Abstract: A chip type variable electronic part includes an insulating substrate with a through hole, an adjustment rotor formed of a metal plate in a bowl shape and disposed on the upper surface of the insulating substrate, an internal terminal electrode plate made of a metal plate disposed in close contact with the lower surface of the insulating substrate, and a hollow shaft integrally formed with the internal terminal electrode plate to be fitted in the through hole. The adjustment rotor has a bottom plate rotatably fitted to an upper end portion of the hollow shaft so that the bottom plate makes close contact with the surface of the insulating substrate. The upper end portion of the hollow shaft is crimped to outwardly extend. The bottom plate of the adjustment rotor is smaller in thickness than the remaining portions. Thus, the overall height is reduced without reducing the insertion depth of a screwdriver into the rotor, and without degrading the strength of the insulating substrate.

Abstract: Disclosed is a temperature adjusting device for adjusting or setting temperature of a soldering iron, with the adjustment or setting being allowed to a particular authorized operator. The device comprises a temperature control section having a moveable member which is moveable to change an electric parameter, such as a resistance, as a function of the movement of the moveable member, the temperature control section controlling the temperature of the soldering iron in accordance with the electric parameter; a manipulation member detachably coupled to the moveable member to move the moveable member to change the electric parameter; and an indicator interrelated with the moveable member to indicate an adjusted temperature, the indicator being capable of making the indication even when the manipulation member has been detached from moveable member.

Abstract: By using a two-part assembly of a rotary member (10) bearing one or more wipers (14) clipped on to a substrate member (1) bearing one or more tracks (3), subassemblies may be supplied which can be used by manufacturers of articles (20,21,22) in which it is desired to sense the angular position of one member (20) relative to another (22), but which are easy to install and reliable in use. The assembly provides substantial savings in terms of the number of individual components used, thus reducing manufacturing and assembly costs. Manufacturing costs may also be reduced by using track material as a bearing material, as both track and bearing may be applied simultaneously, e.g. by screen printing.

Abstract: In a rotary sensor of this invention, an angle detection member is composed of sliding pieces having contact portions on a rotation body side and a conductive pattern formed on a substrate arranged on a side opposite to the sliding pieces, the operation shaft has a flat projection portion which extends in a perpendicular direction from the center of rotation at the end, an groove portion extends in a direction perpendicular to the axial direction of the operation shaft, the projection portion is mated with the groove portion, and the contact portions of the sliding pieces are located at positions in a direction substantially perpendicular to the groove direction of the groove portion.

Abstract: A variable resistor is constructed to reliably seal the space between a rotor and a substrate without insert-molding the substrate into a case, and to be produced at a very low cost. This variable resistor includes a hollow square-prism shaped case which is open at the top and the bottom, a substrate which is fitted into the lower opening of the case, and on the top surface of which a collector electrode and an arcuate resistor are provided, a rotor rotatably fitted into the upper opening of the case, a slider mounted on the bottom surface of the rotor and making sliding contact with the collector electrode and the resistor, an annular packing member disposed between the rotor and the substrate for sealing the space therebetween, terminals mounted on the substrate and electrically connected to the resistor and the collector electrode, and a metallic cover.

Abstract: A variable resistor is constructed to prevent bending strain from spreading to the conductive portions to a resistor when bending is executed with respect to the external connection portions of metallic terminals. The variable resistor provides a low-profile variable resistor capable of stabilizing the electrical connection between the metallic terminals and the resistor. This variable resistor includes metallic terminals insert-molded in a board, and a slider sliding on the resistor disposed on the board. The slider is rotatably installed on the board by caulking the grommet disposed on a first metallic terminal,and the conductive portions of second metallic terminals are conductive to the resistor. Each of the external connection portions is extended out of the bottom of the board, and is folded upwardly at the position of the corresponding notch.

