1976-07-28
1977-09-27
Weldon, Ulysses
58125B, 58126A, 58 59, G04B 1924
Patent
active
040502333
ABSTRACT:
In a watch having a rotatably mounted date ring, a date-stepping mechanism for advancing the date ring comprises a stationary peripheral first series of teeth, a rotary drive element, a date-stepping finger, which is mounted to be rotatable and radially displaceable relative to said rotary drive element into and out of engagement with said first series of teeth and comprises a stepping pin, a forked end portion having first and second prongs, and a drive pin carried by said first prong. The date-stepping mechanism also comprises a one-way coupling element, which is in one-way coupling engagement with said drive pin and is eccentric with respect to and arranged to revolve with said rotary drive element in a predetermined direction of revolution and to repeatedly withdraw said date-stepping finger from said first series of teeth after respective intervals of time, and spring means engaging said second prong and urging said date-stepping finger radially outwardly and in said predetermined direction of revolution. Said spring means are adapted to impart a rotary stepping movement to said date-stepping finger in said predetermind direction of revolution and into engagement with said first series of teeth when said date-stepping finger has thus been withdrawn from said first series of teeth. The date-stepping mechanism also comprises a second series of teeth, which are carried by the date ring and arranged to be engaged by said stepping pin during said rotary stepping movement of said date-stepping finger.
REFERENCES:
patent: 3738097 (1973-06-01), Vuillenmier
patent: 3878674 (1975-04-01), Muerrle
Pforzheimer Uhren-Rohwerke Rudolf Wehner
Weldon Ulysses
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