Abstract: An electrically powered resistance heating handgrip includes a control circuit located within a hollow core that fits coaxially within the open end of a handlebar of a motorcycle or snowmobile. The control circuit is mounted on a thin, narrow, elongated printed circuit board and includes a microprocessor that is programmed to contain a lookup table of temperatures. A thermistor provides feedback signals to the microprocessor which compares temperature sensor feedback signals to a target temperature. The target temperature is established by a dial. The dial operates the wiper of a variable potentiometer to establish the target temperature. Heat is uniformly distributed by wrapping the heating element wire thereof about a thermally conductive sheet of aluminum, and encasing the wire within a temperature resistant dielectric sheathing.

Abstract: An electrically powered resistance heating handgrip is provided for a vehicle that employs an electrical storage battery. A control circuit to regulate the amount of power provided to the resistance elements in the grip is provided and preferably located within a hollow core that fits coaxially within the open end of a handlebar of a motorcycle or snowmobile, for example. The control circuit is mounted on a thin, narrow, elongated printed circuit board and includes a microprocessor that is programmed to contain a lookup table of temperatures. A thermistor is embedded in the casing of the handgrip proximate the heating element thereof. The thermistor provides feedback signals to the microprocessor which compares the temperature sensor feedback signals to a target temperature and provides or interrupts electrical power to the electrical heating element depending upon whether the temperature indicated by the thermistor is lower than the target temperature.