Abstract: Disclosed is an objective actuator comprising an object lens holder for holding an object lens, the object lens holder being mounted on a support shaft in a manner that the object lens holder is slidable along and rotatable about the support shaft; a drive coil mounted on the object lens holder; first yoke provided with drive magnets, the first yoke being mounted in such manner that the drive magnets confront with the drive coil, the first yoke having a center hole which is larger in diameter than the support shaft, the first yoke and the support shaft are integrally connected by molding; and shaft holding member defined by filling a resin at the center hole of the first yoke, the shaft holding member including a base portion.

Abstract: A motor control apparatus composed of a first pulse multiplier circuit for multiplying command pulses by a first factor, encoder circuit for detecting a position of a motor-driven object, a second pulse multiplier circuit for multiplying a detection pulse from the encoder circuit by a second factor, a deviation counter circuit for detecting a difference between output pulses of the first and second multipliers, a divider circuit for dividing an output signal of the deviation counter by the second factor, and driving source driven by the control apparatus in accordance with an output of the divider.

Abstract: A power spring drive apparatus having a power spring on a power spring wind up shaft, an output shaft, and a gear train for winding the power spring and for transferring the rotational force of a wound power spring to the output shaft. The apparatus is in a housing case formed of first and second synthetic resin cases connected together by pins and receiving holes. The housing case has a power spring housing section with a window between the section and externally of the housing. One end of the power spring has a neck shape and extends through the window and is fastened to the housing.

Abstract: A speed governor for a music box driven by an energized spring includes a worm wheel operatively connected to and driven by the energized spring; a worm shaft driven by the worm wheel; a rotary member connected to the shaft and driven by the wheel and having a top, a bottom and at least one peripheral surface, the member including a plurality of coupling portions connected to the shaft, which are elastically deformed due to rotation, each of the coupling portions having at least one groove and being disposed so that at least one of the top and the bottom surfaces of each of the coupling portions is located substantially parallel to but not coincident with an imaginary plane containing the center of gravity of the member located perpendicular to the shaft: and a brake portion provided near one of the top, the bottom or peripheral surface of the member so as to be rubbed by one of the top, the bottom or peripheral surface when the rotational speed of the rotary member is greater than or equal to a predetermined

Abstract: A speed governor comprises a speed increasing wheel train and an electroconductive plate confronting a magnet, the electroconductive plate integrally formed with the final stage of the speed increasing wheel train, a disk-like yoke, a cup-like yoke, abutted against the disk-like yoke, enclosing the electroconductive plate, a magnet fixed on one of the disk-like yoke and the cup-like yoke, and a plurality of inclined surfaces formed on a circumferential end surface of the cup-like yoke, each of the plurality of inclined surfaces identical with each other, each of the plurality of inclined surfaces abutted against a projection of the disk-like yoke whereby one of the disk-like yoke and the cup-like yoke can be moved in a circumferential direction.

Abstract: An electrochromic display device uses a metal-phthalocyanine derivative as an electrochromic material at the display electrode side and a metal-phthalocyanine derivative being preliminarily held in a reduced state or a redox material being stable in an oxidized state at the counter electrode side.

Abstract: A method of detecting an edge of a magnetic tape, using a magnetic head device with a magnetic head capable of reading after writing and having a read gap and a write gap, and a switch for selectively electrically connecting the write gap to a write circuit and a read circuit. The steps of the method are: running the tape while moving the magnetic head from a predetermined initial position in the widthwise of the tape until the magnetic head reaches the edge of the tape to record a signal on the tape; subsequently rewinding the tape to the predetermined initial position to return the magnetic head to a position of the tape where the signal has been recorded; subsequently, under the condition of electrically connecting the write gap to the read circuit to cause the write gap to serve as a read gap, running the tape while causing the magnetic head to follow the signal recorded on the tape to read the signal; and subsequently comparing the read signal with a reference value to detect the edge of the tape.

