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Class Information
Number: 318/791
Name: Electricity: motive power systems > Induction motor systems > Primary circuit control > Starting control > Operating from a single phase source > Start winding removed during running operation > By thermal switch
Description: Subject matter wherein a heat responsive switch means is provided for de-energizing the start winding.

Sub-classes under this class:

Class Number Class Name Patents
318/792 With variable temperature coefficient impedance element 15

Patents under this class:

Patent Number Title Of Patent Date Issued
7782008 Motor and method for controlling operation of motor Aug. 24, 2010
7471058 Starting device and starting method for a single-phase induction motor Dec. 30, 2008
7402976 Apparatus and method for controlling operation of compressor Jul. 22, 2008
7071649 Active temperature estimation for electric machines Jul. 4, 2006
7061204 Motor starter device having reduced power consumption Jun. 13, 2006
6356047 Starting device for electric motors, which includes a PTC resistor and a relay in series Mar. 12, 2002
6249104 Cutout start switch heating Jun. 19, 2001
6097275 Motor starting and protecting apparatus Aug. 1, 2000
5539295 Device for indicating the state of a single-phase asynchronous motor Jul. 23, 1996
5291085 Split-phase starter for an electric motor Mar. 1, 1994
4820964 Solid state motor start circuit Apr. 11, 1989
4689508 Switched shaded-pole type induction motor Aug. 25, 1987
RE31367 Motor starting and protecting apparatus Aug. 30, 1983
4325012 Start winding cut-out circuit for an electric motor Apr. 13, 1982
4164000 Relay-starter electrical device for a prime mover Aug. 7, 1979
4042860 Combination starter-protector device Aug. 16, 1977

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