baber/WOPTO huggingface dataset:
Patent GB-358126-A (GB)
Title: Improvements in hydraulic brakes
IPC: F16D65/74
Filed: 1931-04-09
Abstract: 358,126. Fluid - pressure brakes. HALL, F. H., Cleeve Cottage, Holford, near Bridgwater, Somerset. April 9, 1931, No. 17771/30. [Class 103 (i).] Hydraulic or fluid-pressure brakes, particularly for motor vehicles provided with means comprising a valve 6 carried by a piston 5 in a cylinder 1 for adjusting the brakes which will allow the necessary quantity of fluid to apply the brakes to pass from the pedal-operated master cylinder to the wheel cylinders but controls the return of fluid to the master cylinder is constructed to allow of the grinding in of the valve. The stem of the valve 6 is provided with a slot 7a and a removable screw plug 27 is provided to allow of the insertion of a screwdriver whereby the valve can be ground upon its seating. The piston 8 is adjustably fixed on the valve 6 in order to regulate the quantity of fluid returned to the master cylinder. Fluid is adapted to be forced by the master cylinder through a union 4 which fluid forces the valve 6 off its seating and entering the cylinder 1 raises the piston 8. The piston forces fluid on the upper side of the piston through unions 13 to the front and rear wheel brake cylinders in order to apply the brakes until the piston abuts against a screw plug 27 at the top of the cylinder 1 when the lowest groove of three grooves 23 formed by vertical grooves 26 is uncovered by the piston 1 and the master cylinder is placed in direct communication with the wheel cylinders. Fluid flows from the master cylinder to the wheel cylinders if through wear the brake shoes are not fully applied. When the pressure on the brake pedal of the master cylinder is relieved the piston. 8 descends and closes the groove 23 interrupting the direct connection between the master and the wheel cylinders and the valve 6 is closed, preventing leakage of fluid past the piston. An air-release plug 30 is provided in the plug 27. In a modification a separate cylinder 1 is screwed directly to each wheel brake cylinder, the piston is fixed on the valve stem and the valve seat is adjustable.
Patent GB-744014-A (GB)
Title: Electromagnetically switched continuous multiplying circuit
IPC: G06G7/16
Filed: 1953-06-26
Abstract: 744,014. Electric analogue calculating systems. SAUNDERS-ROE, Ltd., ISLE, D.E.S., and BLACKWELL, H. R. July 22,1954 [June 26, 1953], No. 17797/53. Class 37. Apparatus for producing an output analogue signal representing the product of the instantaneous values of two functions represented by corresponding input analogue signals comprises an electromagnetic relay having a contact oscillated between fixed contacts by a coil energized by a steady A.C., in which the first input signal'is applied to the or a second relay excitation coil and the second input signal is applied to one of the fixed contacts; the resultant composite pulsed waveform on the moving relay contact being applied to a demodulator, which converts it into an output signal analogous to the product of the input functions. In Fig. 1 a source of A.C. at a multiple of the maximum frequency in either input is connected over isolating condensers to energize coil 10 of the relay which is also energized by the analogue voltage of input function x while the analogue voltage of input function y is applied in balanced push-pull to relay fixed contacts 12, 13, and the moving contact 11 develops a rectangular waveform whose amplitude is proportional to the instantaneous value of y and whose average value is proportional to where M, S are the mark and space times. The waveform is applied to the input of a demodulator 14 comprising (Fig. 5) in oppositely poled parallel connection two pairs of series connected germanium rectifiers D1, D3 and D2, D4 separated by capacitors C3, C4, the output appearing at the junction of resistances R3, R4 respectively connected to the junctions of C3, D1 and C4, D2. The opposed rectifier circuits alternately conduct on positive and negative pulses to charge capacitors C3, C4 which similarly discharge opposed currents M/M+S and S/M+S on alternate pulses into the output circuit, so that the average current is proportional to M#S/M+S and in turn proportional to input function x (Figs. 3, 4, not shown) so that the analogue voltage developed at the output is proportional to xy. The latter is serially added to a voltage representing k (which may be variable) injected at E F so that the total output voltage at I J is the analogue of a=xy+k which equation is thus solved. The input x analogue voltage may be applied to a second coil exciting the relay, eliminating the isolating capacitances. In a modification (Fig. 3, not shown) the y input analogue voltage may be positively applied between one fixed contact and earth with a standing negative bias applied to the moving contact. Alternatively to the negative moving contact bias, the relay itself may be biased to normally produce a small mark to space ratio of the output waveform, which is increased proportionately to the Y input analogue voltage and comprises only positivegoing pulses (Fig. 6, not shown). The demodulator may then comprise only a single rectifier branch.
