US870184A - Computing-machine. - Google Patents

Description

4 SHEETS-SHEET v1.

,184. PATENTBD Nov. 5, 1907.

A. w. KRAHN. COMPUTING MACHINE.

APPLICATION FILED HAY 4,1908.

No. 87o

WITNESSES 1'/ 2@ g, fw

THE Nmuus PETERS ca., wAsHmm-anl, DA c.

v Wm E 4 SHEETS-SHEET 2.

INVEN PATENTED Nov A. w. KRAHN. COMPUTING MAUHINB.

APPLIUATION FILED HAY 4. 1903.

BYM A TTORNE YS,

WTNESSES.'

nu: NoRRls PETA-ns ca, w/lsHlNcroN, n. c.

No. 870,184. PATENTED NOV. 5, 1907. A. W. KRAHN.

COMPUTING MAGHINE.

APPLIUATION FILED HAY 4,1908.

4 sums-sum1' s.

TTORNE mi PATBNTED' NOY. 5, 1907.

v A.' w. KRAHN. COMPUTING MAoHINn APPLIUATION FILED HAY 4,1903.

y4 SHEETS-SHEET '4.

@[Zfo. 4

SaS/Goni4 RA/Erg,

PATENT OFFICE.

ALVIN W. KRAIIN, OF MILWAUKEE, WISCONSIN.

COMPUTING-MACHINE.

Specification of Letters Patent.,

Patented Nov. 5, 1907'.

Application filed May 4c. 1903. Serial Nox 155,518.

To all 'whom it may concern:

.Be it known that I, ALVIN W. KRAHN, a citizen of the United States, residing at Milwaukee, county el Milwaukee, and State of Wisconsin, have invented new and useful Improvements in Co1nputingMachines, of which the following is a specification.

My invention relates to improvements in computing machines.

The .object of my invention is to provide practical and eliective mechanism for mechanically solving problems in addition and subtraction and indicating the result visually, also for making and preserving a printed record of the various amounts entering into such problems and the totals thereof, the machine being adapted to receive and compute all the digits constituting a given number simultaneously.

In a former patent issued to Alfred J. Meyer, dated August 27, 190l, and numbered 681,240, certain features similar to those herein described are disclosed, and in some respects the present machine embodies structural improvements upon the mechanism shown in said patent.

In the following description, reference is had to the accompanying drawings in which,

Figure 1 is a plan. view of the invention, with the casing partially broken away to show the recording mechanism. shifting mechanism of the record sheet holder. Fig. 3 is a vertical longitudinal sectional view. Fig. 4 is a detail view, in plan, of the registering wheels and transferring mechanism. Fig. 5 isa detail rear view of the transferring yokes and their connections. Fig. G is a detail side view of the mechanism for communieating motion to one of the registering wheels. Fig. 7 is a detail view of the mechanism for manipulating the zero types of the printing mechanism. Fig. 8 is a detail view of the mechanism for operating the inking ribbon. Fig. 9 is a detail view of a portion of the transferring yoke and pawl. Fig. 10 is a detail view of a modified construction used for printing totals. Fig. 11 is a detail o the same, as seen from the front or inner side. Figs. l2 4and 13 are detail views of the units and tens wheels respectively drawn on a section line cutting the shaft of the registering wheels in a plane between the transferring cams of the units wheel, and the ratchet of the tens wheel, and showing the transferring mechanism, and a portion of the primary actuating mechanism of said wheels. Fig. 14 is a detail View of one of the registering wheels with its ratchets and cams, a portion of the registering Wheel being broken away to show the interior ratchet which is engaged by the stop 32. Fig. 15 is a detail face view of one ofthe printing segments.

Like parts are identied by the same reference characters throughout the several views.

The machine is provided with an inclined key board Fig. 2 is a view, in elevation, of the.

A and vertical stemmed push button keys, arranged in rows and numbered from l to 9 in each row, as best shown in Fig. l. The right hand row represents the units column, and the next row the tens column as usual in such machines.

