baber/WOPTO huggingface dataset:
Patent GB-1415172-A (GB)
Title: Ac motor control circuits
IPC: H02P25/04
Filed: 1972-02-02
Abstract: 1415172 Control of AC motors GECELLIOTT AUTOMATION Ltd 2 Feb 1973 [2 Feb 1972] 4843/72 Heading H2J A control circuit for a split-phase capacitor motor M comprises a triac T 1  controlling the main motor winding 3 and controlled by another triac T 2 , a clamping circuit 6 and a timing circuit 9, the arrangement being such that the triac T 1  is fired and turned off in each half cycle of the supply voltage to provide phase control of the fundamental component of the main winding voltage independent of its amplitude, and the phase of the fundamental component is controlled in dependence upon a predetermined speed/phase characteristic whereby a predetermined (quadrature) phase relation between the voltages of the main and auxiliary windings 3, 1 is maintained for a range of motor speeds. During each half cycle of the A.C. supply to the motor, the following sequence of the operations occur: (1) the triac T 1  is fired at an angle 8 determined by the circuit 9; (2) the triac T 2  is fired at an angle (#+#) determined by the circuit 9, thus causing a charged capacitor C 1  to turn off the triac T 1 ; (3) the consequent back EMF raises the potential at point X to a value limited by further charging of a capacitor C 2  in the circuit 6 and by the discharge and charge of the capacitor C 1  to reverse its polarity; (4) decrease of the main winding current to zero causes the capacitor C 1  to switch off the triac T 2 . Typical characteristics of main winding voltage and current and the voltage across triac T 1  are discussed, Fig. 5 (not shown) and it is explained how, by a suitable relationship between the firing and turn-off angles 8 and (#+ #) of triac T 1  over a desired speed range, the amplitude and phase of the "slice" of supply voltage applied to the main winding 3 during each half cycle can be independently controlled to achieve speed control whilst maintaining the predetermined quadrature phase relationship between the voltages of windings 1, 3. The relationship between the firing and turn-off angles is produced by the timing circuit 9, which is controlled by a speed input signal derived manually or from a closed loop temperature control system wherein the motor drives a fan. The relationship between the speed signal and the firing and turn-off angles can be calculated or empirically determined using the torque/ speed characteristics for the motor and fan or by running the motor on load at a number of different speeds, each time adjusting the two angles together to obtain the quadrature phase relationship, whereby a desired speed/angle relationship is obtained which is built into the circuit 9. This relationship may be modified over the lower portion of the speed range to meet other operating Tequirements of the circuit, Fig. 3 (not shown). Comparison is made with described conventional speed control circuits, Figs. 1 and 2 (not shown).
Patent GB-680144-A (GB)
Title: Improvements relating to motor cycle saddles
Inventor: BENNETT GEORGE CLIFFORD
IPC: B62J1/12
Filed: 1950-02-25
Abstract: 680,144. Saddles. MILVERTON, Ltd., J. May 21, 1951 [Feb. 25, 1950], No. 4885/50. Class 136 (iii) An extended saddle for a motor cycle comprises a cushion 3 supported on a rigid base member 1 provided at its front and with a bracket 12 which is connected to the motor cycle and on its underside with a support 17 which is longitudinally adjustable on the base member 1 and clamped to the seat pillar stays of the motor cycle. The member has a boundary flange 2 to which a flexible cover 4 is detachably secured by clamping devices 6. The cushion 3 incorporates a pad 7 superposed on spring mesh 8 supported on springs 9 anchored to a wire frame 10. Bolts 16 engage holes in a web 17a of the support 17 and are adjustably secured by nuts in parallel longitudinal slots 15 formed in depending flanges 18 of the support 17 for adjustably clamping brackets 20 attached to the seat pillar stays. The base 1 is cut away at 21 and a recess 22 is formed in the spring interior 9 to accommodate the rear mudguard. A strap 23 connects the base 1 to the mudguard.
Patent GB-968502-A (GB)
Title: O,s-disubstituted thiol-type thiamines and process for preparing them
Inventor: TAKAMIZAWA AKIRA
Filed: 1963-02-06
Abstract: The invention comprises thiamine derivatives of formula: <FORM:0968502/C1/1> where X is an oxygen atom or a sulphur atom, and salts thereof. The compounds may be prepared by reacting a salt of formula: <FORM:0968502/C1/2> where Met. is an alkali metal, with an equimolar amount of a reagent of formula: X1-CO-X-CH2CH=CH2 III where X1 is a halogen atom, to obtain an intermediate of formula: <FORM:0968502/C1/3> and then reacting the intermediate II1 with an equimolar amount of reagent III. Alternatively, the salt of formula II may be reacted with two equimolar amounts of reagent III. Examples are given.  Compounds of formula I above and their non-toxic salts may be mixed with carriers, e.g. lactose, mannitol, corn starch, talc and magnesium stearate, and other ingredients if desired, e.g. riboflavin, pyridoxin, folic acid, biotin, inositol and mineral salts, and used in the treatment of inflammation and vitamin B1 deficiency.
