baber/WOPTO huggingface dataset:
Patent GB-702974-A (GB)
Title: Improvements in or relating to supports for coated abrasive belts
IPC: B24B21/00
Filed: 1951-11-14
Abstract: 702,974. Abrasive-band machines. CARBORUNDUM CO. Nov. 14, 1951 [July 26, 1951], No. 26699/51. Class 60 [Also in Group XXIV] A support 10, Fig. 5, for holding an abrasivecoated band, Fig. 1 (not shown) against a workpiece (such as a chisel or a machete blade) during an abrading operation has serrations on its surface in which the leading faces 23 of the lands 26 are inclined steeply and the trailing faces 24 less steeply. As applied to a backstand abrading arrangement, the support 10 is a wheel rotated to drive an endless abrasive belt. The wheel may be made with a hub 14 of metal, such as steel, cast iron or aluminium, and a serrated rim 18 of metal, such as cast iron, textile material, plastics or rubber. Rubber rims may have a Shore Durometer hardness number between 20 and 100 and be secured to the wheel by an adhesive. The serrated surface of the rim may be produced by securing bars to the circumference of the rim, and the lands may be inclined to the axis of the wheel at an angle between 10 and 85 degrees and may have various curved and straight walls, Figs. 7, 8 and 9 (not shown), with rake angles up to 15 degrees and angles of clearance between 10 and 85 degrees. Slots 39, Fig. 10, may be formed in the lands 38 of a rim of rubber to facilitate flexing. Workpieces having concave or convex surfaces may be abraded by providing lands that have variable flexibility across the width of the rim. This may be achieved by means of a convex or concave surface 42, Fig. 11, on the flange of the wheel 41, diagonal serrations of variable depth across the width of the rim, or by varying the width of the serrations, Figs. 12 and 13 (not shown). In a further embodiment, Fig. 15, the serrations are formed on the rim of an air-inflated rubber tube 49. The serrations may be formed on the rim elements of an expanding pulley, Fig. 16, in which the parts 54 move under centrifugal force to follow the shape ofworkpieces of irregular form. The serrations may also be provided on a driving belt 61, Fig. 18, for the abrasive band 60. The belt 61, which may be backed by a platen 63, may be reinforced internally and have a concave or convex face. The performance of paper bands coated with aluminium oxide and supported according to the invention, in comparison with similar bands supported according the prior art, is tabulated in the Specification.
Patent GB-1177068-A (GB)
Title: Liquid Metal Monitor
Inventor: ROACH PETER FRANCIS
IPC: G01N25/02
Filed: 1966-06-15
Abstract: 1,177,068. Determining impurities in liquid metal, electrically. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. June 1, 1967 [June 15, 1966], No.26762/66. Heading G1N. Apparatus for monitoring a flowing liquid metal e. g. sodium for soluble impurities comprises a duct 12 Fig. 1, an air cooled heat-exchanger 14 with fins 15, an electromagnetic induction pump 18 or alternatively an eddy current brake Fig.3 (not shown), to control the flow-rate of the liquid metal, a thermocouple 19 to measure the metal temperature. The pump 18 comprises magnet poles 22 Fig. 2 and electrical connection terminals 21, brazed to the duct wall. In operation liquid metal flowing along duct 12 is cooled by the heatexchanger 14. Direct current is passed through the liquid metal and duct walls in the direction of arrow 23, and in accordance with Flemings "Motor" Rule an electromagnetic force will be applied to the liquid metal which will oppose the flow thereof. The flow-rate is thereby reduced and precipitated impurity will plate out on to the duct wall at the coolest region near the pump 18, increasing the electrical resistance between terminals 21 and reducing the current flow. Consequently opposition to the liquid metal flow decreases and the flow rate increases. With air flowing through the heatexchanger 14 at a constant rate the increased flowrate of the melt results in an increased amount of heat in the region of terminals 21 so that the plated out impurity tends to dissolve. When conditions are such, after a "hunting" period, that impurity is being neither plated nor re-dissolved, the thermocouple will indicate "Saturation temperature" which can be compared with a relationship showing solubility of impurity in the liquid metal, and so the proportion of impurity in the metal can be determined. A by-pass line 20 is provided so that even if the impedance to fluid-flow is high, between a source pump and the monitor, the electromagnetic pump can easily vary the rate of flow through the monitor. In an alternative embodiment Fig.3 (not shown) a single turn of copper is brazed to the duct walls in place of the terminals 21. Flow of metal through the magnetic field generates a current which flows in the turn 31 causing a force to retard the metal flow in the manner of an eddy current brake.
