Metering apparatus

Details Metering apparatus Metering apparatus

1994-08-04

1996-09-10

Gellner, Michael L.

354213, 354214, G03B 1742, G03B 100

Patent

active

055550533

ABSTRACT:
A metering apparatus for a filmstrip forms with at least one perforation for each film frame including a metering member which is configured for engaging at least one perforation for each film frame, so as to prevent the filmstrip from moving in a film advancing direction. According to the invention, the metering member includes at least one cam follower for contacting a trailing edge of a perforation to cam the metering member out of engagement with the filmstrip when the filmstrip is moved in an opposite film rewinding direction. The metering apparatus also includes a mechanism for retracting the metering member to allow the filmstrip to be subsequently advanced for film frame exposure. The retracting mechanism is mechanically coupled to the release of a high energy lever used for tripping the shutter blade of a camera so that advancement and exposure of the filmstrip can be controlled in a simple manner.

REFERENCES:
patent: 3724348 (1973-04-01), Monks
patent: 4223990 (1980-09-01), Edwards
patent: 4437749 (1984-03-01), Ehgartner et al.
patent: 4437751 (1984-03-01), Engelsmann et al.
patent: 4914462 (1990-04-01), Pagano
patent: 4948063 (1990-08-01), Niedospial, Jr.
patent: 5008692 (1991-04-01), Diehl et al.
patent: 5023640 (1991-06-01), Diehl
patent: 5410380 (1995-04-01), Kawamura et al.

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