying pinion rtf is ther 'turned-by said spur and one of its teeth intercepts the finger 115, so that, on the swinging of thefinger cz the pinion a9 turns, and with it the star vwheel L10 which subsequently advances the star wheel a5 and register'wheel of the next A set of spring operated dogs a-lgis provided engaging between the full teeth of the carrying pinions First: Depress zero key B which in the usual manner will throw the rack@4 into engagement with the operating mechanism. Simultaneously the key B operates the lever B", through projection B and pin B5, impinging finger C whereby the sleeve a, together with the disk 'l5 will bc slight-ly revolved shifting the dog A from one notch in said disk to another. This will allow clutch z510 to run out along the spiral groove engaging the pinio-n CG.

Second: Turn the operating lever C20 by hand or by motor thereby running the zeroif/:ing rack C4 out and rotating the carrying mechanism. This will revolve the reroizing pinion C". with the disk C5 and also by means of the other clutch 251 engage one by one, depending on the position that they happen to have, the star wheels a5 and with them the register wheels a, turning them to nines.V

Third: On the back stroke of-the lever 020 and the rack Ct the projection C2 by means of the finger C3 turnsthe sleeve ab? slight-ly backward to its normalposition when the dog A6 again will engage the rst notch of the disk C5 so that at the end ofthe stroke the clutches tm, both of the register wheels and of the zeroi-zing mechanism will'be retired and made inoperative and the register wheels will all show zero. p

To change the mechanism from adding to subtracting position proceed as follows: Displace axially boththe shafts a anda1 of the carrying and totalizing mechanisms by means of the handle D, eccentric @20. and connecting plate D2. The shaft al will simultaneously displace all the pins al and with them the double ratchet wheels a3* thereby bringing the teeth of the 'subtracting ratchet wheel into engagement with the yielding pawl a* and the adding ratchet wheel out of engagement therewith. By this means the racks c will operate on the return stroke instead of the outward stroke so that the register wheels will revolve in the order from the higher to the lower numbers fory subtraction.

The machine is now rea-dy for subtraction and the following operation has to be performed: A

First: Turn the lever 02 as before when all the racks c thathappen to be in engagement with pins '010 will -run out and revolve thepinions a2 and ratchet .wheels a3",' but as the inclined. side of lthe teeth of the wheels a3* turn toward the yielding clutch, balls t1", the star wheels a5,.register wheels a and the dogs a will remain stationary.

Second: On the return stroke of the cranl' C20 the racks c of the registering mechanism will operate as the teeth of the ratchet wheels as* will now turn the register wheels along with them. The pins 010 lwill thereupon be pushed up in the usual manner.

Third: Contrary to the operation for adding, for subtraction two strokes of the crank will be necessary. On the second stroke, the racks c. now being left behind, as the pins olf have been pushed back on the previous stroke; the pinions a2 will run idle but the carrying mechanism will operate thepinions af by means of the'fingers A15 in the opposite order to what is done in the adding operation, so that the unit ingeriAl will operate last instead of first.. The pinions a9 will. in their turn, revolve the register wheels` fz in the same manner as during the adding operation but in opposite order.

Fourth: On the back stroke of the lever c both the carrying and the totalizing 'mechanisms remain idle.

`If theniechanism shown/in Figs. 10 and 1l with a single ratchet wheel and the two pawls a* and aLX is applied on the machine, the comb A has to be 'shifted' instead of shaft al in a similar manner by means of an eccentric aio or by drawing it out by hand whereby the register wheels a bring with them the two pawls av and a, which then" are shifted, the one out of, and the other .into engagement with the single ratchet wheel "a3, the procedure otherwise being the same.v

I` claim :-v -v 1. In a. computing machine, the combination ofthe registering mechanism, anddriving means for said registering mechanism acting in relation thereto in two directions,

of means for causing the driving connectiens to idle in one direction and to drive the registering mechanism in the other direcfor movement axially into cooperation with either of the displaced parts of the ratchet at will. y

