baber/WOPTO huggingface dataset:
Patent GB-630710-A (GB)
Title: Improvements in or relating to magnetrons
IPC: H01J25/587
Filed: 1947-02-20
Abstract: 630,710. Magnetrons. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Feb. 20, 1947, No. 5004. Convention date, Nov. 4, 1944. [Class 39 (i)] A cavity magnetron, of the type provided with anode straps, has means whereby the capacity or capacities between the straps may be varied in order to tune the magnetron. Fig. 3 shows part of a cross-section of a magnetron with a grid 26 surrounding one end of the cathode 14 : this is used to control the number of electrons entering the space between the anode straps 23, 23a and hence the capacity between the straps. Fig. 6 shows a magnetron with straps in the form of cylinders 32 and the capacity between them is varied by insertion of a member 34, which is preferably a dielectric but may be a conductor. Movement of 34 is controlled by a knob 39, rotation of which causes the bellows 37 to contract or expand. In a modification using two cylindrical straps, Fig. 8 (not shown), auxiliary cathodes surrounded by grids are mounted on the. anode segments between the straps. Fig. 9 shows a magnetron using two series of straps 42, each strap connecting two segments. Dielectric members 46 are provided for varying the capacity and may be mounted on a ring 47 in the end space ; the ring 47 may be rotated by a lever 48 which is connected to the outside by a suitable vacuum sealing. In a modification the dielectric members are not used and the straps 42, Fig. 11, carry filaments 51 mounted on insulators 49. The temperature of the filaments controls their electron emission and hence the capacity between the straps. The Specification as open to inspection under Sect. 91 describes a further modification, similar to that shown in Fig. 6, wherein the magnetron has only one strap at the top, the other being at the bottom, and its capacity to earth is varied by moving a metallic plunger in and out. This subject-matter does not appear in the Specification as accepted.
Patent GB-1239855-A (GB)
Title: Improvements in or relating to liquid injectors for medical respirators
Inventor: BUSHMAN J A
IPC: A61M16/16
Filed: 1969-01-30
Abstract: 1,239,855. Liquid injectors for medical respirators. PYE Ltd. 27 Nov., 1969 [30 Jan., 1969], No. 5108/69. Heading A5T. A liquid injector for a medical respirator for injecting a predetermined quantity of liquid into a stream of gas which is passed to a patient, comprises a housing, a first member having a bore therein and being movable with respect to the housing, a second member movable with respect to the first member to provide an adjustable space within the bore, and means for supplying liquid to the space such that the two members are movable to interrupt the liquid supply to the space and to connect the space to the gas stream. In an embodiment, liquid flows in a cavity 60, and a cylinder 66 is engageable with a seat 68 to enclose liquid therein. Piston 72 is movable to discharge the enclosed liquid through a valve 71 into gas flowing in pipe 20. Cylinder 66 is moved by pneumatically operated driving rod 84 acting through arms 81 and flange 66A. A piston 78 in a cylinder 76 into which compressed air may flow through port 77 to drive piston 78, is rigidly linked to piston 72 by rods 74 and 75. Adjustable member 80 determines the position of projection 80B which controls the limit of travel of piston 78 and hence the volume of liquid ejected into the gas stream. In another embodiment (Fig. 4 not shown), cylinder 76 is adjustable to vary the starting position of plunger 78 and hence plunger 72, to vary the volume of liquid enclosed in cylinder 66. Cylinder 66 is moved by means of compressed air fed through a port (97).
Patent GB-591913-A (GB)
Title: Improvements in and relating to the manufacture of crazy paving
IPC: E01C5/00
Filed: 1945-03-01
Abstract: 591,913. Crazy paving; blocks or slabs. MARLOWE, A. F. March 1, 1945, No. 5128. [Classes 87 (i) and 107] Crazy paving is formed of precast blocks or slabs of irregular shape having parts of the periphery complementary to peripheral parts of one or more other blocks so that said blocks may fit and/or interlock with each other. The blocks 1 are formed to fit together without gaps and may be laid separately, or, to facilitate laying, a number of such blocks may be interlocked and precast into a composite block, such composite blocks being arranged to interlock. The sides of a path may be formed by composite blocks 5, Fig. 1A, with a straight or curved edge on one side. Composite blocks may be formed so as to mesh with each other on either side or end. To form curved paths, or circular, oval or like areas, unitary or composite blocks of substantially triangular form may be provided. The blocks, unitary or composite, may have on their undersides one or more tongues 15 and one or more recesses 16 adapted for inter-engagement. They may also be marked and/or numbered or otherwise provided with means to effect accurate laying, and they may be provided in different colours for assembly in coloured patterns.
