Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1974-11-29
1976-04-20
Scott, James R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200159B, 200275, 200302, H01H 1352, H01H 106
Patent
active
039521745
ABSTRACT:
A pushbutton keyboard system comprising an electrically insulative substrate, a plurality of actuating elements or disks arranged in an array of columns and rows on one face of the substrate, and a plurality of conductors on this one face of the substrate with the conductors being parallel to one another and extending in the direction of the columns. There is one conductor for each row of elements and one conductor for each column of elements with each respective column conductor being disposed between the substrate and the elements of its respective column. Each of the conductors is a wire of generally round cross-section. The elements in each of the rows are electrically connected to their respective row conductor, whereby upon moving any one of the elements to its overcentered actuated position, a circuit is completed between the column conductor and the row conductor of the actuated element.
REFERENCES:
patent: 3684842 (1972-08-01), Boulanger
patent: 3743798 (1973-07-01), Pentecost
patent: 3749859 (1973-07-01), Webb et al.
patent: 3879586 (1975-04-01), DuRocher et al.
patent: 3886335 (1975-05-01), Hendricks
Boulanger Henry J.
Midon William J.
Baumann Russell
Haug John A.
McAndrews James P.
Scott James R.
Texas Instruments Incorporated
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