baber/WOPTO huggingface dataset:
Patent GB-1374602-A (GB)
Title: Road vehicles having traction systems
IPC: H02P7/298
Filed: 1971-01-26
Abstract: 1374602 Automatic control of speed JOSEPH LUCAS (INDUSTRIES) Ltd 12 Jan 1972 [26 Jan 1971] 3153/71 Heading G3R [Also in Division H2] A road vehicle traction system comprises a drive motor having an armature 12 and a shunt field winding 36, a field current control circuit 37 ...44 for maintaining the current in the field winding, an armature current control circuit 15, 16 for effecting direct variation in the armature current under the control of a function generator 17, which receives input signals representing the position of the accelerator pedal 18 of the vehicle and the motor speed and determines the required armature current necessary to achieve a predetermined performance of the vehicle, the system further including field control menas 45... 47 operable automatically, when the back e.m.f. developed in the armature prevents further increase in armature current, for overriding the field current control circuit and lowering the field current. In the arrangement shown the function generator 17 provides inputs to upper and lower level current "blocks" 19, 21 which with upper and lower level detectors 22, 23 control the thyristor firing circuit 16 for a thyristor controller 15, Fig. 1 (not shown), through the intermediary of a logic unit 24, a Schmitt bi-stable 25, a minimum off time circuit 26, a minimum on time circuit 27 and an output stage 28. The function generator 17 is coupled to the accelerator pedal 18 and has an input from a road speed tachometer 35. An inhibit circuit 31 acts on the logic unit 24 to ensure that a capacitor in the thyristor controller is charged before the vehicle is started and a cycling oscillator 29 prevents a series thyristor in the controller remaining on indefinitely. A frequency-to-voltage converter 32, a reference source 34 and a comparator 33 restrict the switching frequency to value such that the thyristors in the controller 15 can operate satisfactorily. The field current is maintained by a controller 37, an out-put stage 38 and an oscillator 39 under the control of a comparator 43 which has an in-put from a field current setting circuit 44 and another from a field current measuring circuit comprising an integrating amplifier 41 and inverter 42. A comparator 46 compares the demanded armature current with the actual armature current and, when direct armature control becomes impossible, provides a signal to the field current setting circuit 44 which reduces the field current. The circuit 44 is coupled to the accelerator pedal 18 so that power may be saved by reducing the field current for light accelerator pedal settings. Figs. 3 to 6 (not shown) illustrate the circuit components of the system of Fig. 2.
Patent GB-668669-A (GB)
Title: Improvements in guiding means for roller-blind rods
IPC: E06B9/58
Filed: 1950-02-07
Abstract: 668,669. Window blinds. ATELIERS LEMAIRE-SCHROYENS & CIE. SOC. ANON. Feb. 7, 1950 [Feb. 7, 1949], No. 3159/50. Class 20(iii) A blind 5 is adapted to wind and unwind evenly upon a spring-return roller which is fitted to a vehicle window by providing at its free end a tube 6 having toothed wheels 9, one at each end, for engagement with racks 13 which are provided in guide members 14, each of which is housed within a slot formed in a side member of the window frame. The shaft 8a of the wheels 9 are mounted in end bearings 10 and have squared inner ends 8 which fit, with slight friction, within the correspondingly shaped ends 7a of an inner tubular member 7. Springs 11, each of which is housed between a block 12 and an end 8 of one of the shafts 8a, urge the latter outward to press the wheels 9 against the raised parts 14a of the guide members 14 with a force which is sufficient to hold the tube 6 firmly in any desired position. The narrowed parts 10a of the bearings 10 move freely along the slots formed by the inturned edges 14b of the members 14, but they have little lateral movement. The rack teeth 13 may be formed along one side of a guide member 14, or they may be formed in a separate strip, preferably made of brass, which is fitted to the guide 14. Stops 8b prevent excessive outward movement of the wheels 9 while the tube 6 is being mounted in a window frame.
