Method of centering an X-ray film cassette or like object inserted in a holder, in respect to an X-axis in which the cassette can be so centered
US4675894A · kind A · utility
4Cited by
4References
7Claims
0Family size
Inventor
Key dates
| Filing date | Sep 28, 1984 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Sep 28, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B42/025
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A "Potter-box" (1) has a holder or Potter-spade (2) provided with dogging means (5, 6) for centering an X-ray film cassette, or some other X-ray radiation receiver, in the direction of an X-axis and a Y-axis. Movement of the holder between a cassette-change position and a film-exposure position and vice versa, is utilized to drive the dogging means (5, 6) directly via a link system, so as to center or decenter the cassette, thereby rendering the provision of separate operating means for effecting centering or decentering of the cassette unnecessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.