US1797273A

US1797273A - Totalizer

Info

Publication number: US1797273A
Application number: US299598A
Authority: US
Inventors: Floyd E Miner
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-08-14
Filing date: 1928-08-14
Publication date: 1931-03-24
Anticipated expiration: 1948-03-24

Description

M r h 4, 3 E. MINER T'OTALIZER Filed Aug. 14, 1928 Patented Mar. 24, 1931 PATENT OFFICE FLOYD E. MINER, OF CHICAGO, ILLINOIS TOTALIZER Application filed August 14, 1928. Serial No. 299,598.

My invention relates to totalizersand more particularly to totalizers applicable to calculating machines, speedometers and the like, and has for its object the provision of an improved totalizer which is simple, positive,

inexpensive, and of minimum parts.

The main difliculty with devices of this type has heretofore been in the number of parts required to obtain true alignment of the numeral wheels. Usually the wheels of higher order lost their alignment inasmuch as no positive look was provided which held the wheels at their advanced positions over a long period of operation. This was particularly true with totalizers of such instruments as speedometers, where mileage is accumulated slowly and the wheels of higher order are gradually advanced without occasional resetting or adjustment to bring the Wheels back into true alignment.

An object of my invention resides, therefore, in the provision of simple means for positively locking the numeral wheels against rotation until the wheels of lower order have made a complete rotation. This is accomplished by the simple arrangement of a driving gear on each wheel of lower or der, an advancing gear on each wheel of higher order, and a third gear non-rotatably mounted between adjacent wheels whereby each driving gear rotatably revolves about the advancing gear of the wheel of next higher order and about the adjacent third gear. As the wheel of lower order makes a complete rotation, its driving gear is locked against rotation to rotate the advancing gear for advancing the wheel of next higher order.

Other objects of my invention will appear 0 in connection with the description hereinbelow and in the drawing which accompanies the same, in which drawing:

Figure 1 is a side elevational view partly in section of a totalizer mechanism embodying my invention;

Fig. 2 is a detailed sectional view taken on line 2-2 of Figure 1;

Fig. 3 is a detailed view of the driving gear; and

Fig. 4 is a perspective view of a third gear illustrating the positive lock provided to cooperate with the driving gear.

Referring more particularly to the drawings, 10 indicates a frame provided with

vertical sides

11 and 12, in which is fixed a totalizer shaft 13. Loosely mounted upon this totalizer shaft are a plurality of units, one unit for each denominational or decimal order. Each unit comprises a numeral wheel 14, a driving gear 15, an advancing gear 16, and a fixed or third gear 17. These elements, to-wit, the numeral wheel 14, driving gear 15, and advancing gear 16, are secured together and loosely mounted upon shaft 13, while third gear 17 is stationarily mounted or fixed to shaft 13 to prevent its rotation. Any suitable means may be provided to lock third gear 17 to shaft 13. I have shown, however, the usual form of key 18 formed on gear 17, which key 18 of each gear of the different units cooperates with a keyway 19 in shaft 13. These units are placed adjacent to each other on shaft 13 with the third gear 17 interposed between adjacent numeral wheels 14. Driving gear 15 is suitably carried on pin 20 fixed to the numeral wheel 14 to permit the driving wheel to rotate thereon and to revolve with the rotation of numeral wheel 14. Each driving gear 15 is arranged to mesh with advancing gear 16 of the unit of next higher order.

As illustrated in Figure l, advancing gear 16' of the next higher order is in mesh with driving gear 15 of the lower order. The third gear 17 is also in mesh with this driv mg gear 15. Numeral wheel 14 of the lowermost order is preferably driven by any suitable means through its advancing gear 16. Such driving means depends, of course, upon the adaptation or application of the totalizer. In the case of a speedometer, the usual driver is attached so as properly to drive advancing gear 16, which, as shown, may be made integral or otherwise suitably fixed to numeral wheel 14. A hub 21 is provided on numeral wheel 14 on the side opposite to that of the advancing gear 16. Hub 21 abuts against third gear 17 and provides for the reception of an offset camlike member 22 on third gear 17. Cam 22 is formed during the cutting of we the teeth on this gear. A portion of the periphery of this gear is left blank and then during the stamping operation is oifset slightly, as shown in Fig. 4. It is then upturned so as to provide a cam surface 23. As the driving gear 15 revolves by the rotation of numeral wheel let, it is in mesh with and revolves about the advancing gear 16. of the numeral wheel of next higher order and also with gear 17. As the numeralwheel 1d of lower order makes a complete rotation,"driving gear 15 engages cam surface 23, whereby it will be locked against its rotation on pin 20 and will be caused to slide over the surface 23. This will rotate advancing gear 16 the length of this cam surface, which is equival nt to the distance of two teeth, or one tenth of the rotative movement of the advancing gear. It will be observed, therefore, that as numeral wheel 14 makes a complete rotation, its driving gear 15 is temporarily locked against rotation, so that continued revolving of this driving gear by the numeral Wheel for the distance of two teeth will rotate the advancing gear 16 of the Wheel of next higher order.

,In order to accomplish this action of the driving gear, namely, the locking thereof against rotation, I propose to out a portion of one of the teeth 24 to provide space 25. Driving gear 15 at this space 25 contacts with cam surface and readily slides thereover as the numeral wheel 14 rotates. The driv ng gear is'allowed to revolve without rotating,

which causes the loosely mounted numeral wheel of the next higher order to rotate by reason of the fact that its advancing gear will.

be rotated by the driving gear.

