The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 12, 1983
Filed:
Nov. 24, 1980
Robert J Vagi, Broadview Heights, OH (US);
Picker Corporation, Cleveland, OH (US);
Abstract
An X-ray spot filmer is disclosed including a system for cyclically shifting a grid assembly interposed between an X-ray source and a film cassette. The system comprises an electrically energizable grid assembly actuator and an actuator controller for energizing the actuator to cyclically shift the grid assembly. The actuator controller includes actuator energizing output circuitry effective to govern the direction and speed of operation of the actuator in response to a control signal and control signal generator circuitry for producing control signals effective to govern operation of the output circuitry including an oscillator for producing a cyclically varying control signal which causes cyclic grid assembly shifting.