baber/WOPTO huggingface dataset:
Patent GB-373246-A (GB)
Title: Improvements relating to electrical switches of the plug-operated type
IPC: H01R13/707
Filed: 1931-02-12
Abstract: 373,246. Plug couplings. WANDSWORTH ELECTRICAL MANUFACTUR. ING CO., Ltd., Kenyon Street, BATCHELOR, T., 67, The Avenue, and SMITH, A. B., 85, Arden Road, both in Acocks Green, both in Birmingham. Feb. 12, 1931, Nos. 4351 and 16567. [Class 38 (i).] Combined with electric switches.-A coupling of the type in which a socket member embodies a switch that is operated by an earthing-pin or other plug attached to the plug member, has the earthing-pin &c. a sliding relatively to the body of the plug member e so that the switch can be opened and closed without disconnecting the coupling. The pin a is attached to a hand grip d that can be moved up and down in the body e to operate the switch. Instead of a direct connection between the pin a and the hand grip d, a lever or rocker may be interposed. When the plug member is disengaged resilient arms g on a collar g<1> mounted in a plate g<2>, spring inwardly and engage shoulders on the pin a, outward movement of the arms g being prevented by a collar h, see Fig. 2. When the plug member is connected, the collar h is raised by engagement with a fixed bush i, Fig. 1, allowing the pin a to be pushed down to close the switch. The arms g are thus spread and engage an internal shoulder on the bush i preventing removal of the plug member. According to one Provisional Specification the operating hand grip may be a turn-piece or button connected by a helical cam &c. to the switch actuating pin.
Patent GB-180282-A (GB)
Title: Improved manufacture of objects made from undulated cardboard
IPC: F16L11/24
Filed: 1921-02-07
Abstract: 180,282. Kreher, B. Feb. 7, 1921. Covers.-Corrugated cardboard articles are made by winding tubular bodies from a band in such a way that the corrugations of adjacent layers cross each other and are inclined to the direction of winding. As shown in Fig. 1, bands a and b with corrugations oppositely inclined are secured together by adhesive and a tubular body is wound from the composite band. As shown in Fig. 2, the band has alternate corrugated and smooth parts on its upper and under surfaces. To render the article impermeable an impregnating mixture of waterglass, graphite, tar, asphalt or the like may be used. A casing for a projectile may be formed as shown in Fig. 8. An envelope for acid bottles may be constructed as shown in Fig. 10, consisting f a tubular body u, bottom plate v, lid u<1>, and handle w. Reference has been directed by the Comptroller to Specification 9784/99, [Class 22, Cements &c.].
Patent GB-951271-A (GB)
Title: Process for the preparation of surface-active reaction products
IPC: C07C309/62
Filed: 1961-04-21
Abstract: Surface active materials are obtained by the partial epoxidation of unsaturated compounds having chains of 12 to 26 carbon atoms, oxidation of the epoxidation products with oxygen or oxygen-yielding agents, and reaction of the oxidation products with alkali metal bisulphites or ammonium bisulphite.  The products contain a -hydroxysulphonate residues, and to some extent sulphonate, sulphate and sulphite residues. The starting materials may be unsaturated hydrocarbons, alcohols, ethers, carboxylic acids, esters or amides; unsaturated animal or vegetable oils, fats and waxes may be used. After expoxidation, e.g. with a peracid, the material is oxidized by bubbling air through it at 20 to 120 degrees or by reacting it with hydrogen peroxide or a percarbonate or perborate to form hydro-peroxide groups, and then it is reacted with a bisulphite. Alternatively, the epoxidized material may be mixed with the bisulphite and then oxidized, e.g. by blowing with air.  In examples epoxidized fish oil, sperm oil, an ester of linseed oil alcohol and tetrahydrophthalic acid, and shark oil, are oxidized by blowing with air in the presence of manganese oleate as a catalyst, and then reacted with aqueous solutions of sodium bisulphite to obtain oils with surface active properties. Other starting materials are mentioned.
Patent GB-650568-A (GB)
Title: Improvements in belt pulleys
IPC: F16H55/40
Filed: 1948-02-16
Abstract: 650,568. Belt pulleys. DUXBURY, J. H., and DUXBURY, J. B. Feb. 16, 1948, No. 4411. [Class 80(i)] In a built-up pulley the spokes C are screwed up to shoulders C<SP>1</SP> thereon into reinforcing plates A secured by rivets D to the rim B. The shoulders C' of the spokes are tapered to fit into corresponding recesses in the plates A which are locked thereto by locknuts E and the ends of the spokes are rivetted over in recesses in the rim B.