Patent GB-1158091-A (GB)
Title: Electrical Resistor Element
IPC: F23Q1/06
Filed: 1968-02-01
Abstract: 1,158,091. Igniting and controlling burners. DANFOSS A.S. 1 Feb., 1968 [21 Feb., 1967], No. 5153/68. Headings F4F and F4T. [Also in Divisions H1 and H5] A resistor having a negative temperature coefficient of resistance comprises SiC granules bonded by Si 3 N 4 . The Si 3 N 4  may be present on its own or may be combined with silicon oxynitride. The resistor is preferably in the form of a thin U-shaped body and may be used as an incandescent flame igniter or a flame sensor. In the former application the resistor is placed in a fuel stream while an alternating current is passed through it to produce incandescence. In the latter application the resistor is maintained in a flame, the change in resistance when the flame is extinguished causing the current flowing to be insufficient to retain open a magnetic valve 12 which closes the fuel supply, the valve being controlled also by a switch 15 or opened manually by means of a member 17.
Patent GB-818732-A (GB)
Title: Improvements in apparatus for the measurement of dissolved oxygen
Inventor: JESSOP GILBERT
IPC: G01N27/49
Filed: 1957-02-15
Abstract: In apparatus for testing liquids, e.g. boiler feed water, for oxygen, by scrubbing the liquid with an inert gas which takes up the oxygen, and then estimating the oxygen content in an electrolytic cell, the cell comprises an anode of a chemically inert material, e.g. a palladium or a platinum wire coated with platinum black and the electrolyte is saturated with hydrogen, the hydrogen ion concentration of which may be <PICT:0818732/III/1> adjusted.  The cathode is normally polarized and becomes partially depolarized in the presence of oxygen, which is measured by the resulting current, the anode being at constant potential.  The liquid to be tested flows into a scrubber 1 to which hydrogen is admitted through a tube 3 from an electrolytic hydrogen cell 14. The gases pass through a liquid-arrester 6, having a cooling jacket 8, and provided with porcelain beads or close-fitting rings 7, which break up any spray or bubbles of liquid.  The gases then flow through the electrolytic cell unit 5, which is provided with the platinum anode 19 and cathode 18 connected through an external circuit.  If, due to impurities in the electrolyte, the anode potential falls below normal value, a heavy current is passed through the cell for a few minutes, preferably using a third electrode, causing oxygen to be liberated at the anode. The zero reading of the apparatus may be checked, by passing the gases before admission to the electrolytic cell, through a chamber 9 containing a palladimized asbestos element, whereby any oxygen present combines with hydrogen, to give an oxygen-free gas.  A second liquid-arrester 12 may be mounted in the exit tube from electrolytic cell.
Patent GB-680526-A (GB)
Title: Improvements in the preparation of photographic emulsions
IPC: G03C1/015
Filed: 1949-02-25
Abstract: 680,526. Photographic emulsions. KODAK, Ltd. (Eastman Kodak Co., Hill, G. D., and Damschroder, R. E.). May 25, 1950 [Feb. 25, 1949], No. 5258/49. Class 98 (ii). A photographic silver halide emulsion is prepared by a method which includes the steps of reacting a silver salt dissolved in ammonia or' lower aliphatic amine solution with a watersoluble alkali metal, ammonium, or alkylammonium halide to form silver halide and a volatile nitrogeneous product, and removing nitrogeneous compounds from the reaction mixture by vaporization until the molecular equivalent amount of nitrogen compound remaining in the emulsion is not greater than 22 grams of ammonia per kilogram of silver used when expressed as silver nitrate. The reaction may be performed in the presence of a peptizing colloid, e.g. gelatin, polyacylamide or imidizedpolyacrylamide resin as described in Specification 646,712, or oxidized protein (e.g. casein) derivatives as described in Specification 648,927. The silver compound may be the nitrate, carbonate, citrate, tartrate, acetate, or sulphate. The alkyl-ammonium halide may have the formula RR 1 R 2 R 3 NX, wherein X is a halogen atom and R-R 3  are each hydrogen atoms or alkyl groups of not more than 4 carbon atoms, the total number of carbon atoms in the R groups being not greater than 4. The nitrogeneous product may be removed by vacuum distillation or by passing a strong current of air over the reaction mixture, or in the case of an alkyl-ammonium halide, washing after previous evacuation may be necessary. In example 1, ammoniacal silver nitrate solution is added to an aqueous solution of potassium bromide containing gelatin, and the resulting mixture is passed through a vacuum system to remove excess (but not all) ammonia. Gelatin, other protein, hydrolysed cellulose ester, or polyvinyl alcohol may be added as the emulsion binder. In example 2, silver nitrate solution containing methylamine is added to aqueous potassium bromide and iodide solution containing gelatin, and after removal of methylamine by vacuum treatment, the emulsion is finished in the normal manner.