Patent GB-1253737-A (GB)
Title: Fishing apparatus
Inventor: SHUKER MICHAEL KENNETH
IPC: A01K87/04
Filed: 1969-01-29
Abstract: 1,253,737. Fishing apparatus. M. K. SHUKER, A. J. MINSHALL, L. WELCH, E. V. BYGOTT, W. H. HARRIS and N. H. PEATE [trading as MENWAL DESIGNS]. 26 Feb., 1970 [29 Jan., 1969], No. 4966/69. Heading A1A. A line guide for a fishing line comprises a tubular member D having a transverse aperture E through which the line passes and which is attached to the fishing rod by a clamp G, and a rod C carrying an end cap A slidably mounted in the tubular member D and biassed by means of a spring provided in the end cap (not shown) such that depression of the rod by finger pressure causes the line passing through the aperture E to be clamped. (For Figure see next page)
Patent GB-729089-A (GB)
Title: An improved display device or the like
IPC: G09F1/06
Filed: 1953-02-23
Abstract: 729,089. Display devices. PHILCOX, C. H. Jan. 8, 1954 [Feb. 23, 1953], No. 4988/53. Class 3 (2). [Also in Group XV] A display device or the like formed from a foldable blank (see Fig. 1, not shown) comprises a body 1 carrying letterpress and/or pictorial matter, two side flaps 2 to be folded' inwards towards a wall and two arms 4 projecting from the flaps to be folded over and secured to a picture rail by pins, tacks, adhesive tape or other means. The body 1 may be square, rectangular or any other shape and the side flaps 2 may have cut-away portions 3 to accommodate the picture rail. The device may be made of cardboard, boxboard or of transparent material, and have a window, and a light may be placed behind the device. A bottom flap may be provided so that the device forms a vase. The arms 4 may be formed at the bottom of the flaps 2 and the blank is preferably scored along lines 5.
Patent GB-980489-A (GB)
Title: Multiple stage masts for lift trucks
IPC: B66F9/08
Filed: 1963-02-07
Abstract: 980,489. Masted lift trucks. TOWMOTOR CORPORATION. Feb. 7, 1963 [Feb. 19, 1962], No. 4988/63. Heading B8H. The mast of a lift truck comprises three or four sections and is extended by means of an hydraulic ram, secured between the second and third sections, and a chain extending between the top of the first, fixed, section and the lower end of the third section and passing around a sprocket mounted at the lower end of the second section. In the embodiment shown diagrammatically in Fig. 4, the lifting carriage 50 is raised on the mast section 34 by an hydraulic ram 61, 62 and chains 79 extending between the carriage 50 and an anchorage 85 on the mast section 34 and passing over rollers 78 on the piston-rod 62. The mast section 34 is raised relative to the section 32 by an hydraulic ram having a cylinder 94 secured to the section 34 and a piston-rod 91 secured to the section 32. Extension of the ram raises the mast section 34 relative to the section 32 and also raises the section 32 relative to the fixed section 31 since chains 109 extend from the anchorage 85 on the section 34, round pulleys 114 mounted on the section 32 to an anchorage 118 on the section 31. The two rams are actuated sequentially so as to raise the carriage 50 to the top of section 34 before raising the sections 34, 32. The mast sections comprise pairs of interconnected channel members, the section 32 being nested between the inner and outer sections 34, 31 and wear strips being provided between the adjacent flanges of adjacent sections, Fig. 3 (not shown). The flanges of section 34 are provided with notches for receiving the guide rollers of the carriage 50 when it reaches the top of the section. In a four-section mast 130-133, Fig. 7, the sections 131, 132 are raised relative to the section 130 by an hydraulic ram 151, 153, as in the previous embodiment, and the section 133 is raised, as the section 132 is raised, by chains 158, extending between anchorages 149, 160 on the sections 133, 131, respectively, and passing over pulleys 156 on the section 132. A ram 140, 142 is mounted on the section 133 to raise the lifting carriage 136, and is provided with a hollow piston rod surrounding a fixed guide rod 145. In a modification, Figs. 8-10 (not shown), the ram 140, 142 is replaced by a ram, mounted on the section 132 and provided on its piston rod with pulleys over which pass chains extending between the lifting carriage and the section 132. On extending this ram, the carriage is raised through a small distance on the section 133 which remains stationary until the piston-rod engages a plate mounted on the top of the section 133 and extending over the ram, whereafter, continued extension of the ram continues to raise the carriage on the section 133 and raises the section 133 on the section 132.
