Hourglass watch

Details Hourglass watch Hourglass watch

1975-09-04

1976-08-17

Jackmon, E. S.

Electricity: circuit makers and breakers

Multiple circuit control

Pivoted contact

58 88G, 58144, 200 6145R, 200 6147, 200DIG18, G04B 1930, G04B 3708, G04F 106, H01H 3502

Patent

active

039746380

ABSTRACT:
A quartz-operated digital watch is provided with a casing defining a shallow cavity within which a chamber of hourglass configuration is disposed. This hourglass chamber includes gold dust or particles which, when caused to flow from one chamber portion to another, bridge two electrodes to complete a circuit and render the digital display visible.

REFERENCES:
patent: 3707842 (1973-01-01), Spivak
patent: 3742699 (1973-07-01), Bergey
patent: 3841080 (1974-10-01), O'Donald

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