Patent GB-209324-A (GB)
Title: Improvements in manhole and like covers and frames therefor
IPC: E02D29/14
Filed: 1923-02-23
Abstract: 209,324. Blakeborough, J. E., and Marshall, R. W. Feb. 23, 1923. Manhole covers.-To prevent rocking, the inner flange a<2> of the frame is inclined outwardly and downwardly to form a seat for a correspondingly inclined rim b<1> on the base of the cover b. The rim b<1> projects beyond its seat into a. sealing groove. a<3>.
Patent GB-813806-A (GB)
Title: Improvements relating to film-feeding mechanism for optical projectors
Inventor: BRAMPTON NOEL ARTHUR
IPC: G03B1/22
Filed: 1956-02-21
Abstract: 813,806. Optical-projection apparatus. VISUAL COMMUNICATIONS Ltd. Feb. 21, 1957 [Feb. 21, 1956], No. 5337/56. Class 97(1) A film feeding mechanism comprises a film feeding member coupled, when required, to a continuously driven member by an electromagnetically operated helical spring clutch. In the form shown, Fig. 2, pully, not shown, carried on a fixed axle 2 is continuously driven by a motor which also drives a cooling fan. A helical spring 6, carried on the pulley hub, is a anchored at one end to the hub and, at its other end, encircles the hub 8 of a disc 9 on the same shaft. An arm 12, pivoted at 13 is urged upwards against a stop 14 by a spring 15 but may be pulled down by a solenoid 10 and a link 11. The lever has a notch 23 and a deeper slot 24. Another arm 16, also pivoted at 13, is guided by a downwardly projecting finger 28 engaging a groove 29 in the hub 8. A finger 18 is pivoted at 19 to the upper part of the arm 16 and urged counter-clockwise by a spring 20 to engage a projecting lug 21 in the notch 23 to provide a coupling with the arm 12. Thus when the solenoid is energized the arm 16 is also pulled down against a spring 17, to engage the flanged portion 27 thereof with the helical spring on the hub 8 and so provide a drive to the disc 9. Movement of the arm 16 closes a switch 40 which maintains the solenoid energization after the initial pulse has ceased. When the disc 9 has completed one revolution a pin 33 strikes the lower extremity 26 of the finger 18 to remove the lug 21 from the notch 23 into the notch 24 to permit the arm 16 to return upwardly and release the clutch even if the solenoid should still be energized. If or when the arm 12 moves upwardly the finger is reset to its original position by the spring 20 in readiness for a fresh cycle. At each rotation of the disc 9 a pin 30 engages a Maltese cross 32 to rotate a film feed sprocket 90 degrees. Additional holes 30<SP>1</SP> in the disc may accommodate one or more additional pins if a greater feed movement is required. The sprocket is secured to its shaft by a knurled knob and so is adjustable for initial framing. In the form shown in Fig. 10 the clutch operating flange 27<SP>2</SP> is carried directly on the arm 12<SP>2</SP> operated by the solenoid 10. A switch 45 is closed during the rotation of the disc 9 except when the roller 46 is engaged in the notch 47. An initiating pulse closes a relay to discharge a condenser through the solenoid which is then held energized by the switch 45 until the disc 9 has completed one revolution. Specifications 640,645 and 704,169 are referred to.
