Abstract: A photopolymerizable composition comprising (1) an addition-polymerizable compound having at least one ethylenically unsaturated double bond and (2) a photopolymerization initiator as essential components, the improvement which comprises the photopolymerization initiator comprising a combination of (a) a 5-isoxazolone represented by the general formula (1) and (b) an aromatic carbonyl compound, a dialkylamino aromatic carbonyl compound represented by any of formulae (2) to (5), a compound represented by the formula (6) or 2-(.alpha.-thioxophenetylidene)-3-methylnaphtho[1,2-d][1,3]-thiazoline: ##STR1## wherein in the formula (1), A.sup.1 and A.sup.2 each represent an alkyl group, an alkylcarbonyl group, an alkoxycarbonyl group, an aryl group, an arylcarbonyl group or a hydrogen atom and may be the same or different; in the formulae (2) to (5) R.sup.1 and R.sup.2 each represent an alkyl group and may be the same or different, R.sup.

Abstract: Carbostyril compounds represented by the formula (I) ##STR1## wherein R.sub.1 represents a hydrogen atom, an alkyl group or a phenylalkyl group, R.sub.2 represents an alkenyl group, an alkoxyalkyl group, a hydroxyalkyl group, a carboxyalkyl group, an alkylcarbonyl group, a cycloalkylcarbonyl group, an alkylcarbonylalkyl group, an alkoxycarbonylalkyl group, an alkynyl group or a carbamoylalkyl group, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxyalkyl group, an alkenyl group, a phenylalkyl group, a phenoxyalkyl group or a phenyl group, and the 3,4-bond of the carbostyril nucleus represents a single or double bond, pharmaceutically acceptable salts thereof, and a process for preparing the same.

Abstract: In a focus servo apparatus for an optical type information read-out system having a light source, a condenser lens for focusing light from the light source on a recording surface of a recording medium and for focusing light reflected by the surface and containing the information recorded on the surface, a cylindrical lens for passing the reflected light, a light receiving element responsive to the reflected light from the cylindrical lens for providing an output and a driving device responsive to the output for regulating the position of the condenser lens relative to the surface, the cylindrical lens has its main, or primary, principal point substantially at the focusing point of the condenser lens for the reflected light and the physical axis of the cylindrical lens makes an angle of about 45.degree. with respect to the moving direction of the recording medium.

Abstract: A device for controlling an agricultural implement mounted on a tractor includes an auxiliary hydraulic jack which exerts a force on a resiliently flexible bar sufficient to limit the deformation of the bar due to reaction forces, when the implement is in use in a ground-engaging position, thereby acting, through a transmission linkage, on a movable control member of an hydaulic distributor to urge the member into its rest position and return the implement rapidly to its lowered position to achieve an even working of the ground. An adjustable throttle valve meters the operation of the auxiliary jack to maintain a desired working characteristic.

Abstract: A gas detector including a gas sensitive element that provides an electrical resistance which varies with the type of gas detected and lead wires for conducting the electrical signal from the gas sensitive element. A porcelain tube supports the gas sensitive element the lower part of which is positioned within a slot in the tube. Through holes in the tube receive the lead wires. A housing encloses the tube. Only the upper part of said gas sensitive element which is not positioned within the tube is provided with electrodes.

Abstract: A thermionic cathode includes an electron emitting tip, lanthanum hexaboride tip supporting heaters in close contact with both sides of the tip and supporting the tip, and elastic electroconductive members in pressure contact with outer surfaces of the tip supporting heaters for supplying electric current. The tip supporting heaters are obtained by cutting lanthanum hexaboride having high anisotropy due to its layered structure so as to form a pair of parallel planes perpendicular to a pressing direction when hot-pressed, and abrade-polishing the parallel planes. The tip supporting heaters are brought into close contact with the tip and the elastic electroconductive members at the resulting smooth surfaces thereof. The apparatus of the invention has a prolonged lifetime and high efficiency.

Abstract: A device for developing a neutralization signal for an echo suppressor is required for the transmission of data over a telephone line having four-wire circuits. Each transmission of data is preceded by an identification signal at a given frequency. An input analog signal including the identification is sampled and quantized so that each sampled value is encoded into a binary codeword composed of a sign bit and a preset number of bits representing the magnitude of the analog signal. The device includes a detecting circuit to detect the identification signal, a level assessing circuit to assess the level of the codeword sequence, and a hangover circuit responsive to the detecting circuit and the level assessing circuit to develop the neutralization signal. The detecting circuit includes a bit pattern generator which produces successive bit patterns from sign bits of the codeword sequence.

