Dual stage flow controller for self-ventilating disk pack

Details Dual stage flow controller for self-ventilating disk pack Dual stage flow controller for self-ventilating disk pack

1978-09-01

1979-08-14

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

G11B 5016

Patent

active

041647688

ABSTRACT:
A self-ventilating flexible disk pack receives operating air through a plenum chamber which communicates with the atmosphere through a flow controller. The flow controller has primary and secondary flow passages through which the flow of air is controlled by primary and secondary valves. The primary valve is used to control the creation and termination of an access opening between preselected disks. Upon closing the primary valve the flow of air into the disk pack is blocked and a high vacuum is created which allows a preselected partial split to rapidly open into a full access opening. After the primary valve is closed, a secondary valve member moves to a position in which it is responsive to the pressure within the plenum chamber for restricting and regulating the flow of air so as to maintain a bistable condition maintaining the access opening.

REFERENCES:
patent: 3936880 (1976-02-01), McGinnis et al.
patent: 4051541 (1977-09-01), McGinnis et al.
patent: 4143408 (1979-03-01), McGinnis et al.

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