Abstract: A safety device for machine tool operators has a generator for RF signals, an antenna connected with the generating means for receiving the generated signals, and positionable in the vicinity of a working zone of the machine tool to supply the signal to the working zone, an and element to be worn by an operator and providing a delayed version of the RF signal when the element is located in the vicinity of the antenna. An RF signal receiver is connected with the antenna and receives the delayed RF signal supplied by the element, a blocking unit is connected with the receiving means and blocks a machine tool drive when the RF signal delayed by the element worn by the user is received by the receiving means.

Abstract: A method of producing a higher temperature cold and a lower temperature cold comprises the steps of generating a higher temperature cold and a lower temperature cold each including a compression of vapors of refrigerant condensation of the compressed vapors and subsequent expansion of the refrigerant with accompanying cooling, accumulating the generated colds, supplying the generated colds to corresponding consumers of higher temperature cold and lower temperature cold, and performing the generating, the accumulating and the supplying of the lower temperature cold at a second auxiliary stage during periods of reduced demand in the higher temperature cold generated at a first stage.

Abstract: A medical needle unit has a needle having a tip insertable in as well as withdrawable from the body of a patient and a protective element for preventing accidental puncture by the tip of the needle after the withdrawal the tip of the needle from.

Abstract: A vehicle barrier for preventing unauthorized entry of a vehicle to a designated area comprises a frame, penetrating means mounted on the frame and engageable into a ground so as to prevent movement of the barrier upon impact by an unauthorized vehicle; means for puncturing tires of an unauthorized vehicle provided on the frame, means arresting the unauthorized vehicle on the frame when the vehicle enters the barrier, and means for allowing the frame to move on a road surface so that the barrier can be installed at the desired location.

Abstract: An artificial kidney system comprises an artificial kidney forming container having an inlet blood port connectable with a patient's artery and an outlet blood port connectable with a patient's vein so that blood from the patient's artery can flow through the inlet port into the container, then through an inner space of the container and then through the outlet blood port into the patient's vein, the inner space of the container being filled with an adsorbent for removing harmful and toxic compounds from a stream of blood flowing in the inner space from the inlet blood port to the outlet blood port, the container being provided with a separate chamber formed inside the inner space and limited by a semi-permeable polymeric ultrafiltration-type membrane which allows water and dissolved small molecules to be transported from blood into the chamber, and suction element connectable with the separate chamber so that the water and the dissolved small molecules are transported from blood into the separate chamber and

Abstract: An internal combustion engine has a rotatable work shaft, a crank connected with the work shaft, a plurality of cylinders having working chambers, a plurality of pistons movable in the cylinders, and connecting means connecting the pistons with the crank so that a gas pressure in the combustion chambers applied to the pistons is transmitted when a maximum pressure is obtained in the combustion chambers and a maximum lever arm of the crank is obtained so as to provide a maximum torque on the work shaft.

Abstract: A refrigerator comprises a main body having an inner chamber, a door moveable relative to the body between an open and a closed position, the main body having substantially horizontal main shelves, the door having substantially horizontal door shelves formed so that in a closed condition of the refrigerator the door shelves are turned into the main body, the door walls extending radially, the main shelves and the door shelves being provided with vertical walls which cooperate with one another so that the door shelves with the vertical walls.

Abstract: An apparatus for providing a customer of a television system with virtual personal channel which being selected delivers a television program of the most personal interest no matter on which channel and at what time the program is physically transmitted. Descriptive and time/channel data of scheduled TV programs are broadcasted through a communication medium from the system headend to customer terminal prior to transmission of programs themselves. In customer terminal all scheduled TV programs are evaluated by a computer that stores customer profile data and controls customer video receiver and video recorder. Whenever customer selects personal channel the computer switches the video receiver to a physical channel on which a program having the best evaluation is transmitted. The best program of the day or the week is recorded and can also be presented as current program of personal channel.

Abstract: A back support to be worn by sufferers on their bodies comprises a patch of fur having a shape with a contour including an uppermost widest side, two lateral sides extending downwardly from the uppermost side and converging toward one another, and a smallest lower side connecting the lateral sides with one another, and means for holding the patch on a user's body.

Abstract: A rotating cutting tool has a cutting annular element which is mounted and displaced so that the cutting annular element has an attack angle exceeding 90.degree.. The cutting element has a convex cutting front face and a skew angle between 0.degree. and 90.degree..