Patent GB-1454431-A (GB)
Title: Apparatus for extruding sections and in particular tubes of cross-linked plastics material
IPC: B29C48/09
Filed: 1974-01-24
Abstract: 1454431 Extruding cross-linkable thermoplastics PONT-A-MOUSSON SA 24 Jan 1974 [7 Feb 1973] 03254/74 Heading B5A A piston 15 reciprocating in a chamber 14, e.g. at 200-300 strokes per min., delivers polyethylene containing cross-linking agent at an inlet orifice 17 to a cross-head die comprising a tubular inlet passage 18; a plurality of circumferentially spaced parallel passages 19 which are of greater length than the passage 18, and greater total area than the orifice 17; and a tubular outlet passage 23 defined between a mandrel 9 and a surrounding die 20. The polyethylene is delivered into the chamber 14 through an orifice 16. A frusto-conical passage 21 of constant thickness leads from the passages 19 to the passage 23 which is also of constant thickness throughout its length. Preferred relative cross-sectional area ratios are 1; 2À9; 0À66; 2À0; 0À38; respectively for the chamber 14, passage 18, total number of passages 19, the mean section of the passage 21, and the passage 23. Against the restriction of the passages 19, the polyethylene is subjected by the piston 15 to a pressure of several thousand bars, whereby it is heated. The polyethylene temperature is raised to that of a gel condition in passages 29, and reaches the temperature at which cross-linking commences at its inlet into passage 21 which, because of its greater area, provides a damping effect upon the pulsations applied by the piston. Cross-linking is substantially completed in the passage 23. The die 25 is clamped by screws 27, and transversely adjustable by screws 28. Cylindrical heating cartridges 30 are provided in the body of the die-head, and the die passage 23 is heated by a surrounding resistance heater 33, and a cylindrical heating cartridge 32 within the core.
Patent GB-175615-A (GB)
Title: Improvements in or relating to rectifying and connecting and disconnecting switches for alternating electric currents
IPC: H02M1/22
Filed: 1922-02-03
Abstract: 175,615. Guillin d'Avenas, H. G. H. de. Feb. 15, 1921, [Convention date]. No. Patent granted (Sealing fee not paid). Commutator switching-arrangements. - An alternating current is converted into continuous current by a commutating device comprising two rotating brushes b connected to the alternating - current supply by means of sliprings, and adapted to engage at a predetermined speed with a stationary contact ring c, made up of two equal segments insulated from each other and connected to the external circuit. The brushes b are adapted to slide in recesses in an insulating member a1, and are held. away from the ring c by springs b1, when the speed is below the predetermined value. The brushes are rotated by a synchronous motor supplied with alternating- current from the same source. The invention is particularly applicable to charging accumulators from magneto-electric machines.
Patent GB-489857-A (GB)
Title: Improvements relating to the control of fuel injection pumps for internal combustion engines
IPC: F02D1/00
Filed: 1937-02-04
Abstract: 489,857. Controlling motor vehicles. C.A.V. BOSCH, Ltd., HOPKINS, V. H. F., and HARRIS, E. F. Feb. 4, 1937, No. 3297. [Class 79 (v)] [Also in Groups XXVI and XXIV] The movement of a centrifugal governor e is transmitted to the control rack b of a fuel-injection pump by a lever a mounted on a fulcrum j, carried by a lever k adjusted by a crank n. Movements of a lever m are transmitted to the crank n through the spring p. The movement of the fulcrum j in a direction to increase the full supply is restricted by moving a pin t into the path of the lever k. The stop t is actuated by the lever r which is moved when the change-speed gear is moved into "top."
Patent GB-1118491-A (GB)
Title: Cooling apparatus
IPC: H01J5/24
Filed: 1966-01-25
Abstract: In apparatus for coating the top surface of the brim of a hollow vessel with enamel, such as in Specification 844,102, means are provided for maintaining the centre of the orifice of the enamel container in alignment with the centre line of the surface of the brim during rotation of the hollow vessel by interconnected pairs of bell-crank levers having tracking devices contacting the inner and outer peripheries adjacent the brim.  A hollow vessel 18, such as a rectangular television viewing panel which is to be sealed to a core with matching rectangular brim, is supported in a cradle 9 on a rotatable platform 25 with its brim 19 upwardly disposed, a cam 15 with outer surface matching that of the brim 19 being positioned between the cradle 9 and platform 25.  Rotation is effected by a friction drive roller 20 forced against the cam 15 and driven by a belt 23 from a motor 21. Alternatively, gear teeth on cam 15 may be engaged by a driven pinion gear.  The motor 21 is supported on a platform 24 suspended from a platform 30 movable towards and away from the cam 15 on rods 31, (32) by means of a pressure cylinder 60. The container 35 for the enamel, which is dispensed through an orifice 40, is pivotally suspended by arms 37, 38 from supports 54a, 54b extending upwardly from a further platform 54 pivotally connected by arms 47 from the platform 30. A motor 43 for the stirrer in tank 35 is also supported on platform 54 which is also connected to platform 30 by an arm 39 connected to the piston-rod 56 of cylinder 55 pivoted to platform 54 to allow for additional movement towards and away from the cradle 9.  Bell-crank levers 41, 42 are pivotally connected to opposite sides of tank 35 with short arms 41b, 42b interconnected in scissors fashion and depending yoke shaped arms 41a, 42a have contacting fingers 41c, 42c to engage the inner and outer surfaces of the vessel 18 adjacent the brim 19, the fingers 41c, 42c being aligned with the centre of the orifice 40.  A spring-actuated plunger 67 is biased to press against arms 41b, 42b so that the fingers engage the vessel 18, and the orifice 40 is therefore maintained on the centre line of brim surface 19.  To allow for intentional protrusions adjacent the outer border of the vessel 18, as with viewing panels, protrusions 77 are provided corresponding thereto on platform 25 to depress a push-button 78 in a circuit which includes a magnetic or electric brake 72 on the support arm 54a and keyed to the axle (73) by which arm 38 is suspended so as to prevent lateral movement of arm 38 and of the tank 35. Movement of fingers 41c, 42c away from vessel 18 is effected by the piston-rod 69 of a cylinder 68.
