baber/WOPTO huggingface dataset:
Patent GB-676000-A (GB)
Title: A static switch and its application to the conversion, the rectifying, the reductionand the regulation of electric currents
IPC: H02M11/00
Filed: 1948-10-21
Abstract: 676,000. Non-contact making relays. GABORIAUD, P. Oct. 21, 1948, No. 27426/48. [A Specification was laid open to inspection under Sect. 91 of the Acts, Feb. 13, 1950.] Class 40 (iv). [Also in Group XXXV] An electric current is controlled so as to result in a reduction in its value or in its inversion or rectification by the interaction with the voltage of its source of a train of pulses acting in such sense that the reverse voltage between the pulses acts against the source volts. This interaction takes place in an oscillatory circuit or a circuit of periodically varying damping. If pulses of which the reverse value Uo is equal to the voltage of source S are injected into the circuit of Fig. 6 at P, a train of unidirectional pulses is in effect produced, which sets in oscillation the circuit LCSP, which is tuned to the pulse frequency and cuts off the D.C. supply from source S to load R. LC blocks A.C. from R. By injecting pulses into or withholding them from the circuit, the effect of an off-on switch is obtained. This may be used for inversion to produce A.C. in C2, L2 (Fig. 7) of the frequency of the periodic injection of the pulses, or for half-wave rectification when S is replaced by an A.C. source. If the value of Vo is less than the amplitude of source S, the value of an A.C. or D.C. may be reduced without complete cut-off. The oscillatory circuit may be replaced by a non-linear circuit of which the damping of current in one direction is different from that in the other, e.g. in Fig. 12 where the circuit is coupled through M and M1 to a valve D. Whilst D.C. normally flows from S through M to Z, when pulses are injected at P the high time constant in the forward pulse direction restricts the current. Various other arrangements of the invention are referred to.
Patent GB-877868-A (GB)
Title: Cleaning apparatus for threshing machines
IPC: A01F12/44
Filed: 1959-08-13
Abstract: 877,868. Threshing machines. MASCHINENFABRIK FAHR A.G. Aug. 13, 1959 [Aug. 15, 1958; March 26, 1959], No. 27701/59. Class 6(3). A cleaning device in a threshing machine, of the type having a perforated drum 5 rotating within a casing 6, is provided with a fixed perforated plate 21 extending across the annular space between the drum and the. casing and forming with the latter a compartment 23 connected to a suction-fan 24. Threshed grain is fed by an elevator 2 to the drum 5 within which it is propelled by blades 4. Partitions 7, 8 divide the casing into zones discharging by separate spouts 14, 15, 16, 17. The portion of the drum-wall adjacent to each zone is appropriately perforated for the product passing therethrough. The perforations in the plate 21 comprise longitudinal louvres 25 flaring outwardly. Grain passing through the louvres settles in the wider upper end of the compartment 23 and slides down into the main outlet duct through an opening 26. In a modification, helical rubbing bars replace one of the propellors 4, for cleaning bearded crops, e.g. barley.
Patent GB-277417-A (GB)
Abstract: 277,417. Cumberland, E. June 15, 1926. Incrustation and corrosion, preventing. -Corrosion of metallic articles by stray electric currents is prevented by rendering the article cathodic in a circuit including the source of the stray current. In the case of a water main, for example, in the vicinity of a generating station, an insulated anode bar 2, Fig. 1, within the main 1 is connected either directly, or through a resistance, to the positive pole of the generator, and the main is similarly connected to the negative pole. An anode bar 5 may be buried in proximity to the main to prevent external corrosion. In a modification, the condenser 9, Fig. 2, of a steam turbine, on the rotor of which an electric potential is created, is protected by connecting an insulated anode 8 directly with collector rings 6 on the shaft 7. Specifications 13417/07, [Class 41, Electrolysis], 8422/08, 8068/09, 19637/11, and 216,103 are referred to.
