baber/WOPTO huggingface dataset:
Patent GB-663166-A (GB)
Title: Improvements in or relating to antenna
IPC: H01Q19/02
Filed: 1948-02-27
Abstract: 663,166. Aerials. DEPARTMENT OF COMMERCE, DIRECTOR OF THE OFFICE OF TECHNICAL SERVICES OF. Feb. 27, 1948 [Sept. 19, 1945], No. 5964/48. Class 40 (vii). A broad band antenna system comprises a primary element and a reflector together with a further element positioned to alter the phase of some of the energy reflected back to the primary element relative to the rest so that the primary element is more closely matched to the system. It is stated that such a system is less frequency sensitive than previous arrangements and can handle a wider frequency band. The system may comprise a waveguide fed dipole 13 in a paraboloidal reflector 10 (shown cut away). A disc 14 reflects energy back to the reflector 10 and resonator 15 prevents coupling to the outside of the guide. Between the dipole and the reflector an annular disc 16 is placed on the guide at approximately an eighth of a wavelength in front of the reflector and of such size that the amount of energy reflected back into the aerial feed therefrom counterbalances that from the reflector 10. The size and precise position of the reflector 16 may be determined by experiment, it need not be circular or flat but may, for example, be elliptical in outline or paraboloidal in shape. In another embodiment, Fig. 2 (not shown), a wave-guide horn directs energy into a paraboloidal mirror the centre portion of which is covered by a reflecting element placed approximately an eighth of a wavelength in front of it and fulfilling the same purpose as the element 16 in Fig. 1. By moving the compensating reflector an integral multiple of half wavelengths nearer the radiator the increase in the side lobe energy caused by its insertion is reduced, on the other hand the band width is also reduced. A compromise is to have a series of reflectors of increasing size, Fig. 3 (not shown), spaced a half wavelength apart, the final and largest one being an eighth of a wavelength from the paraboloidal reflector. A system producing a horizontally polarized beam sharp in the horizontal plane, Fig. 4 (not shown), may consist of a waveguide fed mirror comprising a portion of a paraboloid as cut by two parallel horizontal planes parallel to the axis, the centre portion of the mirror carrying an auxiliary reflector spaced in front of it or an auxiliary reflector supported by the wave-guide being arranged to lie in a similar position. This reflector is made small in the horizontal direction. The system, or the mirror only, may be pivotally mounted to change the direction of the antenna radiation.
Patent GB-1494971-A (GB)
Title: Epoxy resin compositions
IPC: C08G59/68
Filed: 1976-02-16
Abstract: 1494971 Epoxy resin compositions DOW CHEMICAL CO 16 Feb 1976 5994/76 Heading C3B A composition comprises (a) an epoxy resin and (b) as a catalyst, for the reaction of the epoxy resin with compounds containing phenolic, carboxylic acid or carboxylic anhydride groups, a phosphorus compound in which each R is a C 1-20  hydrocarbon radical and R<SP>1</SP> represents in which R<SP>1</SP> is H or a C 1-20  hydrocarbyl radical; R<SP>2</SP> is H or C 1-20  alkyl; R<SP>3</SP> is H, C 1-20  alkyl, carboxyl or C 1-20  alkoxy carbonyl; n is 0-20; and A<SP>(-)</SP> represents an anion. Examples relate to the use of the catalyst for (a) curing epoxy resins with polycarboxylic acids or anhydrides; (b) reaction of epoxy resins with (meth)acrylic acid; (c) reaction of epoxy resins with dihydric phenols to form higher M.W. linear epoxy resins. These reactions form the subject matter of Specification 1,494,972.
Patent GB-291526-A (GB)
Title: Improvements in or connected with diaphragms for acoustic instruments
IPC: H04R7/02
Filed: 1927-03-03
Abstract: 291,526. French, R. March 3, 1927. Diaphragms for loud-speakers and other acoustic instruments are characterized by being formed with grooves or ridges so that the crosssection is of varying thickness. They may be made of the desired form by moulding, diepressing, or by grinding, machining, or otherwise abrading or cutting one or both sides of the surface. In particular the impressions or depressions may be of spiral or honeycomb formation; or they may be made to coincide, with the stationary-wave formation established in the diaphragm when under vibration.
