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:
Dec. 18, 1990
Filed:
May. 02, 1988
Karl Klos-Hein, Wettenberg, DE;
Horst H Rumpf, Herborn-Schonbach, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
The invention relates to a device for changing the position of a functional element in an electrical apparatus. The particular the head-mounting plate in a magnetic-tape apparatus, the functional element being mechanically movable between a rest position towards which it is spring loaded, and two spaced-apart operating positions, i.e. a first operating position and a second operating position. The functional element is electromagnetically held in the first operating position by an electromagnetic device and, when it leaves said first position owing to the electromagnet device being de-energized, can be held in the second operating position with the aid of the mechanical holding function provided by a mechanical holding device. The mechanical holding device is constructed in such a way that when the functional element is released from the first operating position it can hold said element in the second operating position for a limited time only because its holding force is smaller than the return spring force acting on the functional element. In order to hold said element in the second operating position for a longer time, the mechanical holding function provided by the mechanical holding device can be backed up by an additional magnetic holder acting on the holding device (137).