Linear actuator

Details Linear actuator Linear actuator

1978-03-27

1981-01-27

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Linear

310 27, H02K 4100

Patent

active

042477948

ABSTRACT:
A linear motor actuator particularly adaptable to position a magnetic transducer in a magnetic disk storage system including a modular stator assembly and a modular carriage assembly. The stator assembly includes a frame with a first pair of spaced parallel guide rails; configured to have two flat guide surfaces adjacent to the carriage assembly and running in a direction parallel to the stroke of the actuator. A magnetic flux return path is integrally connected with a guide shaft and positioned between the guide rails. The carriage assembly includes a self supporting cantilevered coil positioned about the return path and guide rail, and offset from the flat surface. The carriage assembly is supported by a first set of angled ball bearings which ride on the guide shaft and a second set of spaced ball bearings which ride on the guide rails to preload the carriage assembly and prevent rotation.
A linear tachometer strip is attached to the carriage assembly and associated with a light emitting/light receiving assembly to produce electrical signals indicative of the carriage assembly position.

REFERENCES:
patent: 3521092 (1970-07-01), Kalthoff
patent: 3577023 (1971-05-01), Bleiman
patent: 3587075 (1971-06-01), Brown et al.
patent: 3666977 (1972-05-01), Helms et al.
patent: 3735163 (1973-05-01), Dijkstra et al.
patent: 3743870 (1973-07-01), Hunt
patent: 3760206 (1973-09-01), Hertrich
patent: 3889139 (1975-06-01), Hughes
patent: 3899699 (1975-08-01), Griffing
patent: 4006372 (1977-02-01), Brown, Jr. et al.
patent: 4072101 (1978-02-01), La Garcia et al.

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