Abstract: A handler includes a table which supports an electronic device, a socket which is arranged to face the table, and a transport mechanism which transports the electronic device. The transport mechanism includes a contact head having a lead press with a recess for storing the electronic device, and a chuck sleeve which extends through the lead press, is arranged relatively movable from the lead press in a direction in which the chuck sleeve extends, and chucks the electronic device, an elevating mechanism which moves the contact head between the table and the socket, a pivot mechanism which pivots the contact head within the vertical plane, and a control unit which controls chucking and release of the electronic device by the chuck sleeve, and vertical movement and pivot of the contact head.

Abstract: A handler includes a table which supports an electronic device, a socket which is arranged to face the table, and a transport mechanism which transports the electronic device. The transport mechanism includes a contact head having a lead press with a recess for storing the electronic device, and a chuck sleeve which extends through the lead press, is arranged relatively movable from the lead press in a direction in which the chuck sleeve extends, and chucks the electronic device, an elevating mechanism which moves the contact head between the table and the socket, a pivot mechanism which pivots the contact head within the vertical plane, and a control unit which controls chucking and release of the electronic device by the chuck sleeve, and vertical movement and pivot of the contact head.

Abstract: To improve operativity, a pushing device for a tooth restoration material mixed and kneaded in a capsule comprises a compression coil spring 4 provided between a leak preventive cover 2 contacted with a capsule and having a cylindrical piston rod 1 inserted, and a ratchet body 3 having a rack part 3cb and fixed to the piston rod 1; a housing body 5 having a supporting path 5b inserted in the leak preventive cover 2 and a guiding path 5c provided with the ratchet body 3 movably; a ratchet body locking plate spring 6 for preventing move of the ratchet body 3; a lever 7 for moving the rack part 3cb and returning the lever body 7a to an initial position; a release body 8 for canceling the locking to the rack part 3cb; and a stopper means 9 for stopping the ratchet body 3 at the initial position.

Abstract: To improve operativity, a pushing device for a tooth restoration material mixed and kneaded in a capsule comprises a compression coil spring 4 provided between a leak preventive cover 2 contacted with a capsule and having a cylindrical piston rod 1 inserted, and a ratchet body 3 having a rack part 3cb and fixed to the piston rod 1; a housing body 5 having a supporting path 5b inserted in the leak preventive cover 2 and a guiding path 5c provided with the ratchet body 3 movably; a ratchet body locking plate spring 6 for preventing move of the ratchet body 3; a lever 7 for moving the rack part 3cb and returning the lever body 7a to an initial position; a release body 8 for canceling the locking to the rack part 3cb; and a stopper means 9 for stopping the ratchet body 3 at the initial position.

Abstract: A mixer for capsule for dental restoration material to mix a powder component and a liquid component within a mixing compartment of a capsule having an air-permeable filter without passing the powder and liquid components placed in a site connecting the inside of the mixing compartment to the outside into a mixture without air bubbles quietly, quickly and efficiently, includes a capsule holding compartment for holding the capsule such that the air within the mixing compartment can be discharged out from the air-permeable filter, a rotating unit of capsule holding compartment for subjecting the capsule holding compartment itself to a circular motion in the state that the longitudinal direction of the capsule holding compartment is kept in a constant direction, a driving unit for driving the rotating unit of capsule holding compartment, and a vacuum device connected to the capsule holding compartment.

Abstract: A mixer for capsule for dental restoration material to mix a powder component and a liquid component within a mixing compartment of a capsule having an air-permeable filter without passing the powder t and liquid components placed in a site connecting the inside of the mixing compartment to the outside into a mixture without air bubbles quietly, guickly and efficiently, is constituted of a capsule holding compartment for holding the capsule such that the air within the mixing compartment can be discharged out from the air-permeable filter, a rotating unit of capsule holding compartment for subjecting the capsule holding compartment itself to a circular motion in the state that the longitudinal direction of the capsule holding compartment is kept in a constant direction, a driving unit for driving the rotating unit of capsule holding compartment, and a vacuum device connected to the capsule holding compartment.

Abstract: A sealed neutron tube is provided, in which an insulating structure is designed to be solid to enhance the shock-proof performance thereof, an ion beam drawn out from an ion source is pulsated more rapidly, and the lifetime of a target is increased without substantially increasing the filling amount of the Tritium. The sealed neutron tube (1) includes a metal housing (20), an ion source (5) disposed and sealed within the metal housing for ionizing a Deuterium gas, an accelerating electrode (4) charged with a high voltage, disposed and sealed within the metal housing and facing the ion source, and a target (3) disposed within the accelerating electrode and absorbing Tritium and the like therein. An outer wall (20) is constructed by a metal housing, and a ceramic insulating member (11) is disposed within the metal housing. Since the accelerating electrode is held by this insulating member, the outer wall of the sealed neutron tube has enhanced shock-proof performance.

