Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1983-01-28
1985-07-02
Brigance, Gerald L.
Communications: electrical
Audible indication
Percussion-type sound producer
400682, 248398, G06F 302
Patent
active
045271496
ABSTRACT:
A data display device has a manual input keyboard device that is infinitely adjustable with respect to its supporting surface between predetermined limits. The angular displacement mechanism that provides this adjustment is made up of a fixed arbor attached to the keyboard device and a rotating arbor attached to a foot. The arbors are axially aligned and rotatably connected together by a clutch coil spring. A manually operable push button mechanism on the keyboard device is linked to the tang of the coil spring so that when depressed, the tang is moved in a direction to unwind the coil spring, thereby permitting the locating arbor to rotate with respect to the fixed arbor, moving the foot away from the keyboard device. A tilt torsion spring is anchored to the movable arbor and connected to the keyboard device to cause the rotatable arbor to rotate when the push button is actuated thus moving the foot with respect to the keyboard device. Releasing the push button permits stopping the movement of the foot at any desired position.
REFERENCES:
patent: 3830352 (1974-08-01), Kolpek
patent: 3902034 (1975-08-01), Isozaki
IBM Technical Disclosure Bulletin, vol. 24, No. 12, May, 1982, "Keyboard Angle Adjustment", Kelley, Jr. et al.
IBM Technical Disclosure Bulletin, vol. 25, No. 4, Sep., 1982, "Adjustable Keyboard Mechanism", Frank et al.
IBM Technical Disclosure Bulletin, vol. 25, No. 6, Nov., 1982, "Keyboard Tilt Mechanism", Golledge.
IBM Technical Disclosure Bulletin, vol. 25, No. 8, Jan., 1983, "Keyboard Assembly", Greenfield et al.
Brigance Gerald L.
Devine Thomas G.
Heiting Leo N.
Sharp Melvin
Texas Instruments Incorporated
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