Abstract: A rotary drum shear including two drums rotating in the opposite direction to each other and each having a spiral knife on the periphery thereof so that material fed between the drums is cut by engagement of the knives brought by the rotation of the drums in which the knives are formed so that a distance from a rotational center of the drums to the engagement position of the knives is gradually reduced along an axis of the drums from a start point of the engagement of the knives.

Abstract: A device and method for determining and acting upon the pressure in a balloon sleeve which closes a tracheal tube in the trachea of a patient comprises an inflation cannula which is connected to a pump and valve arrangement for inflating the sleeve. A pressure-to-voltage converter is connected to the cannula for sensing an instantaneous static pressure in the cannula. A differentiator is connected to the converter for differentiating the static pressure to produce a signal corresponding to pressure variations in the sleeve. The varying voltage corresponding to the pressure variations is then rectified and integrated to produce a signal that rises and falls with rising and falling frequency of pressure variations in the sleeve. If the rate becomes too high or too low, a signal is generated which is then again integrated to provide for transient unacceptable conditions.

Abstract: In a length measuring device with a measuring transducer system, the curve of two sinusoidal test signals is dependent on the longitudinal movement of the measuring transducer system. An interpolation circuit delivers two high-resolution rectangular pulse sequences F1, F2 corresponding to the interpolated sinusoidal voltages and offset by 90.degree., to an evaluating circuit. To achieve a high-resolution at low speeds of travel and a low-resolution at high speeds, two rectangular pulse sequences S1, S2 or G1, G2, offset by 90.degree. and giving a low-resolution, are additionally derived at the interpolation circuit. A control logic circuit 19 monitors the test voltages for attainment of a certain value of the longitudinal movement per unit time or speed of travel.

Abstract: An infant's chair for firmly fastening on a table is disclosed in the present invention. The infant's chair utilizes an accommodating device for holding an infant's body thereon, and two supporting members for securely supporting the accommodating device on the edge portion of the table without attaching it to the ground.

Abstract: The present invention is directed to a method for increasing the thermic content and, therefore, the water temperature in inland open water basins which have, therefore, an outlet or drain. The system provides for drawing off and conveying the cold water of the deeper layers of the basin toward the outlet or drain, while concurrently retaining within the basin the warmer water of the upper or superficial layers. The system may be carried out and implemented by means of fixed structures comprising at least one outflow conduit with one terminal within the basin's deepest water layers, through one or more intakes, and with the other terminal exiting into the drain, the structure further comprising one or more barriers positioned in the vicinity of the outlet or drain in order to retain within the basin the superficial layers of warm water.

Abstract: This invention relates to a preparation process of desulfurizing and denitrating agents for an off-gas produced upon combustion of a fuel such as coal or heavy oil.The agent can be obtained by providing as first raw material(s) one or more materials capable of yielding calcium oxide and calcium sulfate, providing as second raw material(s) one or more materials capable of yielding silicon dioxide and aluminum oxide, mixing the first raw material(s) or a mixture of the first raw material(s) and either fractional or whole portion(s) of the second raw material(s) with water, subjecting the resultant aqueous mixture to wet-air aging at room temperature or to steam aging, and optionally subjecting the thus-aged mixture further to a heat treatment at a temperature of 30.degree. C. or higher.

Abstract: A tire supplying apparatus has a self-propelled green tire carrying wagon for carrying a green tire to be vulcanized, a green tire unloading device mounted on the wagon and a green tire receiving stand disposed at a predetermined position located in front of a vulcanizing press or a green tire loading device mounted on the vulcanizing press. The green tire unloading device is provided with an aligning mechanism adapted to hold the unloaded green tire so as to displace it in any radial direction while it is lifted up, the aligning mechanism serving to locate its center in correct alignment with respect to the green tire receiving stand or the green tire loading device.

Abstract: A robotic wrist joint comprises a spherical member which is mounted within a ring shaped housing for rotational movement in any direction. A control pin extends from an outer surface of the spherical member. A first semi-circular yoke is pivotally mounted to the ring shaped housing and carries a first track. A second yoke is provided in a position radially inwardly of the first yoke. The second yoke is also semi-circular and is mounted for rotation on the housing about an axis perpendicular to the rotational axis of the first yoke. The second yoke carries a second track. The control pin extends into both the first and the second track so that the spherical member can be brought into any desired location by selectively pivoting the yokes.

Abstract: The present invention has for its object to provide a photo coupler which is operable with high sensitivity, high speed, low voltage and small current. To this end, a photo detector (13, 20, 33), which is coupled with one light emitting element (11, 21, 31) through a light transparent insulator, is formed by any one of a static induction transistor, field effect transistor and a static induction transistor.

