baber/WOPTO huggingface dataset:
Patent GB-1144762-A (GB)
Title: Improvements in and relating to control circuit arrangements
Inventor: MERRETT John
IPC: H02H9/00
Filed: 1966-03-10
Abstract: 1,144,762. Automatic control systems. MULLARD Ltd. March 10, 1966, No. 10570/66. Heading G3R. In an electric retroactive control system, the error signal is applied to the base of an amplifying transistor 40 the output from which may, for example, control the firing angles of thyristors in a speed control circuit for an electric motor or in a temperature control circuit for a furnace, the base of the transistor being also associated with a voltage dependent resistor 38; on the occurrence of a sudden large variation in error signal the resistor 38 is driven into a non-linear part of its characteristic where it acts as a low impedance substantially to short circuit the error signal and prevent damage to the transistor 40. The arrangement also prevents the generation of a corresponding large change in the control signal, which change could otherwise possibly cause damage to the apparatus under control.
Patent GB-480244-A (GB)
Title: Improvements in or relating to scoring devices for games
IPC: A63F1/18
Filed: 1937-04-09
Abstract: 480,244. Calculating-apparatus. VEAL, L. F., VEAL, S. O. U., METCALFE, W., and FARROW, H. April 9, 1937, No. 10592/36. [Class 106 (i)] [Also in Group XV] In a scoring device for games comprising a board 1 having a circular opening accommodating a freely rotatable scoring disc'3, a portion of which is visible at a sight window 8, a freely rotatable indicator arm 6 is adapted to be coupled to the disc 3 to rotate it about its centre. A stiletto, dart, or the finger may be inserted into one of the holes 5 for this purpose. Geneva mechanism comprising a double starwheel 10, Fig. 3, engaging a notch 9 and pins 12, is used for the hundreds transfer.
Patent GB-250757-A (GB)
Title: Improvements in or relating to pulleys and pulley guards
IPC: B66D3/06
Filed: 1925-04-23
Abstract: 250,757. Vickers, Ltd., and Pierson, R. K. April 23, 1925. Fair - leads; frame pulleys.-Each sheave of a multiple pulley suitable for guiding the control wires on aircraft is enclosed by guards B, Fig. 4, each of which has openings b<2> in the side to permit the entry and exit of the wire at any angle. The guards B may be rotatable on the axle E.
Patent GB-992644-A (GB)
Title: Circuit control by transistor switching circuits
IPC: H03K17/60
Filed: 1962-03-20
Abstract: 992,644. Transistor switching circuits. CHARBONNAGES DE FRANCE. March 20, 1962 [March 1, 1961], No. 10662/62. Heading H3T. In a switching circuit comprising a transistor switch 3 connected in series with a load 1 across an accumulator 2 which supplies current to energize the load when the transistor is switched on, switching means is provided, in one position of which the transistor is rendered conductive and another position of which charging current is supplied to the accumulator, diodes 10 and 11 being so connected into the circuit that no current is supplied to the accumulator when the transistor is rendered conductive and no current is supplied to the transistor when the accumulator is being recharged. Thus with the switchcontact arms in their upper position, current supplied via diode 11 establishes a potential difference across resistor 5 such as to render transistor 3 conductive, diode 10 being at the same time cut off. With the contact arms in their lower position current passes via diode 10 to charge the accumulator and diode 11 is cut off. With the contact arms in an intermediate position transistor 3 remains cut off. the leakage current through the transistor being reduced by the high impedance shown by silicon diode 4 for small currents. The battery 8 and switch 7 may be connected to the transistor circuit via twowire line 6 to provide remote control of the load device 1.
