baber/WOPTO huggingface dataset:
Patent GB-1512788-A (GB)
Title: Gyromagnetic compass systems
IPC: G01C25/00
Filed: 1975-08-06
Abstract: 1512788 Automatic control of gyroscopes SPERRY RAND CORP 6 Aug 1975 [19 Aug 1974] 32827/75 Heading G3R In a gyromagnetic compass system, the azimuthal position of the gyroscope is controlled by a torque motor in response to an error signal derived by a synchro coupled between the gyroscope and a flux valve which detects magnetic meridian data. A threshold device is responsive to gyroscope rotor speed above a pre-set value to limit the torque motor drive signal, and the threshold device is inhibited by a null detector until the drive signal is below another pre-set value, indicating approximate synchronism of the gyroscope and flux valve. As shown, a gyroscope 11 on an aircraft has a rotor 24 driven by an induction motor 12 and connected through a synchro 13 with a conventional flux valve 14. A winding 25 produces a slaving error signal which is amplified 82 and demodulated by a double frequency circuit 87-109 responsive to an AC source 40 which also supplies the motor 12 and the flux valve 14. The demodulated error signal is then coupled to a display device 131 and a high gain feedback amplifier 113 which drives transistors 125,126 to produce a drive signal for a torque motor 15 which sets the gyroscope azimuth. When power is first switched on, a capacitor 111  produces a large pulse voltage which causes the motor 15 to move the gyroscope away from its initial position to prevent stabilization at a false position 180 degrees from the correct attitude. A threshold detector circuit 58 receives a signal on lead 46 representing the rotor speed. When a given speed is reached, a transistor 61 is turned on, and a winding 63 is energized, causing contacts 123 to close and thus limit the gain of the amplifier 113, so that the drive of torque motor 15 is at a low level when full rotor speed is achieved under normal conditions. At start-up, the drive signal produced by transistors 125, 126 is large, and causes a diac 67 to trigger a triac 66, thereby disabling the threshold circuit 58 and ensuring that the drive signal to the torque motor 15 remains at a high level until substantial synchronism is achieved, irrespective of the rotor speed. When synchronism is close, the output of transistors 125, 126 falls to a low level, so that the diac 67 blocks and the triac 66 turns off, allowing the threshold circuit 58 to operate normally. If desired, the aircraft pilot can operate a manual switch 72 which disables the circuit 58 and allows manual synchronization at a high level of torque motor drive.
Patent GB-1003733-A (GB)
Title: Improvements relating to lawn mowers
Inventor: SOUTHALL PHILIP READHEAD
IPC: A01D34/42
Filed: 1963-08-20
Abstract: 1,003,733. Lawnmowers. H. C. WEBB & CO. Ltd. Aug.19, 1964 [Aug. 20, 1963], No.32840/63. Heading A1F. A motor lawnmower which is controllable by an operator, either walking behind the mower or riding on a towed trailer 14, has steering-control handles 20 which are adjustable between limiting positions, one a forward position immediately above the rear of the mower body (full lines), and the other a rearward position spaced well to the rear of the body (dotted lines). The trailer 14 carries a seat 15 and is attached to the rear of the mower by a telescopic tow-bar 44. The handles include fixed rearwardly-convergent arcuate bars 17 between which are slidable two parallel arcuate bars 22 united at their front ends by a box 24 and towards their rear ends by a spacer, the extreme outer ends forming handlebars 21 which carry throttle and clutch control-levers 35. The two sets of bars 17, 22 are clamped together adjustably by a clamp 26. The rear bar of the mower Fig. 6 (not shown) may carry foot-rests.
Patent GB-1477491-A (GB)
Title: Gray iron casting and method of controlling the carbide  content thereof
IPC: C22C37/06
Filed: 1974-07-25
Abstract: 1477491 Grey iron casting CATERPILLAR TRACTOR CO 25 July 1974 [1 Oct 1973] 32861/74 Heading C7A A grey iron casting of composition:- C 3À1 to 3À45% Si 1À6 to 1À7% Cr 0À6 to 0À8% Mn 0À4 to 0À9% Mo Trace up to 0À4% Fe plus impurities Balance wherein maximum amount of individual impurities is 0À2% and having a carbide content of 20 to 40 volume % in a pre-selected region with the remainder of the casting being generally more pearlitic and graphitic. The casting may be a cam-shaft in which the cam lobe contains the specified carbide content which is obtained by controlled cooling of the lobe portion and the body of the cam-shaft is more pearlitic and graphitic than the cam lobe.
