US2363114A - Setting device for registers - Google Patents

Description

E. F. BRITTEN, JR 2,363,114

SETTING DEVICE FOR REGISTERS Filed June 4, 1943 A TTORNE Y Patented N... 21, 1944 SETTING DEVICE FOR REGISTERS Edwin F. Britten, Jr., Short Hills, N. 1., assignor to Monroe Calculating Machine Company, Orange, N. J., a corporation of Delaware Application June 4, 1943, Serial No. 489,689

2 Claims.

The invention relates to setting devices for registers, having for an object the provision of an improved device, the advantages of which will be obvious, for manually setting values in visible register wheels.

The invention consists in the novel construction and combinations of parts as hereinafter set forth in the claims;

In the accompanying drawing,

Figure 1 is a rear elevation of the invention, with parts broken away.

Figure 2 is a section on the line 2-2, Figure 1.

Figure 3 is a diagrammatic view showing three positions taken by the oblique pawl lever arm relative to the teeth of the lower wheel during its operation, said teeth being shown in section and 13.118 oblique pawl lever arm bein shown in rear In the drawing, the numeral i designates two meshing spur gear wheels, having in the present instance each ten teeth, and the upper wheel having a lateral extension I bearing digital numerals one for each tooth. A spring urged detent 2 engages the lower gear wheel.

A pawl lever 3, fulcrumed at 4 to the stationary framing l, is normally located out of the path of movement of the teeth of lower gear wheel and has the tail arm thereof, engaged by a depressible key I. This tail arm of the pawl lever is engaged within a lateral notch 8 of the shank of said key, a retracting spring 9 serving to restore the key, and also the pawl lever, to normal posiiion following manipulation and release of the The pawl lever 3 is provided with an oblique arm III the lateral elements of the forward edge face of 'which are located in the planes of the opposite sides of the lower gear wheel I and radially with respect to the longitudinal axis of the fulcrum pin 4, and upon depression of the manipulable key I, said oblique arm III of the pawl lever will engage between two adjacent teeth of the lower spur gear wheel and the forward edge face of said oblique arm will in the resulting forward stroke thereof engage the curved face I l of an adjacent tooth of the lower wheel I to advance said wheel, and consequently the upper register or numeral wheel I, one tenth around to expose to view the next numeral of the wheel. The profiles of the teeth of the gears i are somewhat modified in order to give best results.

The fulcrum pin 4 of the pawl lever is mounted at one end thereof in the stationary framing .i

with a lateral cam face I3 adapted to bear against the next succeeding tooth of the lower of the spur gear wheels I to thereby displace the pawl lever laterally against the tension of said spring I2 to pass said next succeeding tooth of said wheel during the return stroke of the pawl lever from the dotted line position of Figure 2 to the full line position of said figure.

In practice the pawl lever is made of sheet metal and the main arm thereof is bent upon the line It, thereby providing said lateral cam face I3.

I claim:

1. In a setting device for registers, a spur gear, a spring-urged pawl lever having an oblique arm provided with a lateral cam face and a forward edge face, a spring-retracted manipulable key engaging another arm cf said pawl lever to maintain the latter normally without the path of movement of the teeth of said spur gear and to retract said pawl lever following manipulation and release thereof, said pawl lever being operable to engage said oblique arm between two adjacent teeth of said spur gear and to engage said forward edge face with an adjacent tooth of said spur gear to advance the latter the distance between two adjacent teeth thereof upon each forward pawl lever stroke, said lateral cam face upon the return stroke of said pawl lever bearing against the next succeeding tooth of said spur gear to displace said pawl lever laterally against the tension of its spring to pass said next succeeding tooth.

2. In a setting device for registers, a spur gear, a fulcrum pin one end of which is mounted in the stationary framing and the other end of which has a head, a pawl lever having an aperture loosely engaged by said fulcrum pin, a coiled spring surrounding said pin and bearing at one end against said framing and at the other end against said pawl lever to urge the latter against said head, said pawl lever having an oblique arm provided with a lateral cam face and a forward edge face, a spring-retracted manipulable key engaging another arm of said pawl lever to maintain the latter normally without the path of movement of the teeth of said spur gear and to retract said pawl lever following manipulation and release thereof, said pawl lever being operable to engage said oblique arm thereof between two adjacent teeth of said spur gear and to engage said forward edge face with an adjacent tooth of said spur gear to advance the latter the distance between two adjacent teeth thereof during each forward pawl lever stroke, said lateral cam face upon the return stroke of said pawl lever bearing against the next succeeding tooth of said spur gear to displace said pawl lever laterally against the tension of its spring to pass

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