Indicator for indicating the presence or absence of a photo sens

Details Indicator for indicating the presence or absence of a photo sens Indicator for indicating the presence or absence of a photo sens

1985-03-29

1987-03-31

Gellner, Michael L.

3542891, G03B 1718, G03B 1726

Patent

active

046538887

ABSTRACT:
An indicator according to the present invention is used to indicate the presence or absence of a photo sensitive material in a film holder. The indicator comprises a pivotal indicator element and a actuating element. The pivotal indicator element has a pivot at its one end and is mounted on the surface of the film holder near its exposing window. The actuating element is adapted to be moved interlockingly with the pivot upon the insertion of the photo sensitive material and is provided facing a photo sensitive material receiving channel.

REFERENCES:
patent: 461905 (1891-10-01), Hare et al.
patent: 512914 (1894-01-01), Spalsbury
patent: 970494 (1910-09-01), Halle
patent: 1143462 (1915-06-01), Teige et al.
patent: 2946271 (1960-07-01), Craig
patent: 3091168 (1963-05-01), Craig
patent: 4248172 (1981-02-01), Krobel et al.

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