3. ln a computing machine, the combination with the registering mechanism .and the. driving connection therefor, including a ratchet, 'one memberof the ratchet being constructed with two oppositely acting parts and the other member of the ratchet adapted for movement aiiallyinto cooperation with eitherof the displaced parts of the ratchet at will, 'and me n :"*ivinparting such axial movement"coiriprrsing'a comb having lingers engaging s'ai `)art of the ratchet to be displaced.`

4. ln a computing machine, the combina.- tion with the registering means and driving connection for said registering means including a ratchet said ratchet having one of its members displaced and constructed to act in opposite directions; one of said members being? Va diskmniovable axially to bring either of the displaced members into cooperation i at will and means provided to effect such axial movement in both directions of said disk comprising a shaft having radial pins positioned to engage said disk.

5. Inac'oinputing machine, the combination of a shaft, a registering member mounted loosely on said shaft, a clutch between said registering member and the shaft, constructed to arrest relative rotation between said/member and shaft in one direction only,

and means for retiring the clutch to permit rotation of the registering member in the direction normally opposite the clutch.

6. ln a computing machine, the combination of a shaft, a registering member mounted loosely o n said shaft, a clutch betweenl said registering member and the shaft constructed to arrest relative rotation between said member andfsh'aft in one direction only, and means for retiring the clutch vto permit rotation of the registering member in the direction normally opposite the clutch, comprising a sleeve surrounding'the shaft and having an opening through which the clutch works but having movement relative tothe shaft to bringl the opening out of register with the clutch and adapted by said move` ment to depress lthe 'clutch out of operative position. f

7. In a computing machine, thevcombination of a registering member, a shaft upon which said registering member is loosely mounted, a clutch interposed between said member and shaft and constructed to oppose relative rotation between saidimernber and shaft in one direction only, the driving connection of the registering member including reversely acting ratchets, means for substituting one ratchet for the other in the driving connection and means for simultaneously retiring thefclutch between the registering member and the shaft.

8. In a computing machine, a shaft, a registering wheel mounted. on said shaft,l a clutch interposed between said registering wheel and said shaft constructed to oppose relativerotation in one direction only, a sleeve surrounding the shaft rotatable rcla tive thereto and constructed to -retire the clutch between the shaft and registering member, a driving connection for the registering member including reversely acting ratchets; and a connection between said sleeve and said rat-chets adapted to throw either ratchet into driving connection.

9. In a computing machine, a shaft, a registering wheel mounted on said shaft, a clutch interposed between said registering 4wheel and said shaft constructed to oppose relative rotation in one direction only, a sleeve surrounding the shaft rotatable relative thereto and constructed to retire the ,clutch between the shaft and registeriiig member, and a toe rigidly attached to said sleeve, a rocking lever actuated by depress ing a key, said rocking lever coperating with said toe to partly rotate said sleeve in order to put the clutch in action; and a projecting member on the driving rack coperating with another toe also rigidly attached to said sleeve for the purpose o f a partial turn in the opposite direction to put said ratchet arrangement out of action.

10. 1n a computing machine, a carrying mechanism comprising a shaft, a plurality of fingers radially projecting from said shaft; and disposed relatively to each other in a spiral, said fingersvbeing adapted to be shifted on said shaft to form an oppositely running spiral, a carrying pinion actuated by said fingers for the adding operation when said'iingers are rotated in one direction; said carrying pinion being operated for subtraction when said fingers are. arranged in an oppositely runningv spiral and are rotated in the opposite direction.

11. In a computing machine, comprising a totalizing and carrying mechanism, a registering wheel, a spur on said registering wheel projecting beyond itseifrcumference, a set of carrying fingers,l a carrying pinion, said spur adapted to engage, said pinion during its revolutionand to revolve the pinion so as to place. one of lits teeth in readiness for engagementv with one ofsaid fingers vwhen said fingers are turned in ine direction for addition, and in oppositedirection for subtraction.