Patent GB-255480-A (GB)
Title: Improvements in or relating to the regulation of asynchronous electric machines
IPC: H02K17/40
Filed: 1926-07-16
Abstract: 255,480. Siemens - Schuckertwerke Ges. July 17, 1925, [Convention date]. Alternating-current induction machines; commutating windings. - Fluctuations in the commutating field of a rotary converter connected in the secondary circuit of an asynchronous machine are balanced in dependence upon fluctuations in the ratio of the alternating-current to the continuous - current in the converter. As shown in the connection with the Kramer system, the converter 6 is provided with the usual commutating interpole winding 9 and an additional interpole winding 10 excited from an auxiliary machine 11 coupled to the converter. The rotor of the auxiliary machine is excited from the alternating- current side of the converter through the series transformer 12, and the field winding 13 is excited from the continuous current side by means of a diverter 14. Normally the two excitations balance each other, but when changes take place in the ratio of the converter currents, the auxiliary machine is excited and suppiies currents to the coil 10 to strengthen or weaken the converter commutating field.
Patent GB-1477665-A (GB)
Title: Catheter
IPC: B29C45/14
Filed: 1974-04-24
Abstract: 1477665 Catheters INTERNATIONAL PAPER CO 24 April. 1974 [8 May 1973] 17903/74 Heading A5R [Also in Division B5] A urinary retention catheter comprises an extruded silicone rubber shaft 12 having a drainage lumen 13, and an inflation lumen 14 communicating with the shaft exterior through an aperture (15) Fig. 3, (not shown), near the distal end of said shaft, a tip 90 moulded to said distal end and having a hollow portion 94 therein communicating with said drainage lumen, drainage eyes 91, 92 through said tip, and a balloon sleeve 50 having one end thereof moulded to shaft on the proximal side of said aperture and the other end thereof bonded to and received in a groove (93) in said tip. The modulus of elasticity of said balloon sleeve is less than that of the tip and preferably the sleeve and tip are also of silicone rubber, the cross-sectional width of the sleeve at its bonded end being less than that of the tip. In alternative embodiments, said other end of the sleeve may be bonded to the shaft on the distal side of said aperture, or the sleeve may be moulded to the shaft on the distal side of said aperture and bonded thereto on the proximal side thereof, a groove (93') Fig. 8, (not shown), being provided in the shaft instead of in the tip in these embodiments. The shaft, sleeve, and tip are initially only partially cured, being completely cured after said sleeve has been bonded to the catheter. The balloon sleeve is insert-moulded to the shaft i.e. the shaft is inserted into a mould and the sleeve is formed within the mould and simultaneously moulded to the shaft. The tip also is insert-moulded to the shaft.
Patent GB-1463137-A (GB)
Title: Rock cutting tip inserts application
IPC: E21C35/183
Filed: 1974-04-24
Abstract: 1463137 Rock drill bits COAL INDUSTRY (PATENTS) Ltd 10 April 1975 [24 April 1974 31 May 1974] 17909/74 and 24284/74 Heading B3C [Also in Division E1] A rock cutting tip insert comprises a cutting margin 5 of one hardness level and a backing portion 6 of a second hardness level, the first hardness level being at least 100, preferably at least 400, units on the Vickers Hardness scale greater than the second hardness level. The cutting margin may be formed of the same material, e.g. cemented carbide, as the backing portion, but subjected to a hardening process. The cutting margin and/or the backing portion may be formed of a hard mineral or ceramic, or of a composite material in which hard mineral or ceramic particles are embedded in a softer matrix.
