baber/WOPTO huggingface dataset:
Patent GB-680610-A (GB)
Title: Improvements in and relating to the production of silica-alumina cracking catalyst
IPC: C10G11/04
Filed: 1951-07-20
Abstract: A silica-alumina cracking catalyst is prepared by producing under acid conditions a concentrated silica sol containing at least 85 grams SiO2 per litre and having a final pH between 2.8 and 4.1, aging the sol for a time which is at least 0.5 but less than 1 times the time of set of the sol, preventing the sol setting to a gel by diluting it with water at a rate so as to maintain the viscosity constant, increasing the pH to 7 by the addition of an alkali while preventing setting of the sol, adding a concentrated solution of an aluminium salt (such as a 1 molar solution of the sulphate) to provide between 18 per cent and 30 per cent Al2O3 in the finished catalyst, hydrolysing the aluminium salt by the addition of a basic precipitant and washing and drying the product.  The above procedure is applicable at 20 DEG C. and deviations from this temperature may be adjusted by heating or refrigeration.  The initial silica sol preferably contains 90 to 125 grams of silica per litre and may be prepared by adding sodium silicate to an acid while mixing or simultaneously adding the silicate solution and an acid to an acid medium, the final pH being adjusted to between 2.8 and 4.1 by the addition of an alkali such as sodium silicate.  The dilution of the sol with water is delayed until the sol has almost gelled, and may continue for 30 minutes to 2.5 hours, after which the pH is reduced to 6.0 to 7.0 when a further aging period may ensue. After the addition of the aluminium salt, and the hydrolysis, the sodium salts are removed by water washing optionally followed by washing with dilute hydrochloric, hydrofluoric or acetic acids. Alternatively aluminium chloride, sulphate or nitrate or ammonium chloride, sulphate or nitrate or acetate solutions may be employed.  Drying may be effected by passing the material in a thin layer through an oven at 80 DEG -130 DEG C. in a stream of air or alternatively the slurry may be passed through a colloid mill and spray dried to form microspheres which may be further calcined.
Patent GB-182774-A (GB)
Title: Improvements in or relating to wind motors
IPC: F03D3/06
Filed: 1922-06-22
Abstract: 182,774. Chenoweth, W. B. July 5, 1921, [Convention date]. Current motors; regulating.-A wind-motor comprises a vertical shaft 11 carrying upper and lower radial arms 16, 15, between which the pivoted vanes 17 are mounted, the vanes being feathered as they rotate by a chain and sprocket gear 49, 22, which gives the vanes half a revolution for each revolution of the motor. The chain 49 passes round the wheels 22 and also round a sprocket 50 gearing with a wheel 48 fixed to a sleeve 37, so that when this sleeve is rotatably adjusted by the speed governor 70, the vanes are turned more or less into the wind. The governor acts on the pivoted rudder vane 55 through a cable 58, thereby shifting the arm 38 and the sleeve 37. With excessive wind a plate- 39 swings inwardly and forces downwards a disc 36, thereby depressing levers 34 and releasing members clutching the vanes 17 to their sprocket wheels 22, the vanes being thus put out of action. In a modification the speed governor is replaced by a wind-operated plate pivoted on the arm 38 and actuating the rudder vane 55.
Patent GB-348420-A (GB)
Title: Improvements in or relating to the manufacture of resinous condensation products
IPC: C08G16/02
Filed: 1930-06-04
Abstract: Coating compositions are manufactured from partially polymerized condensation products of ammonium thiocyanate and formaldehyde, together with cellulose nitrate, using acetone as a mutual solvent. The condensation products, with or without preliminary polymerization, may also be employed in coating compositions containing other cellulose derivatives, such as cellulose esters, e.g. the acetate, or ethers.  Oils, other resins, solvents, driers and pigments may also be incorporated in these compositions.ALSO:Resinous condensation products are manufactured by heating together ammonium thiocyanate and formaldehyde in an acid, neutral or alkaline medium, followed by the removal of water by evaporation, the products if desired being subsequently hardened to any desired degree by heat.  In examples, a mixture of ammonium thiocyanate and formaldehyde solution is refluxed, either alone or with the addition of hydrochloric acid, sodium hydroxide or ammonia, the water is removed by evaporation, and the product is further heated to produce an insoluble polymerized product.  The partially polymerized products may be employed with nitrocellulose in coating compositions, acetone being employed as a mutual solvent, or the products, with or without preliminary p  polymerization, may be used in coating compositions containing other cellulose derivatives, such as cellulose esters, e.g. the acetate, or ethers.  Oils, other resins, solvents, driers and pigments may also be incorporated in these compositions.  The Specification as open to inspection under Sect. 91 (3) (a) comprises also the replacement of the formaldehyde by a substance generating it, such as hexamethylenetetramine.  This subject-matter does not appear in the Specification as accepted.