A registering wheel 10 is provided for each row of keys, the several Wheels being mounted on a supporting shalt 11 but turning independently thereof. The periphery of each registering wheel is provided with two successive sets of digits, ranging from O to 9 inclusive, and the Wheel is rotated from any one ofthe corresponding row of keys through the medium of the key, push rods 12, elbow levers 13, sliding bar 14, segment carrying lever l5, toothed segment 16, pinion 17, pawl carrying disk 18, pawl 19 and ratchet hub 20, the latter heilig rigidly connected with the registering wheel. The below levers pertaining to each row of keys are provided with arms graduated in length to correspond with the numerical importance of each key, the difference in the length of each arm being multiplied in the segment lever 15, which is fulcrurned at 22, below its center, and carries the segment 16 upon its longer arm. The lower ends of the elbow lever arms are disconnected from the bars 14, but each bar is provided with a lateral projection 24 located in the path of each lever of its corresponding set, whereby the depression of any one of the keys will actuate the bar independently of the other keys and elbow levers. The bars 14 are retracted by springs 26, and the e'lbow levers and keys are retracted by springs 27.

As each registering. Wheel is loose upon the shaft 11 and rotated by pawl and ratchet mechanism, it is desirable to provide a positive stop to limit the rotation of each wheel to the exact distance of key adjustment. To accomplish this result, bars 30, parallel with the bars 14, are each provided with an arm 31, having a catch 32, adapted to be moved into engagement between the teeth of a wheel 33 on the hub 20, the same being normally held out of engagement with such teeth by a spring 35, connecting bar 30 with the frame. The bar 30 is provided with lateral projections 37, one for each elbow lever 13 of the corresponding set, and these projections are arranged to be engaged by the elbow levers during the final key movement, thus pushing the catch 32 between the teeth of wheel 33 and locking the registering wheel against further movement after the completion of a key stroke until the key is retracted suciently to permit spring 35 to retract bar 30 to normal position. A dog38 prevents a backward rotation of the ratchet hub 20 and registering wheel.

Automatic transferring mechanism is used to advance each of the registering wheels, (except the unit wheel), step by step from the wheel of next lower value, whenever the latter has registered ten numbers, commencing with the zero or cipher character. This transferring mechanism is arranged to perform the -catch 56 into position for such engagement.

transferring or carrying operation during the return stroke oi the keys, so that it will not interl'ere with the direct advancen'ient ol any or all ol' the wheels by a simultaneous stroke oi keys ol' dill'erent sets. complish this each registering wheel is provided with cam disks 40 and 4l,-one such disk heilig used for each series of digits on the wheel. Each disk 4() is arranged to oscillate a yoke 44 on a cross rod 45 through the medium oi a yoke arm 4.(5 in lrictional contact with the disk, the yoke being thus osciilated in opposition to a spring 4.7, connected with an arm 48 oi the yoke. Each disk 4l is arranged to operate a similar yoke 5() having arms 46 and 48/ and also a spring 47 operating in opposition to the cani'. The cam 40 and yoke arm 4G are located in a dill'erent plane from the cani 4l and yoke arm 46", so that each cani will actuate but one ol the transferring yokes. Two cams 40-41 and corresponding yokes are provided for the reason that the transferring operation is delayed by a trip latch until the return stroke oi the keys as hereinafter explained, and therefore ii a single cam were employed the addition of a number 9 to a number 9 would not only move the greater radii oi the cam into and out oi .contact with the yoke arm 46, but would rotate the cam to a position ior again actuating the arm 46 and prevent the reaction of the yoke at the time of trip latch release. In such case the yoke would oi course be kept from actuating the wheel oi next higher value. But by providing registering wheels with two sets of digits, and two alternately acting cams', and transferring yoke levers for each wheel, acting in alternation upon the succeeding wheelfit is obvious that neither of the cams can ever occupy a position where it will interiere with the yoke reaction, for the two cams are brought alternately into and out oi yoke actuating position for succeeding sets of digits. The yoke 50 is made smaller than the yoke 44 and located Within the latter to produce a compact structure. Otherwise the construction of the yoke 50 and its connections is the same as that of the yoke 4G and its connections. Each yoke carries a pawl arm 53, which is adapted to actuate the ratchet hub 20 of the registering Wheel of next higher value to that from which such yoke is operated, and sufficient power is stored in the yoke spring 47 during the oscillation of the yoke to advance the higher value registering Wheels one step,

whenever the yoke arm 46 passes from the long to the short radius oi the cam. The spring is, however, held from immediate reaction by a trip latch 55 which engages a catch 56 on the outer portion of the paWl arm 53 and holds the pawl until the iinal movement of the operating key or keys on the return stroke permits the release oi the latch, as explained below.

