Abstract: A circumferential flow type dynamic pressure bearing 1 is comprised of a shaft 2 having a multiple-arc-shaped pressure generating surface and a circular sleeve 3 fitted on the shaft 2. The shaft or the sleeve is formed with a plurality of proximity portions 4 each of which is close in distance to the surface opposed thereto whereby the support force of gas is generated. A plurality of grooves 5 formed at locations spaced from each other by an angle obtained by dividing the circumference by the number of proximity portions 4 or a divisor thereof. Use of such bearing ensures compatibility with high-humidity environmental conditions by provision of grooves, and at the same time it is capable of eliminating or reducing noise generated by vibration caused by radial deviations of the shaft due to provision of the grooves.

Abstract: A dynamic-pressure gas bearing wherein a rotational shaft is disposed to surround an outer circumference of a stationary shaft or to be surrounded by an inner circumference of a stationary shaft, and a dynamic pressure is generated between the stationary shaft and the rotational shaft through rotation of the rotational shaft, characterized in that a water relief portion is provided. In a dynamic-pressure gas-bearing having a water relief portion, even when the bearing is used in a high-humidity environment or even when water (water vapor) contained in a gas liquefies due to high pressure, a pressure change, or the like, the water relief portion prevents a water film from being formed to thereby prevent an increase in a shear force acting between the stationary shaft and the rotational shaft.

Abstract: A rotary selector switch having a wiper which is arranged on a rotor rotatably held in a cavity formed by a housing and case and is slidingly rotated on the housing base on which are disposed fixed contact elements, thereby to connect electrically at least one of the fixed contact elements to one of the remaining fixed contact elements, in which vertical walls of dovetail portions constituting a ridge projecting from the rotor base are arranged to abut in turn against side walls of ridges extended from an annular ledge arranged at an inner side of the housing corresponding to the rotation of the rotor whereby the rotation of the rotor is stopped; a slot defined in one of the dovetail portions of the ridge arranged on the rotor base is engaged in turn with one of the projections arranged on the housing base corresponding to the rotation of the rotor whereby an audible click may be caught; a slit defined in the housing base between the fixed contact elements disposed thereon aids to cut off a chain of undesirab

Abstract: A variable resistor including terminal leads punched out of a metal plate the end portions of which are arranged to be positioned accurately onto corresponding collector or conductor elements disposed on a base respectively by setting the metal plate at a fixed position, filler elements filling a gap extending between the collector element and the conductor elements and a gap extending between the conductor elements and which prevent an outflow of synthetic resin into the center of a housing during the process of molding the housing and a parallel gap electrode provided with a pair of parallel electrodes which are provided on an unplated surface of the end portions of the lead terminals during the process of welding the terminal leads onto the corresponding collector and the conductive elements respectively.

Abstract: A fishing reel of double-bearing type is provided with a spool shaft on which a spool having a cylinder body is rotatably mounted. The spool shaft has a spool gear mounted on the end thereof and meshable with a drive gear mounted on a handle shaft connected to a handle which is rotatably held by a support.

Abstract: A drive and control circuit for laser diodes includes: a first switching element connected in series to a laser diode connected to a constant-current source for actuating the laser diode when a binary drive signal is at one level thereof; an impedance element connected in parallel to the series circuit of the laser diode and the first switching element, the impedance element being connected to receive the constant-current source together with the laser diode and having impedance characteristics substantially equal to those of the laser diode and the constant-current source; an integrator circuit for integrating the data at the one level; an impedance control circuit for variably controlling the impedance of the impedance element in response to the integrator circuit; and a second switching element connected in series to the impedance element for actuating the impedance element when the drive signal is at the other level.

Abstract: A level winder for double-bearing fishing reel is provided with a spool shaft rotatably arranged on support frames and having a spool gear meshable with a drive gear operable by a handle which is rotatably held by support frames, a traverse cam guide cylinder mounted on a traverse cam through which is extended a traverse cam shaft to one end of which is fitted a traverse cam shaft gear which is meshable with the drive gear, and with a level winder guide arm which is mounted on and rotated with the traverse cam guide cylinder connected to a traverse cam shaft bushing and which is shiftable reciprocally in lateral direction.

Abstract: A DIP rotary code switch provided with a plurality of terminals arranged on a circuit board embedded in a base includes a rotor, conductive patterns disposed, on the bottom surface of the rotor the rotor being rotatably mounted in a cavity formed by a housing and a base, a contact member holder having a center boss on the upper surface thereof which rotatably supports the rotor and having slots extending therethrough and a contact member provided with an apex head fitted respectively into a slot extending through the contact member holder, the apex head intermittently contacting conductive patterns of the rotor when rotated and the contact member having two legs fitted respectively into slits extending in a the base to be electrically connected to conductive elements arranged on the surface of the circuit board embedded in the base.

Abstract: An ultra-wide angle f-.theta. lens system comprising, in the order from the light beam deflector side, a first lens component having positive power, a second lens component having negative power, and a third lens component having positive power, the ultra-wide angle f-.theta. lens system being arranged to have an ultra-wide scanning angle widened to .+-.45.degree. and exhibiting an imaging performance of laser beam waist close to the diffraction limit in spite of the fact that the f-.theta. lens system comprises a small number of lenses.

Abstract: A fishing reel equipped with a motor case in which a motor for driving a spool and a level winder driving mechanism are accommodated.

Abstract: A potentiometer has a case, a housing, a base and a rotor rotatably arranged in the chamber of housing. The housing is provided with a pair of projections on both side walls thereof and two pair of corner projections at four corners thereof respectively while the case has a pair of bent long legs in which holes are defined to receive the side wall projections of the housing and a pair of bent short walls are arranged to cover the top of the housing. The case may be pushed down upon the housing with the pair of bent long legs thereof being slid down into vertical grooves arranged between the corner projections of the housing until the side wall projections of the housing are slidingly snapped into the holes of the case and thus, the case and the housing may be assembled in one operation.

Abstract: A worm gear-actuated variable resistance device including a clutch structure, having a worm gear actuated by a worm screw. The worm gear has a toothless sector, and the teeth are engagable by the thread of the screw to rotate the gear to a position in which the screw opposes the toothless sector. The gear is mounted in a housing having a resistive element and a conductive element fixed thereto. The gear has a resilient finger having a stop member thereon which is slidable in a channel in the housing when the gear rotates.