baber/WOPTO huggingface dataset:
Patent GB-395118-A (GB)
Title: Improvements in or relating to permanent magnets
IPC: H04R9/02
Filed: 1932-04-20
Abstract: 395,118. Magnets. ENGLISH STEEL CORPORATION, Ltd., Vickers Works, Sheffield, and SWAN, J. C., Moor View, Baslow Road, Totley, Derbyshire. April 20, 1932, No. 11265. [Class 35.] In a pot-type permanent magnet, particularly for moving- coil loud-speakers, having a body 4 of magnet steel supporting a central pole-piece and an outer pole-piece 12 separated by an annular gap 17, the body has an inwardly projecting ledge or ledges 8 forming a recess and the outer pole-piece is secured in an adjusted position in the ledge recess by means of a molten substance or a cement which is applied to the recess in a liquid or plastic condition. The correct position of the pole-piece 12 is determined by a non- magnetic ring 16 accurately machined to fit both the inner and outer pole-pieces, or three equidistantly spaced pins may be placed in the air gap when the parts are assembled and removed after the hardening of the cementing material. Recesses or axial or circular grooves may be formed in the outer edge of the polepieces 12 and in the adjacent wall 11 of the ledge to form keying surfaces, or the pole-piece may be bevelled and the wall 11 undercut. The internal flange 7 of the magnet is thickened opposite the wall 11 as shown at 10 to give adequate iron cross section. Specification 367,998 is referred to.
Patent GB-446786-A (GB)
Title: An improved cast-iron alloy
IPC: C22C37/00
Filed: 1935-04-12
Abstract: A cast-iron alloy contains 0,2-2 per cent of copper, 0,25-2 per cent of nickel, and 0,25-2,75 per cent of molybdenum, with or without 0,8-2,5 per cent of manganese. The carbon content may be 2,7-3,5 per cent, and there may be present also 1-2,5 per cent of silicon, up to 0,15 per cent of sulphur, and up to 1 per cent of phosphorus.  The alloy may be hardened in air or by quenching in oil or water from 780 DEG  C.
Patent GB-630719-A (GB)
Title: Improvements in or relating to loud speakers and like sound reproducing devices
IPC: H04R7/22
Filed: 1947-04-28
Abstract: 630,719. Loudspeakers. GOODMANS INDUSTRIES, Ltd., and MILLER, J. W. April 28, 1947, No. 11316. [Class 40 (iv)] The usual ring 8 of cardboard or other fibrous material which acts as an acoustic seal between a loudspeaker and a baffle is formed from a straight strip bent to shape with the cut edges abutting the baffle and the loudspeaker.
Patent GB-1186441-A (GB)
Title: Process for Stabilising Developed Photographic Images
Inventor: KOENIG ANITA VON
IPC: G03C1/35
Filed: 1967-03-10
Abstract: 1,186,441. Stabilizing developed photographic silver halide materials. AGFA-GEVAERT A.G. March 10, 1967 [March 11, 1966], No.11333/67. Heading G2C. Deterioration of the black areas of the silver image in developed photographic silver halide materials which have been stabilized instead of fixed, is prevented by incorporating into the emulsion or another layer of the photographic light-sensitive silver halide material a compound of the formula: - wherein R 1  is a 5- or 6- membered heterocyclic ring and R 2  is an optionally substituted alkoxy of up to 3C, aroxy, alkyl of up to 18C or aryl group. R 1  may be derived from an oxazole, imidazole, oxadiazole, thiadiazole, triazole, tetrazole, quinoline, pyrimidine, quinoxaline or purine nucleus. Reference has been directed by the Comptroller to Specifications 1,051,869 and 1,053,587.
Patent GB-113529-A (GB)
IPC: F02M31/18
Abstract: 113,529. Sweetser, G., and Brunner, G. E. de. March 30, 1917. Vaporizers, external.-Oil is injected into a plain tube a heated externally; the vapour or gas escapes through a valve e and meets air which has passed through the coils g surrounding the vaporizer and enclosed in a casing k. The oil may be forced from a tank by products of combustion which escape from the cylinder through a port uncovered by the piston at the end of the outstroke.
Patent GB-718146-A (GB)
Title: Improvements in or relating to progressive starting and transmission mechanisms
Inventor: COLINET PIERE
IPC: F16H3/44
Filed: 1952-05-06
Abstract: 718,146. Variable-speed gearing. ATELIERS DE CONSTRUCTIONS MECANIQUES ARMAND COLINET. May 6, 1952, No. 11463/52. Class 80 (2) Progressively-variable gearing comprises bevel planets A which mesh with bevel gears M, R and the radial spindles of which are mounted in bearings B in a pulley J to which a brake band may be progressively applied, gear M being secured to the input shaft D and gear R being connected to the output shaft D' by a rubber annulus P<SP>1</SP> secured between flanges P. the whole assembly being oil, air and dust tight.
