Abstract: A heat resistant resin composition comprising (a) a polyamide-imide resin and (b) a thermosetting resin component, said composition giving a cured product having a storage elastic modulus at 300.degree. C. of 30 MPa or more, provides an adhesive sheet showing excellent solder heat resistance.

Abstract: A method and apparatus for analyzing a DO-statement to determine the type of a DO-variable and for determining whether a sign of an incrementation parameter at the time of compile can be determined are provided in a DO-loop object code generator in a compiler to select an object code generating method corresponding to the state of the DO-loop. As a result, object codes fitted to each DO-loop are generated which are so efficient as to improve the iteration count according to the ANSI standard, saving of use of registers, elimination of unnecessary calculation and the like.

Abstract: A catalyst selected from a perfluorosulfonic acid and an anhydride thereof enables a non-conjugated drying oil to react with a phenol to form a phenol-added vegetable oil without causing hydrolysis of the non-conjugated drying oil. The phenol-added vegetable oil is allowed to react with an aldehyde to form a vegetable oil-modified phenolic resin. A laminate produced by impregnating paper with the vegetable oil-modified phenolic resin and laminating and molding the impregnated paper is excellent in low temperature punching quality and electrical properties and is free from low molecular weight components oozing out the surface of the laminate.

Abstract: Disclosed is a dialing apparatus used for a power failure extension telephone set 30 in a key telephone system. The power failure extension telephone set 30 is driven by power supplied from a key service unit 2 so as to function as an extension telephone set when power is supplied to the key service unit 2, but directly connected to an office telephone line 1 so as to function as an individual telephone set when power is not supplied to the key service unit 2. The dialing apparatus comprises a dial switch 31 of single contact-layer structure and a control switch circuit 21 connected to the dial switch 31 and changed over according to the power supply or power failure condition of the key service unit. That is, when power is supplied to the key service unit 2, the control switch circuit 21 connects the dial switch 31 to a control circuit 19.

Abstract: A talker speech level control circuit for controlling the level of an electric signal converted from a talker speech, includes an acoustic-electric conversion element for converting an acoustic input signal into an electric signal; a talker speech level detection circuit for detecting whether or not the speech level of an output signal from the conversion element is within an area representing a need for speech level control; and a talker speech level adjustment circuit responsive to a signal detected by the talker speech level detection circuit for controlling the electric signal level in accordance with the detected area within which the talker speech level falls.

Abstract: A system allowing selective connection of various types of external apparatuses to a telephone set, which system comprises a plurality of switching circuits connected to the external apparatuses and a plurality of external apparatus interface circuit having mutually different characteristics and connected through the plurality of switching circuits to the external apparatuses, wherein any one of these switching circuits is turned on and at the same time the other circuits are turned off to selectively connect one of the interface circuits to one of the external apparatuses.

Abstract: A loud-speaker telephone set includes a switching control circuit to attenuate the incoming signal, during transmission, and to attenuate the outgoing signal, during reception, in order to prevent feedback from the loud-speaker to the microphone. An automatic gain control circuit is added which detects at least one of the incoming signal level and the outgoing signal level and which adjusts the attenuation of both the incoming and outgoing signals so as to reduce the attenuation change between reception and transmission below 20 dB and eliminate the unpleasant sensation, to a user, of large attenuation changes.

Abstract: A variable delivery hydraulic pump having at least one pilot plunger, an operating plunger for adjusting the displacement of variable control element, and a first and a second spool for controlling travels of the plungers towards the variable control element side so that a single pumping element may precisely, stably carry out the two pressure-two volume control of the pump.

Abstract: A process for the preparation of polyesters by reacting a di-lower alkyl ester of a dicarboxylic acid consisting mainly of terephthalic acid with an alkylene glycol consisting mainly of ethylene glycol or tetramethylene glycol and thereafter polycondensing an obtained di-glycol ester of the dicarboxylic acid and/or a low molecular weight condensate thereof, in the presence of (A) a lower alkyl p-formylbenzoate in an amount of about 50 - 1000 ppm, (B) a di-lower alkyl isophthalate in an amount of about 50 - 1000 ppm and (C) p-toluic acid and/or a mono-lower alkyl terephthalate in an amount of more than about 30 ppm, wherein the total amount of the compounds (A), (B) and (C) is not more than about 2000 ppm, to thereby form polyesters which have good qualities and excellent melt-forming properties.

Abstract: A variable delivery hydraulic pump having at least one pilot plunger, an operating plunger for adjusting the displacement of variable control element, and a first and a second spool for controlling travels of the plungers towards the variable control element side so that a single pumping element may precisely, stably carry out the two pressure-two volume control of the pump.

Abstract: An axial piston power transmission of which a housing is provided with a protruded portion extending from the inner surface toward the outer periphery of a cylinder barrel and the maximum flow velocity of drain is generated between the protruded portion and the outer periphery of the cylinder barrel so that renewal of drain may be stimulated, simultaneously a cooling effect with respect to all sliding surfaces within the housing may be improved and also the variational characteristc may be held constant by making a thrust plate variable in an angle of inclination thereof.

Abstract: A variable display hydraulic pump having at least one pilot plunger, an operating plunger for adjusting the displacement of variable control element, and a first and a second spool for controlling travels of the plungers towards the variable control element side so that a single pumping element may precisely, stably carry out the two pressure-two volume control of the pump.