baber/WOPTO huggingface dataset:
Patent GB-975675-A (GB)
Title: Process of producing high-molecular weight,polymers from mono-olefins
IPC: C08F110/00
Filed: 1961-09-04
Abstract: Polymers of olefines e.g. ethylene are made by polymerizing the monomer in the presence of a catalyst consisting of an organometallic compound of a metal of Group I to III of the Mendel<\>aeeff Periodic Table and a compound of a metal of Group IV to VI(ALPHA) of the Periodic Table, and an organic acid, e.g. formic acid. The acid may be added to the other components of the catalyst or to the reaction product of the other components.  The catalyst may be "aged". The polymers are recovered by conventional techniques.
Patent GB-428538-A (GB)
Title: Improvements in and relating to electric motors
IPC: H02K27/10
Filed: 1933-11-15
Abstract: 428,538. Alternating-current commutator motors. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London, and MAGGS, A. H., 14, Oval Road, Hillmorton Paddox, Rugby. Nov. 15, 1933, No. 31862. Drawings to Specification. [Class 35] In order to reduce the starting current of a single-phase repulsion-start induction-run type of motor or of a repulsion induction motor e.g. as described in Specification 208,222, [Class 35], a condenser is connected across the whole or a part of the primary winding. The condenser is cut out when the motor has run up to speed or if two condensers are employed, one may be left in for power factor correction.
Patent GB-1111225-A (GB)
Title: Improvements in casting processes
Inventor: WOOLCOTT ARTHUR JOHN
IPC: B22D19/00
Filed: 1965-07-26
Abstract: <PICT:1111225/C3/1> In two-part casting, e.g. in casting a light metal or alloy skirt 4 on to a ferrous or heat-resisting alloy crown 1 of a piston, cavities 2, 2a are filled with a water-soluble salt core prior to the casting on of the skirt 4 to prevent them being filled with the molten metal of the skirt, the cores being dissolved out after the skirt has solidified by means of warm or hot water. The soluble cores may be entered outwards from the first cast part so as to form a cavity in the second cast part.  Passages in the piston may be defined by steel tubes around which the skirt 4 is cast, the tubes being filled with a soluble core during casting. In examples described crown 1 is made of steel or a nickel alloy and the skirt 4 is made of aluminium or aluminium alloy.  The soluble core may comprise sodium sulphate alone or in combination with potassium sulphate or sodium chloride; sodium carbonate with potassium carbonate; or may include a refractory or insoluble filler material such as aluminium oxide (alumina), calcium sulphate or barium carbonate.  Other soluble core materials which may be used are alkaline metal chloride such as sodium chloride or potassium chloride or a mixture thereof; or a mixture of sodium silicate and sodium chloride which is set by CO2.  The cores may be compacted into the cavities.
Patent GB-254191-A (GB)
Title: Oven and broiler rack handling device
IPC: A47J37/06
Filed: 1925-12-17
Abstract: 254,191. Parke, Inc., W., (Assignees of Parke, W.). Oct. 26, 1925, [Convention date]. Oven shelves.-A device for operating sliding shelves, racks, and broiler pans in ovens, comprises a plurality of substantially vertical arms 21, 22 spaced apart on a transverse member 20 having means to move it to and from the rear of the oven, the arms in their forward movement causing the shelves &c. to move out of the oven. The apparatus shown comprises a framework adapted to be inserted in the oven and formed of front and rear members 11, 12 connected by tubes 18, 19. The bridge member 20 is guided by means of cylinders 49 secured to its ends and sliding in the tubes 18, 19, which are provided with slots 48 for this purpose. In addition to, or in place of, these means for guiding the member 20, rollers 50, 51 bearing on the tubes 18, 19 may be provided. The means for moving the member 20 comprise a rack 27 operated by a crank 37 through a pinion 34; or the member 27 may be plain and operated by a hook or tool adapted to engage its front end. The rear ends of the shelves &c. engage in notches 23 in the arms 21, 22, the front ends being supported on rollers 55 carried on uprights 57 secured to the front frame member 11. Between the arms 21, 22 is an upright member 26 carried by the member 20 and serving to retract the shelves, which are provided with fingers 61 engaging the member 26 and carried on a shaft 60, which may be operated from the front of the shelf to engage or disengage the finger 61 from the member 26. To secure the frame in the oven, clamping elements are provided consisting of screws 73 carried in swivelling brackets 75 and having either pointed ends or terminal discs 77 adapted to engage the oven walls or lining. In the case of new stoves the tubes 18, 19 and rollers 55 may be connected directly to the oven walls, the frame elements being largely dispensed with. Specification 237,143 is referred to.
