Abstract: A pumping unit for pumping fluids from a location beneath the surface of a field. The rotary motion of a crankarm is changed to a reciprocating motion of a pair of flexible members by pitman arms pivotally secured at one end to the crankarm and at the other end to the flexible members which extend from such connection over a plurality of rollers and then vertically downward toward the well head. The flexible members are connected at their other ends to means connected to the polished rod. Portions of the flexible members and the polished rod lie in the same vertical plane so that true vertical reciprocating movement is imparted to the polished rod. The flexible members comprise non-metallic straps having a substantial width to provide stability of movement.

Abstract: The present invention relates to a method and apparatus for electrically isolating the pump unit for a well, such as an oil well and the like. More particularly, the present method and apparatus electrically isolates the pump unit from electrical currents that are generated within a well casing when a fluid is pumped from the well.

Abstract: A tuning device has a dial drum rotatably supported in a frame, and a rheostat operatively connected to the dial drum. A knob is disposed in alignment with the dial drum. The dial drum has an outer toothing formed on the periphery thereof. A drive gear is secured to the knob, and a reduction gear train is disposed between the drive gear and the outer toothing for transmitting the rotation of the drive gear to the dial drum.

Abstract: A pumping unit or pump jack, of the walking beam type of class I geometry, is provided which is arranged to permit relatively efficient pumping of a well inclined to the vertical, by suitable selection of beam support configuration and location, horsehead size, configuration and position, and position of the beam support fulcrum and beam length. Also provided is an adjustable pumping unit arranged to relatively efficiently pump wells ranging from about 0.degree. to 45.degree. off-vertical, in that the pitman is adjustable in length and the angle of inclination of the longitudinal axis of the samson post is adjustable.

Abstract: A well pumping unit for use in association with an oil well, water well or the like having a downhole pump operated by a reciprocating pump rod with the pumping unit including a pair of large diameter rotatable wheels independently supported from upstanding supports on a deck, platform or skid with the wheels being interconnected by a pin to which a cable for operating the pump rod is attached. The cable is entrained over a series of pulleys and anchored to a supporting structure with one of the pulleys being a traveling pulley having a cable attached thereto extending over a head pulley and connected with the pump rod for reciprocating the pump rod when the wheels are rotated. The pin interconnecting the wheels is received in one of a plurality of radially spaced pairs of openings to enable the stroke of the pump to be varied by varying the radial position of the pin in relation to the rotational axis of the wheels.

Abstract: A station-selecting device for a radio receiver comprises a rotatable control knob for driving an element of a tuning device which is capable of moving between two end positions. Motion transmission is carried out by applying a coefficient of friction between a shaft which is rigidly fixed to the control knob and a driven member. The coefficient of friction is of sufficiently high value to transmit motion when the moving element is located between its end positions and of sufficiently low value to cause displacement of the shaft in sliding motion against the previously driven member when the moving element reaches the end of travel. The driven member is a cyclindrical journal-bearing in which the shaft is rotatably mounted and which is preferably elastic, at least in the radial direction.

Abstract: The drive has a manual coarse/fine focusing device using a gear drive and additional fine focusing using a motor. The latter is effected through an eccentric cam, rotatingly supported in a guide plate and coupled with the motor. A ball bearing rigidly joined with the object holder and the microscope stage rests on the eccentric cam. During operation of the motor, only the ball bearing and, thus, the microscope stage are raised or lowered; the gear drive for manual focusing remains stationary.

Abstract: A carriage for use in disc driving or the like can be driven correctly by a carriage driving apparatus comprising guide shafts extended linearly, a carriage slidably supported on the guide shafts, a pulley holder rotatably supported around one of the guide shafts at one end thereof, a driven pulley rotatably journaled at one side of the pulley holder, a drive pulley disposed at a predetermined distance from the driven pulley and connected to a rotational shaft of a driving motor, a pulling belt laid around between the drive pulley and the driven pulley and connected at an intermediate portion thereof to the carriage and a base for supporting the guide shafts, wherein a pulley holder rotation inhibitive portion is disposed on the opposite side of a mounting portion for the driven pulley with respect to the guide shaft support portion of the pulley holder closely opposing to the base.