Patent GB-1062697-A (GB)
Title: Push-pull amplifier stage for two stereophonically related signals
IPC: H03F3/28
Filed: 1964-06-29
Abstract: 1,062,697. Stereophonic systems. TESLA NARODNI PODNIK. June 29, 1964 [June 29, 1963], No. 26789/64. Headings H4J and H4R. A stereophonic amplifier to which two stereophonically related signals L, P are applied comprises two identical triodes V 1 , V 2 , Fig. 3 (or transistors, Fig. 4, not shown). The signal L is applied to triode V 2  in phase opposition to the signal P applied to triode V 1 . The cathodes and anodes of the triodes V 1 , V 2  are so connected to a transformer Tp that, if A is the amplification factor   of each triode; voltages AL/2,   + AP/2, AP/2- and + AL/2 - are   obtained at taps a, b, c and d, respectively. A voltage reference point is obtained by earthing the junction of two identical resistors r 1 , r 2  which are connected to taps S 1 , S 2  of transformer windings N 1  and N 2 . A loud-speaker R l  connected to taps a and d reproduces the L signal and a loudspeaker R p  connected to taps b and c reproduces the P signal. If desired, the taps a, b (or c, d or S 1 , S 2 ) may be connected to a third loud-speaker (not shown) which then reproduces a sum signal (R + L). Negative feedback may be introduced. Fig. 5 shows a circuit using transistors Q 1 , Q 2  in which a sum signal is applied to a central loudspeaker R s . One transformer winding has taps e,f and g, h arranged symmetrically with respect to the centre tap S 2  and by connecting one terminal of each loud-speaker R l , R p  to taps e, f or g, h, the difference component may be varied with corresponding variation of the stereophonic effect. The transistors Q 1 , Q 2  are operated with a sliding working point by providing the transformer Tp with auxiliary windings N 3 , N 4 . The voltages from these windings are rectified by diodes D 1 , D 2  and smoothed by capacitors C 1 , C 2  to vary the bias of the transistors in accordance with the values of the signals P and L. Alternatively the bias may be controlled from a preceding stage.
Patent GB-678386-A (GB)
Title: Self-closing tap for a lubricating oil drum
IPC: F16K21/04
Filed: 1949-10-19
Abstract: 678,386. Tapping casks &c. TRUMEK, Ltd., and NAPIER, J. K. Oct. 17, 1950 [Oct. 19, 1949], No. 26899/49. Class 21. [Also in Group XXIX]. A self-closing tap for an oil drum 21 comprises a tubular body 12 screwed into a socket 20 fixed to the drum and having an outlet 13 formed with a seat 14 engageable by a rubber disc 27 secured between metal discs 25, 26 mounted on an operating spindle 23 and urged by a spring 28 to close the tap. The spindle carries a knob 24 slidable over a guide 22 on the body 12 and a sealing washer 29 urged by the spring 28 into a recess 30. A thick sealing washer 19 enables a leak-proof joint to be made with the tap in its upright position.
Patent GB-412077-A (GB)
Title: Improvements in brackets and holders for electric lamps
IPC: F21V21/02
Filed: 1933-10-02
Abstract: 412,077. Electric-lamp holders. MOULDED PRODUCTS, Ltd., and SANDERS, E. A., 1146, Chester Road, Tyburn, Birmingham. Oct. 2, 1933, No. 26993. [Classes 39 (ii) and 75 (iii).] An electric lamp holder comprises a bracket 1 provided with a hollow arm 2 formed at its projecting end with a vertical passage 3 adapted to receive on one side a lamp socket 4 with a pair of contact plungers 5 connected to conductors 12 extending through the hollow arm, and on the other side a closing-cap 6 to which the insulating body of the lamp socket is secured by screws 7, the arrangement being such that the plug can be arranged at either end of the opening 3 to alter the direction in which the lamp projects. The plungers 5 are pressed downwardly by U-shaped leaf-springs 20, which do not carry current, and are preferably slotted to engage a central pin on the plunger, the other ends of the springs being offset to engage within recesss 29 in the cap 6. The conductors 12 are formed separately from the springs 20 and connected to split terminal-pins 13 to engage sockets 27 in a projecting part 28 of a wall bracket, so that the lamp-holder bracket 1 can be reversed readily relatively to the wall bracket. A switch may be disposed within an aperture 32, which is otherwise closed by a plug 30.
