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US 4,310,233 AGranted
Film feed detecting device of a camera
AssigneeNippon Kogaku K.K.
InventorsTakeshi Okuyama, Toshiaki Hozumi, Hiroshi Wakabayashi
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AssigneeNippon Kogaku K.K.
InventorsTakeshi Okuyama, Toshiaki Hozumi, Hiroshi Wakabayashi
Estimating the term…
In a film feeding device of a camera including a take-up spool adapted to be rotated by a wind-up operating device to thereby take up on the outer periphery thereof a roll film loaded into a supply chamber, the film having an image recording portion and a leader portion of a smaller width than the recording portion, the image recording portion being taken up in subsequence to the take-up of the leader portion onto the take-up spool, the take-up spool having an outer peripheral surface which is not covered with the leader portion but can be covered only with the image recording portion, there is provided means cooperable with the outer peripheral surface of the take-up spool to detect the take-up of the film, the detecting means including signal means provided on said outer peripheral surface and signal detecting means engageable with the signal means and removed from said outer peripheral surface by the intervention of the image recording portion of the film with respect to said outer peripheral surface, and means for biasing the signal detecting means in the direction of engagement thereof with the signal means.
In a film feeding device of a camera including a take-up spool adapted to be rotated by a wind-up operating device to thereby take up on the outer periphery thereof a roll film loaded into a supply chamber, said film having an image recording portion and a leader portion of a smaller width than said recording portion, said image recording portion being taken up in subsequence to the take-up of said leader portion onto said take-up spool, said take-up spool having an outer peripheral surface which is not covered with said leader portion but can be covered only with said image recording portion, the improvement comprising:
In a camera including a film feeding device including a take-up spool adapted to be rotated by a wind-up operating device to thereby take up on the outer periphery thereof a roll film loaded into a supply chamber, and a shutter device for effecting the light-interception to said film and the exposure control, said film having an image recording portion and a leader portion of a smaller width than said recording portion, said image recording portion being taken up in subsequence to the take-up of said leader portion onto said take-up spool, said take-up spool having an outer peripheral surface which is not covered with said leader portion but can be covered only with said image recording portion, the improvement comprising:
In a camera including a film feeding device including a take-up spool adapted to be rotated by a wind-up operating device to thereby take up on the outer periphery thereof a roll film loaded into a supply chamber, and a shutter device for effecting the light-interception to said film and the exposure control, the improvement comprising:
Dependencies are inferred from the claim text.