Patent GB-142474-A (GB)
Title: Improvements in the use of thermionic devices for producing frequency harmonics of electric oscillations
IPC: H03B19/10
Filed: 1920-04-27
Abstract: 142,474. Western Electric Co., (Assignees of Vennes, H. J.). April 28, 1919, [Convention date]. Frequency, changing.-By inserting a high impedance, such as an ohmic resistance, in the plate circuit of a thermionic valve, the characteristic is changed from the type of curve shown at 1, Fig. 1. to that shown at 2, which gives greater distortion of an impressed sinusoidal wave when the valve is overloaded, with a consequent freer production of harmonics. The distortion is most marked in alternate half-cycles, and both odd and even harmonics are produced. The ohmic impedance also serves to stabilize the action of the valve. In the arrangement shown in Fig. 3, alternating current from a generator 6 is impressed through a transformer 8, 9 on an amplifying valve 10, the output circuit of which is connected to the grid circuit of a distorting-valve 20. The potential of the grid of this valve can be adjusted by a switch 20<1>. The circuit between the valves 10, 20 is bridged by a capacity-inductance loop 26, tuned to the base frequency of the generator 6, and having therefore a practically infinite impedance to this frequency but a small impedance to other frequencies, so that a substantially pure sinusoidal wave is impressed on the valve 20. The plate circuit of this valve includes an ohmic impedance 25 large compared with the internal impedance of the valve. The output circuit of the valve 20 is connected to the grid circuit of an amplifying valve 30, the connexion being bridged by an inductance 34 which has a higher impedance for the harmonics than for the base frequency, so that the former are impressed preponderatingly on the valve 30. The output circuit of this valve is connected to the work circuit through a transformer 36, 37. The filaments of the valves 10, 20, 30 are heated by a common battery 15, and their plate circuits are supplied by a common battery 17 through inductances 18, 24, 33. Blocking-condensers 19, 27, 35 prevent the passage of direct current in undesired paths.
Patent GB-276714-A (GB)
Title: Improvements in or relating to valves
IPC: F16K1/10
Filed: 1926-05-03
Abstract: 276,714. Swindin, N. May 3, 1926. Pumps for corrosive liquids; materials, special. -The invention is described with relation to valves, but is stated to be applicable to pumps or other devices having plungers moving in cylinders. To protect a valve and its spindle from the action of corrosive liquids, the valve head 25, Fig. 1, is covered with rubber or other inert material, which is extended in concertina form at 29 to enclose the spindle, being secured at 28 to the valve casing. The casing 17 and the inlet and outlet pipes are lined with like material 26. The covering is supported internally by discs 30 free to slide upon the spindle and separated by collapsable soft rubber tubes 31 or by springs. An opening 32 gives access to the valve seat for cleaning. The casing is in two parts connected by inclined flanges 14, 16, by the relative rotation of which the inlet and outlet passages, which are shown in line, can be placed at any desired angle to each other. Fig. 2 shows a modification in which the spindle carries a number of corrugated dished metal plates covered on both sides with rubber and secured together at the edges by channelled rings 38 similarly covered. The inner edges of the plates are clamped together, resilient packing 42, or equivalent springs, ensuring that the movement of the valve is distributed uniformly amongst the plates. In another form the expansible sheath is formed by moulding rubber on a screw former which has a round-sided groove turned on a tapered barrel so as to form a rounded screw thread.
