Digital clock gearing

Details Digital clock gearing Digital clock gearing

1976-07-02

1978-07-04

Jackmon, Edith S.

Registers

Coded record sensors

Particular sensor structure

58 7, 58 23D, 74409, 235 1C, G04B 1300, G04C 300, G04B 1902, F16H 5518

Patent

active

040980723

ABSTRACT:
A digital clock having backlash-free gearing between a step motor and digit wheels that indicate time. The gearing includes an input pinion connected to the step motor, intermediate gearing driven by the pinion and an output ring gear driven by the intermediate gearing and connected to drive a seconds digit wheel of the clock mechanism. A pivotal bracket rotatably carries the intermediate gearing and is biased in one direction by a spring so that the intermediate gearing is urged into backlash-free engagement with both the input pinion and the output ring gear. The bracket tilts as well as pivots to permit the intermediate gearing to properly mesh with both the input pinion and the output ring gear.

REFERENCES:
patent: 2513217 (1950-06-01), Tomlines
patent: 3574995 (1971-04-01), Turner
patent: 3918252 (1975-11-01), Haydon
patent: 3963903 (1976-06-01), Pirro et al.
Product Engineering, 18 Ways to Control Backlash in Gearing, Gutmann, Fredrick T., pp. 71-75.

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