Patent GB-489805-A (GB)
Title: Improvements in trolley carriers
IPC: B60L5/16
Filed: 1937-06-21
Abstract: 489,805. Current collectors for electric vehicles. DELACHAUX, C. L. June 21, 1937, No. 17283. [Class 104 (iii)] Means for releasing and re-engaging trolley poles after dewirement comprises a collar 7 sliding on the pole 5 and connected by means of a spindle 8 to the lifting springs 6. Pivoted on a spindle 10 on the collar 7 is a catch 11 adapted to engage a lug 13 on a fixed collar 12 on the pole. If the pole is dewired, the collar 7 moves towards collar 12, and the catch is disengaged from the lug 13 and is tilted upwards by a spring 14. The pole being released from the springs 6 descends until a brake block 18 connected by rods 15 to the collar 7 engages the base 19. A telescopic tube 9 connects the spindles 4 and 8, the inner sliding part being integral with the collar 7. When the brake shoe arrests the descent of the pole, the collar 7 slides thereon, and a rack 21 on the tube 9 moves away from the collar, and a pivoted catch 30 held off the rack by a rod 22 abutting on collar 12, engages the rack when the collars 7, 12 move apart.
Patent GB-568463-A (GB)
Title: Improvements in or relating to oscillation-generator apparatus for induction heating
IPC: H05B6/04
Filed: 1943-10-20
Abstract: 568,463. Valve generating circuits. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Oct. 20, 1943, No. 17294. Convention date, Nov. 5, 1942. [Class 40 (v)] Relates to an oscillation genera. tor for inductive heating apparatus, particularly applic. able to the flowing or fusion of tin plate for the continuous treatment of long strips running at high speed in which the strip is passed through an electrolytic plating bath and coated with tin and the coating of tin is fused by inductive heating. In this arrangement the inductive heating coil provides a load which varies both in amount and inductance so that the frequency varies. The generator comprises a valve oscillator with a magnetizable core output transformer 11 which may be an auto-transformer and energy feed-back taken from the output is applied to input. to maintain oscillation. The primary winding of the output transformer supplies the power to the oscillator valves while the inductive heating coil load is included in the secondary winding. The tank circuit is serially included in the output circuit with one of the transformers windings so that the frequency varies with the load-condition of the workcoil. As shown, the feed-back transformer 25 is included in the secondary of the output transformer 11 and feeds the magnetizable core transformer 19 connected to the input. Alternatively, the tank circuit capacitor 16 may be arranged in the primary circuit of the transformer instead of in the secondary. For the high power necessary, water-cooled conductors, transmission lines and coils, as well as valves, may be used. Voltage control may be provided, as shown, by an induction regulator 32 to vary the supply to the rectifier transformer 33, to enable the heating to be adjusted. The star points of the secondary windings 35, 36 of the transformer 33 may be joined by an interphase transformer 37.
Patent GB-700480-A (GB)
Title: Improvements in stands
IPC: F16M11/26
Filed: 1951-07-24
Abstract: 700,480. Stands. SORENSEN, M. July 24, 1951, No. 17488/51. Class 52(3) In a telescopic tubular stand 1, 2 having an internal axially displaceable rod 4, carried by the adjustable tube 2 and fitted with a rubber or like sleeve 6 radially distorted to jamb the tubes by a concentric spring 9, the release mechanism consists of a lever 13 with a cam head 12 movable in a vertical slot or slots in the tube 2 and having an upwardly facing notch forming a fulcrum 14 on the slot edge.