The trip latches 55 for all the registering wheels are rigidly connected with a frame rod 58, which is journaled in the frame at 59, and each latch is provided with an arm 60 in the path oi a lateral projection 6]. carried by a corresponding segment lever l5, whereby the registering stroke of any key depresses the corresponding arm 60 through the medium of a projection 61 and oscillates the rod 58 to adjust the latches 55 in position for engagement with the catches 56 oi anyl yoke oscillated by a cam disk sufficiently to bring its When the key or keys return to normal position, the projections 6l are withdrawn from their position oi engagement with the arms (l0 and the latches 55 are then depressed by a spring 64, thus permitting the operation of the pawls ol' such yokcs as have in the meantime been also released by their respective cam disks. The pawls 58 are held in engagmnent with the ratchet hubsl by springs 65.

it will be observed that each pawl arm 53 is eX- tended beyond the catch 56 over an eccentric shalt 67, When the latter is adjusted through the medium oi the handle (i8, with its greatest radius under the arm 53, the outer end will be elevated in opposition to spring 65 to hold the pawl ironi the ratchet hub and render the transferring mechanism inoperative. Operations in. subtraction can then be performed by depressing keys representing the difference between the number to be subtracted and the next higher number which may be indicated by ciphers i'or all but the lett hand ligure. For example, assuming that the registering wheels indicate the number 76 and that it is desired to subtract the number 68 therefrom. The difference between 68 and 100 is 32, The transferring mechanism being rendered inoperative by the shait 67, the initial registering wheel is advanced two numbers and the tens registering wheel is advanced three numbers in the same manner as ii the number 32 were to be added. The indicated result however, will be the numeral 8, ier the initial registering Wheel will have been advanced from 6 to 8, while the tens registering wheel will havebeen advanced from 7 to O without actuating the hundreds wheelas it would do if the carrying mechanism were in its normal operative position. In this application however, l donot claim the transferring and subtracting mechanism, this being made the subject oi a separate divisional applican tion, and for the purpose oi this application therefore,

either the above described mechanism or that shown in the aforesaid patent to A. .l Meyer may be employed.

To secure a printed record, each lever l5 is provided with an arm 70, projecting rearwardly from its ulcrum as a center and carrying a segment 7l, containing numerical types. When one of the levers l5 is actuated, the segment 7l is lifted, and the numerical types being spaced to correspond with the differentiation secured by the keys, it will be apparent that types can thus be brought into registry with a platen or printing roller 75 in correspondence with the values of the actuated key. The arms 70 are made to converge, as shown in Fig. l, in order that the numbers may be compactly printed.

The platen and a roller 76 in normal contact there- With are used to support and advance the sheet. An ink ribbon7 supported on spools 77 and 78, is interposed between the platen and the segments 7l, t'. e.-between the record sheet held by the platen and the segment 7l. When the segment types are in position, an inward movement of the platen will cause an'impression of the type to be made upon the record sheet. Such motion is communicated to the platen through the medium oi a printing key 80, sliding bars 8l and platen supporting levers 82, the platen being then automatically returned to its normal position by a retracting spring 83, connected with the bar 8l.

A ratchet feed is used to advance the record sheet between' the printing strokes of the platen. This conlocating the bar 92 in such a position that it will not 'shoe to a considerable extent.

the types will therefore not rub and blur the record sists of a ratchet wheel 85, connected with roller 7G, a i pawl actuating lever 86, fulcrumed to the frame, with a spring controlled pawl 87, engaging the wheel 85, and a lug 88 on a lever 82 adapted to impinge on the pawl actuating lever 86, below its fulcrum, during the return stroke of lever 82. In this manner the pawl is actuated to rotate the ratchet wheel and roller 7b' sto p by step.

