Counting-down counter

Details Counting-down counter Counting-down counter

1979-06-18

1981-05-19

Hix, L. T.

Registers

Locking mechanism

Typewriter computing

235132R, G06F 1518, G06C 2500

Patent

active

042687438

ABSTRACT:
At least one presetting digit wheel consists of a rotatably mounted digit-carrying wheel part, a rotatably mounted resetting wheel part, and a non-positive two-way coupling means connecting the digit-carrying wheel part and the resetting wheel part for joint rotation. A rotatably mounted resetting shaft is provided. Lost-motion one-way coupling means are adapted to connect the rotatably mounted resetting shaft and the resetting wheel part for joint rotation only in one sense and only when the resetting shaft and said resetting wheel part are in a predetermined rotational position relative to each other. Detent means are adapted to hold the resetting shaft against rotation in a predetermined rotational position thereof, and locking key means are manually operable to hold the digit-carrying wheel against rotation when the resetting wheel part is rotated by said resetting shaft.

REFERENCES:
patent: 2808208 (1957-10-01), Wales
patent: 2966301 (1960-12-01), Fowlie
patent: 3447744 (1969-06-01), Irion et al.

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