Appeal No. 1997-3253
Application 08/357,196
rotor, at least two motor windings and a device for providing
protection against overcurrent in the motor windings
comprising thermistors having a positive temperature
coefficient. In accordance with a distinctive feature of the
protective device, Sobiepanek teaches that the device
comprises at least two parallel thermistors each mounted in
series with at least one motor winding. Thus, in the event of
stoppage of the motor, the thermistor associated with the
continuously excited winding undergoes a temperature rise.
When the cause of the stoppage has been removed, the winding
whose thermistor is not heated up is supplied at a normal
voltage, thus permitting restarting of the motor.
In column 2, lines 20-44, Sobiepanek teaches that Fig. 1
shows a schematic representing an electric motor equipped with
two thermistors 17 and 18, which are connected in series with
two motor windings 1 and 2. In column 2, lines 45-50,
Sobiepanek teaches that the operation device is such that when
there is a moment of accidental stoppage of motor winding 1,
then thermistor 17 undergoes a temperature rise while
thermistor 18, which is located in the circuit of the
unexcited motor winding 2, remains at its normal operating
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