Perpetual calendar

Card – picture – or sign exhibiting – Calendars – Rotatable

Patent

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Details

40111, 40109, 40335, G09D 306, G09D 310, G09F 300

Patent

active

043763464

ABSTRACT:
First and second superposed members are mounted for relative back and forth movement along a predetermined path and one of the members has a generally rectangular window formed therein. The other of the members includes number indicia arranged in seriatim repetitively in coordinates of seven extending along the path with the coordinates spaced transversely of the path. The window is of a dimension transverse to the path to view the six laterally spaced coordinates of indicia therethrough and of a dimension longitudinally of the path to view seven indicia in each coordinate. A view masking panel is disposed intermediate the first and second members and includes a pair of elongated side-by-side indicia masking zones thereof extending along the path and including one pair of corresponding ends facing in one direction along the path and staggered lengthwise relative to the path a distance equivalent to at least seven of the indicia spaces. The view masking panel is shiftable along the path relative to the first and second members and may be utilized to selectively mask portions of two of the coordinates of indicia spaces extending along one side of the aforementioned path.

REFERENCES:
patent: 475156 (1892-05-01), Roe
patent: 1063814 (1913-06-01), McGovern
patent: 1571828 (1926-02-01), White
patent: 1692392 (1928-11-01), Stevenson
patent: 2567395 (1951-09-01), Peterson, Jr.
patent: 3731415 (1973-05-01), Shore

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