Abstract: A variable resistor is constructed to prevent bending strain from spreading to the conductive portions to a resistor when bending is executed with respect to the external connection portions of metallic terminals. The variable resistor provides a low-profile variable resistor capable of stabilizing the electrical connection between the metallic terminals and the resistor. This variable resistor includes metallic terminals insert-molded in a board, and a slider sliding on the resistor disposed on the board. The slider is rotatably installed on the board by caulking the grommet disposed on a first metallic terminal, and the conductive portions of second metallic terminals are conductive to the resistor. Each of the external connection portions is extended out of the bottom of the board, and is folded upwardly at the position of the corresponding notch.

Abstract: A variable resistor comprises a case, slide contactors, a rotor, a metal cover and lead terminals. Arms which are respectively provided at central portions of the slide contactors protrude from a bottom surface of a recess portion of the case and are each shaped like a comb. The arms are respectively contacted, at contact portions A, B and C, by electrodes and resistor of the rotor. Lead terminals are each circular in cross section and are respectively connected, at end surfaces of their lead wires, to the slide contactors. This makes it possible to obtain a variable resistor which is easy to manufacture, low in cost and excellent in reliability.

Abstract: Slack in the engagement of a shaft 5 and a rotor 3 in a case 1 is prevented by the resiliency of an O ring 6 under radial but not axial compression. Even if heat stress is added, the variable resistor which can secure air-tightness is provided. The rotor 3 and a slider 4 are accommodated in the case 1. A resistance substrate 2 having a collector electrode 25 formed on the central portion of the surface and a circular resistor 24 formed concentrically on the periphery of the collector electrode 25 is engaged with the lower end part of the case 1. A stepped surface 12 supporting the peripheral surface and the bottom surface of the O ring 6 is formed on the upper surface of the case. A boss portion 55 contacting the inner circumference of the O ring 6 and an operating portion 51 projecting on the upper surface of the case 1 and covering the stepped surface 12 is formed on the shaft 5.

Abstract: The potentiometer has a housing in which a carrier plate which supports a resistance strip is disposed. A rotary pin is supported on the housing and has a sliding contact connected to the rotary pin for engaging the resistance strip. The carrier plate is rotatably connected to the housing and is embodied for the engagement of a turning tool. It assumes its position with regard to the housing because of a frictional connection. The resistance strip can be oriented with regard to the housing or the sliding contact by rotating the carrier plate relative to the housing and the rotary pin.

Abstract: The present invention relates to an electronic illumination apparatus which may be used in audio equipment. The electronic illumination apparatus allows recognition of the position of rotational operation of a knob by the light from a built-in light emitting diode. The object of the present invention is to provide an illumination type electronic part of rotational operation which is readily adaptable to changes in specifications for the rotational operation shaft. The disclosed apparatus also is able to withstand a strong thrust force applied to the rotational operation shaft, to reduce the hitting sound emitted from the rotatable stopper of the rotational operation shaft, and also to light up the illumination means disposed on the end of the rotational operation shaft in a stable manner.

Abstract: A rotor for use in a rotary position sensor includes an opening designed to receive a shaft having a flat. The rotor has a wedge within the opening designed to engage the shaft firmly but minimize insertion forces. Several troughs running parallel to the shaft and adjacent to the wedge aid in retention by adding a controlled amount of resilience to the rotor. On a shaft receiving end of the rotor there is an additional taper to help with coaxial alignment of the rotor opening and the shaft. On the shaft exiting end there is a half-moon like configuration designed to provide a force opposing surface during shaft insertion while not adversely impacting either the full insertion of the shaft or potential drag between the rotor and the sensor housing. The rotor is designed to offer unique advantage in insertion force to install the rotor on the shaft, while retention force and potential drag against the position sensor housing are minimized.

Abstract: A rotary electronic device of a neutral position return type having an output that is controlled in a stepless mode. A rotary variable resistor of the rotary electronic device is installed on a tubular holder, and a torsion coil spring is disposed between a manipulation knob and the tubular holder. The neutral position return is very simply configured by using a small sized rotary variable resistor.

