# US 4,396,266 A · Motor drive device

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- Number: US 4,396,266 A
- Document ID: US4396266A
- Status: Granted
- Kind: A
- Application number: 06/401,245
- Filed: 1982-07-23
- Granted: 1983-08-02
- Earliest claimed: 1980-03-13
- Assignees: Nippon Kogaku K.K.
- Inventors: Tetsuro Goto
- Web page: https://patentgrep.com/patent/US4396266A

## CPC

- G03B 17/425: {motor drive cameras}
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

In a motor drive device mountable on a camera having manually operable first switch means, a magnet adapted to be energized by actuation of the first switch means and release a shutter, and first release lock means manually operated to render only the first switch means inoperable, there is provided manually operable second switch means adapted, when mounted on the camera, to be parallel-connected to the first switch means, and second release lock means manually operated to render only the second switch means inoperable.

## Claims

### Claim 1

In a motor drive device mountable on a camera, said camera having:
first switch means operable to effect power supply to an electric circuit in the camera,
second switch means operable to effect a shutter release operation,
a magnet energized upon actuations of said first and second switch means to release the shutter,
first disabling means operable to disable power supply effected by the first switch means,
the improvement comprising:
third switch means operable, when mounted on said camera, to be parallel-connected to said first switch means to effect power supply to the camera,
fourth switch means operable, when mounted on said camera, to be parallel-connected to said second switch means and to release the shutter, and
second disabling means operable to disable power supply effected by said third switch means.

### Claim 2 (depends on 1)

A motor drive device according to claim 1, wherein
said second disabling means is connected in series with said third switch means.

### Claim 3

In a motor drive device mountable on a camera, the camera having first switch means operable to effect power supply therethrough to an electric circuit in the camera, and first disabling means operable to disable power supply effected through the first switch means,
the improvement comprising:
second switch means adapted, when mounted on said camera, to be parallel-connected to said first switch means; and
second disabling means operable to disable power supply effected through said second switch means.

### Claim 4 (depends on 3)

A motor drive device according to claim 3, wherein
said second disabling means is connected in series with said second switch means.