Patent GB-844124-A (GB)
Title: Improvements in or relating to paint and like brushes having bristles anchored in a ferrule
Inventor: HOLDEN WILLIAM JAMES
IPC: A46B15/00
Filed: 1958-08-22
Abstract: 844,124. Brushes, handle fixings. HOLDEN FERRULE CO. Ltd. March 6, 1959 [Aug. 22, 1958], No. 27059/58. Classes 19 and 61. A block 11 of plastics or of a substance, that is uneffected by moisture as regards swelling or shrinkage, is so shaped that it may be inserted in and secured in a ferrule 2 and may have secured to it the end of a handle 5 of a material that is subjected to swelling or shrinking in response to the moisture content of the surroundings. Preferably the handle has a cylindrical spigot 4 or a screw threaded stud at the lower end which mates in a complementary bore or passage in the block. The ferrule and handle may after assembly with the block be nailed thereto. The ferrule may also be crimped into peripheral grooves formed in the sides of the block.
Patent GB-1490839-A (GB)
Title: Method and apparatus for moving a heat treating gas
IPC: F27B17/00
Filed: 1976-06-29
Abstract: 1490839 Heat treatment apparatus ALCO STANDARD CORP 29 June 1976 27090/76 Heading F4B [Also in Division C7] In a heat treatment furnace 10 with a refractory walled enclosure 16 defining a chamber 17 having elements 20 for heating a workload 11, processing gas is admitted through an injector 29 and is withdrawn through a line 31. A pneumatically actuated reciprocating plunger 35 in a compartment 36 imparts a pulsating motion to the processing gas as it passes past the work load towards the point of exit. An additional plunger may be fitted to impart pulsating multi-directional flow to the processing gas (Figs. 3-5). The furnace may be of the vacuum type with a pump 21 to evacuate the interior and with a peripheral water jacket 15. The processing gas may be methane for case hardening the workload by the vacuum carburizing process.
Patent GB-953547-A (GB)
Title: Composition for treating iron and process of using the same
IPC: C22B1/243
Filed: 1960-08-05
Abstract: Molten iron, preferably grey cast iron, is treated by bringing it into contact with a mixture comprising at least 50% of silicon carbide and in excess of 10 parts by weight per 100 parts by weight of pure silicon carbide, of an allkaline modifying agent, such as sodium carbonate, lye, sodium bicarbonate, sodium oxide, potassium carbonate, or lithia, in order to increase the Si pickup by the iron. The mixture may be in the form of a briquette which includes up to 20% by weight of a binder and is added to the charge in a cupola or ladle.  The binder may be an organic pitch such as cellulose sulphite pitch but is preferably an inorganic cement such as Portland and/or magnesium oxychloride cement, hydrated lime or an argillaccous bond; particles of a mineral that exfoliates under heat, such as 0.5-5% by weight of vermiculate based on the briquette, may also be added.  The briquette may be cast from a slurry of the above ingredients including the binder or with only a temporary binder such as lignin derived from cellulose sulphate liquor and thereafter dipped into a cement slurry or sodium silicate solution to harden. U.S.A. Specification 2,497,745 is referred to.
Patent GB-1272999-A (GB)
Title: Tufted carpet
Inventor: HEFTER HANNES
IPC: D05C17/02
Filed: 1969-05-29
Abstract: 1,272,999. Tufted pile fabric. GLANZSTOFF A.G. 29 May, 1969 [30 May, 1968], No. 27289/69. Heading D1K. A tufted fabric comprises a gauze or leno woven backing fabric of synthetic yarns through which are inserted pile threads which are secured to the rear face of the backing by an adhesive layer. The backing may be woven from yarns of polyester, polyamide or polyacrylonitrile and the pile yarns may be of polyamide, polyester or polyacrylate.
Patent GB-724047-A (GB)
Title: Improvements in and relating to variable condensers
IPC: H01G5/12
Filed: 1952-10-30
Abstract: 724,047. Variable condensers. CONTRAVES AKT.-GES. Oct. 30, 1952 [Nov. 1, 1951], No. 27312/52. Class 37. The rotor plate of a condenser and the confronting parallel faces of the stator between which the rotor is disposed, are provided with arcuate ribs concentric with the axis of rotation, the ribs being of rectangular cross-section and those of adjacent rotor and stator faces interlacing. As shown, a spindle 1 carries two rotor plates 2 each having ribs 5, 6 concentric with the spindle 1, the ribs 5 being offset radially relative to the ribs 6 to strengthen the plates. The stator plates 3, 4 are correspondingly ribbed at 7, 8. The axial air-gap, Fig. 2 (not shown), between the ribs is made greater than the radial airgap. The rotor plates are preferably shaped as shown in Fig. 3 and the ribs at the edges 14 are chamfered, Fig. 4 (not shown), to reduce distortion of the displacement. capacity curve which may be a sine or cosine curve. By offsetting the two rotor plates 90 degrees relative to each other, both sine and cosine functions can be represented, and by dividing each stator into four similar quadrantshaped parts, the condenser may be used to represent sums and differences of these functions.
