US1798329A - kuhrt - Google Patents

Description

E. KUHRT March 31, 1931.

TOTALIZER FOR CALCULATING MACHINES Filed Jan. 27, 1923 2Sheets-5heel 1 March 31, 1931. E. KUHRT 1,798,329

TOTALIZER FOR CALCULATING MACHINES Filed Jan. 2'7, 1925 2 Sheets-Sheet 2 Patented Mar. 31, 1931 UNITED STATES PATENT OFFICE ERNST KUHRT, OF LEIPZIG, GERMANY, .ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE FIRM BRUNSVIGA-MASCHINENWERKE GRIMME, NATALIS & 00., .A.-G., OF BRUNS- WICK, GERMANY TOTALIZER FOR CALCULATING MACHINES Application filed J'anuary27, 1923, Serial No. 615,333, and in Germany March 1 7, 1922.

My invention relates to totalizers for calculating machines. It is an object of my 1nvention to provide a particularly simple and efficient totalizer. To this end I provide in combination with each of the usual key-operated racks or with other means to which reciprocating motion can be imparted by operating a key, for instance, a sector, a combination of racks, a gear or gears, eto.,and I wish it to be understood that I am not limited to the reciprocating parallel racks which I shall describe by way of examplea cooperating part, for instance a setting wheel, wh ch may be placed in operative connection with the rack or the like when it is desired to retain an item in the machine. lVhen the rack or the like is operated, the cooperating part will be displaced in proportion to the operation of the rack. If a setting wheel, it is rotated through an angle which is a function of the parallel motion imparted to the rack by its key and the setting wheel is normally permitted to rotate freely and not to interfere with the motion of the rack except when it is desired to operate the totalizer, when the setting wheel is arrested and limits the return motion of the rack to a predetermined extent so that on its return motion it will move through a distance which corresponds to the motion which the rack had performed under the action of its key. Any number of totalizers may be provided according to the number of items it is desired to retain in the machine.

In the drawings afiixed to this specification and forming part thereof a calculating machine embodying my invention is illustrated diagrammatically by way of example.

In the drawings,

Fig. 1 is a vertical section of a calculating machine,

Fig. 2 is a horizontal section,

Fig. 3 is a detail section on the line III-III in Fig. 1, drawn to a larger scale, and

Fig. 4 is an and elevation viewed from the left in Fig. 3.

The calculating machine illustrated by way of example is designed substantially on the lines of the machine described in my copending application, Serial No. 409,748, but it is understood that I am not limited to the adaptation of my invention to this particular type of machine, as my invention might be adapted to other types of calculating machines as well.

Referring now to the drawings, and first to Fig. 1, 1 are multiplicand keys each of which cooperates with a slide 2. The slides are displaced in parallel upon the operation of the corresponding key and are adapted to cooperate with partial products plates so that differential movement is imparted to the slides under the control of such partial products plates. By the differential movement of the slides, calculating wheels are operated.

These parts do not constitute a part of my invention which relates to setting mechanism. Each slide is equipped with a rack 14 on a projection 2' at its front end. A spring 3 tends to move each slide to the left in Fig. 1. Means comprising a cam 4 and levers 6, 7 are provided for moving the slides to the front of the machine, that is, to the right in Fig. 1, against the action of their springs 3 and for releasing them to be returned to their initial position by the springs 3 but this return movement of the slides 2 is limited by the partial products plates which have been moved into active position. Cams 8 and 9 are formed on each slide 2 straddling a shaft 5 on which a calculating wheel 11a for each slide 2 is keyed. Rotation is imparted to the calculating wheels through the medium of the slides under the control of the partial products plates, as explained above, and when the wheels are rotated radial pawls 11 on the Wheels are displaced by the cams 8, 9 through the medium of projections on the pawls which are engaged by the cams 8 and 9, so as to set the multiplication dials 12 which rotate about pins in a spider 65 on a shaft 66.

The racks 14 on the projections 2 at the ends of the slides 2 are preferably provided with straight-flanked and sharp teeth instead of the usual curved teeth, and 15 are setting wheels on a bar 17, one pinion being allotted to the rack 14 of each slide 2. The bar 17 is carried by a frame comprising two levers 20 at each end of the bar 17, and a pin 21 on end p the levers by which the frame is fulcrumed in the frame of the machine. Each setting wheel is provided with a downwardly projecting lug 18 on its boss 16 which is free to rotate on the bar 17, and its rim is recessed for the reception of a spring 19 which is secured to the rim of the setting wheel 15 at one end, 17, and to the bar 17 at the other end, 17 and tends to rotate the setting wheel anti-cloc wise.

