Elapsed time indicator

Details Elapsed time indicator Elapsed time indicator

1978-09-07

1980-06-17

Miska, Vit W.

Horology: time measuring systems or devices

Time interval

Electrical or electromechanical

368 78, 368124, 368222, G04F 800, G04B 1500, G04B 1902

Patent

active

042077338

ABSTRACT:
An elapsed time indicator is provided which performs accurate and reliable time measurements. The device includes an indicator assembly having a plurality of numbered wheels drivingly coupled to a drive wheel having a plurality of upstanding peripheral teeth. A verge escapement mechanism employs a side acting verge member which moves in a predetermined plane and acts on only one side of the drive wheel. The peripheral teeth of the drive wheel cooperate with the verge member to move the drive wheel through predetermined intervals and drive the numbered wheels of the indicator assembly. An electromagnet pulsed by a solid state time base and driver circuit oscillates the verge member to advance the drive wheel and to operate the indicator assembly.

REFERENCES:
patent: 1223778 (1917-04-01), Ericson
patent: 2946227 (1960-07-01), Denton et al.
patent: 3439545 (1969-04-01), Siot
patent: 3657875 (1972-04-01), Radnik et al.
patent: 3817027 (1974-06-01), Wittner
patent: 3901436 (1975-08-01), Van Bennekom et al.
patent: 3908353 (1975-09-01), Graziano
patent: 3910028 (1975-10-01), Suard
patent: 3931705 (1976-01-01), Iwaki et al.
Bickford, John, Mechanisms for Intermittent Motion, 1972, Industrial Press, pp. 176-180.

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