Abstract: A multipurpose tool holder with a frame and pivoting ring fitting over the arm has a first handle to grasp when only the forearm is inserted and a second handle to grasp when the full arm is inserted, the pivoting ring allowing bending of the elbow. A tube with a keyless chuck serves as the second handle and receives the end of a tool.

Abstract: A proximity device for use in determining a distance and an angular displacement between the proximity device and an object or nearest surface of an object whereby alignment can be implemented. The proximity device contains a transmitter section for transmitting signal energy, an energy source for outputting the signal energy, a dual-channel receiver section, a plurality of energy sensors for receiving signal energy reflected from an object or nearest surface of an object and a channel-control section. Within the dual-channel receiver section there are means for determining the relative distance and an angular displacement to the object or surface of the object from the reflected signal energy.

Abstract: A FM wireless headphone transmitter which uses a novel technique of varying the transmitted frequency. Instead of the traditional methods of using a variably meshing multi-plate capacitor, the invention uses a printed circuit inductance with a tuning plate attached permanently to the inside of the case so that frequencies are changes by changing cases. An alternative embodiment uses interchangeable tuning plates attached to the inside of the case by hook and loop pile type fastener material. The printed circuit inductance also serves as a transmitting antenna.