Patent GB-1069611-A (GB)
Title: Alarm device for controlled quantities
IPC: G08B3/10
Filed: 1965-02-08
Abstract: 1,069,611. Electric selective signalling; playing recorded alarms. TOKYO KEIKI SEIZOSHO KABUSHIKI KAISHA. Feb. 8, 1965 [Feb. 12, 1964], No. 5338/65. Headings G4H and G5R. Apparatus for providing audible alarm signals comprises contacts (a, Fig. 1, not shown) producing signals when corresponding quantities (A1-An) depart from given limits to pick up relays in stores (M1-Mn), an instructor circuit (T) being controlled by contacts (CO) of the relays to cause stepping of a switch to select one of a number of sources (B1-Bn) of recorded information so that a loud-speaker (SP) gives the nature of the trouble and instructions to deal with it. When one of the relay stores (M1-Mn) operates, a signal is passed through a corresponding diode (D1-Dn) to switch on an amplifier (AM1) and energize a stepping coil (L3) of ganged switches (SW1- SW3). The wiper (f10) steps round until it finds the terminal (f11-f1n) having a signal. Amplifier (AM2) is then switched on to switch amplifier (AM1) off and stop the stepping. Relay (L2) is energized by amplifier (AM2) to close contacts (do, eo) applying power to speaker amplifier (AM3) and tape drive motor (M7). Wiper (f20) selects the corresponding memory circuit preparatory to resetting, and wiper (f30) selects the appropriate tape read head (H1-Hn) connecting the signal to the amplifier (AM3). The appropriate message is then given by the loud-speaker and, being on an endless tape, it repeats until the operator presses a reset key (K). At the next message end contacts (go and ho) then close so that current is applied via wiper (f20) to the selected memory (M1-Mn) which is thereby reset. The motor then stops and the message ceases.
Patent GB-1069474-A (GB)
Title: Improvements in or relating to covers for car seats
IPC: B60N2/60
Filed: 1965-02-08
Abstract: 1,069,474. Loose covers for seats. RONYLEVOI Ltd. and S. A. BLOXHAM. Feb. 8, 1966 [Feb. 8, 1965], No. 5411/65. Heading A4M. A one-piece loose cover, for completely covering a seat with a back rest, is formed from a plurality of panels secured together at their edges, the lowermost edges of the panels having stitched thereto a closed ring (19) of elastic material which is stretched as the cover is passed downwardly over the seat and finally contracts to draw the lowermost panel edges beneath the seat, and the closed ring being formed from a single strip folded to a U-section around the lowermost panel edges and having its ends secured together. The strip may be of plastics or rubber. The cover may include a portion for tucking-in between the seat and back rest.
Patent GB-790779-A (GB)
Title: Improvements in or relating to knitted footwear
Inventor: SYMES ERNEST
IPC: A41B11/12
Filed: 1955-02-23
Abstract: 790,779. Knitting. BOOTH & SONS, Ltd., A. March 26, 1956 [Feb. 23, 1955; April 30, 1955], Nos. 5437/55 and 12606/55. Class 74 (2). [Also in Group VII] The main yarn forming the upper end (e.g. the welt) of a ladies' fully-fashioned stocking is reinforced in one or more suspender-attachment bands at a location or locations appropriate to the attachment of the suspender, by knitting an additional yarn with the main yarn at spaced courses, e.g. at every third course. The reinforced area may be a panel or panels which may, as at 17, Fig. 1, stretch from the picot edge 11 to the welt bottom 12 and be formed in one or both plies, or may, as at 20, Fig. 2, be spaced therefrom ; or it may be a similarly spaced circumferential band 31, Fig. 3, In the constructions of Figs. 2 and 3, the reinforced part is contracted somewhat, to produce a frilled effect at 21 and 22, or 34 and 35, by using as the reinforcing yarn a stretch yarn fed in extended condition or a relatively inextensible yarn fed in a relatively high tension; and the inner ply of the turned welt has a reinforced area coincident with that of the outer ply. Friction may be provided by use of, say, cotton or bulked synthetic yarn as the reinforcing yarn; and that yarn may contrast in appearance (e.g. in colour or shade) with the main yarn, to render the area readily visible. An after-welt 14 incorporating picot stitches 15, or an after-welt 25 incorporating a single row of picot stitches 29, may be provided.
Patent GB-452377-A (GB)
Title: Improvements in carburettors for internal combustion engines
IPC: F02M29/06
Filed: 1935-02-20
Abstract: 452,377. Spray carburetters. ARNOLD, R., 6, Schloss-Strasse, Dresden, Germany. Feb. 20, 1935, No. 5464. Convention date, March 10, 1934. [Class 7 (iii)] In a downdraught carburetter, a member 19 disposed in the air passage to divide the stream into several passages, is formed with curved inlet and outlet surfaces and provides concentric passages 20, 21, the air flowing through the outer one impinging on the curved top surface 23 of a Venturi 22 which deflects it on to the fuel nozzle 4. The member 19 is adjustable in the air passage and may itself be formed to deflect the outer air currents inwards. A cam 16 on the air inlet valve spindle controls a fuel valve 12.
