Abstract: A bogie with swiveling axles for pivotable mounting under the body of a rail vehicle of the metro or tram type having a bogie chassis (1) carried by two axles (2) provided with axle boxes (3) and capable of being swiveled by an articulated system moved by the rotation of the body, the chassis (1) being supported on each axle box via two resilient support elements (4, 8) at least partly constituted of elastomer and mounted above and below the box, a second articulated system (5) connecting two axle bones in such manner as to cause them to pivot about vertical axes of symmetry of the axles.

Abstract: The invention concerns a thermic machine comprising a reactor of the adsorption-desorption type, a condenser and an evaporator. According to the invention, the machine is constituted by a first vertical hermetic cylindrical tank section (1), traversed by a first hydraulic circuit (4) and containing the reactor, an envelope arranged at the periphery of the first tank section (1), which is connected to a second hydraulic circuit (6) and which together with the wall of the said first tank section (1) constitutes the condenser (5), and a second hermetic tank section (2) in communication with and arranged below tank section (1), the second tank section being traversed by a third hydraulic circuit (7) and constituting the evaporator.

Abstract: This apparatus controls the execution and content of computer programs in equipment containing a computer by causing the transfer of program data elements, including computer instructions, with a memory means of the apparatus, wherein the selection of data for transfer is effected either by the computer, operating in a normal manner, or by the apparatus, which may shift data selection between these two selection options so that the computer ceases selection of data constituting one program and begins selecting data of another program. While data elements are being transferred with the computer, other elements of the memory means are available for examination and modification such that new programs, the content of which may depend on the results of prior program execution, can be loaded, executed, and examined without interrupting, delaying, halting, or otherwise disturbing the instruction flow of the computer equipment.

Abstract: The invention concerns a process and an installation for vertical racking of drill shafts on a drilling tower. The installation comprises mechanisms (34, 36, 38, 40) to grasp an upper intermediate portion of an assembly (26) of shaft sections removed from the well bore, and to incline this shaft assembly with respect to vertical below lifting mechanisms (16, 18). The installation further includes mechanisms (42, 44, 46, 48, 50) to receive and support the lower end of the shaft assembly and then displace the assembly in synchronization with the first mentioned mechanisms to transport the assembly to racks for vertical storage.

Abstract: A power semiconductor column has power semiconductor elements arranged in alternation with thermally and electrically conductive evaporation blocks. Each evaporation block is connected in a separate heat-dissipating fluid circuit. Each fluid circuit has a heat exchanger connected to the corresponding evaporation block by way of a pair of flexible, electrically insulating fluid connections. Heat-carrying dielectric fluid circulates within each circuit between the evaporation block and the heat exchanger, cooling of the semiconductor elements being effected by evaporation of the fluid in the evaporation block and condensation of the fluid in the heat exchanger.

Abstract: The invention concerns a process and an apparatus to initiate the reversal of an inverter controlling the placement of a so-called hands-free telephone set in a reception mode or a transmission mode. According to the invention, the position of the inverter (8) is a function of the sign of the difference between the amplitudes of the integrated analog emitted signal and the integrated analog received signal. By preference, the received signal is drawn downstream (from the received-signal output) of the inverter, while the emitted signal is drawn upstream (from the emitted-signal input) of the inverter (8). A second received signal is drawn upstream of the inverter (from the received-signal input) so as to nullify the delay imparted to the change in position of the inverter if the amplitude of the corresponding integrated signal becomes significant.

Abstract: A system for supply of direct current to at least two electrical loads having a common polarity, especially for power supply to an arc furnace with several electrodes or to plasma generators, comprises a set of load-controlled rectifiers (7) arranged in a Graetz bridge (A, B, C), in parallel upon a common alternating current power supply (5, 6). The half-bridges (A.sub.2, B.sub.2, C.sub.2) situated on the common-polarity side have a common dephasing control voltage, while the half-bridges (A.sub.1, B.sub.1, C.sub.1) situated on the other side are each controlled individually. This mechanism can be used in particular for power supply to arc furnaces or plasma torches.

Abstract: A method of and apparatus for co-extruding upon a first continuous coating adhered to a substrate band (such as a pressure-sensitive adhesive), periodic top coat sections of coating material of different characteristics (such as non-stick properties), as for such purposes as providing laminating adhesive strips in desired regions only, as for use in diaper laminates and the like.

Abstract: A circuit monitors the period of separation between impulses and provides an output only when the period of separation between successive impulses is substantially the same as a predeterimed period. The impulses are applied to a monostable circuit which produces pulses of fixed duration in response. A switching circuit controlled by the pulses switches a binary counter to be driven by a low frequency oscillator output between pulses and by a high frequency oscillator output during pulses, the counter being reset to zero at the trailing edge of each pulse. A comparator determines whether, before reset, the counter reaches a count corresponding to the predetermined period and provides an output pulse to an AND circuit input when the count is reached. The AND circuit has another input connected to the monostable circuit output and thus provides an output pulse when the comparator output is coincident with a corresponding pulse from the monostable circuit.

