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US 4,106,282 AGranted
Escapement mechanism for watch
AssigneeMattel, Inc.
InventorAke Lennart Larsson
Life of this patent
Estimating the term…
Abstract
A mechanical spring-powered hand-held digital stopwatch having a gear-operated decade counter display assembly, a spring-powered windup mechanism adapted to reset the counter during winding and a cam adjustable timing escapement mechanism, the escapement mechanism including an escapement gear actuating a balance through a limited pivotal angle, the angle of pivoting being governed by cam means interposed between a pair of arms carried by the balance.
Claims4
In a mechanical watch for measuring a period of elapsed time, the combination comprising:
- a housing having a display window;
- spring means within the housing;
- windup means for winding said spring means;
- an output display means for indicating the elapsed time measurement;
- an escapement mechanism having a balance pivotable through a predetermined angle;
- cam means coacting with said balance and adjustable to set said predetermined angle;
- other means coupling said spring means, said display means and said escapement mechanism;
- and
- switch means operable to enable said spring means to actuate said display means under control of said escapement means through said other means.
6 more elements
Dependencies are inferred from the claim text.