Patent GB-800267-A (GB)
Title: Method of and apparatus for producing liquefied gas from gas stored under pressure
Inventor: EASTLAND DENNIS HARRY
IPC: F25J1/00
Filed: 1956-06-11
Abstract: 800,267. Liquefaction of gases. BRITISH OXYGEN CO., Ltd. June 7, 1957 [June 11, 1956], No. 17967/56. Class 8(2). Liquefaction of gas stored at high pressure in a plurality of containers 1, 2 is effected by discharging each container in turn through a line 7 and a heat exchanger 8 traversed by an unliquefied portion of the gas after expansion at a valve 9 and separation of the liquefied portion in a receiver 10; the residual cold in said unliquefied portion leaving the heat exchanger 8 through a duct 11 being utilised in a coil 12 within one or more of the remaining charged containers to effect cooling thereof. The low pressure gas leaving the coil or coils 12 is recompressed and fed to an empty container. Each container is insulated and is constructed of low heat capacity light weight material e.g. glass fibre.
Patent GB-1223796-A (GB)
Title: Method of improving the flavour and/or aroma of fats and oils
Inventor: ENEI HITOSHI
IPC: A23L27/21
Filed: 1969-04-08
Abstract: 1,223,796. Flavouring fats. AJINOMOTO CO. Inc. 8 April, 1969 [9 April, 1968], No. 17999/69 Heading C5C. The flavour and aroma of fats and oils are improved by heating a mixture of the fat with proline and/or lysine and a sugar at more than 60‹ C., and optionally filtering off any precipitate formed. The proline and/or lysine may be used in amount 0À01-5% by wt. of the mixtureand the sugar may be present in amount 0À01-100 parts by weight of the proline and/or lysine. The sugar may be xylose, ribose, glucose, dihydroxyacetone or a mixture thereof. The mixture may also include other amino acids such as cystine, glutamic acid, histidine, and arginine, and compounds containing an aldehyde or keto group, e.g. glyceraldehyde, sorbitol, pyruvic acid or α-ketoglutaric acid. The fat may be lard, tallow, or fish, chrysalis, linseed, corn, sesame, and peanut oils. The examples relate to lard.
Patent GB-862997-A (GB)
Title: Paper clamping device for drawing boards and drawing boards provided with such devices
IPC: B43L5/02
Filed: 1959-05-27
Abstract: 862,997. Clamps. DIXON, E. P. May 27, 1959, No. 18084/59. Class 44. A device for securing paper and like sheet material to a drawing board 11 comprises a block 1 and an external shell 7 constrained to slide relative thereto under spring loading 6 with such shell having a flange 8 which will bear against one surface of the block to clamp a sheet of paper or similar material having its edge placed between those parts. As shown, the block 1 is formed with a stepped portion 2 which engages a box-like portion of the shell 7 and a plurality of the devices are screwed to recesses 10 at the edges of the board so that either the upper surface of the block or the flange lies flush with the board.
Patent GB-191683-A (GB)
Title: Improvements in gill boxes or frames
IPC: D01H5/04
Filed: 1922-07-01
Abstract: 191,683. Webster, J. P. July 1, 1922. Gill boxes &c.-The faller bars as they are lowered on to the bottom screws are received by rotary cam-pieces with projections 1 mounted on brackets 3.