Abstract: Apparatus for treating a metal workpiece includes a laser radiation generator arranged to generate and focus a laser beam onto a workpiece, and a part-spherical mirror so positioned as to refocus onto said workpiece the radiation reflected therefrom. The provision of the mirror increases the percentage of the laser radiation energy absorbed by the workpiece.

Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, said photographic light-sensitive material containing at least one cyan color-forming coupler represented by the following general formula (I): ##STR1## wherein l represents 0, 1 or 2; X represents a group capable of being released upon the coupling reaction and having at least 6 carbon atoms; Y represents RCONH--, RNHCO-- or RNHCONH-- wherein R represents a hydrogen atom, a methyl group, an ethyl group or a methyl group substituted with one or more halogen atoms; n represents 1 or 2 and Y may be the same or different when n is 2; and the phenyl group can be substituted with a halogen atom, an alkyl group having 1 to 3 carbon atoms or an alkoxy group having 1 to 3 carbon atoms. The dyes formed from the cyan color-forming couplers have unusually good spectral absorption properties and exceptional fastness to light and heat.

Abstract: A common memory is used for asynchronous interleaved read and write operations. TDMA data compression and expansion is performed without ping-pong memories and elastic buffering is also possible. A buffer reset method is used to automatically slip a fixed number of bits in response to excessive phase shift between the read and write clock.

Abstract: A power amplifier having first and second amplifiers each including an output stage consisting of series connections of collector-emitter paths of first and second output transistors connected between power supply terminals is disclosed. Each first and second transistor is driven alternately in response to an input signal fed through an input terminal, and each output transistor is provided with an over-current detector circuit. Protective circuits are responsive to the detection outputs of the detector circuits to protect the corresponding output transistors. The output terminals of the power amplifier are respectively connected to the common junction of the first and second output transistors of the first and second amplifiers, and a load such as a speaker is connected between the output terminals. Circuits are provided to apply the outputs of the over-current detector circuits in one amplifier to the corresponding protective circuits in the other amplifier, and vice versa.

Abstract: A focus servo apparatus for an optical information reading system is disclosed, which includes an optical system for a light from an information carrying surface of a recording medium composed of a condenser lens, a cylindrical lens and a light receiving element. A subsystem is employed for maintaining light illuminating focussed on the information carrying surface in response to an output of the light receiving element. The distance between the cylindrical lens and the light receiving element is larger than the focus distance of the lenticular lens.

Abstract: An elevator traction machine including a main rope, a traction sheave, a DC motor controlled by a thyristor Leonard system, a brake wheel, bearings of motor shaft and a machine beam.The motor shaft is grounded through first grounding circuit including a current collector for the shaft current induced by the switching operation of the thyristor, and through second grounding circuit including the bearings. The second grounding circuit includes a resistor to substantially prevent the flow of the shaft current through the bearings and to protect the bearings from the electrolytic corrosion.

Abstract: A video format signal recording and reproducing device in which an identification signal is inserted into each frame of the video format signal for identifying whether the corresponding data is video or audio data. The identification signal may further be capable of indicating whether corresponding video data is still picture data or motion picture data. In this case, the identification signal may be implemented as a color burst signal with the number of cycles within the burst set in accordance with whether the corresponding video data is still picture or motion picture data. The color burst signal is also inserted in each frame containing audio data so that there is no loss of color synchronization when audio frame data is being read from the recording medium.

Abstract: An apparatus for near infrared quantitative analysis with an infrared emitting diode (IRED) source utilizes narrow bandpass filters and silicon detectors to provide highly accurate and inexpensive measurement. A narrow bandpass filter in the light path of the IRED passes wavelengths outside the half power bandwidth points of the IRED. A silicon detector together with a sensitive amplifier is used to accurately measure linearly up to six decades of light sensitivity at desired wavelengths.

Abstract: A focus lens protecting and in-focus detecting device has light receiving circuit and a comparator for comparing the output of said light receiving elements with a reference potential. A switch network is controlled by the output of the comparator to supply signals to a focus control amplifier from the light receiving circuit.

Abstract: Color decoding device for signals emitted by an NTSC source for the purpose of coding in any system, characterized by the use of a shifter operating at a reference frequency receiving signals in series and transmitting 4 parallel bits to a carrier which samples them at a frequency equal to one fourth of the reference frequency. The signals and their complements produced by the sampler are transmitted to a display device through a matrix of interchangeable resistors. The invention applies to all coding systems, especially SECAM, and in particular to the SECAM display of signals emitted by NTSC computers.