baber/WOPTO huggingface dataset:
Patent GB-435109-A (GB)
Title: Multifocal lenses
IPC: G02C7/06
Filed: 1934-03-08
Abstract: 435,109. Spectacle lenses. CULVER, E., 42, Coolhurst Road, Crouch End, and EMERSON, S. A., 24, Wentworth Park, Finchley, both in London. March 8, 1934, No. 7434. [Class 97 (i)] A trifocal lens is made by preparing a button by assembling, such as by fusion, pieces of glass of high and intermediate refractive indices in such a way that the pieces of intermediate index are on either side of, or partially or entirely surround the piece of high index, the button so formed being surfaced to the required countersink and then united to a blank of low refractive index having a corresponding depression curve. The button may be made by forming in a piece of glass 1 of intermediate index a hole or slot into which is fused a piece of glass 4 of high index. A portion of the button is removed by cutting, for example along the line 5, Fig. 7, and the part so removed is replaced by a piece 6, Fig. 10, having the same refractive index as the blank to which the button is to be fused. The button is fused into a depression in the blank 7, and after grinding &c. a lens as shown in Fig. 15 is obtained having a distance field 7, an intermediate field 1 and a reading field 4. By cutting along the line 13, Fig. 7, a lens is obtained in which the reading field is entirely surrounded by the intermediate field. The button may be reduced to a central strip by cutting along the lines 19, 20 so that in the finished lens the intermediate field occurs only at the sides of the reading field. In an alternative method of making the button two pieces 25, Fig. 28, of intermediate refractive index are fused to the sides of a piece 26 of high index, and pieces 27, 28 of low index are then fused to the upper and lower edges to form a circular button. Specifications 255,941, [Class 97 (i)], and 346,866 are referred to.
Patent GB-636715-A (GB)
Title: Improvements in trays of milk coolers
IPC: A01J9/04
Filed: 1948-03-12
Abstract: 636,715. Milk and other film coolers. WOLSELEY SHEEP SHEARING MACHINE CO., Ltd., and MACNAMARA, H. J. March 12, 1948, No. 7541. ([Class 64 (iii)] [Also in Group XXII] A trough shaped tray 1 for a milk cooler is formed by pressing from a single piece of sheet metal. Some or all of the edges may be outwardly flanged as at 4. The base of a top tray 6 is formed with rows of holes or slots 7, spaced such that the milk flowing through will fall on the two sides of the cooling element, while the lower tray is formed with a single outlet opening 5.
Patent GB-1306431-A (GB)
Title: Apparatus for developing electrostatic images
IPC: G03G15/10
Filed: 1970-02-17
Abstract: 1306431 Electro-photographic developing apparatus; automatic control of concentration CANON KK 17 Feb 1970 [24 Feb 1969] 7541/70 Headings G2H and G3R In an electro-photographic developing apparatus, developer solution is pumped between a reservoir 1 and a developing tray (6), Fig. 1 (not shown); a detector 8 being positioned in the reservoir for detecting the concentration of the solution and controlling the addition of developer concentrate from a tank (10). As shown, the detector 8 comprises a photo-cell CdS 1 , which receives light direct from lamp L (optionally via a slit or filter 24), and a photo-cell CdS 2  which receives light via a quantity of developer. The photo-cells are included in a bridge circuit, Fig. 7, imbalance of which triggers a transistor oscillator which turns on a silicon controlled rectifier to actuate a valve for adding predetermined doses of concentrate.
Patent GB-1415058-A (GB)
Title: Underwater cutting and welding torch
IPC: B23K9/00
Filed: 1973-02-16
Abstract: 1415058 Electrode holders ARCAIR CO 16 Feb 1973 [1 March 1972] 7744/73 Heading H5H [Also in Division B3] In an electric underwater welding and cutting torch the electrode clamping surfaces of the electrode holder are urged towards one another by elastic means to more securely retain the electrode in the torch. The torch comprises a body 16 having a passage 18, 44 for gas flow which is controlled through valve 32, 28 by handle 38, and a head block 14 containing a check valve assembly 50 and electrode gripping members 58, 60, having clamping surfaces, held in place and, urged together by elastic ring 62. At least the upper gripping member is conductive, and is preferably of copper, and extends through the head block to form a projecting end 64 which serves as a connection to electric cable 66. This cable may be looped or lie flat against the back of the torch. The exposed surfaces of the electrode gripping members, except for contact suface 73, can be coated with insulating material. The body 16 of the torch is made of plastics. In a further embodiment, (Fig. 7, not shown) the lower electrode clamping surface has extra pressure applied to it, when an electrode is inserted, by a screw (166) acting in a nylon elastic body in which the said electrode clamping surface is formed to force it towards the upper electrode clamping surface. A filter (134) may be included in the gas passage (Fig. 10, not shown).
