Alan C Yoder

US Patent:

40456366, Aug 30, 1977

Filed:

Jan 28, 1976

Appl. No.:

5/653226

Inventors:

Alan C. Yoder - Fort Wayne IN
John E. Weber - Fort Wayne IN

Assignee:

Bowmar Instrument Corporation - Fort Wayne IN

International Classification:

H01H 900
H05K 100

US Classification:

200292

Abstract:

A printed wiring board for a keyboard switch assembly for electronic apparatus, such as electronic calculators, comprising a self-supporting insulative board having a plurality of elongated connectors on one surface thereof, at least some of the conductors having terminal portions for cooperating with switch elements. A layer of insulating material covers the one surface of the board and the conductors excluding the terminal portions. Each of the terminal portions has a coating of conductive ink thereon and a jumper element also formed of conductive ink is coated on the insulating layer crossing at least one of the conductors embedded therein and joining at least two of the terminal portion coatings. The conductive ink is preferably a noble-metal filled resin compound, such as silver epoxy, screen printed onto the insulating layer and terminal portions.

US Patent:

RE309230, May 4, 1982

Filed:

Nov 13, 1979

Appl. No.:

6/093686

Inventors:

Gilbert H. Durkee - Fort Wayne IN
Per G. Wareberg - Ottawa, CA
Alan C. Yoder - Fort Wayne IN

Assignee:

Bowmar Instrument Corporation - Fort Wayne IN

International Classification:

H01H 1370

US Classification:

200 5A

Abstract:

A keyboard switch assembly including a printed circuit board having four switch terminals on one side of the board, three of the terminals being arranged in a triangle and the fourth disposed within the triangle. Conductors on the one side of the board are respectively joined to the interior terminal and at least one of the three terminals. A conductive, generally triangular, snap-acting dome switch member is provided having arcuate apices, projections being respectively formed from the apices and respectively engaging the three terminals thereby spacing the periphery of the switch element from the one surface of the printed circuit board and the conductors thereon, at least the conductor connected to the interior terminal extending under the dome. The switch element has a fourth projection formed from the interior of the dome adjacent the center thereof which is in registry with the interior terminal and engages that terminal when the dome is deflected thereby completing an electrical circuit between the three terminals and the interior terminal. A layer of insulating material covers the conductors exclusive of the terminals.

US Patent:

RE294403, Oct 11, 1977

Filed:

Mar 9, 1976

Appl. No.:

5/665325

Inventors:

Gilbert H. Durkee - Fort Wayne IN
Per G. Wareberg - Ottawa, CA
Alan C. Yoder - Fort Wayne IN

Assignee:

Bowmar Instrument Corporation - Fort Wayne IN

International Classification:

H01H 1370

US Classification:

200 5A

Abstract:

A keyboard switch assembly including a printed circuit board having four switch terminals on one side of the board, three of the terminals being arranged in a triangle and the fourth disposed within the triangle. Conductors on the one side of the board are respectively joined to the interior terminal and at least one of the three terminals. A conductive, generally triangular, snap-acting dome switch member is provided having arcuate apices, projections being respectively formed from the apices and respectively engaging the three terminals thereby spacing the periphery of the switch element from the one surface of the printed circuit board and the conductors thereon, at least the conductor connected to the interior terminal extending under the dome. The switch element has a fourth projection formed from the interior of the dome adjacent the center thereof which is in registry with the interior terminal and engages that terminal when the dome is deflected thereby completing an electrical circuit between the three terminals and the interior terminal. A layer of insulating material covers the conductors exclusive of the terminals.

US Patent:

39419649, Mar 2, 1976

Filed:

Dec 9, 1974

Appl. No.:

5/530744

Inventors:

Alan C. Yoder - Fort Wayne IN

Assignee:

Bowmar Instrument Corporation - Fort Wayne IN

International Classification:

H01H 312

US Classification:

200159A

Abstract:

A push-button type switch device for use in generating binary coded signals. An insulative board is provided having flat opposite surfaces. An overcenter, snap-acting diaphragm switch element is provided movable between a first inactive position and a second overcenter operative position in response to application of a predetermined operating force thereon, as by depression of a push button. The diaphragm element has a centrally disposed common contact area and a plurality of radially spaced leg members extending outwardly therefrom. The leg members have outer ends which respectively engage first terminal pads on one surface of the board thereby normally supporting the diaphragm element thereon in its first position. A common terminal is provided on the one side of the board and has an external conductor connected thereto, the common terminal being in registry with the common contact area of the diaphragm element and spaced therefrom in the first position. The common contact area engages the common terminal in the second position of the diaphragm element.