Patent GB-1066293-A (GB)
Title: Polyurethane elastomers
IPC: C08G18/08
Filed: 1964-03-13
Abstract: A polyurethane coating is prepared by applying to a surface a polyurethane forming reaction mixture comprising a solution or dispersion of a prepolymer obtained by reacting an organic polyisocyanate with an active hydrogen containing polymeric material which is at least difunctional and contains at least one -OH group, said prepolymer having a free -NCO content of at least 1% by weight, and a solution or solvent dispersion of a fast diamine (defined) said solutions or dispersions being mixed at the time of application or immediately prior to the time of application of the mixture to the surface.ALSO:A polyurethane coating is prepared by applying to a surface e.g. glass, polyethylene or nylon fabric which may be in the form of a tube, a polyurethane forming reaction mixture comprising a solution or dispersion of a prepolymer obtained by reacting an organic polyisocyanate with an active hydrogen containing polymeric material which is at least difunctional and contains at least one -OH group, said prepolymer having a free -NCO content, of at least 1% by weight, and a solution or solvent dispersion of a fast diamine (defined) said solutions or dispersions being mixed at the time of application or immediately prior to the time of application of the mixture to the surface.  The mixture may be applied by spraying and water treated with a doctor means.
Patent GB-1302806-A (GB)
IPC: G06G7/161
Filed: 1971-04-22
Abstract: 1302806 Divider-multipliers GENERAL MOTORS CORP 22 April 1971 [22 July 1970] 10671/71 Heading G4G [Also in Division H3] A divider-multiplier for multiplying the quotient of two D.C. analogue potentials by a third D.C. analogue potential comprises means for integrating the first two potentials in opposite senses within alternate half-cycles of a reference signal and means for averaging the third potential during the periods occupied by integration of the second potential. As shown, the dividend and divisor signals are respectively negative and positive and are fed from respective sources 10, 20 via respective FET's 40, 50 to the inverting input 16 of an integrating amplifier 15. The multiplier signal is negative and is fed via FET 60 to the inverting input 26 of an integrating amplifier 25 which performs an averaging operation. The reference signal is generated by a multivibrator 6 which provides equal and opposite outputs at terminals 98, 99 as shown in Fig. 3. The reference source 6 is connected in the manner shown to the gate electrodes of FET's 40, 50, 60 which operate as switches. During the first half-cycle of the reference signal (terminal 98 positive), FET's 50, 60 are switched off, FET 40 is switched on, and the dividend signal is applied to and integrated by the amplifier 15 (curve D, Fig. 3). During this halfcycle, the (positive) integrated output is applied to the inverting input 36 of an amplifier 35 operating in open-loop mode. Amplifier 35 is driven to saturation and yields a negative output which is applied as a hold signal to the re-set switch 65 (a FET) of integrator 15. The same output is applied to the base of NPN transistor 70 and renders this transistor non-conductive whereby a positive potential is applied from source 9 via resistor 94 to the gate of FET 60. This potential is insufficient to render the FET conductive whilst terminal 98 is positive. During the next half-cycle, FET 40 is switched off, FET's 50, 60 are switched on and the divisor and multiplier signals from sources 20, 30 are applied to their respective circuits. The amplifier 15 integrates in the negative direction (curve D, Fig. 3) until the output reaches zero. At this point, amplifier 35 switches to positive saturation and closes the switch 65 which re-sets the integrator. At the same time, transistor 70 becomes conductive and a sufficient negative potential is applied to the gate of FET 60 to extinguish it. The length of time which the integrator takes to integrate the divisor signal to zero is proportional to the magnitude of the dividend signal and inversely proportional to that of the divisor signal. Hence it is proportional to the quotient. The multiplier signal is applied only during the negative integrating periods. Hence, the output of the averaging amplifier 25 is proportional to the product of the quotient and the multiplier. The circuit may be modified to cope with inputs having signs other than those exemplified by making use of both the inverting and non-inverting input terminals of amplifiers 15, 25.