Patent GB-508368-A (GB)
Title: An improved form of sketching board or portable drawing board
IPC: B43L5/02
Filed: 1937-11-29
Abstract: 508,368. Drawing-boards. HARBER, F. C. R. Nov. 29, 1937, No. 32881. [Class 11] A portable drawing-board suitable for use in wet or dirty situations has a removable cover of celluloid &c. by means of which sketches or notes may be made indirectly upon a sheet of semi-transparent paper or cloth placed beneath the celluloid with the aid of a sheet of carbon paper located underneath the paper or cloth. Impressions made on the celluloid with a pencil or style are thus recorded by the carbon paper on the underside of the drawing-sheet. The celluloid sheet d, Fig. 3, is fixed at one end to the underside of the board a, and the other end is held down by a clip f. Compressible material, such as a rubber tube g, may be employed to keep the celluloid taut. The three sheets are protected along their edges by a flanged plate h, Fig. 2, and a wood or metal strip j. A longer drawing-sheet may be carried on spools l, Fig. 7, and wound from one to the other by means of knobs. The spools are contained in a box o, the bottom n of which is removable to allow the spools and the drawing-board a to be taken out, the celluloid cover d remaining fixed to the ends of the box. '
Patent GB-1403571-A (GB)
Title: Method and arrangement for sorting record units having keyfield  bits arranged in descending order of significance without  comparator
IPC: G06F7/24
Filed: 1972-07-13
Abstract: 1403571 Data sorting system DIRKS ELECTRONICS CORP 13 July 1972 [13 July 1971] 32910/72 Heading G4M A data sorting system applies identifying addresses to a plurality of words containing a key field and transfers words containing the addresses between two stores to locations depending on successive bit values of the key fields. The bits of the key fields which may be stored in a circulating store are examined successively commencing with the most significant bit and the addresses are stored in store B in locations determined by the value of the key field bit i.e. the addresses for words having a key field bit of "0" are stored in successive locations starting at a first "0" location and the other addresses are stored in successive locations starting at a first "1" location. The addresses are then transferred to store A to locations determined by the second most significant bits of the keyword, commencing with the addresses in the "0" storage locations. A group number is associated with the address from the "1" location of the B store and is a "1" to distinguish the numbers in the tree of Fig. 2 which branch from the first "1" location. The numbers in the "0" storage location are then read back to store B followed by the numbers in the "1" location which have a zero group number and then by the numbers which have a "1" group number and are stored in the appropriate "0" or "1" locations. Addresses from the "1" location of store A have their group number incremented by one. This proceeds until the least significant digit of the keyfield has been read when the numbers are in the desired order. During each transfer addresses are read out in increasing order of their group number to identify (in Fig. 2) from which point in the tree they have branched. The group numbers against the letters k to t correspond to a sort on the binary digits representing the numbers 0, 1, 2, 3, 4, 5, 8, 9, 10, 11.
Patent GB-469001-A (GB)
Title: Process of and apparatus for recovering solvents from the outgoing air of lacquer spraying devices
IPC: B05B14/43
Filed: 1936-12-03
Abstract: 469,001. Filtering gases. CARBONORIT - UNION VERWALTUNGS - GES. Dec. 3, 1936, No. 33197. Convention date, Jan. 29. [Class 8 (ii)] Solvent-laden air from a lacquer-spraying cabinet passes through a filter 5 of peat wool before entering a solvent recovery device 3 employing, e.g. activated carbon ; a coarse filter 4 of wood wool, metal shavings &c. may precede the peat wool filter.
Patent GB-785955-A (GB)
Title: Improvements relating to axial-flow air compressors
IPC: F04D27/02
Filed: 1955-11-21
Abstract: 785,955. Axial-flow compressors. GENERAL MOTORS CORPORATION. Nov. 21, 1955 [Dec. 3, 1954], No. 33245/55. Class 110 (1). An axial-flow air compressor comprises a circumferentially extending row of air-bleed apertures, and a slide valve member made of flexible metal strip slidable in the circumferential direction to open or close the apertures. In a multi-stage axial-flow compressor forming part of a gas turbine plant, air is bled from an intermediate stage during starting and low-speed operation through holes 38 in stator vane shroud strips 32 and thence through ports 46 in outer casing sections 22 to atmosphere. The bleed is controlled by a valve comprising flexible arcuate strips 48 formed with valve ports 50. The strips 32 and 48 and the casing sections 22 are of quadrantal form, and there are four of each to form a complete annular assembly. The shroud strips 32 are attached to the sections 22 by tongue-and-groove connections 40, 42, and the valve strips 48 are circumferentially slidable in the spaces between the casing sections 22 and the shroud strips 32 to open or close the ports 46. Each valve strip 48 is moved by a rack 52 which engages it by means of a pin 58 and is actuated by a worm 56, the four worms being interconnected for simultaneous operation by flexible cables 60.
