Abstract: A card-in type shield connector is to be inserted into an electronic device in order to add a memory function to the electronic device. The card-in type shield connector includes a contact element disposed within a flat and thin insulative case into which a memory card can be withdrawably inserted, and a card ejection mechanism disposed within the flat and thin insulative case and adapted to eject the memory card from inside the flat and thin insulative case. An outer surface of the flat and thin insulative case is shielded by a shield plate.

Abstract: A resonator for an ultrasonic bonding apparatus, which comprises an ultrasonic horn having a recessed portion in the exterior surface and a threaded hole, a bonding working portion having a chip base fitted in the recessed portion and a chip body provided on the chip base, and a screw member having a screw portion to fit into the threaded hole and a through-hole through which the chip body is put without contact with said screw member so that the screw member is screwed into the threaded hole, the bonding portion is fixed to the ultrasonic horn, with the chip body projecting through the through-hole for contact with a workpiece.

Abstract: A card-in type connector is to be inserted into an electronic device in order to add a memory function to the electronic device. A contact to be contacted with a memory card is disposed within a thin and flat type insulative case into which the memory card is withdrawably inserted and, a pair of spaced apart, parallel cantilever arms extend forwardly from a distal end of the thin and flat type insulative case. A wiring board is interposed between the cantilever arms and an end portion of the contact is connected to a rear end portion of the wiring board by soldering. A connecting device to be withdrawably inserted into a connecting device on the electronic device side is interposed between front end portions of the cantilever arms, and an end portion of a contact of the connecting device is connected to a front end portion of the wiring board by soldering.

Abstract: An ultrasonic vibration bonding chip mounter includes a chip carrying unit arranged above a chip supply unit, a prealignment unit and a mounting unit which are arranged in a row and having a movable table which can move back and forth in a direction parallel to a direction where these units are arranged, a pick-up unit, attached to the movable table, for transferring a chip from the chip supply unit to the prealignment unit, and an ultrasonic vibration bonding unit, attached to the movable table, for transferring the chip from the prealignment unit to a mounting unit so that the chips are transferred from the chip supply unit to the prealignment unit and further to the mounting unit by the reciprocation of the movable table one by one.

Abstract: A support portion for attaching a horn main body to a solder tank is provided on the horn main body at a nodal point f2 and ultrasonic vibration from an external transducer is transmitted to solder in the solder tank through the horn main body.

Abstract: In a two-stroke internal combustion engine, output power is increased and total hydrocarbon (THC) exhaust is decreased as a result of small structural changes. An exhaust port and scavenging ports are configured and disposed such that they are open in a reduced period of the combustion cycle.

Abstract: First and second boosters are attached to a holder in the following manner to prevent a portion between the first and second boosters from being curved. The outer side surface of a projecting portion on the outer peripheral surface of a second booster is pressed toward the inward of the holder by a stopper attached to the holder so that a stepped portion formed in the interior surface of the holder is pressed by the projecting portion through a bridge member and a projecting portion on the outer peripheral surface of the first booster.

Abstract: Objects of the present invention are to provide a brazeable aluminum alloy cast material which can be manufactured brazeable products without lowering the productivity and the method of brazing a cast material.The cast material is composed of: 0.5-4.5% by weight of Mn; 0.5-3% by weight of Si; 0.5-1% by weight of Fe; and the balance composed of aluminum and impurities. In the method of brazing the cast material, a brazing agent and/or flux are used, the brazing agent is composed of: 25-65% by weight of Zn; 2-7% by weight of Si; and the balance composed of aluminum and 0.1% or less of Fe as one of impurities. The flux is a mixture of: 0.5-5% by weight of LiF; 1-10% by weight of ZnCl.sub.2 ; 1-5% by weight of K.sub..alpha. AlF.sub..alpha.+3 (.alpha. is an integer not less than 1.); and the balance composed of BaCl.sub.2 -KCl-NaCl.

Abstract: A muffler for an internal combustion engine has an expansion chamber (31, 32) into which exhaust gas from the engine is introduced. The expansion chamber has a double wall (32A), with an inner panel (42) of the double wall (32A) having exhaust gas discharge portions (42A, 42B, 42C, 42D) with respective blowout holes (61, 62, 63, 64) for introducing the exhaust gas from the expansion chamber (32) into an air space (Sb) in the double wall (32A). From the air space (Sb), the exhaust gas is vented to the ambient through a discharge hole (37A) in an outer panel (42) of the double wall (32A ). A spark arrester screen (72) covers the discharge hole (37A).

Abstract: In a two-stroke internal combustion engine, total hydrocarbon (THC) exhaust is decreased as a result of small structural changes and without loss of output power. A Schnurle scavenging-type combustion chamber has a hemispherical main surface and an annular skirt-like squish band, and a spark plug is disposed for a spark point to be substantially at the center of the combustion chamber. The squish band has minimized width.