Patent GB-1430994-A (GB)
Title: Liquid crystal display apparatus
IPC: G01D7/00
Filed: 1973-06-12
Abstract: 1430994 Alphanumeric displays SPERRY RAND CORP 12 June 1973 [20 June 1972] 27804/73 Heading G5C [Also in Divisions H3- H5] A homotropically aligned nematic liquid crystal layer 0À5 Î 1À5 Á thick is disposed between two transparent plane or curved substrates and is rendered birefringent by application of an electric field thereto via a pair of closely spaced electrodes on a single one of the substrates. As described, interdigitated comb electrodes are used to address an area of the liquid crystal layer. The area may be one of a plurality forming a matrix display (figure of eight, Fig. 11, or X-Y array), and one comb of each area may may be electrically common. The change in birefringence is shown by disposing the display cell between crossed or parallel plane polarizers with pricipal directions at 45 degrees to the length of the electrodes. It may be received by transmitted light, by diffuse light directed a second time through the cell by a diffuse reflector, or by light from a discrete source directed a second time through the cell by a specular mirror. By disposing a #/4 plate between the polarizer and the cell, the analyser may be omitted in the reflective embodiment.
Patent GB-756450-A (GB)
Title: Snap action electric switches
Inventor: SCHMOCKER KARL CHRISTIAN
IPC: H01H15/10
Filed: 1953-10-09
Abstract: 756,450. Lampholders; binding posts. BELMAR ELECTRIC CORPORATION. Oct. 9, 1953, No. 27861/53. Class 38 (1). [Also in Group XXXVII] A push switch (see Group XXXVII) is incorporated in a lampholder and the moving contact member 34 has a tail 44 co-operating with the centre contact of the lamp. A fixed contact 31 is connected to a terminal 28, and side contact 11 of the lampholder to a terminal 26, the incoming leads being passed through holes 68 in a cylindrical member 67 which is then turned to press the leads against the terminals. In a further modification (Figs. 8b-8i, not shown) the leads are clamped in sockets by wedges.
Patent GB-758438-A (GB)
Title: Improvements in tractor-implement systems
IPC: A01D34/38
Filed: 1952-11-05
Abstract: 758,438. Reaping machines. WILD, J. R. B. Feb. 4, 1954 [Nov. 5, 1952], No. 27899/52. Class 6 (3). [Also in Group XXIII] A tractor-mounted implement, of the type, having moving parts power-driven from the tractor, is characterized in that the drive comprises a rotary hydraulic motor 15 on the implement connected by conduits 17, 18 to a hydraulic pump on the tractor. As shown, the implement comprises a front-mounted mower 1 carried by standards 8 pivoted to parallel links 3, 10 on the tractor. The upper link 3 is a bellcrank and is connected to a threaded rod 5 by rotation of which the ground-clearance of the cutter-bar can be varied. The upper pivot 11 includes a slot 12 allowing break-back of the mower on meeting obstructions. A spring 14 attached diagonally between the links 3, 10 assists in raising the cutter bar. According to 'the Provisional Specification, the invention may also be applied to stationary appliances such as saw-benches.
Patent GB-464037-A (GB)
Title: Improvements in or relating to radio receivers for television or like purposes
IPC: H03D11/02
Filed: 1935-10-10
Abstract: 464,037. Valve circuits for wireless reception. BAIRD TELEVISION, Ltd., and MERDLER, L. R. Oct. 10, 1935, No. 27971. [Class 40 (v)] In a super-regenerative receiver for television part of the output of one of the scanning generators is utilized to quench one or more of the super - regenerating stages. A harmonic of the scanning frequency is preferably used for quenching. The Figure shows an arrangement in which the quenching oscillations are applied to a screening grid from an oscillatory circuit LC fed from the scanning generator V1, which may give a substantially square-topped waveform potential.