Patent GB-588951-A (GB)
Title: Improvements relating to the cylinders of two stroke cycle internal combustion engines
IPC: F02B75/02
Filed: 1945-03-12
Abstract: 588,951. Cylinders. CROSSLEY BROS., Ltd., CARTER, H. D., and KENWORTHY, A. R. March 12, 1945, No. 6084. [Class 7 (ii)] In a multi-cylinder two-stroke engine having inserted cylinder liners, the distance between the cylinder axes is reduced by dispensing with portions of. the cylinder barrel b between the liners and the air inlet passages d while retaining their cross-sectional area. The Figure is a cross section of the cylinders slightly removed axially from the line of the ports c.
Patent GB-363905-A (GB)
Title: Improvements in or relating to the manufacture of pile fabrics
IPC: D03D39/00
Filed: 1931-02-26
Abstract: 363,905. Warp pile fabrics. MICHAELIS, G. and RAWACK, W., (trading as MICHAELIS & BEHREND), 12, Retzowstrasse, Nowawes, near Potsdam, Germany. Feb. 26, 1931, No. 6111. Convention date, March 10, 1930. [Class 142 (iv).] In weaving warp pile fabrics having coloured pile warps, selected ones of which according to the pattern are raised over wires 10 to form pile, each such selected pile warp thread is carried to the back of the fabric and bound or interlaced in half turn weave around a single ground or base warp thread 1 by crossing it under the thread and inserting a weft 9 as shown, the unselected pile warps remaining untwisted in the fabric above the round warp. These wefts 9 pass over the binding warp threads 7, whilst others 8 pass under these threads. As shown in Fig. 4, the fabric may have three wefts 8, 9, 11. The back pattern resembles that in Oriental carpets. The wefts 8 may be introduced below the wires 10. To make the fabric resemble a Persian carpet, the ground warps may be allowed to project and be knotted into fringes.
Patent GB-645931-A (GB)
Title: Method and apparatus for the control of electrostatic fields
IPC: B05B5/10
Filed: 1946-02-27
Abstract: <PICT:0645931/III/1> <PICT:0645931/III/2> In apparatus for controlling the strength of an electrostatic field used in a paint-spraying apparatus such as that described in Specification 591,474, means are provided whereby the potential difference between spaced-electrodes is automatically reduced so as to prevent spark-over, in the event of the electrode spacing becoming less than a predetermined minimum.  In Fig. 1 the one electrode 17 is connected through a rectifier 19 to the high-voltage winding of a transformer 20 and is associated with a paint-spraying gun 16, whereas the other electrode, which is grounded, is formed by the object 15 to be sprayed, or by a conducting-backing therefor.  The primary of the transformer 20 is connected to a source of supply 40 <PICT:0645931/III/3> through the contacts 38, 39 of an electromagnetic switch 35, which has its holding-coil 36 connected in series with maintaining-contacts 37 and the contacts of a relay 30 across the supply 40.  The switch 35 is closed by a manual switch 41 having contacts 42 in parallel with the contacts 37.  In the event of the electrode-spacing becoming less than a predetermined safe minimum, the increased field-current causes an increased voltage drop across a resistor 22, thereby decreasing the bias on the triode 25 which conducts, so as to energize the relay 30, open the switch 35 and de-energize the transformer 20.  The switch 35 may include a pair of contacts 43 connected to a signalling-device 45 which indicates when the transformer 20 is de-energized. Normally-closed contacts 47 in the triode circuit, open on actuation of the starting-switch 41, so as to prevent the energization of the relay 30 in the event of a starting surge. In Figs. 2, 3, a succession of objects 50 suspended from a grounded conveyer 51, are passed through the field created by a cage-like electrode 52 supporting a plurality of wires 56, the paint being introduced by spray-guns 53.  In the event of an object 50 becoming displaced so as to reduce the spacing between itself and the electrode 52, it interrupts one or more light-beams 61 . . . 64 projected from sources 60 and reflected by mirror-systems 65a, 65b, on to photo-electric cells 66 . . . 69. The photo-electric cells energize relays 71 . . . 74 which in turn control the energization of electromagnetic switches 76 . . . 79, which are so connected that as the light-beams 61 . . . 64 are successively interrupted and the relays 71 . . . 74 open, the potential applied by an auto-transformer 100 to the primary of the transformer 20 is progressively reduced, being finally cut off on interruption of the beam 64.  The apparatus may be re-set manually by a switch 110 when a displaced object 50 no longer interrupts the beam 64, or it may be re-set automatically by eliminating the contacts 90 from the switch 79.  Specifications 604,567 and 644,593 also are referred to.
Patent GB-105949-A (GB)
Title: Improved Method of Solidifying Liquid Pharmaceutical Preparations.
