baber/WOPTO huggingface dataset:
Patent FR-2238284-A1 (FR)
Title: Push-pull stage current control cct. - has photodiode between push-pull transistor emitters, and phototransistor connecting transistor bases
IPC: H03F3/26
Filed: 1973-07-17
Abstract: The current control circuit for push-pull stages consists of a photocoupler to contrl the push-pull current (Ip) independently of the supply and temperature variations and to allow that current to be set to any desired value. A photodiode (E) is connected between the emitters of the two push-pull transistors and is bridged by a reistor (r) and two series-coupled diodes (D1, D2). A r eference voltage (VZ) is applied to the junction between diodes. A phototransistor collector-emitter path coupled the bases of the two push-pull transistors together and acts as a variable compensating resistor. The a.c. signal (Vi) is applied to the junction between two series-coupled capacitors bridging the phototransistor.
Patent FR-2244559-A1 (FR)
Title: Anti-turbulent gas filter, esp for oxygen - with mesh strainer protecting renewable fine filter elements
IPC: B01D46/24
Filed: 1973-09-24
Abstract: Gas filter comprises a vertical cylindrical pressure vessel with a removable top and a horizontal partition dividing the vessel into upper and lower chambers; the partition supports vertical, tubular, renewable filter elements in the upper chamber with each element outlet coinciding with a perforation in the partition and a mesh strainer to protect the elements from incoming gas to be filtered. The gas inlet is positioned, horizontally in the lower chamber and the incoming gas stream is diverted upwards through 90 degrees, via a bend, to pass along the axis of a vertical tubular strainer topped by a deadend dome, directly opposite a scale-purging trap leading down from the bend to external outlet. It is used for filtering gases, esp. oxygen at pressures =40-60 bars requiring 100% removal of 80 u particles for a supply to ind. measuring equipment such as rotary counters with rotor/stator clearances of ca 100 mu. Thus the incoming gas stream does not impinge directly on the protective strainer, which can be of light construction, and does not have to be removed to change elements. No turbulence of entrained particles eliminates heating and explosion risk.
Patent FR-2241492-A1 (FR)
Title: Dry ice prodn by expanding liq carbon dioxide - through divergent spray cones into concave chamber, to slow gas down for better sepn
IPC: C01B32/55
Filed: 1973-10-01
Abstract: Dry ice is produced by expansion of liq. CO2 onto the concave surface of a chamber housed in a steel block, the chamber having a slit at the bottom covered with a curtain of dry ice to allow the discharge of the solid crystals but prevent the escape of gaseous CO2. Before expansion the liq. CO2 is passed through copper coils inside the chamber and cooled by the expanded gas. Divergent spray cones sited close to the expansion nozzles slow the CO2 gas in the chamber. Precooling gives increased conversion to dry ice and consign. of chamber leads to improved sepn. of solid crystals from gas. Unconverted gas can be liquified and recycled.
Patent FR-2210491-A1 (FR)
Title: Removing flash from plastic bottle neck - by rotating grooved neck against knife by endless belt
IPC: B29C49/74
Filed: 1973-11-23
Abstract: Appts. for separating the blow moulding flash from the cylindrical neck of a plastic bottle has a fixed knife, an endless belt, which moves parallel to the knife so that it engages with the neck, applies the base of the flash against the knife, and rotates the bottle around its axis, and devices, esp. regularly spaced grooves on the neck, and/or points projecting from the belt for preventing slipping of the belt on the neck as the bottle rotates, the pressure exercised by the belt on the neck being insufficient to deform the neck.
Patent FR-2252528-A1 (FR)
Title: Pipe joint particularly for corrosive liquids - has clamping ring on flanged pipe section welded in position
IPC: F16L23/02
Filed: 1973-11-26
Abstract: An assembly element for pipework is described, which is particularly suitable for use in chemical works and refineries involving corrosive fluids. The portion in contact with the fluid is made of the same resistant material as the pipework and the cost is less than that of conventional joints. A clamp ring (1) with bolt holes (7) holds the joint together, compressing the O ring seal (12) in the flanged mating face (11) of the junction piece (8). The junction piece is welded to the existing pipework (2) around the chamfered portion (9) and it it deteriorates, the clamping ring is re-usable since it is not permanently fixed to the pipe section.