Patent GB-221234-A (GB)
Title: Improvements in and relating to the preparation of mixtures of tar and bitumen or the like
IPC: C08L95/00
Filed: 1923-11-15
Abstract: 221,234. Butler, T. H., and Popham, F. J. W. Nov. 15, 1923. Testing bituminous compositions.-The bursting strain of mixtures of tar and bitumen &c. mixtures is measured by dipping a wire ring into the mixture, warmed if necessary, withdrawing. it and allowing the film produced to harden, clamping the film to a tube to which is attached a rubber tube and reservoir containing water, and raising the reservoir until the film bursts.
Patent GB-880475-A (GB)
Title: Transistor amplifier providing a balanced output signal
IPC: H03F3/26
Filed: 1957-02-09
Abstract: 880,475. Transistor amplifying circuits. MURRAY, J. S. Feb. 7, 1958 [Feb. 9, 1957], No. 4522/57. Class 40(6). A transistor amplifier comprises a driver stage in which two transistors 13, 14 having a common emitter resistor 15 and individual collector resistors 16, 17 are connected either as a long-tailed pair as shown or in push-pull, Fig. 9 (not shown), and an output stage in which two transistors 10, 12, connected in push-pull, have their base electrodes connected to the collector electrodes of the respective transistors of the driver stage and their emitter electrodes connected to opposite ends of the primary winding of an output transformer, which primary winding is split centrally with its two halves connected through a blocking capacitor C, wherein in addition a resistive potentiometer chain is connected between each side of the blocking capacitor C and earth and a further resistor 21 is connected between the base of each transistor of the driver stage and a point on the respective potentiometer chain, whereby appropriate bias voltages are provided for the base electrodes of the transistors 13, 14. The potentiometer networks connected to the opposite sides of the capacitor C also act as a common emitter resistor for signal currents and hence assist in balancing the signal currents in the two transistors 10 and 12. Further the out-of-balance signal between the capacitor C and earth provides negative feedback to the transistor 13 and, if the capacitor 19 is omitted, positive feedback to the transistor 14, thus further improving the signal balance in the output of the amplifier. Additional negative feedback may be provided by providing a signal connection between the emitter of transistor 12 and the base of transistor 14, Fig. 6 (not shown), or between the secondary winding of transformer 11 and the base of transistor 14, Fig. 7 (not shown), the capacitor 19 being omitted in both cases. In Fig. 8 (not shown) negative feedback is provided by a tertiary winding of transformer 11 connected in the emitter lead of transistor 13, while in Fig. 9 (not shown), wherein the driver stage 13, 14 is represented as being driven in push-pull from a preceding stage, the transformer 11 comprises a centretapped tertiary winding having one half connected in each emitter lead of the transistors 13, 14. Specification 809,207 is referred to.
Patent GB-125488-A (GB)
Title: Improvements in Centrifugal Pumps.
Inventor: ROSS WILLIAM
IPC: F04D7/04
Filed: 1918-03-14
Abstract: 125,488. Ross, W. March 14, 1918 Shaft couplings.-The two portions 3, 4 of the shaft are screwed into a sleeve 9 on which is keyed a soft metal core 12 fitted into the impeller 10 of a centrifugal pump.
Patent GB-502583-A (GB)
Title: Improvements in or relating to machines for assembling armature cores for generators
IPC: H02K15/02
Filed: 1938-02-14
Abstract: 502,583. Making armature cores. MACKIE & CO., Ltd., W., ROTAX, Ltd., and ROOK, A. G. Feb. 14, 1938, No. 4588. [Classes 83 (ii) and 83 (iv)]. A machine for assembling discs on an armature spindle to form the core comprises a drive shaft 4, Fig. 1, adapted to be reciprocated to move the armature spindle 6 towards and away from disc-locating means 17, the spindle being carried by a chuck 5 constrained to intermittent rotation according to the pitch of the helix required for the assembled discs, and means for alternately rotating and locking the disc-locating means, whereby the grain set of the assembled discs is arranged in a helical manner. A roller 7, Fig. 1, attached to the chuck, is spring-pressed into contact with an adjustable inclined strip 9 which on reciprocation of the shaft 4 through the handle 1 causes the chuck and the armature spindle therein to have a slight rotative movement. The discs are placed one at a time in a recess 22 in a rotatable holder 17, a spring-pressed pin. 24 engaging holes 25, Fig. 7, drilled in the discs according to the grain set thereof to locate them. The armature spindle is passed down through the holder and the disc forced into position thereon; when the chuck is retracted the lower ends of cam bars 32, 33, carried by a cross-piece 10 above the chuck, actuate a locking plunger 30 and ratchet 27 to rotate the holder 17 through a distance equal to the pitch of the grooves in the assembled core 23, Fig. 6. The grooves are thus in the form of a helix and the grain set of the discs is also helically arranged.