Abstract: Herein disclosed is a continuous speed change type door check for closing a door, which comprises: a pivot pin made rotatable; a slider adapted to be linearly moved by the rotations of the pivot pin and to rotate the pivot pin when it returns; a coil spring for biasing the slider to return; a gear train for speeding up the rotations of the pivot pin; a brake connected to the gear train; and a one-way transmission clutch for operating the brake in a direction to close the door.

Abstract: A magnetic movement detector employing a constant current drive system wherein the consumed power is reduced and temperature increases suppressed, thereby preventing a decrease in the output voltage. A magnetic recording medium is magnetized with a repetitive signal having a wavelength .lambda.. A magnetic resistance element disposed adjacent the recording medium is composed of 2m serially connected magnetic resistance strips which are arranged at intervals of (n-1/2).lambda., where m and n are natural numbers. A DC source is connected to interconnected ends of two adjacent ones of the strips, while constant current source are connected to ends of respective other ones of the strips. An output signal is produced as the difference between the voltages at the ends of the latter two strips.

Abstract: A magnetic tape cassette ejecting device, which includes a holder carriage holding a cassette to be moved between a recording and reproducing position and a cassette insertion and removal position. The ejecting device also includes an arm which is swung with the displacement of the holder carriage, a reversing lever engaged with the swing arm which is turned as the arm swings, and a reversing spring interposed between the reversing lever and a swingable fulcrum lever. The fulcrum lever is integral with a cassette ejection arm and operates to urge the ejection arm in a cassette removal direction when the holder carriage is at the cassette insertion and removal position. The fulcrum also urges the ejection arm in the opposite direction when, inserting the cassette, the cassette's front end contacts the ejection arm to turn it, thereby urging the eject arm in the cassette removal direction again when after insertion of the cassette, the holder carriage has been moved to the recording and reproducing position.

Abstract: A method for controlling an automatic sheet connecting and feeding apparatus in which folded sheets, each of which is folded zigzag in the form of a stack of sheets, are conveyed successively by a plurality of conveying means to a processing means. In order to connect the bottom sheet of a first one of the folded sheets to the top sheet of a second folded sheet following the first folded sheet the top sheet is lifted with a suction device. The step of lifting the first folded sheet includes the steps of pushing the suction device against the top sheet to suction and retain the top sheet, moving the suction device in parallel with the surface of the top sheet and moving the suction device in a direction perpendicular to the surface of the top sheet.

Abstract: An optical fiber connector polishing apparatus is disclosed which comprises a polishing element rotated at high speed, a chuck for supporting an optical fiber connector in such a manner that the optical fiber connector is rotatable in a reciprocation mode, a swing arm which holds the chuck to swing the chuck, in a horizontal plane, between a first fixed position and a second fixed position, a positioning unit for positioning the swing arm selectively at the first or second fixed position on the swing locus thereof, a swinging unit for swinging the swing arm in a horizontal plane continuously while the end portion of the optical fiber connector being polished with the polishing element, and a reference member for positioning the end portion of the optical fiber connector at a reference position. The polishing element and the reference member are arranged at the first and second fixed positions of the swing arm, respectively.

Abstract: An apparatus for conically machining an optical fiber connector is disclosed which comprises a grinding wheel rotated at high speed, an optical fiber connector having end portion whose machining end face is confronted with the grinding wheel, and having an optical fiber along the central axis thereof, a supporting member for supporting the optical fiber connector, which supporting member is swingable towards the grinding surface of said grinding wheel, a driver for swinging the supporting member to cause the optical fiber connector to abut against the grinding wheel, a moving unit for linearly moving the grinding wheel along the axis of rotation of the grinding wheel until the machining end face of the optical fiber connector is shifted from the grinding wheel, a reference surface juxtaposed with said grinding wheel, to set said optical fiber connector, and a reciprocating rotation unit for rotating the optical fiber connector in a reciprocation mode through at least 360.degree.