Electric motor drive device for camera
US4435061A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1982 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | Jun 2, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/425
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electric motor drive device for a camera is arranged such that, in cases where power supply to a film winding motor is stopped with the camera still in an incomplete winding state and when the film comes to the end thereof after completion of a photographic operation on every frame, the power supply to the motor is resumed in response to a film rewinding completion signal produced from a film detection switch upon completion of film rewinding so that the camera can be brought into a winding completion state. This arrangement solves the problem of phase discrepancy arising between the camera body and the electric motor drive device when they are separated from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.