Patent GB-866532-A (GB)
Title: Improvements in or relating to shoes, boots and the like
IPC: B29D35/00
Filed: 1957-02-11
Abstract: 866,532. Footwear. BLOOM, N. May 6, 1958 [Feb. 11, 1957], No. 4634/57. Class 17(2) The upper 2 and inner sole 3 of a shoe are secured together and drawn on to a last 1, the outer sole 9 is laid in the bottom of a mould 4 and a vulcanisable rubber mixture which is to form the main sole 5 is placed in the mould. The upper and inner sole are positioned as shown and the mould is then heated. The inner face of the mould forms a smooth continuation of the outer face of the upper. The outer sole may be omitted, or may have bevelled extensions which are interposed between the sealing edge 7 of the mould and the upper. The extensions protect the upper 2 from sharp pressure by the sealing edge 7 during vulcanisation.
Patent GB-313542-A (GB)
Title: Improvements in steam generators or water heaters
IPC: F24H1/26
Filed: 1928-02-14
Abstract: 313,542. Fountain, H. J. Feb. 14,1928. Water - tube boilers. - A boiler having closed-ended tubes projecting radially from an annular water space is built up of a number of superposed rings 1 formed with inwardly projecting tubes 2, the rings, together with the surrounding shell 5 being held between end plates' 8, 9 by longitudinal bolts 13. The engaging surfaces of the rings may be flat or they may be formed with corresponding ribs and grooves.
Patent GB-266377-A (GB)
Title: Improvements in or relating to photographic or kinematographic film spools
IPC: G03C3/00
Filed: 1927-02-19
Abstract: 266,377. Goerz-Photochemische Werke Ges. Feb. 19, 1926, [Convention datcl. Kinematograph apparatus.- Infiltration of light along the flanges of a spool carrying a photographic or kinematograph sensitive film is prevented by providing on the inner faces of the end flanges 1 ribs or corrugations 3. arranged for example in concentric circles or spirally, with which the edges of the film and its backing paper (if any) engage to form a light-trap.
Patent GB-317293-A (GB)
Title: Improvements in or relating to waterproof coats and similar articles of wear
IPC: A41D3/04
Filed: 1929-02-12
Abstract: 317,293. Soden, S. W. Feb. 12, 1929. Linings; waterproof garments. -A waterproof coat is provided with a quilted lining secured at the junction of the sleeves with the body of the coat by a strip of fabric d attached by an adhesive at the middle of its width to the outer material a, and at its edges to the lining g of the sleeve and body respectively. The ends of the sleeves are turned in over the lining and secured by adhesive. The other edges of the lining may be attached by sewing or adhesive. The lining preferably consists of a layer of cotton wool &c., a lining fabric, and a covering of muslin, and is fixed in the coat with the muslin inwards.
Patent GB-726223-A (GB)
Title: Improvements in or relating to electric discharge devices
IPC: H01J19/30
Filed: 1953-02-20
Abstract: 726,223. Thermionic cathode tubes. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. Feb. 20, 1953 [Feb. 23, 1952], No. 4756/53. Class 39 (1). An electrode, such as an anode, which forms part of the envelope wall of a discharge device has its inner side coated with a rough surface of an inter-metallic compound, such as NiAl 3 . This may be formed by coating the anode galvanically with a few microns thickness of nickel, vaporizing aluminium thereon, and heating. Chromium may be employed instead of nickel. The roughened surface so formed has good heat-absorbing properties; and other electrodes, apart from the cathode, within the envelope may be similarly coated. German Specification 868,026 is referred to.
Patent GB-550975-A (GB)
Title: Improvements in electromagnetic interruptors
IPC: H01H50/76
Filed: 1942-04-13
Abstract: 550,975. Electromagnetic interrupters. PLESSEY CO., Ltd. (Mallory and Co., Inc., P. R.) April 13, 1942, No. 4858. [Class 38 (v)] In an electromagnetic interrupter self-alignment between co-operating contacts such as 18, 22 is secured by mounting one of the contacts, say, 18, on a tongue which can hinge about its supporting blade 14 the line of the hinging axis passing through the contact. The tongue may be produced by means of a V-shaped slot 15 in the blade 14. Specification 515,797 is referred to.