Patent GB-504762-A (GB)
Title: A new or improved method of, and means for, cooling, drying and re-heating compressed air
IPC: B01D53/26
Filed: 1937-11-20
Abstract: 504,762. Cooling air ; separating liquid particles from air. SUPERHEATER CO., Ltd., and PICKSTONE, M. T. Nov. 20, 1937, No. 31997. [Classes 29 and 123 (iii)] Compressed air is cooled and dried in two stages, comprising in the first stage heat exchange with the air leaving the second stage cooler, where water or other cooling medium is employed. Means for intercepting oil &c. is provided at the end of the first stage and similar means for separating condensed moisture is provided in the second stage, the direction of the air flow being reversed at the intercepting means. Compressed air enters a casing 1 at inlet 3 and flows downwards through small tubes 7, and its direction is reversed at region 12 where oil &c. is intercepted by a wire brush 120 and led off at 13. The air rises through a central conduit 10 and passes through a bend 14 to a second cooler comprising tubes 15 leading to a coned member 19 and tube 19a and surrounded by water flowing upwards in the casing 2. The direction of the air flow is again reversed in region 22 and moisture grit &c. is intercepted by a wire brush 220 and scrubbing means 20 such as a roll of expanded metal, leadbrass wool &c. The air passes by branch 21 to casing 1 and flows around tubes 7, 10 to outlet 4. The two coolers may be arranged concentrically. The tubes may be mounted in the tube plates in the manner described in Specification 504,764.
Patent GB-188972-A (GB)
Title: Improvements in and relating to platen machines used in the manufacture of cardboard and like boxes
IPC: B31B50/25
Filed: 1921-11-30
Abstract: 188,972. Cullen, J., and Ritchie & Son, Ltd., A. Nov. 30, 1921. Sheet-registering devices.- Relates to gauges for adjusting the position of stationary work in platen machines which operate upon cardboard and like blanks. Strips 1, 2, 4 secured to the edges of a cutting-plate 3 have notches which receive the ends of gauge-bars 6, 7. The gaugebars are notched to receive the shanks of flat stops the heads of which abut the blank. Leaf springs 11, 13 hold the stops against the bars and allow of the insertion of liners behind the heads 12 of the stops as a fine adjustment.
Patent GB-797521-A (GB)
Title: Improvements in and relating to turbine blades
Inventor: BETTERIDGE WILLIAM STUART
IPC: F01D5/22
Filed: 1954-11-08
Abstract: 797,521. Turbine blades. PARSONS & CO., Ltd., C. A. Dec. 15, 1955 [Nov. 8, 1954], No. 32230/54. Class 110 (3). In a ring of turbine blades d of the kind formed with integral shrouds c, the shrouds are secured together by means of a plurality of sliding members a which engage the blade shrouds, the length of the members being such that when they are all in position, their total circumferential length is less than the total circumference by slightly more than one blade pitch. The sliding members and shrouds together form a wedge-shaped joint. In the embodiment shown, the shroud members are each formed with a wedge-shaped recess band the sliding members are of corresponding wedge shape, the sliding members each having a length equal to approximately four blade pitches. Alternatively, the blade shrouds may be formed with edge-shaped projections which are engaged by sliding members having correspondingly-shaped recesses. The sliding members are dimensioned so that the final blade of the row may be inserted, the members then being moved circumferentially so that the gap of slightly more than one blade pitch is spread uniformly around the circumference. The sliding members are then secured in position by light caulking or rolling so that they expand and fill the recesses.
Patent GB-604663-A (GB)
Title: Improvements in or relating to articulated couplings for individually driven axles of rail or other vehicles
IPC: F16D3/16
Filed: 1944-05-04
Abstract: 604,663. Universal couplings. TRIGGS, W. W. (Schweizerische Lokomotiv-und Maschinenfabrik). May 4, 1944, No. 32285/46. Divided out of 583,051. [Class 80 (ii)] An articulated coupling for the individuallydriven axles of rail or other vehicles comprises an annular member 38 pivotally mounted and accommodated within the driving gear 35 by radial and diametrically opposite pins 37, and having axially-extending arms 6 engaging radial pins 41 on a member 42 secured to the axle 1 of the driving wheels 2. The arms 6 are slotted at 39 and co-operate with bearing blocks 40 on the pins 41 to allow of relative axial and radial movement between the coupling parts. In a modification the arms 6 engage in slots in the member 42.