To hold the segment 71 in its elevated position pend ing the printing operation, the arm 79 is provided with a toothed bracket segment 90, the teeth oi which are engaged by a spring actuated lever pawl 91. This pawl is made to release the bracket after the printing operation by'a bar 92 on the bar 8l, which engages in a notch 93 in a shoe 94 pivotally carried by the pawl 91 below its iulcrum, whereby the pawl is retracted iron: thi.` teeth of the bracket. During the printing stroke of the bar 81 the bar 92 is carried past the notch 9?, in the The initial backward movement of the bars 81 therefore retracts the platen before the cross bar 92 is brought into engagement with the shoe 94. The type segment is thus left iu its elevated position until the platen is moved away from ir, when the continued backward movement of the bar 81 brings the cross bar 92 into engagementin the notch 93 of the shoe 94 and actuates said shoe to release the pawl 91 from the bracket and permit the return of the type segment to normal position by gravity. lSy thus actuate'the shoe 94 during the initial backward move ment of the bar 81, 1 am enabled' to provide for thc withdrawal of the platen from contact witli the type segment before the latter drops to normal position, and

sheet during the downward movement of such segment. The linal downward movement ofthe arm brings the lower end oi bracket 90 into contact with shoe 94 on the opposite side of the pivot from the notch, and thus lifts. the notched end of the shoe to release the bar 92.

It is desirable that the cipher types carried by the segments 7l should not print upon the record sheet at the left of the left hand numeral of value, While those, at the right oi such numeral should be included in the printing operation. '1 `o accomplish this, the cipher types are independently mounted on blocks 96, which are supported from the respective segments 71 by flat springs 97 which normally hold the types out of the line -of platen pressure. They are adjusted into printing position by curved levers 98, pivoted to the frame at 99, and actuated from the corresponding arms 70 of the type segments by laterally projecting rollers 100 carried by said arms. The levers 98 are slightly recessed at 101 to receive the rollers when the latter are in normal position, but when the arms 70 arc raised, the rollers move out of the recesses 101 and push the levers 98 inwardly to adjust the corresponding cipher types to printing position. Each lever 98 carries an arm 103, which projects laterally along the inner surface of the next lever at the right, whereby the operation of any of the levers 98 causes a simultaneous operation of all similar levers at its right in the direction of cipher type adjustment.

In order that the record sheet may be shifted, a rod 110, upon which the roller 76 is mounted, and which serves as a fulcrum for the levers 82, is mounted to slide longitudinally in the roller and in frame bracket bearings 111,.(see Fig. 2), which brackets prevent a longitudinal movement of that roller. The shaft is extended and carries end bars 112 which support the platen 75 and are also connected with a bar 113 on the other side of the rod 110 from that occupied by the platen. 'lhe bar 113 is provided with notches 114 in which resilient stops 115 are adapted to engage, the latter being connected with the levers S2 through which the bar 113 is also mounted to slide. With this construction, the

record sheet may be manually shifted laterally with the platen whenever a record column is completed.

'lhe notches in the har 113 serve as an index to the lateral adjustment required, and the platen is provided with a knob .1.16 whereby the sheet may he shifted from one end to the other when a new column of figures is to be started. i n

1n Fig. 8, meau's are shown for shifting the ink ribbon 120. Each spool shal't is provided with a ratchet wheel 121, and pawls 122, pivoted to levers 123 and 124 respectively, are used to rotate the spools. The levers 123 and 124 are each provided with a slot at 125 through which the ribbon passes, and the ribbon is provided with a knot or other suitable projection at 126, near cach end,`