Abstract: The present invention pertains to a continuously variable gear device for converting a rotary motion into a linear motion which is dependent on the angle of rotation. The gear device comprises a swivel arm which is rotatable about a fulcrum and is attached to a guide structure on the input and output sides, respectively, of the gear device. Each guide structure is provided with a sliding member to which strings are attached. The swivel arm has guide slots formed on either side of the fulcrum and each guide structure has a roller bearing which engages one of the slots. The mutual distance between the two guide structures is adjustable, by moving one of the guide structures along a positioning rail to vary the transmission ratio of the device.

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: A diffuser is provided with three discharges. Two of the discharges are directed in one direction and, when installed, would be directed towards the outside wall of the conditioned space. The other discharge is directed in the opposite direction and would discharge into the interior of the conditioned space. Responsive to the temperature of the conditioned air being supplied, a thermally responsive actuator is in either one of two positions whereby either one of the two discharges in the one direction or the discharge in the opposite direction is blocked. This results in two discharges in one direction or one in each direction with the discharge area being the same in both instances.

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: An improved fine adjusting mechanism for a preset type tuner, which is so arranged that, with a ring having cam portions being fitted under pressure onto a fine adjusting shaft of a tuner for simultaneous rotation with it and also for slippage with respect to the fine adjusting shaft against a torque larger than a predetermined extent, a lever having a transmission gear rotatably mounted on it is urged by a spring force so that its actuating projections are held in pressure contact with the cam surface of the ring with the cam portions, so that rotation of the fine adjusting shaft is converted into a pivotal movement of the lever through the ring so as to positively engage the transmission gear with each of gears having threaded portions for an efficient local oscillation frequency adjustment.

Abstract: An optical element positioner in which a carriage holding the optical element is driven in response to electrical control signals to selected locations along an optical path by a moving-iron, limited-rotation actuator, with the reflected load inertia substantially matched to the actuator rotor and crank arm inertia.

Abstract: An actuator means is provided for a sleeve type of valve wherein a cable or flat band is caused to rotate one end of a sleeve valve with respect to a fixed second end. The relative rotation can be accomplished to operate the valve and can be provided by a simple linear operating type of pneumatic operator. One version of the disclosure provides an actuator that requires no return spring other than that which would normally be present in the pneumatic actuator itself.

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: An oil well pumping apparatus and method has an increased walking beam distance ratio of saddle pivot-polished rod distance (DE) to saddle pivot-equalizer pivot distance (DC) of at least 1.4:1. A crank arm axis (A) is positioned substantially to the rear of the equalizer pivot (C) and the pitman rod (21) is connected to the crank arm (16) at any selected stroke point along a crank arm wrist pin angle line (AB) offset at an angle (.phi.) to the center line of the crank arm. A precise counterbalancing is provided by radial adjustability of a weight assembly (17) on the crank arm, a floating safety lock assembly (64), and the addition to or subtraction from auxiliary weights (57) on a main weight member (54). The beneficial results of the present invention include reduction of peak torque requirements, elimination of gear reducer load reversals, and lower sucker rod stress throughout a very wide range of pumping applications with a universal piece of hardware.

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: 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 tuner formed of a base unit (A) including a memory slide and operating members for displacing the memory slide upon operation of a push button; a coil unit (B) including a movable member provided with cores displaceable relative to coils; a clutch unit (C) including a clutch mechanism and provided with a rotating shaft for manual tuning operation; and an arm unit (D) including a plurality of button slides fitted with push buttons, respectively, and slidably disposed on a top plate. These units are assembled separately from each other and, then, mounted on a baseplate of the base unit (A).

Abstract: Disclosed is a power drive for electric switchgear in which the driving force is elastically transmitted to an actuating member, for example, a handle. Thereby, tolerance compensation is provided to allow the drive motor to run into the end positions of the drive. A bending-type spring is disclosed as an elastic power transmitting member which is arranged transversely to the direction of motion of a slide which transmits the driving force to the switchgear. The bending-type spring can be connected to the slide. The bending-type spring can be a leaf spring, and more particularly two parallel leaf springs. In the disclosed embodiments, the two parallel leaf springs are provided as a single U-shaped leaf spring having parallel legs. The U-shaped leaf spring can either be supported at both ends thereof in the slide or the legs can be fastened in a mounting body connected to the 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 low profile pumpjack unit for producing fluid from a borehole. The pumpjack unit has a main frame supported below ground level. An upright Sampson post is supported by the main frame. A walking beam is journaled to the upper end of the Sampson post. A pitman arm is connected to and drives one end of the walking beam, while a horsehead is attached to the other end. The horsehead has a pair of curved tracks formed on the outermost surface thereof, each of which describes a segment of a circle, with the circle having a radius drawn from the Sampson post journal. The segment has a diagonal which is slightly shorter than the length of the stroke imparted into the sucker rod. The tracks abruptly curve at each end thereof to form the upper and lower ends of the horsehead. A cable bridle is received by an inside part of the horsehead, with the marginal ends of the bridle being maintained in aligned relationship respective to the two tracks which form the aforesaid circumference.