Patent GB-976737-A (GB)
Title: Organo tin compounds
IPC: C07F7/22
Filed: 1963-03-18
Abstract: Organotin compounds are prepared by reacting organotin hydrides with olefinically unsaturated hydrocarbons in the presence of a catalyst consisting of AlH3, a complex Al hydride e.g. LiAlH4 or Mg(AlH4)2, or an alkyl Al hydride, e.g. diisobutyl or diethyl Al hydride.  The latter may be formed in situ from a trialkyl Al compound, e.g. triisobutyl or trioctyl Al.  The starting materials may contain aliphatic, cycloaliphatic, or aromatic radicals, and organotin mono-, di-, or tri-hydrides may be used.  1-15 % mole of the catalyst is used, based on the tin. Reaction may be effected, e.g. in an inert solvent such as toluene, octane, cyclohexane and hydrocarbon mixtures, by mixing the reactants and catalyst and heating to 180 DEG C., or by heating the catalyst with the olefin and adding the tin hydride dropwise at the rate of its consumption. After reaction, the catalyst may be hydrolysed or oxidized and removed by shaking with water, acid, or alkali, or by fractional distillation, or the product may be distilled off and the catalyst recovered.ALSO:Organo-tin polymers are prepared by reacting a diene or triene with an organo-tin di- or tri hydride in the presence of a catalyst consisting of AlH3, a complex Al hydride, e.g. LiAlH4 or Mg(AlH4)2, or an alkyl Al hydride. The latter may be formed in situ from a trialkyl Al compound. The reactants may contain aliphatic, cycloaliphatic or aromatic radicals.  Stoichiometric amounts of reactants are used, or an excess of olefin may provide the polymer with unsaturated groups. 1-15 mole per cent of the catalyst is used, based on the tin. Reaction may be effected, e.g., in an inert solvent such as toluene, octane, cyclohexane, and hydrocarbon mixtures, by mixing the reactants and catalyst and heating to 180 DEG C., or by heating the catalyst with the olefin and adding the tin hydride dropwise at the rate of its consumption. After reaction, the catalyst may be hydrolysed or oxidised and removed by shaking with water, acid or alkali, or by fractional distillation, or the product may be distilled off and the catalyst recovered. Examples describe the reaction of di-n-butyl tin dihydride with 1,2,4-trivinyl cyclohexane (Example 8), 1, 7-octadiene (9, 10 and 11), and 1, 5-cyclooctadiene (12); diethyl tin dihydride with divinyl pentene (7); isobutyl tin trihydride with 1, 7-octadiene (14); and a mixture of di-n-butyl tin dihydride and iso-butyl tin trihydride with 1, 7-octadiene.
Patent GB-146071-A (GB)
Title: Improvements in or relating to syringes
IPC: A61M5/20
Filed: 1920-04-17
Abstract: 146,071. Evans, V. D., and Llewellyn, W. G. April 17, 1920. Syringes, hypodermic. Syringes of the type in which the discharge stroke is made by the expansion of a coil spring are provided with a positively-actuated valve for controlling the quantity and rate of discharge. The syringe is filled by raising a liner 4 on the casing 1 by depressing one arm 5 of a bell-crank lever, the other arm of which engages a slot in the liner. The valve 2 attached to the liner is thus lifted and by withdrawing the piston 8 against the action of the spring 7 the syringe is filled. Releasing the arm 5 allows a spring 10 to push the liner 4 forward and close the valve 2. Subsequent pressure on the arm 5 regulates the flow of the contents which are expelled by the spring 7 pressing forward the piston 8. If desired, the coil spring 10 may be omitted and a leaf spring fixed under the arm 5 to keep it normally raised.
Patent GB-106913-A (GB)
IPC: F41G11/00
Abstract: 106,913. Speirs, R. R., (Speirs, G. C. T.). Aug. 29, 1916. Computing gun-sighting corrections.-Apparatus for use in range correction and spotting, whereby the deflection of the shot may be obtained, comprises a slotted bar 1 having a graduated edge representing ranges which are set off from the centre 8 of a disk 3 formed on the end of the bar. Mounted in the slot 2 is a cursor 4 providedwith an index mark 7 and a cord 6 attached at a point 5 which is in line with the centre 8. The end of the cursor is graduated in degrees from the centre 5, and the disk 3 is graduated in degrees and provided with concentric circles at distances apart corresponding to the range markings on the body of the instrument. Pivoted to the centre of the disk 3 is a transparent disk marked to represent a clock face and having corresponding radial lines. In use, the mark 7 is moved to the range, the transparent disk is turned to bring twelve o'clock to the north, and the cord 6 is placed on the intersection of the radial and concentric lines representing the error of the shot, the deflection then being read off on the cursor.