Abstract: An indicating tube for detecting gas type and characteristics comprises a hollow transparent tube having a passage therethrough for the passage of a gas to be detected and with a first material in the passage giving a visual indication of the gas characteristic and a second material in the passage which gives a visual indication of the temperature characteristic of the gas.

Abstract: A methotrexate derivative having the following general formula is incapable of forming polyglutamate and thus is expected to have reduced cytotoxicity associated with the formation of polyglutamate derivatives in a living cell, ##STR1## wherein n is from 0 to 5.

Abstract: A four-barrelled pistol is disclosed which comprises a hammer having a rotating, click-action head for successively acting on firing pins corresponding to the four barrels. Particularly, a tripping mechanism is disclosed which controls the hammer of the pistol to allow either a single-action or double action operation. The pistol includes a mechanism for blocking and keeping the hammer in a cocked position when the trigger is at rest and for unblocking it when the trigger has been displaced, and mechanism for displacing the hammer into the cocked position and disengaging it immediately thereafter as a result of the displacement of the trigger.

Abstract: In a sewing machine with a microcomputer controlled step motor for the control of the magnitude and direction of the feeding action of a cloth feeder, the microcomputer is connected, via a buffer and a D/A converter, to the non-inverting input of a comparator which controls the turn-on and turn-off as well as the current intensity of each phase winding of the step motor and whose inverting input is connected to a discriminating element disposed in the phase circuit, for the step setting correction and for the torque intensification of the step motor. To adapt the correction possibilities to the step motor parameters, the D/A converter has four input stages whose biggest stage is connected to the corresponding output stage of the buffer via a voltage divider.

Abstract: The specimen (P) carrying the impression (I) is illuminated to create a variation of the impression luminance respect to the neighboring zone, and the image magnification of the impression is then performed by an optical system (OS). The magnified image is scanned with a telecamera (VC) to generate image electrical signals carrying informations indicative of the image luminance. By a technique of image segmentation, a computer (CS) draws from these image signals, position data of a group of image points taken, according to predetermined selection criteria, as belonging to the sides of the impression contour (I). Through the position data of at least some of such points, the position of characteristic points of the impression, for example the impression vertices in the Vickers hardness test, is then extrapolated or interpolated.

Abstract: A hair trigger for a rifle provided with a principal or normal trigger mechanism (A) and a hair or light trigger mechanism (B) for the firing pin (1) of the weapon, the said normal trigger mechanism (A) comprising a trigger lever (9) pivotally mounted on a pin (6) and capable of angular displacement with the trigger (5) and a trigger slide (10) which is guided vertically and designed to act together with the overlying cam profile (3-4) of a foot (2) attached to the firing pin (1), the said trigger lever (9) being displaced by a spring (11) towards the trigger slide (10) while the latter is displaced by a corresponding spring (15) towards the said foot (2), the said trigger lever (9) acting as a strut to hold the trigger slide (10) in a condition immobilizing the firing pin in the retracted cocked position, the said trigger lever (9) being capable of being displaced by the trigger slide (10) when the firing pin (1) is released to fire a projectile, wherein the light trigger mechanism (B) includes a small pisto

Abstract: Disclosed herein is a preparation process for polypropylene-base resin compositions, which process comprises heating at a temperature of 170.degree.-280.degree. C. a mixture containing a crystalline ethylenepropylene block copolymer having a specific composition, an ethylene-propylene copolymer rubber having a specific composition and viscosity, an inorganic filler having a specific particle size, and an organic peroxide, all in specified amounts. The thus-obtained polypropylene-base resin compositions are suitable for use in the production of large moldings such as automobile bumpers, fenders and body sidemembers because of their excellent low-temperature impact resistance, high molding fluidity, good paintability and high stiffness as well as their low preparation cost.

Abstract: A plastic heat exchanger comprises a single heat exchanger construction made up of a plate having two spaced apart walls and with a plurality of substantially parallel cross webs interconnecting the two walls which define a multiplicity of longitudinal heat transfer medium flow channels. The plate is assembled with a distribution and collection element which has spaced apart walls which are adapted to be arranged in abutting relationship with the walls of the plate and welded together with them to form a unit. The distribution and collecting element includes at least one heat transfer fluid plastic nipple inlet connection and at least one heat transfer fluid plastic nipple outlet connection. Advantageously, each unit may be interconnected by means of a plate which connects one nipple element of one distribution connecting element with a different nipple element of the next adjacent distribution and collection element.