Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
110 words
A photographic film cassette for use in a camera comprising: a cylindrical housing; a rotatable film spool within the housing; a radial bar code formed on a disc rotatable in association with rotation of the film spool at least during rewind of film into the cassette, said bar code adapted to serve as an indicator of angular positioning of said disc at the conclusion of film rewind; and indicia means rotatable in association with rotation of the bar code disc for indicating, by the angular positioning of the indicia means at the conclusion of film rewind, the approximate amount of unexposed image frames available on the film in the cassette.
Claim 2
Dependent Claim
110 words
A photographic film cassette for use in a camera comprising: a cylindrical housing; a rotatable film spool within the housing; a radial bar code formed on a disc rotatable in association with rotation of the film spool at least during rewind of film into the cassette, said bar code adapted to serve as an indicator of angular positioning of said disc at the conclusion of film rewind; and indicia means rotatable in association with rotation of the bar code disc for indicating, by the angular positioning of the indicia means at the conclusion of film rewind, the approximate amount of unexposed image frames available on the film in the cassette.
Claim 3
Dependent Claim
64 words
The film cassette of claim 1 in which the indicia means is disposed on a rotating disc at one end of the cassette and the cassette includes a cover disposed over the indicia means, the cover having a window aligned with the path of the rotating indicia so that the amount of unexposed image frames is indicated by the indicia viewed through the window.
Claim 4
Dependent Claim
46 words
The film cassette of claim 2 in which the indicia comprises a continuous, gradually expanding arcuate band and the amount of unexposed image frames on the film is indicated by the degree to which the arcuate band fills up or does not fill up the window.
Claim 5
Dependent Claim
19 words
The film cassette of claim 2 in which the indicia means comprises alphanumeric gauge markings viewed through the window.
Claim 6
Dependent Claim
30 words
The film cassette of claim 1 in which the cassette further includes means for locking at least the indicia means in place whenever the cassette is removed from the camera.
Claim 7
Dependent Claim
55 words
The film cassette of claim 1 in which the indicia means is disposed on a disc attached to and rotatable with the film spool and in which the cassette further includes means for locking both the film spool and indicia disc in place and preventing rotation thereof whenever the cassette is removed from the camera.
Claim 8
Dependent Claim
88 words
The film cassette of claim 6 in which the locking means comprises a toothed gear wheel attached to the film spool and flexible locking fingers adapted to engage the gear wheel teeth when the cassette is removed from the camera thereby to prevent rotation of the film spool and indicia disc and to be disengaged from the gear wheel teeth by a mating camera member when the cassette is inserted into the camera thereby to allow free rotation of the film spool and indicia disc in the camera.