Abstract: A grip heater has a tubular insulator that is designed to slip over a handlebar and has two interposed pairs of helical recesses. Each pair of helical recesses is formed by two parallel helical grooves and accommodates a heating element; the heating elements can have different resistances to provide differing degrees of heat when selectively connected to a voltage source. Preferably, the pairs of recesses overlap such that the heating elements reside in alternating grooves and cross over each other. The heating elements can be connected to a common ground to allow replacement of existing three-wire grip heaters. When a common ground is employed, the heating elements are preferably isolated where they cross.

Abstract: A heated handgrip is disclosed wherein a tubular sleeve is overlayed by a sheath with a heating wire sandwiched between the sleeve and the sheath.The sheath and the sleeve are connected threadedly and lock means are provided to preclude relative motion between the sheath and the sleeve.

Abstract: A heated hand grip is disclosed having an internal sleeve and an external protective jacket where the sleeve is formed with external, helical lands and grooves about which a strand of resistance wire is sewed and anchored snugly. The disclosure includes a method of manufacturing the heated hand grip.

Abstract: An improved defogging and deicing shield structure suitable for use as a face shield in combination with a protective helmet or for use in goggles having at least two spaced coextensive lenses. The inner surface of one lens is imprinted with an electrical circuit in a predetermined pattern. The resistance of the circuit being sufficient to generate heat effective to defog or deice the exterior surface of the other lens when the circuit is connected to a direct current power source.

Abstract: Electrically heated hand grips for the handle bars of vehicles such as motorcycles and the like are fabricated with an inner cylindrical sleeve member molded of synthetic plastic material. An electrical resistance heater wire coil is embedded in each sleeve. The inner surface of said the sleeve includes a plurality of circumferentially spaced and axially extending ribs, and the outer surface of said the sleeve includes a longitudinally extending land and groove pattern. The spaces between the ribs on the inner surface and the grooves on the outer surface of the sleeve have radially coextensive, overlapping circumferential portions where the sleeve is of minimum wall thickness. The resistance wire coil is disposed within said the sleeve member such that it is spaced a substantial distance from the inner surface of the ribs and the outer surface of the lands. The diameter of the heater wire is not less than the minimum wall thickness of the sleeve.