Other

Voltec Incorporated

Creek Electronics, Inc.

Hugh G Johnson

Burton C Trattner

Electrical grounding accessory

A wafer-like body of electrical insulating material having three prong-receiving apertures therethrough configured and disposed to receive the two power line prongs and the ground prong of a standard three-prong electrical plug. Embedded within the wafer-like body is a contact device of resilient electrically conductive material, part of which is exposed in the ground prong aperture so as to yieldably interfere with the ground prong and make sustained electrical contact therewith when the prongs of the plug, which are insulated from one another, are passed through their respective receiving apertures enroute to being inserted into corresponding sockets of a grounded power outlet. A connection can thereby be made from the outlet ground to the contact device via the ground prong of the plug. A first length portion of a wire lead is embedded in the wafer-like body and is electrically connected to the contact device, while the remaining length portion extends away from the body for grounding a remote component not otherwise grounded by the plug. The contact device may have several forms, including a bifurcated device whose legs traverse the ground prong aperture and are urged further apart by the entering ground prong, a sheet metal device having a hole, such as a circular hole, defined by ground prong engaging tips of spring fingers radiating outwardly from the hole circumference, and an electrically conductive elastomer device having a cruciform slitted portion or pilot hole in the path of the ground prong.

A unitary portable flashlight assembly incorporating a hand operated generator and rechargeable batteries, such as the pressure vented nickel-cadmium type with welded electrodes. The generator is designed and operated to charge th batteries at a high rate for a short time to provide extended operation of the load during a later discharging mode. The batteries also serve to regulate the voltage during the charging mode thus protecting the load if it be connected during the charging period. The battery assembly can provide the necessary energy to operate such devices as radio receivers and transmitters, electric fire starters, etc., as well as providing a mechanical output.

Self-contained hand held portable lantern-flashlight consisting of a

The location of a thermal transmition zone in a water storage tank is detected by a number of temperature responsive electrical elements arranged on the exterior surface tank, out of contact with the water, and at selected locations thereon corresponding to thermal transition zone levels within the tank; visual indicating means are connected to the sensing element and are in an arrangement to correspond to the location of the elements on the tank such that, upon the temperature sensing elements detecting the location of the thermal zone, a corresponding visual indication is provided.

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Laurel Hollow, NY, United States of America

Hugh G Johnson