Patent GB-812128-A (GB)
Title: Improvements in or relating to surface discharge plugs
Inventor: SHOOBERT GEORGE WILLIAM
IPC: H01T13/52
Filed: 1954-09-28
Abstract: 812,128. Sparking plugs. KL.G. SPARKING PLUGS Ltd. Dec. 28, 1955 [Sept. 28, 1954], No. 28011/54. Class 7(4) A surface discharge ignition plug is produced by heating a semiconductive material which separates two electrodes so that a bond is established between each electrode (or a metal member connected to the electrode) and the semiconductive. Fig 2 shows a surface discharge plug comprising nickel-iron electrodes 11 and 13, the latter consisting of a ferrule which fits into the plug body 17. In assembly, ferrule 13 is located on the tubular ceramic insulator 12, and the space between insulator 12 and each of the electrodes 11 and 13, and the intervening surface on insulator 12, is covered with a thick paste of semiconductive material, for example a suspension in water or alcohol and fired in a non- oxidizing atmosphere such as nitrogen to a temperature below the melting point of the electrodes but above that of the material. On cooling the material is bonded to the electrodes the surfaces of which are grooved to assist bonding. The semiconductor material may consist of a high melting point glass containing iron oxide as described in Specification 724,016 and the electrodes may consist of "Telcoseal" (Registered Trade Mark). Reference has been directed by the Comptroller to Specifications 740,872 and 745,016.
Patent GB-361048-A (GB)
Title: Improvements in and relating to rotary offset printing machines
IPC: B41F7/06
Filed: 1930-09-19
Abstract: 361,048. Printing-machines. HORN, J., 76, Zeunerstrasse, Dresden, Germany. Sept. 19, 1930, No. 28040. [Class 100 (ii).] Rotary machines.-A multi-colour offset machine in which two or more sets of impression cylinders b, b<1>, offset cylinders c, c<1>, and plate cylinders d, d<1> are arranged in tandem, with a sheettransferring cylinder e connecting the impression cylinders, is constructed so that the cylinders rotate in such directions that the sheet fed from a table a passes between the cylinders b, e before receiving the first impression from the cylinders b, c. For multi-colour impressions the sheet is transferred from the cylinder e to the impression cylinder b<1> with the first impression on the outside of the sheet, and a superposed impression is printed by the cylinder c<1> before the sheet is taken by the delivery chains f. To produce a perfected impression, the cylinder b<1> is fitted with an offset blanket and the cylinder e with an impression blanket, so that the perfected impression is produced as the sheet passes between the cylinders e, b<1>. Each plate cylinder may be fitted with more than one printing- plate so that the sheets may be perfected in multicolour. The feed table may be arranged to feed the sheets direct to the cylinder b<1> when printing from one-half of the machine only, or the table may be arranged above the delivery table and feed direct to the cylinder e instead of to the cylinder b.
Patent GB-1268393-A (GB)
Title: Friction welding a sintered workpiece to another sintered or non-sintered workpiece
IPC: B23K20/12
Filed: 1969-06-03
Abstract: 1,268,393. Welding by pressure. CATERPILLAR TRACTOR CO. 3 June, 1969 [19 July, 1968], No. 28082/69. Heading B3R. In a method of friction welding two workpieces, at least one being of porous sintered metal, relative rotation of the workpieces at a velocity of 500-4000 feet per min. at the outer diameter of their interface is effected, the workpieces are forced into frictional engagement under a pressure of 5000-30,000 p.s.i. and an energy input at the interface of 15,000-50,000 feet lb. p.s.i. is provided to join the workpieces in a weld zone comprising a hot worked metallic structure free of voids and substantially non- porous. A first workpiece of sintered steel or sintered copper and a second workpiece of sintered metal or non-sintered metal are clamped in the chucks of an inertia welding machine. Workpiece WP2 is clamped in non-rotatable chuck 16 on the movable tail stock 18 of the machine and the workpiece WP1 is clamped in rotatable chuck 14 on a spingle 22 carrying flywheels 24. An electric motor 26 rotates the spindle 22 through an hydraulic pump 30, an hydraulic motor 32 and a manifold 34 until a predetermined velocity is obtained. The motor 26 is disconnected or shut down and a ram 20 is operated to bring the workpiece WP2 into contact with workpiece WP1, rotation ceasing when the stored energy has dissipated. The ranges of surface velocity, axial pressure and input energy for sintered steel are 500-1500 feet per min.; 15,000-30,000 p.s.i. and 20,000-50,000 feet lb. p.s.i. and for sintered copper are 1800-4000 feet per min.; 5000-30,000 p.s.i. and 15,000- 50,000 feet lb. p.s.i. Materials which may be welded are sintered steel, sintered copper, steel and copper alloys, e.g. copper-tin base or ironcopper base and sintered metals saturated with cooling fluid, e.g. oil or water.