Patent FR-2257324-A1 (FR)
Title: Catalyst for selective redn of nitrogen oxides - contg copper and alkali(ne earth) or transition metal on alumina carrier
IPC: B01J23/89
Filed: 1974-07-22
Abstract: Catalyst for the selective redn. of N oxides in gases with NH3 consists of an Al2O3 carrier contg. Cu and alkali, alkaline earth and/or transition metal(s). The catalyst can be prepd. by copptn. or kneading of Al2O3 and alkali, alkaline earth or transition metal oxide(s) or by impregnating Al2O3 with a liquid contg. alkali, alkaline earth or transition metal(s) and then heating; and then introducing Cu and small amt. of noble metal by immersion or impregnation. The catalyst pref. contain 3-10, esp. 5-8 wt. % Cu and either 4-10, esp. 5-7 wt. % Cr, Mn, Fe, Co, Ni and/or Mo or 2-25, esp. 3-22% Mg or 0.2-5, esp. 2-3% Ba or 0.1-1, esp. 0.2-0 5% K or Pr and pref. also 0.005-0.5, esp. 0.02-0.1% Rh, Ru, Pt or Pd. The catalysts are useful in the purificn. of waste gases from combustion plants, chemical factories, automobiles etc. having stable high activity over long periods and wide temp. ranges and resistance to poisoning.
Patent FR-2285515-A1 (FR)
Title: Carburettor for IC engine - giving reduced carbon monoxide content in exhaust during idling with air bypass line
IPC: F02M23/04
Filed: 1974-09-23
Abstract: Carburettor for i.c. engines has an air pipe leading from the air filter inlet directly to the mixing chamber. This passes through a spacer located below the mixing chamber and its end is bent upwards into the normal air flow, discharging near the normal butterfly throttle. There is a flow regulating valve mounted in the line. The carburettor is of use on i.c. petrol engines, esp. for motor cars. Most engines at low engine revs., particularly when idling, receive a very rich mixture from the carburettor which causes increased atmospheric pollution. In particular there is a marked rise in CO emission. This problem is overcome by increasing the amount of air fed into the mixture during the idling condition.
Patent FR-2291353-A1 (FR)
Title: Detoxification of exhaust gases - by post-combustion using a mini gas turbine for aspirating air fuel injection etc
IPC: F02M37/12
Filed: 1974-10-31
Abstract: In the neutralisation of toxic carbon monoxide from the IC of wood, coal, or hydrocarbon gas hearths and/or carbon monoxide with unburnt hydrocarbons derived from IC engines, by mixing, under compression, nitrogen, nitric oxide, carbon monoxide and water vapour and the combustible mixt. of air and hydrocarbon vapour and/or nitrogen and nitric oxide, carbon monoxide, unburnt hydrocarbons in a part combustion from which is derived a low toxicity mixture of nitrogen, nitrogen peroxide, water vapour and carbon dioxide, (a) a sound-proofed mini gas-turbine is fitted to the exhaust manifold of an i.c. engine or its extension or to a branch of the chimney of an internal hearth for the recovery, from the exhaust gases, of the kinetic energy required for the aspiration of external air, the carburettion or the injection of necessary fuel, the compression and mixing of the gases by coupling with a centrifugal compressor and an injection pump or a carburation control mechanism. Large reduction in atmospheric pollution by exhaust gases without the need for catalytic reactors for carbon monoxide and unburnt hydrocarbons.
Patent FR-2259637-A1 (FR)
Title: Indication of dirtiness of filter - implied from press. difference, with a restriction placed upstream of filter
IPC: B01D35/143
Filed: 1975-01-31
Abstract: A device for indicating the dirtiness of a filter, by implication from the press. drop across it, consists of a diaphragm enclosed between two chambers and attached to a small coaxial piston in a sealed chamber. The upward movement of the diaphragm is recorded by a rod which remains in the highest position to which it is pushed by the piston. A restriction is placed upstream of the filter and the pressures before and after the restriction are applied to the upper and lower sides of the diaphragm. The press. downstream of the filter is applied to the piston. The movement of the diaphragm is not strongly dependent on the fluid flow rate through the filter.
Patent FR-2299027-A1 (FR)
Title: 2-Phenethylimino-pyrrolidine derivs - prepd by reacting 2-ethoxypyrrolinium fluoborates with phenethylamines
IPC: C07D207/22
Filed: 1975-02-03
Abstract: Pyrrolidine derivs. of formula (I): (where Ar is phenyl substd. by >=1 1-8C alkyl or alkoxy gp. or a methylenedioxy; R1 is hydroxyethyl or hydroxypropyl; and R2 is lower alkyl, lower alkenyl, cyclopentyl or cyclohexyl), e.g. 2-/ (3,4-diethoxy-beta-methoxyphenethyl)imino /-1-pyrrolidineethanol, their (+)- or (-)2 isomers, and their salts with acids are new cpds. (I) are useful as ganglionic blockers and as hypotensives. They are also useful for the treatment of tachycardia and cardiac arrhythmias. 2-/ (3,4-Diethoxy-beta-methoxyphenethyl)imono/-1-pyrrolidineethanol. (I) are prepd. by reacting a fluoborate of formula: (II) with a phenethylamine of the formula H2NCH2CH(OR2)Ar (III) in a solvent (pref. a lower aliphatic alcohol, an ether, a halogenated lower alkane or an aromatic hydrocarbon), converting the resulting fluoborate of (I) into the free base, and opt. converting the base into a salt with an organic or inorganic acid. The product may be resolved into its (+)- and (-)-isomers. The reaction of (II) with (III) is pref. carried out at 0-30 degrees C.
