Exposure identification accessory
US4182559A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 1978 |
| Grant date | Jan 8, 1980 |
| Priority date | — |
| Expiry date | Jul 3, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/243
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An accessory adapted for selective attachment to a film cassette for photographically recording indicia on a film unit within the cassette. The accessory includes a base plate having an integrated circuit (IC) chip mounted thereon, a light emitting diode (LED) display and pair of spring clips for electrically and structurally interconnecting the base plate and the display in spaced parallel relation. A pair of electrical contacts extend outwardly from the base plate for connecting the IC chip with the terminals of a battery when the accessory is attached to the film cassette. A collimating screen is mounted on the surface of the LED display facing the base plate such that when the accessory is attached to the cassette the base plate is in engagement with the rear wall of the cassette and the collimating screen extends into an exposure aperture in the cassette'forward wall and into engagement with an opaque cover sheet located within the cassette. Subsequent to the loading of the cassette into a camera, the cover sheet is removed from the cassette and the first of a plurality of film units is urged into its exposure position with a small corner portion of its exposure surface in eng…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.