Donald J Chambers

US Patent:

52606880, Nov 9, 1993

Filed:

Apr 6, 1992

Appl. No.:

7/864411

Inventors:

John R. Curry - El Segundo CA
Donald A. Chambers - Wilmington CA

International Classification:

G08B 108
B66C 1318

US Classification:

340539

Abstract:

Sensors mounted on respective cargo transport trucks transferring cargo to a hoisting crane and responsive to an unsafe condition in such trucks to generate an electrical safety signal to be transmitted to such crane for rendering the hoisting mechanism inoperative.

US Patent:

54283442, Jun 27, 1995

Filed:

Nov 8, 1993

Appl. No.:

8/148940

Inventors:

John R. Curry - El Segundo CA
Donald A. Chambers - Wilmington CA

International Classification:

G08B 108
B66C 1318

US Classification:

340539

Abstract:

A safety apparatus for use on a hoisting crane used to hoist cargo from cargo transport trucks that detects hoisting such trucks and renders the hoisting mechanism inoperative. The safety apparatus includes sensors responsive to an unsafe condition in such trucks to generate a safety signal. A transmitter responsive to the safety signal transmits an operational signal to the hoisting crane that upon receiving and recognizing the operational signal renders the hoisting mechanism inoperative and alerts the crane operator of the unsafe condition.

US Patent:

54275334, Jun 27, 1995

Filed:

Nov 2, 1993

Appl. No.:

8/146856

Inventors:

Donald M. Chambers - Whittier CA

Assignee:

Northrop Grumman Corporation - Los Angeles CA

International Classification:

H01R 909

US Classification:

439 62

Abstract:

An electrical connector for use in connecting one printed circuit board to another printed circuit board in which the electrical contacts of one board exert zero-force on the electrical contacts of the other board. The connector includes a housing of generally U-shaped configuration having a receptacle into which the contacts of one circuit board are inserted to make electrical contact with flexible contacts in the receptacle of the connector, the flexible contacts normally being farther apart than the entrance opening into the receptacle so that there is no force imposed on the contacts entering the receptacle. A spring driver in the receptacle forces the flexible contacts into firm electrical contact with the contacts entering the receptacle only after the latter has been fully inserted into the receptacle.