Abstract: High frequency reactors for interconnecting a high frequency electrical power source and a load which reactors include a pair of plates having opposite surfaces with a length and width and a thickness between the surfaces which is small relative to the length and width of the surfaces. The plates are disposed with opposing closely spaced surfaces insulated from each other, and each of the plates has longitudinally aligned first and second portions with one portion of one of the plates electrically insulated from another portion of the plates and conductively interconnected by a variable reactance with another portion of the plates.

Abstract: A pushbutton tuner wherein tuning coils are disposed in two decks, upper and lower, and the upper or lower tuning coils are disposed in front of the others. A printed circuit board to be connected to said tuning coils by lead wires is divided in two parts and each part is disposed close to the tuning coils in the associated deck.

Abstract: Precise capacitive coupling to a coil is provided by a coil form having a central winding portion for a coil and having transverse flanges at the ends of the winding portion. The flanges are shaped and dimensioned to fit in a structure or resonant cavity, and have facing grooves for receiving and holding a sheet of insulating material in a plane substantially parallel to the coil winding portion. A metallic plate of predetermined size and location is positioned on the insulating sheet, and provided with a connection to an external circuit. The metallic plate provides capacitive coupling to a coil wound on the winding portion. This coupling is of predetermined magnitude and repeatable consistency, since identical coil forms can be made to hold their respective insulating sheets and metallic plates in the same location.

Abstract: An improved tuning apparatus for a receiver of the automotive type which includes a tuning core axially slidable within a tubular coil form having an inductance coil wound therearound in which vibratory movement is minimized. The tuning core is formed with a channel at one end to receive one end of an elongated flexible member. The opposite end of the flexbile member extends away from the axis of the tuning core and abuts against the interior surface of the tubular coil form. In this manner, sliding movement between the tuning core and tubular form and wire is permitted during the tuning operation but a resistance to side-to-side (radial) movement of the core is maintained at other times to minimize the effect of mechanical vibrations thereon which give rise to undesirable microphonics on an associated receiver.

Abstract: A fine tuning coil for use in a local oscillator of a tuner, which is made of a high-tension steel wire or a so-called piano wire. The wire has a diameter which is smaller than that of the conventionally used copper wires, and is loosely wound.

Abstract: The present television fine tuning is so constructed that an initial rotation establishes the fine tuning state and that a continued rotation of the fine tuning shaft performs the fine tuning. For this purpose the present tuner comprises a fine tuning driving member, a rotation transmitting idler member, a plate spring for supporting the idler member and a fine tuning driven member. The driving member includes a fine tuning shaft, a slide gear and a slip clutch mounted in front of a chassis concentrically around a channel selector shaft supported in the chassis. The spring member has freely slidable end portions disposed between the chassis and the slide gear for biasing the slide gear in the forward direction. The idler member is movably arranged on the spring member for transmitting the fine tuning movement. The slide gear has a gear back of a flange and a driven cam surface in the front of the flange and is operatively mounted around the slip clutch.

Abstract: An arrangement is provided for mechanically connecting threaded tuning elements of electrical components to rotators driven by automated apparatus. The arrangement includes tuning tools which provide positive rotation to the tuning elements but which permit relative longitudinal motion between the tuning tools and the tuning elements. The tuning tools further have conical receptacles which are rotated by conical members that self-align with the receptacles. The conical drive members are connected by telescoping and universally joined drive shafts to motors under the control of the automated apparatus.

Abstract: A circuit for coupling a citizens band transceiver and a broadcast band receiver to a standard automobile antenna. The circuit is comprised of an impedance transforming network connected in series with the standard automobile antenna and a parallel-tuned circuit in series with the broadcast band receiver. The series-tuned network is comprised of a split capacitance for stepping the impedance down from the citizens band transceiver to the lower impedance of a standard automobile antenna. The series-tuned circuit also includes a tuning coil for matching the output of the network to the particular automobile antenna. In series between the automobile antenna and the broadcast band receiver is a parallel-tuned circuit comprised of a capacitor and a tuning coil. To prevent multiplication and excessive voltages in the event the broadcast band receiver should become disconnected, a limiting resistor connects the parallel-tuned circuit to ground.