lof such size that it will not pass 'through the'slot, but

will actuate the lever to push the adjacent pawl into engagement with the teeth oi the corresponding ratchet wheel 121. The levers are connected by a link 128, whereby the ratchet engaging movement of one lever disengages the other, and thus reverses the movement of the spools and ink ribbon. 129 is a spring, engaging the pawls and holding them resilientlyin position for engagement with the ratchet teeth, To actuate the pawls and advance the ratchet teeth st ep by step, the bars 81 are each provided with a lug 130, (Fig. 3), which engages the rear end of the corresponding pawl to actuate-the latter upon its pivot and advance the spool ratchet wheel step by step when in engagement there I with. The ratchet wheels and spool actuating mechanism are located at the base of the machine7 While the spools and ribbon are located at a higher point and the slotted ends of the levers bent upwardly to engage the ribbon. In F ig. 10, I have shown means for printing totals upon the record sheet. Where this is to be done, the arms 70, which support the type segments 71, are not connected positively with the levers 15, but are pivotally connected with the iulcrum shaft 22 and operated from the adjacent levers 15 by hook brackets 132, connected with the levers 15 and arranged to engage underneath the arms 70, thus actuating said arms simultaneously with themovement of the corresponding levers 15 and also permitting an independent adjustment of said arms. To adjust the arms 70 independently, cam Wheels 135 are mounted upon the hubs of the registering wheels, and each arranged with graduated radii, corresponding in length with the numerical value of the numerals on the registering wheel from which it is supported. A key 137 is connected to oscillate a rock shaft 139 for printing the totals, and this rock shaft is provided with arms 140 to which levers 141 arepivotally connected. One such lever is provided for each cam wheel, and arranged With its upper end in position to bear on the eccentric periphery oi the cam. The throw of the other end of the lever is determined by the length of the radius of the cam wheel at the point of lever contact, the

V'each have two sets of digits, the shaft is provid ed with cam serving as a iulcrum for the lever, and as each lev er l is separately pivoted to an arm 140 of the shaft 139, it is obvious that the throw of each will be governed entirely by the position of the cam.

Each of the bars is provid ed with an elbow arm 145 which projects downwardly from the point oi' attachment to the shaft 22, in the path ol' the lower end of a corresponding lever '141, whereby, when the latter is actuated, the arms 70 will be lifted to adjust the type segments into a position to expose types for printing Which correspond with the numbers on the registering wheel which are simultaneously exposed at the sight opening, and represent the total amount registered. As the throw of each lever is governed entirely by the position of the cam on its corresponding registering wheel, each cam serves as a fulcrum for the lever. lt is ohvi ous that the movement of any type segment actuated from the keys 137 will be proportionate to the radins of the corresponding cam wheel 135 at the point oi' its ful crum bearing contact with its respective lever 14]..

As above stated the radii of the cam wheel at the points of ulcrum bearing contact with the lever are in proportion to the numerical value of the digits on the registering wheel, and it is therefore obvious that with a. proper arrangement of the intervening connections, the type segment may be lifted to expose for printing a type 0i the samevalue as that indicated atthe sight opening for said registering wheel. Thegefore, as the numerals exposed in the sight openings of the several registering Wheels, represent the total of the amounts registered at any given time, the depression oi' the key 137 will cause the elevation of each printing segment independently of. any movement of the levers 15, and as each segment will be thus lifted to expose for printing a numeral type oi the same value as that exposed on the registering wheels, the total amount registered at that time will be printed upon the record sheet.

For resetting the registering wheels 10, the supporting shaft 11 is provid ed with notches 155 for each registering Wheel, and each ratchet hub 2O is provided with an interna] spring actuated pawl 156. The pawl is adapted to engage in the notches when the shaft is rotated in the direction oi registering wheel advancement. The shai t notches for the several registering wheels are in aline- Inent, and the pawls 156 are in the same relation tothe cipher on each registering wheel, so that by turning the shaft until all the pawls have engaged the notches, a uniform adjustment of the registering wheels is secured, and the rotation ofthe shaft may then be continued until the cipliers are exposed at the usual sight slot 157. As the registering wheels, in the construction shown,

two notches 155 for each registering Wheel.

Having thus described my invention, what l claim as new and desire to secure by Letters Patent is,-

1. In a machine of the described class, the combination with number carrying devices` differential levers and niotion transmitting connections between said levers und the number carrying,r devices. of a sliding bnr provided with a stop adapted to limit the movement of the nuxnhor carrying devices; lateral projections on said har in position for engagement by the differentiating levers duringr their final key stroke movement; und a spl-lng.,r normally holding the 'bm' in :1 position to render the stop inoperative; said lmr being arranged to he actuated by the levers to push the stop into operative position.

