Abstract: A photoconductor for electrophotography includes a photosensitive film containing a bisazo charge generation agent described by structural formula (I) and from 100 nmol to 40 mmol, preferably from 500 nmol to 20 mmol, of a compound described by a structural formula (II) with respect to 1 mol of the bisazo charge generation agent. Such a photoconductor for electrophotography minimizes visual defects and image nonuniformity.

Abstract: An electrophotographic photoconductor includes a phosphinate additive in a photosensitive film that improves the stability of the coating liquid for the photosensitive film. The electrophotographic photoconductor includes an electrically conductive substrate and a photosensitive film on the substrate. The photosensitive film contains a charge generation agent and a phosphinate compound. The photoconductor may be of either a monolayer or a laminate construction. In the case of a laminate type photoconductor, the phosphinate compound is incorporated into the charge transport layer. A method of making an electrophotographic photoconductor adds a phosphinate additive to the coating liquid for a photosensitive film to improve stability of the coating liquid. The method involves producing a coating liquid containing a phosphinate compound and coating a conductive substrate with the coating liquid to form a photosensitive film.

Abstract: In a demodulating device which comprises an orthogonal transforming circuit, an up-converting circuit, a pulse signal producing circuit, and a low-pass filter, the orthogonal transforming circuit orthogonally transforms a received frequency shift keying signal to produce a first base band signal and a second base band signal. A phase converting circuit converts a clock signal from a clock signal producing circuit to produce a first clock signal having a first phase and a second clock signal having a second phase. A first EXOR circuit receives the first base band signal and the first clock signal to produce a first EXOR output signal. A second EXOR circuit receives the second base band signal and the second clock signal to produce a second EXOR output signal. A mixing circuit mixes the first EXOR output signal and the second EXOR output signal to produce and supply an up-converted signal to the pulse signal producing circuit.

Abstract: A multivalued FSK demodulation window comparator includes an MSB comparator, an LSB comparator, a reception electric field strength detector, and a reference voltage generating circuit. The MSB comparator determines at least the polarity of a frequency shift of a radio frequency. The LSB comparator determines the absolute value of the frequency shift of the radio frequency. The reception electric field strength detector detects the strength of a radio signal and outputs a signal corresponding to the detected strength. The reference voltage generating circuit changes the reference voltages of the LSB comparator in accordance with an output voltage from the reception electric field strength detector. When the output voltage from the reception electric field strength detector is not higher than a predetermined level, a reference voltage from the reference voltage generating circuit changes.

Abstract: The invention discloses a method for determining the inner diameter of the hollow portion of a laminate and is intended to design a laminated rubber support having an appropriate shape.

Abstract: A shakeproof bearing or an earthquake-proofing structure (10) comprises a columnar bearing body (13) and a surrounding high damping elastomer (14). The bearing body (13) includes a stack of rigid plates (12) and elastic plates (11) alternating with one another. The high damping elastomer (14) may be shaped into an annular cylinder or, alternatively, may be in the form of a columnar stack of alternating annular rigid plates (18) and annular high-damping-elastomer plates (17).

Abstract: This invention is intended to provide a vibration damping device having a high degree of freedom of design of damping performance. This device includes rolling bodies (4) interposed between an upper structure (1) and a lower structure (2) to horizontally swingably support the upper structure (1) and elastomeric members (5) disposed between the rolling bodies (4) and the upper and lower structures (1, 2). In this device, rolling surfaces for the rolling bodies (4) are formed by elastomeric members (5) and rigid members (6). For example, the elastomeric and rigid members (5, 6) are disposed respectively in association with the opposite end regions and central regions of the rolling bodies (4). The elastomeric members (5) may be made of any desired material provided that it has viscoelasticty and the rigid member 6 may be made of any desired material provided that the rolling friction of the rolling bodies (4) thereon differs from that on the elastomeric members (5).

Abstract: The present invention provides a shock absorbing structure made of a rubber-like elastic material having a hardness in the range of 5 to 60, according to a JIS-A type hardness meter and being composed of a base and a plurality of ridges or projections spaced apart in parallel on said base. The shock absorbing structure according to the present invention is suitable as a shock absorbing material, especially, for shoes.

Abstract: A laminated rubber bearing comprising a columnar-shaped viscoelastic body 5, a plurality of viscoelastic members 4, and an external binding body 1 disposed in the periphery of these components. The external binding body 1 is a laminated body consisting of alternating rigid plates 3 and rubber-like elastic plates 2 with rubber-like elastic plates 2 disposed between external peripheral regions of the rigid plates 3. The viscoelastic members 4 are disposed inside of those rubber-like elastic plates 2 of the external binding body 1 so that the viscoelastic members 4 fill up clearance between the rigid plates 3 inside of respective rubber-like elastic plates 2. A cylindrical cavity 6 open at both ends thereof extends through the viscoelastic members 4 and the rigid plates 3. A viscoelastic body 5, an elastic body, or viscous substance having cubage greater than that of the cylindrical cavity 6 is forcedly inserted in the cylindrical cavity 6.

