Abstract: A rotary encoder comprises a case containing a rotary brush setting plate and an idler gear which is associated with an inside gear formed on the brush setting plate and a reduction gear contained in the case and connected to a driving shaft penetrating the case. Brushes on the rotary brush setting plate rotatingly slide on the plural pulse producing conductive patterns formed on inside surface of the case, thereby to effect switching in plural modes as the shaft revolves.

Abstract: In a push-on switch comprising a moving contact 6 of partial-hemisphere-face-shaped resilient metal diaphragm which is disposed with its periphery on a pair of peripheral fixed contacts 2b,2b in a contacting manner and at its central part apart above a central fixed contact 2a in an isolated manner at normal state,the improvement is made such that the metal diaphragm moving contact 6 has an opening 6a having at least a protrusion 6b with respect to the opening 6a;so that the opening 6a allows air to pass at inversing and restoring motions of the central principal part of the moving contact 6, thereby preventing drafting of dust onto the central fixed contact 2a, and that the protrusion 6b slides on and cleans the surface of the central fixed contact 2a at each pushing down of the central part of the moving contact 6.

Abstract: A variable resistor whose operating shaft may be click set or stopped to a preselected angular position when a projection of a click spring, which is mounted together with a wiper arm on a wiper arm mounting member, drops into a click slot of a click disk fitted into a cover or a casing generally in the form of a cup. The click disk is rotatably fitted into the cover or the casing in such a way that a torque required for rotating the click disk relative to the cover or the casing is higher than a first torque required for releasing the projection of the click spring out of the click slot of the click disk when the operating shaft is in a first position, but is lower than a torque required for releasing the projection of the click spring out of the click slot of the click disk when the operating shaft is axially shifted from said first position to a second position.

Abstract: A mechanical control system comprising a master or a controller which is rotated in control operations, a slave or a controlled unit such as a rotary electric control component such as a variable resistor, and a mechanical power transmission means for interconnecting between the master and slave for transmitting the turning force of the master to the slave. The mechanical power transmission means comprises a core and a plurality of helical spring layers tightly wound one upon another alternately in the opposite directions so that the angular mismatching or misalignment between the master and slave may be avoided. Since the master and slave may be spaced apart from each other, the layouts of electric components may be remarkably facilitated even in a very limited space.

Abstract: An interlocked push-lock push-button switch assembly of the type in which when one of the switch buttons each formed integral with an operating-bridging member is depressed, it is locked in pushed-down position so that the movable contacts are made into contact with the mating stationary contacts, but when another switch button is depressed, the switch which has been locked in position is released. An inverted U-shaped movable contact member with the movable contacts attached to the ends thereof is retained in position by a movable-contact-member retaining member formed integral with the operating-bridging member.

Abstract: The invention discloses an electronic input-interruption timer for use with an electrical appliance such as a washing machine, a fan, a refrigerator and so on. The timer comprises an integrator consisting of an input resistor and a capacitor, a switching element, a MOS field-effect transistor, a discharge resistor, and a switching circuit operable in response to the magnitude of the drain current of the field-effect transistor; the field-transistor, the switching element, the capacitor and the discharge resistor being embedded or potted in a molded plastic insulation. Since the capacitor and the discharge resistor are completely air- and water-tightly sealed, the highly reliable and dependable operation may be ensured even when used with a water-handling appliance such as a washing machine.

Abstract: In a device of the type in which the output voltage derived from the source of a MOS field-effect transistor is varied in response to the voltage across a non-polarized capacitor connected to the gate of the field-effect transistor, positive and negative inputs are provided by two switching elements which are controlled in response to small DC signals. The device functions as a variable resistor, and is adapted to be remotely controlled.

Abstract: A remote control system including a variable resistor with switching means the variable resistor unit comprises a variable resistor and a switching means, said switching means being interlocked to said variable resistor such that said switching means is operated only when it is desired to adjust the variable resistor. With this variable resistor with switching means the operation of the switching means and adjustment of the variable resistor for volume control or the like can be effected through a single operation.