Patent GB-556748-A (GB)
Title: Improvements in vibratory feed control mechanism
IPC: G01G21/00
Filed: 1942-04-16
Abstract: 556,748. Feeding materials from hoppers. AVERY, Ltd., W. & T., and PAGE, A. E. April 16, 1942, No. 5024. [Class 78 (i)] [Also in Group XVIII] A vibratory control mechanism associated with a pneumatic control of a feed supply is characterized by the pneumatic pressure being released through a reed valve, said valve having connection to a feed plate which is vibrated in consonance with the said pressure release to deliver material deposited on the plate. As shown in the Figure, powdered material is fed from a hopper b on to a shoot c for delivery to a receptacle a which may be the pan of a weighing machine. The shoot c is mounted on flexible plates d one of which is provided with a button d<SP>1</SP> adapted to be vibrated through a diaphragm f by a button k<SP>1</SP> carried on a resilient reed valve k mounted on the open end of an air pressure cylinder j. Depression of a valve o admits compressed air by way of tube h to cylinder j so as to flutter the reed valve k and hence to vibrate the shoot c to feed the powder to receptacle a. The valve o may be operated manually or by the weighing apparatus associated with receptacle a. The note emitted by the reed valve gives an indication that material is being fed. The shoot may be arranged horizontally.
Patent GB-733010-A (GB)
Title: Improvements in television aerials and mountings therefor
Inventor: MARTINDILL BOYCE GILBERT
IPC: H01Q1/12
Filed: 1953-02-23
Abstract: 733,010. Aerials. WOLSEY TELEVISION, Ltd. Nov. 10, 1953 [Feb. 23, 1953], No. 5029/53. Class 40 (7). The invention relates to the mounting of " H " and other aerials with a horizontal crossbar so that the axis of maximum sensitivity can be accurately aligned with the transmitter. It is usual to mount the crossbar on the upper end of a stand-off arm 6 secured to and rotatably adjustable in a lashing bracket 7 secured to a chimney stack or other structure 8. According to the invention the bracket 5 securing the cross bar to the upper end of the stand-off arm provides for angular adjustment of arm and also has means for locking it when the desired position is reached. In a preferred embodiment the bracket 5 consists of two identical T- shaped sections having transverse channel parts 9 and a semi-cylindrical portion 10 in which is formed a slot 14 extending over about 70 degrees of arc and strengthened by a web 15. The two sections are assembled on each side of a square cross-bar and bolted thereto by bolts 11 passing through holes 12. The cylindrical bracket so formed is mounted on the top of the stand-off arm and the aerial system adjusted directionally after which butterfly-headed set screws 13 or other clamping means are passed through one or both slots to engage the circular stand-off arm end.
Patent GB-1371986-A (GB)
Title: Automatic fuel feed cut off for an internal-combjstion engine
IPC: F02D45/00
Filed: 1972-02-03
Abstract: 1371986 Engine stop gear H A SAPP and W A STAINSBY 24 Jan 1973 [3 Feb 1972] 5067/72 Heading F1K An automatic fuel feed cut-off for an internal combustion engine, to protect it from over-heating, comprises a spring-loaded liquid control valve 5 which is held in operative position against the effort of its spring-loading 6 by a plug 13 of material which will melt or disintegrate when subjected to a temperature above a predetermined value. The spring-loaded valve may directly control the fuel-flow which will normally pass therethrough and be shut-off on melting or disintegration of the plug or indirectly control the fuel-flow by passing oil pressure to a diaphragm associated with a valve in the fuel feed line. The spring-loaded valve may be used in conjunction with a lubrication pressure operated device described in Specification 1136761.
