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Leposavic Wayne V: Multiple switch construction. Lematex Corporation, August 17, 1971: US3600528 (118 worldwide citation)

Multiple switches produced as a flat panel embodying the basic principle of laminates of electrical conductors in desired patterns assembled as stratifications in close proximity but separated by spacers and covered by resilient material facilitating momentary pushbutton operation of companion switc ...


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Leposavic Wayne V: Keyboard switch assembly with improved movable contact. Lematex, June 26, 1973: US3742157 (42 worldwide citation)

A multiple switch construction for a keyboard or the like produced as a flat panel embodying laminates of electrical conductors in desired patterns, assembled as stratifications in close proximity and separated by spacers. Individual depressible means operating through resilient members urge movable ...


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Leposavic Wayne V: System for preventing erroneous data output signals from an electrical keyboard. Lematex, March 13, 1973: US3720938 (13 worldwide citation)

In a mechanically operated keyboard employing keys each having a multiplicity of electrical switch contacts for providing an encoded electrical signal output corresponding to and uniquely identifying individual key stations, an electrical circuit provides a dummy load across the multiple switch cont ...


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Multiple switch constructions. Lematex, May 31, 1973: GB1318409-A

1318409 Retractive switches LEMATEX Inc 15 Sept 1970 [25 Sept 1969] 44003/70 Heading H1N A laminar multiple switch assembly comprises a non-conductive base panel 20, frame-like spacer means 23 disposed thereon to divide it into a plurality of switching areas 22, a fixed contact 21 in each area 22, a ...


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