baber/WOPTO huggingface dataset:
Patent GB-112344-A (GB)
Title: Improvements in Electric Switches.
Inventor: MCLEOD THOMAS
IPC: H01H3/50
Filed: 1917-02-20
Abstract: 112,344. McLeod, T. Feb. 20, 1917. Electrically - released switches. - Relates to local switches of the kind in which the contact member is maintained in the closed position by an electromagnet which carriesthe current flowing through the switch so that the switch can be brought to the open position by momentarily opening the main switch, and consists in so arranging the springs, which assist in producing the opening movement when the switch is released, that the degree of extension or compression is dependent upon the value of the current flowing through the switch. By these means, similar switches may be used for large and small currents, the small holding-on force in the case of a small current being counterbalanced by a small spring force. In the arrangement shown in Figs. 1 and 2, the vertical core e which carries the movable contact-member g passes freely through the pole-piece d and is guided by a pin f depending from the upper polepiece c. The switch is moved to the closed position by the tumbler-lever i engaging a pin on the core. The contact-member g engages plunger contacts m, n adjustably spring-pressed by the spring s. If the switch is supplying a large current, the solenoid a holds the core in such a position that the springs s' are strained considerably and, when the circuit is broken at the main switch, these springs assist the weight of the core in pushing the contact-member downwards out of tha contact position. With a small current, the springs s are less strained so that the smaller holding force is adequate to maintain the switch closed. An adaptation to the pressed type of switch is shown in Fig. 5, in which the contacts m, n are fixed, the cores b and the collar p are fixed on the operating spindle o, and a single spring s is arranged between the contact member g, carried loosely by the spindle, and the collar. Instead of compression springs s, Fig. 1, a single extension spring may be used attached to a yoke connecting the inner ends of the plunger contacts. Instead of a rectilinearly moving contact-member g, a pivoted contact member may be employed. The form shown in Fig. 5 may be modified by mounting spring-pressed contacts as shown in Fig. 1 on the arm g or by employing a contact arm in the form of a flat spring.
Patent GB-391917-A (GB)
Title: Improvements in and relating to road manhole frames and covers
IPC: E02D29/14
Filed: 1932-01-27
Abstract: 391,917. Manhole frames and covers. BROAD & CO., Ltd. and NAYLOR. F.,4 South Wharf, Paddington, London. Jan. 27, 1932, No. 2501. [Class 107.] A manhole cover and frame of the type having tongues 12 on one member adapted to engage grooves 19 on the other member by a rotating or helical movement of the cover, is provided with one or more radial recesses 25 in the peripheral surface of the cover and corresponding slots 26 in the frame, as shown in Figs. 3 and 4, whereby a crowbar or the like may be entered and used leverwise to rotate and lift the cover. The tongues 12, which may be arranged on .the cover, are each provided with one edge 13 inclined at an angle of approximately 45 degrees to the lower edge 14 of the rim 15 of the cover and the other edge 16 inclined at an angle of approximately 120 degrees to the edge 14. The gaps 19 extend completely through a ledge 18 in the frame and have one edge 20 inclined to correspond with the edge 13 of the tongues 12 and the other edge 21 inclined at an angle slightly less than 120 degrees. Ribs 24 are provided either on the surface of the ledge 18 or on the annular edge of the rim 15. When the cover is inserted in the frame, the edges 16 of the tongues rest upon the shoulders 21 A. of the gaps 19 and the weight of the cover then causes the tongues to slide down into the gaps so as to rotate the cover until the edges 13 of the tongues engage the edges 20 of the gaps and the ribs 24 seat firmly upon the abutting surface of the rim 15 or ledge 18. The ends of the recesses 25 in the cover are inclined in the opposite direction to the tongues 12, and the undersides of the slots 26 in the frame are downwardly inclined. The Provisional Specification describes the provision of one or more obliquely-formed entry slots in the frame for the crowbar which is adapted to engage beneath a lip on the cover.
