baber/WOPTO huggingface dataset:
Patent GB-246269-A (GB)
Title: An improved draw bar hook or safety coupling
IPC: B61G7/14
Filed: 1924-12-01
Abstract: 246,269. Franks, T. Dec. 1, 1924. Safety hooks.-A drawbar hook or coupling for use with railway vehicles to prevent accidental uncoupling on inclines &c., comprises a hook member 1 having laterally projecting pins 2 with flat sidefaces disposed at right angles to the shank of the hook. A keeper 3 surrounding the hook member is provided with keyhole slots in which the pins 2 are accommodated, the arrangement being such that the keeper can only be turned to open the hook, when it is lifted so that the pins 2 are in the circular portion 6 of the slot. The keeper 3 is subsequently retained in the locked position by gravity. The hook may be integral with the draw-bar or secured thereto by riveting &c., and is disposed horizontally. The pins 2 may be on the keeper engaging a reversed slot in the hook member.
Patent GB-1371170-A (GB)
Title: Delta modulation decoders
IPC: H03M3/02
Filed: 1972-06-20
Abstract: 1371170 Delta modulation decoder WESTERN ELECTRIC CO Inc 20 June 1972 [22 June 1971] 28726/72 Heading G4H A decoder for a variable step size delta modulation bit stream, each bit occupying a given frame period, comprises means for generating a current for a variable time interval during each frame period, the currents generated causing step changes in the reconstructed analogue signal via a capacitor and means responsive to individual bits of said stream for causing generation of and determining the direction of the current and means responsive to a plurality of bits of said stream for varying the time interval and hence the size of the step change. The decoder may also comprise syllabic companding by varying the current in response to longer term variations in the pulse stream. The apparatus is described in a transmitter but functions in the same way in a receiver. The input analogue waveform is fed to comparator 11 (not shown) and compared with the voltage on capacitor 47. The difference output is regularly quantized (output 1 when voltage on capacitor 47 is smaller) and the pulse stream is fed to memory device 41 and current source 43; the current output being positive for a "1" and negative for a "0". Memory device 41 stores the preceding pulse and compares it with the present pulse. If they are the same, an increase pulse on line 426 steps up counter 42 and if different a decrease pulse on line 42c steps down the count. The outputs of counter 42 (42-1 to 42-n) (one per count) are fed to AND gates 41-1 to 44-n respectively. A second counter 45 is fed from high speed clock 46. The outputs from this counter are not linear but occur at, for example, 1, 2, 4, 8, 16 &c., and are connected also to AND gates 44-1 to 44-n so that output 42-x of counter 42 corresponds to output 45-2<SP>x-1</SP> of counter 45. The outputs of the AND gates are connected via OR gate 48 to switch off current source 43 and counter 45. Clock 14 (which has the same frequency as the quantizer clock) changes the count in counter 42, starts current source 43 and resets counter 45. Clock pulses from high-speed timer 46 (which is at least 2<SP>n-1</SP> times as fast as clock 14) count up counter 45 until an output corresponding to the count in 42 is reached, when the current source 43 and counter 45 are stopped. The output voltage on capacitor 47 thus rises or falls in increasing steps when the input pulses have the same polarity, but the step size decreases when the pulse polarity changes. Syllabic companding may be incorporated by using a capacitor stored voltage to control current source 43. Current is steadily subtracted from this capacitor and only added to it when there is an increase signal on line 42b. This reduces the size of the output voltage steps and enables closer approximation to the desired analogue voltage. When used in a receiver, the input is fed to the memory device 41 and current source 43 and the output voltage on capacitor 47 is low-pass filtered.
Patent GB-337533-A (GB)
Title: Improvements in and relating to the treatment of waste liquors
IPC: D21C11/04
Filed: 1929-09-23
Abstract: 337,533. Courtaulds, Ltd., Jones, R. S., and Pearson, S. Sept. 23, 1929. Treating-materials.-In the treatment of waste liquors so as to remove from them the sulphur of alkaline sulphides, the liquor is first treated with acid until neutral or very slightly acid, in the presence of the sulphur dioxide radicle. A sufficient quantity of the latter may be added if required in the form of sulphur dioxide itself or of a compound containing it. On mixing the mass, part of the sulphur settles out. The liquor left is then treated with caustic alkali in the presence of a zinc or magnesium salt until it is wholly alkaline, preferably to phenol phthalein, when zinc or magnesium hydrate and the rest of the sulphur settle out. The treatment may consist in adding to the waste liquor solutions of zinc or magnesium sulphate and sodium bisulphite together with sufficient sulphuric acid, mixing in a tank, and then adding caustic alkali until the whole liquor is alkaline to phenol phthalein.
