baber/WOPTO huggingface dataset:
Patent GB-1498399-A (GB)
Title: Conductive probe level control
IPC: G01F23/24
Filed: 1976-11-11
Abstract: 1498399 Liquid level control ITT INDUSTRIES Inc 11 Nov 1976 [17 Nov 1975] 46972/76 Headings G1H and G1N A liquid level control system comprises a probe sensing the presence of a conducting liquid; an A.C. relay 28 whose output provides a control signal and a gate controlled rectifier 20 with its main electrodes in series with the coil 26 of the relay and with the secondary winding 18 of an isolating transformer 12; the probe being connected to the rectifier gate whereby the relay is energized only whilst the probe is immersed in liquid. In this condition relay contacts 28a, 28b are respectively closed and open. As shown, used with a water boiler, the burner is then operated but the alarm is not actuated. When the level drops and the probe is no longer immersed contacts 28a are opened to stop the boiler whilst contacts 28b are closed to actuate the alarm. The provision of a diode 30 ensures that if the rectifier 20 fails and becomes permanently conductive the current is sufficient to melt fuse 22. The system includes a jump wire 24 which may be replaced by a third pair of contacts which are opened when the liquid level drops; this ensures that the burner remains off and the alarm on even if the liquid level rises. The system may include a second probe which senses an upper liquid level; the system then controls a pump to maintain the liquid level within desired limits.
Patent GB-1039123-A (GB)
Title: Improvements in or relating to the application of identification sleeves to cables
Inventor: RICE SAMUEL
IPC: H01B13/34
Filed: 1962-12-13
Abstract: 1,039,123. Identification means. HELLERMANN Ltd. Dec. 13, 1963 [Dec.13, 1962], No. 47101/62. Heading D1T. [Also in Divisions F2 and H1] In a method of applying one or more flexible identification sleeves 24, Fig. 5 to a cable 25, they are first expanded over the metal shaft of a hand tool 21, after which the end of the cable is passed along an axially extending groove 23 in the shaft and threaded through the sleeves. The cable may then be removed together with the sleeves, which contract upon it. The hand tool is used with a sleeve dispenser, Figs. 1 and 2, as described in Specification 1,039,122. In use, the pointed end 20 of the hand tool is inserted in a concave opening 2 in the lower end of a support member 1 and is guided towards an aperture 3 where it enters a smaller aperture 5 formed between the two hinged and spring-loaded nylon plates 4, which are forced apart. Further movement causes a spring-loaded bush 7 to be pushed back, carrying the end of a bifurcated lever 8 with it as it turns about a pivot 9. The other end of lever 8 enters between the rearward ends of scissors levers 13 causing them to open and, at their forward ends, release the chain of sleeves contained in a tube 11 so that they drop until arrested by the upper edges of converging guide plates 14. The hand tool is withdrawn from opening 2, enabling jaws 12 to grip the chain of sleeves just above the last, and is then inserted between the guide plates 14 so that the pointed end enters the last sleeve from below. This sleeve is then severed from the chain by twisting the hand tool, and is carried away on its point. The hand tool is returned to opening 2 and the point is pushed in aperture 5, when the edges of plates 4 engage the end of the sleeve, which is forced along the shaft and over groove 23 as the hand tool is advanced. The setting of guide plates 14 may be arranged so that more than one sleeve is removed each time.