Patent GB-480573-A (GB)
Title: Manufacture of vat dyestuffs
IPC: C09B3/00
Filed: 1937-06-30
Abstract: Vat dyes containing sulphur are made by heating pyrene or a substitution product thereof with aqueous sulphuric acid. Substitution products specified are oxypyrenes, aminopyrenes, oxypyrene-sulphonic acids, and aminopyrene sulphonic acids.  A temperature range of 130 to 250 DEG  C. and a sulphuric acid concentration of 40-90 per cent are advantageous.  The products may be halogenated or nitrated or converted to their leuco-derivatives, and those products containing halogen may be condensed with aromatic amines, such as aminoanthraquinones.  In examples, (1) 3-hydroxypyrene is sulphonated and the product heated with dilute sulphuric acid at 190-200 DEG  C. (violet-black tints on cotton); (2) 3-hydroxypyrenedisulphonic acid is heated with 65 per cent sulphuric acid at 190-200 DEG  C., 93 per cent sulphuric acid at 135-140 DEG C., or 55 per cent sulphuric acid at 185-190 DEG  C., and (3) potassium 3 - hydroxypyrene monosulphonate; (4) 3 - hydroxypyrene; (5) pyrene, and (6) 3-aminopyrene or 3-aminopyrenemonosulphonic acid are heated with 75 per cent sulphuric acid to 190-200 DEG  C., giving products dyeing cotton violet-black, black-olive or black-brown tints.  Also in examples, the dyestuff obtained in (1) is chlorinated with sulphuryl chloride, brominated or nitrated, and the brominated product condensed with a -aminoanthraquinone or aniline, giving products dyeing cotton violet-black, brown-black, grey, or brown-violet tints.  Two examples describe the dyeing of cotton in a hydrosulphite vat with the product of (1) and that obtained from a -aminoanthraquinone.  Specification 469,927 is referred to.
Patent GB-1199852-A (GB)
Title: Improvements in or relating to the Preparation of Highly Polymeric Polyesters
IPC: C08G63/85
Filed: 1968-04-17
Abstract: 1,199,852. Arsenic acid salts polycondensation catalysts. FMC CORP. 17 April, 1968 [26 June, 1967], No. 18205/68. Heading C3R. A highly polymeric linear polyester is prepared by polycondensing a polyester prepolymer in the presence of an orthoarsenite or orthoarsenate of a Group II B , IV A , V A  and VIII metal, in particular Sn, Sb, Co, Pb, Zn orthoarsenates and Sb orthoarsenite. The polyester prepolymer is prepared by direct esterification or transesterification in the presence of a catalyst (e.g. Ca(CH 3 CO 2 ) 2  or LiH and Zn(CH 3 CO 2 ) 2  respectively). Specified polyester in polyethylene terephthalate from dimethyl terephthalate and ethylene glycol.
Patent GB-497950-A (GB)
Title: Improvements in or relating to variable electric condensers
Filed: 1937-06-30
Abstract: 497,950. Variable condensers ; casting composite articles. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 30, 1937, No. 18210. Convention date, June 30, 1936. [Class 37] [Also in Group XXII] A tube 10 forms one electrode the other being a metal rod 40 of less diameter, slidable in a conductive housing 20 insulated from the tube as by an insulating tube 30, the tube 10 and the housing 20 being secured in the insulator 30 as by casting-on end caps 11, 21. After adjustment, the rod 40 may be held in place by a screw cap 27. The casting operation is effected by first mounting the parts on a mandrel having portions 51, 52 of diameters corresponding to the bores of the parts 10, 20. A loop of conductor wire w is formed round the tube 10 between the rib 12 and the insulating sleeve 30. The assembly is inserted in a mould 60 with the lead-wire passing through a hole 61, and molten metal is poured through the apertures 64, 65. Grooves 31, 31a in the sleeve 30 prevent possibility of relative rotation after casting the caps 11, 21.