Patent GB-121858-A (GB)
Title: Improvements in Brakes or Tensioning Devices for Warp Beams of Textile Looms and the like.
Inventor: HINDLE THOMAS
IPC: D03D49/08
Filed: 1918-02-26
Abstract: 121,858. Hindle, T., and Aspden, A. Feb. 26, 1918. Letting-off warps.-In retarding-devices for warp beams &c. wherein the tensioning of the material unwound from the beam is automatically effected and regulated by the weight of the beam and the material thereon, one or each brake drum of the beam is supported in a brake bearing consisting of a part H pivoted to a part C, which is adjustable circumferentially around the brake drum in a bracket A fixed to the loom. The parts H, C are lined with leather &c. and are finished to a diameter equal approximately to that of the brake drum. In use, the beam in rotating clockwise tends to rise on the part C. By adjusting this part with the part H relatively to the bracket A, the amount that the beam rises is controlled, and hence also the tension of the unwinding material,.
Patent GB-409474-A (GB)
Title: Improvements in wall plugs and hook sockets
IPC: F16B13/12
Filed: 1933-02-03
Abstract: 409,474. Wall plugs. HALL, C. R., 29, Harringay Road, London. Feb. 3, 1933, No. 3368. [Class 89 (i).] A wall plug comprises a split tubular member 1 having indentations 6 on its periphery, which engage a recess in the member 7. The plug is expanded by driving this member inwards till the part 7b engages the indentations 6. To remove the plug from the wall the member 7 is driven still farther inwards till it is clear of the indentations. In a modification the wedging surface is carried on an internal member which has projections passing through holes in the casing.
Patent GB-543968-A (GB)
Title: An improved catalytic treatment of hydrocarbon oils and the manufacture of motor fuels by such treatment
IPC: C10G35/06
Filed: 1940-02-23
Abstract: 543,968. Hydrocarbons. STANDARD OIL DEVELOPMENT CO. Feb. 23, 1940, Nos. 3467, 3468, 3469 and 3470. Convention dates, March 31, 1939, May 4, 1939, May 31, 1939 and July 17, 1939. [Class 2 (iii)] , In a process for increasing the octane number of a hydrocarbon oil; of the kind in which the oil is subjected to a temperature between 800- 1100‹F. under pressure in the presence of a catalyst selected from compounds of metals of Groups IV, V, VI, and VIII of the Periodic system and in the presence of a gas containing free hydrogen, the time of treatment is so adjusted in conjunction with the temperature and pressure that there is no net consumption of hydrogen during the treatment, the re-action gases being recycled in whole or in part to provide the hydrogen-containing gas required in the process. The preferred catalysts are oxides or sulphides of metals of Group VI, particularly a chromium or molybdenum oxide on aluminium oxide. The quantity of hydrogen produced during the process may be varied by varying the percentage of lower boiling hydrocarbons in the feed. Thus the feed may be separated into a lower and a higher boiling fraction, the latter being treated in the early stages of the process, and the former in the later stages when the activity of the catalyst is declining. The period during which the catalyst may be used before it is necessary to regenerate it is thus prolonged. In the arrangement shown in Fig. 2, the pump 52 draws naphtha from a tank 51, and forces it through line 54 and heating coil 55 into re-action chamber 61. Hydrogen is introduced into the line 54 from a tank 56, and sulphur compounds may be introduced from a tank 58. The products of re-action from pass the chamber 61 through a cooler 64 to a high-pressure separator 65, from which liquid products pass by line 67 to a lowpressure separator 72. Liquid from the separator 72 is removed by line 74, a portion of it being returned by pump 76 to the separator 65, where it serves to remove from the gaseous products a substantial portion of the normally gaseous hydrocarbons. The remainder of the liquid from the separator 72 is forced by pump 82 into a fractionating tower 84. The gas from the separator 65 is returned to the tank 56 by a pump 79. When it is necessary to regenerate the catalyst, valves 54a and 63a are closed, and a mixture of inert gas and air are introduced into line 54 through pipes 89, 90 and passed through the heater 55 and reaction chamber 61 to a line 91. Numerous examples of the process ' are given. Specification 472,538 is referred to.
