US1226064A - Adding-machine. - Google Patents

Description

UNITED STATES PATENT OFFICE.

GEORGE COBDTS, 0F NEW YORK, N. Y., A SSGNOR TO CHARLES E. DRESSLER, 0F NET-3f YORK, N. Y.

ADDNG-MACHENE.

Speccation of Letters Patent.

nat-@need May 15, 191e.

Applicatin mea May 1s, 1912. serial No. 698,088.

To all whom t 'may concern.'

Be it lmown that I, GEORGE Coeurs, citizen of Germany, residing at New York, county and State of New York, have invented new and useful Improvements in Adding-Machines, of which the following is a speciication.

This invention relates to adding machines and has in view the production of a machine that is cheap, simple, compact, easy to construct, manipulate and repair and which is not liable to get out of order, all as will be explained in the following description and claims and the drawing, in which- 4 Figure 1 is a top view,partly in section of the machine with the cover removed,

Fig. 2 is a section partly inelevation on the line 2-2 of Fig. 1,

Fig. 3 is a top view of the machine,

Fig. 4 is a side elevation of one `side of a digit wheel, j

Fig. 5 is a side elevation of the other side .of the digit wheel,

Fig. 6 is a transverse vertical section of a digit wheel,

v Fig. 7 is an elevation of the rack and pinion used to set the propelling wheel 0pposite any digit wheel,

Fig. 8 is an elevation of the segment and lever used in advancing a digit wheel any desired number of digits, and

Fig. 9 is a plan view of a disk placed adjacent to a digit wheel.

Referring to the drawing there is shown a container or casing 10, which for convenience may be separable into two or more parts. On the casing 10 are supported two `shafts 11 and 12, the former carrying the digit or adding wheels 13, and the latter carrying a propelling wheel 29, which moves the digit wheels when the operation of addition is carried on. The digit wheels are in the form of toothed wheels having the successive digits 1 to 9 and 0 on the apex of the teeth as shown in Figs. 1 and 6. On the left 4side of each of the digit wheels is placed a disk 15, which has a circular portion 16 and a flat portion 16 at its periphery, and a projection 17 fitting' in a corresponding groove 22 in the shaft 11 so that it Will rotate with the shaft.

A pawl 18 pivotally carried on the side of each bdigit wheel rests on theperimeter of the disk 15 and is caused to yieldingly engage therewith by a spring 19. When the pawl moves on the edge of the circular porof a wheel 25, which is fixed to a disk '24, both revolubly mounted on the shaft l2.

Fixed to the shaft 12 is a ratchet wheel 27 having ten teeth 28. A pawl 35 pivotally carried by the disk 34 is caused to engage with the teeth of the ratchet wheel 37 by a spring 36. Mountedon the shaft 18 to have axial adjustment `thereon and rotate therewith is a wheel 29. This wheel has teeth 30 adapted to mesh with the teeth of either of the digit wheels 13 and impart movement to the latter when the shaft 12 is rotated in anti-clockwise direction. The segment 23 is moved forward and backward by a lever 24. As it is moved forward it will rotate the pinion 25 and connected pawl carrying disk 34 the pawl 35 riding over the teeth of the ratchet wheel 27 and as the Vlever is returned to initial position the pinion 25 will be rotated in a reverse direction and the pawl 35 will engage with the teeth in the ratchet wheel 27 rotating the shaft 12 and thereby the propelling wheel 29. The wheel 29 is adjusted on the shaft 12 by a rack 37 connected at one end t0 a plate 4() which is mounted on the hub 41 of the wheel 29 and held in place by a plate' 42, the rack being actuated by a pinion 38 meshing with the rack, said pinion being fixed to a shaft which is rotated by a milled head 39 fixed thereto.

The digit wheels 13 are frictionally held in adjusted position by the springs 43v pressing against pins 33 extending laterally from the teeth of the wheels. `To the right of the digit Wheels 13 is a disk 44 having an indentation 45 into which fits the top of a lspring 46 whichpresses against it and gir-:es

to the-digit wheels. a definite and accurate zero position when the hub of the spring 4G engages inthe indentation ll5.

On the top of the casing there is a slot 47 through which are visible the various numerals or digits von the apex ofthe teeth of the Wheels 13 as they are revolved. There is also a slot 48 in the casing in which moves an index or projection 50 extending from the plate 40 connected to the propelling Awheel which indicates opposite which digit wheel the propelling wheel 29 is placed, a row of numerals 49 adjacent to the slot being provided for the purpose. l

".he'leVer 24 moves in a slot 51 in the casing,l a series of numerals 52 indicating the extent to which the lever should be moved to rotate the propelling lwheel a pre-determined number oftooth spaces. In order to return the adding wheels to' zero position the @shaft 11 is rotated by a milled head -53,

a pawl pivotally` carried by each digit wheel falling into the slot or groove 22 in the' shaftand thereby coupling said wheels to the than. j

