baber/WOPTO huggingface dataset:
Patent GB-1138416-A (GB)
Title: Improvements in or relating to polyesters
IPC: C08G63/83
Filed: 1967-05-01
Abstract: 1,138,416. Polyesters of tetrabromophthalic acid. DR. BECK & CO. A.G. 1 May, 1967 [21 May, 1966], No. 19915/67. Headings C3P and C3R. In the manufacture of polyesters by reacting tetrabromophthalic acid or its anhydride with a polyhydric alcohol, improved products are obtained by effecting reaction in the presence of an alkali metal phosphate and possibly, also, an alkali metal hydroxide. The phosphate may be added as such or formed in situ from phosphoric acid and an alkali metal hydroxide or an alkali metal salt of a weak acid. Preferred phosphates are Li 3 PO 4 , Na 3 PO4 and K 3 PO 4 . Specified polyhydric alcohols are ethylene glycol, 1:2- or 1:3-propanediol, neopentylene glycol and glycerol. The reaction mixture may also include a monohydric alcohol, a monocarboxylic acid or another bicarboxylic acid or anhydride, e.g. fumaric acid or maleic anhydride. The polyesters containing ethylenic unsaturation may be dissolved in styrene and the mixture hardened with conventional peroxide catalysts and, if desired, accelerators.
Patent GB-483724-A (GB)
Title: Improvements in the manufacture of cellulose derivatives
IPC: C08B11/08
Filed: 1936-07-18
Abstract: Hydroxy-alkyl ethers of cellulose containing at least 2 1/2 hydroxy-alkyl ether groups per molecule of cellulose considered as C6H10O5 are subjected to esterification under such conditions that the product contains at least 2 1/2 esterified hydroxy alkyl ether groups per molecule of cellulose.  Preferably, the cellulose ether contains three hydroxy-alkyl ether groups per molecule of cellulose. The cellulose ethers may be obtained by treatment of cellulose with sodium, potassium, or ammonium hydroxide and then with ethylene oxide, propylene oxide, butylene oxide, epichlorhydrin, or glycide. They may be separated from the reaction medium by washing with alcohol or by dialysis through a cotton bag coated with regenerated cellulose.  Esterification of the hydroxyalkyl ethers may be effected by means of formic acid, or acetic, propionic, or butyric anhydride. Mixed esters may be obtained by using a mixture of esterifying agents.  Catalysts such as sulphuric acid, hydrochloric acid, or zinc chloride may be used. The esters of hydroxy alkyl ethers of cellulose may be dissolved and mixed with pigments, fillers, dyes, lakes, resins, fire retardants, and plasticizers, and used as coating-compositions, lacquers, or dopes, or the solutions may be extruded or cast to form filaments, straws, ribbons, or films.  The esters may be employed in the production of plastics or moulding powders.
Patent GB-1019231-A (GB)
Title: Electrical wire connectors
Inventor: COX RONALD HARRY
IPC: H01R4/50
Filed: 1961-06-02
Abstract: 1,019,231. Binding posts; plug boards; couplings. POSTMASTER-GENERAL. June 7, 1962 [June 2, 1961], No. 20059/61. Heading H2E. A connecting member 1, mounted in an insulating block 3, has serrations 5 against which wires 9 are pressed by a resilient wedge 6. Alternatively, member 1 may be resilient. In another embodiment, Fig. 2 (not shown), the connecting member is W-shaped with two wedges and may be mounted in recesses in an elongated block to form a multi-connection strip, Fig. 3 (not shown). In a further embodiment, Fig. 4 (not shown), connecting member 17 extends through an insulating strip 18 and wires 20 are pressed against serrations 19 by resilient sleeves 21. In a further embodiment, Fig. 5 (not shown) two connecting members 23 are mounted in an insulating block 25 and wires 22 are pressed against the serrations by two resilient wedges 27. In a further embodiment, Fig. 6 (not shown), the connecting member is a flat strip 28 slotted at 28a to provide sharp tongues 30 against which wire 31 is pressed by sleeve 32. Alternatively one tongue 30 may be bent up and the other bent down. In a further embodiment, Figs. 7-9 (not shown) insulating blocks with recesses for serrated connecting members against which wires are pressed by keys are built into a stack. The connectors may be made waterproof by being packed with a waterproofing substance such as silicone grease.
