Abstract: Remote programmable reference systems and methods are described. A remote programmable reference system maintains a set of parameters from which a reference signal can be generated to transmit the reference signal to a system platform. In an embodiment, a parameters update can be received from which a modified reference signal can be generated to transmit the modified reference signal. In another embodiment, the remote programmable reference system maintains multiple sets of parameters from which respective reference signals can be generated for any one or more system platforms having different system configurations. The system platforms can interface with the remote programmable reference system through a system interface via a communication network.

Abstract: A system for supervising the landing of an aircraft by a supervisor in a control station, each of the aircraft being incapable of being controlled by any personnel onboard, the system comprises a control station and onboard aircraft control apparatus. The station includes an input device, responsive to the supervisor, for producing a control signal for controlling the landing of the aircraft; and a transmitting device, coupled to the input device, for communication with the aircraft. The aircraft apparatus includes a receiving device for communication with the station; a logic device, coupled to the receiving device, for controlling the aircraft which is programmed to pilot the aircraft to the vicinity of the airfield. The control signal is selected by the supervisor, based on the supervisor's observations of the aircraft and is transmitted to the logic device; in response thereto, the logic device controls the aircraft.

Abstract: A knob for operating a fader as an electronic device of a car stereo is rotatably and axially slidably mounted on a grille detachably attached to a car stereo body. A wall of the car stereo body facing the grille when attached thereto, has an opening through which the knob passes. A manually rotated operating shaft of the fader is disposed inside the body of the car stereo behind the opening. When the knob is pushed into the body through the opening, the knob is connected with the operating shaft of the fader.

Abstract: Disclosed is a push-button tuner in which two desired preset broadcasting frequencies can be tuned in by one push-button. The push-button tuner comprises a plurality of tuning mechanisms each constituted by an operation shaft, and a pair of tuning shafts disposed on the opposite sides of the operation shaft. These operation shaft and tuning shafts are supported movably between the front non-actuation position and the rear actuation position, the operating shaft being provided with a drive gear, a change-over mechanism for alternatively alternately causing the pair of tuning pieces to move relative to the operation shaft to the rear actuation position every one reciprocation of the operation shaft between the front non-actuation position and the rear actuation position, and an enlarging mechanism for enlarging the amount of moving stroke of the operation shaft member and for transmitting the enlarged amount of moving stroke to one of the tuning member which is in its movable state.

Abstract: An improved push button type tuner is disclosed which assures that an operator can selectively tune to one of two preset radio frequencies merely by actuating a single push button. The push button type tuner includes a plurality of channel selecting mechanisms each of which comprises an actuating shaft with a push button fixedly secured thereto and two channel selecting shafts disposed by both the sides of the actuating shaft. The actuating shaft and the channel selecting shafts are supported so as to move between the fore inoperative position and the rear operative position. The actuating shaft includes a main gear and a shifting lever which performs shifting operation in such a manner that the pair of channel selecting shafts are alternately displaced to the rear operative position at every time when a cycle of foreward and rearward movements of the actuating shaft between the fore inoperative position and the rear operative position is achieved.

Abstract: Disclosed is a push-button tuner having a plurality of push-buttons which are preset so as to tune in to preset frequencies of broadcasting stations, in which an actuator plate for setting the positions of variable tuning elements by depressing the push-buttons is divided into a plurality of actuator plate components and the variable tuning elements are allotted to the actuator plate components, the push-buttons being grouped corresponding to the actuator plate components, thereby reducing the actuator plate in size as well as in weight so that it is possible to tune in to the frequency of a desired broadcasting station with a light pressing force.

Abstract: A push-button tuner in which two desired preset broadcasting station frequencies can be selectively tuned in by one push-button comprises a plurality of tuning mechanisms, each of which comprises an operation shaft having a push-button, a pair of tuning shafts respectively disposed on the opposite sides of the operation shaft, and a change-over mechanism for effecting a change-over operation so as to cause the operation member to engage with alternate ones of the pair tuning members in response to alternate reciprocations of the operation member. The push-button tuner comprises a lock plate for holding the tuning shaft in the rear actuation position when it is located in the rear actuation position, and a restriction device for preventing the operation shaft from being urged further rearward when the tuning shaft is held by the lock plate thereby preventing excessive force from being applied to the change-over mechanism.