2. ln a machine of the described class, the combination with number carrying devices, and a set of differentiating levers ior each such device, of two parallel sliding bars l'or each set of said levers, provided with projections in the potins of the levers, and unconnected therewith; land springs arranged to retract said bars; one of sald bars having' motion transmitting connection with the number carrying device, and being arranged with its projection in posilion to receive substaritially the entire stroke of any correspondinr,r lever; and the other of said bars having n stop for the number carrying device, und being arranged with its projections in position for lever engagement only during the completion of the lever stroke, whereby snid slop is held in operative position during n [inni kcy stroke movement and un initial rctrnctive movement.

Il. ln n machine of the described class, the combination ot' :i plurality of registering wheels, each provided with lwo consecutive sets of peripheral numerals ranging from '/,ero to nine inclusive; independent actuating mechanism for each registering wheel; a cam on each registering wheel for euch set of numerals thereon; said cam being graduated in correspondence with the numerical 'value of the several numerals of the corresponding set; and separate motion transmitting connections for each cam, :adapted to communicate motion from such cam to another registering wheel together with means for detaining such motion transmission during the active movement of said independent actuating mechanism.

4. ln a machine of the described class, the combination of n plurality of registering wheels, each provided with plural sets of peripheral numerals arranged consecutively and ranging from zero to nine inclusive; independent actuating connections for each registering wheel; and independent motion transmitting connections for each Set of numerals on each wheel said motion transmitting connections being adapted to communicate motion from one registering wheel to the next; once during euch revolution of the corresponding set of numerals; together with trip mechanism adapted to detain the motion transmitting connections when the wheels are being advanced by their independent actuating connections.

ln a machine of the described class, the combination of a set of registering wheels, means for actuating them independently, n set of independently acting spring op erated transferring mechanisms for transmitting step by step motion from one wheel to that of next higher value, a set of cam projections on the transferring wheel; located to rotate in different planes parallel to the wheel, and arranged with each member of the set operatively connected to independently actu-ate one of the transferring mechanisms in opposition to its actuating spring once during:r each revolution of the registering wheeL--said registering wheel having consecutive sets of peripheral numerals corresponding with the cam projections and arranged with the numeral of highest value in each st substantially coincident with the highest point 0n one of the cnin projections.

ll. In n machine of the described class, the combination with a set of independently revoluble registering'wheels, of :i cam wheel operatively connected with each registering wheel; an oscillating yoke, having an arm in motion receiving relation to the cam and devices for communicating motion from said yoke to advance another of said registering wheels step by step; a set of differentiating levers; connections for separately actuating the registerlng wheels therefrom; and trip mechanism controlled by said connections for detslning the wheel advancing devices ot' the yokes during the operation of the dierentiating levers.

'a'. In a machine of the described class, the combination with registering wheels, differentiating levers, and wheel rotating connections directly operated by the leversof n cam wheel connected with each registering wheel; a spring controlled oscillatory member having an arm arranged to receive motion from the cam wheel in opposition to the spring; controlling said member; pawl und ratchet mechanism for transmitting the reactionary movement of said member `to an adjacent registering Wheel; and trip mechanism, controlled by the differentiating levers, to prevent reactionary movements of said oscillatory members during a wheel advancing movement ot said levers.

S. In a machine of the described class, the combination with registering wheels, differentiating levers, and wheel rotating connections operated by the levers-of an osclllatory member adjacent to each registering wheel connections for moving said member in one direction in correspondence with the rotation of the wheel; member retractingdevices operative at tixed intervals of wheel rotation; connections arranged to communicate motion from said member to advance an adjacent registering wheel one step during the reti-active movement of such member; and devices operated by the differentiating levers, for preventing a retractive movement of said member duringr the wheel advancing movement of said levers.

El, In a machine of the described class, the combination of a set of registering Wheels, means for actuating them independentlyy a set of independently' acting transferring mechanisms for transmitting step by step motion from one wheel to the next, and a set of cam projections on the wheel from which the transfer is made, each ar'- ranged to actuate a single transferring mechanism at a dierent interval from the others, said cam supporting registering wheel having consecutive sets of peripheral nnmerals, arranged with the numeral of the highest value in each set, substantially corresponding in relative position with the highest point on one of the cam projections.