Patent GB-805798-A (GB)
Title: Envelope
IPC: B65D27/14
Filed: 1956-06-06
Abstract: 805,798. Envelopes. BARCA, P. May 22, 1957 [June 6, 1956], No. 17506/56. Class 146(2) An envelope machine closure arrangement which can be made without sealing the envelope comprises a flap 2 to which is made to adhere to a withdrawable sheet 4. The sheet 4 is a little smaller than the envelope and may contain printed matter, may have a detachable portion, contain a turned up portion for easy withdrawal, or may be an adhesive label. The envelope may be closed by moistening a part of the sheet '4 which shows at the flap opening 6 or by moistening adhesive 3 provided on the flap 2 at a position which contacts the sheet 4 and not the envelope 1. In a modification, the flap 2 may be of the same size as the opening 6 in which case the adhesive is close to the edges of the flap 2. The edges of the flap may be wavy so that only parts of the flap overlap the envelope, and in a further modification, the flap is trapezoidal and overlaps an opening which is narrower.
Patent GB-530628-A (GB)
Title: Improvements relating to speed control systems for direct current electric motors
IPC: H02P7/06
Filed: 1939-06-15
Abstract: 530,628. Control of D.C. motors. WESTING- HOUSE BRAKE & SIGNAL CO., Ltd., and STEVENS,' S. A. June 15, 1939, No. 17528. [Class 38 (iii)] Varying E.M.F. field control. A transformer 4 supplied from an A.C. source RS, is provided with several independent secondary windings 6-11 each connected to a separate rectifier 12-17 and the armature or field of a motor 1 is supplied through a control switch from a regulatable number of the rectifiers connected in series. Where the armature is so supplied a field regulator 25 may give fine adjustment of speed. and the rectifiers 16, 17 operable at low speed may be of higher capacity than the remainder.
Patent GB-190506-A (GB)
Title: Improvements in or relating to the supporting planes of aeroplanes
IPC: B64C23/06
Filed: 1921-06-28
Abstract: 190,506. Barker, J. C. June 28, 1921. Planes, construction of.-A series of ridges 5 on the underside of a plane 1 extends from the trailing edge 3 towards, but not so far as, the leading edge 2. They may decrease in size the further they are from the longitudinal axis of the aeroplane, and may be arranged singly or in sets. They may be of triangular cross-section, as shown, and be tapered at front or rear.
Patent GB-654123-A (GB)
Title: Microtome
IPC: G01N1/06
Filed: 1948-06-30
Abstract: 654,123. Microtomes. REICHERT, C., (trading as OPTISCHE WERKE C. REICHERT). June 30, 1948, No. 17645. Convention date, July 9, 1947. [Class 97 (i)] In a microtome in which the preparation carrier is moved in a circular path past the cutting edge, the carrier is given a rotation about its own axis equal and opposite to that in the path so that the orientation of the carrier as it passes the cutter is constant. Alternatively the cutting edge may be moved in this fashion past a stationary preparation carrier. As shown, the carrier 5 is mounted on a shaft rotatable on a disc 4 which may be revolved by a crank 3 to move the preparation 6 past a cutter 7. A gear 13 is fixed to the casing and a similar gear 14 is fixed to the carrier shaft, the gears being connected by a chain 12 or by a third gear. These gears cause the carrier 5 to be rotated in the opposite direction to the rotation of the disc 4 to maintain the orientation of the carrier 5. In a modification a ring is mounted eccentrically of the shaft of the disc 4 and is pivotally connected to this disc by three cranks on the shaft of one of which is the preparation carrier which is thereby maintained in a constant orientation. The carriage 8 supporting the cutter 7 is moved forward on a slide 9 during the non-cutting period by a screw 11 operated by gears 10 from the crank 3.
