U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 5377411

Hair Cutting Appliance

A haircutting appliance comprises an enclosed housing having a hollow handle connecting the housing to a vacuum source to carry away cut hairs from a subject's head.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 218/27 - Connected to contact


Subclass of Class 218 - High-voltage switches with arc preventing or extinguishing devices
Definition: Subject matter wherein the magnetic material is electrically
No. of patents: 16
Last issue date: 04/03/2007


NumberTitleIssue Date
7199318Air guidance device for cooling a switch part of an electrical switch
An air guidance device is for cooling a switch part of an electrical switch. It includes at least one air guidance element arranged at a distance from the switch part to be cooled, forming at least one air duct which runs vertically when the switch is in the install...
04/03/2007
7154061Interrupter assembly for a circuit breaker
A preferred embodiment of an interrupter assembly for a circuit breaker includes a first contact, a conductor, and a second contact mounted on the conductor. The second contact and the conductor are movable in relation to the first contact between a first position w...
12/26/2006
6103986Circuit breaker including bridging contact with magnetic structure
A U-shaped magnetic plate is positioned on the side of a movable contact shoe opposite to a fixed contact shoe, and the tips of the respective legs of the magnetic plate face via a gap the movable contact shoe in a closed condition of the movable contact ...
08/15/2000
5780800Circuit breaker contact arm and spring shield
An arc isolation shield for molded case circuit breakers is inserted between the circuit breaker case and cover and attached to one leg of the operating cradle. The knee of the circuit breaker moveable contact arm contacts the bottom of the shield and mov...
07/14/1998
5589672Circuit breaker with arc quenching device and vent
A circuit breaker is formed of a stationary contact member bent back into a U-shape and having a stationary contact at a bent back portion thereof, a moving contact member situated adjacent to the stationary contact member to be able to contact with the s...
12/31/1996
5569894Circuit breaker arc quenching device with venting structure including flapper valve
An arc quenching device for a circuit breaker having a stationary contact member and a moving contact member includes a magnetic element formed of an arc quenching core and a base plate. The arc quenching core includes a back wall, and two side walls exte...
10/29/1996
5517164Molded case circuit breaker having movable contact finger releasably locked to an operating mechanism
A subframe is coaxially pivotally mounted with a movable frame of the operating mechanism of a molded case circuit breaker and is locked to the frame by a bell crank pawl which is pivotally mounted on the subframe. A leaf spring assembly rigidly attached ...
05/14/1996
4463230Electric power circuit breaker
An electric power circuit breaker includes two switching elements which can move, relative to each other, in an extinguishing gas and which contain, in each case, at least one main current contact and at least one arcing contact. A cylindrical coil is con...
07/31/1984
4451718Circuit breaker
The present invention combines the provision of arc shields surrounding the contacts of a circuit breaker with a magnetic driving means to raise the arc voltage of an arc drawn across the contacts and to effectively drive the arc, whereby the performance ...
05/29/1984
4387281Arc blowing chamber
In a blowing chamber for the arcs appearing between the contacts of an electrical circuit breaking apparatus, e.g. a current limiting apparatus, a blowing loop is constituted by a conductor passing firstly parallel to a movable contact, then externally al...
06/07/1983
4302644Contact breaker with magnetic arc blowing
An electrical contact breaker has a stationary contact, and a movable contact. The movable contact is connected to a terminal by a flexible conductor. For blowing out the arc formed when the contacts separate under load, there is a blowing means including...
11/24/1981
4301340Electrical switchgear
A pair of switches are disposed adjacent one another in a housing which contains the highly insulating gas sulphur hexafluoride. In a closed position of each switch, a pivotable contact arm engages fixed contact fingers to permit the flow of load current ...
11/17/1981
4301341Electrical switchgear
On opening of a circuit breaker, an end portion of a pivotable contact arm disengages from fixed contacts such that an arc is drawn therebetween radially across the pole face of a field coil, the end portion of the contact arm moving transversely to the f...
11/17/1981
4158829Electromagnetically operated DC power contactor
An electromagnetically operated DC power contactor for high voltage and current use constructed to afford the required contact pressure at the arcing and main contacts with minimal magnet force together with the provision of contact wipe and shearing and ...
06/19/1979
4151391Contact arrangement for a pressurized gas circuit breaker
A contact arrangement for a pressurized-gas circuit braker, wherein the contact arrangement comprises a first tubular contact member and a second tubular contact member axially arranged therewith. The contact arrangement is further provided with a hollow ...
04/24/1979
4032736Gas-pressurized electrical switch with current-generated magnetic field for assisting arc extinction
A gas-pressurized electrical switch includes a casing provided with a transverse wall dividing the interior into two quenching chambers filled with a pressurized arc-quenching gas. A longitudinally movable contact member is supported within a first one of...
06/28/1977
 
Sign InRegister
Username  
Password   
forgot password?