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Class Information
Number: 200/300
Name: Electricity: circuit makers and breakers > Electric switch details > Cases and bases > Frangible element
Description: Subject matter, wherein the housing includes a portion which can be readily shattered, cut or destroyed (e.g., fire box cover of glass).

Patents under this class:

Patent Number Title Of Patent Date Issued
8084699 Vehicle switch Dec. 27, 2011
7790995 Break away base for electrical device Sep. 7, 2010
7609137 Electrical switchgear Oct. 27, 2009
7397012 High current switch and method of operation Jul. 8, 2008
7223927 Lockable switch mechanism May. 29, 2007
7119295 Suspended control device Oct. 10, 2006
7045730 Tamper resistance apparatus for an electrical device and an electrical device including the apparatus May. 16, 2006
7009123 Breaking detector for shear pin Mar. 7, 2006
6838628 Timer Jan. 4, 2005
6710269 Foil keyboard with security system Mar. 23, 2004
6696769 Mode switch assembly of automobile having impact/load absorbing apparatus Feb. 24, 2004
6674032 Manual call point Jan. 6, 2004
6525282 Pendant switch assembly for controlling a movable hoist Feb. 25, 2003
6209845 Keyboard interface Apr. 3, 2001
5967444 Emergency hammer for breaking panes of glass Oct. 19, 1999
5880535 Tap resistant security circuit Mar. 9, 1999
5578996 Long life detector Nov. 26, 1996
5359168 Switching and control mechanisms Oct. 25, 1994
5272292 Irreversible arrangement for interrupting the functioning of an apparatus controlled by an electronic system Dec. 21, 1993
4857679 Alarm system Aug. 15, 1989
4812604 Torsion spring contact switch Mar. 14, 1989
4737608 Convertible rotary switch Apr. 12, 1988
4554424 Electrical switch Nov. 19, 1985
4302637 Hermetically sealed switch assembly Nov. 24, 1981
4262469 Apparatus for closing boxes Apr. 21, 1981
4230918 Vehicle window glass breakage detector Oct. 28, 1980
4229633 Programmable switch Oct. 21, 1980
4062469 Electronic instrument case Dec. 13, 1977
3936621 Destructible type switch having frangible conductive element Feb. 3, 1976

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