Patent GB-486595-A (GB)
Title: Improvements in process of preparing coal for shipment
IPC: B03B1/00
Filed: 1936-12-04
Abstract: 486,595. Washing coal. KNIGHT, C. S., and MUMMA, M. C. Dec. 4, 1936, No. 33347. [Class 82 (ii)] To prepare coal for shipment, the mined coal after being broken into lumps and while in relatively dry condition. is sprayed with oil, paraffin, by-product tar, or like waterrepellent liquid and washed by agitation with water to remove slate, bone, and part of the fines. The adhering water is then drained off the washed coal which includes a part of the fines. The oil increases the efficiency of separation in the washer, causes a considerable quantity of the fines to adhere to the lump coal, and also prevents wetting of the coal to a large extent, thus facilitating the removal of the wash water and leaving a clean coal of low moisture content. The coal from the breakers is sprayed with oil &c. at 13 while tumbling from a screen 10 to a shoot 11 leading to the washer 12. The washed coal passes down a drainage screen 17 into a shoot 20 terminating in outlets 21, 22, the direction of the coal being determined by the position of a pivoted closure member. The slate, bone, &c., pass from the bottom of the washer 12 to a settling tank or the like, to which the drainings from the screen 17 are also led by troughs 18, 19. The slate and bone settle in the tank while the oil-coated fines rise to the surface and may be recovered, e.g. for briquetting.
Patent GB-471712-A (GB)
Title: Improvements in or relating to cupping or drawing presses
IPC: B21D24/02
Filed: 1936-12-04
Abstract: 471,712. Cupping. ERNST, W. Dec. 4, 1936, No. 33359. Convention date, April 16. [Class 83 (iv)] A cupping-press operated hydraulically comprises a main plunger 20, a cross-head 16 connected thereto, a forming plunger 63, and an assembly of plungers 65, mounted on the cross-head for actuating the work holder 87. A valve 22 which admits pressure fluid into a cylinder 21 during the descent of the plunger is described in U.S.A. Specification 1,892,568. A fixed die 57 is arranged under the forming plunger and the work 60 is partly supported therein by a shaped end 59 of a hydraulically operated plunger 48. A tank 28 surrounding the cylinder 21 provides fluid through the valve 22 or through a pipe 29 connected to the middle chamber 30 of a make-up valve 31, the end chambers of which are connected respectively to pipes 26, 24 and pipes 37, 38. The latter pair lead to a pump 39 with a servomotor 40 preferably controlled manually by a valve 41, and hand lever or automatically. Pressure is supplied to the servomotor by a low pressure pump 45. A relief valve 46 is provided for the pump 45, and is disclosed inU.S.A. Specification 1,861,116. A valve 90 is operated by a rod 91 through the medium of an arm 18 on the cross-head 16 which engages a spring pressed cushion 94 below a collar 93 adjustably mounted on the rod 91. Movement of the rod 91 upwardly opens the valve 90 and allows fluid from the pipe 38, through a pipe 95, pipe 96, check valve 97, into a cylinder 47, so that the work-supporting plunger 48 serves as an ejector. In operation the plunger 19 descends by gravity and the pump 39 is started. Fluid is drawn in through the valve 22 from the tank 28 to increase the speed of the descent. When the work holder 87 engages the work the plunger 63 continues its descent and a pressure is built up in the cylinder by the operation of the pump 39. Pressure is also built up in the cylinders of the clamping plungers 65, a check valve 76 being closed. A relief valve 80 previously set allows of escape of fluid if necessary. The forcing of the work blank against the plunger 48 builds up a reacting pressure and prevents the plunger 63 from piercing the work. This pressure is proportional to the main drawing pressure and can be varied by adjustment of a valve 62. The work may be, as shown, a concave blank, previously operated upon, or a flat plate.
Patent GB-707734-A (GB)
Title: A hydraulic governor or regulator, more particularly suitable for adjusting the delivery of fuel injection pumps of compression ignition engines
IPC: F02D1/00
Filed: 1949-12-30
Abstract: 707,734. Engine stop gear. FIAT SOC. PER AZIONI. Dec. 30, 1949 [April 1, 1949; May 7, 1949], Nos. 33396/49.and 33397/49. Class 122(4) [Also in Group XXIX] In a hydraulic-pressure servomotor system for regulating the speed of a compression-ignition engine having an engine driven governor pump 1. Fig. 12, a leak-off piston valve 19, a manuallyadjustable throttle 6 and a spring-loaded servomotor piston 12 operatively connected through a rack 14 to the fuel injection pump, an emergency cut-off valve 119 disposed in the fuel line between the reservoir and the injection pump is held in its open position by governor pump delivery pressure and closes should the governor pump fail to cut off the supply of fuel to the injection pump. In another arrangement, an emergency cut-off valve 108. Fig 11, disposed in the fuel line to the injection pump may be closed by hand through levers and links 116, 117. 113 or by an electromagnet 111 which may be remotely controlled by a switch 112.
