Abstract: A method and apparatus for providing output indications in response to the presence of an electromagnetic energy receptor within a predetermined distance of a glow discharge device the electrodes of which have a voltage applied thereacross at least equal to the maintaining voltage but less than the breakdown voltage, including an excitor for generating an electromagnetic field around the glow discharge device at a strength less than the ionization level but sufficient to ionize the gas when the electromagnetic energy receptor is within the predetermined distance of the glow discharge device.

Abstract: Apparatus for producing resistors wherein substantially round heads are heat-formed on the ends of the leads and molded, under a predetermined pressure, into electrical and mechanical contact with a quantity of resistive material to form an integral body.