Abstract: A process for operating multistage turbocompressors (2, 22, 42) with a plurality of controllers (15, 35, 55) which interact one with each other, in which each compressor stage has anti-surge control valves (5, 25, 45) of its own, which recycle into the suction lines (1, 21, 41) of their respective own compressor stage (2, 22, 42). The control is performed by flow computers (6,26,46) for calculating the suction flow and computers (7,27,47) for determining the minimum acceptable flow from the delivery head. A comparison unit (12, 32, 52) determines the difference between the set point (derived from delivery head) minus the actual value (flow) and whenever the actual value is too low compared with the set point, it brings about a gradual opening of the corresponding surge line control valves (5, 25 and 45) until the actual flow exactly corresponds to the flow set point, which depends on the particular delivery head.

Abstract: Operational method for seaming the edges of a tubular knitted article (C) comprising the preliminary steps of knitting the article in a knitting station (T), removing the stitches of the last knitted rank with stitches-removing means mounted on a first unit movable between said station (T) and a hook-up station (R), overturning through 180.degree. the first semirank of stitches about an axis which virtually subdivides the last knitted rank into said first and second semiranks so as to dispose the thus overturned stitches in correspondence of the stitches of the other semirank, hooking-up the thus disposed stitches of the first and second semiranks, characterized in that it comprises, following the step for the removal of the stitches of the last knitted rank, the transfer of the stitches of at least one semirank onto means other than those which operate the above said removal, said transfer means supporting the stitches of said at least one semirank during said overturning step.

Abstract: The head comprises two covers (3, 5) connected together and an intermediate ring (7), these defining a volume for containing at least one cutting cord (F). The intermediate ring (7) comprises spring means (7A, 7B, 7C) that lock said intermediate ring (7) angularly to at least one of said covers in such a way as to prevent relative rotation between the intermediate ring and the cover in the direction in which the ring tends to be rotated by the resistive force (F.sub.t) acting on the portions of cutting cord projecting from the head (1) during the rotation of the latter; at the same time the spring means permit relative rotation in the opposite direction by torsionally releasing the intermediate ring from said cover, by the action of the traction exerted on said projecting ends of the cutting cords (F).

Abstract: An infrared image sensor, in particular one of the interlaced parallel scanning type, is described. The infrared image sensor has an optical focusing system for focusing an image on a matrix of sensitive elements (55) for the detection of the image. A collimator unit (5) forms a focal plane. The collimator unit is disposed at the entry of the sensor. At least one thermal reference (33), whose image is projected on the matrix (55), is disposed on the optical path of the image inside the sensor.

Abstract: The present invention pertains to a present atomizing type burner (1) for an engine independent heating system in a vehicle, comprising a pump (2) for feeding liquid fuel (4) through the fuel pipe (5) to the spray nozzle (3), a ventilator (6) for feeding combustion air (7) to the combustion chamber, an electric motor (9) for driving both the fuel pump (2) and the ventilator (6), and an igniting device (10) for firing the air-fuel mixture in the combustion chamber (8). The invention suggests that the system be fitted with a voltage and speed regulator (11) for the electric motor (9), as well as a device for regulating the fuel pump (2) pressure after the heating system has ignited and the flame has become stable.

Abstract: A device for displaying the exhaustion of a gas filter filled with an adsorbent (3). A toxic gas detector (14) determines the toxic gas content at a sampling site (8) within the adsorbent (3). A reference sampling site (12) is located in the area of a gas inlet point (6) of the gas filter (2). The toxic gas detector is designed such that it determines the toxic gas content alternately at the sampling sites (8, 12), and the exhaustion of the filter is determined by a comparison of the toxic gas content at the sampling site (8) with the toxic gas content at the reference sampling site (12).

Abstract: Disc brake comprising a caliper with two elements (8, 21) positioned on opposite sides with respect to a disc (D) integral with the hub of a wheel and each associated to a corresponding floating pad (19, 19) of friction material which faces a corresponding side of the disc (D). The orientation of the two pads being adjustable separately.

Abstract: A mobile measuring instrument that can be worn on the body of persons with a springless holder (1) for detachable fastening to pieces of clothing, with the following features: a plate (8) has a recess (9) with a cutout on one of two shorter sides; a flat slide element has a guide element (12) and is displaceably connected with same to the plate (8) via the cutout (10); both the plate (8) and the slide element (11) are provided with mutually parallel pins (2, 3; 4, 5) on the opposite, longer sides of the plate (8); the pins (2, 3) of the plate (8) are held stationarily rotatably in the housing (6) of the measuring instrument (7); and the pins (4, 5) of the slide element (11), which are arranged in two guides (17) in the housing (6) of the measuring instrument (7), are displaced between a maximum and a minimum distance from the pins (2, 3) of the plate (8), depending on the path of displacement of the slide element (11).

