baber/WOPTO huggingface dataset:
Patent GB-639871-A (GB)
Title: Improvements in aircraft propellers
IPC: B64C11/06
Filed: 1947-09-25
Abstract: 639,871. Variable-pitch propellers. EVEREL PROPELLER CORPORATION. Sept. 25, 1947, No. 26029. Convention date, Sept. 17, 1946. [Class 114] [Also in Group XXVI] A variable-pitch propeller hub comprises a casing 2 having sleeves 7 to receive the shanks of the blades, mounted in thrust bearings 191 therein. The bearings 19<SP>1</SP> are pre-loaded by means of telescopic sleeves 34, 36 having shoulders thereon engaging bearings 32a, 32b mounted within the sleeves 7. The sleeves 34, 36 are screw-threaded and are adjusted by means of tools fitting into slots in the end face of the sleeve 34 and splines 39 in the sleeve 36. A bolt 40 engaging the slots and the splines 39 locks the sleeves 34, 36 in the required position. Pitch changing movement of the sleeves 7 is synchronized by means of links 48 secured at one end to a pin 47 on the sleeve 7 and at the other end to a gudgeon pin of a guide piston operating,in a radial cylinder 51, the cylinder head 52 of which forms a limit stop. A limit stop in the opposite direction is provided by a flange 57 on a central guide 56 in the hub 2, in which the sleeve 34 is freely guided. Balance weights 62 may be placed at either end of the hub 2 and others on the sleeves 7 (see also Fig. 3, not shown). Reference has been directed by the Comptroller to Specification 629,606.
Patent GB-645991-A (GB)
Title: Improvements in or relating to electrical plug fittings
Filed: 1948-10-06
Abstract: 645,991. Two-part couplings. URLWIN, H. C. Oct. 6, 1948, No. 26040. Convention date, Oct. 21, 1947. [Class 38 (i)] [Also in Group XXXVII] In a socket 1 the contacts each comprising a binding post 5 and a co-operating spring 8 between which e plug pin can be received, are held loosely in recesses 9 in the socket body by the body cover, the recesses being defined by upstanding walls 10 of which one is apertured at 11 for the clamping screw 7. The recesses and the contacts may be shaped to prevent axial turning of the contacts.
Patent GB-156937-A (GB)
Title: Improvements in or relating to oilers and the like
IPC: F16N3/06
Filed: 1919-10-24
Abstract: 156,937. Garside, J. Oct. 24, 1919. Lubricating-cans.-An upright oil-can has a valveless air-inlet separated from the filling-opening in the form of a coil DD or other tube having a deviating direction so as to cause air and oil locks or traps to prevent the accidental leakage of oil, while allowing discharge when the oil-can is in the proper position. The airinlet D is disposed in an extension piece C secured to the body of the can and to which a spout E is secured. The can may have brazed or welded joints.
Patent GB-1137756-A (GB)
Title: Improvements in radiation detector
IPC: G01J1/42
Filed: 1966-06-13
Abstract: 1,137,756. Luminescent materials and uses thereof. BULL & ROBERTS Inc. 13 June, 1966 [2 July, 1965], No. 26182/66. Heading C4S. [Also in Divisions G1 and H1] A radiation detector 10 comprises a colour filter 14, a phosphor 13 converting filtered light having a wavelength of 2400 to 2900 A into visible light, a glass window 12 and a photoconductive CdS base 11. The phosphor consists of Ca 2 (PO 4 ) 3  with traces of Sb, Mn, Cl and F dispersed in a lacquer base. The element 11 is a CdS diode. To indicate the intensity of U.V. radiation the detector is incorporated in a circuit in series with a relay which operates a lamp when the intensity falls below a desired level.
Patent GB-698772-A (GB)
Title: Improvements in or relating to methods of manufacturing optical, aspherical correction elements
IPC: B29D11/00
Filed: 1951-11-09
Abstract: 698,772. Optical systems. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Nov. 9, 1951 [Nov. 13, 1950], No. 26277/51. Class 97 (i). [Also in Group V] An aspherical correcting element, for example for a Schmidt system, formed of a substance which has been gelatinized from solution and dried is provided at the edge with a stiffening flange which is mechanically stronger than the edge of the element itself. As shown, a circular glass plate 1 forming the substratum is provided at its edge with a rim 3 by immersing the edge in a solution in acetone of a copolymeride of vinylchloride and vinylacetate, or of polyvinylbutyrate. After drying the plate 1 is placed in a vessel 4 into which a warm solution of a gelatinizable substance, such as gelatine in water, cellulose-acetate-butyrate in a mixture of xylene and isopropyl alcohol, or celluloseacetate-propionate is fed through an aperture 7 in an aspherical template 5 through which water circulates. After gellation and drying the edge of the resulting body may be covered with a further layer similar to that of the rim 3 and the two layers cut to allow the element to be separated from the substratum. Alternatively the rim 3 may be provided on one side only of the substratum. Instead of the rim a metal ring may be secured by adhesive over the edge of the element after it has been formed, or the element may be cast round such a ring. Specification 614,255 is referred to.