Patent GB-1397579-A (GB)
Title: Polytetrafluoroethylene coatings on glass fabrics
IPC: C03C25/30
Filed: 1972-05-24
Abstract: 1397579 Coated glass fabric and fibres EI DU PONT DE NEMOURS & CO 24 May 1972 [25 May 1971 15 May 1972] 47170/74 Divided out of 1397578 Addition to 1397578 Heading B2E A glass fabric and fibres have a coating comprising a base coat of the condensation product of a polyhydrolysable compound (defined) which is a compound of tetravalent titanium, zirconium or tin and a top coat of an unsintered fine powder polytetrafluoroethylene having an apparent melt viscosity at least 1 x 10<SP>9</SP> poises at 380‹C. Preferably the hydrolysable compound has at least 3 hydrolysable groups, particularly four such groups. The hydrolysable compound may be applied from an organic medium or, unless the degree of hydrolysis is too great, from an aqueous medium. The hydrolysis may require heating. The polyhydrolysable compound may be an acylate of orthotitanic acid or titanium lactate. The polytetrafluoroethylene may be applied as an aqueous dispersion which may contain a surfactant and/or a water-repellent Suitable additives are a fluorinated acrylate or methacrylate polymer. The fabric may have a size e.g. starch.
Patent GB-1377690-A (GB)
Title: Power supplies for plasma arc systems
IPC: H02M7/12
Filed: 1972-10-17
Abstract: 1377690 Power supplies for plasma arc systems INSTITUT ELEKTROSVARKI IMENT E O PATONA AKADEMII NAUK UKRAINSKOI SSR 17 Oct 1972 47796/72 Heading H2H  A power supply for a plasma arc system comprises a transformer 4 having secondary windings 5 connected to a rectifier circuit 7 for supplying current to an arc between an electrode 8 and a workpiece 9, and secondary windings 6 connected to a capacitor 11 via a rectifier circuit 10 so that the arc current increases smoothly as the capacitor becomes charged. The primary windings 3 of the transformer are connected to a three-phase inductivecapacitive current stabilizer 1. Initially contacts 2 are closed, a contact 13 is opened and a circuit 15, comprising a low power D.C. source and an oscillator, strikes an ionizing arc between the electrode 8 and a nozzle 14. Since the total current is stabilized by the circuit 1, the gradual decrease of the charging current for the capacitor 11 ensures a gradual increase in the arc current supplied by the windings 5.
Patent GB-1246400-A (GB)
Title: Stabilization of olefin polymers
Inventor: BRANCHESI MILLO
IPC: C08K5/00
Filed: 1969-09-30
Abstract: 1,246,400. Stabilizing polyolefins. MONTECATINI EDISON S.p.A. 30 Sept., 1969 [30 Sept., 1968], No. 47885/69. Heading C3P. Crystalline olefin or aryl-substituted olefin polymers are stabilized with up to 5 weight per cent of a stabilizer composition comprising (a) an ester of thiodipropionic acid or di-(hydroxyethyl)sulphide, (b) a phosphite of formula wherein X is O or S and R, R<SP>1</SP> and R<SP>11</SP> are alkyl, aryl or alkylaryl groups, (c) a phenolic antioxidant of formula wherein R<SP>1</SP> and R<SP>11</SP> are as defined and R<SP>111</SP> is an alkyl group with a C 12-30  linear chain, (d) a phenolic antioxidant of formula wherein R<SP>1</SP> and R<SP>11</SP> are as defined and R<SP>111</SP> and R<SP>iv</SP> are alkyl groups, and (e) a metal soap. The polymer may be derived from ethylene, propylene, butene-1, 4-methylpentene-1 and styrene. Specified components are (a) dilauryl and dioctadecyl thiodipropionate, and thiodiglycol dilaurate and dioctadecanoate; (b) trilauryl, trioctadecyl didecyl phenyl and trinonylphenyl phosphite, and trilauryl thiophosphite, (c) and (d) phenolic antioxidants in which R<SP>1</SP> and R<SP>11</SP> are methyl, ethyl and butyl with alcohol residues derived from lauryl, hexadecyl and octadecyl alcohols, and (e) calcium and magnesium stearates. The compositions may contain conventional stabilizers, opacifiers, and colorants and may be made into fibres. Nitrogen containing polycondensates may be incorporated to improve dyeability.