One of the levers 2O constituting the setting wheel frame, for instance the lever at the right as viewed from the operator in Fig. 2,- is provided with a downward extension 22 which is acted on by a pull-back spring 23 tending to move the frame so as to throw the pinions 15 out of mesh with the racks 14. The rocking movement of the frame is controlled by a lever 24 on the pin 21 from which the extension 22 depends, and the end of the lever 24 engages a cam 25 on the shaft 5 which is designed to raise and lower the arm 24 once for each rotation of the shaft 5. Whenthe lever 24 is raised by the cam 25,

the setting wheels 15 mesh with their racks 14 on the slides 2 and when it is released by the cam 25 the spring 23 is free to throw the setting wheels 15 out of mesh with the racks 14 by rocking the setting wheel frame in downward direction. The rocking movement of the lever 24, and, consequently the setting wheel frame and the movement of the slides 2 are so timed that the lever 24 is oscillated by its cam 25 while the slides 2 are stationary. The raisin and lowering of the setting wheel frame t erefore efiects no rotation of the setting wheel 15 so long as the pinion frame is permitted to rock freely about its pins 21.

Means are provided for locking the setting wheel frame in its raised position for any length of time. Such means comprise a pawl 26 fulcrumed at 27 at the front end plate of the machine frame under the action of a spring 28 which tends to turn the pawl about its pivot in clockwise direction. The lower end of the pawl 26 coo erates with a cam 30 on a pin 29, the cam eing recessed at 31. A lever 32 is secured on the cam and a'rod 34 havin a handle 35 projecting from the rear Tate of the machine, and pivoted to the lever 32 at 33.

When the rod 34 has been pushed home as illustrated in Fig. 1, the pawl 26 is engaged by the solid portion of the cam 30 and held against rotation under the action of its spring 28. When, however, the handle 35 is pulled out until the recess 31 is opposite the end'of the pawl 26, as shown in dotted lines, the face of the recess 31 assumes a vertical position so that the pawl 26 is no longer restrained,

and the sprmg 28 is free to move it clockwise so that it engages below the end of the extension 22 and holds the setting wheel 'frame'in'the raised position which has been imparted to it by the cooperation of the lever 24 and the cam 25. The consequence is that the setting wheels 15 will now be rotated upon reciprocation of their slides 2 as they are in permanent mesh with the racks 14.: If the return movement of any of the slides under the action of its spring 3 is arrested due to the depression of the multiplicand key allotted to that slide, it will be understood that the setting wheel 15 of that slide performs only a part of the rotation performed by those pinions for which the return movement of the slides is not interfered with. in this manner, an item will be retained in the setting wheels 15 of those slides 2 for which multiplicand keys 1 have been depressed but this does not interfere with the operation of the calculating mechanism as any reciprocation of the slides the keys of which have been depressed starts from the initial position determined by the depres sion of the key.

Vfhen it is desired to introduce the item retained on the totalizer the corresponding setting wheel is arrested by means of its lug 18 with a reduced head. The slides 38 are sup= ported in the front end wall of the machine at one end and at the other in a recess 42 of a shaft 43. The shaft 43 is provided with a lever 44 to which a rod 45 with a handle 46 is linked. The position of the latch 37 which. is shown in Fig. 1 is its normal or initial position. In this position it is supported by its slide 38 which in turn is held in the recess 42 of the shaft 43. B pulling out the handle 46 the latch is raise against the action of its spring 39. r

The operation of the totalizer is as follows: Assuming the parts to be in the position illustrated in Fig. 1, the lug 18 of each set ting wheel 15 will engage the end of the latch 37 under the action of the spiral spring 19. When the setting wheels are raised by means of the lever 24, they will become disenga ed from the latch 37 as soon as they are in all mesh with the teeth 14 of their racks 2. The relation of the several parts is such that at the beginning of the mesh the lug has not yet become quite disengaged from the latch 37. hen, however, the setting wheels are locked in their meshing position by means of the pawl 26 and the handle 35 their lugs 18 will e beyond reach of the latches 37. Consequently the setting wheels are free to rotate with the reciprocationof the racks but when it is desired to transfer an item which has been retained by one of the setting wheels 15, to the corresponding rack 2 and the calculating mechanism or any other part of the machine, the handle 46 is pulled out causing the latch 37 to be raised through the medium of its slide 38 so that the shouldered upper end 37, Fig. 2, of the latch comes within reach of the lug 18. Therefore the corresponding rack 2 can be moved forward only until the lug 18 is arrested by the raised latch 37 and this displacement of the rack 2 is a function of the angle through which the setting wheel 15 had been previously rotated for retaining an item.