Patent FR-2264844-A1 (FR)
Title: Expansible plastic mass or moulding powder - contg. mixt. of styrene polymer, ethylene polymer, homogeniser, and blowing agent
IPC: C08J9/14
Filed: 1975-03-18
Abstract: Expansible plastic mass or moulding powder, esp. for prodn. of building panels, contains (I) a thermoplastic mixt. of (a) a styrene polymer, (b) an ethylene polymer and (c) a homogeniser, and (II) a blowing agent. Good mechanical properties, esp. tensile strength and impact resistance, and good resistance to solvents e.g. toluene and ethyl acetate.
Patent FR-2308149-A1 (FR)
Title: Radar intruder alarm and detection system - has all circuits and autonomous supply in housing which can be disguised with publicity material or similar
IPC: G08B13/24
Filed: 1975-04-15
Abstract: The independent supply, radar intruder alarm and detection system has the regulation, amplification and alarms circuits etc. contained in one housing. The housing also encloses a transformer and batteries. It is closed by a door whose front face can be used as a photograph frame or publicity support which hides the housing. The small box containing the radar circuit is arranged in the box opposite a window, formed in a support plate forming the rear non-visible part of the door. The transmission and reception transducers of the radar are orientated towards the window.
Patent FR-2311304-A1 (FR)
Title: Blood testing apparatus measuring time sedimentation rate - uses photographic emulsion and light source controlled by timer
IPC: G01N15/05
Filed: 1975-05-14
Abstract: Apparatus for measuring the sedimentation rate of blood samples which uses a classical tube or pipette (1) for the measurement, includes one or more light sources (6), an optical system, photosensitive elements, and associated electrical systems. The photosensitive elements (10) consists of a photographic emulsion whose sensitivity corresponds to the spectral radiation from the light source. This is positioned to receive this radiation after it has passed through the tube is which a sample of blood has been placed. The light source is supplied with electrical energy produced by an electrical system with a classical switching system associated with a timer.
Patent FR-2312199-A1 (FR)
Title: Sugar coating of food by spraying liquefied droplets - using hot air carrier through nozzle in rotating drum
Inventor: MOCHIZUKI KEIZO
IPC: A23G3/00
Filed: 1975-05-26
Abstract: Sugar icing or sweetmeat is applied to food such as nuts, biscuits or sweets by spraying the liquefied sugary mass through a nozzle over the articles in a revolving drum, coating drum or in a fluidized bed. The liquefied droplets are produced by blowing hot compressed air into a fused sugary mass, obtd. by boiling down, or by melting extremely fine sugary particles in a hot air stream in a fusion zone. This coats concave recesses in the food as well as plane and convex areas without redn. of quality. The new process can be applied by using conventional equipment. The process is suited for continuous or for intermittent batch production.
Patent FR-2311727-A1 (FR)
Inventor: LATAIX GILBERT
IPC: A61J1/20
Filed: 1975-05-21
Abstract: The container has two tubes opposite each other and axially in line. One tube is rigid and contains one of the products; the other tube is supple and flexible and contains the other product. Both are joined together by an exterior locking ring, open ends together and separated by a dividing membrane. Inside the flexible portion is a piercing plunger, this having a rounded head and cutting teeth. To mix the products, the flexible tube is pinched together behind the plunger; this moves forward and pierces the membrane. No exposure to the atmosphere is necessary, sterile conditions being maintained.
Patent FR-2317244-A1 (FR)
Title: Silica glass tubular parison with internal metal oxide coating - for subsequent processing to optical fibre
IPC: C03C13/04
Filed: 1975-07-11
Abstract: A tubular parison of SiO2 glass having a gradient of refractive index decreasing radially outwards is prepd. One or more working passes are applied to the internal surface of a tube of pure Si. Each pass comprises a disposition phase in which a layer of doping oxide is deposited inside the tube by heating inside the tube a source of the corresponding metal of the oxide and producing in the tube an oxidising atmosphere under controlled pressure. Process avoids the problems associated with having a thin core and drawing down outer layers. The doping can be accurately controlled.
