baber/WOPTO huggingface dataset:
Patent GB-1123529-A (GB)
Title: Electric motor control systems
IPC: H02P7/292
Filed: 1967-04-14
Abstract: 1,123,529. Control of D.C. motors. DODGE MFG. CORP. 14 April, 1967 [28 June, 1966], No. 17281/67. Heading H2J. [Also in Division H3] A silicon controlled rectifier 22 in series with motor 12 has a firing circuit comprising magnetic amplifier 24 which is supplied from tapped transformer 25 and is provided with load windings 30, 32, control winding 36, and damping winding 38. Resistor-diode networks are connected between points 112, 116, and 110, 114, to allow for the flow of resetting currents during alternate half-cycles of the source voltage, thus dispensing with a bias winding for this purpose. A current passing through resistor 108 and diode 104, for example, desaturates core 40 after load current has ceased to pass through the winding 30. The energization of winding 36 is controlled by speed-limiting rheostat 52 associated with a smoothing capacitor 58 and speed-control potentiometer 54. A transistor 70 is rendered conductive to divert current from the winding 36 when a signal representing the armature current overcomes a referance potential applied to the base of the transistor. The speed of the motor is stabilized by means of resistor 82 in the armature circuit, which, when the load increases, adds to the signal derived from potentiometer 54, thus increasing the armature current. Potentiometer 84 compensates for IR drop in the armature, and resistor 88 provides dynamic braking. In another arrangement, the damper winding 38 operates to reset the core 42, whilst resistor 108 and diode 104 maintain the saturation of the core 40 at the proper level. In a further embodiment, the resistor-diode networks for resetting the magnetic amplifier are connected each to an intermediate tapping on the transformer, no damper winding being provided.
Patent GB-852561-A (GB)
Title: Improvements in or relating to process and apparatus for the preparation of worts
Inventor: COOK ARTHUR HERBERT
IPC: C12C7/06
Filed: 1958-05-30
Abstract: 852,561. Filters ; gravity-separation apparatus. BREWING PATENTS Ltd. May 28, 1959 [May 30, 1958], No. 17319/58. Class 46. [Also in Group VI] Apparatus for the preparation of worts from mash and water comprises a vertical vessel 1 of circular cross-section, an axially mounted motor 7 carrying a plurality of vanes 8 adapted to seal against the side wall and floor of the vessel so as to divide it into a plurality of separated mash-receiving compartments, and means 16 for feeding mash into the top of the vessel at a position over an imperforated section of the floor, the floor of the vessel having in successive angular positions an imperforated section 3, perforated filtering sections 4, 5 and a discharge section 6, and the rotor rotating in such direction as to carry the mash successively over the imperforate section and the perforated sections to the discharge section, at least one inert collecting tank 11 being provided under the perforated section of the floor. The mash is held over the imperforate section 3 for settlement of the spent grains to form a filter bed; the temperature may be kept substantially constant, or raised or lowered, by heat exchange from a jacket 2, or alternatively the temperature of the mash may be slowly raised in its passage from the entry point to the commencement of separation of the wort from the spent grain by division of the jacket into separate sections. During the separation of wort, the grains are sprayed from arms 15 with water, or with reheated or boiled weaker wort collected downstream from the spraying. The perforated and imperforate sections of the floor are built from interchangeable slotted and plain plates respectively, so that the relative areas of these sections may be varied in conjunction with the speed of the rotor.
Patent GB-212811-A (GB)
Title: Improvements in the electrical precipitation of suspended particles from gaseous fluids
IPC: B03C3/38
Filed: 1923-07-04
Abstract: In the electric precipitation of dust &c. from waste gases from converters, blast-furnaces, &c., by means of a discharge electrode and a collecting electrode of extended surface, the gas is first treated in such a way that only electric charges of the same polarity as the discharge electrode remain in the gas entering the precipitator.  This polarity is usually negative. The gas may be passed over heated bodies which are either earthed or charged with the desired polarity, so that existing undesired charges are eliminated or are neutralized by the addition of opposite charges. Alternatively the neutralizing charge may be imparted to an auxiliary gas current which is introduced into the main current by a branch pipe maintained at a high temperature. Intimate contact between the gas and the incandescent material is necessary, unless the potential difference is sufficiently high to produce a luminous discharge.  The distance between the electrodes of the precipitation may progressively decrease from the inlet to the outlet.