Patent GB-932275-A (GB)
Title: Momentary venting means for power-operated percussive tool
Inventor: AKERMAN NIGEL
IPC: B25D11/12
Filed: 1962-02-09
Abstract: 932,275. Percussive drills. BLACK & DECKER MANUFACTURING CO. Feb. 9, 1962, No. 5129/62. Class 124. A power-operated percussive tool 10 comprises a hollow striker or a ram 18 and a driving member 21 together defining an air chamber 26, momentary venting means for allowing the mass of air entrapped in the chamber to adjust to a substantially constant working level, a disc-shaped piston 20 formed on the end of the member 21 and a recess 28 provided in the striker 18, the width of the recess being greater than the thickness of the piston whereby the mass of air in the chamber communicates with the air beyond the piston whenever the latter passes the recess. The piston is fitted with a resilient sealing ring 25 and the recess 28 is formed with chamfered edges 29 to prevent damage to the ring. The ram is formed with glands 18 for guiding it in a cylinder 30. In the construction shown, the piston is driven via a rod 21, cross-head 22 and connecting rod 23 by an electric motor 11; alternatively the ram may be driven and the piston itself adapted to strike the tool bit 15.
Patent GB-925772-A (GB)
Title: Improvements in and relating to heating appliances such as hot water boilers, space heating stoves and cookers
Inventor: ATKINSON TREVOR CHARLES DUNBAR
IPC: F24C15/00
Filed: 1961-02-11
Abstract: 925,772. Draught regulations. PERKINS BOILERS Ltd. Dec. 6, 1961 [Feb. 11, 1961], No.5166/61. Class 51 (1). [Also in Group XI] In a "balanced flue " heating appliance such as a hot-water boiler, space-heating stove or cooker having a burner and a power-driven blower delivering fresh air to the burner through a control valve at a suitable pressure, the air that is in excess of the burner requirements, as determined by the valve, is delivered by a by-pass to a flue gas outlet to create exhaust conditions which will effectively discharge the products of combustion from the appliance. The appliance has a hermeticallysealed burner chamber 10 in which an oil burner of the vaporizing type is placed. Above the said chamber is a combustion chamber 12 with an exhaust connection 10 leading to a flue box 20 and thence to a flue 21. Air is supplied to the burner by a fan 37 driven by an electric motor 36, the amount being controlled by a valve 39 which may be of any suitable type, for example, a hinged flap 39 and adjusting screw 40, as shown in Fig. 5, adjustable to supply a predetermined amount of air to the burner. The excess air which is not allowed to pass through the valve is by-passed through a pipe 42 to a flue box 20 through which it is conducted by a pipe 43 which terminates in a flue 21, the emerging stream of air drawing the combustion gases from the combustion chamber 12 through the duct 19, flue box 20 and into the flue 21. In Fig. 1, air is drawn from the exterior of a building through a duct 45 and the flue extends to an external terminal 47. The invention may be applied to a hot-water boiler, Figs. 2, 3 and 4, not shown. As shown in Fig. 5, it is applied to an air-heating stove. The stove comprises a control cabinet 60 housing the air-control equipment and also a metering device 55 for the oil supply to the vaporizing burner 11. Air from the fan 37 is delivered into an air jacket 64 which communicates with the burner chamber 10 via the valve 30 situated in one wall of the jacket adjacent to the burner chamber 10. A pipe 68 (equivalent to the pipe 43 in Fig. 1) discharges the excess air into the exhaust connection leading to the outlet terminal 47. Provision is made to encase the whole installation, and the control cabinet may be mounted in a retaining wall to draw air through louvres 62 in a cover-plate 61 of the control cabinet. In a further modification the oil burner is replaced by a gas burner, the air supply system being as hereinbefore described.
Patent GB-710498-A (GB)
Title: Suspension polymerisation of organic compounds
IPC: C08F2/44
Filed: 1951-03-05
Abstract: In the pearl polymerization of one or more unsaturated organic compounds containing a CH2 = C< group, e.g. styrene, methyl methacrylate, vinyl acetate, and styrene with acrylonitrile, in suspension in an aqueous medium, finely divided titanium dioxide is used as a stabilizing agent, e.g. in amount of 0.1 to 1 per cent. of the system.  The process may be carried out under increased pressure, using a catalyst, e.g. benzoyl peroxide.  A salt, e.g. sodium chloride, may be added to the aqueous medium to aid the formation of the monomer suspension.  White pigmented pearls are formed and further white or other pigments and dyes may be added if desired.
