Browse Prior Art Database

Actuating Transducer Heads

IP.com Disclosure Number: IPCOM000097088D
Original Publication Date: 1962-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Wheat, ME: AUTHOR

Abstract

The apparatus quickly raises and lowers magnetic transducer heads positioned in circumferentially spaced relation about the outer periphery of a magnetic drum. The transducer heads, when lowered, are supported on the laminar fluid about the rotating drum.

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Actuating Transducer Heads

The apparatus quickly raises and lowers magnetic transducer heads positioned in circumferentially spaced relation about the outer periphery of a magnetic drum. The transducer heads, when lowered, are supported on the laminar fluid about the rotating drum.

Actuator plate 10 is journalled on shaft 11 by annular bearing 12. It is connected by mechanical linkage, not shown, to the mechanism for raising and lowering the transducer heads, also not shown. Shaft 11 is connected through gearing to reversible motor 13 mounted by brackets 14 from one end of the drum frame. Shaft carries fitting 15 which, in turn, mounts spring actuator 16 having a pair of radially projecting arms.

Disposed on opposite sides of actuator 16 is a pair of spring assemblies 17 and 18. Assembly 17 comprises spring hub 19 having a radial slot 20 in it and a coil spring 21 whose ends are connected to plate 10 and hub 19. Similarly, assembly 18 has a coil spring 22 whose ends are attached to plate 10 and hub
23. Hub 23 also has a radial slot 24 in it.

Assume the transducer heads are lowered and riding on the laminar fluid about the drum. The condition of the apparatus at this time is shown in the end cross-sectional views. Spring 22 is de-energized and hub 23 and plate 10 are free to rotate through a limited angular distance with respect to actuator 16. Spring 21 is energized and plate 10 is held against rotation by a brake mechanism comprising solenoid 25 and brake band 2...