Thomas J Leach

US Patent:

51209136, Jun 9, 1992

Filed:

Feb 25, 1991

Appl. No.:

7/661567

Inventors:

Thomas C. Leach - Cedar Rapids IA
James B. MacBeth - Danville IA

Assignee:

Square D Company - Palatine IL

International Classification:

H01H 920
H01H 3346

US Classification:

200 50AA

Abstract:

A circuit breaker drawout arrangement includes a drive mechanism for moving a circuit breaker along a pair of rails between a Connect and a Disconnect position by means of a drive tool. A torque limited clutch permits a lower maximum torque when moving the breaker to the Connect position and a greater maximum torque when moving from the Connect position to the Disconnect position. In one embodiment the clutch is formed by a pair of oppositely orientated unidirectional roller clutches in the drive nut and in another by a ball and detent arrangement in the drive nut.

US Patent:

50973827, Mar 17, 1992

Filed:

Feb 25, 1991

Appl. No.:

7/661024

Inventors:

Thomas C. Leach - Cedar Rapids IA
Marvin L. Linder - Hiawatha IA
Donald H. Haase - Cedar Rapids IA

Assignee:

Square D Company - Palatine IL

International Classification:

H02B 114

US Classification:

361345

Abstract:

A racking mechanism for a fused circuit breaker includes a drive assembly that is removable as a unit from the breaker and fuse truck. A modular assembly includes a drive unit having a drive shaft and a travelling nut and yoke for rotating a pair of levering arms for moving the breaker among a plurality of positions in a cubicle. All interlocks are included on the modular drive assembly. An indicator is cam operated by the travelling nut and includes a face having indicia that identifies the direction of rotation of the drive shaft.

US Patent:

54812356, Jan 2, 1996

Filed:

Mar 31, 1994

Appl. No.:

8/221424

Inventors:

James A. Heise - Cedar Rapids IA
Duane L. Turner - Cedar Rapids IA
Jeffrey M. Kaufman - Cedar Rapids IA
Thomas C. Leach - Lexington KY

Assignee:

Square D Company - Palatine IL

International Classification:

H01M 7300

US Classification:

335 18

Abstract:

A conducting spring is provided for exerting a biasing force against a test button to open a circuit interrupter test circuit. The spring includes a one-piece, elongated cantilever having a first and second end. The cantilever is formed from an electrically conducting material. One of the cantilever ends is adapted to directly secure to a first terminal of the test circuit. The other cantilever end is adapted to directly and reversibly contact a second terminal of the test circuit. The spring also includes means for resiliently flexing the second end of the cantilever in relation to the first end. The flexing means is integrally formed with the cantilever. Also provided is a ground fault circuit interrupter and a ground fault circuit module for protecting a circuit interrupter with a push-to-test feature.