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: 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: A shock absorber for the pumping unit of an oil well, adapted to be placed between the walking beam and a string of sucker rods in the borehole. The shock absorber has a tubular body of steel (or an equivalent structural material) having a closed top and an open bottom. A circular top on the tubular body has a central opening through which the polished rod is adapted to pass; and a rod clamp is affixed to the polished rod--above the tubular body. A plurality of elastomeric discs, typically four or five, are positioned in a stack within the tubular body; and each disc has an external diameter which is slightly less than the internal diameter of the tubular body. The plurality of elastomeric discs rest on top of a rigid circular plate having an OD smaller than the ID of the tubular body; and the circular plate, in turn, rests on top of a rigid spool.

Abstract: Disclosed is a power drive for electric switchgear, for example, protective low-voltage breakers. The power drive comprises a support plate and a drive slide which is guided between the support plate and the top or front side of the switchgear. The drive slide includes side walls into which a projection located on the top side of the switchgear extends for guiding the drive slide on the switchgear. The drive slide cooperates with the switchgear actuating handle through an opening having curved surfaces. The power drive includes a U-shaped leaf-spring which extends transversely to the direction of motion of the drive slide and which provides for elastic transmission of force from a crank coupled to a gear box to the actuating handle of the switchgear.

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 flexible band positioning device arranged to convert rotaty motion of an outout drum of a stepper motor to linear motion of a carriage supporting a read/write head. A flexible band is attached to the drum and is at least partially wrapped around it. The end portions of the band are each guided around a different idler roller and are attached to a support frame. The idler rollers are rotatably mounted on the carriage and upon wrapping and unwrapping of the band around the drum, caused by rotary movement of the drum, move the carriage linearly.

Abstract: A reciprocator is provided with fixed pulleys and movable pulleys which are reciprocated upward and downward, and a slider for mounting a paint gun is connected to an end of a wire which is led through the fixed pulleys and the movable pulleys.

Abstract: A connector for coupling the drive shaft of a reversible motor to a linear actuator, such as an actuator which carries a magnetic read-write head of a magnetic disk drive system. The actuator has a generally flat side plate at one side of the drive shaft of the motor. A flexible, metallic band is wrapped around the drive shaft and one end of the band is secured to one end of the side plate. The opposite end of the band extends through a slot in the band and is doubled upon itself near its opposite end to form a U-shaped recess near the opposite end of the side plate. A bore extends into the opposite end of the plate and receives a pin which is biased outwardly by a spring, and the outer end of the pin engages a cylindrical cross bar which bears against the inner surface of the band portion which forms the U-shaped recess. The opposite end of the band is secured to the side plate. The spring, pin and bar exert a tension force on the band to prevent backlash and to compensate for ambient temperature variations.

Abstract: A shock absorber apparatus connected in series relationship respective to the polished rod and bridle of a pumpjack unit. The shock absorber includes a housing within which there is supported a plurality of resilient packer members stacked in sandwiched relationship. The packer members have an axial passageway formed therethrough, with the passageway of each packer member being aligned with one another, so that the polished rod is telescopingly received therethrough. The bottom of the housing is supported by the bridle, while the polished rod is supported by a plate member which bears against the uppermost packer member. This places all of the resilient packer members in compression, with the force of the compression being proportional to the weight of the sucker rod.

Abstract: A rotary/linear shuttle mechanism, particularly suitable for use in shuttling the carriage of a dot matrix line printer, is disclosed. The rotary/linear shuttle mechanism includes a pair of stiff, thin bands--one long and one short (35,41). The bands are formed of an inelastic material, such as steel or titanium. Each band has a centrally located loop (formed by a necked down portion of the band passing through a window in the band), and a pair of outwardly extending arms. The loop (67) in the long band (35) is wrapped around, and affixed to a motor pulley (33). The pulley is mounted on the shaft of a low inertia motor (31), such as a moving coil type DC brush motor. The ends of the arms (66,68) of the long band (35) are affixed to the periphery of a large diameter pulley (37). The large diameter pulley is mounted on a shaft (75) that also supports a small diameter pulley (39).