Patent GB-594769-A (GB)
Title: Improvements in and relating to frequency modulation receivers
IPC: H03D3/08
Filed: 1944-04-26
Abstract: 594,769. Frequency modulation. BRITISH THOMSON-HOUSTON CO., Ltd. April 26, 1944, No. 7770. Convention date, April 27, 1943. [Class 40 (v)] In order to provide steady increase and decrease of signal strength, and to reduce distortion, when tuning a frequencymodulation receiver through a desired station, a balanced discriminator is employed and each rectifier feeds the receiving instrument through a separate channel. These channels each include a valve, and bias potentials derived from the rectifier circuits operate on the valves to diminish the signal response from that rectifier which, owing to mistuning, tends to take the greater load. As shown, a discriminator network 11, 14, 15 of the phasing type feeds oppositely-poled diodes 20, 29, each of which is connected to a divided load resistance 22, 23 and 26, 27, the division points being earthed. The signal is fed from a tap 40 on resistance 22 through a condenser 42 to the grid of a valve 44 and from a tap 41 to the grid of a valve 45. The valve anodes are connected in parallel to the signal output circuit 60 and as the alternating signal voltages are in phase, their effects add in the output circuit. A bias voltage for the valve 44 is provided from the mid-point of resistances 55, 56 connected between the unearthed ends of the load resistances 23, 26 ; and bias voltage for the valve 45 from similar resistances 53, 54 connected between the unearthed ends of load resistances 22, 27. In this way, the channel which, owing to mistuning, would otherwise be operating on the hump of its discriminator curve E or E2, Fig. 3, is reduced in effectiveness, while the other channel is improved. The coupling afforded by the condenser-shunted resistance 48 in the common cathode lead of the valves 44, 45 enhances this reciprocal action. In a modification (Fig. 5, not shown), the triodes 44, 45 are replaced by oppositely-poled diodes, the signal and bias voltages being applied to their anodes and cathodes.
Patent GB-592274-A (GB)
Title: Gain-control arrangement for wave-signal receivers
IPC: G01S13/76
Filed: 1945-03-27
Abstract: 592,274. Wireless signalling; automatic gain control. HAZELTINE COR. PORATION. March 27, 1945, No. 7777. Convention date, April 19, 1944. [Class 40 (v)] A wireless receiver is arranged to have its output suppressed during predetermined intervals which are long compared with the time constant of the A.V.C. circuit, by means which also maintain the A.V.C. potential between predetermined limits during the said intervals. The invention is described in connection with a radio beacon of the kind described in Specification 592,269, adapted to transmit directionfinding information on receiving an interrogating pulse. This comprises a single transmitting and receiving aerial 46 which passes a received pulse to a super-regenerative receiving valve 60 having a quench oscillator 18, and thence to rectifier 21, pulse amplifier 40 and keying valve 43 to trigger an oscillator 30 to transmit a response pulse from aerial 46. The output from 40 is also fed to unit 50 which produces an A.V.C. potential from the quiescent noise output of receiver 10 and applies it through lead 68 to the grid of valve 10. When it is desired to use other radio equipment at substantially the same frequency it is necessary to suppress the receiver during the intervals when the other equipment is operative. This, however, allows the gain of the receiver to rise to such an extent that when the suppressor action is removed the receiver output is sufficient to trigger the transmitter even in the absence of a received pulse. This is overcome by a unit 70 which applies voltages to disable the receiver valve 10 and quench oscillator 18 and applies a third voltage to unit 50 to maintain the A.V.C. voltage within a satisfactory range of values. The suppressor signal, in the form of pulses, is applied to terminals 71, 72 of unit 70 and is fed to rectifier 74 and integrating circuit 76, 77 to give a saw-tooth waveform which is passed through valve 78 so as to provide at the anode a negative saw-tooth wave. This is applied through resistances 83, 85 to disable the receiver 10 and quench oscillator 18 and is applied through resistance 86 to the output side of A.V.C. rectifier 60 in unit 50 so as to maintain a satisfactory value of the A.V.C. potential during the blanking interval.