Patent GB-477157-A (GB)
Title: Improvements relating to electrical transmission-line insulators
IPC: H01B17/34
Filed: 1936-06-22
Abstract: 477,157. Insulators. BURNIER, C. A. (Somerville, J. M.) June 22, 1936, No. 17350. [Class 36] A suspension or strain insulator, more particularly of the pin-and-cap type, comprises an insulator body consisting of upstanding boss and rim portions 1, 2 which are spaced apart to form a deep annular oil channel 3. To protect the oil from contamination a downwardly directed metal shield 11 may be arranged over the insulator, the edge of the shield extending below the preferably bevelled edge 12 of the rim portion. When the insulators are used in chain form a metal shield may be arranged over each insulator, or the insulators may each be formed with a skirt which is adapted to protect the oil trough of the adjacent lower insulator in the chain, the uppermost insulator being protected by a metal shield.
Patent GB-685905-A (GB)
Title: Improvements in or relating to a machine for producing flexible tubing
IPC: B21C37/12
Filed: 1951-07-23
Abstract: 685,905. Coiling. BORNAND, R. July 23, 1951 [July 27, 1950], No. 17428/51. Class 83 (iv). [Also in Group XXVIII] In a machine for making flexible tubes from strip metal, paper, plastic, &c., the strip reels are mounted coaxially.in a rotary cage on the axis of the winding head. The strip is drawn tangentially from the reels and is deflected by rolls to the winding head. Reels 9 mounted in a cage 3 by bearings 13 or rolls 12 carry a brake disc 101 engaged by a shoe 16 adjusted during winding by screw mechanism 18 through cables 24. Guide rolls 30 on the cage deflect the strip 17 to a roll 32 adjustable by a shaft 39 and a pivot 37 and passes it to a winding bead A of known form. The main shaft 61 is rotated by a belt 62 and drives through a gear 65 the body 4. A pulley 66 rotates the tool head A and a pinion 67 rotates a gear 70 on the cage 3. The pinion 70 also rotates a sprocket 73 on the winding shaft 47. In order to prevent damage to lead covered metal strip when sliding diagonally on the deflecting rolls the latter may be made in two or more parts. The roll in Fig. 3 is made in parts 82, 83, movable axially on a shaft 81 against the urge of springs 82a, 83a. In modifications, Fig. 4, 5 (not shown), cam or belt means may be used for restoring the position of the roller part not in contact with the strip.
Patent GB-432146-A (GB)
Title: Improvements in or relating to hydraulic tipping mechanism for vehicles
IPC: B60P1/16
Filed: 1934-06-13
Abstract: 432,146. Tipping vehicles. SUNSALOON BODIES, Ltd., and PEARSON, D. A., Weston Road, Greet, Birmingham. June 13, 1934, No. 17438. [Class 108 (i)] In hydraulic tipping means in which the vehicle body is adapted to be raised by a hydraulic ram to which pressure fluid is fed by a pump a valve is arranged in the lower end of the cylinder which allows the free passage of the fluid to and from the ram at normal speeds but which in the event of a sudden rise of pressure in the ram or a sudden failure of pressure on the pump side stops or checks the flow of fluid from the ram and controls the descent of the body. The ram cylinder or extension b thereof is provided with a valve comprising a piston a with peripheral flutings g and an axial extension c with tapered end d. The valve is normally held in elevated position by a spring f but on failure of pressure from the pump the pressure in the ram cylinder depresses the valve and causes the extension c to enter the passage e either completely closing it and arresting the descent of the vehicle body or partially closing it by means of the tapered end d and so allowing the gradual descent of the body. A byepass may be provided the operation of which allows the body to descend when desired. Figs. 3 and 4 show a modification in which the valve h is provided with a small central passage k peripheral flutings l and a central boss. During normal working the valve is lifted off its seat allowing the pressure fluid to pass to the ram cylinder by means of the flutings and the passage k. Failure of pressure causes the valve to re-seat itself and closes all communication between the ram cylinder and the pump except through the small passage k.