Patent GB-808080-A (GB)
Title: Improvements in or relating to signal receiving circuit arrangements for printing telegraph receivers
IPC: H04L25/24
Filed: 1956-06-07
Abstract: 808,080. Code telegraphy. CUPELLA, A., and SOC. METALLOTECNICA. June 7, 1956 [June 10, 1955], No. 17660/56. Class 40 (3). A signal receiving arrangement arranged to effect correction of the received signal pulses, and including a relay to repeat the pulses for the operation of a teleprinter, is provided with adjustable means including the relay for regulating the mark-space ratio of the pulses and means for detecting and indicating the said pulse ratio to aid the adjustment of the regulating means to obtain a desired mark-space ratio. When a pulse, e.g. a mark, is received, the valve 1 conducts and passes a positive pulse to make valves 9, 10 conducting. Normally, a valve 13 is non-conducting with an associated valve 14 conducting and the networks 11, 12 are arranged so that when the valves 9, 10 conduct, the valve 13 conducts and the valve 14 becomes non-conducting, thus reversing the current flow through the main winding 15 of relay 16. The current through the biasing windings 17, 18 of relay 16 can be varied by an adjustable tap on a potentiometer 19. With the armature of relay 16 in its central position, valves 20, 21 are non-conducting, but its movement to one or the other of the outer contacts makes one of the valves 20, 21 conducting and via capacitor 22 ensures the cut-off of the other so that the current through the winding 23 of the teleprinter receiving relay is reversed in accordance with the marks and spaces respec. tively of the received signals. An arrangement for indicating the relative lengths of the marks and spaces operating relay 23 comprises a disc 27 carrying fluorescent lamps 28, 29 connected to the cathode circuits of the valves 20, 21. The lamps 28, 29 are circumferentially separated by one-seventh of 360 degrees, and are radially spaced. The disc 27 is driven at the speed of the reception of characters by a synchronous motor 26 fed by amplified pulses from an oscillator 24. When the mark/space ratio is correct, the circumferential illuminated portions of the inner and outer rings will be approximately equal for alternations of equal numbers of marks and spaces, as indicated by S30, and if the lamps 28, 29 correspond to mark and spaces respectively, the illuminated portions in the outer or inner rings will be unduly lengthened for mark/space ratios respectively considerably greater than, or less than, unity, as indicated by the representations S31, S32. The alteration of the mark/space ratio to a desired value is effected by adjustment of the tapping-point on the potentiometer 19.
Patent GB-237246-A (GB)
Title: Improvements in stroke limiting devices for metal cutting and like machine tools
IPC: B23Q16/00
Filed: 1925-07-10
Abstract: 237,246. M³hlschlegel, K. July 21, 1924, [Convention date]. Gauging-devices ; feed motions, tool.-In machine-tools wherein the tool is automatically fed forward until arrested by a stop, the contacting surfaces of the stop are arranged remote from the so that cuttings &c. cannot intervene. A plunger i freely mounted in the tool-slide c is maintained in contact with a fixed stop h by a spring k which also serves to return the slide after it has been advanced by a cam d, and a screw o, locked by a nut p, engages the plunger to limit the feed. The contacting surface, of the stop may be flattened or countersunk to aid in excluding cuttings &c.
Patent GB-182469-A (GB)
Title: Improved apparatus for applying curative treatment with a radioactive substance
IPC: G21G4/06
Filed: 1922-06-27
Abstract: 182,469. Muguet, A. June 29, 1921, [Convention date]. Radiations, treating diseases with. -An appliance for containing and applying radio-active material consists of a casing B having a separable stopper C which may be sharp or rounded, and one or more small metal tubes A in which the material is enclosed. The end of the casing may have an aperture D for a thread or it mav have flats to facilitate holding by means of forceps &c.
Patent GB-595957-A (GB)
Title: Improvements in or relating to centrifugal pumps provided with diffusers
IPC: F04D29/44
Filed: 1945-07-11
Abstract: 595,957. Centrifugal &c. fans &c. HAYWARD-TYLER & CO., Ltd., HOWARD, G. P. E., and IVANOFF, A. July 11, 1945, No. 17700. [Class 110 (i)] To enable smaller radial clearances to be obtained between the impeller and diffuser of a centrifugal pump without risk of seizing, the diffuser comprising discs 11, 15 and vanes 13 is assembled on the hub 14 of the impeller and is located axially by the discharge pressure forcing it against the pump casing at 16, rotary movement of the diffuser being prevented by a pin 19 projecting from the pump casing. Specification 595,956 is referred to.