Patent GB-1298541-A (GB)
Title: Hydroxydithioaromatic carboxylic acids, derivatives thereof and process for their manufacture
Inventor: FUCHSMAN CHARLES H
IPC: C10M135/18
Filed: 1971-01-19
Abstract: 1298541 Lubricant compositions FERRO CORP 19 Jan 1971 2547/71 Heading C5F [Also in Division C2] Hydrocarbon lubricants may contain compounds of the general formula wherein X is hydrogen or an equivalent of a metal or R<SP>1</SP>; R is alkyl and R<SP>1</SP> is an alkyl or cycloalkyl group containing up to 18 carbon atoms, an aralkyl group of 7 to 14 carbon atoms, an alkoxyalkyl group of 3 to 8 carbon atoms, an alkylthioalkyl group of 3 to 8 carbon atoms, a dialkylaminoalkyl radical of 3 to 12 carbon atoms, or a hydroxyalkyl radical of 2 to 15 carbon atoms.
Patent GB-302074-A (GB)
Title: Improvements in and relating to clutches
IPC: F16D7/02
Filed: 1928-01-26
Abstract: 302,074. British Thomson-Houston Co., Ltd., and Morton, C. J. Jan. 26, 1928. Driving-arrangements.- A toothed wheel 3 is connected to a driving-shaft 2 by a coupling device which will slip and not transmit shocks to a driven device such as a combined lighting and ignition set on a motor bicycle. A disc 1 secured to shaft 2 fits into a recess in the web of wheel 3. On the opposite side of the web is a recess containing a ring 4 of material having a high coefficient of friction. A second disc 5 slidably splined on the shaft 2 is pressed against the ring 4 by a cupped spring washer 7 adjusted by a nut 8. The wheel 3 is centred on a sleeve 6 projecting from disc 5.
Patent GB-913620-A (GB)
Title: Improvements in or relating to axial-flow compressors
IPC: F01D5/14
Filed: 1961-01-23
Abstract: 913,620. Axial-flow compressors. SZYDLOWSKI, J. Jan. 23, 1961 [Feb. 3, 1960], No. 2628/61. Addition to 757,471. Class 110 (1). In an impeller for an axial-flow compressor, particularly a compressor forming part of an aircraft jet-propulsion or gas turbine plant operating at transonic and supersonic speeds, the cross-section of each blade at the tip has a profile with two successive opposed curvatures while the cross-section at the root has a profile with a single curvature. At the tip of each blade, the camber line C 4 , Fig. 4, has a portion C 4b  near the trailing edge 10 with centre of curvature at O 4b  and a portion C 4a  of opposite curvature near the leading edge 9 with centre of curvature at O 4a .The blade is twisted from root to tip, as shown in Fig. 5, the cross-sections progressively changing from the double-curved form at the tip to a single-curved form at the root. Specifications 693,227 and 697,119 also are referred to.
