Abstract: The present invention discloses herewith a new and novel dot printer for printing characters or the like by a dot matrix, wherein print timing is automatically corrected in relationship to the spacing speed of printing elements so that uneven dot distance is eliminated.

Abstract: This invention provides an ink mist type high speed printer in which an aperture board is provided between a first electrode and a second electrode across which a high voltage is applied. The aperture board is adapted to selectively control passage of ions generated from the second electrode, and a stream of ink mist is passed between said aperture board and first electrode so that the ions which have passed said aperture board will electrically charge the ink mist particles selectively to let the electrically charged ink mist particles deposit on a recording paper placed between the ink mist and first electrode to thereby print the desired dot matrix characters. This invention also features provision of electrostatic shields placed between said first electrode and ink mist stream and at places outside of the desired printing space to guard the aperture board against deposition of ink mist particles.

Abstract: This invention provides for an improved high speed printer using electrostatic means. The paper used is ordinary paper that is first dried to increase its electrical resistance. The electrostatic image is produced directly on the ordinary paper and then the electrostatic image is developed and fixed thereon. The invention includes details of the heating means.

Abstract: A new and novel dot printer for printing characters of dot matrix or the like by sliding a slide member in the direction of a row, said slide member being provided with a plurality of dot printing elements which are arranged in line thereon at a predetermined distance, wherein plate springs are provided on both ends of the slide member as a guide, support and return mechanism so that guide, support as well as return power are assured for said slide member.

Abstract: A dot printer for printing characters and the like with a dot matrix which is capable of preventing irregular dot spacings by automatically compensating for the change of print timing resulting from a change in the speed of movement of the printing element.

Abstract: A high speed printer in which ions produced between the high voltage impressed electrodes are modulated and then passed through an ink mist to electrically charge the ink particles to thereby print desired letters, figures, signs, etc., on a printing paper, characterized in that an electronegative gas containing a fluorine component and not containing any chlorine component is flown into the aperture board to prevent are discharge that would otherwise take place between the anode and aperture board.

Abstract: This invention provides an ink mist type high speed printer comprising a first electrode and a second electrode between which a high voltage is applied, and an aperture board disposed between the first and second electrodes and adapted to selectively control passage of the ions generated from the second electrode, wherein a stream of ink mist is passed between the aperture board and first electrode so that the ions which have passed the aperture board will selectively charge the ink mist particles to let the charged ink mist particles deposit on a recording paper placed between the ink mist and first electrode to thereby print a desired dot matrix character.

Abstract: In a three phase load controlling system two bilateral switching circuits control the current in the first and the third phases; the first phase is later than the third. The second phase is uncontrolled. The gating signals applied to the bilateral switching arrangement connected in the first phase are advanced by a constant degree with respect to the voltage of the first phase. The gating signals applied to the bilateral switching arrangement connected in the third phase are synchronized with the voltage of the third phase.

Abstract: Production of a recording material having the chemical composition Na.sub.6 Al.sub.6 Si.sub.6 O.sub.24 .multidot.2(1-x)NaX.multidot.xNa.sub.2 SO.sub.4 (X is F, Cl, Br or I and 0.1 .ltoreq. .times. .ltoreq. 0.8) by only the simple sintering method can be attained by substituting a part of halogen site of said composition by other ions.

Abstract: A driving system for moving paths or escalators which use an endles chain adapted to be circulated between a path for transporting passengers, comprising a first and a second sprocket disposed at one end portion and substantially middle portion of the path, respectively, a first and a second induction motor coupled respectively to the first and second sprockets and each having the same rating output the sum of which is selected to be substantially equal to a maximum capacity of the system, an induction coupling interposed between the second sprocket and the second induction motor, means for detecting a current flow through the first induction motor, means for setting a reference value, and a thyristor amplifier for exciting the induction coupling in response to an excess developed when an output of the detecting means exceeds the reference value.

Abstract: A high speed printer in which the ions produced between the high voltage impressed electrodes are modulated by an aperture board and then passed through an ink mist so as to electrically charge the ink particles whereby to print the desired letters, figures, signs, etc., on a printing paper, characterized in that a heating element is provided in the aperture board for lowering the relative humidity in said aperture board.