Patent GB-1169992-A (GB)
Title: Resistance Welding Machine
IPC: B23K11/06
Filed: 1967-02-03
Abstract: 1,169,992. Welding by pressure. MESSER GRIESHEIM G.m.b.H. 3 Feb., 1967 [16 Feb., 1966], No. 8332/67. Heading B3R. A resistance welder having a frame including a vertical pillar and an upper electrode carrying arm mounted transversely on top of the pillar includes a transformer in the frame which is connected to the upper electrode and a lower electrode by connecting bars extending out of the frame downwardly through an opening in the arm. A pillar 2 of rectangular cross-section is welded to a base 3 and supports an arm 1 of U-section with its open side downwardly and closed at its ends by covers 16, 17. The upper roller electrode 8 is mounted on the arm 1 for rotation by a motor 19 through gearing 20 and is connected to a lifting device 21. The lower roller electrode 7 is mounted at the free end of an arm 4 adjustably mounted in a guide rail 5, a device 6 providing vertical adjustment. The transformer 12 is arranged in the arm 1 above the pillar 2 and is connected to the lower electrode by a bar 9 which extends through the open side of the arm 1 alongside the pillar 2 to the arm 4. The electrode 7 is not insulated relative to the machine frame. The transformer is connected to the electrode 8 by a U-shape bar portion 10 joined to a U-shaped resilient connector 11 which portion and connector project from the open side of the arm 1.
Patent GB-420139-A (GB)
Title: Process for the production of saponaceous pastes, salves, creams or the like
IPC: A61Q19/00
Filed: 1933-02-21
Abstract: Saponaceous pastes or creams for use as cosmetics and similar purposes, are prepared by saponifying stearin (triglyceryl stearate) with caustic potash and working up the resulting soap, without further addition of water, with a relatively large proportion of water repellant substances.  Water-repellant substances specified are: fatty oils such as almond, cod-liver, fish, colza, linseed, poppy, olive, earthnut, castor, sesame, or coconut oil, wool fat, petroleum jelly, turkey red oil, spermaceti, paraffin oil, tallow, essential oils, resins, bone oil (pyridine) and waxes.  The compositions may contain up to 70 per cent of these substances. Glycerin, syrups, sulphite lye, glycol, triethanolamine or alcohol may be added as plasticizers.  Other additions specified are hormones, vitamins, drugs, casein, sera, carbohydrates, insulin, wood or coal tar products, colloidal sulphur silver or mercury, organic or inorganic salts such as bismuth nitrate, flour, talc, or vegetable extracts.ALSO:Cosmetics, face creams, &c. and similar preparations are prepared by saponifying stearin (triglyceryl stearate) with caustic potash and working up the resulting soap, without further addition of water, with a relatively large proportion of water repellant substances.  Specified water-repellant substances are: fatty oils such as almond, cod-liver, fish, colza, linseed, poppy, olive, earthnut, castor, sesame or coconut oil, wool fat, tallow, petroleum jelly, turkey red oil, spermaceti, paraffin oil, essential oils, resins, bone oil (pyridine) and waxes.  The cosmetics &c. may contain up to 70 per cent of these substances. Glycerin, syrups, sulphite lye, triethanolamine, glycol or alcohol may be added as plasticising agents.  Other specified additions are, hormones, vitamins, colloidal sulphur, silver or mercury or organic or inorganic salts, drugs, alkaloids, insulin, sera carbohydrates, wood or coal tar products, inorganic salts such as bismuth nitrate, flour, talc, vegetable extracts or albuminoid substances such as casein.
Patent GB-527897-A (GB)
Title: Improvements in or relating to shock-absorbing struts for aircraft
IPC: B64C25/50
Filed: 1939-02-07
Abstract: 527,897. Aircraft landing gear. STEVENS, A. H. (Cleveland Pneumatic Tool Co.). Feb. 7, 1939, No. 5341/40. Divided out of 527,490. [Class 4] [Also in Group XXXII] A shock-absorbing strut for an aircraft undercarriage comprises a pair of telescoping cylinders each provided with a sliding bearing fixed to the inner end thereof, and a cam on each of said bearings adapted to engage each other at a point near the end of the extension stroke of the cylinders to rotate the cylinders to a pre-determined aligned position as the extension stroke continues. A bush 17 keyed to one cylinder 10 of a shock absorber has a cam surface 45 adapted to co-operate with a similar cam surface 18 on a sleeve 14 secured to an inner cylinder 13 of the shock absorber so as to limit the extension and centre the wheel as the fully extended condition is approached. The lower end of the cylinder 13 is formed with an integral boss 29 within which is rotably mounted a spindle 31 of a wheel fork 32. Two cam rings 35, 36 respectively secured to the boss and slidably keyed to the spindle are pressed together by a spring 39 to effect the centring of the wheel fork. A metering pin 25 co-operates with an orifice 24 in a housing 22. Oil and compressed air may be introduced through a filler tube 27.