Film feeding circuit
AssigneeRicoh Company, Ltd.
InventorAkira Takahashi
Life of this patent
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Abstract
A film feeding circuit operates to feed a film of a camera in response to a drive from a motor. Perforations formed in the film are detected at a given location, and counted by a counter. The count in the counter controls the energization of the motor. When the count reaches a predetermined number, the speed of movement of the film is reduced. In the absence of a film, the counter is counted by a pseudo signal. A power supply is turned off at the termination of a film feeding operation.
Claims14
Film feeding circuit comprising a motor for feeding a film in a camera by a distance corresponding to one frame thereof at the termination of a shutter operation, a perforation detecting circuit operative to detect a perforation in the film being fed at a given location and to produce a perforation signal, a counter for counting the perforation signal, first means responsive to the termination of a shutter operation for driving the motor until a count in the counter reaches a first predetermined value, and control means for controlling the film feeding operation which control means causes the speed of the motor to be reduced after the count in the counter reaches a second predetermined value which is less than said first predetermined value.
Dependencies are inferred from the claim text.