Patent GB-1112471-A (GB)
Title: Device and process for casting plastic pipe
IPC: B29C48/10
Filed: 1965-11-12
Abstract: Pipes are continuously centrifugally cast from a monomer mixture which may include a reinforcing agent and a coupling agent therefor and which is introduced into one end of a rotated lubricated cylindrical tube mould and continuously withdrawn from the other end as a polymerized pipe (see Divisions B4-B5). The monomer mixture may comprise molten e  - caprolactam, mullite, 3 - aminopropyltriethoxy - silane, decyltriethylsilicate and water, which is heated at 150 degrees under slight vacuum after which toluene diisocyanate is added at 115 DEG  C. and then ethylmagnesium bromide in diethyl ether whereupon, after applying vacuum to remove ether and ethane, the mixture is fed into the mould. Alternatively, the monomer mixture may comprise molten e -caprolactam, a polyfunctional isocyanate and sodium hydride, or molten e -caprolactam, wollastonite (or feldspar), methyl 11-trimethoxysilylundeconate and polyfunctional isocyanate, After heating under vacuum and cooling, 2 parts of sodium hydride is added whereupon the mixture is cast at 150 DEG  C. after vacuum treatment.  Another monomer mixture used comprises wollastonite treated with 3-methacrylatopropyltrimethoxysilane, methyl methacrylate, cumene hydroperoxide, trimethylolpropane trimethacrylate and mixtre of triethylborane, pyridine and an ethylene oxide-alkylphenol condensate.  In a further process, a mixture of methyl methacrylate, cumene hydroperoxide, trimethylolpropane trimethacrylate and a combination of triethylborane, pyridine and ethylene oxide-alkyl phenol condensate is polymerized in the mould in an aqueous solution of sodium nitrate.
Patent GB-1060950-A (GB)
Title: Improvements in or relating to time division switching systems
IPC: H03K17/76
Filed: 1965-11-18
Abstract: 1,060,950. Multipled pulse signalling; automatic exchange systems. WESTERN ELECTRIC CO. Inc. Nov. 18, 1965 [Dec. 24, 1964], No. 48983/65. Headings H4K and H4L. In a time division switching system comprising a common time division bus and selectively operable gates for periodically connecting each of the communication paths to the bus for a sampling interval, a common amplifier is included in the bus so that the stray capacitance is divided into two parts, the amplifier having low input and output impedances to provide discharge paths for the stray capacitances, thus reducing cross-talk. Fig. 1 shows one of the communication paths, an input signal at 10 being supplied via a low pass filter 12, terminated by a resistor 13 equal to the characteristic impedance of the filter, and a diode gating circuit 14 to the time division bus, similar gating circuits being connected at 22, 23 &c. The T.D.M. signals are supplied via the common amplifier 25, which may be arranged to provide some gain, to diode gates 28 &c., each gate providing an input via a resonant transfer circuit 35, 37, hold amplifier 38, and low pass filter 39 to the appropriate output. Resistor 36 may be adjusted to compensate for the low pass filter characteristics. Amplifier 38 has a high input impedance to hold the voltage on capacitor 37 between samples. Transistor circuitry for amplifiers 25 and 38 is described.