Abstract: The pushbutton tuner includes a connection member which connects a memory slide plate for transverse displacement in response to tuning operation to a change lever responsive to the memory slide plate to actuate a tuning circuit element. The connection member particularly consists of first step for engagement with the memory slide plate, second step for engagement with the change lever, and a flat portion connecting the both steps.

Abstract: The cross arm mechanism for a pushbutton tuner includes an arm plate rotatably supporting a frequency setting plate, a plate spring mounted on the arm plate for locking the frequency setting plate from its circumference, and first and second pins uniting the arm plate and the plate spring together. The mechanism is particularly characterized in employment the first and second pins which are different in height.

Abstract: The clutch mechanism in a pushbutton tuner comprises a clutch base plate including a hole, a manual tuning gear disposed at one side of the clutch base plate so as to be manually operated, an inner gear disposed at the other side of the clutch base plate and engaging the manual tuning gear through the hole to transmit rotation of the manual tuning gear to a tuning circuit element via an intermediate means to change a constant for frequency selection of the circuit element. The mechanism is particularly characterized in that the manual tuning gear is fixed to the clutch base plate by passing the rotation axle of the manual tuning gear through the hole and capturing the axle by a horseshoe-shaped stopper at the other side of the clutch base plate.

Abstract: Arm mechanism for a pushbutton type tuner including an arm plate for supporting rotatably a frequency defining plate and a plate spring mounted on this arm plate and locking said frequency defining plate at its periphery, whereby a projection is formed at the base portion of said arm plate by embossment both from the upper and lower surfaces of the arm plate.

Abstract: Arm mechanism of a pushbutton type tuner, in which a setting plate is rotatably mounted on an arm, which setting plate has an arc shaped contacting part on the extremity side of the arm; at the periphery of the setting plate is disposed an approximately U-shaped plate spring having an open end on the base side of the arm, which plate spring is fixed to the arm on the extremity side of the arm; on the inner side of the plate spring is formed a tightening part against the contacting part of the setting plate; and a pair of tightening protrusions are disposed on the tightening part, interposing the center line of the arm therebetween, in contact with the contacting part of the setting plate, whereby both the tightening protrusions are comprised between 50.degree. and 70.degree., measuring from the center line of the arm with respect to the center of rotation of the setting plate.

Abstract: A cross arm mechanism in a pushbutton tuner in which a setting plate is pivotally mounted on a cross arm, a plate spring with a support point nearer to the proximal end of the cross arm than the rotation center of the setting plate is mounted on the cross arm, the plate spring has a substantially C-shaped tightening portion which is opened toward the front end of the cross arm to press the setting plate from outside and fix it unmoved, right and left lever portions extend from both ends of the C-shaped tightening portion toward the proximal end of the cross arm, and a means for opening and closing the distance between the levers is provided at the tips of the levers.

Abstract: A tuning shaft for use in switch type pushbutton tuners wherein a clutch shaft portion configured in a regular polygon in its section is formed integrally with the tuning shaft portion as extending from the front end of the tuning shaft portion.

Abstract: A clutch interlocking mechanism for use in a pushbutton tuner wherein a drive gear provided on a clutch mechanism is meshed with a rack of a memory slide, a support bracket, on which the clutch mechanism is mounted, is supported, at one side thereof, by a frame on a chassis through a fulcrum pin and, at the opposite side thereof, provided with a tension spring to assure positive engagement of the drive gear with the rack. The clutch interlocking mechanism further comprises a resilient member provided for the fulcrum pin to eliminate looseness at the portion of the fulcrum pin.

Abstract: In a pointer sliding mechanism intended for use in a pushbutton tuner, there is fixed on the base plate of the tuner a pair of pivots, right and left, on which right and left links are pivotably mounted at the front ends thereof; a pointer mount-plate is pivotably mounted to the right and left links at the rear ends thereof so as to couple these links together. On the other hand, there is provided on the base plate of the pushbutton tuner a memory slide which is movable in the direction of the width of the tuner, and a V-shaped link is mounted between the memory slide and one of the links supporting the pointer mount-plate, which V-shaped link is freely openable and closable; the arm of this V-shaped link on the side of the memory slide is pivotably mounted at the central portion thereof to a pivot fixed to the base plate.