Patent GB-622714-A (GB)
Title: Improvements in and relating to radial flow blowers
IPC: F02C3/08
Filed: 1947-03-21
Abstract: 622,714. Centrifugal compressors; gas turbine plant. SOC. ANON. A. SAURER. March 21, 1947, No. 7785. Convention date, April 6, 1946. [Classes 110(i) and 110(iii)] A centrifugal blower in which the absolute velocity of the conveyed gas, on leaving the impeller, is at least equal to the velocity of sound, comprises a rotary diffuser wheel which rotates about the axis of the impeller at such a velocity that the velocity of the gas relative to the diffuser blades is subsonic, the diffuser wheel being driven by the conveyed gas. The diffuser wheel 6 is connected to the shaft 2 of the centrifugal impeller 3 by gearing 20, 21, 22, 23. The compressed air is delivered by way of a heat exchanger 8 to the combustion chamber 9 of a gas turbine 4 which drives the blower. The blower and gas turbine may be of multi-stage construction.
Patent GB-1091432-A (GB)
Title: Membrane separation device
Inventor: MICHAELS ALAN SHERMAN
IPC: B01D63/10
Filed: 1965-02-23
Abstract: 1,091,432. Dialysis; separating mixtures of gases. AMICON CORPORATION. Feb. 23, 1965, No. 7848/65. Headings BIB, B1L and B1X. A membrane separation device particularly of use for dialysis, or for separating components of gaseous mixtures, or for the removal of salt from sea water, consists of a membrane 10 joined at its longitudinal edges to a base strip 12 which has relief configuration in the form of longitudinal grooves on the side to which the membrane is joined and transverse grooves on the other side, the combination being spirally wound and two fluid flow paths being so formed. A longitudinal flow path is formed 'between the base strip and the attached membrane, and the other transverse path parallel to the spiral axis is formed between the other side of the membrane and the base strip of the next adjacent turn. They are wound on a hollow perforated core 20 through which fluid is introduced which passes through the longitudinal path, and the rolled cell has a layer of porous material 26 applied to it and it is placed within a cylindrical housing 24 which has an outlet 28 for the longitudinal flow path. End caps 32 (Fig. 8, not shown) provide through openings 36 for the introduction and removal of another fluid which flows along the transverse path. To separate the flow paths a layer of adhesive is applied between the back of the base strip and the member at the first turn as at 22, and between these two members at the end of the last turn as at 23, and also coatings 30 and 31 (Fig. 10, not shown) are applied about the edges of the first and last turns. The base strip is preferably of a plastic such as polyethylene, polypropylene, polyvinyl chloride, cellulose acetate, or a metal such as aluminium, stainless steel, or copper, and may itself constitute a membrane material. The separation member is a sheet material such as cellulose actetate, or polyethylene.
Patent GB-1027433-A (GB)
Title: Animated display device
Inventor: CLUTE FOSTER LYONS
IPC: G09F11/23
Filed: 1963-02-27
Abstract: 1,027,433. Rotating display devices. FRANK MAYER & ASSOCIATES Inc. Feb. 27, 1963, No. 7858/63. Heading G5C. A display sign is freely rotatably suspended from an overhead support 7 and rotated by a drive means 9, coupled to the sign by a flexible motion transmission element 10. Fig. 1 shows a sign 5 suspended by wires incorporating a swivel 16 (Fig. 2, not shown) and rotated by a motor 9, powered by a battery and mounted in a casing 23 on the floor (Fig. 4, not shown). Fig. 3 (not shown) illustrates how a pole may be inserted in coiled shank 14 to hook the device to a support 7. A number of sections may be united to form the display sign, and may revolve separately. The display may be illuminated, and the driving element 10 may be connected off-centre of the display.
Patent GB-534072-A (GB)
Title: Improved fish and like table forks
IPC: A47G21/02
Filed: 1940-05-02
Abstract: 534,072. Table forks. LEWIS. D. May 2, 1940, No. 7869. [Class 30] A fish fork is provided with an additional and pivoted prong to assist the removal of small bones. The prong has a pivoted lug b entering a slot in the fork and a fingerpress d with spring c.
Patent GB-406489-A (GB)
Title: Improvements in and relating to heating systems for internal combustion engines
IPC: F02N19/04
Filed: 1933-03-15
Abstract: 406,489. Heating oil and fuel at starting. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.- (Assignees of Randolph, C. P. ; 727, Columbian Avenue, Oak Park, Illinois, U.S.A.) March 15, 1933, No. 7874. Convention date, March 15, 1932. [Class 7 (iii).] Fuel from a float chamber 14 is supplied by a pipe 23 to an auxiliary chamber 21 where it is vaporized by a heater such as an electric heater 24 before mixing with air in a passage 15, the heater being switched off by a thermostat 28, preferably on the induction manifold, when the engine has become warm. Simultaneously, a heater 25 in the oil sump of the crank case, heats the lubricating oil until the thermostat operates to switch it off. Specification 144,767, [Class 37], is referred to.