Patent GB-348686-A (GB)
Title: Improvements in or relating to snap-action electric switches
IPC: H01H5/18
Filed: 1930-02-13
Abstract: 348,686. Tumbler switches. BIGGS, H. F., 19, Bradmore Road, Oxford. Feb. 13, 1930, No. 4925. [Class 38 (v).] A quick-action switch has a contact-carrying member comprising a spring plate fixed at one end and carrying a contactmember at its free end, the plate being longitudinally slotted along part of its length and the part lying to one side of the slot crimped to give a dead-centre action. Fig. 1 shows the application to a tumbler switch. A movable bridging contact 6 is carried by the free end of a spring 5 fixed at the other end to a pillar on the base 1. Fixed contacts 7 are carried by the base. The spring 5 consists of a strip of phosphor bronze, Fig. 2, with a longitudinal slot and the part on one side of the slot crimped. The spring so constructed has two positions of stable equilibrium in which it is flexed, and it passes through a dead-centre position in between the two stable positions. The dolly 3 has a lower triangular part 3b, the carriers of which press the spring 5 against the abutment 8 causing it to take up its two positions. The open position is shown in chain lines in Fig. 1. A modified form of strip has two slots and the two outside portions crimped.
Patent GB-640000-A (GB)
Title: Improvements in and relating to pulsed radar systems
Inventor: BROWN ROBERT HANBURY
IPC: G01S13/78
Filed: 1947-02-20
Abstract: 640,000. Radiolocation; pulse circuits; radio signaling. MINISTER OF SUPPLY. Feb. 20, 1947, No. 5023. [Classes 40 (v), 40 (vi) and 40 (vii)] In a radar system of the interrogator-transponder type the interrogator transmits pairs of pulses, separated by a predetermined time interval, respectively on each of two radiating elements having divergent directions of maximum radiation, and the transponder is adapted to transmit a characteristic signal in response to the reception of a pair of pulses of substantially equal amplitudes and separated by said predetermined time interval. In the system described the interrogator is situated adjacent to and used in conjunction with a ground base primary radar system for location of aircraft, and transponders are provided on specified aircraft for identification purposes. A suitable interrogator (Fig. 1, not shown) consists of a transmitter controlled by the primary radar system and feeding pairs of equal amplitude pulses, separated by a fixed time interval, to an electronic switch whose operation is synchronized with the pulses by means of signals sent over a separate lead. The arrangement is such that pulses of each pair are radiated respectively from two dipoles disposed symmetrically about the axis of a common reflector. The pulses are thus radiated alternately on two beams whose axes lie at an angle to each other and the angle within which pulses of substantially equal amplitudes can be received is much narrower than the width of a single beam. Fig. 4 shows the preferred form of transponder in which the aerial 15 is omni-directional in azimuth and feeds signals, directed towards it from the interrogator, to receiver 17 (arranged to provide A.G.C. but to amplify the two pulses of a pair equally). The output of receiver 17 is fed to the grid of valve 18 and via a delay circuit 19 to the grid of valve 20, the valves 18 and 20 being so arranged that the difference between their anode voltages is proportional to the difference between their control grid voltages. Thus should the pulses of a pair be unequal in amplitude or have a time interval different from the delay time of circuit 19 a difference anode voltage occurs and is rectified by circuit 22 to give a negative bias on the control grid of coincidence valve 24. Valve 24 is arranged to pass anode current only when its first grid is at earth potential and the second and third grids are fed simultaneously with positive pulses from amplifier 27. Thus the anode circuit of valve 24 generates a signal only on reception at aerial 15 of two pulses of equal amplitudes and spaced by the predetermined time interval, and when this occurs the transmitter 25 is triggered to send out a characteristic reply signal from aerial 15.
