Abstract: A shaft retaining device having a shaft selectively retained as to translation and rotational movement. A sleeve coaxial with the shaft encloses a length of the shaft. The shaft has an outwardly projecting cam within the sleeve. A cam follower carried by the sleeve has a part thereof within the sleeve in a plane normal to the shaft axis and is cammed away from the shaft by the cam. The cam and cam follower have complementary profiles, one of which is a male profile and the other is a female profile, in which the cam and cam follower engage other effectively selectively immobilizing the shaft and sleeve as to relative translation movement when the cam and cam follower engage each other.

Abstract: A process for preparing phenols with high selectivities, comprising reacting a phenol compound and a formaldehyde source with a quaternary ammonium as a counter cation of a phenol anion in the presence of an alcoholic organic solvent.

Abstract: A portable telephone system is disclosed in which a plurality of i-th class exchanges, which accommodate key service units of a plurality of portable telephone sets present in each service area, and at least one (i+1)th class exchange which accommodates the plurality of i-th class exchanges through junction lines, are stratified to form an exchange system so that i=1, 2, 3, . . . , and so that the (i.1)th class exchange covers all service areas. The exchange system has a function whereby information which specifies the home area of each portable telephone set and the portable telephone set in distinction from each other is registered in the i-th class exchange and the (i+1)th class exchange, which administer the home area.

Abstract: Apparatus for playing rebounding ball games on a hollow pyramid-shaped structure having three or four solid side surfaces constituting playing surfaces. The pyramid-shaped structure is positioned upright or laid on a side, centrally of a plurality of playing courts corresponding in number to the sides of the structure and each side surface confronting a respective court. The games are played by rebounding a suitable rebounding ball from external playing surfaces or internal playing surfaces of the hollow structure in a corner ball game.

Abstract: The ergometric device has an ergometric stationary bicycle exerciser, a hypoxic gas generator, a mask, and a flexible hose connecting the generator to the mask. The user of the device sits on the saddle of the exerciser, and produces his effort by inhaling, through the mask, the hypoxic mixture. His ECG, his pulse rate and his blood pressure appear on the screen of the generator.

Abstract: Accordingly to the present invention, when an incidence angle of a direct wave or a satellite elevation angle reaches a predetermined value, signals from two (or more) antennas, which are disposed at positions where variations in the field intensities of radio waves recevied by the two antennas are negatively correlated (i.e. when the received signal level of one of them is low, the received signal level of the other is high) or uncorrelated (i.e. the variations are not related to each other), are successively or discretely switched at a suitable switching period, by which burst-like errors are spread with time to perform the de-interleave or interleave function in decoding transmitted signals.

Abstract: A surface acoustic wave resonator having an interdigital transducer on a piezoelectric substrate. Grating reflectors, which have electrode strips of the same width and the same pitch as those of electrodes of the interdigital transducer and of a number smaller than 1/5 that of said electrodes of said interdigital transducer, are disposed at the intervals equal to said pitch at both sides of said interdigital transducer on a surface wave propagation path. The electrode portion of the interdigital transducer is weighted so that the aperture of the interdigital transducer is maximum at the center of the interdigital transducer and uniformly decreases toward its both sides along respective sides of a rhombus with its vertices at the centers of the outermost electrode strips of the grating reflectors.

Abstract: A window stay is provided for a casement type window so that its window sash is shifted outwardly from the window frame as it is being opened. The window stay comprises a first arm, a second arm, and a third arm associated with a driving rod. The first arm has its respective ends pivotally attached to the window sash and the window frame and swings the window sash in relation to the window frame as the driving rod is operated. The second arm has its ends respectively pivotally attached to the window sash and the driving rod and swings the window sash in relation to the first arm as the driving rod is operated. The third arm has its ends respectively pivotally attached to the first arm and the driving rod and swings the first arm in relation to the window frame in accordance with the movement of the driving rod.

Abstract: A concrete vibrator is disclosed in which a sensorless semiconductor motor is employed for driving an exciter. The sensorless semiconductor motor has an arrangement in which the rotational position of the permanent magnet rotor is sensed through utilization of a voltage which is induced from three-phase stator windings, i.e. a voltage which is induced according to the magnetic flux distribution in the gap and varies its frequency with the rotation speed alone instead of by using the Hall element which is readily damaged by vibration and heat, that is, seriously poor in environmental resistance. Further, the sensorless semiconductor motor is arranged so that the current supply to the stator winding is placed under control of a semiconductor inverter which is controlled by a PWM or PAM system.

Abstract: A wavelength-tunable semiconductor laser of distributed feedback (DFB) type wherein a diffraction grating having periodic corrugations along the direction of travel of light is formed on an active layer of at least one of layers adjacent thereto. An electrode on one side is separated into four or more electrodes in the direction of the cavity of the laser. Nonadjoining ones of them are electrically connected to form two electrode groups. The total length of first regions corresponding to a first one of the two electrode groups is larger than the total length of second regions corresponding to the second electrode group. The refractive indexes of the first regions are changed through current injection change to the first electrode group to vary the lasing wavelength and the gain of the second regions is controlled through current injection to the second electrode group, thereby generating output light of a constant output power and a variable single wavelength.