Patent GB-551781-A (GB)
Title: Improvements connected with protractors
IPC: B43L7/00
Filed: 1942-03-16
Abstract: 551,781. Protractors. MACLEAN, J. D. March 16, 1942, No. 3469. [Class 97 (iii)] A protractor of rectangular form has provided on two opposite sides of a face a datum mark A and the edges B marked in degrees from 0 degree to 360 degrees. Transverse slots C are also provided adjacent the ends with bevelled edges D showing the degree markings of the complementary angles. A longitudinal slot L may be provided adjacent which are marked suitable scales on both faces.
Patent GB-1506121-A (GB)
Title: Flow control apparatus and system
IPC: F16K11/07
Filed: 1976-01-29
Abstract: 1506121 Valves M H GROVE and J M E GROVE [trading as M & J DEVELOPMENT CO] 29 Jan 1976 [12 Feb 1975] 03541/76 Heading F2V Flow-control apparatus, e.g. for fluid distribution systems incorporating flow-meter testing circuits, comprises a hollow body 10, Fig. 1, having an inlet 14 and a pair of outlets 16, 17. Moreover, the body contains an axially adjustable tube 18 and is provided with sealing assemblies 13a, 13b, 13c, co-operable with cylindrical surfaces provided at sections 43a, 43b, 43c, 43d, 43e of the tube. The tube communicates with the inlet 14 and is provided with porting 26, 27 such that when it is in the position shown, the inlet and outlets are isolated from one another. In a second position of the tube a flow path is established from the inlet 14 through the porting 26, 27 to the outlet 16 and, in a third position, a similar flow path is established from the inlet 14 to the outlet 17. The tube is adjusted via a rod 19 by manual, electric, hydraulic or pneumatic means. Each sealing assembly comprises a pair of resilient sealing rings 38, Fig. 5, having surfaces 47 co-operable with larger-diameter sections 43 of the tube. The space defined between each section 43 and rings 38 is communicated through a passage 51 with a pressure indicator 54 and with a pressure switch 56 for operating signal lamps 59, 60, whereby poor sealing can be detected. In an alternative embodiment, Fig. 6 (not shown), the tube is formed with an annular recess instead of the larger-diameter sections 43 and the rings 38 co-operate with the tube on opposite sides of the recess. In another embodiment, Fig. 7 (not shown), the tube includes the larger-diameter sections 43 but the rings 38 are each replaced by a ring (76, 77) of substantially cup-shaped form in cross-section and having an annular spring (84) associated therewith.
Patent GB-1468186-A (GB)
Title: Multi-functional fluid control valve assembly
IPC: B25D9/26
Filed: 1974-04-01
Abstract: 1468186 Fluid-pressure control circuits AUSTRALIAN IRON & STEEL PTY Ltd 1 April 1974 [12 April 1973] 3631/76 Divided out of 1468184 Heading F1P [Also in Division B3] In the circuit shown in Fig. 1 a motor 9, which drives a rock-drill, is fed through a valve 6, a line 18 and a line 12 in a flow-divider 5 whilst a drill-feed motor 10 is driven through a valve 8 and a line 13. An adjustable orifice 22 determines the flow in the line 13. This orifice is in a valve 17, Fig. 2 and is normally held at a maximum by a spring 23. When the drill, driven by the motor 9, encounters hard rock, the pressure in line 18 rises. This rise is fed via line 19 to a piston 20 of the valve 17 and acts to progressively close the orifice 22 thus decreasing the rate at which the drill is fed into the rock. An antistall valve 24, Figs. 1, 4, has an orifice needle 33 which is lifted from its seat to return fluid to the reservoir if the pressure in a passage 36 rises above a pre-set limit due to the drill engaging hard rock. A screw 35 provides the pre-set load on a spring 30A. Valves 6, 7, 8 are held in position by detent devices and valve 8 is automatically returned to its retract position when the drill feed reaches the end of its travel thereby causing a rise in pressure in the feed line 13A. When the drill feed is fully retracted an overload valve 39 opens. Safety relief valves 40, 41 are provided in case the feedrate is not reduced. A ram 11 locks the drill pillar between roof and floor in a mine. Fig. 3 shows the spool valve 8 with the detent device 37 and relief valve 39. A member 61 is forced against a seat 62 by a spring 63, the pressure of which is adjusted by a screw 64. When the motor 10 has reached the end of its travel, pressure rise through a bleed 78 lifts member 61 off its seat so that spring 52 can move the spool 45 to the null position. Relief valve 39 is a poppet valve. The anti-stall valve is also incorporated. A pressure rise in inlet 99, due to the drill approaching stall conditions, acts on piston 93 to open valve member 94 against a spring 97. Screw 101 adjusts the latter.
