Camera film stop position adjusting mechanism
US4236800A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1979 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Jul 23, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B1/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A film stop position adjusting mechanism with a stop lever (3) having a stop pawl (3a) engaged with a ratchet gear (2) and adapted to stop the feeding of a film. A ratchet releasing lever (7) holds the stop lever (3) at a release position, with the ratchet releasing lever having a bent portion (7a) and an extended portion (7b). A locking lever (11) has a step (11a) which engages the bent portion (7a) of the ratchet releasing lever to lock the ratchet releasing lever (7). A detection lever has a protrusion (15a) which is inserted into a perforation of the film to detect a film stop position, and an arm (15b) having a straight edge substantially perpendicular to a film feeding direction. The locking lever (11) is provided with an eccentric pin (10) whose position can be adjusted by rotation. The eccentric pin (10) is engaged with an arm (15b) of the detection lever adapted to detect a film stop position by inserting the protrusion (15a) into a film perforation. The film stop position is adjusted by changing the timing at which the step (11a) is disengaged from the bent portion (7a).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.