Film feeding indication device for camera
US4678306A · kind A · utility
8Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1985 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Oct 15, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B17/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film feeding indication device of the type in which as a number of pulses, proportional to the distance the film has advanced, are formed, when the produced pulse number reaches a prescribed value, an indication representing the completion of film feeding is presented. The indication device, despite the produced pulse number becomes unable to reach the aforesaid prescribed value, forcibly presents that indication provided that a particular minimum value is reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.