Abstract: A contactless linear motion switch has a housing and a Hall effect sensing circuit positioned within the housing. A plunger carrying a permanent magnet moves within the housing toward and away from the Hall effect sensing circuit. A concentrator is positioned within the housing and has a portion positioned adjacent the Hall effect sensing circuit and a further portion positioned in contact with the permanent magnet when the magnet is positioned away from the Hall effect sensing circuit.

Abstract: A Hall effect rotary switch includes a frame and a parallel rotor and stator mounted in the frame. There are a plurality of peripherally unequally spaced Hall effect sensing circuits mounted on the stator and a plurality of localized magnetic areas on the rotor. Movement of the magnetic areas adjacent the Hall effect sensing circuits provides output signals therefrom, which signals are used to determine the relative position of the rotor and stator. The localized magnetic areas on the rotor cooperate with detent portions of the stator to form a magnetic detent.

Abstract: A Hall effect rotary switch includes a stator and a rotor. The stator mounts a row of spaced Hall effect sensing circuits. There are magnetic means for causing activation of the sensing circuits, with the rotor selectively positioning said magnetic means adjacent said Hall effect sensing circuits to provide coded outputs therefrom at different positions of the rotor.

Abstract: A rotary switch includes a stator, rotor and shaft for the rotor. The stator has a complex conductive matrix formed of criss-crossing conductive sections integrally joined together and integral with a central annular ring. The annular ring in turn has radially inwardly-extending switch sections. There is a non-conductive support member for the matrix, with the matrix and support member having respective and cooperating openings and projections for positioning the matrix on the support member. The rotor has a plurality of pockets with contact members positioned in at least one of the pockets and arranged for electrical contact with portions of said matrix.

Abstract: A means for decoding a generally constant frequency sine wave scrambled television signal uses an automatic gain control circuit in a closed loop. The scrambling, applied at the head end of the television system, applies a greater scrambling level to the audio carrier than it does to the video carrier. The unscrambling signal, the detected audio carrier scrambling signal, is combined with the scrambled signal in an amplifier circuit, the output of which is a basic television signal. There is a residual of the scrambling sine wave remaining in the audio carrier output after unscrambling, but little or no residual scrambling remaining on the video carrier. The residual audio carrier scrambling signal is detected and amplified for application as the unscrambling signal.

Abstract: A pushbutton switch has a base and a button telescopically movable on the base. There are a pair of terminals, with one of the terminals having a contact arm positioned within a switching chamber in the base. Movement of the button is effective to cause the contact arm to close upon the other terminal. The effective length of the contact arm is greater than its actual length. In one improvement, a light emitting device may be illuminated when the switch is operated. In another, a portion of the light emitting device forms the means to close the contact arm.

Abstract: An anti-static keylock assembly includes a keylock device having a rotatable locking element; an adapter formed of a plastic material interlocked with the keylock device; a terminal assembly formed of a plastic material interlocked with the adapter; and a rotor assembly formed of a plastic material positioned within the terminal assembly and having a shaft interlocked with the locking element of the keylock assembly. A plurality of terminals extends outwardly from the terminal assembly with one of the terminals being centrally located and rotatably supporting a rotor contact which is attached to the rotor assembly. The remaining terminals are circumferentially positioned about the center terminal. Rotation of the keylock assembly effects rotation of the rotor contact and thus changes the electrical connections between the terminals.

Abstract: A pushbutton switch has a button telescopically mounted on a switch base and a contact with a plurality of outwardly extending arms positioned between the button and the base. One group of arms is disposed for contact with the terminals within the base and another group of arms is positioned to receive the actuating force from the button. Illuminating means are positioned within the base and are disposed to direct light through an opening in the contact toward a light transmissive portion of the button.

Abstract: A TV tuner has a housing and a rotating channel selector shaft mounted on the housing. There are a plurality of individual support members positioned by and mounted on parallel flatted areas of the shaft, which flatted areas vary in size to assure correct placement of the support members. Individual coil strips, each carrying a tuning screw, are fixed to the shaft assembly. A simplified clutching arrangement for controlling adjustment of the screws utilizes a coil spring to provide the initial force for moving a pinion gear into operating engagement with the tuning screws. The tuning screws are held by resilient arms which bias the head of the screws toward the shaft to thus firmly maintain the screws in any adjusted position. Each of the coil strips have contacts extending outwardly from one side and positioned to be in electrical and mechanical contact with cantilever spring members fastened to a printed circuit board which in turn is held by the housing.

Abstract: A switching mechanism has at least two terminals partly positioned within a housing and a reciprocal actuator movable within the housing. A coil spring, under endwise buckling pressure, is mounted between spaced portions of one of the terminals, with movement of the actuator causing the coil spring to pivotally move toward and away from another terminal. A slider is positioned in one end of the coil spring and arranged for contact with the actuator to cause pivotal movement of the coil spring. The actuator and slider have cooperating means for latching the actuator in an operated position.

Abstract: A UHF tuner employing resonant cavities with tuned lines has a discrete air trimmer capacitor which includes a fixed electrode connected to the tunable line with one or more insulated turns of silver wire and a movable electrode guided into the fixed electrode to provide characteristics of lower minimum capacity, higher maximum to minimum capacity ratio, smaller physical size, higher Q and lower cost than conventional capacitor trimmers.

Abstract: A pushbutton switch mechanism includes a two-piece housing, a plurality of terminals positioned in the housing, a plurality of contact arms and a pivotally movable latch member within the housing. One of the housing sections has integrally molded pushbuttons mounted on integrally molded spring arms with the other housing section including integrally molded blockout members.

Abstract: A circuit for providing TV channel selection and tuning voltages utilizes a plurality of fixed resistors and a plurality of Q variable inductances. A channel selection switch connects particular resistors and Q variable inductances for channel selection and fine tuning. The Q variable inductances are used for fine tuning and are connected in circuit with an oscillator and a detector. The Q variable inductances each have an adjustable steel core with the position of the core determining the amplitude of the detected oscillator voltage and thus the fine tuning control voltage.

Abstract: A television tuner includes a rotatable turret and a plurality of coil forms positioned in the turret. There is a pair of tuning coils mounted on each coil form and an adjustable tuning screw extending outwardly from each end of each coil form. The housing mounting the rotatable turret includes means for adjusting the tuning screws at opposite ends of each coil form. The turret is detented within its housing such that there are twice as many detented positions of the turret as there are coil forms and such that at each detented position only one tuning screw can be adjusted.

Abstract: A system for conveying information from a plurality of subscribers to a central station includes a communications link between each subscriber and the central station. At each subscriber there are means for transmitting coded information and means for controlling the time of transmission so that each subscriber repetitively provides information to the central station. The central station includes storage means for comparing successive signals from each subscriber and means for comparing the stored signals to verify their authenticity.