US Patent No: 4,804,933

Number of patents in Portfolio can not be more than 2000

Automatic transfer switch

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Importance

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Abstract

An automatic electric load transfer switch incorporates an over-the-center spring mechanism to operate switch contacts. The spring mechanism has a first position at which the electric load is connected to one electricity source and a second position at which the load is connected to another electricity source. The spring mechanism is driven by a solenoid activated cam shaft. An apparatus is provided for halting the movement of the spring mechanism at a position intermediate the first and second positions at which the load is not connected to either electricity source. The halting apparatus is releasable so that the spring mechanism can continue its movement between the first and second positions.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
BROWN INDUSTRIAL GAS, INC.KOHLER, WI2

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Becker, James A Grafton, WI 13 140
Freitag, Lawrence F Bayside, WI 2 32
Kussy, Frank W Randallstown, MD 8 89

Cited Art

Patent Info (Count) # Cites Year
 
AUTOMATIC SWITCH COMPANY (3)
4,405,867 System for transferring a load between two power sources without interruption of power to the load 38 1980
4,388,535 Electric power interrupting switch 10 1981
4,430,579 Electrically operated, mechanically held electrical switching device 16 1982
 
WESTINGHOUSE ELECTRIC CORP. (2)
4,295,053 Electric control system with mechanical interlock 17 1979
4,295,054 Electric control system with rotary mechanical interlock and timing mechanism 13 1979
 
ELECTRO SWITCH CORP. (1)
4,255,733 Latching switch relay 4 1978
 
ONAN CORPORATION (1)
4,423,336 Electromechanically controlled automatic transfer switch and bypass switch assembly 44 1982

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
EATON CORPORATION (3)
6,590,481 Fast acting, electrically powered operator for transfer switch and transfer switch incorporating same 14 2000
6,577,216 Fast acting transfer switch with confronting power switches oppositely actuated by single coil solenoid 9 2001
8,138,861 Inertial catch for an automatic transfer switch power contractor 0 2009
 
GENERAL ELECTRIC COMPANY (3)
6,849,811 Methods and apparatus for transfer switch 5 2000
6,876,103 Automatic transfer switch systems and controllers 15 2000
6,693,248 Methods and apparatus for transferring electrical power 9 2002
 
FUJI ELECTRIC FA COMPONENTS & SYSTEMS CO., LTD. (1)
6,642,820 Protective switch 3 2002
 
GENERAC POWER SYSTEMS, INC. (1)
6,172,432 Automatic transfer switch 70 1999
 
KOHLER CO. (1)
5,093,988 Method for attaching a flexible connector 7 1991
 
QAXU TECHNOLOGY, INC. (BRAD PEDERSEN) (1)
6,825,578 State machine controlled automatic transfer switch system 13 2002
 
TORNATECH INC. (1)
5,576,604 Linear motor driven transfer switch assembly 9 1995