Abstract: A cross arm mechanism in a pushbutton tuner in which a setting plate is pivotally mounted on a cross arm and a plate spring is also disposed on the cross arm so as to hold the setting plate from both sides. The plate spring is movable together with the pushbutton in the length direction of the cross arm upon advancement of the pushbutton. The cross arm has at the front end protuberances for tightening the setting plate by narrowing the width of the opened end of the setting plate upon advancement of the plate spring.

Abstract: Clutch means for changing inductance of a push-button tuner which is compact in size and adapted for use with a tape recorder. The mechanism includes flat slidable cam plates provided with cam portions at the front portions thereof, which are arranged horizontally and slidably through holes of side walls and a push-button assembly slidably arranged in front and rear walls, which is equipped with a channeling plate pivotably mounted thereon, the position of which may be set at a desired angle by means of the operation of a manual shaft when a clutch mechanism is engaged.

Abstract: A pushbutton tuner arm mechanism features a lockable setting plate rotatably mounted on an arm reciprocatingly actuated by a pushbutton, the setting plate having an extension configured to engage a V-shaped tuning notch in a memory slide. A locking spring affixed to the arm peripherally engages portions of the setting plate to hold the arm in a chosen position, the locking force being releasable upon extraction of the pushbutton. An arcuate boss integral with the setting plate is configured to engage portions of a generally V-shaped cut in the arm to provide positive play-free locking of the setting arm in position.

Abstract: A pushbutton-operated waveband or station selector which comprises a tuning axis having a tuning knob and rotatably-mounted on a tuning axis mounting plate, an idler plate driving gear rotatably mounted on the plate, an idler roller or gear disposed between the tuning axis and the idler plate driving gear for transmitting rotation of the tuning axis to the idler plate driving gear; the idler roller or gear is rotatably mounted on a clutch lever operatively coupled on a kick arm and the idler plate driving gear is in meshing engagement with a rack gear of an idler plate operatively coupled on a core slide.

Abstract: A pushbutton-operated waveband or station selector which comprises a three-armed link with three arms pivotally disposed on a frame of the station selector by means of a pivotal shaft; the first and third arm at the opposite ends of the three-armed link being formed with guide portions for being slidably coupled with guide portions formed in a first and third members for movement to different directions and extending perpendicularly to the moving directions, the second arm at the center of the three-armed link being formed with a guide portion for being slidably coupled with a second member for movement to a different direction from those of the first and third members and extending perpendicularly of the moving direction of the second member.

Abstract: In a pushbutton tuner wherein cross arms are mounted with their flat surface parallel with the surface of the tuner base, a cross arm mechanism includes a pivotally supporting portion of a frequency setting member inserted in an engaging hole of a fixing plate mounted along the cross arm, a slit which is formed in the fixing plate so as to open at one end of the same to be inserted in the pushbutton extends to a hole formed in the same by passing through the engaging hole, and a pair of side faces for receiving a force which narrows the slit are formed at both sides of the end of the fixing plate where the slit opens, so that contacting portions formed on a slide member slidable in response to advance of the pushbutton come to stress the side faces.

Abstract: In a cross arm mechanism in a pushbutton tuner including a setting plate pivotally coupled to a setting pin provided on a cross arm and a plate spring so mounted as to surround the setting plate whereby fixing the setting plate to the cross arm when a pushbutton is mounted on the cross arm, an improvement which comprises a sectorial protuberance formed on one surface of the setting plate, a guide hole in a symmetrical V-like configuration formed in the cross arm for receiving the sectorial protuberance, a suppressing means for suppressing the sectorial protuberance toward the narrowed portion of said V-like guide hole.

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: In a push-button tuner including a tuning slide member which has a positioning portion in one side edge and which is slidable in a predetermined direction, a lock member which is movable in a direction orthogonal to the sliding direction of the tuning slide member and which is provided with cam member grasping means, and a cam member which is turnably supported by the lock member. The cam member comes into engagement with the positioning portion of the tuning slide member and has its position in its turning direction fixed by the cam member grasping means. The positioning portion of the tuning slide member is provided with an elastic piece. When the lock member has been thrust to the tuning slide member, the cam member comes into pressed contact with the elastic piece, and the elastic piece retreats. Thus, the abutting force between the tuning slide member and the cam member is lightened.

