Photographic camera with a release locking device
US4249816A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1979 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Apr 2, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/42
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A release locking device for use in photographic cameras of the type in which an exposure meter and electro-magnetic actuating and releasing means for automatic exposure control are rendered operative in separate manner by their respective control or release switches as may be operatively associated with a display button and a shutter release button respectively. This device comprises a master switch connected between an electrical power source and a common input lead of these release switches to be closed and opened in response to an actuation and a release, respectively, of a manually operable member, thereby all of the release switches are rendered effective and ineffective at a time. In a preferred embodiment, this device is operatively associated with a shutter cocking mechanism to be actuable in automatic response to a protracting movement of the shutter cocking lever into an effective range of shutter cocking operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.