摘要:
A plasma X-ray source is operable, like the plasma focus type source, to generate impulse discharge through a gas filled in a discharge tube. A relatively small amount of the gas is continuously supplied to and evacuated from the discharge tube in accordance with an occurrence frequency of discharge, without operating evacuation and filling of the gas at each cycle of discharge, under the regulation to make constant the pressure within the discharge tube, thereby eliminating the time for exchange of gas contaminated by discharge, reducing the amount of gas used, and improving reproducibility of discharge.
摘要:
A low-pressure mercury vapor discharge lamp comprising an envelope forming a gas-tight closed space and a pair of inner tubes provided in the closed space and having an end thereof sealed at the first end of the outer envelope, the other end thereof being opened into the closed space, and electrodes provided at the sealed end sides in the inner tubes. The temperature of the coldest spot of the envelope is in a range between 45.degree. C. and 65.degree. C. at an ambient temperature of 25.degree. C.
摘要:
In an electron beam control system wherein manual adjusting means is used for adjusting currents to flow through two deflection coils which serve to deflect an electron beam in directions of two, x and y axes, respectively; an electron beam control system wherein the manual adjusting means comprises a joy stick type variable resistor which can simultaneously deliver coil deflection signal components in the directions of the two axes through a single operation, and the signal components from the variable resistor are applied to the corresponding deflection coils as adjusting currents.
摘要:
A refractory power measuring device for measuring the refractory power of the human eye or a lens. The device includes a target projecting optical system having two optical elements which are movable along the optical axis of the system independently from each other. The device can measure simultaneously the refractory powers along two astigmatic axes.
摘要:
An eye refractmeter comprising a target projecting optical system for projecting an image of a target means through a pupil of a patient's eye to produce a target image on a retina of the eye, an observing optical system including objective lens means for observing the target image through the pupil, and a sighting optical system for observing light reflected at the cornea of the eye to determine that the objective lens means is appropriately spaced from the patient's eye, means being provided in the projecting optical system so that the image of the target means is projected by an infrared ray, half-transparent optical means for passing therethrough one of the light bundles along the observing and sighting optical systems and reflecting the other of the bundles, means for directing both of the light bundles passing through the observing and sighting optical systems to a single image pick-up tube, the half-transparent optical means having a reflecting rate such that more than 50% of the light along the observing optical system and less than 50% of the light along the sighting optical system are directed to the image pick-up tube.
摘要:
An eye fundus camera system is provided with a photographic optical system and associated optical axis, an illuminating optical system and associated optical axis and a mark projection system and associated optical axis. The illuminating system is separate from the mark projection system so that operation of the mark projection system during focusing of the photographic optical system will not adversely affect the illumination of an eye fundus.
摘要:
In an inking device of a printing machine including an inking roller, there are provided a plurality of cam levers disposed side by side and in direct contact with each other along the longitudinal direction of the surface of the inking roller and supported pivotably by a stationary member of the inking device. The cam levers are driven by adjusting means so as to adjust the gap between the surface of the inking roller and the surface of the cam levers.
摘要:
The controlling lever of the mechanism for use in civil work machines or cargo winches is supported by a spherical bearing so as to be tiltable in any direction by any inclination angle. Four horizontal shafts are provided to extend in the +X, -X, +Y and -Y directions of a rectangular coordinate about the center of rotation of the controlling lever. Four arms are rotatably mounted on respective shafts and are biased by torsion springs wound about respective shafts. Slidable contacts are mounted on respective arms to slide along rheostats, thus producing electric signals proportional to the direction and angle of inclination of the controlling lever.
摘要:
A fireproof linear aromatic polyester having a high stability to ultraviolet rays and heat contains a unit of the formula: ##STR1## WHEREIN R.sub.1 and R.sub.2 are each a straight or branched alkylene group having 1 to 5 carbon atoms and n.sub.1 and n.sub.2 are each an integer of from 1 to 4. The addition of an organic pentavalent phosphorus compound may improve the fireproof properties of products prepared from said polyesters.
摘要:
A compact transmitter-receiver circuit particularly adapted for short-distance mobile communication includes a pair of parallel nonlinear circuits, first and second hybrid circuits connected to the pair of nonlinear circuits on their high- and low-frequency sides, respectively, and a radio-frequency generator and a driver circuit connected to the respective hybrid circuits. One of the four terminals of the first hybrid circuit serves as a common input-output terminal of the transmitter-receiver circuit without necessitating any particular means conventionally required for separation between transmission and reception signals.