Patent GB-1492092-A (GB)
Title: Method and apparatus for sintering plastics coatings applied to articles
IPC: B05D1/06
Filed: 1976-06-03
Abstract: 1492092 Coating materials with plastics PLASTIC COATINGS Ltd 3 June 1976 [27 June 1975] 27395/75 Heading F4B [Also in Division B2] A plastics coating on the surface of an article is sintered by supporting the article on a surface of a conveyer 10, passing the conveyer through a sintering zone 16 to sinter the coating except for that portion adjacent the conveyer, which portion is kept below its flow temperature, supporting the article on a conveyer 11 so that the portion of the article adjacent the conveyer is a sintered portion, and passing the article again through a sintering zone to sinter the remaining unsintered portion of coating whilst ensuring that the already sintered portion does not reach its flow temperature. Magnetizable articles from shoot 18 fall on to conveyer 10 and their plastics powder coating is sintered by infrared heater 13, whilst the coated base of the articles is prevented from reaching the flow temperature by water-cooled contact plate 15; forced air cooling follows at 14 and the articles pass round magnetic drum 12 so that they are delivered to conveyer 11 inverted, with the unsintered powder uppermost; this is sintered by repetition of the above-described steps. In another embodiment, only one sintering zone is used, with a conveyer either side of it; one half of an article is sintered whilst held on the lefthand conveyer; the article is shifted laterally to be held on the right-hand conveyer, and the other half sintered as that conveyer travels in the return direction. In the above illustrated embodiment, if the articles are not magnetizable, a belt is used to trap them against drum 12 and thus to invert them (Fig. 4, not shown).
Patent GB-1244440-A (GB)
Title: Improvements in or relating to control of video signal levels
Inventor: THOMMEN WERNER
IPC: H04N7/14
Filed: 1969-05-30
Abstract: 1,244,440. Automatic regulation of video signals. WESTERN ELECTRIC CO. Inc. 30 May, 1969 [5 June, 1968], No. 27429/69. Heading H4F. A control system for the automatic regulation of a video output signal, e.g. in a video telephone transmitter, includes an image pick-up tube 11, a variable gain amplifier 17 for the video signal, a variable aperture iris 13 for adjusting the intensity of light falling on the tube 11, and control means for controlling the video output signal at terminal 24 by adjusting the aperture of iris 13 for high illumination intensities and by varying the gain of the amplifier 17 for low illumination intensities. The control means includes, in the embodiment, a signal analyser 20 which obtains a D.C. signal indicative of the video output signal amplitude, a comparator 21 for comparing this D.C. signal with a D.C. reference, and a control network 18. The gain control of the amplifier 17 and the drive 25 for the iris 13 may be adjusted to respond to mutually exclusive ranges of control voltage from the network 18. Preferably the low illumination intensity range, in which the variable gain of the amplifier 17 provides the automatic gain control, extends up to the level beyond which further increases in illumination level do not significantly improve the quality of the picture represented by the video output signal. A control signal may be applied to the signal analyser 20 so that the comparator 21 only samples the central portion of each frame, the upper and lower 25% of the frame, which are likely to include unrepresentatively bright areas, being disregarded in determining the control voltage from the network 18.
Patent GB-225837-A (GB)
Title: Continuous furnace for glass manufacture
IPC: C03B5/04
Filed: 1924-11-17
Abstract: 225,837. Manufactures des Glaces et Produits Chimiques de St. Gobain, Chauny, et Cirey. Dec. 6, 1923, [Convention date]. Glass furnaces.-In a continuous glass-making furnace the melting chamber A and the fining- chamber E, which are distinct and independently heated and are connected by a channel D electrically heated, are arranged in separate blocks of masonry so as to be completely independent of one another, e.g. as regards temperature. In the form shown, a number of melting chambers are each connected by a passage D with a single fining chamber E, from which the glass flows, under a water-cooled bridge G to the gathering tank. The chambers A and passages D are heated electrically, e.g. by resistances or induction currents as indicated diagrammatically at M, but the chamber E by ordinary means. In a modification, the fining chamber is subject to reduced air pressure to cause the removal of gas bubbles from the glass, and is connected by passages to a number of gathering tanks as described in Specification 225,211. The Specification as open to inspection under Sect. 91 (3) (a) states that melting and fining may be carried out in one and the same chamber. This subject-matter does not appear in the Specification as accepted.
