Camera with improved shutter arrangement
US4192596A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1978 |
| Grant date | Mar 11, 1980 |
| Priority date | — |
| Expiry date | Jun 12, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B9/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A simple camera adapted for taking pictures with percussion-ignitable flashlamps. A striker element is cocked by movement against a spring and is retained in this position by spring-loaded sear lock. When the trigger is pivoted downward, the withdrawal of the sear lock causes the striker element to be driven in a straight line. An ear on the striker element hits a lug on a pivoted shutterblade and causes the shutterblade to swing against the bias of a light tension return spring to open the lens opening for predetermined time period until its return. When a flashlamp is employed, the firing pin portion of the striker element first contacts the torsion bar striker of the flashlamp, thus reducing the force subsequently imparted to the shutterblade and increasing the exposure time. The shutterblade is proportioned so that the lens opening is about 75 percent unobscured at the instant the flashlamp fires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.