Patent GB-867946-A (GB)
Title: Non-woven textile fabrics and the manufacture thereof
IPC: D04H3/05
Filed: 1959-01-26
Abstract: 867,946. Fabrics composed of adhesively united yarns. ROMANIN, B. Jan. 26, 1959 [Jan. 25, 1958], No. 2696/59. Class 140. A non-woven textile fabric comprises a first set of longitudinally arranged yarns and a second set of yarns arranged in undulating non - intersecting parallel paths, spaced apart transversely of the first set of yarns and in a plane parallel thereto, which cross the paths of the first set of yarns, the yarns of one set being bonded to the yarns of the other set where the paths cross so that the two sets of yarns are secured relative to one another. Yarns of any natural or synthetic material may be used, e.g. cotton, silk, flax, jute, wool, spun viscose, spun acetate, polyamides, polyesters, polyvinyl alcohol, polyvinyl chloride, vinyl copolymers, acrylic, olefinic, polyethylene, polypropylene and glass. The yarn may comprise short fibres or continuous filaments. Bonding may be effected autogenously by heat and/or pressure, or by use of an adhesive. Specified adhesives are rubber latex, epoxide polyester resin, vinyl resin, natural gum and glue. As shown (Fig. 1B) four sets of yarns 11, 12, 13 and 14 unwind from beams 11<SP>1</SP>, 12<SP>1</SP>, 13<SP>1</SP> and 141 respectively. Yarns 11 and 12 pass through stationary combs 15 and 15<SP>1</SP> and yarns 13 and 14 pass through movable combs 16 and 161 which latter have a reciprocating movement as indicated by arrows in Fig. 2. Yarns 11 and 12 have a straight rectilinear motion. Yarns 11 are displaced with respect to yarns 12 and movable yarns 13 and 14 pass between them (Fig. 3). When all the yarns pass between rollers 18, 18<SP>1</SP> they are pressed together so as to become engaged as shown in Fig. 4. Rollers 18, 18<SP>1</SP> besides pressing and drawing the yarns may also serve to apply an adhesive material from trough 19. Alternatively, the adhesive may be applied .by cylinders 20, 20<SP>1</SP>. Due to the combination of the advancing motion imparted by rollers 18, 18<SP>1</SP> and the alternating motion of combs 16, 16<SP>1</SP>, the two yarn sets 13 and 14 become laid out in undulating paths approximately of sinusoidal shape as shown in Fig. 2. Thereafter the resulting structure is dried in oven 23 and may then be vigorously rolled by rolls 24 (Fig. 1A) whereby the different sets of yarns are forced substantially into a common plane, and finally wound on beams 26, 261.
Patent GB-136367-A (GB)
Title: Improvements in Electric Fuses.
IPC: H01H85/147
Filed: 1919-02-05
Abstract: 136,367. Coates, W. A., and British Westinghouse Electric & Manufacturing Co. Feb. 5, 1919. Fusible cut-outs.-In a fuse with knife-blade contacts 3 of the self-alining type, each contact is loosely mounted in a slot 2 in the carrier, and retained in position by a pin 13 passing loosely through a transverse hole in the contact and held in place by the fuse tubes 5, 6. The orifices for these fuse tubes are preferably square in section so as to allow of ventilation, tight fitting, and small variations in tube diameter.
Patent GB-992902-A (GB)
Title: The copolymerization of alpha-olefins
IPC: C08F10/00
Filed: 1964-01-22
Abstract: A catalyst composition suitable for the copolymerization of olefins, consists of the product obtained by mixing in an inert solvent, an aluminium alkyl dihalide, a vanadium oxytrihalide or tetrahalide, and an aromatic nitrile.  The mol. ratio of the aluminium alkyl dihalide to the vanadium compound is from 1:1 to 10:1, and the mol. ratio of aluminium alkyl dihalide to the nitrile is from 1.5:1 to 5:1.  The solvent may be benzene, toluene, xylene, or perchloroethylene. The aluminium component may be aluminium ethyl or isobutyl dichloride, or aluminium ethyl dibromide.  The vanadium component may be the oxytrichloride, tetrachloride, oxytribromide, or tetrabromide. The preferred nitriles are phenyl acetonitrile, and benzonitrile. The copolymerization and recovery of the copolymers is effected by conventional "low-pressure" techniques.  The olefins copolymerized are preferably ethylene, and/or propylene or butene-1, and optionally a minor amount of a diolefin such as cyclopentadiene. The copolymers may be sulphur vulcanized.