Abstract: A link mechanism in a pushbutton-operated waveband or station selector in which a link with a plurality of arms is pivotably fitted on a pivotal shaft; in order to couple to these link arms members which move in different directions, each of the members being provided with a guide means extending perpendicular to the moving direction of the member, a guide member provided at each of said arms of the link being slidably engaged with the guide means; the angle formed between each of the link arm and the moving direction of each member coupled with the arm being so set to always be greater or smaller than a right angle within the moving range of each member that no point of inflection will occurs in the moving orbit of the guide member of each arm within the guide means of each member.

Abstract: A push-button type tuner comprises a tuning slide member having a positioning portion on one side edge thereof and being capable of sliding in a predetermined direction, a locking member supporting a cam member and capable of moving in a direction substantially perpendicular; to the sliding direction of said tuning slide member.

Abstract: A pushbutton tuner wherein a setting plate having a guide slot is fitted in an opening formed on a chassis and adapted to be rotated or fixed by a slide plate interlocked with a button slide, a link having a guide opening is rotatably fitted on the setting plate and a setting arm pivotally connected to the button slide is engaged with the guide slot of the setting plate and the guide opening of the link, the link being operable to displace a memory slide.

Abstract: A pushbutton-operated waveband or station selector or tuner, comprising a front panel to which a bracket for each pushbutton is supported perpendicular thereto so as to be movable to-and-fro, said pushbutton being provided with a push piece for kick arm and a setting plate which can engage a pivoting crank, the kick arm being disposed on the rear side of said front panel parallelly thereto, so that it is pivotable with respect to right and left side plates of the apparatus. At the rear of said kick arm, there is disposed the pivoting crank (31) which is mounted at the opposite ends thereof so as to be pivotable with respect to the frame side plate, and above said pivoting crank there is movably supported a core slide which is coupled with said pivoting crank, said core slide having mounted on the rear portion thereof a plurality of cores directed toward the rear side of the apparatus, these cores each being inserted into a movable to-and-fro in a respective tuning coil disposed at the rear of the apparatus.

Abstract: A release mechanism of a push-button tuner for use in car radios etc., comprising a manual tuning shaft which has a threaded portion, a release plate which is movably and turnably installed on a guide rod disposed in parallel with the manual tuning shaft and which is provided with a friction plate corresponding to the threaded portion, a core carriage which moves in the same direction as a moving direction of the release plate in interlocking with a movement thereof, and a release plate which is operated by depressing a push button. The friction plate and the threaded portion are held in engagement in the normal state, and the engagement is released when the push button is depressed.

Abstract: A push-button type tuning apparatus comprises a frame consisting of a front side plate part, a rear side plate part, right and left side plate parts, and a bottom plate part, a coil case fixedly provided on the frame, a plurality of guiding members at least having one end fixed to the front side plate part of the frame and extending towards the rear side plate part, a slider capable of sliding under the guide of said guiding members provided on the guiding members, a rotatable member axially supported at both side plate parts in a rotatable state, and a plurality of push-button assemblies arranged and provided in the frame. The frame is formed from a single plate member by unitarily bending the front and rear side plate parts and the right and left side plate parts at four sides of the bottom plate part.

Abstract: A pushbutton tuner has a plurality of pushbutton actuators each comprised of a slide plate carried by a support plate for movement between operative and inoperative positions, a lockable control plate pivotally mounted on the slide plate, and a pair of upright pins fixedly mounted on the control plate. A pair of movable plates are carried by the support plate so as to be movable across the array of slide plates and both movable plates are formed with cam edges adapted to engage one of the upright pins of the pair as the slide plate moves to its operative position. The pair of movable plates are connected at one end to first and second link members which cause the movable plates to move in opposite directions in response to the engagement of respective ones of the upright pins with respective ones of the cam edges of the movable plates.

Abstract: A crank mechanism in a pushbutton tuner is characterized in that a crank gear and a backlash preventing gear, both mounted on one associated end of crank bars of the pushbutton tuner, are formed with stepped-down portions so that teeth formed on them are positioned inward of the crank bars with respect to the base portions of the gears.

Abstract: In a guide shaft perpendicularly secured on a member with the base end thereof by caulking and serving with the outer peripheral surface thereof as a guide portion, a guide shaft characterized in that there is formed a step portion having a diameter smaller than that of the other portion thereof at the corner where the top end surface and the outer peripheral surface of the shaft intersect with each other.