Patent GB-889536-A (GB)
Title: Improvements in or relating to fuel elements for nuclear reactors
Inventor: KENT IVOR
IPC: G21C5/06
Filed: 1959-02-03
Abstract: 889,536. Nuclear fuel elements. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Feb. 3, 1960 [Feb. 3, 1959], No. 3745/59. Class 39(4) In a gas-cooled nuclear reactor fuel element, 10, the sheathed fuel members 11 are mounted on beryllium plates 13 which are separated by the annular graphite spacers 14. The weight of 11 is carried by the plate at the lower end and the upper end may expand freely. The graphite cylinder 15 surrounds the assembly which is supported on the internal ridge 16. Each plate 13 has a central aperture 18 through which is threaded a stainless steel rod by which the element is lifted. The rod engages the element at the boss 22 and bush 24. Coolant gas flows along the element through apertures 19 in plates 13 and through the wire gauze 32 at the base. The lifting rod has longitudinal flats 33 to accommodate the thermocouple cables 34 which terminates at the hot junction 35 embedded in a raised portion 36 on element sheath 38. The ceramic sleave 39 fits round the cables and lifting rod and engages the walls of 18. The spacers 14 are separated from 15 by the insulating space 51. In a second embodiment, not shown, the sleave 39 is replaced by a spring which locates the lifting rod in the hole 18. Specifications 873,074 and 882,714 are referred to.
Patent GB-918647-A (GB)
Title: Process and apparatus for the manufacture of agglomerated bodies from mineral fibres, particularly glass fibres
IPC: B28B1/52
Filed: 1961-02-01
Abstract: The invention comprises a process for the manufacture of agglomerated bodies from mineral fibres including the steps of forming the fibres and depositing them on transporting means, for example a conveyer belt, wherein, for the purpose of agglomerating the fibres, a hot plaster wash is applied to the fibres (i) before they are deposited on the transporting means, or (ii) whilst they are on the transporting means, or (iii) both before they are deposited on the transporting means and whilst they are on the transporting means. The invention also comprises apparatus for carrying out the above process which comprises two or more fibre-forming devices placed successively after each other above the transporting means, a hot plaster wash spraying device being associated with each fibre-forming device for spraying hot plaster wash on to the fibres.  The hot plaster wash is preferably applied to the fibres, for example by spraying, soon after they leave a device for forming the fibres.  A mat formed by the fibres to which the hot wash has been applied may be rolled and cooled during the setting of the plaster.  Any common plaster, for example, plaster of Paris, may be used and inert fillers, colouring matter, accelerators, setting delayers, hardeners, or organic compounds such as polyvinyl alcohol, may be added. Minerals such as barium sulphate, kaolin and mica which decompose endothermally at temperatures of 500 to 700 DEG C. may also be incorporated in the plaster.  The plaster wash is generally applied at a temperature above 70 DEG C. and the quantity of mixing water is about 70 to 80% by weight of the plaster.  The proportion of plaster to fibres may vary and may also vary through the depth of the product.  Thus products may be formed having a high proportion of plaster in the surface regions and a low proportion in the central region, or vice versa, the latter products being useful as fire-retardent panels.  An example illustrates the process using apparatus consisting of three high speed spinners placed in series above a conveyer belt, each spinner producing streamlets of material which are attenuated into fine fibres by the action of currents of gas.  The attenuated fibres are then sprayed with the hot plaster wash by means of atomisers placed below the spinners, the treated fibres then falling on to a conveyer belt.  Optionally, layers of plaster may be introduced by means of distributers placed above the conveyer belt and between successive spinners.