Patent GB-1271832-A (GB)
Title: Improvements in and relating semiconductor devices
IPC: H01L45/02
Filed: 1969-06-26
Abstract: 1,271,832. Semi-conductor amplifier circuits. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 26 June, 1969 [29 June, 1968], No. 32370/69. Heading H3T. [Also in Division H1] A microwave signal amplifier comprises a semi-conductor layer provided with laterally spaced contacts and supported by a substrate upon which it is epitaxially grown. The semiconductor is one such that a negative differential resistance is shown between the contacts upon the application of a sufficiently high direct voltage between them. Formation of high field domains is prevented by keeping the product of zero field carrier concentration and contact spacing below a certain critical figure and by keeping the thickness of the layer below a particular value. In this invention the critical figure is raised from the usual value by providing a boundary region of higher resistivity alongside the semi-conductor layer; such a region may be constituted by the substrate and/or by a coating of suitable material on the face of the semi-conductor layer opposite to the substrate. In the Figure shown (Fig. 3), the substrate 1 is a high resistivity (10<SP>4</SP> ohm cm.) wafer of gallium arsenide or alternatively is a high resistivity layer at the surface of a low resistivity gallium arsenide substrate. The active layer 2 is an N-type layer of gallium arsenide (e.g. of 1 ohm cm. resistivity) grown in an atmosphere containing silicon, tellurium, tin, or selenium. The contacts 3, 4, 11, 12 are formed by alloying tin to the layer in a hydrogen atmosphere, care being taken that the inner contacts 11, 12 are but shallowly alloyed. The direct voltage is applied between the outermost contacts, the input voltage U 1  is applied as shown, and the output voltage U 2  is obtained from contacts 12, 4. In other embodiments (Figs. 1 and 4, not shown), one or both inner contacts 11, 12 may be dispensed with. For example, using two contacts (3, 4) only, the direct voltage may be connected as shown and the input signal fed down a coaxial cable whose sheath is connected to contact 3 and whose core is connected, via a capacitor, to contact 4; the output voltage is reflected back along the coaxial cable. In another embodiment, the surface of the active layer may be coated with a layer of high resistivity and high dielectric constant made of epoxy-resinbound particles of barium titanate, strontium titanate, or titanium dioxide. Variant materials for the active semi-conductor layer are cadmium telluride, indium phosphide, and zinc selenide. In variant structures it is possible to provide one or more capacitative control electrodes (e.g. with oxide insulation) on the active layer at points intermediate the electrodes to which the direct voltage is applied.
Patent GB-294419-A (GB)
Title: Improvements relating to slicing machines
IPC: B26D7/06
Filed: 1927-12-02
Abstract: 294,419. Berkel, J. C. van. Dec. 2, 1927. Cutting slices in succession. - In a slicing- machine wherein the feed table 2 is detachably mounted on a block and slidable on a guide bar 3 mounted on the undertable, the block is provided with projections 9, 10, Figs. 1, 2, or a rib 23, Figs. 5, 6, of trapezial cross-section adapted to engage a similarly-shaped groove 13 in the table 2 or vice-versa, for locating the table correctly on the block, and a latch is provided for locking the table in position when so located. As shown in Figs. 1, 2, the latch comprises a member 12 pivoted in a pocket 17 in the block. A spindle 19 extending through the block carries an eccentric 20 engaging the member 13. By turning the spindle, the member 12 is moved against the action of a spring 18 so as to cause a toe on the end of the member to engage a notch 15<1> in a recess 15 in the table, while the wall of a rectangular recess 14 in the table is simultaneously tightened against a projection 11 on the block, thus locking the table in position. As shown in Figs. 5, 6, a recess 25 in the side of the table has inclined walls fixed to the block while the stop 29 is pivoted thereto. A wall 35 located between the stops is centred in an aperture 36 into which is screwed a member 37. By turning the member 37 clockwise, the ball is forced inwards, moving the stops apart against the action of a spring 32, whereby they are caused to bear hard against the walls 26, 27 and lock the table in position. Feed mechanism as described in Specification 294,418 is provided.