Abstract: A pushbutton tuner suitable for its thinner formation wherein a memory slide member is provided on a base plate of a tuner housing which is shiftable in a direction perpendicular to the sliding direction of a button slide, a gear mechanism is disposed for conjoint rotation with the associated memory slide member, said gear mechanism being connected to the base plate and a subframe attached to said base plate, and a worm wheel for transmitting the rotation to said gear mechanism through frictional members is so supported on said subframe that it may move in the direction of supporting said gear mechanism.

Abstract: A channel-selecting, presettable, rotary type tuning device in which there is provided a tuning-position-determining unit having two or more tuning-position-determining elements, whose positions may be adjustable; a slide member operably coupled to a variable tuning element and spring-loaded so as to abut the end of each tuning-position-determining element selected due to the rotation of the tuning-position-determining unit; means for rotating the tuning-position-determining unit so as to select a tuning-position-determining element; means for moving back and forth each tuning-position-determining-element thus selected; and means for temporarily releasing the slide member from its abutment on each tuning-position-determining element thus selected.

Abstract: A rotary preset tuner comprising a plurality of adjustable memory slugs, a single tuning member capable of being rotated in any direction, a sliding member connected to variable condenser elements and arranged so as to enable reciprocating movement thereof along guide members, and a sliding member reciprocation means for reciprocating the sliding member by rotating the tuning member. Tuning is provided by rotating the tuning member and reciprocating the sliding member to select a desired one of the plurality of adjustable memory slugs, the sliding member being resiliently abutted against the selected memory slug.

Abstract: A push-button mechanism for tuning a radio receiver includes push-buttons that are actuable to rotate a turrent tuner to different extents for station selection. The side of each push-button contacts one end of an individual lever to pivot it through a predetermined angle upon actuation of the push-button. The other end of the lever contacts one of several projections on a bar which extends transversely of the push-buttons and which is coupled via rack and pinion gearing to the drum of the turret tuner. The levers of the different push-buttons have different orientations with respect to the bar so that although each lever is pivoted through the same angle, longitudinal displacement of the bar effected, and hence the setting of the turret tuner, depends upon which push-button is actuated. Upon actuation of a push-button, the bar is locked in its displaced position by means of a leaf spring, and the drum is then locked in position by means of a projection that engages in one of several notches in the drum.

Abstract: A television tuner including a fine tuning mechanism, said mechanism comprising a cam body provided to a sleeve rotatably disposed around the operating shaft, said cam body having a cam surface adapted to convert rotary motion to reciprocating motion, and fine tuning means including a bobbin having a coil around the outside thereof, and a plunger having at one end a core adapted to be disposed within said bobbin, said plunger being L-shaped and composed of a plunger body provided with a core at one end and an arm portion at the other end, said arm portion being kept in contact with said cam surface at the free end thereof so that the plunger reciprocates said core within said bobbin with the rotation of said sleeve.

Abstract: A UHF television tuner utilizes a mechanical fine tuning mechanism that alters the operation frequency of the oscillator of the tuner independently of the position of the main tuning shaft. The mechanical fine tuning mechanism utilizes a tuning slug disposed inside a tunable coil of the oscillator, and a rotary to linear motion translating mechanism is disposed within the fine tuning shaft for converting a rotational motion of the fine tuning shaft to a linear motion of the slug inside the coil.

Abstract: A tuner comprising a plurality of cylindrically assembled bases supported between a pair of support plates secured to a rotatable shaft, receiving circuit blocks for receiving waves in different frequency bands being provided in groups on the inner side of said bases, whereby it is possible to reduce the space requirement for the whole tuner construction and make ready adjustment of the individual receiving circuit blocks.

Abstract: A pushbutton device for preselection tuning in radio receivers, having an adjusting member journalled to be rotatable in a frame of the receiver for engagement by preselection discs and for controlling tuning coils. A manual tuning knob is connected to the member by a slip coupling. The adjusting member forms, together with the slip coupling, a rotatable unit which consists of two portions which are separated by the slip coupling, each portion being supported in a bearing so as to require only a small preselection force.