Abstract: Crystals of 7.beta.-[(Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-methoxyiminoacetamido]-3- (1-imidazo[1,2-b]pyridazinium)methyl-3-cephem-4-carboxylate hydrochloride or a solvate thereof, which are stable and improved in solubility in water, are useable for an excellent antibacterial agent.

Abstract: A thermoplastic resin composition having superior processability and impact strength has:(A) 100 parts by weight of a composition comprising 95-5 % by weight of a polyphenylene ether obtained by oxidation polymerization of at least one phenol compound represented by the following formula: ##STR1## (wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 which may be identical or different, each represents a hydrogen atom, a halogen atom, a hydrocarbon group or a substituted hydrocarbon group and at elast one of them is a hydrogen atom) and 5-95 % by weight of a thermoplastic polyester, and(B) 0.01-10 parts by weight of an amino resin obtained by modifying, with an alcohol, an addition reaction product of formaldehyde and at least one compound selected from the group consisting of melamine, guanamine and urea.

Abstract: A controlling apparatus for a laser diode which is used in a laser printer or the like to transmit laser beam light rays. According to the output characteristics of the laser diode, a bias is applied in the current region (from 0 to Ixm) of approximately 0 in radiation output. The control object period (from Ix to Ixm) is divided into many stages to perform the radiation output control so as to effect the high-precision output control without the provision of a more complicated circuit. The central processing unit outputs the control signal into the duty controlling means, so that the output of the laser diode may be automatically held constant in accordance with the predetermined process or the operation arranged in advance.

Abstract: A method of producing (S)-glyceraldehyde acetonide, which comprises reacting 3,4-O-isopropylidene-L-threonic acid or a salt thereof with hypochlorite ion or hypochlorous acid under an acid condition. Also a method of producing (S)-glyceraldehyde acetonide, which comprises reacting 5,6-O-isopropylidene-L-ascorbic acid or a salt thereof with an oxidizing agent to produce 3,4-O-isopropylidene-L-threonic acid or a salt thereof and then reacting the 3,4-O-isopropylidene-L-threonic acid or a salt thereof with hypochlorite ion or hypochlorous acid under an acid condition.

Abstract: A heald assembly of a loom, comprises a heald frame including two beam members which are formed with respective two inner faces which face to each other; two straight elongated openings formed respectively in the two beam members; two straight elongated slits formed respectively on the two inner faces of the heald frame beam members and merging respectively in the two straight elongated openings; a plurality of healds each having a heald body, and two installation sections secured respectively at the opposite end portions of the heald body, each heald installation section being located within the elongated opening and larger in width than the elongated slit; and a device for maintaining a damping-contact between each heald installation section and the heald frame beam member, thereby achieving weight and noise reduction of the heald assembly while maintaining secure connection between each heald and the heald frame.

Abstract: A weft picking device for an air jet type weaving loom, is provided with a weft inserting nozzle which is formed with a high pressure air ejecting passage, and a low pressure air ejecting passage, so that a weft yarn introduced into the nozzle is inserted through the shed of warp yarns under cooperation of the high and low pressure air in order to save required energy for operating the weaving loom.

Abstract: An exhaust gas purification system for internal combustion engines comprising two exhaust gas passages which are substantially equal in length and each of which has a substantially constant cross-section. A thermal reactor communicates with the exhaust gas passages, and a collector is provided on the open ends of the exhaust gas passages. Since the ignition timing of every cylinder is different from each other, the mass of exhaust gases and the mass of secondary air are ejected from the exhaust passages in different phases. The collector is formed to collect and mix the mass of exhaust gases and the mass of secondary air which are ejected from both of the exhaust gas passages at a different time, and has an outlet for discharging the exhaust gases and the secondary air into the chamber of the thermal reactor with mixing thereof.

