Electric perpetual calendar

Details Electric perpetual calendar Electric perpetual calendar

1985-10-15

1987-09-22

Mancene, Gene

Card, picture, or sign exhibiting

Calendars

Double reel and web

40112, 40471, G09D 310

Patent

active

046945970

ABSTRACT:
A perpetual calendar, particularly a perpetual calendar that can be electrically operated to show the date, the week-day, and the month. The calendar comprises a round wheel or case driven by a gear to rotate one cycle per 24 hours, and the peripheral edge of the round case has a cam for contacting a micro-switch which can trigger a circuit to drive a motor for rotating an eccentric wheel. A retractable rod can be driven by a pin on the eccentric wheel and move downwards to pull the date pulling rod and the week-day pulling rod downwards, and then a ratchet wheel will be driven to rotate, and a positioning piece in the notch of the ratchet wheel will cause the loose-leaves showing date and week-day to advance. A control lever can be engaged in a notch of the month pulling rod, and with the notch of a wheel, the month pulling rod will be pulled downwards by the control lever, through the rotation of the ratchet wheel, to change the month, thereby cyclically and automatically changing the date, the week-day and the month.

REFERENCES:
patent: 19519 (1858-03-01), Skinner
patent: 2458092 (1949-01-01), Morris
patent: 2719372 (1953-10-01), Wolfang
patent: 2886910 (1959-05-01), Koci

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