Patent GB-930038-A (GB)
Title: Improvements in or relating to combined transmitting and receiving apparatus
IPC: H03C1/36
Filed: 1961-08-09
Abstract: 930,038. Modulating arrangements; combined transmitting and receiving apparatus. CHARBONNAGES DE FRANCE. Aug. 9, 1961 [Aug. 26, 1960], No. 28825/61. Class 40 (5). Relates to a transmitting circuit for a portable combined transmitting and receiving apparatus, including an oscillator having at least one transistor, and an amplifying and modulating stage also having at least one transistor, wherein a part of the emitter load of the final transistor in the amplifying and modulating stage is constituted by the input transistor of the oscillator, the remainder of the load impedance consisting of passive circuit elements. The transmitter of the apparatus comprises an oscillator stage of the Hartley type built around a transistor T3, the winding P being tuned with a capacitor C4 to the desired transmission frequency. T3 is also included as part of the emitter load of the output stage of an amplifier/modulator section built around the transistors T1 and T2, the input to which is derived from a microphone stage EC. It is said that this method of connection gives a linear modulation characteristic and allows the transistors to be operated in the linear regions of their characteristics. The apparatus also contains a section including an input stage T4, a detector Dl and a lowfrequency amplifier T5 which acts as a receiver. EC may act as a phone in this arrangement, the switches I1, I2, I3 determining whether the apparatus is used as a transmitter or a receiver.
Patent GB-536815-A (GB)
Title: Improvements in lubricating systems
IPC: F16N29/02
Filed: 1939-10-27
Abstract: 536,815. Hydraulic accumulators valves. EYRE SMELTING CO., Ltd., and HIGGENS, C. C. Oct. 27, 1939, No. 28828. [Classes 69 (ii) and 135] [Also in Group XXXIV] In a system for feeding lubricant under pressure to a number of lubricating points from a single supply source the lubricant is pumped at high pressure and low velocity to an accumulator or pressure regulator connected by pipes of large cross-sectional area to supply points comprising metering devices through which the fuel passes at a lower pressure through pipes connected to the bearings. Fig. 1 shows a motor driven pump supplying lubricant from a tank 2 to a dead weight accumulator 4 connected by a pipe 5 of large cross-sectional area to restricted orifice control devices 12 from which lead rigid or flexible tubes 5b coupled by bayonet connections to the bearings. The pump 1 is driven by an electric motor 3 controlled by a main switch 10 and an automatic switch 8 opened or closed by a weighted chain 9 attached to the accumulator 4. When the switch 10 is in the open position a 3-way valve 7 allows the lubricant to flow from the accumulator back to the tank 2. A spring-loaded escape valve 6 in the pipe 5 prevents excessive pressure. To allow for variations in the viscosity of the lubricant the weights on the accumulator should be adjusted until the lubricant issuing from a jet 13b on the pipe 5 into a measuring cup of water operates a balance beam'supporting the measuring cup in a pre-determined time. The accumulator 4 may comprise as shown in Fig. 2, a cylinder formed with a flange 4a to support loading rings 15 and carrying a ring 4b slidable on a central pedestal 16. The lubricant is supplied through the pedestal 16 and a hollow piston 17 to a space above a cup washer 17a at the top of the cylinder which is closed by a removable cap 4g. A ring 16e screwing on the pedestal allows the descent of the cylinder after removal of the cap 4g when the cup washer is to be changed. Fig. 4 shows a suitable lubricant control device comprising a conical valve spindle 18 adjustable in a sleeve 19 threaded into the body of the device relatively to an orifice 18b. The spindle 18 is secured when adjusted by a lock-nut 20. The sleeve 19 is normally held in contact with a washer 19a by a spring 20a but may be turned to allow a temporary increase of flow of the lubricant. A spring- loaded ball 23 is provided in the inlet to the control device. A pointer 21 opposite a disc 22 on the spindle 18 indicates the setting of the valve. Instead of the accumulator 4 a pressure regulator may be provided consisting of a cylinder fitted with a spring-loaded plunger which on being forced upwards by the lubricant permits the return of excess lubricant back to the container.