Patent GB-304343-A (GB)
Title: Improvements in the production of liquid hydrocarbons by the carbonisation and hydrogenation of carbonaceous materials
IPC: C10G1/06
Filed: 1927-10-17
Abstract: 304,343. Johnson, J. Y., (I. G. Farbenindustrie Akt.-Ges.). Oct. 17, 1927. Carbonizing processes. - In the production of hydrocarbons of low boiling point by the low temperature carbonization of materials containing bitumen in the presence of scavenging gases, the gases and vapours are maintained at a higher rate of flow in the reaction space than they would have by being merely passed through the reaction chamber. The increased flow is obtained either by setting up a pulsating or oscillating movement or the gases in the reaction space or by repeatedly circulating the gases in the reaction chamber through the reaction space. Gases, e.g. hydrogen, are circulated by a pump a through a reaction chamber h containing a catalyst, a condenser d and a stripping vessel e. A piston g is reciprocated in the chamber k and imparts an oscillatory movement to the gases and vapours. In the modification shown in Fig. 2, a valveless piston g having a higher effectiveness than the pump i is reciprocated in a reaction space b bounded by a cylindrical mantel c, and thus a circulation of the gases between the reaction space b and the annular space k formed between the mantel c and the walls of the vessel k is obtained.
Patent GB-256828-A (GB)
Title: Improvements in or relating to wireless telegraphy and telephony
IPC: H04B1/54
Filed: 1925-11-02
Abstract: 256,828. Soc. Anon. des Ondes Dirigees, and Brard, E. Nov. 2, 1925. Combined transmitting and receiving arrangements; keying and modulating systems.-In a system for communicating between two stations only one of which has a source of power, one station E comprises a transmitting-circuit 2, 3, 4, 5, 6, 12, and the other station R comprises a receiving-circuit 7<1>, 8<1> tuned to the first station and a key or microphone 9<1> for modulating the received current. The, modulated currents produce signals in the receiving circuit at station E, which are amplified by an amplifier 9.
Patent GB-999839-A (GB)
Title: A combined lifting and transporting jack
Inventor: CHAMPION STEWART
IPC: B62B1/08
Filed: 1963-07-11
Abstract: 999,839. Lifting jacks. SCAFFOLDING (GREAT BRITAIN) Ltd. July 8, 1964 [July 11, 1963], No. 27557/63. Heading B8J. A lever jack comprises a tube 1 with a pair of wheels 2 supported one on each side thereof just behind an upwardly-turned forward end portion 3 arranged to be slipped under an element 20 of a structure to be moved, a spigot 7 limiting the depth of insertion. The outer end of the jack may be depressed to raise the element 20 and a cranked plate 5 on a sleeve 4 sliding on the tube 1 engaged under another element 21 of the structure to be moved and retained by a set-screw 6. Any required number of jacks may be used in effect providing detachable wheels. A free-hanging chain 8 may be used with each jack to associate it captively with the structure to be moved by passing it round a member 22.
Patent GB-1517191-A (GB)
Title: Over-voltage protection for dc transmission line systems
IPC: H02H7/127
Filed: 1975-07-01
Abstract: 1517191 Protecting converters VSES ELEKTORTEKHN INST IM VI LENINA 1 July 1975 27623/75 Heading H2F A high voltage D.C. transmission system includes an A.C. to D.C. converter 1 and an over-voltage protection arrangement comprising a surge arrester 4, a current limiting resistor 5 and a current sensor 6, the application of a firing pulse or pulses to the converter being suppressed for the duration that current is sensed by the sensor so that the output voltage of the converter is reduced, following an overvoltage, for a period sufficient to allow the surger arrester to recover. A control circuit 13, which includes a pulse source 9, a shaping circuit 10, a comparator 11 and an amplifier 12, supplies firing pulses to the controlled rectifiers in the converter 1. If an over-voltage is detected by a sensor 6, a pulse generator 7 and a shaping circuit 8 supply a pulse to the comparator 11 which blocks the supply of firing pulses to the converter for the duration of the pulse from the circuit 8.