Abstract: A quaternary-level waveform generator in which a modulation wave prior to a band restriction (a quaternary-level square wave sequence) is separated into two binary-level square wave sequences and as waveform components prestored corresponding waveform component outputs after a predetermined band restriction are read out of a waveform component generating read-only memory and added to generate a desired quaternary-level waveform shaped by the band-restriction.

Abstract: A multi-level band-restricted waveform generator in which a modulation wave prior to band restriction (M-level signal sequence) is broken into elementary waveforms and a plurality (N-nary) of prestored waveform components corresponding to the elementary waveforms after predetermined band restrictions are read out of a read-only memory for generating waveform components and added to generate a desired multi-level band-restricted waveform.

Abstract: The sleep-apnea syndrome is classified into a so-called central type caused by an abnormality in the respiratory center, an obstructive type by an upper airway obstruction, and a mixed type by a combination thereof. Among the rest, the obstructive type is often observed clinically and is considered to be caused by a morphological abnormality in the upper airway tract, such as tonsillar hypertrophy or micrognathia, or by a tonus of the upper airway muscle for broadening the airway. The inventors of this application have clarified by experiments that the upper airway can be recovered from obstruction which causes apnea stimulating the genioglossus, which is one of the dilator muscles of the upper airway, with pulses of a frequency of 40 to 150 Hz, a peak value of 1 to 50 volts and a rise-up time constant of 0.

Abstract: A speech encoder is disclosed, in which, of the DCT coefficients after the discrete cosine transformation, a coefficient which has a large absolute value and exerts great influence on the tone quality is selected and encoded and zeros are inserted into the other unselected coefficients, so that selective encoding is carried out which does not seriously deteriorate the tone quality even when the coding rate is 8 kbps or below. In another arrangement, about three to 16 different selection patterns (vector patterns per frame) are used for the selective coding and a pattern which minimizes the coding error is selected and encoded to ensure optimum coding.

Abstract: A new series of benzofuran and benzothiophene derivatives are disclosed. These compounds have a structure which can be obtained by substituting the third position of 2-lower alkyl-benzofuran or 2-lower alkyl-benzothiophene with a substituted benzene derivative, itaconic adic derivative or a substituted phenoxymethyl tetrazole derivative. They are useful as diuretics without side effects of elevating serum uric acid levels and can be used in the treatment of hyperuricemia.

Abstract: A system for detecting three-dimensional motion of a three-dimensional object by obtaining, for each block, a velocity vector from two temporally successive images of a moving picture including the three-dimensional object.

Abstract: A microstrip antenna of two-frequency separate-feeding type for circularly polarized waves is disclosed, in which four radiation conductors are disposed on a dielectric plate mounted on a conducting ground plane and each radiation conductor has its marginal portion partly short-circuited via a short-circuiting conductor to the conducting ground plane and is supplied at its feeding point with power via a feeder passing through the conducting ground plane and the dielectric plate. The four radiation conductors are composed of two pairs of radiation conductors of different sizes adjusted so that two desired frequencies can simultaneously be used for transmission and for reception, respectively, the conductors of each pair being arranged to generate a circularly polarized wave.

Abstract: In regard to the case when a stretch film is wound round in a state of tension on amassed goods for packing the same, this invention is so designed that the film is split in the width direction and in parallel into a large number of narrow-width tapes, while it is stretched, in a process of winding the film around the goods and thereby diagonal spaces are formed naturally on a desired circumference of the amassed goods, so as to produce an airing effect on the amassed goods.

Abstract: A fungicidal composition and method for the protection of vines against disease are provided. The composition which is applied to vines contains as active material a mixture of 1 part by weight of a monoester salt of a phosphorous acid of the formula ##STR1## in which R is an alkyl radical having 2 to 4 carbon atomsMe is an alkali metal, alkaline earth, or aluminum atomn is a whole number from 1 to 3 equal to the valence of Meand from 0.05 to 8 parts of at least one contact fungicide selected from the group consisting of compounds having a base of copper, the metallic ethylene bisdithiocarbamates, and the derivatives of phthalimide.

Abstract: Apparatus for producing sheets or foils of plastic or rubber mixtures includes a calender having two rollers rotatably supported by spaced calender stands with a gap between the rollers and an extruder having an extruder head with wide mouth for extruding a sheet of material into the roller gap of the calender. One part of the extruder head is fixed while another part is pivoted for movement relative to the fixed part by a cylinder-piston unit. The calender is stationary while the extruder is mounted by screws, providing vertical adjustment, on a base having wheels for horizontal movement of the extruder toward and away from the calender to vary the distance between the extruder mouth and the roller gap of the calender. The base of the extruder is coupled with the calender by a threaded spindle rotatable through a reducing drive by a reversible motor to move the extruder toward and away from the calender.