Camera

• Main Authors: MORISHIMA; HIDEKI, KAWAMURA; MASAHARU, HARAGUCHI; SHOSUKE
• Format: Patent
• Language: English
• Published: 20.03.1990
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS

A motor-driven camera of the so-called prewind type in which a film is preliminary wound to effect a prewinding action and then the film is rewound for every photographing shot, includes an electric film counter which counts the number of frames on the basis of a signal generated according to the movement of the film; a control circuit which determines the number of photographable frames on the basis of a counted value of the electric film counter; a detection circuit which detects the completion of the prewinding action by detecting that the film ceases to move; and a judgment circuit which is arranged to detect the state of the above-stated signal after the lapse of a predetermined period of time from the completion of the prewinding action detected by the detection circuit, to judge whether or not a change in the counted value of the electric film counter is necessary.