Abstract: A fine/coarse data selector apparatus for aircraft flight control systems and instruments is manually adjustable in either an incremental fine mode or an uninterrupted slew mode by means of a high resolution gear change clutch means which eliminates any gear mesh alignment and resulting undesired signal transducer transients associated therewith.

Abstract: An indication element driving device is incorporated within a tuning apparatus. The driving device comprises a casing of a substantially cylindrical shape with both end faces covered, a driving shaft is rotatably supported passing through the covered end faces of the casing and is adapted to be selectively shifted in its axial direction to a first and second position, and briefly rotated upon a tuning operation. A flywheel disposed coaxially with the driving shaft inside the casing and supported rotatably with respect to said driving shaft. A pulley disposed coaxially with driving shaft at an extended part thereof extending and projecting outside the casing has fine cord wound therearound. A first clutch is operable when the driving shaft is set to the first position, a second clutch is operable when the driving shaft is set to the second position.

Abstract: A rotary/linear motion converter assembly of the type for converting rotational motion to longitudinal motion for longitudinally moving a motion transmitting core element and vice versa, to transmit motion. The assembly includes a sector member having a pair of parallel peripheral grooves therein rotatably supported in a housing with the housing also reciprocally supporting a slider tube with one end of the slider tube adapted for connection to a motion transmitting core element. A pair of cables are attached to the sector member and wrapped about the sector member in the respective grooves with the opposite ends attached to the opposite ends of the slider tube. The cables are preloaded in tension under a force which is greater than the force to be transmitted by the motion transmitting core element so that upon rotation of the sector member, the cables wrap and unwrap in the groove thereof while reciprocating the slider member without lost motion between the sector member and the slider member, i.e.

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: A clutch device, particularly for the manual tuning control in a car radio, has the function of positively transmitting, through rack and pinion gears, movement from the tuning knob to the tuning runner. The clutch device comprises a rotating shaft (16) axially reciprocable with respect to frame (10) between an extracted position and an inserted position, with a knob (18) integral with said shaft. Shaft 16 carries a spur gear (20) at its other end, which in the inserted position of the shaft (16) with respect to frame (10) engages a gear wheel (22) integral with a pinion (24) which, cooperating with a rack (56) connected to the usual tuning runner (58) forms a rack and pinion device for positively transmitting movement.

Abstract: The present fine tuning device comprises a fine tuning shaft mounted concentrically around a main channel selecting shaft supported in a chassis base. A plate spring member is disposed on the chassis for thrust biasing the fine tuning shaft. A gear member is arranged for transmitting the fine tuning movement from the fine tuning shaft to a fine tuning screw. The fine tuning shaft is provided with a radially extending flange and a peripheral gear, and the transmitting gear member is provided with a first gear engageable with the peripheral gear of the fine tuning shaft and a second gear engageable with the fine tuning screw. The plate spring member supports the rotating transmitting gear member whereby the axial direction of movement may be changed or shifted by deformation of the plate spring member.

Abstract: A real time scanned transducer ultrasonic imaging system is disclosed having an improved mechanical scanning system for reciprocating its transducer. The transducer is immersed in a fluid containing chamber. The drive system includes monitoring equipment which produces signals indicating transducer position. Imaging electronics processes (1) electrical signals produced by the transducer in response to ultrasonic echoes, and (2) the transducer position signals from the monitor. Display apparatus produces substantially real time ultrasonically derived images. The drive system includes a transducer carriage which reciprocates on guide rod structure. A drive arm is coupled to the carriage by a compliant coupling element. A drive shaft attached to the drive arm extends through a wall of the chamber, such that the drive shaft oscillates the drive arm.

Abstract: A fuel flow control lever is pivotably mounted for movement between fuel-off and fuel-on positions wherein it respectively engages first and second stops. A solenoid has its plunger linked to the control lever and when the solenoid is deenergized, a spring acting on the plunger holds the latter in an extended position wherein it holds the lever in its fuel-off position. A pair of coils surround the plunger and are selectively simultaneously energizable to retract the plunger to effect movement of the lever to its fuel-on position. The linkage between the plunger and lever is yieldable and the lever reaches its fuel-on position prior to the plunger becoming fully retracted. Upon the plunger becoming fully retracted, a normally closed switch is opened to de-energize one of the coils.