Patent GB-232516-A (GB)
Title: Improvements in or relating to lock nuts
IPC: F16B39/286
Filed: 1924-11-24
Abstract: 232,516. Cole, E. J. Nov. 24, 1924 Locking nuts. - A self - locking nut is formed by making an incision 11 in the face of a nut-blank, drilling and tapping the bolthole 13 and subjecting the nut to pressure to close the ends of the incision 11 as indicaited in Fig. 4. The bolt-hole 13 converges in the vicinity of the cut 11 after the nut has been compressed and assumes an oval shape.
Patent GB-730728-A (GB)
Title: Self-centering clamp
Inventor: WALTERS GEORGE
IPC: B23Q3/06
Filed: 1952-11-08
Abstract: 730,728. Vices. MARBAIX, Ltd., G. E. Sept. 16, 1953 [Nov. 8, 1952], No. 28196/52. Class 61. In a self-centring clamp, the oppositely moving jaws are operated by fluid - pressure applied to a cylinder and piston device, the cylinder 30 being movable with one jaw 7 and the piston-rod 27 movable with the opposed jaw 6 and independent mechanical means are provided to ensure simultaneous movement in opposite directions of the cylinder and piston-rod each with its associated clamping jaw. The jaws 6, 7 are detachably mounted on jaw carriers 10, 11 which are slidable in guides on a bottom guide plate 3 mounted on a hollow base member 1. The means for effecting simultaneous movement of the jaws in opposite directions comprises a double armed lever 43 centrally pivoted on a vertical pin 42 supported at its upper end in the plate 3 and at its lower end in the base 1. Pivoted links 44 connect the ends of the lever to the jaw holders 10, 11. The jaw 6 has a forwardly projecting part which interengages between two projecting parts of the jaw 7, both jaws having V-shaped recesses or recesses shaped to clamp hexagon bars. Fluid is supplied to either side of the double acting piston 36, pressure fluid supplied to the left of the piston tending to move the piston to the right and the cylinder 30 to the left and causing engagement of the jaws with the work. To disengage the jaws pressure fluid is supplied to the right of the piston. The Provisional Specification describes also a construction in which the twoarmed lever is replaced by a duplex cam.
Patent GB-283679-A (GB)
Title: Process of manufacturing an accelerator for the vulcanization of rubber
IPC: C07D277/72
Filed: 1926-11-09
Abstract: 283,679. Kelly, W. J. Nov. 9, 1926. 1-Mercaptobenzothiazole, which is used as an accelerator in the vulcanization of rubber, is prepared by heating to about 280‹ C. in an autoclave, aniline, sulphur and carbon bisulphide. The product is dissolved in sodium hydroxide and precipitated with hydrochloric acid.