Inventor: COFMAN-NICORESTI CAROL ADOLPH
IPC: A61K47/12
Filed: 1916-05-01
Abstract: 105,949. Nicoresti, C. A. Cofman-. May 1, 1916. Solidified oils.-Liquid paraffin and solutions of drugs in liquid paraffin or in alcohol are solidified by the addition of salts of higher fatty acids. Hard paraffin or wax may also be added in small quantity. Sodium stearo-palmitate (animal soap) may be added to the liquid paraffin &c. or the acids and the base may be added to separate portions to be afterwards mixed. Reference has been directed by the Comptroller to Specifications 964/92, 12446/93, and 2343/04.
Patent GB-345062-A (GB)
Title: Improvements relating to hektographic materials and blankets
IPC: B41M5/08
Filed: 1930-02-25
Abstract: 345,062. Printing-surfaces. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.- (Ditto, Inc. ; 2243, West Harrison Street, Chicago, U.S.A.) Feb. 25, 1930, No. 6208. Drawings to Specification. [Class 100 (ii).] Titanium oxide is added to glue-glycerine hectograph compositions in order to render the composition opaque and to mask the colour of the ink after it has sunk in and so facilitate the inspection of subsequently applied offsets. Preferably, À5 per cent of the oxide is added during mixing, and the composition is then applied to a flexible backing sheet in the ordinary way.
Patent GB-377719-A (GB)
Title: Improvements in and relating to prepayment meter mechanism
IPC: G07F15/00
Filed: 1931-02-27
Abstract: 377,719. Prepayment mechanism for meters. CONNOR, R., Tame Side Works, Dobcross, near Oldham, and MEASUREMENT, Ltd., Townsend House, Greycoat Place, London. Feb. 27, 1931, No. 6226. [Class 27.] Price-changing mechanism.-In prepayment meter mechanism of the kind having two trains of gearing interposed between the meter spindle and the epicyclic quantity mechanism and adapted to be brought into operation alternatively, the trains of gearing are supported in a carriage constantly urged, as by a spring, towards one of two positions but prevented from moving into that position by a detent device which is tripped by a cam after a predetermined rotation of the meter mechanism. As applied to the mechanism described in Specification 201,972, [Class 27, Coin-freed apparatus &c.], the two trains d, e and h, g are mounted on a carriage a, Figs. 1 and 3, rockable about a spindle b, which is driven from the meter and carries a driving wheel f in engagement with the wheels d, h of the respective trains. With the carriage in the position shown, the wheel e drives the epicyclic gear through a wheel g, the commodity being supplied at the dearer rate. The carriage is constantly urged by a spring to disengage the wheels e, g and engage the wheel j with a wheel k, in which position the commodity is supplied at the cheaper rate, the carriage being, however, held by a spring- dressed detent n engaging a pin u adjustably mounted by an arm v on the carriage. The detent n is carried by an arm m pivoted at o and having a pin p engaging a notched cam q, which is integral with a heart-shaped cam r, these cams being driven through a friction dutch by a wheel t of the main meter-driven train. After a predetermined consumption, the pin p enters the notch q<1> of the cam q to release the carriage and the cheaper rate is brought into force. The carriage is reset at the beginning of each quarter by means operated by emptying the coin-box. The coin-box 9 has a pivoted catch lever 7, the end 6 of which engages a pawl 4 on the end of a lever 2 pivoted at 3. The upper end of the lever 2 carries a pivoted arm 10 having a pin 12 to engage a pin 13 on the carriage a, when the lever is rocked in an anticlockwise direction by pulling out the coin-box. A cranked portion 14 at the top of the lever 2 thrusts a spring-controlled plunger 15 against the heart-shaped cam r and returns the cams to their initial position. The resetting may, however, be performed by hand. Indicators.-The shaft carrying the cams q, r has a pointer w working over a dial x to show the amount of commodity to be consumed before the change-over to the cheaper rate takes place.
Patent GB-1026536-A (GB)
Title: Apparatus for remoulding pneumatic tyres
Inventor: MASSEY JOHN HENRY
IPC: B29D30/54
Filed: 1962-02-17
Abstract: 1,026,536. Remoulding tyres. REGENT TYRE & RUBBER CO. Ltd. Jan. 29, 1963 [Feb. 17, 1962], No. 6230/62. Heading B5A. In tyre remoulding apparatus wherein air or steam is applied directly to the interior of the tyre the bead-seating surfaces 11 are formed on sealing discs 8 and 9 urged towards each other by springs 19 located on guide pins 15 carrying stop nuts 17.