Abstract: A communication control system arranged between a plurality of terminal apparatuses and a host processing unit in order to transmit and receive signals based on an NRZI coding system between them by way of a half duplex communication system, a "0" bit detecting circuit for detecting the "0" bit of a one-bit length is provided in the communication control system and the sending and receiving modes are automatically switched in accordance with the output of this detecting circuit.

Abstract: A process for separation of methacrylic acid from a methacrylic acid-containing, gaseous reaction mixture obtained by subjecting methacrolein or a compound which can afford methacrolein under reaction conditions and molecular oxygen to gas phase reaction in the presence of a catalyst for oxidation under the coexistence of an inert gas for dilution which comprises (a) cooling the gaseous reaction mixture from a reactor wherein the gas phase reaction has been effected to separate into condensable components including methacrylic acid, acetic acid and water vapor as a condensed liquor and non-condensable components including methacrolein as a non-condensed gaseous mixture, (b) eliminating contaminating methacrolein from the condensed liquor and (c) contacting the resulting condensed liquor with an organic solvent to extract methacrylic acid, followed by separation into an organic solvent solution including methacrylic acid and an aqueous solution as waste water, characterized in that (1) the inert gas for diluti

Abstract: A screw inspection device of the invention has a screw transfer mechanism for transferring a screw through a predetermined transfer path, a sensor for performing predetermined measurements of the screw during transfer thereof, a timing signal transmitter for generating a timing signal every time the screw reaches the sensor, a comparator for generating an acceptance/non-acceptance signal representing the measurement results from the sensor every time the timing signal is received, a sorting signal generator for generating a sorting signal corresponding to the acceptance/non-acceptance signal when the corresponding screw reaches the end of the transfer path, and a sorter for classifying the screws into defective and nondefective screws.

Abstract: In a process for the separation of elements by chromatography in which a front zone and a rear zone are present in front of and in rear of an adsorption band of elements, a high column efficiency can be attained by developing the adsorption band of elements without causing the entry of a main eluent having a relatively high concentration into the front zone. According to the present invention, elements can be separated into individual species not only in a high state of purity but also in a high state of concentration, so that the productivity of elements may be extremely increased as compared with that of conventional methods. In addition, according to the present invention, the amount of eluent employed is remarkably small as compared with that in conventional methods. Therefore, the present invention is very advantageous for the separation of elements from an industrial standpoint.

Abstract: An aqueous high concentration solution of tert-butyl alcohol can be produced with high conversion and high selectivity by using a material composition having special proportions of tert-butyl alcohol, water and isobutylene or an isobutylene-containing hydrocarbon mixture and reacting isobutylene with water in the presence of a cation exchange resin having sulfonic acid groups preferably in multi-stage reactors and separating inert hydrocarbons and unreacted isobutylene from the reaction solution in a distillation column.

Abstract: An electrically powered torque-controlled tool having an electric motor which rotates a bit, whereby a screw, bolt or nut fitted at the front end of the bit is tightened. The tool is designed so that when the tightening force exerted by the bit reaches a preset torque, the driving by the electric motor is stopped by opening the switch and concurrently therewith a clutch interposed between the electric motor and the bit is disengaged and held in this released state, thereby avoiding the reaction which would otherwise be produced by the motor inertia immediately after the tightening, thus achieving a high-precision tightening operation.

Abstract: A process for purifying crude acrylic acid characterized in that high-purity purified acrylic acid containing little or no low boiling aldehydes is obtained by rectifying a crude acrylic acid consisting essentially of acrylic acid and containing low boiling substances such as acetaldehyde, acrolein, water and acetic acid and/or high boiling substances such as maleic acid, phenol, benzaldehyde and acrylic acid dimer, thereby removing said low boiling substances and then high boiling ones, and then stripping trace amounts of remaining low boiling aldehydes with an inert gas such as nitrogen or air at a liquid to gas molar ratio of 2 to 20.

Abstract: An automatic thread winding apparatus for automatically winding thread on a plurality of double-flanged bobbins of a type for use in sewing machines. The apparatus includes a bobbin supply unit for supplying bobbins in an arbitrary manner and in a row onto a thread winding unit. The bobbins in a row are successively transferred, one at a time, to the thread winding unit by a shuttling mechanism. Thread winding takes place while each one of the empty bobbins are firmly held between a tailstock and a headstock. The bobbin after having been wound with a predetermined quantity of thread is subsequently doffed onto a temporary storage mechanism wherein cutting of a portion of the thread extending between the filled bobbin and the temporary storage mechanism takes place. All of these processes are timed and sequentially performed by various cam mechanisms.

Abstract: A method for extraction of acrylic acid and/or methacrylic acid from a solution containing the same by treating the said solution with an organic solvent, which is characterized by using a mixture of methylethylketone and a xylene as the organic solvent. By such method, the extraction of acrylic acid and/or methacrylic acid is accomplished efficiently and economically.