Patent GB-1445054-A (GB)
Title: Presses for the manufacture of shaped articles from plastics sheet structures
IPC: B29C51/08
Filed: 1974-04-25
Abstract: 1445054 Sheet forming SALADIN AG 25 April 1974 [25 April 1973] 18237/74 Heading B5A A press for making a shaped article from a plastics sheet 17, e.g. a floor covering for a motor vehicle, comprises a grid-like member 11 mounted on a pivoted arm 2 adapted to be moved in a mould part 15 by a ram 4, and the member 11 has at least one inwardly bulged portion 18 which corresponds with a yieldable wall portion 19 in the part 15. In Fig. 2, the portion 19 is formed by a cap mounted so as to be loaded inwardly by springs 30, 31. The wall portion can be formed by plastically deformable material, e.g. lead sheet, or elastic material, e.g. rubber. A cutter 33 is associated with a recess 34. A jacket 35 can be used to remove by suction pieces stamped from the sheet by cutter 33, or gases developed during the moulding process. Heating, cooling or chemical treatment medium can be passed through the tubes of the grid-like member.
Patent GB-712955-A (GB)
Title: A circuit arrangement for the neutralisation of detrimental inter-electrode capacities
IPC: H03F1/16
Filed: 1952-07-21
Abstract: 712,955. Tube amplifying circuits. TESLA, NARODNI PODNIK. July 21, 1952 [July 21, 1951], No. 18347/52. Class 40 (6) In an H.F. amplifier having a neutralizing capacitor 4 between the anode and the opposite end 6 of the winding 11 driving the grid 5, a further capacitor 9 is inserted between earth and a tap on the winding where the H.F. potential is a minimum. A grounded grid valve may be used, Fig. 3 (not shown). The capacitor 9 may have a value of 3 or 4 times the sum of the capacitors 7, 8 or alternatively a value between 1.5 and 2 times.
Patent GB-571572-A (GB)
Title: Improvements in or relating to the production of cellulose derivatives
IPC: C08B13/00
Filed: 1943-11-05
Abstract: A cellulose alkyl ether containing at least two alkyl radicals per glucose unit of the cellulose molecule is esterified with an anhydride of an organic mono-carboxylic acid containing at least six carbon atoms in the molecule in presence of a metal halide as catalyst.  The metal halide catalyst may be ferric, stannic, or zinc chloride, and it may be used in conjunction with a small amount of a hydrohalide acid such as hydrochloric acid.  The esterification may be carried out in solution, e.g. in solution in a halogenated hydrocarbon such as ethylene dichloride or in pyridine.  The cellulose ether may be an ethyl, propyl, butyl, or hexyl cellulose. The carboxylic anhydride may be lauric, palmitic, stearic, caproic, heptylic, or benzoic anhydride. Cellulose ether-esters are obtained which are soluble in many organic liquids, e.g. an ethyl cellulose stearate is obtained which is soluble in methyl ethyl ketone, acetone, methyl and ethyl acetates, benzene, toluene, xylene, chloroform, methylene and ethylene dichlorides, butyl alcohol and diethyl ether.  Products substantially free from hydroxy groups may be obtained.  The products may be used in the form of solutions or plastic compositions for insulating electric conductors, for waterproofing fabrics or wrapping foils, or for making filaments, foils, or other articles.  In an example, ethyl cellulose is dissolved in ethylene dichloride and then stearic anhydride and zinc chloride with hydrochloric acid are added.  When esterification has occurred, the solution is poured into boiling water to precipitate the cellulose ether-ester and to volatilize the ethylene dichloride. The product is washed with dilute sodium carbonate solution. Specification 342,740 is referred to.