The operation of thel machine is as follows; The propelling wheel 29 is first broughtopposite the desired digit wheel 13. If units are desired it is adjusted so that the teeth of such wheelwill be in connection with the teeth of the first digit wheel; if tens are desired it is adjusted tocop'erate withl the second digit wheel, etc. After the propelling wheel has been properly adjusted the lever 24 is pulled .forward until it is opposite the digit or numeral on the scale 52 .corresponding to the number to be added, and is then returned to initial position. Simultaneously with the forward movement of the lever the pinion 25 and connected pawl carrying disk 34 is rotated causing pawl' to ride over the teeth ofthe ratchet Wheel .27, and upon the return movement of the leverth'e pinion 25 and disk 34 are rotated in opposite direction causing the pawl to engage with`t the ratchet wheel 27 and operatively connecting the propelling wheel to the pinion 25, requisite number ofV steps or tooth spaces and through. 'it the corresponding digit wheel, and .the number opposite which the lever 2a is placed is added and indicated by the digit Wheels through the slot a7. Units, tens, hundreds and all other denominations are added in the same manner. When the figure added produces a sum above ten the pawl 18 acts on the ratchet wheel of an adjacent number Wheel moving it forward'one step whereby in each case addition of figures of any denomination is carried on beyond the nine digits of each digit wheel. In the setting of the numerals at zero the milled head 53 1s rotated thereby rotating the shaft 11, the variousA pawls 54 drop intol the slot 22 in the shaft whereby thewheels and is turned the casing; a plurality are coupled thereto,the head 53 being rotated until all of the digit wheels assume the zero position which will be indicated through the slot '47 when a new adding operation may be repeated` lVhat I claim as new is:

1. In an adding machine tlie combination of ashaft; a plurality of ,toothed wheels having digits on the apex of the teeth mounted on said shaft in juxtaposed relation; atoothed'propelling lwheel rotatable and adjustable on an axis parallelwith the axis of the digit in one direction; means carried by the digit wheels cooperating when made a complete revolution to advance the next adjacent digit wheel of higher denomination one tooth space, compr1sing a pavvl carried upon the side of each digit wheel, a

disk having a lat portion fixed on the shaft the perimeter of which disks the pawls engage, and a ratchet wheel connected to the side of the wheel of the next higher denomination With which the pavvls coperate as they pass over the flat portions oi" the disks; Vmeans to manually rotate the digit wheel shaft; and a pawlA carried by each of the'digit wheels to cooperate with a longitudinally extending groove in the shaft to return all of the digit Wheels to initial position. l

2. An adding machine, comprising in combination a casing, a plurality of juxtaposed toothed wheels having digits on the apex of the teeth mounted in the'casing to have independent movement in one direction 5 an opening in the casing with which axially alined digits on the digit wheels are adapted to register `means carried by said wheels and operable When the Wheels have made a complete revolution in one direction to advance the next adjacent wheel of higher denomination one toothI space; a'shaftvextending -parallel with the axis of the Said digit wheels; a toothed Wheel mounted on said shaft to have adjustment along the same and numerals on the casing to indicate the sition of said wheel with relation to .the digit wheels;v manually operable means to adjust such wheel along its shaft; and a lever to impart movement to the shaft and connected wheel, substantially as and for the purpose specified.

8. An adding machine comprising in combination a casing; a shaft journaled in said of juxtaposed toothed wheels having digits on the apex of the teeth loose on said shaft and have independent movement on the shaft; an o ening-in wheels to advance the digit Wheels a digit wheel has wheel to extend throughj'an.

.theoasing'througb which'an yahncd 10U naaepea row of digits of the digit Wheels are adapted to he exposed; a toothed propelling wheel adjustable along an axis parallel with the axis of the digit wheels and adajivii'ed to mesh With either one of the latter Wheels to advance said Wheels in one direction, said Wheel having means to project through an opening in the casing to indicate the position of said Wheel; means to rotate said Wheel a predetermined distance, means car` ried by the digit Wheels to coperate when. a digit Wheel has been actuated by the prf peiling Wheel and made a complete revolution to advance the adjacent digit wheel of the next higher denomination one tooth space; means connected to the digit wheel shaft to manually rotate the same; and pawls carried hy the digit Wheels to engage in a longitudinal groove in the shaft when the digit Wheel shaft is rotated. in a direction reverse to the movement of the digit Wheels imparted thereto by the propelling' wheel .to return the digit Wheels to Zero position.

et. An adding machine comprising in conloination a casing; a shaft journaled in said casing; a plurality of juxtaposed toothed Wheels having digits on the apex of the teeth loose on said shaft; an opening in the casing through which an axially alined row of digits on said Wheels are adapted to he exposed; a shaft in the easing extending parai lei With the axis of the digit Wheels; Va toothed propelling Wheel slidably mounted on said shaft and to rotate therewith; mear i to adjust said. Wheel along its shaft to canse it to mesh with either one of the digit Wheels; means connected 'to said propelling wheel projecting through an opening in the caeii. u dieate the position of said Wheel; nieans carried by the digit Wheels to cooperaie when a complete revolution has been inn :rted to a digit yheel in one direction to adranee the adjacent digit Wheel of the next higher dei'iomination one tooth space; and means to rotat the propelling shaft, com.- prising a toothed segment having a lever, a pinion with which said segment meshes loose on shaft et the propelling wheel, a paWl carried h v said pinion, and a ratchet wheel fixed en the shaft of the propelling Wheel 'with which the paWl cooperates When the segment is moved in one direction to couple the pinion to the shaft, substantially as and for the purpose specified.

lo. testimonj7 whereof, I have signed my naine. to this specification in the presence of two subscribing Witnesses, this 15th day of any wie.

Geenen CORDTS.

'A itnesses:

C. A. t). ft-esami, CARL LAHR.

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