Thomas Wayne Vaughn

US Patent:

52743489, Dec 28, 1993

Filed:

Feb 19, 1992

Appl. No.:

7/837798

Inventors:

Richard A. Vernier - Princeton IN
Thomas H. Vaughn - Evansville IN

Assignee:

Potter & Brumfield, Inc. - Princeton IN

International Classification:

H01H 5122

US Classification:

335 78

Abstract:

An electromagnetic relay to be used in applications such as DC motor reversing. The relay consists of two electromagnetic devices in a single enclosure with contacts configured in a so-called "H-bridge" circuit. Each of the devices has a movable contact element, while both devices have a common pair of normally closed and normally open stationary contact elements. Both electromagnetic devices have coil bobbins which are preferably identical in shape and are locked together by means of the common stationary contact elements without a need of additional fastening means. In this manner, the number of parts is minimized and the amount of adjustment required is reduced.

US Patent:

61539902, Nov 28, 2000

Filed:

Feb 27, 1997

Appl. No.:

8/807309

Inventors:

Paul Gregory Feil - Evansville IN
Thomas Henry Vaughn - Springfield IL

Assignee:

Siemens Electromechnical Components, Inc. - Iselin NJ

International Classification:

H02P 140

US Classification:

318280

Abstract:

A relay circuit is provided for operating a bi-directional dc motor including an H-bridge relay circuit having a first and a second relay. The first relay is capable of operatively engaging a first contact at a first time period to provide a first connection of the motor to a power source to operate the motor in a first mode. The second relay is capable of operatively engaging a second contact at a second time period to provide a second connection of the motor to the power source to operate the motor in a second mode. The relay circuit further includes a switch having at least one contact operatively engaging the first or second relay for effectuating the first or second connection, respectively. A third relay is operatively associated with the switch to provide a third connection of the motor to the power source as the at least one contact operatively engages the first or second relay. The third connection is disconnected prior to disconnection of the first or second connection as the at least one contact disengages the first or second relay.