Patent GB-1298023-A (GB)
Title: Pulse radar system for detecting moving targets
IPC: G01S13/524
Filed: 1970-06-01
Abstract: 1298023 Pulse doppler radar HOLLANDSE SIGNAALAPPARATEN NV 1 June 1970 [6 June 1969] 26373/70 Heading H4D Relates to a pulse Doppler radar utilizing a coherent receiver and a clutter suppressor incorporating two channels feeding into a difference amplifier yielding a bipolar output for moving targets, one channel including a delay of nT where T is the fixed radar pulse repetition period. Such a radar may include an output arising from received random jamming and according to the invention such output is inhibited by an arrangement comprising two further channels, both of which are fed with the rectified bipolar signals ad one of which includes a delay of (n+m)T where m is a integer of at least one. In the embodiment, m=1, one of the further channels feeds the unipolar signels directly into a coincidence circuit and the other channel includes a delay of 2T and a monostable circuit feeding into the coincidence circuit.
Patent GB-1117607-A (GB)
Title: Improvements in or relating to arc welding
IPC: B23K9/12
Filed: 1965-06-22
Abstract: 1,117,607. Welding by fusion. J. C. HEER, [trading as HEER & CO.]. 22 June, 1965 [26 June, 1964; 17 Feb., 1965 (2)], No. 26386/65. Heading B3R. A contact and guide tube in the form of a compact body readily exchangeable as a whole from inert gas shielded metal arc welding apparatus comprises an insulator 3, a contact sleeve 4 downstream of the insulator 3 and a heat protection ring 6 downstream of the sleeve 4, the insulator 3, sleeve 4 and ring 6 together providing a passage through which the electrode 10 is fed. The sleeve 4 and ring 6 are held in a casing 1 by a screw cap 9 and the casing is screwed in to the welding apparatus. In a modification the insulator 45, the sleeve 46 and the ring 50 are retained in the casing 44 by the inturned ends of the casing 44. The ring is of hard metal or ceramic. The casing is of metal, ceramic or carbon. The insulator is of ceramic, e.g. alumina. The sleeve is of a metal, e.g. nickel-aluminium alloy carbon or sintered metal-carbon. The insulator and the sleeve may be formed by spray-deposition in the casing or by compression-moulding.
Patent GB-737396-A (GB)
Title: Improvements relating to reclining chairs
IPC: A47C1/035
Filed: 1952-10-21
Abstract: 737,396. Seats. GREAVES & THOMAS, Ltd., and DUNCAN, F. Oct. 9, 1953 [Oct. 21, 1952], No. 26388/52. Class 52 (2). In a reclining chair the back-rest is pivotally mounted on the chair frame and the seat is hingedly connected to the back-rest and has forwardly inclined links pivoted to the chair frame. A foot-rest pivoted to the seat and interconnected with the chair frame is also provided. As shown, the back-rest 4 is provided with side bars 5 pivoted at their lower ends to anchor plates 6 carried by the chair frame, the seat 3 is provided with bars 7 which are pivoted to the bars 5 and are pivotally linked to the anchor plates 6 by links 8 which are inclined forwardly in the normal position of the seat. A leg-rest 10 is pivotally connected to the front of the seat by a curved arm at each side and by a link 13 centrally to a bracket 15 mounted on a cross-member 9 which serves to support the seat when the latter is in the upright sitting position. In the fully reclining position shown, the leg-rest assumes the horizontal position but returns to vertical position as the back-rest and seat is moved by the occupant to the upright sitting position. A counterbalancing spring 17 is provided.