Abstract: The present invention discloses a mechanical pushbutton type pulse generating switch for use in a telephone set comprising, in general, pulse generating switch units, a push-break return-make switch unit, and an end pulse generating switch unit. The pulse generating switch unit has a common normally closed contact attached to one side surface of an operating or push-button shaft having a polygonal cross sectional configuration and a plurality of make-break contact groups attached to the remaining side surfaces of the operating shaft and brushes or wipers disposed in opposed relation with and for contact with the common and make-break contacts respectively. The push-break return-make switch unit circuit is connected in series to a parallel circuit consisting of the pulse generating switch unit circuit and the end pulse generating switch unit circuit.

Abstract: A variable resistor is disclosed which may readily attain or reproduce a preset value. A wiper arm or plate is carried by an outer shaft for rotation with a wiper in sliding contact with a resistor so that the resistance value may be continuously varied in a conventional manner. In order to detect the angular position of the outer shaft where a preset value is obtained, a click mechanism is incorporated. A click spring of the click mechanism is fixed to a switching plate carried by an inner shaft fitted into the outer shaft for rotation therewith or independently thereof in case of presetting, and a ball loosely carried at the free end of the click spring is adapted to engage with a recess formed at a predetermined position of a stationary click plate so that the inner shaft may be stopped at a predetermined angular position.

Abstract: A voltage memory device is disclosed wherein the gate of a MOS field-effect transistor is connected to one terminal of a capacitor and to an input voltage terminal through an input resistor and through the contacts of a reed relay while the source is connected to an output terminal and an output resistor, the input resistor being inserted in order to determine the charging time of the capacitor. When the reed relay is actuated, the capacitor is charged or discharged depending upon whether the input voltage terminal is connected to a positive or negative voltage supply source so that the output voltage increases or decreases. When the reed relay is de-energized, the output voltage remains at the same level. The voltage memory device has a function similar to that of the conventional variable resistors, but it eliminates the use of any sliding part and is operable at a relatively low voltage in a reliable and dependable manner. The voltage memory may be used in an automatic control system.

Abstract: Herein disclosed is a variable resistor device which may be used as a tuner in an electric appliance such as a television receiver and a stereophonograph, which resistor device comprises a support member having a base wall portion and at least one end wall portion perpendicular to the base wall portion, an elongate resistance element on the inner face of the base wall portion, a control shaft rotatable on the end wall portion and having a threaded axial portion extending over the resistance element, a slider having a contact portion elastically forced against the resistance element and an edge portion in mating engagement with the threaded axial portion of the control shaft for providing electrical connection between the resistance element and the shaft, and an electrically conductive retainer for holding the control shaft in position relative to the support member while permitting the control shaft to rotate about its axis. Features of the device include ease of assemblage and reliability of operation.

Abstract: A variable resistor provided with a mechanism which permits the tap resistance to be varied non-linearly; that is, the mechanism permits a contactor to be displaced at a varying rate in response to the operation of input means at a constant rate.

Abstract: There is provided a combined variable resistor assembly provided with position indicator means for indicating positions of individual variable resistors by respective bright spots adapted to be moved by manipulating the associated variable resistors. This variable resistor assembly may find use mainly for electronic tuners, and with which the present states of the individual variable resistors for volume control, balance control, sound quality control and so forth can be known at a glance at the indicator means.

Abstract: There is provided a combined variable resistor assembly provided with position indicator means for indicating positions of individual variable resistors by respective bright spots adapted to be moved by manipulating the associated variable resistors. This variable resistor assembly may find use mainly for electronic tuners, and with which the present states of the individual variable resistors for volume control, balance control, sound quality control and so forth can be known at a glance at the indicator means.

Abstract: An assembly for fine adjustment of a variable impedance mechanism is disclosed wherein a first disk-shaped rotary member, which functions as a knob, has a spiral ridge or groove formed on one side surface thereof for engagement with the teeth of a second disk-shaped rotary member or teethed wheel whose shaft is in turn coupled to the rotary shaft of a variable impedance element. When the first rotary member makes one rotation, the second rotary member is advanced one tooth, whereupon the fine adjustment of the variable impedance element is possible.

Abstract: A first pair of variable resistors are mounted on two opposite walls of a substantially rectangular outer casing in such manner that their rotary shafts coaxially extend through the walls and are attached to two opposite walls of a substantially rectangular inner casing. A second pair of variable resistors are mounted on two opposite walls of the inner casing in such manner that the rotary shafts are coaxial and that the axis of the shafts of the second pair of resistors is perpendicular to the axis of the shafts of the first pair of resistors. A connecting member links the shafts of the second pair of variable resistors.