Abstract: End caps of a pushbutton assembly are formed to include biased tabs with raised portions extending towards adjacent pushbutton end caps so that when the pushbuttons of the assembly are in their unactuated position along a common reference plane, lateral compression exists between the pushbuttons so that rattle noise is eliminated.

Abstract: An operating shaft mechanism in a pushbutton tuner, etc. characterized in that there is formed an enlarged portion in a central portion of a shaft element and the enlarged portion is formed with a plurality of slits in different phases with each other. The enlarged portion thus comprises a plurality of disc portions connected to each other by connecting portions which remain at the bottoms of the slits, thus to be flexible.

Abstract: An electronic tuning block including a plurality of screw drive type variable resistors are juxtaposed parallel to one another obliquely on an insulating substrate, and holes for receiving pointers fitted to the screws of the variable resistors and holes for receiving rotary knobs fitted to the tips of the screw shaft are formed on the upper surface of a box-shaped insulating case which is fixed to the insulating substrate.

Abstract: A cross arm structure for use in a pushbutton tuner comprising a frequency setting plate pivotally supported on the cross arm and a pushing member disposed adjacent to the frequency setting plate for pressing or releasing the frequency setting plate in response to the sliding operation of the pushbutton, characterized in that the frequency setting plate is kept in a pivotal position by means of an early lock preventing plate cooperable with a top end portion of the pushing member.

Abstract: A bearing mechanism for clutch shaft, in which a U-shaped fork bracket is secured to the frame side face of a pushbutton-operated tuner, of the right and left arms of said U-shaped fork bracket, to the one on the frame side being formed a V-shaped bearing hole, the portion of clutch shaft on the frame side being received in said V-shaped bearing hole; a circular bearing hole being formed in the opposite arm of said fork bracket, the tapered portion formed on the other end portion of the clutch shaft being fitted in said circular bearing hole.

Abstract: A key assembly for receiving units employed in communications engineering, articularly for television receivers, comprises a plurality of mutually releasable depressible keys adapted to switch on storable, selectively adjustable electrical values supplied by channel memories consisting of a plurality of voltage dividers for capacitance diode tuning, further comprising, in association with the respective depressible keys, a plurality of depressible and rotatable knobs adapted to be rotated by means of a tool, said knobs being concealed behind a cover member slidably guided in a recess, said knobs being adapted to provide channel tuning and, if required, selection of the desired frequency range, said frequency range being adjustable by rotating the respective depressible and rotatable knob into any of a plurality of detented angular positions with the knob being in a position differing from the tuning position of the knob, and comprising a switch which is adapted to be actuated by means of a push rod which is c

Abstract: A push-button type tuning apparatus comprises a frame, a plurality of push-button assemblies each having a push-button on one end thereof, and inserted into and supported by the frame, where the push-button assembly is slidable in the pushing direction between a non-operational position and an operational position, a cam member provided on the frame, where the cam member is slidable in a direction perpendicular to the pushing direction of the push-button assembly, and a tuner provided on the frame, where the tuner is tuned according to the sliding quantity of the cam member. The push-button assembly further has a memory piece which has a V-shaped cam portion, where the memory piece is rotatably supported in the vicinity of the open portion of the V-shaped cam portion in a state in which the vertex of the V-shaped cam portion faces towards the direction of the push-button, and locking means for locking the memory piece at a desired rotated position.

Abstract: A key assembly for receivers for communication systems, especially radio television receivers, comprises a casing, keys adapted for mutual release by means of a spring-loaded locking plate for switching in storable, selectively adjustable electrical values of channel memories consisting of a plurality of voltage dividers for variable capacitance diode tuning, rotary and slidable press buttons associated with the respective keys for channel tuning and optionally for selecting a frequency range, which is adjustable in a preferably pressed position of the rotary press button being different from the tuning position by turning into various locking angular positions, as well as a channel and frequency range indicator scale. According to the invention said indicator scale simultaneously is the locking plate for the keys.