Patent GB-1128332-A (GB)
Title: Improvements in or relating to cable or rope clamps
Inventor: WHITTAKER WILLIAM
IPC: F16G11/02
Filed: 1965-02-09
Abstract: 1.128,332. Rope couplings; eyes. CABLE COVERS Ltd. 4 Feb., 1966 [9 Feb., 1965; 10 July. 1965; 6 Nov., 1965], Nos. 5495/65; 29342/65 and 47144/65. Heading D1T. A cable or rope clamp of substantially elliptical cross-sectional shape has a wall thickness that varies uniformly from a maximum at the minor axis to a minimum at the major axis in accordance with the formula:- where t=wall thickness of the sleeve in millimetres on the major axis; and D=wire or cable diameter in millimetres. As illustrated in Fig. 1 (not shown) the minimum thickness is t and the maximum thickness is T. There is an initial clearance c between the two cable lengths and the clamp. In Fig. 1 the internal bore is substantially elliptical and in Fig. 11 (not shown) the internal bore is of figure-eight shape. The clamp may have:-(a) a notch or notches in either or both ends; (to) one or more radial inspection holes; (c) flattened portions on the sides parallel to the major axis; and (d) either or both ends externally chamfered or rounded. If the cable or rope is doubled back on itself to form an eye, one end of the rope may terminate at the clamp end remote from the eye and the clamp deformed so as to extend beyond said end and so permit the clamp to be more readily deformed to a conical shape at said end. Both ends of the clamp may be deformed to conical shape. It is stated that the dimensions of the clamp are such that it may be made of steel or other high strength material since very little work hardening takes place when compressing the clamp onto the rope or cable.
Patent GB-1035242-A (GB)
Title: Improvements in fuel blocks
IPC: C06B27/00
Filed: 1963-02-11
Abstract: A rocket fuel block consists of (a) a cellular matrix composed of at least one polyamide fuel solid at 20-25 DEG  C. and (b) a nitrogencontaining base non-gaseous at 20-25 DEG  C. filling the cells, (a) and (b) being miscible at elevated temperatures, but not at 20-25 DEG  C. The block may contain 10-30% polyamide, 70-90% nitrogen material in component (b) and 10-30% additional material. Polyamides specified are condensates of hexamethylene diamine with adipic acid and sebacic acid and copolymers of these with e -aminocaproic acid. Component (b) may be liquid, viscous, gel or solid and may be an amine, e.g. o-, m- or p-toluidine, assym.-orthoxylidine, o-, m- or p-phenylene diamine, p-anisidine, pyridine, 2-aminopyridine, m-tolylene diamine, diethylene triamine, or phenyl hydrazine.  The latter may contain up to 0.5% water.  A plasticizer, e.g. glycerol, may be added to provide a surface coating.  Other additives may be Al, Zr, Mg, Be or Li powder, LiNH2, LiH, and thickening agents, e.g. isocyanates, with or without hexamethylene diamine, urea or benzoguanamine.ALSO:A fuel block consists of (a) a cellular matrix composed of at least one polyamide fuel solid at 20-25 DEG  C. and (b) a nitrogen base, non-gaseous at 20-25 DEG  C. filling the cells (a) and (b) being miscible at elevated temperature but not at 20-25 DEG  C.  The block may contain 10-30% polyamide, 70-90% nitrogen containing material in component (b) and 10-30% additional materials.  The block may be made by mixing the reactants at 140-200 DEG  C. and allowing them to cool in a mould.  The two major components may be mixed first and other material added later.  Polyamides specified are condensates of hexamethylene diamine with adipic acid and sebacic acid and copolymers of these with e -aminocaproic acid. Component (b) may be liquid, viscous, gel or solid and may be an amine, e.g. o-, m- or p-toluidine, asymmetric orthoxylidine, o-, m- or p-phenylene diamine, p-anisidine, pyridine, 2-aminopyridine, m-toluene diamine, diethylene triamine or phenyl hydrazine.  The latter may contain up to 0.5% water.  A plasticizer, e.g. glycerol may be added.  Cellulose acetate may be added to provide a surface coating.  Other additives may be Al, Zr, Mg, Be or Li powder, LiNH2, LiH and thickening agents, e.g. isocyanates with or without hexamethylene diamine, urea or benzoguanamine.