Patent GB-1586624-A (GB)
Title: Method for the production of ammonium carbamate solution and method for the production of urea and ammonia
IPC: C07C239/00
Filed: 1978-02-28
Abstract: In a process of the so-called integrated type for the production of ammonia and urea, the absorption of CO2 from the crude gases passing to the ammonia synthesis reactor is effected by means of an absorption apparatus which is divided into two sections, one of which is of the type with adiabatic plates (6) and the other is of the type with a thin-film tube bundle (9). Most of the CO2 is removed in the thin-film absorber, and the remainder in the adiabatic plate absorber. <IMAGE>
Patent GB-598965-A (GB)
Title: Improvements in or relating to oil coolers
IPC: F28D7/00
Filed: 1945-03-29
Abstract: 598,965. Radiators for motor vehicles. STEADMAN, C. S., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. March 29, 1945, No. 8001. [Class 64 (iii)] In a honeycomb type oil cooler of the kind having header spaces disposed between the matrix and baffles 5 the header spaces are formed by substituting short blind tubes 12 plugs or the like for some or all of the fulllength semi-hexagonal D-shape, or like sectior tubular elements 11 which are normally associated with the matrix. The length of the blind tubes corresponds with the length of the expanded portion of the tubular elements 9. The tubular elements may be oriented to define either straight through or sinuous oil paths. Specifications 545,959, 555,373 and 585,159 are referred to.
Patent GB-655686-A (GB)
Title: Process of preparing benzene hexachloride
IPC: C07C17/38
Filed: 1948-03-17
Abstract: Technically pure g -isomer of benzene hexachloride is prepared by crystallization of solutions over-saturated with a , b  and g isomers, in a process in which a benzene solution saturated with a , b  and g  isomers at atmospheric temperature is boiled to evaporate part of the benzene, the boiling being interrupted before a stage is reached corresponding to saturation with isomers other than a , b and g , and the solution is then gradually cooled without undue stirring so that only the g -isomer crystallizes, which is preferably separated by filtration or continuous decantation.  The saturated solution which is the starting-material may be obtained either by treating crude benzene hexachloride with such a quantity of benzene at room temperature that a saturated solution of a , b  and g isomers is produced, from which solid a - and b -isomers are separated, or by the additive chlorination of benzene until crystals appear, when a portion of the benzene is evaporated, the solution cooled to e.g. 20 DEG  C., and the solid a - and b -isomers separated.  A crude solid benzene hexachloride may also be produced by mixing the a - and b -isomers with the mother-liquor from the final g -isomer crystallization and then evaporating all the benzene. An example is given of the process in which the initial benzene solution of isomers is obtained by chlorination of benzene. Specification 619,677 is referred to.  The Specification as open to inspection under Sect. 91 is not restricted to the use of benzene as solvent, it being stated that other known solvents may be used.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1134715-A (GB)
Title: Bisphenylalkenylamine derivatives
Inventor: MAISEY ROY FREDERICK
IPC: C07C217/62
Filed: 1966-02-24
Abstract: 1,134,715. Substituted 3,3 - diphenyl - prop- 2-enylamines. ED. GEISTLICH SOHNE AG. FœR CHEMISCHE INDUSTRIE. 9 Jan., 1967 [24 Feb., 1966; 14 Oct., 1966], Nos. 8165/66 and 46071/66. Heading C2C. Novel compounds of formula wherein R<SP>1</SP> and R<SP>2</SP> are each H, alkyl or benzyl and ring B bears one or two substituents selected from halogen, CF 3 , alkyl and alkoxy and ring A optionally is similarly substituted, and acid addition salts thereof, but excluding 3 - (4 - methoxyphenyl) - 3 - phenylprop - 2- enylamine, N,N - diethyl - 3,3 - di - (p - tolyl)- prop - 2 - enamine and N,N - dimethyl - 3 - phenyl - 3 - (trifluoromethylphenyl) - prop - 2 - enamine are prepared by dehydration of an alcohol of formula N,N - Dimethyl - 3 - (4 - chloro - or 4 - fluorophenyl) - 3 - phenyl - 3 - hydroxy - propylamine are prepared by reaction of the appropriate ketone with phenyl magnesium bromide.