Patent GB-783123-A (GB)
Title: Process for the finishing of textiles
IPC: D06M13/02
Filed: 1955-04-25
Abstract: A process for rendering cellulose-containing textile materials crease-resistant and water-repellant comprises applying simultaneously to the material an acid-reacting paraffin or wax emulsion which contains a salt or salts of one or more tri- or tetra-valent metals and a condensation product formed by reaction between a condensable organic nitrogen compound containing an amino and/or an imino group and such quantity of an aldehyde that at least 1.1 mol. of aldehyde is used for each amino- or imino-group of the nitrogen compound.  Specified organic nitrogen compounds are urea, alkyl ureas, methylene di-urea, urethane, guanidine, alkyl-guanidines, cyanamide, di-cyandiamide, dicyandiamidine, methyl-diamino-triazine, melamine, melam, melem, mellon and ammeline. Specified aldehydes are formaldehyde, acetaldehyde, glyoxal, acrolein and furfural.  Specified hydrolysable salts are aluminium acetate, aluminium formate and the corresponding zirconium salts.  Examples describe the preparation of a reaction product of urea and formaldehyde and its application to rayon fabrics simultaneously with a paraffin emulsion containing zirconium salts.  The treatment of cotton and mixed cotton-artificial silk materials is mentioned. Specification 477,841, [Group IV], is referred to.ALSO:A composition for finishing cellulose-containing textile materials comprises an acid-reacting paraffin or wax emulsion which contains a salt or salts of one or more tri- or tetra-valent metals and a condensation product formed by reaction between a condensable organic nitrogen compound containing an amino- and/or an imino-group and such quantity of an aldehyde that at least 1.1 mol. of aldehyde is used for each amino-or iminogroup of the nitrogen compound.  Specified organic nitrogen compounds are urea, alkyl ureas, methylene diurea, urethane, guanidine, alkyl-guanidines, cyanamide, dicyandiamide, dicyandiamidine, methyldiaminotriazine, melamine, melam, melem, mellon and ammeline.  Specified aldehydes are formaldehyde, acetaldehyde, glyoxal, acrolein and furfural.  Specified hydrolysable salts are aluminium acetate, aluminium formate, and the corresponding zirconium salts.  Examples describe the preparation of a reaction product of urea and formaldehyde and its application to rayon fabric simultaneously with a paraffin emulsion containing zirconium salts. Specification 477,841, [Group IV], is referred to.
Patent GB-486566-A (GB)
Title: Screw propeller for aircraft or the like
IPC: B64C11/34
Filed: 1937-04-24
Abstract: 486,566. Screw propellers. EVEREL FOREIGN CORPORATION. April 24, 1937, No. 11818. Convention date, May 6, 1936. [Class 114] A single-blade screw propeller is provided with a balancing-weight on the opposite side of the shaft and the blade itself is formed with differing areas on either side of its longitudinal axis, the whole assembly being secured pivotally on the shaft so that the blade may set itself for pitch adjustment automatically. A blade 10 has a boss member with radial enlargements 13 and is extended to form a counterweight 12. The counterweight 12 is such that the centrifugal forces thereon balance those upon the blade. The areas 15, 16 on either side of the axis 14 of the blade are of different dimensions, so that under air pressure the blade tends to set itself to increase the pitch. On the other hand the radial extensions 13 under the action of centrifugal force tend to turn the blade to lessen the pitch, the blade ultimately taking its setting under these two forces. The boss is provided with an internal longitudinal rectangular bore into which fits a block 21 carried by the driving shaft 23 and this block 21 is provided with pins 25, which pass into openings in the boss and form the pivoted support therefor. For the purpose of inserting the pins the balance weight 12 is bored and a filler block 28 provided.
Patent GB-629693-A (GB)
Title: Improvements in or relating to tunable resonant cavity circuits
IPC: E02B3/12
Filed: 1947-05-02
Abstract: 629,693. Magnetrons. WESTERN ELECTRIC CO., Inc. May 2, 1947, No. 11875. Convention date, May 13, 1946. [Class 39 (i)] [Also in Group XL (b)] A multicavity magnetron having a pair of straps each inter-connecting alternate anode segments, is tuned by varying the capacity between the straps. The prongs of a tuning member 31, Fig. 1 are movable in and out of channelled straps 28, 29 disposed in a channel 14 at one end of the anode block 11. The tuning member is mounted on a diaphragm 33 in the envelope wall 10, and fixed to a threaded stud 35 driven in or out by a train of gears 39, 41, 42 mounted in an arm 46, Fig. 3, fixed to the envelope 10. A second pair of straps 25, 26, identical with the pair 28, 29, is mounted in the channel 14 at the other end of the anode block 11. Power is taken from the magnetron by a rectangular loop 21 disposed in a recess 22 in the anode 11 and intersecting one of the cavity resonator slots. The loop 21 is connected to the coaxial line 23, 24 over a portion tapered for correct matching.
Patent GB-341805-A (GB)
IPC: H03F3/40
Filed: 1930-04-15
Abstract: 341,805. Valve amplifying circuits. ASCH, E., 22, Potsdamerstrasse, S³dende, Berlin. April 15, 1930, No. 11893. Convention date, April 16, 1929. Addition to 300,511, [Class 40 (v), Wireless signalling &c.]. [Class 40 (v).] In a cascade resistance coupled amplifier in which the anode of one stage is directly coupled to the grid of the next stage as described in the parent Specification, the anode, grid bissing and filament heating voltages are supplied by transformer windings a .. f without rectification. The Figure shows an arrangement for operating a relay r in which the phase of the controlling effect is reversed by interchanging the functions of anode and cathode in the first stage. The phases of the supply currents are as shown but if a large shunt condenser is connected across grid leak w the anodes may be alternately positive.