Patent GB-1383066-A (GB)
Title: Apparatus for selecting video signal samples
IPC: H04N7/36
Filed: 1972-10-25
Abstract: 1383066 Television WESTERN ELECTRIC CO Inc 25 Oct 1972 [26 Oct 1971] 49169/72 Heading H4F In a redundancy reduction system for transmitting a television signal over a narrow band link, wherein each framed video signal is sampled, the difference amplitude between succeeding samples is digitally encoded and each so produced differentially pulse coded sample (D.P.C.S. on line 101) is compared (104/ 108) with the like sample occurring in the previous frame at the same location, to detect any movement at the location and thereupon cause transmission of the new sample, the step of pulse coding the difference between succeeding samples can cause corresponding D.P.C.S. of successive frames to be different even if there has been no interframe movement. The resultant unnecessary sample transmission is seen as noise, unnecessarily filling up stores &c. The noise to be expected from a D.P.C.S. can be predicted by inspecting the size of the step to the next quantization level in the coding system e.g. if 4 amplitude steps are needed to cause the coded valve to increase by one unit, then twice as much noise is possible than if 8 steps are needed. A weighting generator 103 thus weighs each D.P.C.S. according to said step and gives an expected noise indication at 129. The output of the frame to frame comparator 106 (movement indicator) is summed in spatial integrator 113 for a group of six sample points three consecutive points in one line and the three corresponding (vertically aligned) points in the next line. The average value of the six outputs is taken to give an indication of the average movement in the group. If the output for any sample point is due to actual movement, movement will probably be detected at the other sample points and a large average movement will be indicated. If the output is due to noise, then the outputs at the six points will vary at random and a low average movement will be indicated. A second spatial integrator 117 determines the average noise to be expected for the group of six points and this is subtracted at 116 for the absolute value of the detected average movement, to give a noiseless movement indication. Movement indication signals over a predetermined area are compared in threshold circuit 120 with a threshold, and an "over threshold" indication caused an output signal at 112 indicating that a new sample should be transmitted.
Patent GB-1479151-A (GB)
Title: Device for measuring the relative concentration of a component in a fluid
IPC: G01N27/30
Filed: 1974-11-13
Abstract: 1479151 Solid electrolyte sensor THOMSON-CSF 13 Nov 1974 [16 Nov 1973] 49187/74 Heading G1N A solid electrolyte sensor comprises a solid electrolyte wall 2 of thickness 100-1000 Šngstroms with an electrode, 1, 3 on each side, the wall/electrode assembly being deposited on a porous substrate 4. The sensor may be used to measure a gas e.g. oxygen in a liquid or gas mixture and may be formed on the end of a 1-3 mm. diameter tube for measuring blood oxygen. The solid electrolyte may be zirconium dioxide or thorium oxide doped with alkali metal oxide, alkaline earth metal oxides or rare earth oxides, preferably of lanthanum or yttrium. It may be made into the wall by vaporization under vacuum, cathode sputtering, cracking or electro-chemical techniques. The electrodes are porous and may be made by thin film deposition so as to leave enucleated portions. They may be made from silver, platinum, gold, copper or iridium. The porous substrate may be alumina.
Patent GB-1380638-A (GB)
Title: Preparation of stannous chloride
IPC: C01G19/06
Filed: 1972-10-25
Abstract: 1380638 Stannous chloride VULCAN MATERIALS CO 25 Oct 1972 [16 Nov 1971] 49272/72 Heading C1A Stannous chloride dihydrate is made by reacting tin metal and stannic chloride with at least 4 moles of water per mole of tin metal at a temperature of 35‹ C. to 250‹ C. until at least 95% of the tin is consumed. Anhydrous stannous chloride may be produced by dehydration of the dihydrate. The amount of water is preferably 4 to 7 moles of water per mole of tin metal and the water may be added as stannic chloride pentahydrate and no additional water added. At the completion of the reaction the unreacted tin is physically separated by decantation.
Patent GB-1087022-A (GB)
Title: Improvements in and relating to feedstuff mixers
IPC: B01F13/10
Filed: 1964-12-03
Abstract: 1,087,022. Mixing granular materials. J. A. HOBBS. Nov. 29, 1965 [Dec. 3, 1964], No. 49273/64. Heading B1C. [Also in Divisions B8] Feeding materials-A feeder for an animal foodstuff constituent comprises a first hopper 18, Fig. 4, discharging into a second hopper 1 feeding a screw conveyor 3, the aperture 19 being larger than that 20, and an inverted V-section guard being arranged below the aperture 19. The screw conveyor may be driven by an electric motor through a reduction gearbox and a variable transmission of double sliding V-belt pulley type, see Figs. 1-3 (not shown). Mixing-Mixed foodstuff may be prepared by the apparatus of Fig. 5 which shows grain from hopper 27 passing through rollers 28 and mixing with a stream of concentrate fed by che apparatus of Figs. 1-4.