Patent GB-640581-A (GB)
Title: A process for the purification of ketones by distillation
IPC: C07C45/78
Filed: 1947-10-29
Abstract: <PICT:0640581/III/1> Crude ketone containing secondary alcohol, aldehydic material, water, and hydrocarbons having higher boiling points than the ketone, is fed into a fractionation zone and the aldehydic material is either withdrawn as vapour or converted into higher boiling compounds by introducing a suitable reagent, the bottoms from the fractionating zone are passed to a second fractionating zone from which a liquid side stream is withdrawn from a point where the concentration of hydrocarbons is high, while substantially pure ketone vapours are withdrawn overhead and aqueous alcohol is withdrawn at the base; the side stream is scrubbed with water and the hydrocarbons are then separated from the aqueous solution of ketone and alcohol so obtained; this aqueous solution is passed into the first fractionating zone.  The process is applicable to the purification of acetone, methyl ethyl ketone, mesityl oxide, acetonyl acetone, cyclohexanone, and acetophenone; and is particularly useful in removing olefine-polymers, formed by undesirable side reactions in the dehydrogenation of secondary alcohols, from the crude ketone. Crude acetone containing 0.02 per cent aldehydes and 0.19 hydrocarbons, obtained by the oxidation of isopropanol, is passed through heat-exchanger 3 and line 2 into column 4 which contains 30 to 40 bubble trays.  Acetone vapours containing 2.4 per cent aldehydes and 6 per cent hydrocarbons, are withdrawn from the head of the column and condensed; the condensate being partly eliminated from the system and partly returned as reflux to the column.  The liquid withdrawn from the base of column 4 contains 0.2 per cent hydrocarbon-polymers, and is passed through line 17 into column 19 which contains 35 to 45 bubble trays. Liquid amounting to 0.2 to 0.3 of the charge to column 19 is continuously withdrawn from the zone of high polymer concentration therein, by means of one or more lines 21, 22, 23.  This liquid is passed into accumulator 28 and is then forced together with water introduced at line 33, through mixing-coil 32.  The mixture is allowed to separate in chamber 36; the polymer is eliminated from the system through line 41, and the aqueous layer is passed to column 4 via lines 37 and 39. The heads from column 19, which contain 99.6 per cent acetone, may either be condensed and, except for reflux, eliminated from the system; or they may be still further purified in column 62.  Aqueous isopropyl alcohol is withdrawn from the base of column 19.  A dilute solution of sodium hypochlorite or other alkali hypohalite, in an amount not substantially in excess of that equivalent to the aldehydic material, may be added through line 76 into accumulator 8 at the head of column 4; in which case the reaction mixture is passed into column 4 through line 11 and light hydrocarbons are vented through line 13.  The reaction products are eliminated from the system at the base of column 19 (salts) and also through line 41 (chloroform).  Specification 392,652 is referred to.
Patent GB-709179-A (GB)
Title: Improvements in reconditioning used photographic developer solutions
IPC: G03C5/31
Filed: 1952-11-17
Abstract: Bromide irons are removed from used photographic developer solutions by dialysis through a semi-permeable membrane on the other side of which is water.  The membrane may be parchment paper impregnated with gelatinous aluminium hydroxide, chromium hydroxide or ferric hydroxide, or it may be collodion treated with caustic alkali and protamines as in U.S.A. Specification 2,510,262, or it may be regenerated cellulose nitrate.  A solution of cellulose nitrate in an ethyl alcohol/ether mixture is poured over a rotated glass tube and the layer so formed is dried.  More than one layer may be applied and the tube then immersed in water and dried at a controlled humidity, or it may be swollen in an ethyl alcohol/water mixture before drying. The membrane is then slipped off the tube or it may be treated with alkalis.
