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:
Sep. 19, 1995
Filed:
Jul. 21, 1994
Robert O Campbell, Louisville, CO (US);
Thomas A Tacklind, San Martin, CA (US);
Quantum Corporation, Milpitas, CA (US);
Abstract
A magnetic latch for a disk file actuator comprises a latch plate formed of a magnetic material of low magnetic hardness located on the actuator; a core ferromagnetic material of medium magnetic hardness mounted relative to the base and surrounded by a coil. A power supply is selectively coupled to the coil for applying magnetizing/demagnetizing energy to the core. As the latch plate moves in a direction toward the core and a magnetizing force is applied by the power supply, the latch plate becomes drawn to and restrained by the core. When a demagnetizing force is applied to the coil by the power supply, the actuator is released from the latched position.