Patent GB-1202277-A (GB)
Title: Improvements in or relating to disc brakes
IPC: F16D65/18
Filed: 1967-10-31
Abstract: 1,202,277. Brake pistons and cylinders. ALFRED TEVES G.m.b.H. 31 Oct., 1967 [15 Nov., 1966], No. 49424/67. Headings F2E and F2F. In a spot-type disc brake a pin 5 disposed on the end of a brake cylinder 1 has a spring stop 7 at its free end 6 and has a non-circular crosssection shank 9 between the spring stop 7 and the end wall of the cylinder 1, a stop disc 10 is non-rotatably retained in the brake piston 2 and the stop disc 10 is also non-rotatably slidably mounted on the shank 9 of the pin by a non- circular hole in the stop disc 10 matching the cross-section of the shank 9. The brake piston 2 can move out of the brake cylinder 1 only by a particular amount corresponding substantially to the thickness of the brake pad 4 plus the brake clearance. The stop disc 10 is retained in the piston by a ring 11 and has a hexagonal aperture so as to be non-rotatable on the hexagonal shank 9. The spring stop 7 is formed by a stack of Belleville washers and when the spring stop 7 contacts the stop disc 10 the driver is provided with an indication that the brake pads require renewing.
Patent GB-1255083-A (GB)
Title: Curable mixtures of epoxide resins and substituted ureas
IPC: C08G59/40
Filed: 1969-10-08
Abstract: 1,255,083. Curing epoxy resins. CIBA Ltd. 8 Oct., 1969 [11 Oct., 1968], No. 49541/69. Heading C3B. Epoxy resins are cured using alkyl ureas of formula in which R 1  is a C 1-4  alkyl radical and R 2 , R 3  and R 4  are H or C i - 4  alkyl radicals, e.g. N,N1- dimethyl-, N,N<SP>1</SP> - diethyl-, or N,N,N<SP>1</SP>,N<SP>1</SP>- tetramethyl-urea. From 0.2-0.7 mole of I may be used per epoxide equivalent of the ep¾xy resin. By controlled heating the resin and curing agent may be advanced to the "B- stage". In curing the temperature is preferably raised slowly within the range 120-150‹ C. and finally up to 180‹ C. A typical schedule being 20 hours at 100‹ C:, 2 hours 120‹ C., 3 hours 130‹ C., 1 hour 140‹ C. and 16 hours 160‹ C. Conventional pigments, fillers and extenders may be present.
Patent GB-1392633-A (GB)
Title: Railway switch assembly
IPC: E01B9/48
Filed: 1972-10-27
Abstract: 1392633 Securing railway rails SCHWIHAG GES Fur EISENBANNOBERBAU mbH 27 Oct 1972 [27 Oct 1971] 49570/72 Heading E1G In a railway switch wherein a base plate 3 supports a fixed rail 1 alongside an overhanging bearing member 8 on which the movable switch point (not shown) slides, the rail 1 is secured on one side by a conventional resilient fastening such as 5-6-7 and on the other side by a U-shaped spring clip 17 reacting against the flat or curved roof of a recess 10 in the underside of the member 8 and having its outer ends forced up into notches 14. The clip 17 is inserted by driving it up a wedge 21 and is located by a central rib 25. The member 8 is weldedto the plate 3. Side openings 24 may be provided for the insertion of a support under the legs of the clip. The divergent legs of the U clip 17 may be horizontally cranked as shown, or straight (Fig. 5, not shown), or may, Fig. 4 (not shown) have vertical kinks engaging a flat-roofed recess (10).