Patent GB-747083-A (GB)
Title: Improvements in or relating to cyanine dyes
Inventor: FRY DOUGLAS JAMES
IPC: C09B23/06
Filed: 1954-10-07
Abstract: Dye bases of the general formula:-<FORM:0747083/IV(c)/1> wherein R1, R2 and R3 are alkyl groups, and R4 is an alkyl or alkoxy group, R2 and R1 together containing less than 12 carbon atoms, and the corresponding compounds wherein the benzene ring may carry alkyl, alkoxy, aryl or halogen substituents, are made by reacting the corresponding meso substituted methyl thiacarbocyanine dye salts as described in Specification 717,858, with a strong base such as an alkali metal hydroxide or alkoxide, sodamide or trimethyl benzyl ammonium hydroxide.  The reaction may be carried out by refluxing in pyridine or ethanol.  In the above formula the alkyl groups may contain up to four carbon atoms or may be higher alkyl groups and the alkoxy groups may be derived from such alkyl groups.  Examples are given wherein the central carbon atom carries acetylcarbethoxymethylene, diacetylmethylene, or acetylcarbomethoxy methylene groups.
Patent GB-1063756-A (GB)
Title: Process for the production of polyamides
IPC: C08G69/18
Filed: 1964-07-14
Abstract: Lauric lactam is polymerized in the presence of an acid of phosphorus or a compound which forms an acid of phosphorus under the polymerization conditions as catalyst.  Catalysts specified are: phosphoric, phosphorous, hypophosphoric and pyrophosphoric acids, and mono-, di- and tri-ammonium phosphates. 0.01-3% may be used.  The reaction may be carried out also in the presence of water and a material which modifies the molecular weight of the product, e.g. stearic, adipic or sebacic acid.  An inert atmosphere, e.g. N2 or CO2, of atmospheric or super-atmospheric pressure and a reaction temperature of 280-300 DEG  C. may be used.  Less than 1% of the product may be extracted with methanol.  The product may be injection moulded into tubes or bottles or made into fibres.
Patent GB-873162-A (GB)
Title: Improvements in and relating to universal joints
IPC: F16D3/34
Filed: 1959-08-25
Abstract: 873,162. Universal joints. RZEPPA, A. H. Aug. 25, 1959, No. 29005/59. Class 80 (2). A constant velocity ratio universal joint comprises inner and outer races 10, 12 having part-sperical surfaces 17, 23 in sliding engagement with each other, axial grooves 24, 28 in the races containing rollers 32. Two separate surfaces 80, 84 of curved cross-section are formed on each roller 32, these surfaces having greater radii of curvature than the radius of curvature of the roller. The co-operating surfaces 26, 30 of the grooves 24, 28 are plane. The arrangement is such that the torque which can be transmitted by a universal joint according to the invention is greater than can be transmitted by a joint of similar dimensions and type having balls, instead of the rollers 32, arranged between the two races. As shown, each roller 32 is guided by a pin 40 having part-spherical ends engaging in notches 48, 50 in the inner and outer races, screws 56 preventing the pins from falling radially outwards of the joint. The inner race 10 is splined to receive a shaft 16, and the outer race 12 is connected by bolts to a shaft 18.
Patent GB-438750-A (GB)
Title: Improvements in smoking devices having means for preventing nicotine contained in the tobacco smoke from being absorbed by the smoker
IPC: A24F1/00
Filed: 1934-10-10
Abstract: 438,750. Cigarettes etc.; tobacco pipes &c. GAUTRON, L. G., 29, Rue de la CoulouvreniÞre, Geneva, Switzerland. Oct. 10, 1934, No. 29046. Convention date, Oct. 15, 1933. [Class 130] A smoking-device is provided with a rubber valve which is mounted within, or in communication with, a reservoir that retains any nicotine passing through the valve, and the reservoir has no free communication with the mouthpiece. As shown in Fig. 2, a tube 62 is mounted on the end of a cigar or cigarette and supports a slit rubber cap 12 through which smoke is drawn into a reservoir 6a and passes, as indicated by the arrows, between tubes 60, 61 and tubes 61, 62 and through a filtering-disc 47 into the mouth. In a modified form, the tube mounted on the end of the cigarette supports coaxial slit rubber caps surrounded by a reservoir, and the smoke is drawn into the mouth through a filtering-disc at the end of the reservoir. As applied to a tobacco pipe, or cigar or cigarette holder, Fig. 1, the smoke is drawn through coaxial slit caps 2, 3 and passes between tubes 50, 52 and tubes 52, 51 and through a filtering-disc 9 into the mouthpiece. Nicotine collects in a reservoir 6 provided with a drain plug 7. In the construction shown in Fig. 4, the smoke is drawn through a rubber cap 15 into a reservoir 22 provided with a drain plug 23 and passes through a filtering-disc 18 to the mouthpiece. The smoke passes through a tube carrying a rubber cap 16 which prevents saliva from passing towards the bowl. The joint between the mouthpiece and the stern is formed by a member 25 which is screwed into the mouthpiece and is a force fit in the stem.