Patent GB-439365-A (GB)
Title: Improvements in aircraft
IPC: B64C33/00
Filed: 1934-06-13
Abstract: 439,365. Ornithopters. DOWNING, A. E., 35, Clive Street, West Bromwich, Staffordshire. June' 13, 1934, No. 17484. [Class 4] An aircraft comprises a series of fixed or adjustable wings B and a series of wings A, which are reciprocated for effecting propulsion, each transversely opposite pair of which is actuated by a complete driving unit. As shown, the wings A are carried on members F, F1, and are reciprocated against the action of resilient members N. The driving-units are actuated by e.g. steam, or compressed air, the motion of pistons being transmitted to the wings through levers I linked to supports O1, bearing on adjustable fulcrums P and connected to pulleys C1 by a cord K. The pulleys C1 are integral with wheels C, the peripheries of which carry cords connected to the wings. Steam is admitted to the cylinders by means of a rotary disc-valve rotatable against the action of a spring H4. The apertures in the valve are closed, when the piston is at the upper end of its stroke, by projections on the piston. The wings are operated alternately along the body and valve-mechanism may be adjusted to give the desired sequence and length of stroke. This valve - mechanism is operated by the motion of the wings and includes reciprocatable rods H7, H8 which each carry projections H6, the projections on one rod engaging levers H5 on the valves alternate to those engaged by the other rod. 'When the inlet valves close exhaust valves are opened by members fixed to the rods or to the levers H5. The links I2 engage rollers J16 so that downward motion of the piston depresses members J4 against the action of a spring J15; the members J4 engage a projecting piece J5 to cut off steam and to rotate bell-crank levers J6, J10, J18 articulated on the aircraft frame to move either one or other of the rods H7, H8 ; the valves are meanwhile held closed by a stop J9 contacting with a member J8 on the rods H7, H8 until they are released by mechanism actuated by the series of wings about to commence their return stroke. Projections J17 on the lever J6, J10 engage trunnions on the member J5 which is articulated on a lever J11 pivotally mounted on a rod J12 pivoted to links J which carry the fulcrums P. Thus adjustment of the rod J12 simultaneously varies the instant of cut-off and the effective leverage of the lever I. Stability is maintained by a pendulum-actuated valve situated between the boiler and the inlet valves. Landing runners T1 are sprung by torsion springs and are retractable on removal of an abutment. The Provisional Specification describes resilient members N actuating two wings, valve-mechanism operated by rack-andpinion and a machine having a relatively large cambered main plane in addition to the series of wings.
Patent GB-713597-A (GB)
Title: Methods of controlling the electrical characteristics of semiconductive bodies
IPC: H01L21/00
Filed: 1952-07-11
Abstract: 713,597. Preparing germanium. WESTERN ELECTRIC CO., Inc. July 11, 1952 [July 13, 1951] No. 17525/52. Class 82(1) [Also in Group XXXVI]  Ingots of " pure " germanium may be prepared by means of a furnace as shown in Fig. 1, comprising a silica tube 10 and a graphite crucible 26 which contains germanium oxide. Heating is effected by coil 22, and the temperature measured by thermocouple 17. The Ge is heated to 650 C. for three hours., and then to 1000 C. in an atmosphere of hydrogen which flows from inlet 15 to outlet 20. Head 11 attached to the tube 10 is provided with a cooling coil 13. The reduction process results in the production of "pure" germanium which however still possesses small amounts of significant impurities providing N- type conductivity. Specifications 632,942, 632,980, 692,094 and 669,399 are referred to.
Patent GB-182461-A (GB)
Title: Improvements in or relating to hydro-aeroplanes
IPC: B64C17/08
Filed: 1922-06-26
Abstract: 182,461. Wattier, L. June 29, 1921, [Convention date]. Leakage, removing.-To increase the stability of a hydro-aeroplane on water, the hull is provided with a hollow keel comprising one or more ballast tanks which become filled with water when the machine alights. When flight is to be resumed, the water is blown out by compressed air, or a substance is introduced into the tanks which produces a large quantity of gas when in contact with water.
Patent GB-759581-A (GB)
Title: Improvements in or relating to escapement or driving mechanism having relatively rotatable and oscillatable magnetically coupled parts
IPC: G04C5/00
Filed: 1950-07-15
Abstract: 759,581. Magnet couplings. HORSTMANN CLIFFORD MAGNETICS, Ltd., and CLIFFORD, C. F. July 16, 1951 [July 15, 1950], No. 17748/50. Class 35. [Also in Group XVIII] The isochronism of a magnetic escapement or driving mechanism of the type described in Specification 596,216, [Group XVIII], is improved by providing between the rotary and oscillatory parts a magnetic coupling of varying reluctance. In the first example, Fig. 1a, the escape wheel 11 which is controlled by the oscillator 14, 15 is made thinner at the centre of the wavy track than at the apices. In another example, Fig. 1b (not shown), the wavy track of the escape wheel is made narrower at the centre than at the apices. The thickness of the escape wheel at the wavy path and/or the width of such path may vary gradually. In another example, Fig. 2, compensation for magnetic forces which adversely affect isochronism is provided by a U-shaped magnetic member 29, 30 which may be adjustable and is located adjacent the pole pieces 25 of the oscillator 24 carried by a resilient spring blade 26. The member 29, 30 may be replaced by two pins 30a, Fig. 4. Specifications 570,143 and 644,000, [both in Group XVIII], also are referred to.