Abstract: A sludge dehydrating agent which is excellent in storage stability and prevented from becoming water-insoluble during storage and hence can be distributed in the market securely by solving the problem of the conventional dehydrating agents comprising amphoteric polymers that they undergo deterioration and become water-insoluble when stored for long, thus becoming substantially unusable. This dehydrating agent comprises a copolymer composed of cationic vinyl monomer units, vinylic carboxylic acid monomer units and nonionic vinyl monomer units and a salt of a group IIA metal of the periodic table. Preferable examples of the vinylic carboxylic acid monomer include acrylic, methacrylic and crotonic acids, while those of the nonionic vinyl monomer include acrylamide and methacrylamide. The metal salts usable herein include those of mineral acids and organic carboxylic acids, and preferable mineral acid salts include calcium chloride, magnesium chloride and magnesium sulfate.

Abstract: A muffler for a two-stroke internal combustion engine has an expansion chamber into which a rush of exhaust gas is introduced from the engine. In the vicinity of an exhaust gas inlet from the engine into the expansion chamber, the muffler has an external air intake for external air to be suctionally introduced into the expansion chamber by the rush of exhaust gas. With the external air introduced, carbon monoxide (CO) emission into the ambient is reduced.

Abstract: To stabilize bonding strength by concentrating bonding energy upon members to be bonded together, when an overlapped interface of a plurality of members to be bonded together is to be bonded by ultrasonic vibration, heaters 6 and 7 are caused to generate heat to heat the bonding working portion 3d of a resonator 2, whereby bonding energy generated by ultrasonic vibration and bonding energy generated by heating are provided to the interface so that bonding energy can be concentrated upon the interface without increasing the energy of ultrasonic vibration and bonding strength can be stabilized. Further, when electric heaters are used as the heaters 6 and 7, operationability is improved. Moreover, when heater holes 3e and 3f are formed in the resonator 2 and electric heaters are fitted into the holes 3e and 3f, heater installation work is facilitated. The heater may be provided in the mount.

Abstract: The fermentation apparatus according to the invention is of a vertically oriented, multistage type comprising one or more fermentation tanks, an outlet port provided at the top of the fermentation tank, a maturation tank disposed below the fermentation tank, and a preliminary fermentation tank disposed below the maturation tank. Each fermentation tank includes a support member rotatable in the circumferential direction, an agitation member removably connected to the support member and including a plurality of agitation blades rotatable in the horizontal direction relative to the bottom surface of the fermentation apparatus, a gas intake device disposed below the agitation member, a transfer opening member for open-close movement, and a filter member provided at the top of the fermentation tank.

Abstract: A card upside-down insertion preventive apparatus comprises a truncated corner portion formed at one end of a leading edge portion of a square card, a card tray disposed in a card insertion chamber communicating with a card inlet port, the card tray having a front abutment member and capable of moving in accordance with insertion of the card, the leading edge of the card being brought into abutment with the front abutment portion when the card is inserted through the card inlet port, a lock claw formed on the card tray, the lock claw being capable of displacing upwardly and downwardly in a direction perpendicular to the card insertion direction, a pressure receiving portion formed on the claw in a region within the truncated corner portion of the card which is in abutment with the front abutment member, the pressure receiving portion causing the lock claw to displace downwardly by being pressed by a non-truncated corner portion formed at the other end of the front edge portion of the card when the card is ins

Abstract: To provide an ultrasonic bonding machine in which a resonator is arranged horizontally or vertically while it is supported at both ends and a resonator for use in the same. The interface Wa is placed on the mount 13 arranged in a stationary state in a lower portion of the working space 2 open in forward, right and left directions, the resonator 7 is moved down by the pressure mechanism 3 from above, and the interface Wa is pressure-held properly between the bonding working portion 11 and the mount 13 while it is in a stationary state and bonded with vibration energy of a vertical ultrasonic wave. The resonator 7 is assembled by interconnecting the ultrasonic horn having the bonding working portion 11 and two boosters having support portions by means of screws in such a manner that they are coaxial with one another, thereby facilitating exchange of each element. In addition, the resonator can be arranged vertically while it is supported at both ends in the front of the main body.

Abstract: A magnetic field generating apparatus for a magnetic resonance imaging (MRI) apparatus, including soft ferrite disposed adjacently to a gradient magnetic field coil which is disposed in a gap and serves to form a static magnetic field. The soft ferrite has saturated magnetic flux density (Rs) more than 0.4 T, coersive force (He) less than 50 A/m, and specific resistance .rho. more than 10.sup.-5 .OMEGA..multidot.cm. The magnetic field generating apparatus thus constructed has a magnetic circuit arrangement that a pair of permanent magnetic bodies which are disposed so as to confront each other and define the gap are magnetically connected through a yoke, and pole pieces are fixedly secured to the surfaces of the respective permanent magnetic bodies facing the gap, thereby generating the magnetic field in the gap.