Patent FR-2282304-A1 (FR)
Title: Underfloor heating resistor mat - is manufactured by laying resistor wire in zigzag pattern and joining portions of wire with tape
IPC: B21F27/12
Filed: 1975-08-22
Abstract: The underfloor heating mat consists of an insulated wire laid in a zigzag pattern; the wire is curved round a small radius at the ends of the zigzag and the straight portions of the zigzag are held at the desired spacing by flat insulating bands. Special rollers with 'U' shaped teeth on the first roller fitting into 'U' shaped cutouts on the second roller are used to form the bands so that the heating wires can fit into the resulting 'U' shaped bends. The crossing places are potted in plastics to form a firm joint. A shuttle device moving in a figure-of-eight pattern is used to lay the heating wire on a moving conveyor.
Patent FR-2283310-A1 (FR)
Title: IC engine valve cooling system - partic slow speed engines, uses evaporation condensation system with forced cooling of valve cage(NL-2.3.76)
IPC: F01L3/14
Filed: 1975-08-29
Abstract: In a system for cooling valves, partic. exhaust valves for internal combustion engines, which have a hollow, outwardly closed valve stem partly filled with a heat transport liq. which is pref. diphenyl or diphenyl oxide as well as forced circulation cooling in the cylinder head, which carries away heat supplied to the valve, the improvement whereby the evapn. temp. of the heat transport liq. in the hollow valve stem is below that prevailing at the valve disc during operation, while its condensing temp. is above that prevailing on the cooled valve stem. More esp. with i.c. engines operating on heavier oils e.g. diesel engines, thermal corrosion of the valve seat due to the presence of Na, V, and S. compds. in the oil and sulphuric acid corrosion of the valve stem due to the SO3 and H2O condensing from the exhaust gases, is eliminated so that the exhaust valves have a much longer life and maintenance costs are reduced.
Patent FR-2322328-A1 (FR)
Title: Compact folding perambulator frame - has pivoted handle extensions on Frames laterally connected by folding cross braces
Inventor: LAUNE PIERRE
IPC: B62B9/14
Filed: 1975-08-29
Abstract: The frame is composed of tubular main elements cross linked by folding linkages. Each side of the frame comprises one long member terminating in a handle at one end and having a wheel spigot at the other, and one short member hinged at mid length to the long member. The hinge point is such that the frames are X shaped, carrying wheels at the bottom ends. Two folding cross braces connect the two X frames laterally and in addition the handle section extension of the X is pivoted to fold parallel along the bottom portion. The form of the X frame is maintained by tubular "arm rests" hinged to the long members and snap fitted to the tops of the short members.
Patent FR-2330578-A1 (FR)
Title: Railway points operating system - uses lever recessed in rest position and activating track shifting rocker mechanism
IPC: B61L5/00
Filed: 1975-11-07
Abstract: The railway points use a counterweight or a rocker with a reversible spring system operated by the vehicle. A pivoting (22) lever acts on an intermediate element (17, 20) which is displaced to a position where it operates a rocker system (5). The rocker system in turn manoeuvres the tracks via a shaft (11). The intermediate element is retracted by a return spring (27) from the rocker cam (6, 7) when the lever is in a horizontal rest position. The lever is recessed when at rest. It may operate the points in alternate senses each time it moves.
Patent FR-2331709-A1 (FR)
Title: Nut for projection welding - has top portion recessed to prevent electrode damage and threads deformed locally to provide locking action
IPC: F16B37/06
Filed: 1975-11-17
Abstract: The nut (1) is fitted to sheet metal by projection welding. It comprises a body (4) of any suitable outer shape, with radial projections (14) on its undersurface. These are spaced around a central spigot (15), used for centring in the hole. The top face (7) of the nut is recessed (8) around the threaded portion, to prevent damage by the welding electrode. In this recessed area, the thread (12) is deformed locally (13) in several places spaced around the top of the thread. This deformation may partially extend into the thread below. When a screw or bolt is inserted, a locking action is provided to prevent loosening.