Patent GB-357158-A (GB)
IPC: B29D22/00
Filed: 1930-06-10
Abstract: 357,158. Hollow rubber toys. RADIUM-GUMMIWERKE, Dellbruck, Cologne, Germany. June 10, 1930, No. 17819. Addition to 355,789. [Class 132 (iii).] For making inflatable hollow rubber toys in the form of human &c. figures, the front of the trunk and front half of the head are formed from two layers 1, 2 welded together and opened out to form a longitudinal seam 3, and the united layers are welded to another to produce a figure having, in its uninflated condition, weld seams disposed in intersecting planes. The two rubber sheets 1, 2 are stamped out and welded along the crooked seam 3 which extends upwardly when the sheets are opened out. The lower edge 6 is then folded back and another welding cut is made to form the feet 8. Another sheet 9 is placed behind the blank and a stamping cut is made along the line 10 constituting the longitudinal side seams of the figure. The eyes, mouth &c. are painted on after the stamping operations have been completed. Instead of using the two sheets 1, 2 a single doubled sheet may be used.
Patent GB-617194-A (GB)
Title: Alloys for high temperature use
IPC: C22C19/05
Filed: 1946-06-13
Abstract: An alloy for use at high temperatures has the following composition 10-30 per cent Cr; 2-40 per cent Ni; 0.5-7.5 per cent Mo; 0.5-10 per cent W; 0.05-1 per cent C; 0-1 per cent Si; 0-2 per cent Mn; 0.02-0.25 per cent N; 0.5-3 per cent Al or 0.1-0.7 per cent B or 0.1-30 per cent of Al and B, the B content not exceeding 0.7 per cent; the remainder being at least 5 per cent of Fe and incidental impurities.  The alloy may also contain 0.5-5 per cent of one or more of Nb, Ta, Ti and V, the proportion of Ti or V not exceeding 2 per cent.  The alloy may be used to manufacture hot-worked, welded or cast articles, which in normal use are exposed to elevated temperatures as high as 1500 DEG F.
Patent GB-1101527-A (GB)
Title: Improved hydraulic tensioner
Inventor: ASKEY ARTHUR
IPC: E04G21/12
Filed: 1966-04-25
Abstract: 1,101,527. Rod strainers. TORQUE TENSION BOLT CO. (PROPRIETARY). 25 April, 1966, No. 17895/66. Heading F2G. [Also in Division B8] An hydraulic tensioner comprises a tension rod 2 with a coupling 3 to connect to a roof bolt or other unit to be tensioned by rotation of handles 6. A screwed sleeve 8 has a piston 10 threaded to it in a cylinder 9, rotation of the sleeve 8 by handles 17 displacing fluid from the cylinder 9 along grooves 21 in a sleeve 11 into a second cylinder 12, the sleeve 11 being screwed into the cylinder 12 (being prevented from rotation by tongues on a boss 20 extending into the grooves 21), to increase the fluid pressure therein. A piston 14 in the cylinder 12 is pushed out by the increased pressure and strains the rod 2 by pressure against bosses 5, 15 respectively attached to the rod 2 and to the sleeve 8, thrust bearings 7, 16 being provided.