Patent GB-480554-A (GB)
Title: Improvements in or relating to the casting of metals and alloys
IPC: B22D27/08
Filed: 1937-03-19
Abstract: 480,554. Resilient supports. DEUTSCHE EDELSTAHLWERKE AKT.- GES. March 19, 1937, Nos. 8182 and 8183. Convention dates, March 25, 1936 and Jan. 26, 1937. [Class 108 (iii)] [Also in Group XXII] A casting mould is arranged on a spring- supported table so that the whole forms a vibration system having a frequency within the audible range and is vibrated in or out of resonance during pouring or setting or both and, if desired, also during melting in the mould. The moulds 1, 2 are secured to a table 4 supported by rubber buffers or steel springs 5 on a counterweight 7 which rests on rubber buffers 6 or the like, the table being vibrated by a single or two coupled unbalanced members 8 rotated in opposite directions by a motor at an adjustable speed. The weight of the member 7 may be a multiple of that of the table 4 and its load. In a modification the vibrator 16, Fig. 2, is mounted on one of a pair of weights 14, 15 on a leaf spring 10 secured at 11 to the table 4 this being supported by springs 5 and counter springs 9.
Patent GB-333570-A (GB)
Title: Improvements in the manufacture and production of aqueous coating compositions
IPC: C09D101/08
Filed: 1929-03-13
Abstract: 333,570. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). March 13, 1929. Coating-compositions.-Aqueous coating-compositions are formed by emulsifying water with at least twice its volume of a cellulose lacquer which contains only constituents practically insoluble in water and in which the bulk of the solvents boil below 150‹ C. The emulsion is formed by stirring or shaking or by the use of emulsifying apparatus and the water is stated to form the disperse phase. In examples the following lacquers are emulsified with water (1) the condensation product of dimethylolurea and formaldehyde described in Specification 261,029 dissolved in isobutylalcohol, nitrocellulose solution, castor oil which has been treated with air at 140‹ C., tricresyl phosphate, coumarone resin, butyl acetate, toluene and normal butanol (2) the condensation product of urea and formaldehyde dissolved in normal butanol, nitrocellulose solution, castor oil, butyl acetate, cyclohexanone, butanol and toluene (3) nitrocellulose, ester gum from colophony and glycerol, copal, tricresyl phosphate, ethyl acetate, butyl acetate, cyclohexyl acetate, normal butanol, benzene toluene and xylene (4) nitrocellulose, castor oil, ethyl acetate, butyl acetate, cyclobrexyl acetate butanol, toluene, turpentine oil, benzene, toluene, xylene, copal, linseed oil, and cobalt resinate and (5) ethyl cellulose, tributyl phosphate, cyclohexanone and toluene. Specifications, 233,367, [Class 2 (ii), Cellulose &c.], 233,891 and 328,657 also are referred to.
Patent GB-581145-A (GB)
Title: Improved process for the production of ethyl benzene
IPC: C07C2/70
Filed: 1943-05-24
Abstract: In the production of ethyl benzene by reacting benzene and ethylene in the presence of a Friedel-Crafts' catalyst and hydrogen chloride, hydrogen chloride is recovered from the gaseous reaction products by reacting with additional ethylene in the presence of a Friedel-Crafts' catalyst to form ethyl chloride which is recycled to the main reaction.  A dilute, 25-30 per cent, ethylene feed may be used.  Benzene, ethylene and hydrogen chloride in molar ratios of 1 : 0.3-0.6 : 0.03-0.25 are fed <PICT:0581145/IV/1> by line 10 to a packed tower 12 at about 100-250 DEG , preferably 160-170 DEG  F., aluminium chloride in an amount equivalent to 1 mol. per 100 mols. of ethylene being fed through line 16.  The liquid remains in the reaction zone from 15 mins. to 2-3 hrs., the gases from 10 secs. to several mins.  The catalyst becomes liquid and is withdrawn with liquid reaction products through line 22 to a settling vessel 24, liquid catalyst being withdrawn by line 26 and returned, at least in part, while reaction products pass by line 34 to a still 36 where ethyl benzene is withdrawn through line 39 while benzene leaving as overhead is recycled with the bottoms to the tower 12.  Overhead gases from this tower containing hydrogen chloride, ethylene and inert gas are mixed with further ethylene, for example to give equimolar quantities of ethylene and hydrogen chloride, and fed to a second tower 54 also fed with aluminium chloride and at 0-150 DEG , preferably 45-55 DEG  F.  The amount of p  catalyst is maintained at about 0.5-3 per cent of the liquid present, and a solution of the catalyst in ethyl chloride is formed, and is preferably withdrawn by line 60 and recycled to the tower 12.  Alternatively, the liquid may be fed by line 74 to a still 76 where ethyl chloride is separated as overhead and recycled to tower 12 by line 86, while liquid catalyst is returned to tower 54 by line 87.