Patent GB-595748-A (GB)
Title: Improvements in or relating to counting apparatus and particularly to apparatus for counting bank-notes
IPC: G06M7/06
Filed: 1945-01-23
Abstract: 595,748. Counting-apparatus. KATZ, L. NAMENYI-, and FURZEHILL LABORATORIES, Ltd. Jan. 23, 1945, No. 21564/43. [Class 106 (i)] In an apparatus for counting electrical impulses of different strengths representing different numerical values in which a driven rotary member drives a counter, the rotary member is controlled by a plurality of equally spaced electrically-,operated stop devices controlled by a plurality of circuit closing devices which are subjected simultaneously to each impulse and which are adapted to respond to different minimum impulse strengths corresponding to the number to be added, the stop devices being connected to the circuit closing devices through a rotary distributing switch driven synchronously with the rotary member and arranged so that every operation of one or more of said circuit closing devices causes the movement of the same number of stop devices out of arresting position, so as to allow the rotary member to advance through an angular movement proportional to the number to be added. The stop devices may be provided with holding means to prevent premature return after cessation of the impulse. The shaft 23, Fig. 1, which is driven through a magnetic clutch 44, carries slip rings 34-36, one associated with each relay 10-12, connected to contact studs on the commutator 43 which coact with contact members 45-48. These parts are shown in section in Fig. 1 and are repeated in elevation in Fig. 2 showing electrical connections. The shaft 23 also has a projecting finger 22 arranged to be arrested by any one of four electromagnet armatures 61-64, Fig. 2. The relays 10-12 are designed to operate at different impulse strengths from the lines 13, 14. On receipt of a weak impulse signal, only relay 10 closes and completes a circuit comprising slip ring 34, contact member 45, electromagnet 53, battery 59, armature 61, finger 22 and shaft 23, whereby the armature 61 is withdrawn from the finger 22 permitting the shaft to rotate 90 degrees until the finger 22 is stopped by the armature 62 ; this rotation registers one unit on the counter 67. If a slightly stronger impulse is received from lines 13, 14, relays 10 and 11 both close and armatures 61 and 62 are withdrawn from the path of the finger 22 permitting the shaft 23 to rotate 180 degrees and register two units on the counter. Similarly, a stronger impulse would close all three relays 10-12 and permit a 270 degrees rotation of the shaft 23 to register three units on the counter. In case the duration of the impulses is too short to enable the finger 22 to clear one of the armatures before its associated electromagnet is deenergized, each electromagnet has a holding coil 68-71 which is energized via a commutator disc 79, which has an insulating segment 80 and which is insulated from the shaft 23, and via the appropriate finger 75-78 and brush 8 to the negative side of the battery 59. The insulated segment 80 is so disposed angularly that on receipt of a momentary impulse on the lines 13, 14 sufficient to close one or more of the relays 10-12 to energize one or more of the electromagnets momentarily, the appropriate holding coil is also energized via the commutator disc 79 and maintained energized until the finger 22 has passed the appropriate number of electromagnets. Specification 595,764 is referred to.