Chomerics, Inc.

Richard E Seeger, Jr

Vincent Squitieri

William J Lynn

Charles H Kuist

John Price

James N White

Keyboard having contactors and contacts which are selectively urged against one another by depression causing engagement of one by the other, the keyboard having at least contactors or contacts or both which are constructed of a conductive polymeric composition such that upon engagement of a contactor with a contact there is exhibited substantially reduced bounce after repeated closure of contactor against contact even at micro ampere current levels.

Keyboard

Keyboard device having a top flexible plastic contactor sheet with a first circuit pattern thereon, said first pattern comprising contactors and circuit lines, a bottom sheet having a second circuit pattern comprising contacts and circuit lines, an insulator spacer having openings in register with said contactors, said sheet having formed therein one or a plurality of protrusions or domes which support a portion of the first circuit pattern, and means for continuously urging the one or plurality of protrusions or domes supporting a portion of said first circuit pattern against a portion of said second circuit pattern.

Keyboard with concave and convex domes

A circuit board or sheet of homogeneous material having one or more circuit elements adhering to a surface thereof, said sheet providing a low through resistance path between each circuit element and opposed and aligned contacts positioned in surface contact with the opposite side of the sheet while providing a high isolation resistance between out of alignment contacts positioned on the opposite side of the sheet and between contacts positioned on the same side of the sheet positioned an isolation distance from said circuit elements. The circuit board with a circuit pattern is shown in various applications, such as keyboard or watch.

Isolated path coupling system

Keyboards having flexible plastic domes which snap when depressed to provide tactile feel, at least some of said domes formed from a sheet of plastic and having a bar shaped concave snap initiator formed in said dome, and an actuator comprising at least one cross bar for engaging the snap initiator to initiate dome depression in situations in which the actuator used to depress the dome does not effectively produce snapping of the conventional dome because of the shape of the actuator.

Keyboard switch assembly having flexible contact layer with snap

Keyboard construction using a sheet of flexible and resilient non-conductive material preferably non-conductive plastic which is preformed in a predetermined manner for supporting both contact means and contactor means and which is adapted to be folded so that the contact and contactor means are positionable in spaced apart alignment whereby upon depression electrical contact may be made between said contact means and said contactor means.

Keyboard switch assembly having foldable printed circuit board, integral

An electrical connector in sheet form or the like which has a low through resistance in a volume between opposing surface contacts on opposite sides or surfaces of the sheet and provides a substantially higher isolation resistance in all volumes thereof between a contact on the surface of the sheet which is at a distance greater than the thickness of the sheet from any of the first of the above mentioned contacts.

Isolated paths connector

Sealed keyboard sandwich having actuator means, a plurality of contactor means, a plurality of contact means and support means therefore, said contacts and contactors forming a plurality of key units, and gas passage means positioned between said actuator means and said support means for selectively permitting the flow of trapped gas from the key units upon depression of a portion thereof. In the preferred structure the sandwich is hermetically sealed from the outside atmosphere.

Keyboard switch assembly having internal gas passages preformed in

Keyboard for a calculator or a combined calculator and watch or similar

A keyboard device which includes a frame having a plurality of bores in which there is positioned a core for slideable motion therein, and a keyboard top positioned over the bores and preferably sealing each of the cores within the bores of the frame so that no particles of food or dust can accumulate between the cores and the frame while still permitting the cores to be depressed to cause a contactor means to engage contact means. In the preferred embodiment the cores are loose within the bores and are held therein from the top by said keyboard top. In addition, a mask to simulate the appearance of a frame about the portions of the top is provided. In addition, the preferred embodiment is sealed on the top and bottom to protect the in words from the environment.

Growing community of inventors

Topsfield, MA, United States of America

Richard E Seeger, Jr