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Class 318/791 - By thermal switch


Subclass of Class 318 - Electricity: motive power systems
Definition: Subject matter wherein a heat responsive switch means is
No. of patents: 15
Last issue date: 12/30/2008


NumberTitleIssue Date
7471058Starting device and starting method for a single-phase induction motor
A starting device and starting method for a single-phase induction motor, housing: a stator having a running coil and a starting coil; a running switch and a starting switch which is conducted to an open condition upon completion of the motor start. The starting dev...
12/30/2008
7402976Apparatus and method for controlling operation of compressor
An apparatus for controlling an operation of a compressor includes a controller for generating a control signal for selecting an operation mode of a compressor according to an operation load of the compressor; a first switching unit connected to a motor consisting o...
07/22/2008
7265515Starter for a line start electric motor
The invention concerns a starter for a line start electric motor having at least one main winding (4) and at least one start winding (12) and which start winding is connected in series with a run capacitor (14) with which a start capacitor (1...
09/04/2007
7071649Active temperature estimation for electric machines
A method and system for estimating a temperature of an electric machine comprising obtaining a temperature value responsive to a temperature signal from a temperature sensor, the temperature sensor is operatively connected to and transmitting the temperature signal ...
07/04/2006
7061204Motor starter device having reduced power consumption
A motor starter for use with a motor (20) having a main winding (M) and a start winding (S). The starter has a PTC thermistor (30) connected in series with the start winding (S). A triac (40) is connected between PTC thermistor (30) and a...
06/13/2006
6356047Starting device for electric motors, which includes a PTC resistor and a relay in series
A starting device for electric motors which is designed to be fitted to compressor motors or the like, and includes a PTC resistor in series with a relay inserted between the line and the motor start winding....
03/12/2002
6249104Cutout start switch heating
A motor start switch includes a temperature responsive resistor element and a cutout switch electrically connected in series with a start winding of an electric motor. The cutout switch is in thermal contact with the temperature responsive resistor elemen...
06/19/2001
6097275Motor starting and protecting apparatus
A motor starting device (1) has a thermostatic element (14) of a first switch circuit (11), a first resistive heater (13) serially connected to the first switch circuit, a thermostatic element (22) of a second switch circuit (21) and a second resistive he...
08/01/2000
5539295Device for indicating the state of a single-phase asynchronous motor
Device for indicating the state of a single-phase asynchronous motor (MO) with a phase-shift capacitor, including an automatic stop switch (FC1, FC2) on each live conductor and a thermal switch (TH) on the return conductor, and the direction of rotation o...
07/23/1996
5291085Split-phase starter for an electric motor
A split-phase starter for an electric motor having a casing made up of a casing body and a lid secured to the casing body, the casing body having a first casing and a second casing, a relay contact mechanism being arranged in the casing body, and a positi...
03/01/1994
4820964Solid state motor start circuit
A start circuit for a single phase AC induction motor employs an impedance in series with the run winding to develop a voltage drop proportional to the current through the run winding, and a pair of LEDs or another light emitting device across this impeda...
04/11/1989
4689508Switched shaded-pole type induction motor
A shaded pole induction motor includes a plurality of series-connected running windings and a plurality of series-connected shaded pole coils (windings). A normally closed, centrifugal-force-responsive switch is provided in series with the shaded pole coi...
08/25/1987
4325012Start winding cut-out circuit for an electric motor
This disclosure deals with a time delay cut-out circuit for the start winding of an AC electric motor. The circuit includes an electronic switch which is connected in series with the start winding and which may be selectively closed to energize the start ...
04/13/1982
4164000Relay-starter electrical device for a prime mover
A combination relay-starter electrical device is adapted for connection in circuit relation with a winding circuit of a prime mover. The electrical device has a pair of terminal means adapted for the connection in the circuit relation with the prime mover...
08/07/1979
4042860Combination starter-protector device
A combination starter-protector device for a winding circuit of a dynamoelectric machine. The device has a housing with at least one terminal therein adapted for connection with a power source, and means is provided in the housing for controlling starting...
08/16/1977
 
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