US2197291A - Totalizer for calculating machines - Google Patents

Description

April 16, 1940. v I 3 BER 2,197,291

TOTALIZER FOR CALCULATING MACHINES AND CASH REGISTERS WIT! CARRYING MECHANISM F11. Feb. 25, 1938 2 Sheets-Sheet 1 Fig.2

3. Beria Emm /or April 16, 1940.

B. BERI'A TOTALIZER FOR CALCULATING MACHINES=AND CASH REGISTERS WITH CARRYING MECHANISI Filed Feb. 25,- 1938 2 Shets-Sheet 2 Patented Apr. 16, 1940 PATENT OFFICE TOTALIZER FOR CALCULATING MACHINES AND CASH REGISTERS WITH CARRYING MECHANISM Biagio Beria, Turin, Italy, assignor to Societa Anonima Officine Di Villar Perosa, Turin,

Italy Application February 25, 1938, Serial No. 192,635

. In Italy March 4, 1937 4 Claims.

It is an object of this invention to provide an improved construction of totalizers for calculating machines and cash registers of the type in which each numeral wheel is provided with a front cam which, as the Wheel passes from the position 9 to the position 0, strikes a cam on the carrying sleeve, bringing the latter to its operative position. It is a further object of this invention to provide a totalizer of compact construction wherein the numeral wheel shaft and the carrying sleeve shaft are arranged very close to each other. With these and incidental objects in view, the invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in the appended claims. Among these features is the arrangement of the above mentioned cam,

which is struck by the front cam on the numeral wheel on the front portion of a collar fitted on the carrying sleeve, and connected therewith for longitudinal but not for angular displacements. While the collar is prevented from rotating, the sleeve may rotate With respect to the collar.

This construction has the advantage that springs may be fully dispensed with in the mechanism for displacing and restoring the carrying sleeves and no member of the carrying mechanism need be arranged on the shaft of the numeral wheels, more particularly in the spaces between the wheels. This is more particularly advantageous in totalizers in which the numeral wheels are operated for zeroising, for instance for taking a grand total, by a pick-up mechanism arranged on their shaft, as described in applicants copending application Ser. No. 71,522 filed March 28, 1936. In fact, as the space between the numeral wheels is free from any member belonging to the carrying mechanism, the teeth for driving the numeral wheels may be arranged atthe outside of said wheels.

A further feature according to this invention consists in the fact that the numeral wheels are maintained in their positions on the shaft by means of bars carried by a stationary member of the totalizer, which are engaged in circumferential grooves in the numeral wheels preventing their longitudinal displacement, so that provision of blocking means on the numeral wheel shaft becomes unnecessary and fitting and replacement of the numeral wheels is greatly facilitated. All the bars may be obtained from one piece, for instance of sheet metal, from which may also be formed the stops for preventing rotation of the above mentioned collar as well as those for restoring the carrying sleeves to their inoperative position.

Further features according to this invention will be understood from the accompanying drawings which show, by way of example a preferred form of the new totalizer.

Figure 1 is a longitudinal section, Figures 2 and 3 are cross sections on lines 11-11 and III--III, respectively, of Figure 1.

Fig. 4 is a plan view of the above mentioned sheet metal piece forming bars and stops.

Fig. 5 is a section on line VV of Fig. 4.

Fig. 6 is a side elevation of a carrying sleeve with the coilar fitted thereon. I

Fig. 7 is a side elevation of a uni-directional clutch in the driving mechanism for the shaft of the carrying sleeves.

The shafts 2 and 3 are arranged parallel to each other in a half-open casing l of the totalizer. The numeral wheels 4 are loosely mounted on the shaft l and the carrying sleeves 5 are arranged on the shaft 3. Each numeral wheel (Figure 2) has a set 6 of ten teeth by means of which the numeral wheel is advanced by the differential mechanism (not shown) of the calculating machine or cash register and, in case of a transfer or carrying operation, by a tooth 3| of the carrying or transfer sleeves 5.

In Fig. 1, for clearness sake, all the teeth 3| on the sleeves 5 are illustrated as in alignment with one another. Practically, however, the teeth are in staggered relationship and disposed on a spiral line, as indicated in dash lines in Fig. 2.

All the numeral Wheels 4 but the one for the highest decimal order are further formed with a flange do on the front portion of which a tooth 8 is arranged.