Patent GB-954433-A (GB)
Title: Method of welding silver/metal oxide materials
IPC: B23K28/02
Filed: 1960-07-29
Abstract: 954,433. Welding by pressure. E. DURRWACHTER, and E. BOSCH, [trading as DR. E. DURRWACHTER DODUCO KOMM. GES.]. July 29, 1960 [Aug. 1, 1959], No. 26417/60. Heading B3R. In making a weld between silver/metal oxide materials or between silver/metal oxide material and silver, silver alloy or other metal pressure is applied in a non-reducing atmosphere such that no fluid phase is involved. Silver/metal alloy may be converted by internal oxidation into silver/metal oxide or silver and metal oxide powder may be sintered, silver/cadmium oxide is mentioned. The silver/metal oxide may be welded to silver or silver alloy in a non-reducing atmosphere or may be cold pressure welded to a non-precious metal. The silver/metal oxide material may include Ni, Fe, Mo, Cr, Ti or V for rendering the material ductile.
Patent GB-601633-A (GB)
Title: Improvements in and relating to reversible direct current motor systems
IPC: H02P7/293
Filed: 1945-10-10
Abstract: 601,633. Converting; automatic current control systems. GENERAL ELECTRIC CO., Ltd., and DALE, S. H. Oct. 10, 1945, Nos. 26477/45 and 21826/46. [Classes 38 (ii) and 38 (iv)] [Also in Group XXXVII] In a system whereby a reversible D.C. motor is supplied from an A.C. source through a grid controlled rectifier and inverter in parallel, the current circulating between the converters automatically controls the ignition timing of one converter. In the examples described the circulating current is kept constant. The currents through the cross connected pairs of converters 4, 5 and 6, 7 which connect the single phase A.C. supply to the D.C. motor 14, pass through the D.C. windings of saturable reactors 12, 13 and their sum, the armature current, through the D.C. windings of saturable reactors 15, 16. The difference between the A.C. currents from source 19 through the series connected windings on reactors 12, 13 and on reactors 15, 16 which pass after rectification at 20, 21 through resistances 22, 23 is thus dependent on twice the value of the circulating current. The parts are so dimensioned that the difference in P.D. across resistances 22, 23 is proportional to the circulating current. This P.D. is applied to the grid of a valve 34 to vary the current in the biassing winding of a saturable reactor 38 in a phase changing network 36, 37, 38 through which the grids of converters 4, 5 are energized from supply 1. The grids of converters 6, 7 are energized through a similar phase changing network 47, 48, 49, the saturable reactor 47 of which is varied by current derived from the anode circuit of valve 51, the grid of which is fed from potentiometer 52 at a voltage determined by the manual setting of the potentiometer added to that generated by tachometer generator 54 coupled to the motor 14. In operation, manual setting of the potentiometer controls the speed and direction of motor 14, by varying the timing of the grids of the converters 6, 7, 'the timing of the grids of converters 4, 5 being therefore determined, since they are automatically adjusted to keep the circulating current constant. In the modification described with reference to the drawing filed with the second Provisional Specification (not shown) for controlling the motor a signal is fed to a circuit which through valves varies the biassing current of saturable reactors 38, 47 of the phase shifting networks to retard the ignition of one converter pair and advance that of the other. The difference in P.D. across the resistances 22, 23 is applied to this valve circuit to vary both advance and retard in the same sense until the circulating current is equal. To protect against excessive current flow, the voltage developed across a resistance in the armature circuit is used to produce a voltage in the controlling circuit to which the signal is fed. It is stated that similar arrangements may be used with polyphase supplies.
Patent GB-871310-A (GB)
Title: Improvements in and relating to oscillator circuits
Inventor: BOARDMAN FRANK BRIAN
IPC: H03B5/10
Filed: 1958-08-18
Abstract: 871,310. Valve generating circuits. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Aug. 18, 1959 [Aug. 18, 1958], No. 26530/58. Class 40(6) A variable frequency oscillator circuit, of the kind having positive feedback L 1 L 2  to maintain oscillation, negative feedback also being applied to the grid through the anode-grid capacitance Cag, is provided with a compensating capacitor C 2  which acts as a load to the positive feedback means and controls automatically the changes in grid potential due to frequency changes. As the impedance of C 2  decreases with frequency increase, the effective value of the transformer L 2  load increases and the feedback ratio is decreased and thus the effect of feedback increase due to frequency increase may be considerably reduced or eliminated.