Patent GB-553119-A (GB)
Title: Improvements in or relating to circuit arrangements for use in the transmission of ultra high-frequency electric oscillations
IPC: H03B19/10
Filed: 1942-03-06
Abstract: 553,119. Changing phase and frequency. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). March 6, 1942, No. 2981. [Class 38 (ii)] [Also in Group XL] High frequency oscillations are multiplied in frequency or changed in phase by application to a number of amplifying systems of such dimensions and operating voltages that the transit times of the electrons in the various amplifying systems differ by 1/n of the period of the oscillations or by a whole multiple of this period. The systems are preferably such as to have all the same effective mutual conductance and to exhibit the same effective input damping. Fig. 2 shows a star-connected three-phase input 15, 16, 17 applied to valves 2, 3, 4 having differently spaced control and screen grids arranged so that the anode currents in the common output circuit 18 are in phase. Alternatively the inputs may be single phase and the output three-phase, Fig. 1 (not shown). Fig. 3 shows a method of driving push-pull voltages by differing valves 2, 3. The valves may be in a single envelope and comprise two anodes with a single grid and cathode and differing spacing between the two sides of the control and screen grids to co-operate with the two anodes, Fig. 4 (not shown). Alternatively a push-pull circuit may be connected to a single sided circuit by a pair of dissimilar valves, Fig. 5 (not shown), which may be in a common envelope with two separate control grids, Fig. 6 (not shown). Frequency multiplication may be effected by a pair of valves, Fig. 7 (not shown) which may have a single envelope as shown in Fig. 8 with an input circuit connected to the control grid 6 and an output circuit connected to the anode 8 and having appropriate spacing between the grid 6 and the screen grid 7 to give such transit times as to produce the multiplication.
Patent GB-719094-A (GB)
Title: Improvements in or relating to containers for light-sensitive material
Inventor: BLABER MICHAEL PERCY WILLIAM
IPC: G01T1/08
Filed: 1952-02-05
Abstract: 719,094. Radiation dose-meters. KODAK, Ltd. Feb. 5, 1953 [Feb. 5, 1952], No. 3013/52. Class 98(1) In a dose-meter comprising a watertight sheath enclosing a piece of photographic. material sensitive to X-rays, y-rays or like penetrative radiation, and an ampoule of developing and fixing solution, so that upon fracturing the ampoule the photographic material becomes immersed in the solution, all within the sheath, the sheath is made of transparent material, at least where the developed image is positioned, and is enclosed in a removable light-tight container which is transparent to X-rays, y-rays or like radiation and constructed so that the ampoule can be broken without removing the sheath therefrom. As shown, a sheath 1 of transparent plastic encloses a photographic silver halide paper 3 and an ampoule 5 containing a combined developing and fixing solution. The ampoule is surrounded by a woven braid covering 6, to prevent pieces of the fractured ampoule from puncturing the sheath 1. The walls of the sheath may be sealed at several points beneath the ampoule to hold it in position. The sheath is loaded, in a darkroom, into a slot 9 in a drawer 8. A shell 11 slides over the drawer, and a pin inserted in holes in the ends of the drawer and shell prevents the shell from being forced prematurely on to the ampoule. In this condition, the cassette is carried by a person liable to exposure to X-rays, y-rays, or like radiation. To discover whether there has been such exposure, the pin is removed, and shell 11 is pushed down to fracture the ampoule. The ends of the shell and drawer are of complementary shape, so that the processing liquid is forced (within the sheath) into contact with the paper 3. When the time for processing has elapsed the cassette is opened and the sheath is withdrawn so that the paper may be inspected to see if it has been exposed to radiation.