Patent GB-1210984-A (GB)
Title: Method and device for reading thermoluminescent dosimeters
Inventor: CHENAULT ROGER
IPC: G01T1/115
Filed: 1969-04-08
Abstract: 1,210,984. 984. Automatic Temperature Control Systems. COMMISSARIAT A L'ENERGIE ATOMIQUE. April 8, 1969 [April 18, 1968], No.17911/69. Heading G3R. [Also in Divisions C4 and G1] A circuit for controlling the heat cycle Fig.1, (not shown) of a thermoluminescent dosimeter 22 during readout includes heating plate 28 with associated thermistor 30, the thermistor forming part of the variable resistance of the RC circuit connected to unijunction transistor 34 and S.C.R. or thyristor 32. When the plate temperature approaches selected constant value O 1 , the thermistor value is such that the time lag after the unijunction transistor 34 has been turned on becomes substantial and such that the angle of opening of thyristor 32, and hence power to the plate from full wave rectifier 46, decreases until the temperature is maintained at O 1 . Resistance 40 shunted by the thermistor controls the slope of the temperature size to O 1 , resistance 42 controls the magnitude of O 1  and the temporary parallel connection of resistance 44 controls the temperature rise for readout of the main peak (18), the sequences being controlled by push button 60 and time delay circuits 54 and 58.
Patent GB-1414802-A (GB)
Title: Playback devices for disc-shaped record carriers
IPC: G11B17/04
Filed: 1972-08-21
Abstract: 1414802 Disc record play back TED BILDPLATTEN AG AEG-TELEFUNKEN TELDEC 21 Aug 1972 [26 Aug 1971 6 Oct 1971] 18010/75 Divided out of 1414801 Heading G5R In an arrangement for playing back video disc records made of foil material which is easily damaged by touch, each record is fed to the play back machine in a protective sheath which is formed with a slot or recess to allow access to the record by driving members which remove the record from the sheath and transport it to the play back position. With the record in the sheath 26 entered with its slot facing downwards and the cover 81 closed, driven rollers 78, 80 are raised whereby roller 80 engages the record through the slot and moves it from the sleeve and via a curved path defined by guide 76 to roller 78 which continues driving the record to the play back position 2. The presence of the record in position is detected by feeler 86 which actuates a centering core to centre the record and lock it to drive element 89. The record is returned to the sleeve by a reverse process. Specification 1,414,801 describes arrangements without a record moving system for retaining records in the play back position when the sleeve is withdrawn.
Patent GB-540439-A (GB)
Title: Improvements in flame dampers for internal combustion engines
IPC: F01N3/04
Filed: 1940-12-23
Abstract: 540,439. Cooling exhaust. DELANEY, C. T., and GALLAY, Ltd. Dec. 23, 1940, No. 18018. [Class 7 (ii)]  For damping the flames from the exhaust, tubular coils b for heating liquid are arranged in the exhaust pipe c at the place where the outlets d are provided in the pipe walls. These outlets comprise slots covered by shrouds as shown, and the end of the exhaust pipe may be closed or formed with an aperture e, which may be adjustable by means of screwed cap.
Patent GB-732307-A (GB)
Title: Improvements in or relating to cutting edges
IPC: A01D34/14
Filed: 1953-06-30
Abstract: 732,307. Making scythes and like blades. WOLF-GERATE GES. June 30, 1953 [July 15, 1952], No. 18060/53. Class 83 (2). In a method of forming contoured cutting edges on blades for agricultural implements &c. blanks 1, Fig. 1, having contoured edges 3 are bent along a contoured line 2, Fig. 3, and the displaced material outside the plane 5, Fig. 4, of one surface is ground away to form the cutting edge 6.
Patent GB-472079-A (GB)
Title: Improvements in or relating to hydraulic shock absorbers and the like differential pressure operated damping means
IPC: F16F9/28
Filed: 1936-06-30
Abstract: 472,079. Hydraulic shock absorbers. ARMSTRONG'S PATENTS CO., Ltd., and ARMSTRONG, F. G. G. June 30, 1936, No. 18068. [Class 108 (iii)] In a hydraulic shock-absorber comprising cylinders 15, 16 in which pistons or plungers 17, 18 are reciprocated through the intermediary of links 19, 20 by means of an angularly-displaceable, double-armed lever 14, in order to force liquid from one cylinder to the other through one or more restricted passages, the effective length of each arm of the lever is greater than the distance between the axis of either piston and the intermediate axis of symmetry of the pistons, while each lever arm is slightly inclined to a plane 34 normal to the axis of symmetry of the pistons and containing the centre of rotation of the pivot 12 of the lever. The angle of inclination is between 1‹ and 6‹. Flow of liquid through the restricted passage or passages is controlled by a tapered needle valve 25, Fig. 5, which is displaceable in a bore 31 in the shockabsorber casing 23 proportionately with the displacement of the pistons and against spring action, by means of a cam surface 13 on the lever 14.