Patent GB-117972-A (GB)
Title: Improvements in Steam Condensers.
IPC: F28B1/02
Filed: 1917-08-21
Abstract: 117,972. Contraflo Condenser & Kinetic Air Pump Co., and Higgins, C. F. Aug. 21, 1917. Separators. --- In a surface condenser, oil and water in the exhaust steam are deposited on a ribbed plate s attached to the removable inlet cover t.
Patent GB-1422165-A (GB)
Title: Device for mixing two fluids
IPC: F16K11/20
Filed: 1973-03-13
Abstract: 1422165 Valves ARMATURENFABRIK WALLISELLEN AG 13 March 1973 [14 March 1972] 11993/73 Heading F2V A mixing valve for hot and cold water comprises a pair of inlets controlled by valve elements 10, 12 and 11, 13 respectively the elements 10, 11 being formed on a cylindrical chamber 2 which houses a pressure equalizing piston 3 co-operating with ports 19, 20 which compensates for the differing pressures of hot and cold water, the elements 12, 13 being located on the valve body 1, and the sleeve being axially displaceable by a knob 8 to control the quantity of mixed water to the outlet, whilst a knob 7 axially displaces valve member 15 to effect temperature control. The valve member (14) may be moved by means of a cam (18), (Fig. 2, not shown). The chamber 2 may be held stationary between the two knobs (Fig. 3, not shown) with the elements 12, 13 being movable relative to the valve body 1. The valve elements 10, 12 and 11, 13 may control both quantity and temperature of the mixed water (Fig. 4, not shown) in which case a compensating mechanism (21) maintains the required mixture ratio.
Patent GB-682174-A (GB)
Title: Improvements in or relating to internal combustion engines for propelling pedal bicycles
IPC: F02B75/04
Filed: 1949-05-05
Abstract: 682,174. Cylinders; spray-carburetters. TEEGEN, H., and LOHMANN-WERKE AKT.-GES. Aug. 8, 1950 [May 5, 1949], No. 12000/49. Classes 7 (ii) and 7 (iii) [Also in Group XXXI] In a pedal bicycle fitted with a self-igniting twostroke internal combustion engine having means, such as a carburetter 14, Fig. 1, for admitting fuel/air mixture to the crankcase 17, and means in the form of a cylinder liner 3 for varying the compression ratio, there is provided gearing, such as a friction, chain, belt or shaft drive for connecting the engine to the rear bicycle wheel; the moving parts of the engine within the crankcase may serve to atomize the fuel/air mixture which on its way to the combustion chamber 5 passes along the piston 12 thereby being reheated and also cooling the piston. A Bowden cable 9 around a threaded spindle 7 enables the latter to be rotated in either direction by a lever fitted on or near the handlebars of a bicycle (see also Group XXXI), in order to effect movement of the cylinder liner 3, which is prevented from rotating by a screw 11, and so cause a change in the volume of the combustion chamber 5. Fuel/air mixture from the carburetter 14 is compressed in the crankcase 17 and led by semi-circular transfer passages in the liner 3 into the combustion chamber 5, the shape of the pas; sages being such as to produce loop scavenging of the cylinder. The piston 12, which need not incorporate piston rings, has a hard skin that may be formed by a layer of chromium, for example. In a modification, the variation in the volumes of the combustion chamber 5 is effected by a cam mechanism and the engine may incorporate a fuel vaporizer or a fuel and air control valve. In the latter case the fuel which may be a mixture of low-grade petrol and lubricating oil is atomized in the crankcase by action of the moving parts therein, the crankcase having a serrated, surface to further assist the atomization. The fuel and air control valve comprises a body 33, Fig. 11, a fuel nozzle 34 and a manually-operated slide 35 which carries a needle 36 that extends centrally in an axial bore in the slide and fits within the nozzle, the latter being located in the axial bore of the slide 35 which is provided with an air inlet bore 35a so. that by moving the slide the quantity and strength of the fuel/air mixture can be regulate. The engine may have more than one cylinder but its total capacity will not usually exceed 100 cc. although the preferred embodiment has one cylinder and a capacity of less than 30 c.c. The engine preferably drives the bicycle through reduction gearing, not shown.
Patent GB-158483-A (GB)
Title: A new or improved heat exchanger
IPC: F01B31/08
Filed: 1920-04-30
Abstract: 158,483. White, W. A. April 30, 1920. Concentric straight-tube apparatus has corrugated tubes 1, 2 supported at opposite ends in separate walls 9, 10 and 3, 4 of a casing, the outer chamber 5, the annular space 8, and the inner tuba 1 each having separate inlet and discharge ports 21, 26, 19, 20, and 22, 24, respectively.
