CAMERA DRIVE SYSTEM INCLUDING MOTOR DRIVE UNIT AND LONG-FILM MAGAZINE

• US 3,747,497 A
• Filed: 09/15/1972
• Issued: 07/24/1973
• Est. Priority Date: 09/20/1971
• Status: Expired due to Term

• Current Assignee: Nikon Corporation
• Original Assignee: Koichi Daitoku, Shiro Sugimori
• Inventors: Daitoku, Koichi, Sugimori, Shiro
• Primary Examiner(s): Greiner, Robert P.
• Application Number:
  US05/289,455
• Time in Patent Office: 312 Days
• Field of Search: 95/31EL,31AC,19,31CA 242/71.5,71.6
• US Class Current: 396/388
• CPC Class Codes: G03B 17/425 motor drive cameras

Abstract

A camera drive system in which a motor drive unit is adapted for use with a long-film magazine, the magazine having a frame counter switch which assumes control of the motor of the drive unit when the magazine and the drive unit are coupled together. A frame counter switch of the drive unit, which normally controls the motor of the drive unit, is rendered ineffective upon the coupling of the magazine to the drive unit. The long-film magazine has a motor which is controlled by a further switch of the drive unit, so as to advance the film cooperatively with the drive unit motor.

Claims

1. A motor Drive unit for a camera, comprising means including an electric motor for advancing film, a counter for counting the number of film frames, means including a switch associated with said counter for providing an energization circuit for said motor and for deenergizing said motor when said counter has reached a given count, and means for rendering said switch ineffective to provide an energization circuit for said motor and for providing another energization circuit for said motor independently of said switch.

2. A motor drive unit in accordance with claim 1, wherein the last-mentioned means comprises a long-film magazine having a film-frame counter and means including a switch associated with the last-mentioned counter for opening the last-mentioned circuit when the last-mentioned counter reaches a given count.

3. A motor drive unit in accordance with claim 1, wherein the last-mentioned means comprises a long-film magazine having means for coupling the same to said drive unit and for rendering said switch ineffective and providing said other energization circuit upon the coupling of said magazine to said drive unit.

4. A drive system for a camera, comprising a motor drive unit having means including an electric motor for advancing film in the camera, having a first film-frame counter means, and having first means including a first switch for controlling the energization of said motor in order to deenergize said motor when said first counter means reaches a given count;

a long-film magazine unit having a second film-frame counter means and having second means including a second switch for controlling the energization of said motor in order to deenergize said motor when said second counter means reaches a given count, and means for rendering said second means effective to control the energization of said motor instead of said first means.

5. A drive system in accordance with claim 4, wherein said motor drive unit and said long-film magazine unit include means for coupling the same and wherein said rendering means is responsive to said coupling.

6. A system in accordance with claim 5, wherein the last-mentioned means comprises a further switch in said drive unit in series with the first switch and means for opening the further switch when the drive unit and the long-film magazine unit are coupled.

7. A system in accordance with claim 5, wherein the last-mentioned means comprises means for selectively connecting a power source either directly to a circuit of said drive unit including said first switch or through a circuit of said long-film magazine unit to a circuit of said drive unit not including said first switch.

8. A system in accordance with claim 4, wherein said long-film magazine unit has means including a second electric motor for advancing film from said magazine, and wherein said drive unit has means including another switch for controlling said second electric motor cooperatively with said first electric motor to effect film advance.