Perpetual calendar

Details Perpetual calendar Perpetual calendar

1976-02-23

1977-04-05

Pitrelli, John F.

Card, picture, or sign exhibiting

Calendars

Character markers

40 65, G09D 300

Patent

active

040153517

ABSTRACT:
A perpetual calendar operated by finger pressure wherein there is a base portion formed with horizontal grooves and including an overlay covering said base, the overlay has horizontal rows of etched transparent indicia. A plurality of slidable color plates are appropriately mounted in said grooves and when moved under said etched transparent indicia, visual registration of the specific transparent indicia is accomplished. The invention also includes color plate propelling means associated with the color plates extending exteriorly of said base and overlay for finger movement to slide the color plates into appropriate registry.

REFERENCES:
patent: 2871595 (1959-02-01), Pearce
patent: 3402694 (1968-09-01), Christman
patent: 3596390 (1971-08-01), Scalice
patent: 3827168 (1974-08-01), Mori

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