Patent GB-156382-A (GB)
Title: Improvements in and connected with luggage carriers and pillion seats of cycles
IPC: B62J1/14
Filed: 1919-11-24
Abstract: 156,382. Lombard Rim & Tube Co., and Gray, T. Nov. 24, 1919. Back-rests.-A cycle luggage-carrier is made with its horizontal part of bars a<3> of U-section connected by transverse bars a<4>, a<5>, a<6>. Preferably the bars a<3> have flanges d<2>, d<3>, Fig. 4, and receive the under parts of T-section bars forming the underframe of a pillion seat f, which may be turned about pivots g<2> to form a back-rest for the driver. In this position it is supported by stays h which engage with the ends e of the grooves d, and normally may be turned under the flanges and supported by lugs h<3>.
Patent GB-336762-A (GB)
Title: Improvements in condiment and like holders
IPC: A47G19/24
Filed: 1929-09-26
Abstract: 336,762. Bode, F. H. Feb. 23, 1929, [Convention date]. Powders distributers. -A condiment or like holder has a perforated cap and crushing rollers inserted so as to rotate upon and around the perforated cap while the holder is in use. A container with an exteriorly screw threaded neck c is closed by a perforated cap d of celluloid or like material provided with radial ribs g on the upper and lower surfaces and retained in position by a screw threaded, flanged ring h which presses a depressed, annular flange on the cap on to the upper edge of the neck c. Two rollers l roughened or with longitudinal serrations are mounted on a common shaft supported centrally of the rollers by a loop formed in a narrow strip r of metal, this strip being bent as shown and the loop being formed in a portion of the strip depending through a central hole in the cap d. When the holder is shaken, the rollers rotate on their common shaft and also rotate around the cap, but thep may also be moved by rotating the strip r by hand.
Patent GB-292397-A (GB)
Abstract: 292,397. Marks, E. C. R., (Heywood- Wakefield Co.). Oct. 3, 1927. Beat-up motions; shuttles.-In looms for weaving reed, or stake and strand fabrics &c., the stakes are inserted in the sheds by a weft inserter or shuttle comprising pincers on a block sliding on a member fixed to the loom frame and are beaten up by a reed 24 on a lay carried by .arms 34 operated by a forked rod 33 and a grooved cam 30.
Patent GB-496772-A (GB)
Title: Process and oven for the low temperature distillation of coal lignite and similar substances
IPC: C10B7/10
Filed: 1937-10-27
Abstract: 496,772. Low-temperature carbonization. TASSARA, F. Oct. 27, 1937, No. 29328. Convention date, Oct. 27, 1936. [Class 55 (i)] Coal, lignite, &c. is subjected to low temperature distillation in thin layers 9 separated by heat distributing metal diaphragms 8 by a single passage through an elongated horizontal chamber 2 surrounded by an oven 1, the column of fuel layers and diaphragms being compressed by a feeding screw 6 or similar device and a closure member such as a door 11. The material to be distilled and the diaphragms are introduced through openings 5 and 7 respectively at the inlet end of the chamber, gases are removed through an offtake 10 and the carbonized material and diaphragms are discharged by raising the door 11 intermittently. The distilling chamber may extend into a discharge chamber 2<1> provided with a depending tube 13 dipping into a water seal 14. The column may comprise a preheating zone at about 250-400‹ C., a distillation zone at about 600‹ C. and a cooling zone. Specification 216,691, [Class 55 (i)], is referred to.