Resettable gravity timer

Details Resettable gravity timer Resettable gravity timer

1990-10-11

1991-06-11

Miska, Vit W.

Horology: time measuring systems or devices

Time interval

Gravity actuated type

G04F 104

Patent

active

050238523

ABSTRACT:
A gravity timer of the hour-glass type having a pair of chambers which communicate through an intermediate portion in which a restrictor valve is normally seated in order to regulate the rate of flow of a granular material therethrough and which valve may be selectively opened so that the granular material contained within one chamber may freely pass to the other chamber.

REFERENCES:
patent: 3125849 (1964-03-01), Wachtel
patent: 3240007 (1966-03-01), Dock et al.
patent: 4527905 (1985-07-01), Kehls

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