Patent GB-1149158-A (GB)
Title: A combined carrier and package assembly
IPC: B65D71/00
Filed: 1967-11-02
Abstract: 1,149,158. Can carrier package. GEO. J. MEYER MFG. CO. 2 Nov., 1967 [14 Nov., 1966], No. 49886/67. Heading B8C. A can &c. carrier package consists of a tubular plastics band heat-shrunk about the cans and having finger openings 16, 18 shaped to facilitate tearing towards the package ends to release the cans. Punched-out portions 20, 22 forming the holes may be used as pull tabs or the holes may be part circular with one straight side adjacent the package ends, the angles between the curved and straight edges forming points of stress concentration facilitating tearing.
Patent GB-1156402-A (GB)
Title: Screw Press for Extruding Plastics Materials
IPC: B29C48/515
Filed: 1966-11-08
Abstract: 1,156,402. Screw extruders. LABORAZIONE MATERIE PLASTICHE S.p.A. 8 Nov., 1966 [13 Nov., 1965], No. 49901/66. Heading B5A. A screw extruder for use with plastics, in particular thermoplastics such as P.V.C. and polypropylene, comprises a screw impeller 10 whose conical downstream end P and at least its terminal thread Sn are cooled by flow of coolant through axial conduit 21, chamber 19 and chamber 18, turn Sn and possibly the two adjacent upstream turns being provided with at least three notches 30 to prevent the formation of a boundary layer between cool and not so cool plastics material. The coolant, which may be a mineral oil, leaves chamber 18 via a series of orifices 23 in a casing 17 and flows upstream through an annular chamber 22. The thread from turn S1 upstream, i.e. upstream of metering section GS is not cooled directly and an insulating sleeve 25 is provided between these turns and chamber 22. The geometrical relationships between turn Sn, notches 30 and conical end P are described, Figs. 2 and 3 (not shown).
Patent GB-1413527-A (GB)
Title: Injection moulding
IPC: B29C45/76
Filed: 1972-11-01
Abstract: 1413527 Injection moulding machine control USM CORP 1 Nov 1972 [1 Nov 1971] 50295/72 Heading B5A [Also in Division G3] An injection moulding machine having an axially reciprocable screw 8 has a control system comprising means to detect the forward velocity of the screw and means to control the forward pressure applied to the screw in response to the detected velocity. When the screw reaches a standard reference velocity (i.e. the velocity to which the screw is reduced on completion of initial filling of the mould) the pressure on the screw is reduced to a holding pressure. When the screw reaches a nominal zero velocity the holding pressure is reduced and a charging operation of the next cycle is initiated. The injection cylinder 4 is provided with heaters 24, and the injection stroke is effected by a piston/ cylinder device 14 which also provides a back pressure during rearward movement of the screw. Means may also be provided for controlling the thermal and mechanical energy input to the machine, the back pressure applied to the screw and the quantities of material plasticized and injected during recharging and injection operations respectively. A process control system (FPC) includes a temperature transducer 30, a pressure transducer 32, and a screw position and velocity transducer 34 comprising a linear potentiometer and a tachometer device. A basic control system (FBC) controls the temperature of the heaters 24, the speed at which the screw is rotated by a motor 12, and the pressure applied to the screw by the device 14. Means are also provided for comparing the detected and sensed operating conditions with pre-set standard reference parameters, the FPC generating output signals in response to this comparison and the FBC controlling the process variables in response to the output signals. Thus, for example, if the temperature of the moulding material is higher than the standard reference temperature the back pressure on the screw is reduced and, if necessary, the speed of rotation of the screw reduced.
Patent GB-1417075-A (GB)
Title: Isocyanates
IPC: C07C263/18
Filed: 1973-10-31
Abstract: 1417075 Treatment of organic isocyanates IMPERIAL CHEMICAL INDUSTRIES Ltd 27 Sept 1974 [31 Oct 1973] 50603/73 Heading C2C Coloured impurities in organic isocyanates and discoloration on storage of said isocyanates are reduced by treating the isocyanates in the liquid state with a molecular sieve. The molecular sieve is preferably in pelleted form. The isocyanates may be aliphatic, aromatic, cycloaliphatic and mixed aromatic/aliphatic mono- and poly-isocyanates.