Patent GB-1284772-A (GB)
Title: Gripper axminster looms
Inventor: COATES HERBERT
IPC: D03D39/02
Filed: 1969-04-19
Abstract: 1284772 Gripper axminster looms DAVID CRABTREE & SON Ltd 6 April 1970 [19 April 1969] 20117/69 Addition to 1160876 Heading D1E In an Axminster loom having an undercomb 10 as described in the parent Specification the teeth 16 of the undercomb are of elongate wires or strips and are formed integrally with the teeth 18 of the breast comb. Latch protrusions 26 are provided on the top of the breast comb teeth 18, and in the embodiment wherein they are of wire (Fig. 3, not shown) a separate wire (26) shaped to provide a latch protrusion may be secured to each tooth.
Patent GB-222270-A (GB)
Title: Improvements in the manufacture or treatment of coke and in the manufacture of gas from coke
IPC: C10B57/06
Filed: 1923-08-07
Abstract: 222,270. Imray, O. Y., (Naamlooze Vennootschap Silica en Ovenbouw Mij). Aug. 7, 1923. Materials for making coke and other products. -Coal before charging into a coke oven is mixed with finely divided heavy metal or heavy metal ore, particularly iron, iron oxide, iron carbonate or other iron compound capable of reduction during the combustion of the coke in air, in such proportion that the metallic content of the coke amounts to 1 to 3 per cent by weight.
Patent GB-839810-A (GB)
Title: Improvements in processes for manufacturing semi-conductor materials
IPC: H01L21/00
Filed: 1958-06-24
Abstract: 839,810. Semi-conductors. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. June 24,1958 [July 9, 1957], No. 20228/58. Class 37. A P-type semi-conductor bismuth compound is powdered, moulded under pressure and sintered to convert it to N-type. Bismuth telluride, and bismuth-antimony telluride are preferred materials. The sintering treatment may be applied for 1-2 hours at a temperature of 550‹ C. The material may be used for thermo-electric and Peltier effect cooling purposes (e.g. cooling a transistor), the N-type material being associated with P-type bismuth telluride or P-type sintered zinc antimonide.
Patent GB-490204-A (GB)
Title: Improvements in or relating to photographic shutters
IPC: G03B9/22
Filed: 1937-02-13
Abstract: 490,204. Locking-devices for photographic shutters. KODAK, Ltd. Feb. 13, 1937, No. 20251/38. Convention date, May 12, 1936. Divided out of 490,061. [Class 98 (i)] The delay action mechanism of a photographic shutter is prevented from being set prior to the setting of the actual shutter mechanism by a latch device which is released directly by the shutter master member upon operating the shutter tensioning lever 1 is the release trigger and 2 the tensioning lever for the shutter. The lever 2 causes a pin 3 to move in a slot 4 in the master member 5 and turn the latter about its pivot 6 to tension a spring 7. A latch 9 on the release 1 engages a shoulder 10 on the master member. The latter acts on the shutter blades through a crank 11, hook 13 and ring lug 14. The delay action mechanism comprises a gear train 15 and a spring drum 16 which is tensioned by a ring 19 and setting lever 18. Both normal and delayed exposures may be made by the trigger 1. A latch 20 pivotally mounted at 21 on the shutter plate 22 is spring-urged so that its hook 24 engages a notch 25, and when the shutter is untensioned the ring 19 is prevented from being moved. A downwardly projecting lug 26 lies in the path of a lug 27 on the master member 5. When the shutter is tensioned, the lugs engage and the latch 20 is raised and permits the delay action mechanism to be tensioned.
Patent GB-843501-A (GB)
Title: Polymers and photographic emulsions containing them
IPC: C08F8/30
Filed: 1956-06-29
Abstract: Polymers containing 0,5 to 3,0 mols per cent of one or more units represented by the formulae:  <FORM:0843501/IV(a)/1> <FORM:0843501/IV(a)/2> wherein R1 is H or CH3 and R is an aliphati hydrocarbon chain containing 12 to 18 carbon atoms and 2 represents atoms linking R to the polymer chain, the remaining units of the polymer being -CH2-CH(OH)- may be prepared by reacting polyvinyl alcohol with small amounts of compounds containing a functional group capable of reacting with the hydroxyl groups, or by copolymerizing a vinyl ester, such as vinyl acetate, with small quantities, of copolymerizable vinyl compounds followed by hydrolysis of the ester portions.  Many suitable starting components are listed and preparations describe the reaction of polyvinyl alcohol with (1) palmitoyl chloride, (2) octadecyl isocyanate, (10) tetradecenyl succinic anhydride, and (11) palmitoyl myristoylethenone; polyvinyl acetate with (4) palmitoyl aminoacetal and octadecenyl aldehyde; and the copolymerising of vinyl acetate with (3) vinyl octadecyl ether, (5) allyl N-octadecyl carbamate, (b) allyl octadecyl ether, (7) allyl octadecyl urea, (8) N-allyl palmitamide and (9) N-octadecyl crotonamide, followed by hydrolysis.  Copolymerization may be effected in bulk or in solvents, e.g. methanol, in the presence of catalysts, e.g. benzoyl peroxide and potassium persulphate.  The products may be used in the preparation of photographic emulsions (see Group XX).  Specifications 648,927, 649,544, 649,545 and 655,082 are referred to.ALSO:Alkenyl succinic anhydride derivatives of proteins may be prepared by reacting alkenyl succinic anhydride derivatives, e.g. dodecenyl succinic anhydride, tetradecenyl succinic anhydride, hexadecenyl succinic anhydride and octadecenyl succinic anyhdride, with proteins, e.g. bone glue, oxidised casein and oxidised soybean protein.  The products may be used as peptizing agents in preparing photographic emulsions (see Group XX). Specifications 648,927, 649,544, 649,545 and 655,082 are referred to.
