Abstract: An electrical part, either of rotary type or linear slide type, including a circuit pattern, a sliding member sliding on the circuit pattern, and an operating member for operating the sliding member, in which the circuit pattern is provided on a circuit sheet made of an insulating film, the circuit sheet is sandwiched between a pair of support plates, means for slidably and engagedly holding the operating member is provided on either of the support plates, and the operating member is projected out of a through hole provided in the support plate.

Abstract: A keyboard apparatus has a plurality of elastically deformable elastic members disposed on a board in a predetermined positional relationship, a plurality of push members each disposed above each of said plurality of elastic members and adapted to push said elastic member to cause the same to elastically deform and produce an acoustic signal. At least three pickups are disposed on the board at different positions for sensing arrival of the acoustic signal. A detecting circuit determines for detecting the keyed position in response to the output from each of the pickups based upon the differences between arrival times of the acoustic signal at these pickups.

Abstract: A head position adjusting device in a cassette tape recorder includes a movable head base supporting a head thereon, a pivotally movable play lever operatively coupled to the movable head base for moving the head toward and away from a cassette tape loaded in a prescribed position, a pin by which the head base and the play lever are interconnected with a clearance, and an adjustment screw for adjusting the relative position of the head base and the play lever. The head position adjusting device also includes a first connector plate mounted on the head base and a second connector plate mounted on the play lever and movable relatively to the first connector plate, the adjustment screw being threaded through the first connector plate and having an end held in abutment against the second connector plate.

Abstract: A controlling circuit for a stepping motor provided on a disk recording and reproducing apparatus which circuit can prevent outputting of a zero track signal in error that may be caused by a stepping error to assuredly step a head to the zero track of a disk. The circuit comprises an excitation initializing circuit which is operable in response to a power on signal and a drive select signal for sequentially switching the exciting mode of the stepping motor from the AB phase mode to the AB phase mode.

Abstract: A latching mechanism for use in a switch such as a push switch comprises a slider capable of sliding in the casing of the switch, a spring for biasing the slider in one direction, and a driving pin disposed in the direction of movement of the slider and acting to move a movable contact relative to fixed contacts. Both ends of the pin are bent such that the pin assumes a U-shaped form. One of these ends is anchored to a hooked element so as to be horizontally rotatable. The other end is received in a heart-shaped cam groove, and is held into engagement with the bottom of the groove.

Abstract: An input device of the tablet type comprising opposed planar resistance bodies with a plurality of dot spacers interposed therebetween, plate-like insulating bodies made of soft and elastic material and provided respectively and integrally on the outsides of the planar resistance bodies, and a fixed plate for securing and supporting one of the plate-like insulating bodies, and characterized in that a plurality of cavities are formed in an abutment area between the one plate-like insulating body and the fixed plate by which each dot spacer portion can sink when a force is applied, whereby entry of information relating to the dot spacer portion also is allowed.

Abstract: A circuit board for use in a keyboard has a lower insulating sheet, an insulating sheet, and an upper insulating sheet stacked on top of each other. Switch circuit patterns are formed on the upper and lower insulating sheets so as to be opposed to each other. Circuit patterns acting as electrical parts such as rheostats are formed on the insulating spacer.

Abstract: In a magnetic head including a recording and reproducing magnetic core having a transducing gap at an intermediate position and a pair of erasing magnetic cores arranged on respective sides of the recording and reproducing magnetic core so as to straddle the same, thereby forming erasing gaps between the erasing cores and the recording and reproducing magnetic core, respectively, a difficulty of causing an excessive DC magnetic bias to be applied along the length of the transducing gap is eliminated by forming a cut-away portion on a part of surface portion of each erasing magnetic core facing a magnetic recording medium and the transducing gap.

Abstract: A compact pushbutton switch comprises a housing in which three chambers are formed and connected by a common contact member. A fixed contact, a nonconducting member forming a continuation to the fixed contact, a slider movable along both the fixed contact and the nonconducting member, a movable contact fixed to the slider, a control pushbutton mounted to the slider, and a coiled spring are mounted in each of the chambers. The spring is made of an electrically conductive material, and interposed between the common contact member and the movable contact to bias the movable contact out of contact with the fixed contact. When no control pushbuttons are depressed, each spring acts to hold the movable contact out of electrical connection with the fixed contact. When any one of the pushbuttons is depressed, the corresponding spring serves to establish an electrical connection between the corresponding movable contact and fixed contact by its electrical conductive property.

Abstract: An oscillator with a dielectric resonator capable of providing a designated output and being suited for mass production comprising an insulating substrate, a strip structure, a dielectric resonator located adjacent to the strip structure, the last two being mounted on the substrate, and an oscillatory transistor connected to one end of the strip structure. The strip structure consists of two spaced strip sections interconnected by an electrically-conductive bridge-shaped connector section having a conductor part, which is located further away from the insulating substrate and closer to the dielectric resonator than the two strip sections.