Abstract: Equipment for digging ground in urban areas includes a hinged support and maneuvering arm (3), an omnidirectional damping device (36), a vibration or oscillation generator (38), a motor (40) and a tool (28) which is made to rotate by the motor and provide with a helical structure with a tip (28B) designed to penetrate in screw fashion into the ground and act thereon it by the vibrations received, so as to dislodge it and break it up.

Abstract: The shoring includes a pair of fixed frames opposed to each other and a pair of collapsible reinforcing frames disposed between both ends of the fixed frames, the reinforcing frames each having collapsible baluster struts whose base ends are pivotally connected between end portions of the fixed frames, a support rod whose base end is pivotally connected to an intermediate position of the baluster struts, and plural braces whose base ends are pivotally connected to end portions of the fixed frames and whose front ends are mounted vertically slidably to the support rod.

Abstract: To prepare an absorption muffler for motor vehicles with a sound-absorbing material arranged in a hollow space of an exhaust muffler body in the form of glass wool (2), which is introduced into the hollow space in the form of an expanded, endless glass fiber roving, it is proposed that the exhaust muffler body (1) be completely prefabricated and assembled before the glass wool (2) is introduced into the prefabricated, assembled exhaust muffler body (1) from the outside.

Abstract: A method and a device to assess the adequacy of a cathodically protected underground pipeline with consideration of AC corrosion. A steel probe and a CSE are installed near the pipeline at a depth. The steel probe is electrically connected to a pipeline. The measurements of AC probe currents flowing between a steel probe (2) and the pipeline (1) are per-formed simultaneously with those of on-and off-potentials, and DC probe currents.

Abstract: A device is disclosed for positioning a knitting cam in circular knitting and stocking knitting machines. The knitting cam (11) is fixed to a slide (13), which can be moved on a support (15) by means of an eccentric ring rotated by a motor. The slide with knitting cam is provided with a first needle (18), resting on and following the eccentric inner profile of a second needle (19) resting on and following the outer surface of the eccentric ring (17) so as to move and position the slide in response to the rotation of the ring.

Abstract: On the disc (5) carrying the hooks (7) are two concentric pipes (12, 14) for tensioning the tubular fabric and for inverting it at the conclusion of the formation of the article. To close the toe: the loops of half of the needles (3A) are loaded onto the corresponding hooks (7A) and a first non-run lip (21) is formed and released onto the hooks (7A); the needles (3B) of the other half of the needles are used to form a second non-run lip (23) which is then transferred to the fabric-free needles (3A) of the opposite half, which engage the fabric along the second non-run lip (21) is passed from the hooks (7A) to the needles (3A), and a third non-run lip (25) is formed.

Abstract: A system for controlling the current supplied to an LED array includes an LED register which sends out individual signals to enable respective LED's. A plurality of drivers are provided, whose outputs are tied together and supply the power to the LED array. A plurality of logic blocks controls the enablement of the plurality of drivers. Each logic block is in communication with the LED register to determine a number of LED's enabled. Each logic block enables a respective driver depending on a number of the LED's enabled.

Abstract: A wheel carrier for motor vehicles with a slotted area. The wheel carrier has two limitedly elastic clamping jaws on a wheel side, which are traversed by a clamping bolt, whose tightening torque determines the strength of a clamping joint. This clamping joint fixes an end piece of a pivot pin of a ball-and-socket joint, especially a guiding joint. This end piece is inserted into the wheel carrier. The joint ball of the pivot pin is mounted in a housing accommodating the joint ball movably in all directions. A clamping protector 5 covering the slotted area 1.1 of the wheel carrier 1 is inserted into the slotted area 1.1 of the wheel carrier 1 and is sealingly fixed in the slotted area, while the material of the clamping protector undergoes plastic deformation in at least some areas.

Abstract: The machine for detecting traffic offenses, comprises means (1, 3) for measuring the speed of transit (v) of a vehicle (V) along a carriageway and, connected to these, camera means (5, 7, 9) for capturing an image of the vehicle. Means (F3; 11) are also provided for detecting the transverse position (d) of the vehicle across said carriageway; the camera means are controlled as a function of said transverse position (d).