Patent GB-812785-A (GB)
Title: Red lead
IPC: C01G21/10
Filed: 1957-01-28
Abstract: Red lead of a particle size of less than 0.1 microns, which may contain free divalent or tetravalent lead oxide, is obtained by oxidizing a divalent lead compound in an aqueous medium at a temperature of 10 DEG  C. to 45 DEG  C. to form Pb3O4, and precipitating the Pb3O4 at a pH of at least 6.5.  The lead may be in the form of the sulphate, chloride, nitrate, acetate, carbonate, oxide, hydroxide or a plumbite, and may either be suspended or dissolved in the aqueous medium; the oxidation may either be performed with an oxidizing agent, such as hypochlorites, hypobromites, chlorine, bromine, lead dioxide, lead tetrachloride, lead tetraacetate, hydrogen peroxide, peroxides such as sodium peroxide, persulphates and perchlorates, hypochlorites being preferred, or electrolytically, for example by electrolysing a suspension of lead hydroxide in a sodium chloride solution which may contain lead chloride.  The electrolysis may be carried out in batches or continuously.  The lead compound may be contacted with the oxidizing agent at a pH of at least 6.5, preferably pH 9-11. Pigments.-The Pb3O4 as prepared above is suitable for use as a pigment in rust-preventing base coat paints, either alone or mixed with other pigments, such as barium sulphate, gypsum, ferric oxide, ferroso-ferric oxide, ironmica, white lead, sulphur, lead cyanamide, zinc oxide, barium carbonate, calcium carbonate, magnesite, dolomite, fuller's earth, bentonites, montmorillonite, kaolin, graphite, and artificial filling materials.  The Pb3O4 content should not be less than 25 per cent. The Pb3O4 may be precipitated together with the other material.  In an example, a suspension of lead hydroxide and barium sulphate or ferric oxide is oxidized with sodium hypochlorite to give the desired mixed pigment.  The pigment may be mixed with linseed oil to give the desired paint. Specification 698,153 is referred to.
Patent GB-295213-A (GB)
Title: Improvements in and relating to the production of benzanthrone derivatives
IPC: C09B3/04
Filed: 1927-02-02
Abstract: 295,213. Anderson, I. B., Thomson, R. F., Thomas, J., and Scottish Dyes, Ltd. Feb. 2, 1927. Benzanthrone derivatives are prepared by trearing 3-alkoxy or hydroxy-4: 4<1>-diamino 1: 1<1>-naphthylphenyl-2<1>-carboxylic acid with an alkali in aqueous solution. The starting material may also be substituted in the 2, 5, 6, 7, 3', 5<1> or 6<1> position by univalent groups such as alkyl, halogen or alkoxy. According to the examples, a mixture of 6-Bz1-diamino-Bz2-methoxybenezanthrone and 6-aminobenzanthrone-Bx1. Bz2.oxide is formed when 4 : 4<1>-diamino-3-methoxy-1 : 1<1>- naphthylphenyl-2<1>-carboxylic acid hydrochloride is dissolved in caustic soda solution and heated until no more methylamine, is evolved: similar treatment of 4: 4<1>-diamino-3-oxy-1 : 1<1>-naphthylphenyl-2<1>-carboxylic acid gives 6-Bz1-diamino- Bz2-oxybenzanthrone in the cold, and then on heating a mixture of this and 6-aminohenzanthrone-Bz1. Bz2-oxide by Joss of ammonia. 4 : 4<1>-Diamino-3-alkoxy or hydroxy-1: 1<1>-naphthylphenyl-2<1>-carboxylic acid is prepared by coupling #-naphthol with diazotized m-aminobenzoic acid, reducing the resulting azo compound in acid solution, and if necessary alkylating the product.
Patent GB-163409-A (GB)
Title: Improvements in devices for excluding draughts from doors
IPC: E06B7/20
Filed: 1920-02-02
Abstract: 163,409. Stanfield, M. Feb. 2, 1920. Draught-excluders.-A draught-excluder for the bottom rails of doors is hinged between lugs on plates which are preferably slotted so as to be adjustably attached to the door, and is actuated by a lever on striking the jamb of the door. The actuating-lever may be adjustably secured to the excluder by a slot l, Fig. 4. One of the securing screws g of the hinge abuts against a stop n on the upper leaf of the hinge to permit of adjusting the opening. A bow spring e tends to open the excluder.
