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| Number | Title | Issue Date |
| 4791424 | Doppler radar kinemometer The invention concerns a Doppler radar kinemometer intended to measure the speed of a railway vehicle. According to the invention, it includes two antennas (1,2) mechanically connected to one another such that their axes form a determined angle between th... | 12/13/1988 |
| 4778098 | Process for mechanical/welded assembly of chassis elements for railway vehicles The invention concerns a process for assembly of the end of a girder (16,18',18",20', 20"and the associated region of a crossbrace (10,12), constituting components of the chassis end of a railway vehicle, with the girder and crossbrace each comprising at ... | 10/18/1988 |
| 4765395 | Device for the continuous production of heat and cold A device for continuous production of heat and cold comprises a combination of an external heat source (10), at least first and second units (1, 2) each of which operates by using different solid-fluid adsorbent-refrigerant pairs, and each of which includ... | 08/23/1988 |
| 4755349 | Mechanism for anti-seismic connection between the pump base and the dome of a nuclear power station A mechanism for anti-seismic connection between the pump base and the dome of a nuclear power station is characterized by the fact that the pump base (1) is equipped externally with a flange (3) seated with a slight axial play and significant radial play ... | 07/05/1988 |
| 4748660 | Process for determination of the last intermediate node in a network of numerous interconnected nodes The present invention concerns a process and a circuit enabling determination of the last intermediate node of a pathway comprising a minimum number of nodes from the m-th node to the n-th node in a network comprising p nodes interconnected by a number of... | 05/31/1988 |
| 4746812 | Process for control of the instant of opening of an interrupter, and corresponding logic circuit The invention concerns a process for control of the opening of a power interrupter, especially a transistor, at a determined instant, regardless of the particular characteristics of the interrupter. According to the invention, the emission of the normal c... | 05/24/1988 |
| 4739631 | Adsorption-desorption thermic machine 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 ... | 04/26/1988 |
| 4733331 | Heat dissipation mechanism for power semiconductor elements 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... | 03/22/1988 |
| 4731832 | Process and apparatus for control of a hands-free telephone set operating in alternation between sending and receiving 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 inverte... | 03/15/1988 |
| 4725939 | System for supply of direct current to at least two electrical loads with a common polarity, in particular for multiple electric arcs 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... | 02/16/1988 |
| 4710721 | Apparatus for monitoring the period of separation of impulses 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 p... | 12/01/1987 |
| 4702356 | Elastic compensation chamber for hydraulic energy dissipator 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 ... | 10/27/1987 |
| 4701632 | Logic circuit producing a direct-current output signal of determined maximum intensity 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 ... | 10/20/1987 |
| 4697433 | Thermal energy collector 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... | 10/06/1987 |
| 4691325 | Control apparatus for a direct current arc furnace 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... | 09/01/1987 |
| 4686836 | Thermal energy collector and system including a collector of this kind 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 ... | 08/18/1987 |
| 4680586 | Generator capable of producing multiple signals with different frequencies and a transmitter which includes a signal generator of this kind In accordance with the present invention, a signal generator providing multiple signals with different frequencies includes, in a combined form, a clock (1), an address counter (2), a memory (3), and a digital-to-analog converter (4), which are to be seri... | 07/14/1987 |
| 4677316 | Logic circuit with threshold and built-in safety The invention pertains to a logic circuit with threshold and built-in safety such that any change in the characteristics of its components produces a relative increase of the threshold value. It comprises a comparator (7) one input of which receives a ref... | 06/30/1987 |
| 4670667 | Series-connected power transistors A balancing circuit (2) comprising two windings (L1) and (L2) detects a current (Ids) between the common collector-to-emitter junction of two power transistors in series and the common junction of two balancing capacitors connected across the transistors ... | 06/02/1987 |
| 4668037 | Hermetic passage for an enclosure, especially a housing for semiconductors An electrical passage for an hermetic enclosure including electronic elements comprises a conducting piece (2) traversing an insulating sleeve (3) bearing on the inner surface (1) of the enclosure. A ring (7) surrounds the conducting piece (2) and a porti... | 05/26/1987 |
| 4649469 | Interface for connecting a computer system to an activator module This invention is concerned with an interface for a computer system. This interface is characterized in such a way that it includes an assembly of elements (C2, C2') capable of performing an AND function, controlling modules (K1, K1') for monitoring the f... | 03/10/1987 |
