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US 4,073,130 AGranted
Chime clock with minute hand shaft rotatable in both directions
AssigneeSpartus Corporation
InventorChristian M. J. Jauch
Life of this patent
Estimating the term…
Abstract
A chime clock has a cam mounted to rotate with the clock's minute hand shaft. A cam-follower mechanism actuates striking mechanism in response to clockwise rotation of the minute hand shaft and cam. Structure is provided to prevent the cam-follower from obstructing rotation of the cam and minute hand shaft in a counterclockwise sense, as when setting the clock's minute hand by turning it backwards.
Claims9
In a clock having a minute hand shaft capable of rotation in both clockwise and counterclockwise senses:
- a cam having at least one cam step with an edge;
- means mounting said cam for rotation in said clockwise and counterclockwise senses with said minute hand shaft;
- cam follower means comprising a lever;
- means mounting said lever for pivotal movement toward and away from said cam;
- first biasing means normally urging said lever toward said cam;
- finger means carried on said lever for engaging the periphery of said cam;
- means mounting said finger means on said lever for movement between (a) an operative first position in which said finger means is disposed to engage the periphery of said cam and obstruct counterclockwise rotation of said cam and (b) a displaced second position in which the finger means is incapable of engaging the periphery of said cam or of obstructing said counterclockwise rotation;
- second biasing means normally urging said finger means to its first position;
- and means on said finger means and on the edge of said cam step cooperating to move said finger means to its second position in response to counterclockwise movement of said cam.
6 more elements
Dependencies are inferred from the claim text.