Patent GB-521249-A (GB)
Title: Improvements in or relating to systems of gears having non-circular pitch curves
IPC: F16H55/08
Filed: 1938-11-09
Abstract: 521,249. Toothed gearing. DESCHAMPS, E., and COLIN, R. Nov. 9, 1938, No. 32555. Convention date, Nov. 10, 1937. [Class 80 (i)] Two non-circular and non-elliptical gear wheels have pitch surfaces which are determined by polar equations given in the Specification. The wheels shown in Figs 3 and 3a each have two sets of staggered teeth XY the profiles of which are the envelopes of " a number of its tangents "or of " successive positions of a milling cutter ... represented by the circle of centre C," Fig. 3. The pitch surfaces are stated to be slightly out of contact in the neighbourhood of their maximum and minimum diameters. Teeth on the pitch surfaces of the wheels may be dispensed with.
Patent GB-260445-A (GB)
Title: Improvements in or connected with the spindle supports used for the paper cones or the like used in winding frames
IPC: B65H54/54
Filed: 1925-12-24
Abstract: 260,445. Warburton, J. B., and Warburton, F. Dec. 24, 1925. Winding-machines.-A support for paper cones for use in winding-frames comprises a spindle b, Fig. 1, upon which is fixed a screwed cone e, a larger cone a being free to slide thereon under the control of springs c, d. The support is introduced into the paper cone h, and by means of the wing member g, screwed forward into position, as shown in Fig. 2, the cone a being fixed by compression of the spring d. Alternatively, the larger cone a may be fixed and threaded, while the member e is free to move on the spindle b under spring control. If the spindle b is non-revoluble, the members a, c, d, e, g are mounted on a revolving sleeve.
Patent GB-1417649-A (GB)
Title: Tea
IPC: A23F3/36
Filed: 1973-07-09
Abstract: 1417649 Decaffeinated tea product BROOKE BOND LIEBIG Ltd 9 July 1974 [9 July 1973] 32599/73 Heading A2B Green leaf is subjected to one or more organic solvent extraction steps before or after a fermentation step, and the extracted leaf is separated and either fired or further treated to produce an instant tea composition. The green leaf may be subjected to conventional withering and disrupting operations prior to extraction. The solvent may be a halogenated hydrocarbon (methylene chloride) or an aliphatic ester (ethyl acetate). After extraction the leaf may be subjected to slurry fermentation.
Patent GB-1515679-A (GB)
Title: Electromagnetic relay
IPC: H01H51/06
Filed: 1975-08-05
Abstract: 1515679 Electromagnetic relays MATSUSHITA ELECTRIC WORKS Ltd 5 Aug 1975 [22 Aug 1974] 32692/75 Heading H1N A flat type electromagnetic relay has a core 2 with an integrally formed coil frame with positioning posts 19, 20 for receiving contact carrier assemblies 60, 70 as well as an armature biasing spring 50 (and insulating spacer 45). Projections 16, 17 of the frame fit is casing holes 40, 41 and projections such as 70b fit in holes 42, 43. The ends of the posts 19, 20 are "caulked" to secure the parts together and a cover plate 90 is secured to the assembly 70. The carrier assemblies together provide one set of normally open contact springs and one set of normally closed contact springs and the arms 54, 55 of the biasing spring 50 are bent to different extents to compensate for the differing bias on the contact operating card 80.
