Motor-drive controlling apparatus
US3940776A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 1974 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | May 13, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/425
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A motor-drive controlling apparatus used in attachment with a still camera includes a motor circuit having a motor for driving the shutter releasing mechanism and the film winding mechanism of the still camera, a motor-driven switch, and a shutter switch actuated interlockingly with the shutter releasing mechanism. At least one operating switch controls the operation of a timer circuit in association with that of the shutter switch. The timer switch varies its output condition when it is successively operated longer than a length of time from the end of operation of the shutter switch to the start of the next operation thereof. A control circuit operates in response to the output condition of the timer circuit for controlling the energization of the motor in association with the motor-driven switch and the shutter switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.