Abstract: A communication set tuner has a control member which varies the tuning status of the set; a rotatable input member is provided for driving the control member; the driving connection between the input member and the control member is so designed that the input member may be positioned on the set in any one of a large plurality of available positions. Thus a single driving mechanism structure may be provided which can be used in many different set environments calling for specifically different locations of the input member.

Abstract: In a pivotally mounted member of the memory fine tuning arrangement for a turret type television tuner, a pivotally moved lever plate provided integrally with a pivotal shaft having head portion, neck portion and body portion, is pivotally mounted on a front wall chassis base by setting the neck portion of the pivotal shaft into a notch of the front wall, wherein assembly of the lever plate to the front wall chassis base can be achieved by the two steps of inserting the head and neck portions of the pivotal shaft into a large opening portion of the notch in the front wall and slidingly setting the neck portion in a small opening portion from the large opening portion through continuous opening portion of the notch. To ensure easy and accurate assembly, a vertical support for the pivotal shaft on the front wall is affixed to the pivotally mounted member so that the parallel relation between the front wall and the lever plate is maintained.

Abstract: In order to drive a unit mounted on a carrier rotatable about an axis, the drive for the unit is transmitted from a unit actuator to the unit-drive mechanism on the carrier by a shaft-driven member so arranged that its rotation relative to the carrier is unaffected by rotation of the carrier itself. In one alternative this is achieved by transmitting the output of the unit actuator through a flexible shaft which enters the carrier tangentially and is guided in the fixed structure for its adjacent end to project in a direction normal to the axis of rotation of the carrier, and in an alternative arrangement rotation transmitted to the carrier actuator is superimposed, by means of a differential gear drive arrangement, one gear of which is geared to the output shaft of the carrier drive actuator, upon the rotation of the pinion transmitting, to a ring gear coaxially rotatable about the carrier, the movement of the unit drive servomotor output shaft.

Abstract: A rotatable link coupling mechanism with a first disc attached to one end of a radio tuner shaft, a second intermediate disc, and a third disc attached to the end of a moveably positioned drive shaft. The first and second discs and the second and third discs are linked together respectively by a series of elongated coupling links which provide rotational coupling between the drive shaft and the radio tuner shaft.

Abstract: A detent type tuning mechanism for a UHF tuner having a continuously variable tuning shaft includes a detented selector shaft, and a fine tuning mechanism including a rotatable turret having mounted thereon a plurality of cams, each adjustable by a fine tuning shaft when the selector shaft is positioned in a predetermined position. A variable impedance element, operated by the fine tuning mechanism, is provided for fine tuning the tuner independently of the position of the selector shaft and the tuning shaft to permit a precise numerical display of the UHF channel selected in each position of the detented selector shaft.

Abstract: A control shaft extends through and is rotatable in a housing parallel to a stub shaft therein which has one end extending through one wall thereof. Within the housing are four bevel gears, one being keyed or fixed to the control shaft, a second rotatable on and relative to the control shaft, and the remaining two meshing with the first and second ones and carried on a block that is rotatable on and relative to the control shaft. The second bevel gear is keyed to the larger of a pair of meshing spur gears, such larger gear being rotatable relative to the control shaft and the smaller spur gear being fixed to the stub shaft. Respective discs are fixed on the adjacent ends of the two shafts, and articulated holding devices are operable to alternately hold and release the discs.

Abstract: Radio tuner assembly with guide means for automatically maintaining the axis of the pinion gear in radial alignment with the crown gear on the tuner shaft. The tuner shaft is rotatably coupled to one end of the guide means. The pinion gear shaft is slidably and rotatably coupled to the other end of the guide means. The pinion gear shaft is coupled to a manual tuning control shaft through a universal joint connection. This arrangement provides a range of adjustable positions for the manual tuning control shaft relative to the radio tuner front panel while automatically maintaining the axis of the pinion gear in radial alignment with the crown gear.

Abstract: A combination UHF and VHF television tuner having a single detented selector shaft for individually selecting each one of the 82 UHF and VHF television channels and a single fine tuning shaft for providing memory fine tuning of channels in both the UHF and VHF bands. A single digital type channel indicator is used for precisely displaying at a single location the channel number of the UHF or VHF channel selected by the common selector shaft. .Iadd.