X-ray spot filmer
US3989950A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1974 |
| Grant date | Nov 2, 1976 |
| Priority date | — |
| Expiry date | Oct 7, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B42/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An X-ray apparatus includes a spot filmer for feeding sheet of unexposed film one at a time into a vacuum evacuable assembly for exposure, and for returning exposed film sheets to an exposed film magazine. The spot filmer has a housing defining a light tight enclosure. The film magazines are insertable through a door into the housing and into a film feed mechanism. The film feed mechanism unlatches, opens and positions the magazines; feeds a sheet of unexposed film into the vacuum evacuable assembly; releases the film sheet so the assembly can position the film sheet for exposure; and closes the film magazines. An orthogonal drive system positions the vacuum evacuable assembly to expose selected film sheet portions, and returns the assembly to a retracted position. The film feed mechanism opens the magazines; feeds the exposed film sheet into the exposed film magazine; and closes the magazines. Sensed infra-red radiation reflected from a film sheet is used to detect the travel of a film sheet between the magazines and the assembly and to initiate the operation of certain components of the system. Limit switches engageable with a number of the movable components initiate the subsequ…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.