Camera for use with a roll photo film
US5918083A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 18, 1998 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Feb 18, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B19/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera is used with a Brownie photo film, which has a photo filmstrip on which plural frames are formable serially. A light-shielding leader is disposed on a front end of the photo filmstrip. A light-shielding trailer is disposed on a rear end of the photo filmstrip. The Brownie photo film is wound about a supply spool with the trailer positioned inside and with the leader positioned outside. In the camera, a photo film supply chamber is formed for loading of the Brownie photo film. A photo film take-up chamber has a take-up spool disposed in a rotatable manner, for winding the Brownie photo film from the photo film supply chamber. The take-up spool has a spool core, and an insertion slit for receiving insertion of the leader through the spool core. A drive shaft in the photo film supply chamber rotates the take-up spool, to transport the Brownie photo film to the photo film take-up chamber and wind the Brownie photo film about the take-up spool. A motor rotates the drive shaft. A rotational detector switch detects a rotational position of the drive shaft. A controller controls the motor in accordance with a signal from the rotational detector switch, to set the drive shaft in at…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.