device for the electrical output of information in a bueromaschine zifferninformation advantage of a cash register

摘要

1,205,339. Selective signalling. SVENSKA DATAREGISTER A.B. 23 May, 1968 [4 July, 1967], No.24682/68. Heading G4H. To digitize the positions of a plurality of toothed wheels 4a, 4b . . . , Fig. 5, in a machine, for example a cash register, a wavy groove 41a, Fig. 5, is engraved between each pair of teeth on each wheel such that when it is traversed by a feeler 15, Fig. 4, a shutter 14 is reciprocated between a light source 20, Fig. 3, and a photocell 17 so as to produce a series of binary coded pulses representing the positions of the wheels. The feeler 15 is carried by a saddle 11, 12, Fig. 5, which is moved 34, 38 parallel to the axis of the wheels, and as the saddle moves a pinion 26, Figs. 5 and 3, on it engages with a fixed rack and rotates an apertured 24, 25 cylinder 23, Fig. 3, so that the photo-cell 17 is only responsive to the position of the shutter 14 at the appropriate bit-position sampling positions along the engraved grooves, and so that a second photo-cell 18 produces a series of clock-pulses by which the data pulses can be interpreted.