Abstract: A water heater tank arrangement, control device and shaft extension therefor and methods of making the same are provided, the water heater tank arrangement comprising a water heater tank having a heating unit therefor, a control device carried by the tank and having an operating unit to sense the temperature of the tank and to operate the heating unit in relation to the sensed temperature and a selected temperature of the control device, the control device having a housing and having a temperature selector unit rotatably carried by the housing to set the selected temperature, the selector unit comprising a knob provided with a transverse slot therein, and a shaft extension having opposed ends one of which has drive structure snap-fitted into the slot so that the knob is adapted to be rotated upon the turning of the other of the ends of the shaft extension.

Abstract: A variable resistor includes a case inside which a rotatable member with a resistive element mounted thereon is disposed with a separate rotatable shaft running through a hole formed thereon, a stationary member with external leads attached thereon overlapping the rotatable member with the shaft further running therethrough and extending out thereof to be engaged by a turning knob. The stationary member is secured on the case to form a part thereof. The rotatable shaft is constituted by two segments, an upper segment and a lower segment. A spring is provided between the lower shaft segment and the case to bias the shaft to abut against the rotatable member with an annular flange formed on one end thereof so that when nubs which are formed on the annual flange respectively engage with the corresponding recesses formed on the rotatable member, the rotatable member will follow the rotation of the shaft.

Abstract: A water heater tank arrangement, control device and shaft extension and the methods of making the same are provided, the water heater tank arrangement comprising a water heater tank having a heating unit, a control device carried by the tank and having an operating unit to sense the temperature of the tank and to operate the heating unit in relation to the sensed temperature and a selected temperature of the control device, the control device having a housing and having a temperature selector unit rotatably carried by the housing to set the selected temperature, the selector unit comprising a knob provided with a transverse slot, and a shaft extension having opposed ends one of which has drive structure snap-fitted into the slot so that the knob is adapted to be rotated upon the turning of the other of the ends of the shaft extension.

Abstract: A potentiometer includes a rotatably mounted lever which acts as a follower member adapted to lie in contact with a moveable finger, the movement of which the lever is to follow, the lever being biassed at all times towards the finger by resilient return means.The lever is in the form of a fork having two arms whereby it is adapted to embrace the finger. Whichever one of these arms is in the trailing position with respect to the direction of rotation in which the lever is biassed by the return means is longer than the other arm. In the embodiment described, the longer arm is an active arm, the shorter arm being a security arm.

Abstract: A rotary type electronic device has a stationary casing and an axially slidable and angularly rotatable shaft disposed in the casing. The end of the shaft is assembled to the end face of a detentable (heart-shaped) cam so that the shaft can be pushed axially to engage and disengage from a detent position within the casing. The end of the shaft is formed with a tapered conical tip portion, and the end face of the cam is formed with a central insertion hole, having a diameter smaller than the outer diameter of the conical tip portion, and with cutout portions on opposite sides adjacent the insertion hole forming deformable bridging portions therebetween which deform to allow insertion of the conical tip portion of the shaft in a direction perpendicular to the end face.

Abstract: A potentiometer which can be used for measurement of angles includes an enclosure made of insulating material. The enclosure has a positioning portion comprising a pair of grooves to guide a resistance base plate into the enclosure. The enclosure is provided with a recess extending perpendicular to the plane of the base plate to rotatably receive the shaft portion of a sliding member. This sliding member further includes a slider which is brought into sliding contact with electrodes formed on the base plate. This produces a change in the resistance of a resistance member formed on the base plate.

Abstract: A dual shaft rotary electric device comprises inner and outer concentric shafts, slider supports attached to the inner and outer shafts respectively, sliders attached to the slider supports respectively, and insulating substrates stacked in the longitudinal direction of the dual shaft arrangement and respectively correspondingly to said sliders. An insulating spacer is inserted between the insulating substrates, and is held in place by opposite arms of a front side plate.

