Calendar day and date watch

Claim 1

In a day and date indicating calendar watch including a dial, a clock mechanism, a ring-toothed, rotatably-supported calendar crown carrying date-indicating means in an annular array, a rotatable star wheel carrying day-indicating means, and advancement means mechanically coupled to said crown and to said star wheel and operative to shift each said crown and said star wheel rotationally in incremental steps at 24 hour intervals, the improvement wherein said advancement means comprises: first cam means and means coupling said first cam means to the clock mechanism for rotatably driving said first cam means at a rate of one revolution per day, said first cam means periodically engaging and advancing said star wheel in incremental steps at 24 hour intervals to provide correct day indications on the dial of said watch, a plate-like platen affixed to said watch and having a shaft guide-groove formed therein, second cam means including a transversely disposed shaft constituting a rotational axis of said second cam means, said shaft being supported for linear travel in said guide groove formed in said plate-like platen, gear means and means coupling said gear means to said second cam means for rotating said cam means about its axis at a rate of n revolutions per day, n being an integer greater than one, means for periodically, reciprocally shifting the axis of said second cam means along said guide groove between a rest p position wherein said second cam means is free from engagement with teeth of said ring-toothed calendar crown and a displaced position wherein said second cam means stressingly engages a tooth of said ring-toothed calendar crown to urge said crown forward annularly, thereby to advance crown-carried said dateindicating means one incremental step for each n revolutions of said second cam means to provide sequential date indications on the dial of said watch.