10.V In a machine of the described class, the combination of a set of registering wheels, means for actuating them independently, a set of independently acting transferring mechanismsfor transmitting step by step motion from one wheel to the next, and a set of cam projections on the wheel'trom which the transfer is made, each arranged to actuate a single transferring mechanism at a different interval from the others', said cam supporting registering Wheel having consecutive sc ts of peripheral numerals arranged with the numeral of highest value in each set, substantially corresponding in relative position with the highest point on one of the cam projections, said cam projections being in different planes.

1l. In a device of the described class, a set of registering Wheels each having more than one sequence of peripheral numerals; separate actuating vmechanism for each wheel; a cam wheel for each sequence of numerals; an oscillatory yoke for each cam Wheel, each yoke having a cam actuated arm and one yoke being located within another; springs arranged to retract said yokes, when the cam arm bears on the short cam radius; step by step lmechanism for advancing a registering wheel during the retractive movement of the yoke; together with mechan ism controlling the retraction of the yokes and determining the intervals of such retraction.

12. In a machine of the described class', a set of registering Wheels, segment carrying levers for operating the same; additional type carrying segments connected with said levers; catch mechanism for holding the levers in a position for printing; printing mechanism; and devices connected with the printing mechanism for releasing the catch mechanism.

14. In a machine of the described class, the combination of printing mechanism; type carrying members; and a resilient support for cipher types connected therewith and normally located outside of the line of printing pressure: devices for adjusting the members' to printing position; and other devices independently supported and copcrative therewith, for adjusting the cipher type supports into printing position at the right of the members in printing position; together with a projection on said adjusting devices adapted to engage and actnate the c vpher type adjusting devices.

15. lu a machine of the described class, the combination ot' a sot of type carrying segments; a printing roller in operative relation to the segments; means for reciprocating the printing roller; catch mechanism for holding the type segments in any desired position of adjustment; and devices connected with the reciprocating mechanism ol the printing roller for disengaging the catch mechanism, and permitting the printing segments to return to normal position.

16. In a machine of the described class, the combination with a set of registering wheels and actuatingr levers therefor, ot' a set of type carrying segments operatively connected with the actuating levers of the registering wheels; means for locking the segments in any position to which they may he adjusted by said levers; printing devices in operative relation to said segments; and means, connected with said printing devices, for releasing the segments and permitting them to returnto normal position alter the printing operation.

1T. In a machine of the described class, the combination with a set of registering wheels provided with indicating numerals; a cam connected with cach registering Wheel, with its radii corresponding in length to the value of the numerals on the registering Wheels; a set ot printing segments and a set of key operated levers for actuating said seg1nenis,-said cams being arranged to serve as fulcrnms for the respective segment actuating levers, whereby the throw ot' said levers is regulated by the cams. A

1S. ln a machine of the described class, the combination with a set of registering wheels, of a cam connected with each registering wheel; a set of adjustable type carrying segments; a corresponding set of segment adjusting levers; a set of actuating levers, adapted to communicate motion respectively to said adjusting levers, and key operated connections therefor-, said cams being arranged to serve as fulcrums for said actuating levers, whereby the throw of any one of said levers is determined by the position ot' its corresponding cam fnlcrum,

1f). In a machine of the described class, the combination with a set of registering wheels, each having independent actuating connections, and transferring mechanism comprising a graduated member carried by each registering wheel, a tripping device in operative relation to the graduated member, and a pawl and ratchet in operative relation to the tripping device; of a manually actuated member, adjustable into and out of the paths of the transfer ring pawls, and adapted, in one position of adjustment, to render thc same inoperative.

20. In a machine of the described class, the combination of a set of registering wheels, means for actuating them independently, a set of independently acting transferring mechanisms for transmitting step by step motion from one wheel to the next, and a set of cani projections on the wheel from' which the'transfer is made, each arranged to actuate a single transferring mechanism at a diEerent interval from the others, said cam supporting registering wheel having consecutive sets of peripheral numerals, arranged with the numeral o1' highest value in each set, substantially corresponding in relative position .with the highest point on one of the cam projections, together with means, controlled by the independent wheel actuating mechanism, for detaining the delivery of a transferring movement to the next wheel until after the completion of the active stroke ot the independent wheel actuating mechanism.

In testimony whereof l afx my signature in the presence of two witnesses.

ALVIN W. KRAHN,

Images