Patent GB-803136-A (GB)
Title: Improvements relating to fluid pressure governors
Inventor: PINKESS LESLIE HAYDN
IPC: G05D16/06
Filed: 1955-04-27
Abstract: 803,136. Fluid-pressure governors. EVERED & CO., Ltd. July 27, 1956 [April 27, 1955], No. 12090/55. Class 135. In a fluid pressure governor in which a valve 8 coacting with an orifice 4g in a valve body 4 is secured to a diaphragm 7 and is loaded by a spring 11 or weights the parts are so disposed that the centre of gravity of the valve mass is positioned at the centre and in the plane of the diaphragm to eliminate any couple when the governor is mounted in an inclined position. Weights may be fitted to the valve to achieve this condition.
Patent GB-260174-A (GB)
Title: Improvements in and connected with air heaters
IPC: F23M20/00
Filed: 1926-05-10
Abstract: 260,174. Babcock & Wilcox, Ltd., and Boerstra, J. May 10, 1926. Heating air.-A tubular air heater, in which air passing though the annular spaces between outer and inner tubes E, A, is heated by waste furnace gases which may pass on both sides of the annulus, is provided with regulating dampers I so that either the inner tubes only, or both the inner and outer tubes simultaneously may be heated. In the modification, Fig.4, additional dampers N control the access of gases to the inner tubes which are provided with flared ends L expanded into the tube plate C the diameter of the outer ends being such as to permit the tubes E being inserted or withdrawn through the holes in the tube plate.
Patent GB-1013469-A (GB)
Title: Frequency converters
IPC: H03F7/04
Filed: 1963-03-27
Abstract: 1,013,469. Microwave frequency changes; parametric devices. RADIO CORPORATION OF AMERICA. March 27, 1963 [April 18, 1962], No. 12142/63. Headings H3B and H3F. A parametric frequency changer comprises a conductive compartment 20, Fig. 1, divided by a conductive partition 36, 38 so as to provide cavities 40 and 42 resonant at pump and idler frequencies respectively, an iris being formed in the partition in which a variable capacitance or variable resistance diode 70 is located, the two ends of the diode 72, 76 being in respective electrical contact with the top 30 of the compartment and with a conductive holder 80 which is capacitatively coupled to the bottom 32 of the compartment through an insulating washer 86. The pump and idler circuits are coupled to their respective cavity resonators 40, 42 by waveguide flanges 54, 58 and the cavities are tuned by screws 48, 56. The signal circuit is coupled from a coaxial connector 61 across the capacitor which has appreciable reactance at the signal frequency, a link 90, Fig. 3 (not shown) being provided between the inner pin 63 of the connector and the holder 80. A tuner, e.g. for television signals, is shown in Fig. 6 in which two adjacent compartments 152, 165 are provided the resonant cavities 154, 168 being linked by an iris 164. Incoming signals in the high frequency bands are applied through a coaxial cable connector 126 to a conductive coupler 132 in a signal selecting compartment 120. The incoming signal fs is inductively coupled to a transmission line conductor 134 which is tuned by a variable capacitor 136, the signal frequency selected being applied across the capacitor of the first compartment 152 which incorporates a variable capacitance diode and functions as an up converter. Resonant cavity 122 is tuned to the pump frequency fp and cavity 154 is tuned to the idler frequency f i =f s +f p  the tuning of the idler frequency cavity being varied by adjusting the tuning screw whenever the condenser 136 is varied to select a different signal frequency band. Examples of frequency values are f s  = 500 Mc/s., f p =9000 Mc/s. and f i =9500 Mc/s. The idler frequency is transferred by iris 164 to the idler resonant cavity 168 of compartment 165. A variable resistance diode 174 is incorporated in this compartment which functions as a down converter, a local pump oscillation consisting of f p +f s +f if  being applied to resonant cavity 124. Since the idler cavity is tuned to f p +f s  the down converter applies an intermediate frequency output of f if , e.g. 45 Mc/s., to a coaxial cable connector 178. Variations of the pump oscillator frequency to the up converter will be without effect is the circuit shown in Fig. 8 is used, a local pump oscillator 192 generating a frequency f s +f if  being connected to the down converter 196 through a parametric mixer to which the pump oscillator 188 is also connected. A modified compartment is shown in Fig. 9 in which the diode is positioned in a third cavity 225 defined by two partitions 208, 210 and 200, 202 formed with irises 217, 219.