12. In a computing machine having carrying mechanism, a' shaft, for the carrying mechanism, a plurality of lingers radially projecting. from said shaft and disposed relative to each other in a spiral; and a like number of radial fingers similarly mounted on said shaft but arranged in an oppositely running spiral from the first mentioned 4fingers.

Uso

to the pinion but. Vacting reverscly I v n Y 15. In a computing machine vhaving car- 18. In a computingmachine,havingcarrying mechanism, ,a shaft for the carrying mechanism comprising a plurality of fingers radially projecting from said shaft and disposed relativeto each other `in a spiral and adapted to operate the registering mechanism when run in one direction, and a like number of radial fingers similarly mounted on saidshaft but, arranged in an oppositely running spiral from the first mentioned iingers, and adapted to run idle'when the first set of fingers are in operation but coming into action upon the reverse movement of said'shaft after the displacement axially of said shaft when the/,first set of fingers will rnn idle in both directions.

1i. In a computing machine having carrying mechanism, a shaft for the carrying mechanism, comprising a plurality of iingers radially projecting from said shaft and disposed relativetoeachrother in a spiral, and a like nnmberfof radial fingers similarly mounted on said shaft, but arranged in an oppcsitely runningspiral to the first mentioned lingers, the first set of fingers operating during the adding process and the second acting reverscly during/'the'subtracting process. l

rying mechanisma vshaft for the carrying mechanism, comprising a plurality of fingers radially projecting fromisaid shaft and disposed relative to each other in a spiral; and a like number of radial fingers similarly mounted on said shaft but arranged in an oppositely running spiral from the first-mem. tioned lingers, ,said shaft being adapted to receive rotation in-one direction from a driving rack and pinion, and a reverse rotation from the same rack coperating with' an ojpesitely acting pinion brought into engagement by axialsdisplacernent 'of said shaft y `l 16. Ina computing machine having carrying mechanism, a 'shaft for the carrying mechanism comprising a plurality of fingers radially projecting from said shaft and disposed relative io each other in a spiral ;4 said shaft having a. clutch engaging pinion when running in one direction and idling in the opposite directionj a second pinion adapted tp engage the clntch similarly Copie of this patent may vhe obtained for a. driving I .inve cents each, by addressing: the Washington, D. C.

thereto and said shaft ,only engaging one of said pinions at a time, theother running idle.

17. In a computing machine'having carrylng mechanism, a shaft for the carrying mechanism comprising a plurality of fingers larly to the first pinion but acting reverscly thereto, and said shaft only engaging one of said pinions at a time, the other running idle, both pinions being simultaneously driven by a toothed rack; means for dis-v placing said shaft axially` With the object of releasing lthe clutch between the 'shaft and one of the pinions and making engagement with the other.

1S. In a computing machinehavingcarrying mechanism, a shaft for the carrying mechanism comprising a plrality of fingers radially projecting from said shaft and disposed yrelative to each other in a spiral; said shaft having a clutch engaglng a driving pinion when running in one direction and idling in the opposite direction-a second pinion adapted to engage the clutch similarly to the first pinion, but acting reversely thereto, and -said shaft only engaging one of said `pinions 'at a time, the other running driven by.a toothed rack; means for displacing said shaft axially'wi'th the object of releasingthe clutch between the'shaftand one of the pinions and making engagement idle, both pinions being simultaneously' Ywith theother, an eccentric at one end of I said shaft revolving to cause axial displacement inone direction, and a spring at the opposite end of the shaftreturmng said shaft to its normal or adding position on ,turning the eccentric back into its first vposition. j

'.'The foregoing specification signed at Washington, D. C., this 5th day of July, 1911.

CARL A. JOERISISEN.

In presence bf two Witnesses-v EDWIN S. CLARKsoN, ,v HERMAN JAcoBssoN.'

@Commissioner o! Patents,

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