Patent GB-1463216-A (GB)
Title: Pigment pastes
IPC: C09C3/10
Filed: 1975-02-14
Abstract: 1463216 Pigment pastes BAYER AG 14 Feb 1975 [16 Feb 1974] 6286/75 Heading C4A [Also in Division C3] A pigment paste contains 3-74% wt. of an organic or inorganic pigment, 6-50% wt. of a polyurethane resin and 20-90% wt. of an organic diluent, in which the polyurethane resin used is a reaction product of at least one aromatic diisocyanate with at least one C 2 -C 10  polyol and at least one C 6 -C 8  mono-alcohol, optionally mixed with shorter- or longer-chain monoalcohols or ethylene glycol monoethers, the percentages being based on the total weight of pigment paste. Preferred polyols are C 5 -C 8  diols and/or trimethylolpropane. The monoalcohols may be aliphatic, cycloaliphatic or aromatic. The monoalcohol may be benzyl alcohol or phenoxyethanol. The resins preferably have a melting range of 80-120‹ C. and a viscosity of 10-120 cp. at 25‹ C. measured as a 40% wt. solution in ethylene glycol monomethyl ether acetate. Thickeners, e.g. silica and montmorillonites, and fillers, such as kaolin, talc or blanc fixe can be added to the pigment paste. Suitable solvents include those which are free of OH groups, e.g. alkyl and/or aryl esters of di- or poly-basic acids, e.g. adipic, phthalic or phosphoric acid; esters of aromatic or aliphatic monocarboxylic acids with polyols, e.g. glycerol triacetate, esters, ketones and aromatic hydrocarbons. Other solvents include OH-containing esters or ethers. Suitable pigments are those of the azo, anthraquinone, azaporphine, thioindigo, quinacridone, dioxazine, naphthalenetetracarboxylic acid, perylenetetracarboxylic acid or isoindolinone series; metal complex pigments or dyestuff lakes, zinc sulphides, cadmium sulphides and selenides, ultramarine, titanium dioxides, iron oxides, nickel- or chromiumantimony-titanium-oxides, cobalt blue, chromium oxides, chromates and carbon black. In the examples pigment pastes are prepared using as the polyurethane resin: either (1) the reaction product of 2,4- and 2,6-tolylene diisocyanate (80/20 mixture), trimethylolpropane and either (A) n-octanol, or (B) 1-methylcyclohexanol and 2-ethylhexanediol, or (C) glycol monoethyl ether and n-octanol; or (2) the reaction product of 2,4- and 2,6-tolylene diisocyanate (65/35 mixture), cyclohexanol and 2,2-dimethyl-1,3-proanediol; as the pigment :- carbon black, rutile titanium dioxide or copper phthalocyanine, and as solvent:- tributoxyethylphosphate; a branched polyether of M.Wt. 4800; diphenyl 2-ethylhexylphosphate; tributylphosphate. The pigment pastes can be used to colour ether-based or ester-based polyurethane foams or one component lacquers with NCO groups.
Patent GB-325704-A (GB)
Title: Improvements in or relating to door locks
IPC: E05B65/22
Filed: 1929-02-27
Abstract: 325,704. Parkes, S. R. Feb. 27, 1929. Latches, sliding; striking plates for latches.- A vehicle door lock of the kind in which is incorporated a door locking mechanism to prevent unauthorized interference and made operative from inside and outside of the vehicle, comprises the use of a single spring s to control the deadlocking mechanism t and the inside lever handle k. The sliding bolt d, constructed as shown in cross-section, Fig. 8, may be withdrawn by the inside lever handle k, which is pivoted on the same axis as the follower L of the exterior handle and engages a lug n<2> of the bolt. The dead-locking mechanism comprises the cam extension t for engagement with a shoulder y of the lever k. The spring s is located around the follower L and one end is attached to the lever k by the peg w, the other end x bearing against a boss of the cam t. This boss is formed with flat faces which substantially enclose a right angle, and movement of the cam t into or out of engagement with the lever k causes the spring s to bear against one or other of these plates and secure the parts in the position in which they are left. The cam t is operative by an inside handle u or by an outside key. The striking plate, Fig. 7, is made with a hole c for the peg b, Fig. 3, and with lips e for contact with the sliding bolt d, the underside of the plate being tapered at g for engagement with the tapered face f of the bolt. The parts are made from pressed steel.