Abstract: A method of plastic deformation of metals, alloys and other crystalline materials for controlling their structure and texture comprises the steps of extruding a workpiece through two intersecting passages having equal cross-sections corresponding to a cross-section of a workpiece, the pressing including determining during each passage of a workpiece three main directions corresponding to a flow direction, a perpendicular to the flow plane, and a perpendicular to the first mentioned and second mentioned directions, changing the directions during placement of a workpiece in its initial position for each passage relative to a corresponding position in a predetermined passage by turning the workpiece by a predetermined angle around axes of the main directions, and cyclically repeating the method.

Abstract: A toilet unit comprises a toilet bowl having a wall limiting an interior and provided with an upper part on which a user can sit, an observation screen located outside of the toilet bowl, and a plurality of light guiding elements extending from the interior of the bowl to the observation screen so that by looking on the observation screen a user can see lower parts of his or her body while sitting on the toilet bowl.

Abstract: A machine for cleaning and disinfecting transportation vehicles comprises a frame provided with a plurality of wheels, electric motor means for driving the wheels and therefore moving the machine in a predetermined direction, a device for washing and cleaning a central area of the floor and under side seats of a transportation vehicle to be cleaned, and a device for washing and cleaning walls, seats and a ceiling of the transportation vehicle. The device for washing and cleaning the floor includes a unit for washing and cleaning a central area of the floor and a unit for washing and cleaning areas under the seats of the transportation vehicle, the device for washing and cleaning walls, seats, and ceiling being provided with lever elements movable between a plurality of positions suitable for correspondingly cleaning the walls, the seats and the ceiling of the transportation vehicle.

Abstract: A sampled-continuous probability method of velocity measurement of an object having informatively-structural inhomogeneity by periodical execution of a cycle of the measurement, with determination of time during which a selected local part of the object moves along the measuring base of zone of observation is proposed. Selection of the local part in the beginning of the measuring base and its subsequent determination at the end of the measuring base is performed with the use of an informative aggregate of selected informative signs of a dominant informative component of the inhomogeneity. In order to increase the accuracy and speed of the method, the beginning of each cycle of velocity measurement is performed in response to a special command formed after the beginning of a preceding cycle of the velocity measurement with a given interval of time of shifting of the cycles, but within the preceding cycle.

Abstract: A fishing lure comprises a main body having a predetermined weight, a hook connected to the main body, a shaft extending from the main body, a blade turnably connected to the shaft so as to turn relative to the shaft during fishing, and a second body connected with the shaft.

Abstract: For improving corporate employee business conduct guidelines education, a system and a method are provided in accordance with which the employee reviews the basic concepts stored in storing means and related to business conduct guidelines, then the employee is quizzed on the basic concepts by displaying a quiz on the computer display; in the event if including the employee's scored satisfactory score for presenting on the computer display, cases of real life application of the basic concepts, in the event if the employee does not score a predetermined score providing at least one remedial education loop on the basic concept, quizzing the employee on each case study by a quiz presented on the computer screen, in the if the employee does not score a satisfactory score on the quiz providing a remedial education loop for the case study, and in the event if the employee scores the satisfactory score on the case study printing a certificate of completion of a business conduct guidelines education.

Abstract: A water sink system, comprising a water discharge member, two rotatable knobs for allowing hot water and cold water to flow into the water discharge member and meet there to produce discharged water with a desired temperature, a scale provided near each of the turnable knobs and having a plurality of graduation marks, and a pointer provided on each of the turnable knobs and turnable with the latter, so that when a user by turning the turnable knobs reaches a desired temperature, each pointer points to a respective graduation mark of each scale, with graduation marks can be memorized by a user and thereafter he can turn the knobs immediately to the memorized graduation marks.

Abstract: A construction panel comprises two plates spaced from one another by a predetermined distance, and a plurality of strips extending transversely to one another and between the plates and connected with the plates so as to form a plurality of cells between the strips and the plates inside the panel.

Abstract: A semiconductor rectifying module has a metal base, a dielectric heat conducting spacer arranged on the metal base and rectifying elements of anode and cathode groups arranged with their cathodes and anodes on the spacer, the rectifying elements being composed of a semiconductor with at least two layers having alternating conductivity types, each of the rectifying elements being surrounded by its side surface by a side layer of a first type conductivity semiconductor material while an original material is a second type conductivity semiconductor material, and being provided with an upper closed separating groove with an external part bordering at least the side layer.

Abstract: A water jet propelling device has a rotor adapted to be located below a waterline and having a front water impermeable wall, a peripheral wall formed by a plurality of blades arranged with gaps therebetween to form a water inlet and extending tangentially to a circumference of the rotor, and a rear water permeable wall which forms a water outlet.