The driving gear 15 remains in mesh. during its complete rotation about its axis by its numeral wheel 14, with the advancing gear of the next higher order. It is permitted to rotate as long as it remains in mesh with the teeth of the third gear 17 stationarily mounted or fixed to shaft 18. As soon as the gear at surface 25, formed by cutting away a portion of one of the teeth 24, contacts with cam surface 28, this driving gear slides over the cam surface inasmuch as it is locked against rotation by the engagement of adjacent teeth '26 and 27 against this surface. These

teeth

26 and 27 positively hold driving gear 15 against such rotation, and in view of the latter not being in mesh with third gear 17 at this moment the driving gear is permitted to continue moving without rotating thereby rotating or advancing the advancing gear 16 of the wheel of next higher order.

During the periodthe driving gear 15 is revolving by the rotation of numeral wheel I 14, it is rotating and revolving, at the same time, in meshed relation with the advancinggear 16. It is therefore obvious that the numeral wheel of the next higher order carryingthis advancinggear '16 is-positively locked thereby against any rotation. It is obviously impossible for this numeral wheel of the next higher order accidentally to rotate and thereby become disali ned with the other numeral wheels.

I have provided an extremely simple form of totalizer maintaining true alignment of the numeral wheels during operation. The parts provided are few and simple, inexpensive, andpositive in action.

It will be obvioustothose skilled in the art that various changes and modifications may be made without departing from the spirit and scope of my invention, and consequently I do notintend to be limited to the details shown or to the specific embodiment of the invention.

I claim:

.1. The combination numeral wheels, of a drive gear attached to a wheel of low numerical order, an advancing gear attached to the wheel of next higher order, said drive gear being in constant mesh with the-advancing gear of the wheel of next higher order, a third gear stationarily mounted to cause'said drive gear to rotatably revolve about its advancing. gear, and means to temporarily lock said drive gear against rotationwhereby to rotate the advancing gear and etlect a carrying of the wheel of next higher order.

2. The combination with a plurality of numeral wheels, of means for positively lock-' ing said wheel's against rotation until the wheels of lower ord-erhave made a substantially complete rotation comprising a driving gear on a Wheel of low numerical order, an advancing gear fixed-to rotate with the Wheel of next highest order, athird gear non-rotatably mounted between adjacent wheels, said driving gear" rotatably revolving about the advancing gear fixed to the wheel of next higher order and about said adjacent thirdgear, and means associated with the third gear to temporarily lock the drive gear against rotation after the wheel operating the drive gear has made a substantially complete rotation whereby to rotate the advancing gear and to advance the wheel of next I higher order.

3. The combination with a plurality of numeral wheels, of means for positively looking said wheels against rotation until the wheels of lower order have made a substantially complete rotation, comprising a driving gear on a wheel, of low numerical order,

an advancing gear on the wheel of next highor order, a third gearstationarily mounted between the ad acent wheels, said driving gear rotatably revolving about the advancing gear of the wheel of next higher order and about the adjacent third gear, and a cam on the third gear to lock the driving gear against radial rotation whereby continued revolving of the driving gear rotates the advancing gear to advance the wheel of next higher order.

4. The combination with a plurality of numeral wheels, of a driving gear on a wheel of low numerical order, an advancing gear on the wheel of next higher order, athird gear non-rotatably mounted between adjacent wheels to cause the cooperating drive gear to rotatably revolve thereabout and about the advancing gear of the next higher order, and an cit-set cam in the path of the driving gear for temporarily locking the latter against rotation after the wheel of lower order has made a substantially complete rotation whereby to rotate the advancing gear for advancing the wheel of next higher order.

5. The combination with a plurality of numeral wheels, of a drive gear attached to a wheel of low numerical order, an advancing gear attached to the wheel of next higher order, said drive gear being in constant mesh with the advancing gear of the wheel of next higher order, a third gear stationarily mounted between said wheels to cause said drive gear to rotatably revolve about its advancing gear, and means to temporarily lock said drive gear against rotation during a definite portion of the complete rotation 01": the

wheel of low order whereby to rotate the advancing gear and effect a carrying of the wheel of next higher order.

6. The combination with a plurality of numeral wheels,ot a driving gear on a wheel of v low numerical order, an advancing gear on the wheel of next higher order, a third gear having an oil-set cam portion in the path of the driving gear, and non-rotatably mounted between adjacent wheels, the said drive gear being adapted rotatably to revolve about the advancing gear and the stationary third gear whereby the wheel of next higher order is locked except for the time the drive gear is in engagement with the offset cam.

7. The combination with a plurality of numeral wheels, of a drive gear on a wheel of low numerical order, an advancing gear on the wheel of next higher order, a third gear having an oil-set cam portion in the path of the drive gear and non-rotatably mounted between adjacent wheels and being the same size as the said advancing wheel, the said drive gear being adapted rotatably to revolve about the advancing gear and the stationary gear and having a portion of one of its teeth cut away so as to engage with the said cam surface whereby to lock said drive gear against rotation and eflect a carrying of the wheel of next higher order.

8. The combination with a plurality of numeral wheels, of a drive gear rotatably at tached to a wheel of low numerical order at a distance from the center of said wheel, an advancing gear fixedly attached to the'wheel of next higher order, a third gear having scribed my name.

FLOYD E. MINER.