Abstract: In an AC elevator which is provided with a multi-speed induction motor unit connected to an AC power source and including a high-speed motor and a low-speed motor and in which an elevator car is started and accelerated by the high-speed motor, a control system comprising regenerative braking means connecting the low-speed motor to the AC power source through one set of thyristors connected in parallel in opposite polarity, DC braking means for supplying direct current to the high-speed motor from a controlled reactifier circuit, means for controlling the regenerative braking means to reduce the speed of the elevator car, means for detecting the reduction of the speed of the elevator car to a level at which the regenerative braking means is no more effective in producing the regenerative braking torque, and means for deenergizing the regenerative braking means and energizing the DC braking means in response to the output of the detecting means.

Abstract: A light deflector utilizing the anisotropic Bragg diffraction in an anisotropic medium in which the directions of the wave front normal and the energy propagation of ultrasonic waves are arranged to be different and the frequency range of the ultrasonic wave for causing re-diffraction of light diffracted once by said ultrasonic wave is set outside the driving frequency range. The diffraction efficiency does not fall near the central frequency of the driving ultrasonic frequency range due to the prevention of rediffraction. Further, the driving frequency can be selected over a remarkably wide range compared to that of the conventional light deflector.

Abstract: A high speed printing apparatus in which ions produced between electrodes receiving a high voltage are passed through an ink mist so that they are deposited with the ink particles to perform printing with such ion-loaded ink, characterized in that the ink mist produced in a mist tank is once stored in a reservoir tank and then fed to the printing section.

Abstract: A conductive shield board for protecting an aperture board from discharge is mounted between a positive electrode and said aperture board in an ink mist type high speed printer.The ink mist type printer operates on the principle that an ion stream modulated by an aperture board according to the pattern of the character to be printed, charges the ink mist, which is then attracted by an electric field, to the surface of the paper. However, a high potential on a positive electrode for generating said ion stream sometimes causes an undesirable discharge between the positive electrode and the aperture board.In order to avoid said undesirable discharge, a conductive shield board is inserted between the positive electrode and the aperture board.

Abstract: A high speed printing apparatus for causing ions generated by the application of a high voltage to adhere to ink particles and causing the ink particles to be absorbed selectively to recording paper for printing, wherein a layer of air flow is produced selectively between the recording paper and the ink mist in response to the completion of printing operation or the stoppage of feed of the recording paper.

Abstract: A high speed printer for printing desired letters, figures, signs, etc., on a paper by depositing ink particles on the paper after properly controlling ink droplets or selectively controlling corpuscles, characterized in that at least one ink mist passage is provided at a location closely adjacent to the surface of ink solution. An air feed port also is provided for introducing air into said ink mist passage after the air passes the ink mist source or its vicinity so that the produced ink mist will flow into said ink mist passage without forming any small convection.

Abstract: The ultrasonic wave generator of the present invention always drives a transducer with the resonant frequency f.sub.o of the transducer. Although the resonant frequency f.sub.o changes due to the temperature change etc., the driving frequency automatically follows the change of the resonant frequency f.sub.o. The control of the driving frequency is performed by means of a feed-back loop including a voltage controlled oscillator and means for applying a control signal to said voltage controlled oscillator according to the amplitude and/or phase of the driving signal of the transducer.

Abstract: A conductive protection board for protecting an aperture board from dust is mounted in an ink mist type high speed printer. The ink mist type printer operates on the principle that an ion stream modulated by an aperture board according to the pattern of the character to be printed, charges the ink mist, which is then attracted by an electric field to the surface of the paper. If an aperture of said aperture board is obstructed, a portion of the printed character will not be evident. In order to avoid the obstruction of an aperture the conductive protection board which has a plurality of apertures, each of which corresponds to each aperture of the aperture board, is placed very close to said aperture board.

Abstract: An acousto-optic filter utilizing the far-off-axis anisotropic Bragg diffraction comprising an optically anisotropic crystal in which a light beam of incidence travels in a direction making a large angle with the crystalline axis and an ultrasonic wave travels in a predetermined direction. In the acousto-optic filter using a paratellurite crystal, the wavelength of the visible light is tuned by changing the frequency of the ultrasonic wave in a low frequency range below 100 MHz. The ultrasonic power required for driving the acousto-optic filter is about 1/500 that of the so far known acousto-optic filters. The bandwidth of the transmitted light can be changed from several angstroms to several hundred angstroms by selecting the incident angle of the light.