KAREN M LITWIN
Engineering in South Kingstown, RI
License number
Massachusetts 1905801
Issued Date
Apr 15, 2000
Type
Engineer in Training
Address
Address
South Kingstown, RI 02874
Professional information
Aircraft Circuit Breaker With Manual Opening Resistant Feature
US Patent:
6710695, Mar 23, 2004
Filed:
Oct 24, 2002
Appl. No.:
10/279638
Inventors:
Christian V. Pellon - Norton MA
Karen M. Litwin - Saunderstown RI
Roland G. Morin - Cumberland RI
Peter G. Berg - North Attleboro MA
Karen M. Litwin - Saunderstown RI
Roland G. Morin - Cumberland RI
Peter G. Berg - North Attleboro MA
Assignee:
Texas Instruments Incorporated - Dallas TX
International Classification:
H01H 7158
US Classification:
337 66, 337 72, 337348, 337358, 200 4313, 200 4318, 200 5009
Abstract:
A pushbutton resettable circuit breaker is shown having features to prevent manual opening by simply pulling outwardly on the pushbutton. In one embodiment, the pushbutton ( ) is formed with slots ( ) which are configured to provide a reaction surface essentially inaccessible without a special purpose contact opening tool ( ). The tool is provided with portions that are insertable into the slots and into engagement with the reaction surfaces for pulling the pushbutton out and manually opening the contacts. In a second embodiment, a small aperture is formed through the rating tab and top and wall of the button and in alignment with a movable plunger ( ). A special purpose contact opening tool ( ) can be inserted through the aperture to apply a force to the plunger and mechanically trip the circuit breaker.