Patent GB-931052-A (GB)
Title: Improvements in or relating to time division communication systems
IPC: H04J3/12
Filed: 1961-08-03
Abstract: 931,052. Automatic exchange systems. WESTERN ELECTRIC CO. Inc. Aug. 3, 1961 Aug. 23, 1960], No. 28274/61. Class 40 (4). In a time division multiplex switching system comprising a plurality of subscriber lines having individual filters and a plurality of trunks having individual filters, the cut-off frequencies of the line and trunk filters are different but their sum is equal to the sampling frequency of the system. It is shown mathematically that such filters are consistent with good transmission quality and it is stated that signals are only slightly attenuated when two subscribers in the same group i.e. not using the trunks, are in communication. The use of such filters is described with reference to a system in which ringing tone of 600 c.p.s. from source 35 is applied to the common transmission link 18 in a particular time slot during alternate sampling cycles, while ring-back tone from source 36 is applied to link 18 in the same time slot but during the remaining alternate cycles. Using a 12.5 kc/s. sampling rate and conventional filters having a cut-off equal to half this frequency i.e. 6.25 kc/s., then the lower sideband produced when the ringing tone is modulated by the sampling signal in alternate cycles would not be sufficiently attenuated by such filters i.e. both the 600 c.p.s. ringing and 5.65 kc/s. sideband signals would be transmitted, which results in a poor ringing performance. However, by giving line filter 14 a cut-off of 4 kc/s., trunk filter 22 a cut-off of 8.5 kc/s., filter 33 a cut-off of 2.25 kc/s. and filter 34 a cut-off of 4 kc/s., satisfactory results are obtained. Thus during ringing the sampling rate is 6.25 kc/s. and filters 33 and 14 are involved, the sum of their cut-off frequencies being 6.25 kc/s.; there is a discrepancy for the ring-back signals because the sum of the cut-off frequencies of filters 34 and 22 is 12.5 kc/s. but this is of little consequence; for speech transmission the sampling rate is 12.5 kc/s. and filters 14 and 22 are involved, their cut-off frequency sum being 12.5 kc/s. It is stated that the line filters only require three elements as compared with conventional filters which have five elements but the trunk filters require seven elements, both filters presenting 2000 ohms impedance to the link 18. Specification 921,384 is referred to.
Patent GB-363664-A (GB)
Title: Improvements in or relating to the production of milk preparations
IPC: A23C19/04
Filed: 1930-09-22
Abstract: A milk preparation is obtained by adding rennet to raw or previously boiled cold milk, allowing to stand for 15 minutes, then rapidly heating to about 100 DEG  C., without boiling, for 2-5 minutes, and finally allowing it to cool.  The rennet is preferably added in powdered form mixed with the sugar necessary for sweetening the product.  Vanilla, coffee, chocolate, &c. may be added to the sugar for flavouring.
Patent GB-1526716-A (GB)
Title: Lacquer tube with a removable cap
IPC: B65D51/24
Filed: 1977-07-06
Abstract: 1526716 Brush combined with rust removing member PETER KWASNY GmbH & CO 6 July 1977 [6 July 1976] 28302/77 Heading A4K [Also in Division B8] A lacquer tube 1 has a closure 2 with an internal thread 5 and a brush 6 for applying the lacquer. Closure 2 also provides a compartment 7 in an upward extension 3 for a rust-removing member e.g. wire 4c held in rod 9, which member seats in extension 3 by means of ears 4a engaging in slots in the wall of the extension.
Patent GB-1275471-A (GB)
Title: Improvements relating to photo-resists
Inventor: CELESTE JACK RICHARD
IPC: H05K3/00
Filed: 1969-06-04
Abstract: 1275471 Processing photo-polymerizable materials E I DU PONT DE NEMOURS & CO 4 June 1969 28358/69 Addition to 1128850 Heading G2C A photographic process wherein a material comprising a polymeric support coated with a layer containing a photo-polymerizable compound with less than 10 ethylenically unsaturated groups for molecule and a photo-initiator; the layer having at best moderate adhesion for the support and being laminated to a solid surface at a temperature up to 150‹C. is imagewise exposed before or after removal of the support, liquid developed to remove the unexposed areas of the layer and subjecting the bared areas of the surface to an etching or plating treatment. A protective cover sheet may be laminated to the layer which sheet is removed before lamination of the layer to the surface. Specified surfaces are copper, aluminium or glass. The remaining resist may be removed after etching or plating the surface. The photo-polymerizable layer may contain a dye and preferably contains a binder.
