Read/write head-positioning apparatus

Details Read/write head-positioning apparatus Read/write head-positioning apparatus

1978-07-21

1979-08-28

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

310 13, G11B 2108, G11B 555, H02K 4102

Patent

active

041662849

ABSTRACT:
A read/write head-positioning apparatus for positioning one or more heads in a disk recorder and including a magnetic stator assembly having a coaxial, longitudinally-extending, annular coil-receiving cavity and a pair of longitudinally-extending, air bearing forming passageways provided therein, and an armature assembly including a pair of main bearing shafts disposed to pass through the passageways and a member affixed to the shaft ends for carrying a cylindrical coil support adapted to carry a drive coil within the coil-receiving cavity and for receiving the head-carrying arms. A pump is coupled to the stator assembly to create an air bearing flow in the passageways around the main bearing shafts so that electromagnetic interaction between the drive coil and the magnetic stator assembly can be used to position the recording heads with a minimum of frictional resistance.

REFERENCES:
patent: 3074269 (1963-01-01), Wohl
patent: 3417269 (1968-12-01), Heller et al.
patent: 3586891 (1971-06-01), Applequist et al.

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