When it is desired to return the parts to their respective normal positions the handles 46 and 35 are pushed home so that the latch 37 is allowed tial position and the pawl 26 is Withdrawn from behind the extension 22.

If it is desired that certain latches 37 should not be raised upon rotation of the shaft 43, their slides 38 are pulled out at the front end plate of the machine so as to dis engage their inner ends from the recess of the shaft 43. This is important for certain cases, for instance if in decimal numbers having a plurality of ciphers at the rear of the decimal point only t 1e more important part of the decimal shall be retained.

As mentioned above, any number of totalizers may be provided and this is facilitated by the possibility of utilizing any part of the racks 2 for arranging and operating the additional totalizers. Obviously, for each totalizer a separate pair of handles 35 and 46 must be provided.

In the form of execution of the invention shown by way of example the setting members operative in the retaining of the numerical quantities are constituted by gear wheels 15, adapted for engagement with the rack bars 14 on the calculating members 2, but other means may also be employed as setting members.

With calculating machines of the kind in question the calculating members effect the calculation by the intermediary of suitable devices, such, for instance, as the settingwheels shown in the drawing; and the product is transferred to an adding-up or totalizing mechanism, for instance of the kind indicated at 12 in Figure 1. Hitherto calculating machines have been provided only with one such adding-up or totalizing mechanism. In contradistinction thereto the present invention provides a plurality of such mechanisms, for instance a plurality of adding-u or totalizing mechanisms 12 being arrange upon a suitably formed carrier which is capable of rotating upon an axle. in the example illustrated in Figure 1, six such mechanisms, of which always one is in operative connection with the adjusting wheels of the calculating mechanism. By rotating the carrier upon the axle, any one of the adding-up mechanisms may be brought to return to its normal or ini- There are,

into operative connection with the settingwheels so that a figure may be transferred to one or the other of the adding-mechanisms, if previously thereto the carrier has been turned appropriately.

The arranging of a plurality of adding-up 0r totalizing mechanisms is important especially in such cases where equal amounts are to be transferred to several accounts which now, with the aid of the arrangement in question, is easily rendered possible by appropriately turning the carrier. As a matter of course also in this case not only the nbrmal calculations of the calculating machine may be transferred to one or the other adding-up or totalizing mechanism by aid of the calculating member 2, but also the retained numerical value may be thus transferred, and this may be done repeatedly, if the same numerical value is to be transferred to several accounts.

I wish it to be understood that I do not desire to be limited to the exact details of construction and configuration, shown and described, for obvious modifications will occur to a person skilled in the art.

I claim 1. In a calculating machine having slides, a setting mechanism adapted to cooperate with each slide so as to be moved positively upon reciprocation of said slide, and means for placing said setting mechanism in operative relation with the slide to which it is allotted, the combination with said setting mechanisms of means for limiting their movement.

2. In a calculating machine having slides, each equipped. with a rack, a setting wheel adapted to mesh with each rack, so as to be moved upon reciprocation of said slide, and means for placing said setting wheel in mesh with the rack of the slide to which it is allotted, the combination with said setting wheels of means for limiting their rotation.

3. In a calculating machine having slides, each equipped with a rack, a setting wheel adapted to mesh with each rack, so as to be moved upon reciprocation of said slide, the combination with each rack and each setting wheel of means for throwing said setting wheel into mesh with said rack when said rack has completed its movement in a given direction, means for throwing said setting wheel out of mesh with said rack when said rack has completed its movement in opposite direction, and means for limiting the rotation of said setting wheels.

4. In a calculating machine having slides, each equipped with a rack, a setting wheel adapted to mesh with each rack, so as to be moved upon reciprocation of said slide, the combination with each rack and each setting wheel of means for throwing said setting wheel into mesh with said rack when said rack has completed its movement in a given direction, manually operated means for bolding said setting wheel in its meshing position with respect to said rack, means for throwing said pinion out of mesh with said rack when 5 said rack has completed its movement in o posite direction, and means for limiting the rotation of said setting wheels.

5. In a calculating machine having slides,

each equipped with a rack, a setting wheel 13 adapted to mesh with each rack, so as to be moved upon reciprocation of said slide, the

combination with each'rack and each setting wheel of means for throwing said setting wheel into mesh with said rack when said rack 15 has completed its movement in a given direction, means for throwing said setting wheel out of mesh with said rack when said ack has completed its movement in opposite direction, an abutment on each setting wheel,

29 a check adapted to cooperate with each abutment, and means for placing said check in operative position with respect to said abutment and for withdrawing it from such position. a

In testimony whereof, I afix my signature,

i ERNST Kama;

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