Patent GB-828298-A (GB)
Title: Improvements in windscreen wipers
IPC: B60S1/38
Filed: 1956-01-31
Abstract: 828,298. Windscreen cleaners. TRICO PRODUCTS CORPORATION. Jan. 31, 1956 [June 31, 1955], No. 3101/56. Class 138(1). - A windscreen wiper comprises a flexible wiper blade unit 8, 13, Fig. 12, a pair of levers 23b, Fig. 14, pivoted together by a spring hinge 24, 28 (see Fig. 12) and extending in opposite directions with their outer ends applying pressure to the end parts of the blade unit and an arm attaching member 20 connected to the pair of levers at or close to their pivot 24, pressure being transmitted from the member 20 to the outer ends of the levers and also to a point on the blade unit close to the pivot 24. The wiper arm attaching member 20 has a hole 21<SP>1</SP> to receive a shoulder 21 on the end of the wiper arm 17, the shoulder being interlocked in the hole by a spring 21<SP>11</SP>. Ears 25<SP>1</SP> on the member 20 are apertured to receive the pivot pin 24 which also passes through apertures in the inner ends of the levers 23b, Claws 47 on the inner end of one lever 23b slidably embrace the backing strip 13. The claws may be provided on the ears 25<SP>1</SP> instead of as shown. Surrounding the pin 24 within the levers is the spring 28 the ends 30 of which bear on the levers to urge their outer ends towards the wiper blade 8, 13, pivoted movement of the levers about the pin 24 being limited by stop lugs 34, Fig. 14. The member 20 may be pivoted to a lever at a'position distinct from the pivot between the levers. The outer ends of the levers 23b are pivotally connected to yokes 22, the ends 32 of which also slidably embrace the backing strip 13. Flexibility of the strip 13 may be increased by notching the sides of the strip or cutting away dovetail shaped portions in the manner described with reference to Figs. 10 and 11, (not shown). In another form of wiper, the member 20 and the inner pivoted ends of the levers are not positively connected to the central portion of the wiper blade but merely bear thereon and in a modification the outer yoke is formed of two parts pivoted together by a spring hinge. Means are provided as described with reference to Fig. 15 (not shown) to alter the tension in the wiper arm spring and thus vary the pressure between the blade and the windscreen. If desired the wiper arm may cooperate with a cam fixed relative to the wiper actuating shaft housing so that as the wiper arm oscillates it is caused to rotate about its longitudinal axis in the manner described with reference to Fig. 16 (not shown). Specifications 702,849, 702,899, 702,900, 735,538 and 823,032 are referred to.
Patent GB-668942-A (GB)
Title: Improved anti-burglary apparatus
IPC: G08B15/00
Filed: 1950-02-07
Abstract: 668,942. Burglar alarm systems. RELYA-BELL BURGLAR & FIRE ALARM CO., Ltd. Feb. 7, 1950. [Feb. 7, 1949] No. 3163/50. Class 118 (i). [Also in Group XVIII] Antiburglary apparatus for articles which are displayed or otherwise accessible to the public comprises an inertia electric contact device which is associated with means to remove the articles to a place of safety. Fig. 1 shows a shop window in which articles B are arranged on a platform which is urged by a spring to rotate about an axis 2, but is retained in position by detent means 8. An inertia operated switch 13 is arranged in contact with the window frame so that vibration of this frame closes the contacts and operates an electromagnet to release the detent means 8. The platform then rotates to discharge ti.e articles into a receptacle or chute, and after rotating 180 degrees may be locked in position by a spring bolt 10 to prevent-access to the articles. A battery, which is continually maintained charged from the main supply, is used to operate the electromagnet. The inertia operated switch may be associated with relays, and may be used in alarm systems, operating on either the closed-circuit or the open-circuit principle. Alarm bells, or a telephone alarm system in which a recorded message is transmitted to a central station may be utilised. The display arrangement may alternatively consist of a cabinet which closes under corresponding conditions of interference, or of platforms which move horizontally or vertically in conjunction with self-locking flaps which operate to prevent access to the: articles. The invention may also be applied to counters or table tops having rotating flaps which operate to discharge the articles into a lower receptacle. A manual or pedal operated switch may also be provided for use by an authorised operator to operate the device. Examples of suitable types of relay circuit are described.