Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1977-04-06
1979-07-17
Caldwell, Sr., John W.
Communications: electrical
Audible indication
Percussion-type sound producer
74471XY, 200 6A, G06F 302
Patent
active
041617266
ABSTRACT:
A digital joystick control includes an elongated shaft member having a spherical ball at one end thereof. First and second socket members are coupled to the joystick to provide a swivel joint between the ball and the socket members enabling movement of the shaft about the ball in any direction; movement of the joystick effects corresponding movement of the socket members. Each of the socket members is connected to a plate member which moves therewith. The plate members have a patterned surface presenting conductive and non-conductive regions in opposing relation to wiper arms which engage the patterned surfaces. The patterned surfaces are coded in such a manner that the locations of the conductive and non-conductive regions of the patterned surfaces with respect to the wiper arms are changeable in response to movement of the shaft of the joystick whereby a unique digital-coded positional signal is generated for preselected incremental positions of the shaft.
REFERENCES:
patent: 3056867 (1962-10-01), Eitel
patent: 3268885 (1966-08-01), Coyle et al.
patent: 3629775 (1971-12-01), Kindred
patent: 3745966 (1973-07-01), Seager
patent: 3770915 (1973-11-01), Bennett
patent: 3795882 (1974-03-01), Tokubo
patent: 3824354 (1974-07-01), Anderson et al.
IBM Technical Disclosure Bulletin, "Coded Sphere Joystick", Carmichael, vol. 19, No. 6, Nov. 1976, pp. 2226-2227.
Burson David C.
Larson Harold D.
Caldwell Sr. John W.
Groody James J.
McCord William K.
Sadacca Stephen S.
Sharp Melvin
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