Patent GB-281232-A (GB)
Title: New or improved process for the treatment of fats and oils
IPC: C07F9/09
Filed: 1927-10-07
Abstract: 281,232. B÷hme Akt.-Ges., H. T. Nov. 25, 1926, [Convention date]. Cleansing-compositions. - Fats and oils are treated with phosphoric anhydride or acetyl phosphoric acid or with mixtures of acetic acid anhydride or acetyl chloride and orthophosporic acid, giving products which are used in preparing washing agents. In examples (1) ricinoleic acid is treated with phosphoric acid anhydride and the resulting ester is saponified with soda lye to form the sodium salt. This preparation dissolved in trichlorethylene gives a washing agent which can be readily emulsified; (2) oleic acid is mixed under cooling with acetyl phosphoric acid and the ester is converted into the sodium salt. This ester dissolves alcohols, hydrocarbons, halogen hydrocarbons and heterocyclic bases.
Patent GB-456550-A (GB)
Title: Improvements in and relating to the de-airing of clay and similar plastic substances
IPC: B28B3/20
Filed: 1935-09-26
Abstract: 456,550. De-airing clay &c. WILLIS, J. M., Oakleigh House, Moira Road, and WILLIS, C. L., Rawdon, Willesley Park, both in Ashby-de-la-Zouch. Sept. 26, 1935, No. 26614. [Class 87 (ii)] In de-airing apparatus wherein clay or other material is forced from a worm chamber through slots or openings 12 in a pair of adjoining plates 10, 11 into a vacuum chamber, one plate 10 is fixed and the other is capable of movement so that the degree of register of the openings in the two plates can be varied. The plates may be circular and the openings radially arranged with concentric and radial ribs 14, 13 between them. The plate 11 may be rotated to vary the register by a pinion or worm 17 on a shaft 15 engaging a segmental rack 18. The shaft may be operable by a wheel or handle externally of the chamber. The plate may rotate on rollers carried by brackets and engaging a path on that face of the plate nearer to the vacuum chamber. In an alternative construction, the plates are rectangular and the plate 11 is slidably moved by a screw spindle engaged with a bracket on the plate by collars and screwed through the wall of the chamber. The plate may be in two halves which may be slid together or apart in this way. Specification 421,860 is referred to.
Patent GB-939284-A (GB)
Title: A safety screen for television picture tubes
IPC: H01J29/87
Filed: 1961-07-24
Abstract: 939,284. Television. J. NEUBAUER. July 24, 1961 [Jan. 31, 1961], No. 26681/61. Class 40 (3). A safety screen 1 for a picture television tube 4 forms a single assembly unit with tube supporting and fixing strap arrangement 2; the safety screen is of plasticized polyvinyl chloride between 1 and 1.5 mm. thick and may press against the tube screen with no air occlusion or be separated therefrom by a film of petroleum jelly or Canada balsam. The safety screen may be tinted to improve contrast and may carry markings to suppress reflections and the line raster.
Patent GB-895020-A (GB)
Title: Improvements in magnetic amplifiers
Inventor: GOLEBIOWSKI CZESLAW
IPC: H03F9/06
Filed: 1957-08-23
Abstract: 895,020. Magnetic amplifiers. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Aug. 22, 1958 [Aug. 23, 1957], No. 26719/57. Class 40 (9). A magnetic amplifier of the resetting type includes a bridge of rectifiers 4 and windings 3, 3<SP>1</SP> on controlled saturable cores, the supply terminals 1 and the load 2 being connected to the diagonals. The saturable cores are reset in alternate half-cycles by means of control windings 5, 5<SP>1</SP>. A signal on terminals 10 controls the conductance of triode 9 and consequently controls the re-setting currents derived from the secondary winding 6 of transformer 7. Transformer secondary 12, windings 11, rectifiers 13 and potentiometers 16, 17 are used to compensate for any lack of balance in the circuit.
Patent GB-210481-A (GB)
Title: Improvements in and relating to delivery mechanisms for printing machines
IPC: B65H29/68
Filed: 1922-10-03
Abstract: 210,481. Elsworth, T. F., Wright, F. W., Harker, P., and Mann & Co., Ltd., G. Oct. 3, 1922. Delivery apparatus.-The delivery chains of a printing-machine, having an impression cylinder continuously rotating at a uniform speed, are driven by a single-gear train so constituted as to increase the speed of the delivery chains above the uniform peripheral speed of the impression or take-off cylinder at an appropriate moment in order to gain length of travel and so improve the accessibility of the machine. The endless delivery chains a are driven from the printing-cylinder e by gearing g, p and a wheel c, which is loose on the shaft d and has internal teeth meshing with pinions b engaging a gear f fast on the shaft d, the latter also carrying a fast gear h meshing with a gear i on the shaft of the chain wheels j. The pinions b are carried by a rocker k loose on the shaft d and connected by a link m to a lever n having a runner o engaging a cam-groove r in a wheel s driven by gearing t from the impression-cylinder u. During the time the runner o is engaged by the concentric part of the camgroove r, the rocker k is stationary and the grippers x on the chains a are moving at normal speed equal to the speed of the impression-cylinder u, enabling the sheet to be taken by the grippers.. Whilst the runner o is traversing the. eccentric part of the cam the rocker k is first moved in a direction to cause the differential pinions b to speed up the chains, and then in the opposite direction to decrease the speed of the chains at the time the sheet is deposited on the delivery board w.