Patent GB-1015244-A (GB)
Title: Photographic cameras
IPC: G03B9/70
Filed: 1962-06-12
Abstract: 1, 015, 244. Photographic cameras; exposure control. EASTMAN KODAK CO. June 12, 1962 [May 7, 1962], No. 33492/65. [Divided out of 1,015,243]. Heading G2A. The multi-speed shutter of Specification 1,015,243 is described and claimed without reference to the flash signal and two-speed shutter disclosed therein. The main claim is directed to exposure regulating means, rather than a shutter, adjustable to a plurality of positions including one for flash by regulating means which may be overridden by a manually operable member movable between two positions, one adjusting the regulating means relative to the manually operable member and the other restoring the connection between said regulating means and the manually operable member.
Patent GB-1406366-A (GB)
Title: Digital electronic timepieces
IPC: G04G5/00
Filed: 1973-07-13
Abstract: 1406366 Electronic watches SUWA SEIKOSHA KK 13 July 1973 [31 July 1972] 33527/73 Heading G3T In a digital electronic watch (e.g. using liquid crystal display), to prevent interference by faulty contacts of mechanical switches upon the normal running of the watch, the time-correcting switches 6, Fig. 6, and a safety switch 7 (which must be operated before the correction switches are effective) are not connected directly to a frequency divider and distributer circuit 3 but are connected via a control circuit 12. The switches 6 for hours, minutes, seconds correction respectively, are connected to inputs 1, 2 and 3, Fig. 8, of circuit 12, the outputs of which are connected to the circuit 3. When time is to be corrected, a signal is applied via switch 7 to cause the control circuit 12 to connect the time-correcting switches to the divider/distributer circuit 3. During normal running of the watch the safety switch armature contacts the earthed contact and the outputs of the correction switches are thereby earthed. The watch may comprise a quartz crystal controlled oscillator followed by a C-MOS divider circuit, and a C-MOS divider distributer circuit.
Patent GB-934376-A (GB)
Title: Improvements in or relating to new quaternary ammonium pentaborate compounds and processes for their manufacture
IPC: C07F5/05
Filed: 1960-09-30
Abstract: The invention comprises quaternary ammonium pentaborates wherein the quaternary ammonium ion has the formula <FORM:0934376/IV(a)/1> where each of the four R radicals represents any organic radical and the borate ion has five boron atoms for each quaternary ammonium ion, ie., H4B5O10.  Specified compounds are tetramethyl ammonium-, tetraethyl ammonium-, tetraallyl ammonium-, allyl dimethyl anilinium and fluorenyl trimethyl ammonium pentaborate.  The novel compounds may be made by reaction between a quaternary ammonium hydroxide and ammonium pentaborate in equimolar quantities in aqueous solution. Alternatively a quaternary ammonium halide in aqueous solution is treated with silver oxide and the silver halide precipitate is removed, five moles of boric acid are added for each quaternary ammonium ion, and after mixing water is removed under vacuum and the quaternary ammonium pentaborate is recrystallised from water.
Patent GB-1519976-A (GB)
Title: Dosimeters
IPC: G01T1/02
Filed: 1975-08-13
Abstract: 1519976 Radiation dosimeters WISCONSIN ALUMNI RESEARCH FOUNDATION 13 Aug 1975 [16 Aug 1974] 33733/75 Heading H1K [Also in Division H5] A radiation dosimeter comprises a dielectric material positioned between electrodes, the dielectric material being one in which at a temperature of 120-130‹ above that for a radiation induced thermally activated current peak and an applied field of 300 to 500 volts per millimeter, the ionic current does not exceed 10<SP>-12</SP> amperes per cm<SP>2</SP>. The level of active impurities in the dielectric material should preferably total not more than 50 p.p.m. Specified dielectric materials are BeO, MgO, Al 2 O 3  and La 2 O 3 . The Al 2 O 3  may be in the form of sapphire.
