Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1978-01-06
1980-06-10
Scott, James R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200159B, 200292, H01H 1370
Patent
active
042074444
ABSTRACT:
The frequency capability of a planar multiple switch for entry of digital data is improved by forming an upper conductive planar member from fine conductive elements electrically joined, such as a screen or conductor pattern, together but with sufficient space between elements to substantially reduce capacitive coupling between the upper member and lower contact members. Further, multiple bit switch areas are formed adjacent single bit switch areas; and coded contact areas are formed on parallel lines by placing insulation on selected sections of lines and building up adjacent contact sections by additional conductor material.
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Standard Handbook for Electrical Engineers, Fink and Carroll, Tenth Edition, McGraw Hill, Chapter 2, "Electric and Magnetic Circuits", pp. 2-28 to 2-31, Sec. 2-116.
IBM Tech. Disc. Bull., Lester et al., "Switch", vol. 11, No. 11, 4-1969, p. 1569.
Kley, Fitting, Fitting, Nalley and Smith
Scott James R.
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