Patent GB-1335444-A (GB)
Title: Photosensitive misfeed detector
IPC: G03G15/00
Filed: 1971-04-19
Abstract: 1335444 Photo-detector circuits XEROX CORP 19 April 1971 [28 Jan 1970] 20405/71 Heading G1A [Also in Division B8] A device for detecting the presence and correct positioning of a sheet being conveyed on a roller surface comprises a fixed plate 11, Fig.2, having angularly directed holes 17, 18 in which are mounted fibre e.g. plastics, optical light guide members 19, 20 through which light is directed towards the roller, and two photo-cells 23, 24 to receive light reflected from the roller. The receiving ends of the guide members project into a housing containing a lamp. A photo-transistor (35) Fig.4 (not shown) in the housing detects any failure of the lamp. The photo-cells 23, 24, Figs.2 and 6, form two arms of a bridge circuit connected to a D.C. power source and including a tap element and a resistor R1. The bridge circuit is connected to the base of a PNP transistor 60 and through a resistor R2 to the emitter of the PNP. A bias resistance R3 is also coupled to the base. The emitter is connected to the base of an identical transistor 61, and the collectors of the transistors are connected. A timing means comprises a capacitor C1 and resistors R4, RT which control the firing of a uni-junction transistor UJT suitably biased by resistances RT, R4, R5, R6, the resistor RT providing thermal compensation for ambient environmental variations. The output of the uni-junction is connected to the collector of a silicon controlled rectifier SCR including a relay 64 in series therewith. The logic control circuit of a printing machine, which is to be controlled according to the detection of the sheet feed, applies to and then removes power from the timing circuit during a specific period during which the condition of the sheet feed is to be detected. In normal operation, i.e. correct sheet feed, unequal reception of light by the photo-cells during the detection period causes the bridge to become unbalanced before the capacitor C1 has become charged sufficiently to trigger the transistor UJT, then both transistors 60, 61 conduct to discharge the capacitor, and a new timing cycle begins at the next detection period. In the case of incorrect feed, the two photo-cells both receive either light or no light and the bridge remains balanced, so that the capacitor C1 continues to be charged until it triggers the uni-junction UJT to fire the rectifier SCR and energize the relay 64, which produces a signal which stops the printing-machine. In the event of a failure of the lamp, the photo-transistor (35) in the housing, which is connected in a circuit block 63, produces a high resistance which prevents the transistors 60, 61 from discharging the capacitor.
Patent GB-1344843-A (GB)
Title: Copolymers of mono-olefins and polyenes and process for preparing the same
IPC: C08F10/00
Filed: 1971-04-19
Abstract: 1344843 Monoolefin - dialkylidene norbornene terpolymers SNAM PROGETTI SpA 19 April 1971 [22 Jan 1970] 20416/71 Heading C3P A copolymer is obtainable from at least two monoolefins and a conjugated dialkylidene norbornene of the formula where R<SP>1-8</SP> are each hydrogen, alkyl or aryl. The copolymer may be prepared by means of the usual Zeigler catalysts and polymerization techniques, including the use of polyiminoalanes as the reducing aluminium compound. In the examples, ethylene-propylene-2,3-diisopropylidene- or 2 - ethylidene - 3 - isopropylidenenorborn-5-enes are copolymerized in the presence of VOCl 3  and (C 2 H 5 ) 3 Al 2 Cl 3 .