Patent GB-645181-A (GB)
Title: Improvements in or relating to radar systems
IPC: G01S13/53
Filed: 1946-02-18
Abstract: 645,181. Radiolocation. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 18, 1946, No. 5092. Convention date, Sept. 28, 1944. Drawings to Specification. [Class 40 (vii)] In order to increase the signal-to-noise ratio, whenever it is less than unity, of the received signals in a pulse-radar system, a large-amplitude signal of the carrier frequency (radio or intermediate frequency) is added to the received signal before demodulation. In one embodiment one sideband of the received echo signals is removed in the I.F. stages of the receiver. The output from the side-band filter is mixed with a signal of the transmission frequency which is applied through a filter from the radar transmitter. The combined signal is applied to the second detector, the output of which is amplified and displayed on a cathode-ray tube indicator having a circular sweep. In a second embodiment, the locally-produced, large-amplitude, signal is obtained from the I.F. circuits of the receiver, so that the occurrence of a difference in frequency between the received and locally-produced signals, due to the Doppler effect, is prevented. The intermediate frequency signal is passed through a narrowband filter to remove noise modulation, amplified and then mixed with the single-sideband signal as before. The narrow-band filter is preferably tunable as the intermediate frequency varies due to the Doppler effect. In a third embodiment employing both sidebands of the received signal, means are provided to maintain the added signal in phase with the carrier of the received signal. The locallyproduced signal is derived from the transmitter and an adjustable phase-shifting circuit is inserted in between the carrier-frequency filter and the mixer wherein the two signals are combined.
Patent GB-1367702-A (GB)
Title: Method of stabilizing c-nitroso compounds
IPC: C07C201/16
Filed: 1971-02-22
Abstract: 1367702 Stabilization of nitroso compounds IMPERIAL CHEMICAL INDUSTRIES Ltd 21 Jan 1972 [22 Feb 1971] 5095/71 Heading C2C The invention comprises C-nitroso compound containing in a stabilizing amount a compound of a heavy metal (as defined on pages 60-61 of Lange's Handbook of Chemistry, revised 10th edition, 1967, published by McGraw-Hill). Preferred c-nitroso compounds are nitrosocyclohexane, nitrosobenzene, 4-nitrosodiphenylamine N-4-nitrosophenyl-N-phenylhydroxylamine, pdinitrosobenzene, 2,6-dimethylnitrosobenzene and α-nitrosonaphthylene. The preferred heavy metals are cerium, mercury, manganese, copper or cobalt in the form of salts of hydrochloric, hydrobromic, hydroiodic, acetic or phenylacetic acid or chelates of acetylacetone or Schiff's bases. The heavy metal compound is preferably used in an amount of from 0À01 to 1% by weight of the nitroso compound.
Patent GB-554401-A (GB)
Title: Direct-fired unit air heaters
IPC: F24H3/08
Filed: 1942-04-17
Abstract: 554,401. Heating air. DRAVO CORPORATION. April 17, 1942, No. 5116. Convention date, Jan. 5. [Class 64 (i)] Air is forced by fans 9 vertically through a casing 4 over a horizontal combustion chamber 3 and return-flue tubes 13. The bottom part of the combustion chamber is lined with refractory material 15 applied in a plastic condition. The products of combustion are projected from a burner along the lower part of the combustion chamber and are deflected by a baflfe 170 to the upper part from which they flow to return flues arranged above or below the chamber. The gases are exhausted by a fan 14. The air fans may be arranged either at the top or bottom of the casing which is either suspended or supported on a stand. U.S.A. Specification 2,115,057 is referred to.
Patent GB-1398381-A (GB)
Title: Correlators
IPC: G01F1/7082
Filed: 1972-02-03
Abstract: 1398381 Correlation of noise-modulated signals KENT INSTRUMENTS Ltd 2 June 1972 [10 June 1971 3 Feb 1972] 27366/71 and 5184/72 Heading H4D Two noise-modulated signals for which a particular modulation characteristic occurs earlier on one than on the other are crosscorrelated by subjecting the one signal to at least three different delays to give three or more delayed signals, multiplying the said other signal separately by each of the delayed signals, combining the resulting products in pairs, mixing the combination results to give a mixed signal, and adjusting the delays so as to reduce the mixed signal to zero. The Fig. 3 system, for fluid flow measurement, includes transducers 8, 9 each receiving an ultrasonic beam from respective transmitters (not shown). The beams are phase-modulated by random variations in the flow. Detectors 51, 52 are phase-sensitive and provide a filtered and amplified output in digital form. The upstream output is fed to a shift register 54 with output taps 58-61. Delayed signals from the taps are multiplied with the downstream signal by gates 68-71. The products are combined and integrated by networks 62, 64, then the results are mixed at 56. The mixed signal adjusts the shift register clock 55 frequency, and hence the delays afforded by the register, in a direction to minimize the mixed signal. The clock frequency is then a measure of the transit time of fluid between the transducer locations. In modifications the detectors may be frequency-sensitive and analogue delay devices may be used instead of the shift register. The invention is applicable also to pseudo-randomnoise-modulated radars.