| 4641234 | A-C or D-C to D-C converter for dual current locomotives with D-C motors The present invention relates to supplying a load either from a direct-current source or from an alternating-current source. The power unit, according to the invention, is characterized in that it consists of a single conversion unit (CV) having unidirect... | 02/03/1987 |
| 4636660 | Fail-safe "AND" gate using capacitor discharge through a transformer The invention involves an "AND" logic circuit with built-in safety comprising a first and a second input to which pulses can be applied, and respectively tied to the base of a first and a second transistor (1,2) each having a collector to which a referenc... | 01/13/1987 |
| 4636917 | Precalibrated element for securing and locking semiconductors and heat sinks arranged in alternating rows In electrical apparatus of the type having a column of stacked semiconductors and interposed heat sinks mounted between a pair of end plates, a precalibrated clamping element is provided for applying a predetermined clamping force to one end of the column... | 01/13/1987 |
| 4621170 | Means of transmitting signals along a line while also providing a direct voltage source A transmission configuration between a main station and a local station consists of a line which permits supplying of direct voltage power for stations from a source within the main station. A rectifier bridge is installed in such a manner that suitable p... | 11/04/1986 |
| 4555791 | Method and apparatus for determination of the state of an all-or-none modulated alternating signal in a perturbed environment The state of an all-or-none modulated useful signal subjected to a perturbed environment is determined, on reception, through the use of non-modulated reference signals subjected to the same environment. The reference signals have respective frequencies n... | 11/26/1985 |
| 4531384 | Solar-powered refrigeration unit The invention pertains to refrigeration units which operate by means of heat energy, and especially solar energy, wherein the mode of operation consists of a desorption phase and an adsorption phase. The energy collector (8) contains a material (10) with ... | 07/30/1985 |
| 4529168 | Double shut-off valve which provides perfectly tight sealing The present invention pertains to a double shut-off valve device which is specifically intended to eliminate the consequences of erosion and the resulting lack of perfectly tight sealing. This device consists of two concentric valve components, namely an inner... | 07/16/1985 |
| 4515495 | Linking arrangement for a shaft and a fly-wheel A linking arrangement for a shaft and a moving part, such as a fly-wheel, rotating about the same axis includes two coaxial rims fastened to the shaft and moving part, respectively, with radial notches situated on opposed surfaces of the rims that are fix... | 05/07/1985 |
| 4449685 | Coupling for inducing a current in the rails of a railroad track The purpose of the invention is to reduce the total power consumed by a coupling for inducing a high-frequency alternating current in the rails of a railroad track for the purpose of transmitting information to trains traveling along the track. According ... | 05/22/1984 |
| 4442988 | Information transmission device through the rails between a railway track and a vehicle assembly circulating on this track An improvement in apparatus for the secure transmission of information through rails in zones of propagation independent from the sections of the track block-section system embodying the use of series resonant circuits tuned to the information carrier fre... | 04/17/1984 |
| 4417823 | Hydrostatic guide bearing of a seat This disclosure is concerned with improvements in hydrostatic guide bearings of a shaft in which the journal of the shaft takes on the form of a sleeve and the bearing comprises a first and a second set of chambers placed within concentric races respectiv... | 11/29/1983 |
| 4408470 | Procedure and device for rolling metals without stress The invention involves a procedure having three key stages: In the first stage, just prior to the introduction of the metal into stand (n+1), the value of the rolling torque in stand (n) is determined and recorded. Then, in the second stage, when the meta... | 10/11/1983 |
| 4405888 | Adapter for intermediary circuit of a static converter assembly The invention concerns the transformation of alternating or direct current input power to alternating current output power with intermediary transformation in direct current by means of static converters. According to the invention, an adapter placed in the di... | 09/20/1983 |
| 4396302 | Hydrostatic bearing with security of function In a hydrostatic bearing for pumps of fluid under pressure which is supplied by the pumped fluid, the operation of the bearing is ensured regardless of the conditions present in the pump. To this end, the nozzles of fluid supply of the openings of the race ... | 08/02/1983 |
| 4381126 | Hydrostatic bearing with rotating sleeve The invention concerns hydrostatic bearings supplied with fluid under pressure for a shaft rotating at high speed in a fixed bed, with the goal of reducing the power dissipated by shear of the fluid in the said bearings. According to the invention, a slee... | 04/26/1983 |
