Active electromagentic latch having no moving parts for disk fil

Details Active electromagentic latch having no moving parts for disk fil Active electromagentic latch having no moving parts for disk fil

1994-07-21

1995-09-19

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

335179, G11B 554, H01H 900

Patent

active

054521629

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.

REFERENCES:
patent: 3914723 (1975-10-01), Goodbar
patent: 4139874 (1979-02-01), Shiraishi
patent: 4538193 (1985-08-01), Dimmick et al.
patent: 4594627 (1986-06-01), Viskochil et al.
patent: 4647997 (1987-03-01), Westwood
patent: 4654735 (1987-03-01), Izraelev et al.
patent: 4660120 (1987-04-01), Manzke et al.
patent: 4686595 (1987-08-01), Bryer
patent: 4692829 (1987-09-01), Campbell
patent: 4706142 (1987-11-01), Hattori et al.
patent: 4716480 (1987-12-01), Wiens et al.
patent: 4751595 (1988-06-01), Kistli et al.
patent: 4764831 (1988-08-01), Patel
patent: 4851943 (1989-07-01), Perry
patent: 4868695 (1989-09-01), Quatro et al.
patent: 4881139 (1989-11-01), Hazebrouck
patent: 4890176 (1989-12-01), Casey et al.
patent: 4903157 (1990-02-01), Malek
patent: 4947274 (1990-08-01), Casey et al.
patent: 4965684 (1990-10-01), Stefansky
patent: 5025335 (1991-06-01), Stefansky
patent: 5208713 (1993-05-01), Lindsay et al.
patent: 5361182 (1994-11-01), Sampietro
Fink, Donald G. and Beaty, H. Wayne; Standard Handbook for Electrical Engineers; 1987; 4-112 Through 4-115.

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