Patent GB-1144958-A (GB)
Title: Textile fibres
IPC: D01F6/66
Filed: 1967-05-03
Abstract: 1,144,958. Oxymethylene polymer-epichlorhydrin condensation polymer filaments. MONTECATINI EDISON S.p.A. 3 May, 1967 [4 May, 1966], No. 20421/67. Heading B5B. [Also in Division C3] Textile fibres are obtained by bringing the components of the following polymer composition into intimate contact and extrusion thereafter, the composition comprising (1) an oxymethylene polymer and (2) 1 to 25% of a condensation polymer of epichlorohydrin with one or more mono- or diamines or imines. The extrusion process may be carried out under pure nitrogen, and the yarn thus formed stretched and dimensionally stabilized. The fibres may be rendered water-insoluble by treatment with a mono- or di-epoxide, e.g. ethylene glycol diglycidyl ether, a mono- or diisocyanate, a mono- or dialdehyde, a halogen, or divinyl benzene, and may be dyed.
Patent GB-671888-A (GB)
Title: Improvements in or relating to the cutting up of wood billets into pieces
IPC: B27B5/22
Filed: 1950-08-18
Abstract: 671,888. Sawling. SESTAK, J. Aug. 18, 1950, No. 20499/60. Class 145 (ii). A saw for cutting up wood billets 12 has a series of circular saws 13 arranged offset i.e. parallel to each other and with axes staggered; and a conveyer 10 which carries the billets past the saws. Each billet is engaged by a spring device 11 (see Fig. 3), which devices are secured at intervals to the conveyer 10. The chain link 20 and pivoted jaw 21 have teeth to grip the billet, a spring 22 pressing the jaw onto the billet. The conveyer is arranged as an inclined plane, at the top of which stops (not shown), press up the spring 22 thus releasing the cut billet..
Patent GB-1218659-A (GB)
Title: Method of testing the positions of a series of piston rings
Inventor: FUHRMANN ERNST
IPC: F16J9/12
Filed: 1968-04-30
Abstract: 1,218,659. Identifying a surface by radiation. GOETZEWERKE FRIEDRICH GOETZE A.G. April 30, 1968 [May 20, 1967], No. 20503/68. Heading G1A. The upper surface of a piston ring is marked with paint, magnetic particles, or radio-active material and is detected by a sensing device moving relative to it. The position of the upper surface of a ring in a packet may be checked by a Geiger counter. Radio-active sources are exemplified.
Patent GB-836599-A (GB)
Title: Flexible conduit and method of making same
IPC: F16L11/118
Filed: 1956-07-03
Abstract: 836,599. Flexible conduits. DAYTON RUBBER CO. July 3, 1956 [July 5, 1955], No. 20526/56. Class 99(2). A flexible conduit comprises a helically corrugated tubular body 11 formed with helical crests and troughs around the outer periphery thereof, a helical reinforcing member 12 positioned within the body and within the crests, and a multiple conductor, insulated, electric cable 17 removably embracing the outer surface of the body and positioned within the troughs whereby to protect the cable against abrasion while permitting accessibility to the cable for inspection, repair, removal and replacement. There are separate means near each end of the body for anchoring the cable thereto at the points where the cable enters and leaves the troughs. The body 11 may be of rubber or synthetic material such as butadiene-styrene copolymers, butadiene acrylonitrile copolymers, polysulphide rubbers, polychloroprene, elastomeric polyvinyl, or polyethylene. As shown the helical, wire reinforcing coil 12 is covered by rubberised tape or fabric 13 applied to follow the turns of the coil or as a sheet wrapped about the body and coil ; there is an outer tubularly woven, stockinet cover 14 of cotton, rayon or nylon. The cable 17 is looped about the ends of the conduit and tied in a knot, or anchored by a string or cord 20. Sleeves 21 of elastic material fitted at the ends of the conduit have clamped thereon receptacles 23 for the cable. In making the hose, the tube 11 is placed upon a mandrel and the coil 12 is positioned thereover and stretched axially, after which the tape 13 is applied ; the assembly may be subjected to preliminary vulcanization. The partially made conduit is positioned on a second mandrel and a tensioned, inextensible cord wound round the conduit and between the turns of the coil to form the helical corrugation. Finally, the conduit is cured and the cable is wound firmly into the trough of the corrugation.
Patent GB-315761-A (GB)
IPC: B23B29/034
Filed: 1929-07-04
Abstract: 315,761. Thomsen, W., and Jacobsen, H. July 17,1928, [Convention date]. Boring-heads.-A boring-head 4 particularly adapted for reboring the cylinders of automobile and d other engines is screwed onto a threaded portion 2 of the spindle 1 and is provided with guides for cutters 5 which are notched on their upper surfaces to engage a scroll on an adjusting member 8 and are retained by a cover-plate 19. The member 8 has a cone-ended sleeve portion 12 which may be clamped against a conical recess in a member 10 by means of a clamping-ring 11, balls 18 being mounted between the clamping-ring and a shoulder on the sleeve 12. The member 10 carries a pin 13 having limited movement in a slot 14 provided in a member 15 secured to the head. The cutters are set, by means of a scale 17, with the pin 13 in the position which gives full expansion of the head. After clamping the head, the cutters are retracted to a limited extent by rotation of the members 10, 8, the head is inserted in the cylinder to be rebored and the cutters expanded to contact with the cylinder which is then clamped. The head is then withdrawn and the cutters re-set to the adjusted fullexpansion position for the reboring operation.