Patent GB-1308826-A (GB)
Title: 2 4-thiazolidine-dicarboxylic acid and its derivatives and processes  for their preparation
IPC: C07D277/06
Filed: 1970-06-03
Abstract: 1308826 2,4-Thiazolidinedicarboxylic acid derivatives FERLUX 3 June 1970 [5 June 1969 9 March 1970] 26825/70 Heading C2C [Also in Division A5] The invention comprises novel 2,4-thiazolidinedicarboxylic acid derivatives of the formula wherein R 1  is OH and R 2  is 2-trimethylammonio-ethoxy (as chloride), 2-mercaptoethylamino, 1 - carboxy - 3 - (methylthio)propylamino, 3-pyridylmethoxy, and 1-carboxy-4- guinidinobutylamino, and where R 2  is H and R 1  is carboxymethylamino, 2-mercaptoethylamino, and the magnesium, betaine and arginine salts of 2,4-thiazolidinedicarboxylic acid, and their preparation. The compounds are obtained by reacting glyoxylic acid or esters or amides thereof with 2-amino-3-mercaptopropionic acid hydrochloride or esters or amides thereof in mixtures of suitable solvents at about 20‹ C. in the presence of sodium or potassium acetate or triethylamine. 2,4-Thiazolidinedicarboxylic acid is obtained by reacting L-cysteine hydrochloride monohydrate with glyoxylic acid, followed by, if desired or necessary, esterification and/or amidification. The following intermediates are also prepared: [2 - Amino - 3 - (benzylthio)propionyl]- glycine, [2 - amino - 3 - mercaptopropionyl]- glycine, N - (benzylthioethyl) - 2 -amino - 3- (benzylthio)propionamide, 2 - amino - N - (2- mercaptoethyl) - 3 - mercaptopropionamide, 3- pyridylmethyl glyoxylate, N - (2 - mercaptoethyl)glyoxylamide, N - [1 - carboxy - 3- (methylthio)propyl]glyoxylamide, and N - (1- carboxy-4-guanidinobutyl)glyoxylamide.
Patent GB-1350487-A (GB)
Title: Process of foorming polyolefin fibres
IPC: D01D5/40
Filed: 1971-04-19
Abstract: 1350487 Fibrous polyolefins CROWN ZELLERBACH CORP 19 April 1971 [9 April 1970 3 Sept 1970] 26826/71 Heading C3P [Also in Division D2] Polyolefin fibres are prepared by a process which comprises firstly forming a gel of high molecular weight linear polyolefin, said gel comprising a fibrillar structure of fibrous polyolefin defining a network of interconnecting capillary spaces filled with organic solvent, any shear stress applied in the formation of the gel being insufficient to form discrete polyolefin fibres, and secondly subjecting the gel to shear stress sufficient to form discrete polyolefin fibres. The gel may be prepared by polymerizing an olefin in the presence of a co-ordination catalyst in a solvent for the polymer, at a temperature below the melt dissolution temperature of the resulting polymer and at a sufficiently rapid reaction rate to effect formation of the gel. Alternatively the polymerization may be effected above the melt dissolution temperature and the resulting solution cooled, or a preformed olefin polymer may be dissolved in a solvent and the solution cooled while subjecting to shearing stress sufficient to ensure the presence of macrofibrils of diameter 1 to 20 microns in the gel but insufficient to cause the presence of discrete fibres. The gel may be subjected to shear in a conventional disc refiner to give fibres of similar size to cellulosic paper-making fibres, which fibres may be formed into non-woven webs by conventional paper-making processes. Specified monomers are ethylene, propylene, butadiene, isoprene, butene-1, pentene-1, dodecene-1 and 4-methylpentene-1; and specified solvents are oyclohexane, decalin, heptane, tetralin, xylenes, toluene, hexane, isooctane, mineral oil, noctane, p-cymene and chlorinated hydrocarbons. Many examples are given describing the preparation of polyethylene and polypropylene fibres.