A comb-shaped key I is arranged in a longitudinal groove in the shaft 2 and may be longitudinally displaced to bring the branches la within the path of the teeth 8 in order to pick up the numeral wheels 4 for restoring them to zero as described in a more detailed manner in applicants co-pending application Ser. No. 71,522 filed March 28, 1936. Displacement of the key I is obtained by the longitudinal movement of the member 9, loosely mounted on the shaft 2 and formed with an inner groove receiving the last tooth lb of the key 1. The shaft 2 is operated by the driving mechanism of the calculating machine or cash register, which imparts a rotation to the toothed wheel l0 arranged with the toothed wheel II on the sleeve l2, loosely fitted on the pivot 43. As is described in applicant's co-pending application Ser. No. 71,522 flied March 28, I

1936, the totalizer l is journaled by the ends of the pivot l3 to the frame of the calculating machine or cash register.

Rotation of the wheel II is transmitted to the toothed wheel I l keyed by means of the pin [5 on the shaft 2.

The numeral wheels 6 are spaced apart by means of a sheet metal member l6 secured by the screws IT to the pivot l3. In the zones occupied by the numeral wheels 4 the spacing member I6 is formed with openings l to separated by strips [6b. These strips 82) are engaged, as is shown in a more detailed manner by Figures 2 and 3 in the grooves formed in all the numeral wheels 4, with the exception of the one for the highest order, between the flange do and teeth (3, thereby preventing any lateral displacement of the numeral wheels. The flanges 4a and teeth 6 are allowed to pass through the openings lfia. The width of the opening lea situated in front of the numeral wheel *3 for the highest order is narrowly limited to the depth of its teeth 6, so that any lateral displacement of this numeral wheel is prevented.

The carrying or transfer sleeves are displaceably keyed on the shaft For this purpose, the shaft is formed with a longitudinal slit receiving a comb-shaped key 55, of which the teeth Mia enter longitudinal grooves it in the sleeves 5. To the shaft 3 and, consequently, all the sleeves 5 is imparted a rotation derived the toothed wheel 2E! fixedly connecteo to the toothed wheel 14 on the shaft 2 and meshing with the toothed wheel 23 on the shaft 3. The wheel 2i is the driving member of a uni-directional tooth coupling 22, of which the driven member 23 is lreyed on the shaft 3 by means of the last tooth 81; of the key [3. A spring pushes the member 23 with its teeth against the member 2 Each carrying sleeve is provided with a collar 25 rotatable with respect to the sleeve, with which it is solidly connected a longitudinal direction by an abutment on the sleeve, at one side, and a ring at the other side. The collar 25 is provided with two abutments and 25 (Fig. 2) the abutment 2'6 rests on an extension like on the said sheet metal member while the abutment 28 rests in an opposite direction on another portion of the spacing member l6, so that any angular displacement of the collar 25 is prevented. Each of these collars is provided with an inclined front cam situated in the path of an inclined front cam 39 on the numeral wheel 4 of the next lower order (Fig. 3) so that when this numeral wheel goes over from the position 9 to the position the cams and 3t abut each other and produce a lateral displacement of the collar 25 and, consequently, of its respective sleeve 5. The height of cams 28 and 313 is so chosen that after such operation, the teeth on the displaced sleeves are in front of the set of teeth 6 on the numeral wheel of the next higher order. During following rotation of the shaft 3, the teeth 3i on the sleeves enter successively in the space between two successive teeth 6 on the numeral wheels 4. For this reason, the teeth ill on the previously displaced sleeves 5 advance by one figure the numeral wheels of the next higher order.

Each sleeve 5 is provided with an inclined cam 32 which, after the tooth has advanced the numeral wheel 4 of the next higher order, strikes the stop formed by a lug 15d on the said extension I on the spacin member 16. Each sleeve 5 is thereby returned, together with the collar 25 to the position in which the tooth Si is no longer in alignment with the set of teeth 6 on the drum 4 and the cam 29 is again in the path of the cam 30.

It will be understood that the invention is not limited to the details herein described and illustrated by way of example, but may be largely varied without departing from the scope of this invention.