Patent GB-784713-A (GB)
Title: Improvements in fire-alarms for combustible material
IPC: G08B17/04
Filed: 1954-07-14
Abstract: 784,713. Automatic fire alarms. BRITISH CECA CO., Ltd., and FOXCROFT, J. R. July 12, 1955 [July 14, 1954], No. 20561/54. Class 118 (1). An automatic fire alarm comprises fusible or thermally plastic lead, alloy or plastic detector tubes a and b laid in beds of combustible material q to be protected, which tubes are connected in parallel via a pipe c to a supply g of pressure fluid such as nitrogen or compressed air, and are also connected via a second pipe h to a pressure-sensitive bellows j which prevents a counterweighted switch k from completing an alarm circuit m when the tubes are intact and pressurized, but which allows the switch k to operate the alarm when the tubes melt or soften and cause pressure leakage. Valves r may be operated successively after alarm to determine which bed q is on fire, the pressure building up again and being indicated by gauges d and i when the faulty tube has been isolated. Valves s may be operated when each tube is arranged to control two beds or layers, and a valve t may be opened to test the installation.
Patent GB-1338673-A (GB)
Title: Controlling the feedrate of a machine tool
IPC: G01N3/58
Filed: 1971-04-19
Abstract: 1338673 Machine tool details; milling BOEING CO 19 April 1971 [27 Feb 1970] 20618/71 Headings B3B and B3K [Also in Divisions G1 and G3] Apparatus for automatically controlling the feed rate of a machine tool, e.g. a milling machine, comprises a sensor supporting member 70 having an opening therethrough and magnetic sensor means M1-M4 supported by said member 70 and employing the variation in an air gap between a tool spindle 72 extending through said opening and said sensor means for measuring a given parameter at a cutting tool and producing therefrom a signal proportional to a cutting force exerted on the cutting tool that causes the said variation; means providing a reference force signal; means summing said reference force signal with said cutting force signal to provide an error signal representative of the sum of said signals; and controller means producing from said error signal a control signal and including means for coupling said control signal to a feed-rate control input of the tool. An integral control function (Fig. 4, not shown, is provided which operates to control the average cutter force equal to the reference force, and peak cutter force to about twice the reference force for all selected feed-rates. The gain constant of an amplifier and integrator (196) is chosen to determine the acceleration and decelleration of feedrate increases and decreases. To prevent a tool from approaching a workpiece at a fast speed and then colliding therewith a second input defining a max-feed-rate is supplied to amplifier (196). In the alternative arrangement the primary windings of the transformer sensor means (M1)- (M6) (Fig. 6, not shown) are in series-aiding relationship and the secondary windings are in series-opposed relationship. The outputs are fed to demodulator circuits (292) which produces a D.C. output signal with noise and spurious signals filtered out, e.g. a band-pass filter (294) screens out effects of eccentricity of the spindle and bearing run-out on the gap between the transformer windings. The Fig. 6 circuit accentuates small deflections by increasing the sensitivity thereof by a square root feedback loop (304) on a summing amplifier (302). A further control refinement comprises a circuit, Fig. 9 (not shown), which ensures that, from a pre-programmed feed-rate when a cutting tool is barely in engagement with a workpiece (V ref.) exceeds (V det.) and the circuit operates to reduce the feed-rate by one half. As the cutting tool engages further with the workpiece (V det.) is increased and exceeds (V ret.) the amplifier (316) provides an increased control signal to further reduce the feed-rate in proportion to the milling force signal from the sensor means.
Patent GB-794396-A (GB)
Title: Process for the production of spinning solutions from polyacrylonitrile and acrylonitrile copolymers
IPC: C08J3/09
Filed: 1956-07-04
Abstract: Solutions of acrylonitrile polymers and copolymers, e.g. with methyl methacrylate, from which threads may be dry or wet spun, are made using a solvent mixture of glycollic acid nitrile (60 to 95 per cent) and ethylene chlorhydrin.  Reducing agents such as sulphur dioxide or formaldehyde may be present to improve colour stability.  In Example (2) the polyacrylonitrile solution is spun into a bath of xylene (80 per cent) and butanol, stretched and fixed by heating.