Abstract: A railway system utilizes a discontinuous linear motor for the propulsion of a train composed of a plurality of transport units joined end-to-end, each including a group of vehicles normally maintained coupled to each other. The transport units are of the same length L and carry secondary elements of the linear motor at regular intervals. A track for the train has active sections incorporating primary inductors of the motor and separated by inactive track sections having no primary elements. The primary inductors within an active track section are disposed at regular intervals L, from center to center. In the active track sections, the linear motor provides power to the train proportional to the number of transport units.

Abstract: The present invention involves a thermal compensation procedure for magnetic circuits, such as those used in security devices detecting metallic masses, whose losses increase as a function of ambient temperature. According to the invention a body is placed in the immediate proximity of the magnetic circuit, the body being made of a material whose magnetic permeability is a decreasing function of temperature and whose Curie point equals the maximum possible ambient temperature.

Abstract: The invention provides an elastic compensation chamber, with variable volume, for a huydraulic energy dissipator of the telescopic type in which the elastic compensation chamber (20) is formed by one or more cylindrical sections (21) which only partially surround the working cylinder (1), to create large free spaces permitting an easy circulation of liquid between the said working cylinder (1) and the exterior tube (6) and in all directions, so as to accelerate the elimination of heat and avert a dangerous temperature elevation.

Abstract: A logic circuit produces a direct current signal not exceeding a predetermined maximum intensity at its output terminal regardless of the amplitude of an alternating current signal applied to its input terminal. The circuit includes an AC to DC converter having an output which is non-referenced to ground, a condenser connected between the positive and negative output terminals of the converter, and a constant current generator connected between the positive output terminal of the converter and ground, the negative output terminal of the converter constituting the output terminal of the logic circuit.

Abstract: A thermal energy collector, intended for a system such as a cooling system of the solar type whose mode of operation includes a phase consisting of adsorption of a fluid by a given material and a subsequent desorption phase, comprises a compartment having an upper surface to be exposed to a source of thermal energy and a bottom surface to be connected to a duct joining the compartment to the aforementioned system, with the adsorptive-desorptive material being placed between these surfaces. To increase the efficiency of the adsorptive-desorptive material, a space is provided between the material and the bottom surface of the compartment, with a supporting layer containing openings being placed beneath the material in order to hold it in place against the upper surface.

Abstract: A method of and apparatus for discriminating sharp edge transitions produced during optical scanning, as by a CCD or the like, of differently reflective regions of a surface, such as copper conductors and resist background on printed circuit boards and similar applications, through delaying N successive sampling signals defining the edge transition of the desired edge transition regions slope and amplitude from unwanted reflections from other regions, subtracting each camera scan sampling signal from the previous Nth sample signal to produce a large difference signal only for the edge transitions, and adding such difference to the camera output signals to provide a distinctive boost to the edge transition signals which are then thresholded in a manner to insure rejection of signals from unwanted or spurious reflection regions into binary output signals unambiguously indentifying the edge transitions.

Abstract: The invention concerns a control apparatus for an arc furnace (1) comprising at least one electrode (2), and powered with direct current from an alternating current electric power source (4), through the intermediary of a controlled-rectifier converter (3).According to the invention, this apparatus includes a loop (24) for rapid control of the reactive energy drawn from the alternating current power source (4), and a circuit (15) for limitation of the maximum intensity of the direct current flowing in the electrode (2). Preferably, the rapid control of the reactive energy is obtained by holding essentially constant the product of the intensity in the source (4) and the sine of the dephasing angle. It includes in addition a loop (13) for slow control generating a reference signal of the reactive energy applied to the said rapid control loop (24), and limiting the variation of the reactive energy.

Abstract: An adjustable leveling apparatus for manhole covers, grates and the like within ground and similar structures, employing an annular extension ring received within an annular base ring having an internal ring seat, the extension ring being provided with inwardly disposed rigid bar members deformable over the ring seat to securely lock the extension ring within the base ring.

Abstract: A dynamic antenna tuning system particularly adapted for VLF frequency-shift (as opposed to on-off) keyed transmitters, employing saturable magnetic switching amplifiers providing variable tuning inductance between the antenna and transmitter and controlled to effect a gradual and not abrupt switching of the radio frequency during on-off transitions to enable narrow VLF frequency spectrum operation.

Abstract: A two terminal control switch having a main switch and a saturable current transformer whose primary winding is series connected with the main switch. A center tapped full wave rectifier has a capacitor connected between its DC sides, such capacitor also being connected to a junction between the primary winding and the main switch.

Abstract: This disclosure involves an improved thin surface-marking strip for adhering to a road surface or the like, employing novel flattened somewhat saw-tooth wedges embodying retroreflective material and of preferably substantially trapezoidal shape, with rather critical separations between wedges relative to height and length of the wedges to obviate shadow effects, provide improved daylight observation, and to increase effectiveness and life, particularly under conditions of rain-covered surfaces and snow removal.