David P Chandler: Switch apparatus. Mattel, John G Mesaros, Max E Shirk, Ronald M Goldman, January 20, 1981: US04246452 (263 worldwide citation)

A switch apparatus having first and second surfaces with conductive pattern segments thereon in proximate spaced overlying relation, each of the patterns being generally identical and having a circular array of alternating solid and interleaved conductive portion, one pattern being movable toward th ...

Kenji Inoue, Futoshi Matsui, Kouichi Santo: Push button switch assembly including single or plural sequentially closed switches. Matsushita Electric Industrial, Ratner & Prestia, May 17, 1994: US05313027 (207 worldwide citation)

A push switch is capable of performing a first switching operation and subsequently a second switching operation when a pressing force is applied to the switch. The push switch includes (a) an insulating membrane having at least one dome with at least a portion thereof overlaid by or serving as an i ...

Michael Shipman: Keyboard having illuminated keys. Drummond & Duckworth, April 17, 2001: US06217183 (199 worldwide citation)

A keyboard is provided having illuminating keys. The keyboard includes a light channeling membrane and key members constructed at least partially of translucent material so that light produced from a light source is channeled upwardly to the upper surfaces of the key members. The light source may in ...

Blaine G Lowthorp: Tactile touch switch panel. Sheldahl, Orrin M Haugen, Thomas J Nikolai, November 28, 1978: US04127752 (193 worldwide citation)

A touch panel diaphragm-type switch array providing improved tactile feedback. A rigid substrate having a printed circuit conductor pattern thereon, with the pattern defining a plurality of switch locations, each including first and second separate electrical contacts is provided and superimposed th ...

Shin Ojima: Miniaturized calculator keyboard switch assembly having universally pivoted key actuators. Hoshidenkoseizo Kabushiki Kaisha, Pollock Vande Sande & Priddy, June 14, 1977: US04029915 (186 worldwide citation)

A portable electronic calculator comprises a calculator body which supports a keyboard consisting of a single elongated row of keys each of which is adapted to be tilted in any one of four directions by the finger tip of a user to input a selected one of four different information signals from said ...

Everett M Carter, Wilbur C Quain: Pressure sensitive matrix switch having apertured spacer with flexible double sided adhesive intermediate and channels optionally interposed between apertures. Lake Center, Kinzer Plyer Dorn & McEachran, December 27, 1977: US04065649 (129 worldwide citation)

This is concerned with a switch device which is quite thin and can be used on either a flat or a contoured surface that includes a backing member which may be dimensionally stable, either as a flexible or a stiff membrane, with a flexible membrane spaced therefrom by a flexible filled adhesive mater ...


Lynn William J, Seeger Richard E: Keyboard switch assembly with dome shaped actuator having associated underlying contactor means. Chomerics, Dike Bronstein Roberts Cushman & Pfund, January 14, 1975: US3860771 (122 worldwide citation)

A keyboard device utilizing a conductive plastic material layer which contacts circuit elements or pathways, the improvement of snapable plastic means raised on a pedestal through which it snaps through center to provide a feel of completion of circuit contact to the user.

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 ...

Sudduth William B: Keyboard, digital coding, switch for digital logic, and low power detector switches. Flex Key Corporation, October 17, 1972: US3699294 (117 worldwide citation)

Electric switches are described in which a resilient, electrically conductive, elastomeric member is spaced adjacent but apart from contact means; among features are the elastomeric connector: of sheet form; on metal contacts as a movable contact bridge; defining a simple and durable multiple switch ...