Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1974-05-21
1978-02-14
Scott, James R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200159B, 200275, 200292, 200302, 174 685, 361400, 340365R, H01H 1370, H01H 900, H05K 116
Patent
active
040740889
ABSTRACT:
A keyboard-operated electronic apparatus such as an electronic calculator is made by forming a dielectric card with a plurality of recesses in one card side. Preferably the card is formed with a number of apertures extending through the card. Electrically conductive films are deposited in a selected pattern on the recessed card to define first and complementary contacts within each card recess and to define circuit paths which are connected to these contacts in a selected manner. Electrically conductive elements of a dished configuration are disposed in the respective card recesses to be located by the recesses in engagement with the first contacts in the recesses, and key means are mounted on the recessed card side for selectively moving the dished elements with snap action into an inverted dished configuration so that the elements further engage complementary contacts in the recesses to close selected circuits. Preferably a flexible film is secured over the card recesses for dust sealing the contacts and snap-acting elements in the recesses. Electronic components are mounted directly on the recessed card, preferably by inserting component terminals into card apertures to be connected to circuit paths on the card.
REFERENCES:
patent: 2262777 (1941-11-01), Roper
patent: 3133170 (1964-05-01), Nanninga
patent: 3749859 (1973-07-01), Webb et al.
patent: 3796843 (1974-03-01), Durkee et al.
patent: 3806673 (1974-04-01), Boulanger
patent: 3808384 (1974-04-01), Boulanger
patent: 3831063 (1974-08-01), Keough
IBM Technical Disclosure Bulletin, E. Uberbacher, "Multistage Through-Hole", vol. 10, No. 7, Dec. 1967, p. 882.
Butts Bruce D.
Keough Laurence J.
Haug John A.
McAndrews James P.
Scott James R.
Texas Instruments Incorporated
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