Patent GB-452490-A (GB)
Title: Improvements in or relating to electron valves
IPC: H03B9/02
Filed: 1935-02-28
Abstract: 452,490. Discharge apparatus. NAAMLOOZE VENNOOTSCHAP MACHINERIEEN-EN APPARATEN FABRIEKEN MEAF, 30, Croeselaan, Utrecht, Holland. Feb. 28, 1935, No. 6415. Convention date, March 1, 1934. [Class 39 (i)] A valve for ultra-short wave use comprises a resonator having a resonance space closed on all sides with the exception of a narrow gap and having a greater characteristic impedance in the vicinity of potential nodes than in that of potential loops. In one form, a hairpin cathode 4 is tensioned between two bars 5, 5<1>, surrounded by a metal tube 6 which has an open gridportion 7. The outer wall 8 of the resonator has two toroidal portions 9 and two portions 10, 11 forming short-circuiting condensers with the tube 6. The upper end of the tube 6 forms a quarter-wave aerial 12, the counterbalance 13 of which is a continuation of the tube 11. A control-grid may be arranged around the cathode so as to form with it a second resonator which may be excited by an external input or coupled reactively to the first resonator. The cathode may comprise a filament and an exciter anode. The tube may operate in a Barkhausen-Kurz 2 or a magnetron circuit. The surfaces bounding the resonance space may be highly polished and may be copper- or silver-plated. Specification 429,863 is referred to. The Specification as open to inspection under Sect. 91 comprises also the subjectmatter of Specifications 449,920, and 452,761. In addition it states that the outer and inner walls of the resonator may be sealed together in air - tight fashion so that the outer wall forms the envelope of the device. This subjectmatter does not appear in the Specification as accepted.
Patent GB-890331-A (GB)
Title: Method and apparatus for processing torque stretch yarn
IPC: D02J13/00
Filed: 1958-02-28
Abstract: 890,331. Crimping and finishing yarns. STODDARD, N. J., and SEEM, W. A. Feb. 28, 1958 [April 19, 1957; Sept. 9, 1957], No. 6525/58. Classes 120(2) and 120(3) Improved control over the physical characteristics of "torque-stretch" yarns is obtained by subjecting such yarns to selected temperatures and tensions (which may be ambient or zero respectively) that in correlation modify the latent and/or manifest properties. The treatment may be effected continuously with the production of "torque-stretch" yarns, or may follow shortly after production, or may be carried out when yarn packages have been stored for varying periods and serves to equalize yarn characteristics regardless of the period of storage. The tension during a part of the yarn treatment may be such as to stretch the yarn followed by treatment at minimum tension. In addition to heat and tension false twist may also be applied, preferably in reverse order to the prior falsetwisting. In one example, a running 70 denier polyester "torque-stretch" yarn is subjected to 2 grams tension at 300‹F. whereby extensibility is reduced from 300% to 3%, residual shrinkage and lustre are reduced and bulk is increased. The degree of dimensional stability is said to depend upon the amount of tension applied to a heated yarn; 60 grams of tension at 350‹F. results in a 30 denier nylon yarn having good stability and low stretch which, when the yarn is knitted into a stocking, produces an article that does not twist on a bias. In another example, a "no-torque" yarn produced from a 70 denier nylon yarn that has previously been twisted with 70 turns per inch Z, set at 435‹F. and reverse twisted 70 turns S is passed through a false twist tube which first imparts 50 turns S at a tension of 30 grams and at 450‹F., followed by 50 turns Z. This yarn has high bulk. Apparatus may consist of a preliminary tensioning device 2, Fig. 2, feed rolls 3, a heater 5, tensioning device 6 and take-up package 8 rotating at a speed sufficient to tension and extend the yarn forwarded by the feed rolls 3. Instead of the tensioning device 6, further feed rolls may be employed to apply the necessary tension. Where it is desired to prepare the "torque-stretch" yarn continuously with the after-treatment, the arrangement of machine elements may be feed rollers, heater, false-twist tube, feed rollers, heater, followed by either a tensioning device or further feed rollers. The heaters may be plates as in Fig. 2, insulated tubular heaters as 251 in Fig. 13a, or rollers rotating in a hot liquid as 285 in Fig. 13a. Thermostats may control the heaters. In the apparatus illustrated in this Figure, the "torquestretch" yarn is prepared between package 246 and rollers 254, and the after-treatment follows rollers 254. Anti-static arrangements may be utilized. Specifications 803,106, 803,107, 803,108, 803,110, 850,230 and 890,332 are referred to.