Patent GB-991806-A (GB)
Title: Improvements in or relating to the manufacture of tennis and similar play-balls
Inventor: BUKALDERS EDWARDS
IPC: B29D22/04
Filed: 1962-07-24
Abstract: A hollow tennis or play-ball is formed from a composition containing natural or synthetic rubber, and a homo-polymer of styrene.  The interior is at, or slightly greater than, atmospheric pressure and the exterior is covered with a textile pile fabric.  Examples of suitable compositions are given in some of which polybutadiene is a main constituent.  The ball is made by curing the composition in a pressure mould.  Specification 808,291 is referred to.
Patent GB-308155-A (GB)
Title: Improvements in or relating to guide apparatus for strip rolling mills
IPC: B21B39/16
Filed: 1928-10-04
Abstract: 308,155. Jackson, L. Mellersh-, (Watkins, W. E.). Oct. 4, 1928. Cold-rolling. - Mills for cold rolling a pack of strips have guides for aligning the strips formed to engage the edges of the strips and provided with separate plates to facilitate tha independent guiding of each strip. The guide channel 46 is formed to engage the rolls closely and is fitted with side plates 51 to provide adjustment for the width of strip. The strips are separated by plates 50. The plates 50 and 51 are prevented from passing through the guide by enlarged ends 53, 52 and the degree of pressure is adjusted by means such as a wedge 54. A second series of plates similar to the plates 50 may be fitted at 39, Fig. 1. to provide tensioning means, and a third series 7, in a trough 5 with adjustable sides, weighted at 9 to clean the strips and remove surplus oil. The two high mill is driven from an electric motor through a chain driving a hand lever controlled friction-clutch. The rolled strips are separately reeled on drums 58 driven from a further motor.
Patent GB-1324462-A (GB)
Title: Treating steel sheet
IPC: C23C14/58
Filed: 1971-06-17
Abstract: 1324462 Coating sheet steel COCKERILLOUGREE-PROVIDENCE ET ESPERANCELONGDOZ 17 June 1971 [24 June 1970] 28485/71 Headings C7F and C7U A coating of aluminium is applied on to sheet steel by vacuum deposition, the coating being oxidised in air as the sheet emerges from the coating unit at a temperature between 100C. and 250C. The coated sheet is then subjected to either the action of hot water above 60C., or steam, whereby the Al 2 O 3  coating is transformed into the hydrated oxide. Al 2 O 3 (OH) x . The process may also be applied to steel plate or strip.
Patent GB-386379-A (GB)
Title: Improvements in small gas burners and pilot jets
IPC: F23D99/00
Filed: 1931-10-14
Abstract: 386,379. Gas burners ; pilot jets. HORSTMANN, J. H. G., HORSTMANN. F. 0., and HORSTMANN GEAR CO., Ltd., Newbridge Works, Bath. Oct. 14, 1931, No. 28509. [Classes 75 (i) and 75 (iii).] In a small acetylene or other gas burner or a pilot jet, the outlet orifice is provided in a thin platinum or platinum alloy disc 5 fixed by spinning or riveting in a body 1 of chromium-surfaced metal. In one form, the body 1, Fig. 1, is integral with a cup 2 having air inlets 4 in the base. The cup may be open at one side. In a second form, the body 1, Fig. 3, branches upwardly from an integral dust-trap 7. In a third form, a cup 4a, Fig. 5, extends laterally from a dust-trap 7a.
Patent GB-1508465-A (GB)
Title: Refrigeration apparatus
IPC: F25D23/06
Filed: 1975-07-08
Abstract: 1508465 Refrigerator cabinets T OHASHI 8 July 1975 [10 July 1974] 28638/75 Heading F4H The panels which form a refrigerator cabinet are snap-fitted together by demountable joints. The joints include female parts 2b which include converging free end portions 2b and male parts 2a having opposed sides 2a which co-operate with the portions 2b 1 . The panels are joined together by inserting the male portion into the female portion. The respective parts of the joint 32a, 32b may have co-operating curved surfaces. Decorative plates may be snapfitted onto projections (2b 3 , Fig. 3b).