Patent GB-1033193-A (GB)
Title: Improvements in or relating to sliding clasp fasteners
Inventor: BRADFIELD MICHAEL SEYMOUR
IPC: A44B19/38
Filed: 1963-05-09
Abstract: 1,033,193. Sliding clasp fasteners. LIGHTNING FASTENERS Ltd. July 27, 1964 [May 9, 1963], No. 18408/63. Heading E2S. An open end fitting for a sliding clasp fastener includes a socket member 7 for locating the stringers in a coupling position, the socket member being movable relative to the stringers when in the coupling position to embrace and to support against dislocation at least the pair of coupled elements next to the open end fitting. As shown the fitting also includes a guide member 6 secured to the end portion of one of the stringers 2, the socket member 7 being slidable on the guide member 6. The guide member 6 consists of a rail 9 moulded so as to straddle the bottom end of the carrier tape of the stringer to which it is attached and ribs 10, 10a moulded on each side of the carrier tape; the rib 10 is L-shaped and forms with the rail 9 a channel 11 closed at the lower end whereas the rib 10a is of constant cross-section and forms with the rail 9 a channel 11a open at both ends. The rib 10 has taper 13 at the mouth of the channel 11 and the rail 9 is provided with two recesses 12. The socket member 7 is a box-like component having one end open and two sides having slots 18, 19 extending from the open end to the closed end for the passage of the carrier tapes; the slot 18 is formed by two lips 14, 17 and the slot is enlarged towards the closed end by making lip 17 shorter than lip 14. The socket member 7 is assembled to the guide member 6 by springing the lip 17 over the base of rib 10 so that the lip 17 engages the channel 11, its removal being prevented by the inner end of lip 17 abutting the base of rib 10; the thickness of lip 17 and the width of the channel 11 are arranged to provide rubbing frictional grip. A pin member is mounted on the bottom of the other carrier tape and this is received in the socket member 7. In use after the coupling elements of the stringers have been engaged by the slider the socket member is moved by finger pressure to embrace the lowermost coupling elements; when the slider is moved to disengage the coupling elements it engages the socket member and moves it away from the lowermost coupling elements to enable them to be disengaged. In the disengaged position the recesses 12 receive ribs on the slider. In a modification the socket member can be spring urged towards the stringers so that it slides to the engaged position as soon as the slider is moved away from the open end fitting.
Patent GB-236399-A (GB)
Title: An improved satchel for cartridges
IPC: F42B39/02
Filed: 1924-08-01
Abstract: 236,399. Hellis, C. J., and Hellis & Sons, C. Aug. 1, 1924. Shooting bags and cases: bags. - A cartridge satchel is made with a substantially semi-cylindrical body and a separate cover flap m hinged so that it can be folded back flush with the back of the satchel. The body of the satchel may comprise three separate pieces secured together, namely, a front piece b, Fig. 1, a back piece c, and a curved piece d forming the bottom and. the sides. The top part g with an aperture i is formed by an extension of the front or back; or the front, the top, and the back may be in one piece. The side piece d may be reinforced and is provided with buckles f for the attachment of a shoulder strap a. The cover m is hinged by means of a rod k, Fig. 3, passing through tubular portion l of the cover and fitting at the ends in sockets j in the body of the satchel.
Patent GB-759715-A (GB)
Title: Improvements in or relating to falsework supports
IPC: E04G11/36
Filed: 1952-12-29
Abstract: 759,715. Girders for supporting ceiling shuttering. HINZE, O. Dec. 29, 1952 [Dec. 27, 1951], No. 18424/54. Divided out of 759,703. Addition to 759,691. Class 20(2). The falsework girder of the parent Specification is provided between two of its elements A, Fig. 4, with a connecting piece B, the upper chord 15, Fig. 1, of which comprises two portions at an obtuse angle to each other. The ends of the chord 15 butt against the ends of the upper chords of the falsework elements A and the lower chord is connected by adjustable turnbuckles 13 to the lower chords of the elements. The falsework is shown used to cast an arch, Fig. 3 (not shown) and a dome, Figs. 3, 5 and 6 (not shown).. In Fig. 4 the falsework is used to support shuttering 3, 4 for casting the wall of a silo in this case the connecting pieces B for the inner falsework have upper chords which are longer than the lower chords, whereas the upper chord of the connecting pieces F for the outer falsework have short chords and the members 19, 20 connecting the upper and lower chords are approximately parallel.