US703570A - Cash-register. - Google Patents

Description

Patented July 1, I902 A. GERDES.

CASH REGISTER.

(Application filed Oct. 22, 1901.)

(No Model.

me NORRIS FEYERs co, PHOTO-LITHO.. WASHINGTON, v.1:v

UNITED STATES PATENT OFFICE.

ADOLF GERDES, OF BERLIN, GERMANY.

CASH-REGISTER.

SPECIFICATION forming part of Letters Patent No. 703,570, dated July 1, 1902.

Application filed October 22,1901. Serial No. 79,578. (No model.)

To all whom it may omwcrn:

Be it known that I, ADOLF GERDEs, a subject of the Emperor of Germany, residing at 12 Wilhelmstrasse, Berlin, German Empire, have invented a new and useful Arrangement on Cash-Registers, of which the following is a specification.

The present invention relates to cash-registers which are actuated by the depressing of keys; and it consists of the novel construction of the addition-works in such a way that each pair of adjacent-lying counting-wheels receive an oppositely-directed force, so that said wheels rotate in opposite directions. By this means, therefore, the result is obtained that should two adjacent keys be simultaneously depressed only one of the adjacent countingwheels would be rotated-11 6., the tenswheelwhile the units-wheel wouldonly be rotated when its axle is turned to the zero position through the action of its back spring. Itis thus obvious that this arrangement eliminates all false addition of the counting-gear and makes the latter most certain.

In the accompanying drawings, in which similar letters of reference refer throughout to similar parts, Figure 1 illustrates a longitudinal section of the addition-works of a cash-register embodying the present invention. Fig. 2 shows, on an enlarged scale in front elevation, the counting (addition) gear. Fig. 3 pictures a key in a lower or depressed position in cross-section on line A B of Fig. 1. Fig. 4 is a plan view of the device shown in Fig. 2.

In the construction of the inventiona shaft 1 is employed, and which is mounted in suitable bearings in a box or casing. mounted on this shaft are two arms 8 and 4:, which lie adjacent to the inner walls of said casing. A cross-rod 5 is mounted between these two arms and parallel to said shaft and rotatable with the latter. The are described by said rod is limited on the one hand by the floor 6 of said casing and on the other by stops 5 5, fastened to said walls. As is obvious, one of these shaftsis arranged for each row of keys, the latter being mounted in a line above and parallel to said shaft. Each key comprises a plunger 8, sliding up and down in suitable guide holes formed in the top 9 of said casing and said floor 6. Mounted ed-on the tens-shaft 20. Rigidly on each plunger is an arm 10, provided with a rod 11, which latter, sliding up and down also through said floor, acts as a guide and serves to stiffen arm 10. From Fig. 3 this construction will be clearly understood. As the key is pressed downwardly arm 10 strikes said cross-rod 5, driving the latter in an are down and about said shaft, and as rod 5 is fast by means of arms and to said shaft the latter is thus rotated a predetermined distance. A collar 1 on said plunger limits the upward movement of the latter, which occurs when pressure is removed from the key and by means of a spiral spring 12 coiled about said plunger and pressing at one end on said floor and with the other against said collar. A spring 7 serves to return said shaft and cross-rod to their position. As will be seen from Fig. 1, the arms 10 are graduated in their positions on the said plunger, so as to give a differential movement to bar 5 when depressed. The opposite motion of the adjacent counting-wheelsfor example, the unitswheel 2 and the tens-wheel1is obtained in the following manner: The units-Wheel 2 is loosely mounted on shaft 1 and carries a spring-actuated pawl 16, (see Fig. 2,) engaging a ratchet 15, rigidly mounted on shaft 1. As said shaft is rotated by said shaft pawl 16 rides over said ratchet; but as the latter is reversed by spring 7 it catches the pawl, and thus rotates the units-wheel, while the tens-wheel, mounted on a hollow axle 17, is already rotated during the down motion of the key-plunger by means of a pawl 18, carried by its ratchet 19, which is rigidly mount- (See Fig. 2.)

The motion of the units-wheel is transferred to the tens-wheel'in the manner that by pressing down one of the keys in the units-row the ratchet 15 is turned, and by the upward spring of the key the said ratchet engages the pawl 16, thereby turning the units-wheel. For every ten teeth of the units-wheel one tooth of the ratchet 21, mounted therewith and shown in dotted lines, Fig. 2, engages a pawl 23, which as the last of the ten teeth passes under the action of spring 22 engages the tens-wheel by means of a spring-actuated pawl 24, thus moving the said tens-wheel one number forward, as may be'seen from Fig. 1. The tens-wheel and hundreds-wheel are similarly connected,&c. lhe pawl 25,m0unted on shaft 1 and having aspring 26, engages the tens-Wheel 14L for preventing back turnmg.

5 Having now described my invention, what I claim as new, and desire to protect by Letters Patent, is-

In a cash-register the combination of a shaft,

a cross-rod parallel thereto and connected [0 therewith and adapted to partially rotate thereabout,key-plnngers, arms on said plungers adapted to engage said rod and rotate said shaft by pressing down said key-plungers, a spring on each of said plungers, a

\ i5 ratchet rigidly mounted on said shaft, a units-

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