Abstract: A rotary electrical switch is provided of the type that includes a stator body of substantially cylindrical shape having a cylindrical opening coaxially disposed therein. The stator body includes a plurality of electrical contacts embedded in the stator body at circumferentially spaced positions therearound and extending radially inward from the cylindrical opening in the stator body and having a pair of parallel disposed planar contact surfaces, all of the contacts being disposed in a common plane orthogonal to the longitudinal axis of the cylindrical opening. A rotor body is rotatably disposed in the cylindrical opening and a contactor clip including a pair of contactors electrically and resiliently engaging both planar contact surfaces of respective ones of the contacts is constrained to rotate with the rotor body.

Abstract: A digitally coded electrical supply system is provided for the selective control, through a plurality of code transmission conductors, of electrical power through a single power bus to a large plurality of electrical loads. The system includes a number generator for sequentially and cyclically producing digitally coded numbers into a plurality of code transmission conductors, a plurality of load decoders, a plurality of power switches, a power bus and a plurality of electrical loads. The system also includes a plurality of switch decoders, and a plurality of electrical switches, each switch connecting one of the switch decoders to one of the load decoders through a common activator conductor. In operation, the closing of any of the electrical switches is effective, in cooperation with the connected one of the switch decoders and the common activator cable, to activate an associated one of the load decoders and to supply electrical power to the associated one of the electrical loads.

Abstract: A variable resistance control has a resistance element, a collector, and a low noise contactor wipably engaging the resistance element and the collector. The contactor is provided with a pair of arms and a plurality of fingers extend outwardly from each of the arms. A contact extends from each of the fingers and wipably engages the resistance element. The contacts on one of the arms are spaced apart lengthwise of the resistance element from the contacts on the other arm for reducing contact noise.

Abstract: An acoustic transducer having a piezoelectric element secured to a conical diaphragm with the piezoelectric element forming part of a relaxation oscillator circuit. The piezoelectric element performs the dual function of firstly developing acoustic energy and transferring such energy to the diaphragm and secondly functioning as an electronic component in the oscillator circuit by operating as a frequency determining capacitor in such circuit. The diaphragm and the piezoelectric element are enclosed in a housing. Portions of the housing are deformed and penetrate the base of the diaphragm for securing the diaphragm to the housing. A post integral with the housing extends inwardly from the base toward the apex of the diaphragm and one end of the post is disposed adjacent the apex to prevent collapse of the diaphragm.

Abstract: An electrical control is provided with an insulated shaft extension. The insulated shaft extension is attached to a metal shaft rotatably supported in a bushing attached to the housing of the control. A hollow shaft portion of the insulated shaft extension is in concentric relationship with the metal shaft. Tabs are sheared from the hollow shaft portion to abut against a shoulder defined by a reduced diameter portion on the metal shaft. The metal shaft has a flat which mates with a flat formed in the hollow shaft portion to prevent relative rotation of the shafts. Deformable ribs extend along the flat in the hollow shaft portion to ensure engagement with the flat on the metal shaft.

Abstract: A variable resistance control of the rectilinear and multiturn type is provided with a contactor having a plurality of contactor paddles. The contactor paddles are wedge-shaped, are defined by a saw-tooth shaped shear line in a planar portion of the contactor, and are bent upwardly to provide flexing clearance between adjacent contactor paddles.

Abstract: A variable resistance control comprises a resilient nonconductive annular skirt sandwiched between a pair of substrates. The skirt has an arcuate section and a pair of posts interconnected by a bridge section. Each of the substrates comprises a circular portion carrying a resistance film and an extending portion provided with apertures and engaged by the posts. A driver is rotatably carried by the control and contactors are constrained to rotate with the driver wipingly engaging the resistance films. The apertures in the extending portions of the substrates are in line with the posts and the periphery of the bridge section substantially coincides with edges of the extending portions. Terminals are secured to the extending portions of the substrates and comprise a head and a tail. The head is received in an aperture and a pair of spaced fingers integral with the terminal are clinched into engagement with the head disposed between the spaced fingers.

Abstract: A rotary electrical switch is provided of the type that includes a stator body of substantially cylindrical shape having a cylindrical opening coaxially disposed therein. The stator body includes a plurality of electrical contacts embedded in the stator body at circumferentially spaced positions therearound and extending radially inward from the cylindrical opening in the stator body and having a pair of parallel disposed planar contact surfaces, all of the contacts being disposed in a common plane orthogonal to the longitudinal axis of the cylindrical opening. A rotor body is rotatably disposed in the cylindrical opening and a contactor clip including a pair of contactors electrically and resiliently engaging both planar contact surfaces of respective ones of the contacts is constrained to rotate with the rotor body.