What I claim is:

l. A totalizer for calculating machines and cash registers comprising, in combination, two parallel shafts operatively connected together, a series of numeral wheels loosely mounted on one of said shafts and carrying ten teeth for their forward feed, a corresponding series of carrying sleeves slidably mounted on the other shaft, spline means for preventing rotation of said sleeves with respect to said shaft, a tooth on each carrying sleeve adapted to engage with the teeth on its respective numeral wheel, the tooth on said carrying sleeve being normally out of the path of the teeth on the corresponding numeral wheel, a collar loosely mounted on each sleeve, means for preventing axial displacement of said collar on its sleeve, stationary means for preventing rotation of said collars but not their axial displacement together with their carrying sleeves, a cam on each numeral wheel, and a cam on each of said collars, each arranged in the path of the first-mentioned cam of the numeral wheel 01' next lower order, so as to produce under the action of said cam of the numeral wheel an axial dis- Placement of the collar and sleeve sufficient for bringing its tooth into engagement with the teeth on the numeral wheel of the next higher order, thereby displacing said wheel by one numeral.

2. A totalizer for calculating machines and cash registers comprising, in combination, two parallel shafts operatively connected together, a series of numeral wheels loosely mounted on one of said shafts and carrying ten teeth for their forward feed, a corresponding series of carrying sleeves slidably mounted on the other shaft, spline means for preventing rotation of said carrying sleeves with respect to said last mentioned shaft, i

a tooth on each carrying sleeve adapted to engage with the teeth on the corresponding numeral wheel, the tooth on said carrying sleeve being normally out of the path of the teeth of the corresponding numeral wheel, a collar loosely mounted on each sleeve, means for preventing axial displacement of each of said collars on its sleeve, stationary means for preventing rotation of said collars, but not axial displacement thereof with their sleeves, a cam on each numeral wheel, a cam on each of said collars, each arranged in the path of the first mentioned cam of the numeral wheel of next lower order, so as to produce under the action of said cam of the lower order wheel an axial displacement of the collar and sleeve for bringing its tooth into engagement with the teeth on the numeral wheel of the next higher order, thereby displacing said numeral wheel by one numeral, a further cam on each of said sleeves and a fixed stop adapted to abut said second mentioned cam on the sleeve on said axial displacement of the sleeve for restoring said collar and sleeve to their normal position by effect of the rotation of said sleeve carrying shaft.

3. A totalizer for calculating apparatus and cash registering apparatus, comprising a casing, two parallel shafts mounted in said casing and operatively connected together, a series of numeral wheels loosely mounted on one of said shafts and having teeth by means of which said numeral wheels receive a step by step movement from the apparatus with which said totalizer is associated, a plate secured to said casing and having means for holding said numeral wheels in position on their shaft, a cam-shaped flange on each of said numeral wheels except the wheel of the highest order, said flange projecting through the holding means of said plate, a series of carrying sleeves on the other shaft, one for each numeral wheel, a tooth on each carrying sleeve adapted to engage with the teeth on the corresponding numeral wheel, the tooth on said sleeve being normally out of the path of the teeth on said wheel, a collar loosely mounted on each sleeve, means for preventing axial displacement of said collar on its sleeve, means in said plate for preventing rotation of said collars but not their axial displacement together with their sleeves, a cam on each numeral wheel, a cam on each of said collars, each arranged in the path of the first mentioned cam of the numeral wheel of next lower order, so as to produce under the action of said cam of the lower order wheel an axial displacement of the collar and sleeve for bringing its tooth into engagement with the teeth on the corresponding numeral wheel, thereby displacing said numeral wheel by one numeral, a further cam on each of said sleeves and fixed stops adapted to successively abut said second mentioned cams on the sleeves for restoring said for preventing axial displacements of said wheels on their shaft, a series of carrying sleeves, one for each numeral wheel, slidably mounted on the other shaft, each of said carrying sleeves having a tooth for advancing the corresponding numeral wheel, said tooth being normally out of the path of the teeth on said numeral wheel, cam means on each carrying sleeve and on the numeral wheel of the next lower order, said means co-omrating together on each full turn of said numeral wheel I of the lower order for axially shifting said sleeve on its shaft and bringing its tooth within range of the teeth on the corresponding numeral wheel for advancing the latter by one tooth, when the adjacent numeral wheel of the lower order has performed one turn, and means on each of said sleeves and said plate for returning each of the sleeves to its initial position out of the path of the teeth on the corresponding numeral wheel.

' BIAGIO BERIA.

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