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US 3,974,638 AGranted
Hourglass watch
OwnerTerry M. Haberinventor
Life of this patent
Estimating the term…
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.
Claims6
An hourglass watch including, in combination:
- a. a watch casing incorporating battery means and defining a shallow cavity in its top exterior surface;
- b. display means in said cavity for providing a digital indication of the time;
- c. illuminating means in said casing for rendering visible said display means when actuated;
- d. a closed chamber of hourglass configuration disposed in said cavity and incorporating electrically conducting granules;
- and,
- e. electrodes connected to said battery means and to said illuminating means to actuate said illuminating means when electrically bridged, said electrodes being in opposed relationship in the constricted central portion of said hourglass in positions to be electrically bridged together by the flow of said granules under gravity from one portion of the closed chamber to the other portion, whereby said illuminating means may be actuated by holding said watch casing in a position to cause the granules to flow past said constricted portion of the hourglass under the influence of gravity.
3 more elements
Dependencies are inferred from the claim text.