Abstract: A snap-attachable holder for holding a number of display elements is adapted to engage with the edge portion of a printed circuit board so that the holder does not add substantially to the thickness of the printed circuit board. The holder is of an L-shaped cross section and has vertical protrusions and pawls for aligning with and snappingly engaging to the printed circuit board. The holder further has guide slots for guiding the terminals of each display element so that they protrude upwardly in the same direction as the pawls.

Abstract: A current location updating display for indicating the current location of moving members such as an automobile while updating from time to time based on output from a magnetic azimuth sensor adapted to detect the azimuth of terrestrial magnetism. Output signals from the magnetic azimuth sensor are stored in a data memory after A/D conversion and correction, and a predetermined amount of data read out from the data memory is subject to the averaging processing. With this, plural angle information (sin .theta. and cos .theta.) signals or plural angle (.theta.) signals are averaged out including a signal corresponding to disturbance magnetism. Thus average data signals are integrated by an integrator and then sent to a display portion. Through the averaging processing an azimuthal error is restrained as small as possible, so that the current location or running path of the moving member may be indicated correctly.

Abstract: A light-transmissive touch panel is disclosed which comprises a substrate, upper and lower electrode sheets, and a transparent double adhesive tape at least between the lower electrode sheet and the substrate so as to be superposed all over their surfaces, the transparent double adhesive tape having a refractive index proximate to those of the lower sheet of the substrate.

Abstract: In a moving object, such as automobile, having a steering gear which determines a traveling course, and a traveling distance detector which detects a traveling distance; a direction detection apparatus comprising a steering position detector detecting an amount of displacement of the steering gear, and an arithmetic unit which calculates a traveling direction of the moving object from a steering position signal proportional to the amount of displacement and a traveling distance signal proportional to the traveling distance, thereby to detect the traveling direction of the moving object. The apparatus can detect the traveling direction without being affected by a magnetic deviation, an abnormal magnetic field, etc.

Abstract: In a recording and reproducing device for a magnetic disc, a swingable holder fixedly supports a first magnetic head, while a carriage supporting the holder swingably further supports a second magnetic head in a fixed manner. During a head-load time, the first and second magnetic heads are held in contact with the upper and lower surfaces of the magnetic disc at positions opposite to each other thereby to record or reproduce information to or from the magnetic disc. The recording and reproducing device of the above described construction is further improved by providing a damper device in a moving range of the holder so that the damper device can reduce impact when the first and second magnetic heads are brought into contact with the magnetic disc.

Abstract: A vibration preventing device in an intermittent driving mechanism for intermittently operating a driven member having a specified mass with a motor, includes an elastic body interposed between an operating member and a stationary member facing thereto which are disposed in a motor power transmission system, and a friction surface formed between the elastic body and the operating member or between the elastic body and the stationary member, whereby at the time of starting the motor, the load on rotation of the motor is gradually increased by elastic deformation of the elastic body.

Abstract: A disk support device for supporting a disk having a central hub having a central support hole and a support hole includes a rotatable drive shaft, a turntable fixedly mounted on the rotatable drive shaft and having a hole for supporting the disk on one surface thereof with the rotatable drive shaft inserted in the central support hole in the disk, and a leaf spring having one end fixed to an opposite surface of the turntable and supporting a positioning pin remotely from the one end thereof, the positioning pin projecting under the resiliency of the leaf spring through the hole in the turntable for engagement in the support hole in the disk, the leaf spring having a locking finger held in engagement with the turntable.

Abstract: A magnetic recorder/reproducer includes a rotary drum supporting first and second playback heads and first and second recording heads for reading information from and writing information in a tape running obliquely to a plane in which the heads rotate, the first playback head, the first recording head, the second playback head, and the second recording head being arranged in the order named in a direction in which the heads rotate, the recording heads being positioned on the rotary drum at a height different from the height at which the playback heads are positioned on the rotary drum, the arrangement being such that while information recorded in a given track on the tape is being reproduced by the ith (i=1, 2) playback head, information is recorded on the same track by the ith recording head. The recording and playback heads are switched over each time the rotary drum makes a half rotation at switching timings that are .pi./2 out of phase.

Abstract: A switch assembly has two rows of pushbutton switches and a rocking plate in between the two rows having projections engaging the switches for preventing the switches of one row from being depressed when any switch in the opposing row is depressed. The rocking plate is pivotably mounted on a shaft such that it can be axially displaced to release the projections from the switches and allow switches from either row to be actuated simultaneously.

Abstract: Disclosed is a detent mechanism for use in a control with a sliding lever, in which the lever is slid to desired operation positions, such as for example, a slide switch or a volume control of a radio. In the detent mechanism, a slide guide is formed with a series of cam crests. Fixed to the sliding lever is a spring member which carries a roller at its leading end which engages with and rolls on the cam crests.