Abstract: An apparatus for selectively inserting weft yarns of different natures, particularly colors, into the shed of a weaving loom. The apparatus has at least two weft shooting members each movable into a position ready to shoot the pick of weft yarn into the shed. Weft selector cam means having various conditions each operative to hold each weft shooting member in the above mentioned position thereof, are provided. Cam actuating means drive the cam means between the above mentioned conditions thereof, weft selector signal supply means store signals representative of a predetermined weft inserting schedule, and locking means are responsive to the signals for locking the cam actuating means in a condition inoperative to drive the cam means in response to one of the signals and releasing the cam actuating means from such a condition in response to another signal.

Abstract: An apparatus for selectively inserting into the shed of a weaving loom a plurality of weft yarns having different natures, particularly colors, comprising cam means including at least one cam which is formed with lobe and bottom portions alternately arranged about the axis of rotation of the cam and which is driven to turn about the axis through a predetermined angle under the control of weft selector signal supply means such as a pattern card arrangement, wherein cam retaining means is provided to hold the cam in one of the angular positions operative to have each of the weft shooting members held in a position ready to insert the pick of weft yarn into the shed, the retaining means being disengaged from the cam when the cam is being rotated from one of the angular positions thereof into another.

Abstract: An apparatus for selectively detaining and releasing a plurality of weft yarns of different natures, typically colors, before a weft yarn is drawn off into the shed of warp yarns in a weaving loom, comprising lever actuated weft pinch-off units each having a condition to retain each of the weft yarns and a condition to release the weft yarn, a weft selector mechanism including lever actuating means for moving each of the levers associated with the pinch-off units and cam means for moving the lever actuating means between positions respectively operable on the levers for the individual pinch-off units, and a weft release control mechanism driven in synchronism with other driven members and units of the loom for driving the lever actuating means alternately between positions in which the lever engaged by the actuating means is operative to hold the associated pinch-off unit in the above-mentioned conditions thereof.

Abstract: In a weaving loom of the type having program controlled weft selector means, a weft-yarn drawing-off and length-measuring apparatus comprising a detachable length-measuring roller. A pressing roller is in rolling contact with the length-measuring roller and movable relative to the length-measuring roller such as when the length-measuring roller is to be replaced with another roller having a different diameter. A roller guide mechanism including a parallelogrammic four-bar linkage contains the pressing roller to move in an arc. A weft guide mechanism is provided and is operative to move a weft yarn into and out of a position passable between the rollers. A control mechanism operated by the weft selector means drives the weft guide mechanism into and out of a condition providing the aforesaid position of the weft yarn.

Abstract: An internal combustion gasoline engine comprises a determined region which is so formed in an exhaust passage from an exhaust valve to a thermal reactor as to pass exhaust gases therethrough in their discharging order, a secondary air passage with a check valve means communicating with the exhaust port near the exhaust valve, and means for maintaining the temperature of exhaust gases over the trigger temperature of the thermal reactor. The exhaust passage has a volume equal to or more than the displacement of the engine and less than four times the displacement volume and has a cross-sectional area less than three times the opening area of the exhaust valve.

Abstract: Improvements are made in a weft yarn drawing and measuring device for a weaving loom in which a weft yarn to be picked into a shed of the loom is drawn off to a predetermined length by means of measuring and pressing rollers driven for rotation about horizontal axis. The pressing roller is constantly driven at a circumferential speed equal to the circumferential speed of rotation of the measuring roller and is movable between a position disengaged from the measuring roller for allowing the leading end of the weft yarn to rest on the measuring roller and a position in rolling contact with the measuring roller for drawing off the yarn gripped between the two rollers. The device is characterized by self-adjustable torque transmission means capable of transmitting a driving torque to the pressing roller and having an allowance for the movement of the pressing roller between the two relative positions thereof to the measuring roller.

Abstract: The valve-overlapping period of a spark ignition type, four stroke internal combustion engine extends within the range of 60.degree. to 90.degree. of crank angle with the valve overlapping period being generally equally divided to each side of the piston top dead center so that the pressure differential between the exhaust gas passage of the engine and the fuel and air intake passage causes the exhaust gas to counterflow from the exhaust gas passage to the combustion chamber and into the intake passage of the engine with the suction effect of piston descent being negligible when the piston is in the vicinity of top dead center.