Abstract: The present invention relates to a vibration-proofing device which supports an upper structure, such as a building, computers and other machines or a floor having such machines mounted thereon, on a lower structure, as a foundation, to allow the upper structure to swing, thereby isolating earthquakes, traffic vibrations and vibrations from the equipment installed in another room so as to protect the upper structure from vibrations. The invention is to provide a bearing type of vibration-proofing device which is simple in construction and capable of reliably absorbing not only horizontal but also vertical components of earthquakes, traffic vibrations and other vibrations, whether they are weak or strong, and which properly operates under low load and produces little vibration during operation. The invention provides an arrangement wherein interposed between upper and lower structures are rolling bodies for horizontally supporting the upper structure for swing movement.

Abstract: The present invention relates to an earthquake-proofing device wherein a superstructure is placed and supported for horizontal movement on a foundation structure so as to increase the natural vibration period of the superstructure, thereby protecting the superstructure against earthquake energy and traffic vibration. More particularly, the outer periphery of an elastic body, visco-elastic body or viscous body which hardly exhibits rigidity by itself is surrounded by a restrainer which restrains it from bulging outward, thereby enabling the body to develop high vertical rigidity while allowing it to retain horizontal deformability, the body being used as a load carrier. The restrainer and/or load carrier absorbs vibration energy by frictional damping action.

Abstract: An earthquake-proofing device of peripherally restrained type including a laminate constructed by alternately laminating rigid plates and rubber-like elastic plates, the laminate being formed with a cylindrical hollow portion which opens at its opposite ends as viewed in the direction of lamination, and a visco-elastic body to be inserted into the cylindrical hollow portion to fill the latter. The earthquake-proofing device is characterized in that the volume of the visco-elastic body is greater than that of the cylindrical hollow portion by an amount corresponding to the product of the portion of the inner surface area of the cylindrical hollow portion opposed to the rubber-like elastic plates and 5-60% of the thickness of a single rubber-like elastic plate. The visco-elastic body having such excessive volume is pressed into the cylindrical hollow portion.

Abstract: The present invention relates to a first low-temperature insulating material which comprises polyvinyl chloride, a plasticizer, a water-containing or absorbing gel or an aqueous solution of a water-soluble polymer and an emulsifier and a second low-temperature insulating material which comprises polyvinyl chloride gelled by mixing with a plasticizer and a surface-covered, water-containing hydrogel. The insulating materials are inexpensive and show excellent heat-insulating properties and excellent flexibility at low temperatures.

Abstract: An iron type golf club head comprising a composite material of light metal or synthetic resin containing silicon carbide whiskers at 2 to 80% by volume and occupying 20% or more by volume of the body of the club head. The club head can be 10 to 60% lighter than a club head made entirely of steel with the same configuration and size, while the moment of inertia is approximately the same. Weight metal inserts having a specific gravity greater than steel can also be embedded in the club head.

Abstract: A method for measuring the physical properties of material comprising the steps of producing a tone burst wave by a tone burst wave oscillator, radiating acoustic energy of the tone burst wave onto an object to be measured to cause vibrations therein, detecting the vibrations as a waveform of an alternating wave at a vibration receiver, obtaining a gradient of a line which connects peaks in a first transitional region of the waveform from which can be determined the physical properties, in particular the energy transfer characteristics and/or restitution coefficient of the object.

Abstract: A method of discriminating solid golf balls from thread-wound golf balls which includes the steps of holding the golf ball to be discriminated between a transmitter coupled to an ultrasonic wave oscillator and a receiver coupled to an ultrasonic detector for detecting the ultrasonic wave received by the receiver, applying from the transmitter, the ultrasonic wave having a frequency which can propagate through the solid golf ball, but can not propagate therethrough, to the golf ball to be discriminated, and detecting presence of the ultrasonic wave reaching the receiver through the golf ball to be discriminated by the ultrasonic wave detector.

Abstract: A method of measuring hardness of a flexible thread-wound golf ball or its inner core which includes the steps of holding the flexible thread-wound golf ball or its inner core to be measured between a transmitter coupled to an ultrasonic wave oscillating source and a receiver coupled to an ultrasonic wave detecting device which detects the ultrasonic wave received by said receiver, applying from the transmitter, the ultrasonic wave having predetermined frequency to the flexible thread-wound golf ball or its inner core, and measuring the hardness of the flexible thread-wound golf ball or its inner core selectively by or based on the propagation time of the ultrasonic wave passing through the central portion of the flexible thread-wound golf ball or its inner core.