Patent GB-425970-A (GB)
Title: Improvements in and relating to protection means for grid-controlled machine plant
IPC: H02H3/02
Filed: 1933-06-21
Abstract: 425,970. Protective cut-out arrangements. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.-(Assignees of Allgemeine Elektricitõts-Ges.; 2, Friedrich Karl-Ufer, Berlin) June 21, 1933, No. 17704. Void [Abridged as open to inspection under Sect. 91 of the Acts, Dec. 22, 1933]. [Class 38 (v)] In the protection of plant containing gridcontrolled rectifiers or inverters, usually associated with a transformer, fuses are arranged in the circuit of the plant for interrupting the circuit on overload and are additionally arranged so as to be ruptured through the actuation of a protective relay. Thus, failure of the grid control means can be compensated for, and internal faults in the plant, which might not be strong enough to rupture the fuse, nor to operate an overload circuit-breaker, can be disconnected. The fuse may be used as an isolator and withdrawn electromagnetically from its contacts, or it may be severed by an electromagnetically-actuated cutter. Preferably, however, a coil e is arranged with its axis inclined and co-operates with a closed coil f surrounding the fuse wire d. The protective relay serves to feed the coil e from an A.C. source, the coil f, preferably of one turn, acting as a secondary to e and fusing the wire d by local heating effects. The wire d is of silver and mounted in a porcelain shell on a pair of insulators.
Patent GB-1040094-A (GB)
Title: Rolling mill frames
Inventor: IDDON ARNOLD
IPC: B21B31/02
Filed: 1964-04-29
Abstract: 1,040,094. Making rolling mill frames; welding by fusion. DAVY & UNITED ENGINEERING CO. Ltd. April 29, 1965 [April 29, 1964], No. 17725/64. Headings B3A, B3M and B3R. A bulbous portion is formed on a rolling mill frame by electroslag welding a plate or block to the frame and machining away waste metal. Two U-shaped frames 11, 11A (Fig. 2, not shown) are spaced apart and located on their sides and a plate 15 of substantially the same thickness as the bases of the frames 11, 11A is interposed and secured by welding to blocks 16, 16A which are welded to the frames so that gaps are left between the ends of the plate 15 and the frames 11, 11A. Each end of the plate is electroslag welded to the associated frame by a machine using a fixed water-cooled copper shoe 18 (Fig. 3, not shown), a movable water-cooled copper shoe 19 and a plurality of electrodes reciprocated transversely. Subsequently the plate is parted, the frames are interchanged and the operations are repeated using a second plate 1S. After parting the second plate, the plate portions and welds are machined to shape and the resulting bulbous portions are bored. The bulbous portions may accommodate the mill screwdown members.
Patent GB-669371-A (GB)
Title: Improvements in and relating to clamps for framings or scaffolds
IPC: E04G7/14
Filed: 1949-07-05
Abstract: 669,371. Making clamps. MANNESMANNROHREN-WERKE., and STEFFEN, F. W. July 5, 1949, No. 17766/49. Class 83 (ii). [Also in Group X] Scaffolding clamps consist of two similar saddle-pieces 1, 2, each cut from a roller bar of forging iron or steel of the profile shown, welded back-to-back at the faces 6 at a right or other desired angle to one another, in conjunction with two similar cap-pieces 14 of the profile shown, also cut from rolled bar. The respective saddle and cap pieces 1, 2, 14 are connected by links 21, held in position by bending the flanges 7, 16 of the rolled sections, and clamped together at their opposite ends by screw-clamping members 26 connected to saddle-pieces 1 engaging flanges 17 on the cappieces.
Patent GB-602264-A (GB)
Title: Improvements in or relating to hollow-ware
IPC: A47L17/02
Filed: 1945-07-12
Abstract: 602,264. Hollow ware bowls &c. BEST, N. G. July 12, 1945, No. 17807. [Class 66] A bowl &c. 6 has a rubber or like cushioning ring 1 stretched around the outside of its beaded base-flange 5, the bead 4 of which fits a recess 2 in the ring. The ring may be in arcuate sections held by an encircling band.