Abstract: A slider arrangement comprises an insulator member, and two sliders each made of a resilient metal matel plate embedded in the insulator member and each having slender contacts exposed from the insulator mold member. The slender contacts of each of the sliders forms a pair of contact sets adapted to slide in contact with a resistive element and a collector member respectively, the pair of contact sets of one slider being located between the pair of contact sets of the other slider. A method of producing the above-mentioned slider arrangement comprises the steps of embedding a resilient metal plate having sliders into an insulator member, with contact forming portions of the sliders exposed, cutting off portions bridging the sliders and the contacts formed at the contact forming portions while holding the metal plate by the insulator member, and bending each of the contacts to its proper position.

Abstract: A variable resistor for use in electrical and electronic equipment which includes a base plate, a lower stator terminal housed in a circular recess formed in one surface of the base plate, a rotor member having an electrically conductive film layer at its one surface and an electrically resistant film layer at its other surface and rotatably mounted on the lower stator terminal with the conductive film layer contacting the lower stator terminal, and an upper stator terminal fixed to the base plate so as to slidingly contact the resistant film layer under pressure.

Abstract: A trimming potentiometer having a resistive member and a rotatable member attached to a wiper in contact with the resistive member for varying the position of the wiper thereon, wherein the rotatable member has a peripherally toothed portion and the non-rotatable part of the potentiometer is formed with a plurality of structures defining pivot points for a rotatable adjusting tool, each of the pivot points being spaced from the peripherally toothed portion of the rotatable member by less than the radius of this portion, whereby a toothed adjusting tool can be engaged with any one of the structures and with the toothed portion of the rotatable member for adjustment of the rotatable member by rotation of the tool, the structures being positioned to define different adjustment directions for the tool.

Abstract: A single turn potentiometer is constructed as either an open frame or a housed unit. Both units incorporate a helical coil spring wiper mounted within a rotor. In the open-frame unit, the rotor includes a shaft which extends through a corresponding hole on a ceramic substrate. The ceramic substrate cooperates with the rotor and includes a deposited cermet resistance element and a circular collector ring. A stop arrangement is built into the rotor in the open-frame unit. The closed-frame unit includes a housing having a molded-in stop for cooperation with a similar stop on the rotor. In the open-frame unit, the shaft which protrudes through the hole in the substrate is of split configuration and is spread by an insert to hold the rotor to the substrate in riveting fashion. The closed-frame unit employs a peened-over portion of the housing which is used to constrain the assembly. Means and method for affixing the conductor leads to the substrate are disclosed.

Abstract: An adjustment tool for a rotatable preset potentiometer used in television receivers, or the like, is formed of one-piece, molded plastic material and is insertable into the hollow rotatable hub of the potentiometer. The tool has a shaft which extends into and through the hub of the potentiometer. A resilient, deformable locking member which normally expands to a size greater than the hole in the hub, is carried on one end of the shaft. The locking member is compressible upon insertion into and removal from the hub, and is located to expand outside the hub when the tool is inserted into place. Drive slots are formed in the end of the hub. The tool has a pair of drive slot engaging members at its other end which limit the depth to which the tool can be inserted. These members engage the slots in the hub to permit the tool and the hub to be rotated together. An enlarged head is formed on the end of the shaft having the slot engaging members on it and is of a size to permit it to be grasped for manual rotation.

Abstract: A plug-in shaft is provided for insertion into a noncircular opening provided in a driver and integral hub of a variable resistance control providing a means to alter the rotational torque of the control. Integral with the hub is a dish shaped abuttment section and a driver engagement portion of the shaft supports a plurality of nubbins engaging the abuttment section of the hub upon insertion of the shaft into the noncircular opening to secure the shaft in a predetermined position within the slot. The nubbins engaging the dish shaped abuttment section provide radial pressure on the hub and restrain the axial movement of the shaft within the noncircular opening. An alignment portion of the shaft contiguous with the driver engagement portion rigidly prealigns the shaft in an upright and intact manner within the noncircular opening before the engagement portion and nubbins engage the noncircular opening.