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: 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: 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: 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 crank mechanism in a pushbutton tuner which comprises a side plate secured on associated one end of crank bars and a crank gear mounted on the outer surface of the side plate, both being supported together by a caulked shaft and one of the crank gear and the side plate being formed with a protuberance formed by deforming a part thereof while the other is formed with a hole for receiving the protuberance.

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 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.