Patent GB-790948-A (GB)
Title: Improvements in or relating to an apparatus for producing periodic m.m.f. impulses
IPC: H02M1/26
Filed: 1955-11-15
Abstract: 790,948. Rectifying. SIEMENS SCHUCKERTWERKE AKT.-GES. Nov. 15, 1955 [Nov. 15, 1954], No. 32707/55. Addition to 745,173. Class 38 (2). In a contact converter having in series with each contact 13 a switch choke 12 magnetized, before contact closure for phase angle control by a pulse producing circuit of the kind described in the parent Specification including a saturable choke 18, the premagnetization of choke 18 is made to vary with the supply volts in such a way that the output volts tend to remain constant. A resistor 8 in series with a rectifier 7 is connected across a rectifier 17 (and optionally across winding 16) in series with back-magnetizing winding 16 of the switch choke, this auxiliary circuit being energized from the main supply. During half-cycles when the pulse for premagnetizing the switch choke is not produced, back magnetization passes through choke 18 in such direction that it opposes that produced by D.C. in winding 20, and the value of volt seconds applied is restricted by resistor 8. The effect is to alter the back magnetization of the switch choke 16 and therefore the degree of voltage control so that output voltage fluctuations are reduced. The output voltage may be regulated by variation of D.C. in winding 20 or by variation of resistor 8. In an alternative construction, Fig. 2, the currents in different directions flow through different parts of the choke 18 which has a tapping connected to a, tapping on a resistor 19 connected between main supply phases. Rectifier 7 with winding 8 and rectifier 17 with winding 16 are connected respectively across different parts of resistor 19 and choke 18. In a modification the the premagnetization circuits may be connected in star and supplied through an auxiliary transformer from the main supply (Fig. 3, not shown). The resistor 8 may be replaced by a further saturable choke.
Patent GB-266494-A (GB)
Title: Improvements in or relating to photographic reflex cameras
IPC: G03B19/12
Filed: 1925-12-28
Abstract: 266,494. Houghton-Butcher Manufacturing Co., Ltd., Denniss, A. J., Dockree, W., and Edwards, V. W. Dec. 28, 1925. Additional to 210,531. Reflex cameras.- The construction according to the parent Specification is modified in two respects. (1) The vertical sliding panel 19, Figs. 1 and 2, connected to the extension 18 of the mirror 17 is depressed to set the camera for focusing by two rollers 21 on spring-controlled levers A, B, the lever A being directly operated from outside the camera, and indirectly operating the lever B by a roller E. (2) The panel 19 is held in set position by a central catch C<1>, Figs. 1 and 4, on a resilient plate C. The catch projects through the aperture D<1>, and is released by a transverse lever J pivoted to a stamped-out projection Hand operated by the push lever L. A sliding plate closure shutter may be substituted for the pivoted blade shutter described in the parent Specification.
Patent GB-967794-A (GB)
Title: Improvements in or relating to radar systems
Inventor: ADAMS FRANCIS NEIL
IPC: G01S13/68
Filed: 1959-09-25
Abstract: 967,794. Radar. ELLIOTT BROS. (LONDON) Ltd. Sept. 26, 1960 [Sept. 25, 1959], No. 32743/59. Heading H4D. In an arrangement for reducing random variations in a radar (echo) signal, the latter signal, being a function of the target position, is resolved into components along selected axes by means of a resolver 3 (Fig. 1) after which the random variations only are passed by a filter 4, re-resolved by a second resolver 5 and fed to a subtraction circuit 2 which has as a further input the original echo signal. Fig. 3 shows a particular embodiment in which the radar system 1 supplies a bearing signal B and velocity components r (towards the radar location) and rB (at right angles thereto). The bearing signal controls a motor 7 which produces a corresponding angular displacement of two resolvers 9 and 10, the latter (corresponding to resolver 3, Fig. 1), having inputs from subtraction circuits 11, 12, to which the velocity components are respectively supplied, and outputs connected to filters 13, 14 (corresponding to filter 4, Fig. 1) which supply the random components to resolver 9. The re-resolved outputs from the latter are then supplied to the subtraction circuit 11, 12, the outputs of which, consisting of " smooth " signals, are utilized in known manner, e.g. in a predictor system. A complete arrangement including the system of Fig. 3 with the addition of " smoothing " of signals representative of the elevation of the target is described with reference to Fig. 4 (not shown).
Patent GB-253816-A (GB)
Title: Improvements relating to the cleaning of the fire-tubes of a boiler
IPC: F28G3/10
Filed: 1925-12-29
Abstract: 253,816. Spencer-Bonecourt, Ltd., Gaskill, M. S., and Kendrich, H. B. Dec. 29, 1925. Cleaning internally.-A fire-tube is cleaned by inserting a guide tube d Fig. 1, through a perforation in the end plate of the box b at one end of the boiler so that the guide tube fits the end of the fire tube to be cleaned, and pushing through the fire tube and guide tube a cleaning tool e, Fig. 3, carried by a flexible rod h which makes an angle with the guide tube so that it is not necessary to provide any considerable clearance at the end of the boiler. Specification 186,801 is referred to.