Patent FR-2295430-A1 (FR)
Title: Voltage level indicating instrument with battery and test probes - uses light emitting diodes and input signal via attenuating resistor and diode
IPC: G01R31/02
Filed: 1975-12-03
Abstract: Voltage level indicating instrument of the type which only shows whether an unknown voltage is larger or smaller than a predetermined value. The circuit contains three transistors (10, 11, 12) and a battery (14) with a switch (16) which can be of the push button type, a set of indicators such as light emitting diodes (18, 20) and biasing resistors (22-27). The battery can be selectively connected to the light emitting diode to provide a current source. Circuit also incorporates a check for the battery voltage. There are test probes (30, 36) linked to the instrument via a cable (32). The input signal is via an attenuating resistance (22) and a blocking diode (34).
Patent FR-2339761-A1 (FR)
Title: Compressor with outer housing and meshing rotors in inner housing - has valve at outlet controlling effective rotor length and thus output
IPC: F04C28/12
Filed: 1976-01-27
Abstract: Compressor (1) has an outer housing (2) with inlet (3) and outlet (4), an inner housing (5) with inlet (7) and outlet (8), and a chamber (6) between the housings. A pair of meshing rotors (9) are carried in the inner housing and there is an outlet connection (13,2a) between the outlets of inner and outer housings. This connection contains a wall (13) which bridges the chamber and a portion (2a) of the outer housing wall. An axially movable valve (14) is provided which varies the effective length of the rotors and which is operated by an actuator (15) via an axially movable rod (16) extending outside the outer housing through a seal (17) in the wall portion (2a).
Patent FR-2339953-A1 (FR)
Title: Thin silicon films made for surface barrier diodes - and mfr. of nuclear particle detectors using the diodes
Inventor: TETEFORT ANNE
IPC: H01L31/118
Filed: 1976-01-29
Abstract: Thin, n-type Si films are made from a thick monocrystalline n+ rype Si wafer (1) covered by a thin epitaxial layer (2) of n-type Si, and then using the steps:- (a) Layer (2) and part of wafer (1) are masked, esp. by an inert jig leaving only a central zone of wafer (1) exposed for electrolytic etching with a soln. contg. fluoride ions where the wafer forms the anode with a potential lower than that at the start of electropolishing w.r.t. a reference electrode; etching is stopped when the current drops, leaving a matte surface on a zone of layer (2) exposed by removing part of the wafer. (b) Slow chemical etching in the absence of air, using a soln. contg. HF, an oxidant, and a moderator; (d) washing with de-ionised water in the absence of air. In step (a) the anode potential is pref. controlled and at least the final stage conducted in darkness. Exact control of the etching process (a) and subsequent stages in mfg. the diodes and detectors of nuclear energy, esp. the loss dE/dx, e.g. detecting alpha rays emitted by Am.
Patent FR-2340696-A1 (FR)
Title: Boot with removable over shoe - has pivoting back part held on boot by elastic cord
IPC: A43B3/02
Filed: 1976-02-13
Abstract: The boot (1) has a removable over shoe (3) which encloses it at least at the toe (5) and the heel. The back part of the over shoe, which covers the heel of the boot, pivots around a transversal axle (7). This back part is held against the heel by an elastic cord (13) connected to the shoe. The shoe has two tongues (8), partly vertical, which join at the level of the junction of the instep and the leg of the boot. The elastic cord passes through the pivoting back part and surrounds the instep and its extremities are attached to the tongues.
Patent FR-2348867-A1 (FR)
Title: Single cheese drainage vessel - with bottomless ring of flexible material for holding cheese during drainage of whey
IPC: B65D85/76
Filed: 1976-04-22
Abstract: The ring is pref. formed from a lamella of thin synthetic plastic material, at the ends of which are slots for mutual engagement of the ends to close the ring which has a circular section. In the surface of the ring are perforations to facilitate drainage. The cheese is produced by pouring it into the vessel mounted on a plate. After drainage, a pot with a depth equal to the height of the vessel is placed over the vessel, the whole assembly is turned upside down, and the pot is covered with a lid to finish treatment.
Patent FR-2356662-A1 (FR)
Title: Tris-perfluoro-alkyl phosphine oxides prepn. - by electrochemical fluorination of trialkyl phosphine oxides, use as solvents, complexants, etc.
Inventor: YAGUPOLSKY L M
IPC: C07F9/53
Filed: 1976-06-30
Abstract: The novel-tris-(perfluoroalkyl)-phosphine oxides are of formula (I) (RF)3P=O (I) (where RF is opt. branched 2-8C perfluoroalkyl). E.g. Tripopyl phosphine oxide is electrochemically fluorinated in anhydrous HF to give perfluoropropylphosphine oxide. As solvents for rare earth metal salts; complexants in the sepn. of useful heavy metals in non-aqs. media; as oleohydrophobic substances in the prepn. of flame-repellant compsns., raw materials for the prepn. of surfactants.