Abstract: A pushbutton tuner includes a plurality of pushbutton actuators each effective to achieve a tuning to a desired preset frequency. Each pushbutton actuator includes a slide plate carried by a support plate so as to be movable between operative and inoperative positions, a lockable control plate pivotally mounted on the slide plate, a pair of upright pins fixedly mounted on the control plate, and a pair of cam members having their one end pivotally mounted on the support plate so that one of the upright pins engages one of the cam members as the slide plate moves to its operative position. A pair of movable plates are carried by the support plate so as to be movable across the slide plates. One of the movable plates is pivotally connected with the other end of one of the cam members while the other movable plate is pivotally connected with the other end of the other cam member.

Abstract: A pushbutton tuner comprising button slides disposed within a plane in parallel with a baseplate and link members operable by setting pins provided on the respective button slides also disposed within a plane in parallel with the baseplate. A memory slide is displaced by rotation of a free end of each link member when the setting pin moves rearwardly. Each of the link members is so disposed that a line drawn between its portion where it is pivotally connected to the basetable and its portion where it is pivotally engaged with the memory slide is parallel with the rearward movement of the setting pin. The link members each have symmetrically convexed engaging edges at opposite sides thereof. In the position where the link members are disposed on the baseplate so as to be close each other, the setting pins are adapted to act on the adjacent engaging edges of the link members.

Abstract: A push-button type tuner apparatus comprises a slide cam member having a plurality of V-shaped cam parts formed therein and supported slidably in the transverse direction on a frame structure, and a plurality of manually operated structure supported slidably backwards and forwards on the frame structure. Each manually operated structure is provided with a memory member for restricting the position of the slide cam member when engaged with an associated V-shaped cam part thereof, a clamp member for supporting the memory member in a clampable manner, and a clamp cam member supported to slide with respect to the clamp member and for causing the clamp member to undergo clamping operation responsive to slide motion of the clamp cam member.

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 pushbutton tuner including a support plate, tuning means mounted on the support so as to be movable to a position which corresponds to a tuning frequency to be established, and a plurality of presettable pushbutton actuators for selectively adjusting the tuning means to individual positions, each of the pushbutton actuators including a pushbutton which is movable between a front inoperative and a rear operative position relative to the support plate and which is normally urged to its inoperative position, a control plate pivotally mounted on the support plate and having lengthwise elongate slots formed in its opposite ends, the control plate assuming a position relative to the support plate which can be adjusted, a preset plate for releasably locking the control plate on the support plate, a first operating lever having its one end pivotally mounted on the pushbutton and carrying a pin on its other end which is fitted into one of the slots in the control plate, and a second operating lever having its one en

Abstract: A device for disabling the engagement control of the tuning knob, particularly for a keyboard car radio, allows to disable the tuning knob as soon as one of the keys is preset to a corresponding desired station. The device comprises a rocking member (30) having two arms (32) and (34), which has its fulcrum on slide frame (24) of key (12) and a pin (38) integral with key cap (26) of key (12), which key cap (26) is movable on slide frame (24) between an inserted position and an extracted position. The arrangement is such that, in the inserted position of cap (26) with respect to frame (24) of the key, pin (38) locks arm (34) of rocking member (30), which through its other arm (32) moves a slider (20) which controls disengagement of the clutch, thus relieving the control from the tuning knob when key (12) is in its operative position.

Abstract: The pushbutton tuner comprises a plurality of pushbutton assemblies arranged side by side and parallel to each other. Each pushbutton assembly is movable in its longitudinal direction towards and away from a control bar slidably arranged transversely with respect to the pushbutton assemblies and operatively connected with the tuner group of the radio set. The improvement resides in the fact that the transverse control bar carries an abutment pin for each pushbutton assembly, while each pushbutton assembly carries a V-shaped notch presenting two inclined edges which are intended to cooperate with the respective abutment pin provided on the transverse control bar.

Abstract: A changeover mechanism for a multi-band pushbutton tuner in which a plurality of button slides with push buttons secured thereto, respectively, have each a pair of auxiliary slide members disposed on opposite sides thereof, lock members are mounted on pivotal seats of the button slides so as to rock thereon, respectively, and a changeover plate has operative portions which are engageable with cam portions formed on the respective upper edges of the lock members, to change over the position of the lock members relative to the button slides by displacement of the changeover plate, which mechanism is characterized in that the changeover plate is provided with an operative projection which is engageable with an operative member rotatably mounted on a support frame provided over an area where the push buttons are disposed, the operative member is engageable, at opposite ends thereof, with interlocking links, respectively, and the interlocking links are connected to push-actuators provided on opposite ends of the s