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:
Jun. 21, 1977
Filed:
Mar. 26, 1975
Leslie James Sell, Orangeville, CA;
Picker X-Ray Mfg. Limited, Bramalea, CA;
Abstract
Relative translational movement between a pair of X-ray apparatus components is selectively arrested by a bidirectional lineal lock structure including an elongated locking rod carried by one of the components and a locking unit carried by the other component. The locking unit is movable along the locking rod and includes two sets of balls which selectively engage the peripheral surface of the rod. Two clamping systems normally wedge the balls into clamping engagement with the peripheral surface, preventing relative, component movement. A pair of electromagnets are operative, when energized, to bias the clamping systems toward release positions to permit relative componet movement. Either of the electromagnets may be selectively energized to permit unidirectional relative movement between the components. An energizing circuit is provided for briefly reversing the polarity of the electromagnets immediately before they are de-energized, to faciliate re-establishment of the clamping engagement.