Patent GB-380660-A (GB)
Title: Improvements in and relating to shaft bearings
IPC: F16C33/10
Filed: 1931-12-05
Abstract: 380,660. Lubricating bearings. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A. -(Assignees of Allgemeine Elektricitõts- Ges. ; 2, Friedrich Karl-Ufer, Berlin.) Dec. 5, 1931, No. 33787. Convention date, Dec. 5, 1930. [Class 12 (ii).] The surface of a shaft journalled in a bush 12 is formed with mutually-separate wedge-shaped recesses 11 so as to produce pressure-film lubrication, the recesses being of shorter length than the bush. For a shaft adapted to rotate in both directions, the recesses are of double wedge form, as shown in Fig. 3. The recesses may extend parallel to the shaft axis or may be formed as shown in Fig. 2. Oil may be supplied to an axial groove in the bush, or may be fed to the shaft by a loose ring 15, Fig. 6, running on a central uninterrupted part 17 of the shaft, or may be supplied through passages 19, 20, Figs. 7 and 8, in the shaft. In the latter case, the ends of the upper unloaded part of the bush are chamfered at 22, 23 so as to expose the ends of the recesses, whereby a continuous circulation of oil may be effected. The same effect may be attained by supplying the oil to a semi-annular groove in the unloaded part of the bush. The recesses 11 may be produced by means of a cylindrical cutting or grinding tool 33, Fig. 9, rotating about an axis parallel to the shaft axis and fed along an arc 34, the radius of which is equal to the sum of the radii of the shaft and tool and the centre 36 of which is displaced slightly from the shaft centre. For producing the recesses shown in Fig. 3, the tool is fed along an arc the centre 361 of which lies beyond the shaft centre and on the diameter passing through the deepest part of the recess. Alternatively, a tool 39 rotating about an axis at right-angles to the shaft axis and having a profile corresponding to the shaft curvature may be used, the tool being fed along the shaft. Specification 295,405, [Class 12 (ii), Lubricating passages &c.], is referred to. The Specification as open to inspection under Sect. 91 (3) (a) states that recesses may be formed in the bush instead of in the shaft. This subject-matter does not appear in the Specification as accepted.
Patent GB-1404752-A (GB)
Title: Wear-resistant articles of hard material
IPC: B22F7/02
Filed: 1971-07-19
Abstract: 1404752 Coated sintered cemented carbide HOY CARBIDES Ltd 19 July 1972 [19 July 1971] 33837/71 Heading C7D A wear resistant article such as a cutting tool tip comprises a body of cobalt cemented tungsten carbide coated with an outer layer of cobalt. The cobalt layer 0.01 "thick may be applied by painting with a slurry of cobalt flake or powder in a volatile solvent and then sintering. Other coating methods such as electroless deposition, hydrogen precipitation from aqueous solution, sputtering, flame spraying or vapour phase deposition from a volatile compound. After coating the article is heated to effect diffusion.
Patent GB-747360-A (GB)
Title: Improvements in or relating to electric contact converting arrangements
IPC: H02M1/26
Filed: 1953-12-04
Abstract: 747,360. Rectifying; automatic current control systems. SIEMENS-SCHUCKERTWERKE AKT.-GES. Dec. 4, 1953 [Dec. 5, 1952], No. 33838/53. Classes 38 (2) and 38 (4). Sharing of the load carried by two contact converter systems connected in parallel is automatically controlled by a load operated regulator. A D.C. line PN is supplied from 3- phase A.C. supply through two 3-phase bridgeconnected converter systems I, II having contacts 13 with switching chokes 12 in series. Each choke 12 has a contact opening step control winding 15 energized from auxiliary supply 20 through rectifiers 33, smoothing choke 35 and control resistor 34, and a contact closing step control winding 14 supplied from the auxiliary source 20 through rectifiers 32 and main and additional regulators 24, 25. Alteration of the values of these regulators varies the length of the contact closing current step and hence the time at which commutation effectively begins, and therefore the output voltage. The main regulators are set so that the load is shared between the two systems equally or otherwise, according to their ratings, and their values are altered together to keep the total load constant by a motor 23 controlled by a signal from current transformers 21, 22 energized by the load carried by system II. To maintain the sharing at its set value during operation, regulators 25 are altered together but in opposite directions by a motor 26 controlled by a switch 27. This switch moves in one direction or the other according to the values of currents in its two windings. These currents are derived through rectifiers 31 from current transformers 21 in the two systems, and are also those which pass through windings 29 to produce M.M.F.'s in cores 28 which are balanced against those produced by windings carrying the D.C. output currents of the systems. Unbalance of these M.M.F.'s due to backfire energizes trip coils 30. Each regulator 24 operates in steps, and the total value of each resistor 25 may be equal to that of one step.