Patent GB-117156-A (GB)
Title: Improved Plant for the Manufacture of Concrete Posts and Blocks.
Inventor: KOOIJ WIJGERT
IPC: B28B1/04
Filed: 1917-07-26
Abstract: 117,156. Kooij, W. July 26, 1917 Tamping-machines; moulding- plant; moulds. - Relates to plant for the manufacture of concrete blocks, posts, &c. Material is fed through a shoot 4 to a drum-mill 1 and is delivered into a hopper 10 fitted with a pair of manually-operated slides 11 beneath which is a receptacle 12 having interior walls 17 adjustable by screws 18. The receptacle 12 is closed during filling by a plate 19 adjustably mounted on a wagon 20 carrying the moulds. Fig. 5 shows a post mould disposed to the left of the plate 19 and a block mould disposed to the right. The post mould comprises longitudinal partitions 22 furnished with hooks to engage I-beams 23 on the wagon 20, which partitions are spaced apart by mould bottoms 25. Transverse partitions 26 rest on the bottoms 25. Screws 27, controlled by bandwheels 28, are connected to the outer partitions. to facilitate stripping of the mould. Frames or strips 19 are provided to form bevelled edges. Longitudinal reinforcements 59 are supported on cross-bars 58 which are withdrawn after setting. The block mould comprises longitudinal partitions. bottoms 29, and transverse partitions 30 connected by projections 32 to a bar 33 at either side. The bars 33 are furnished with a hand-rail 37 and with rollers 34 travelling on rails 35. The lower corners of the partitions 30 are furnished with projections 38. To distribute the material from the mill 1 uniformly along the hopper 10, the hopper is provided with two frames 41 which can be moved longitudinally towards and from each other by rack gearing 42, 43 controlled by hand cranks 45. Inclined plates are arranged at the ends of the hopper to vary the length according to the length of the moulds. In operation, the concrete mass is discharged from the mill 1 into the hopper 10 and distributed by frames 41. The slides 11 are next withdrawn to discharge the material into the receptacle 12, after which the wagon 20 is moved to withdraw the plate 19 and allow the material to pass into one of the moulds. The filled mould is then brought under a tamp 46 carried by rods 47 furnished with lateral projections 48, which are engaged by levers 49 mounted upon a shaft 7. After tamping, the wagon is removed and the moulds are stripped, a feed wagon with empty moulds being brought beneath the hopper 10.
Patent GB-216296-A (GB)
Title: Improvements in means for controlling the delivery of liquids
IPC: A23L3/16
Filed: 1923-04-20
Abstract: 216,296. August, F. C., and Dipple, E. R. April 20, 1923. Combinations of interdependent valves. - A valve device particularly applicable for use in connection with apparatus for treating milk and of the type in which valve boxes fitted with inlet and outlet valves actuated by cams or the like control the supply and discharge to and from a series of tanks so that liquid is, held in each tank for a predetermined period, has a loosely fitting dog clutch between each cam and its operating means to permit a quick opening of the valves. In the form shown, the spring loaded inlet valves 12 are opened by a face cam 16 rotated by a pulley 18 acting through reduction gearing 17, bevel gearing 22 and a dog clutch 21. The outlet valves 13 are opened by a similar cam 15 rotated by a shaft 19 acting through a clutch 20. To ensure a quick opening of the valve a pawl 29 on a shaft 28 reciprocated by a cam 25 acting through a lever 27 engages one or other of the notches 30 on the edge of the cam disc just as it approaches the opening position. The lever 27 may be arranged to engage the cams directly. The valve boxes are held in position bv hand clamps 31 so as to facilitate cleaning.
Patent GB-120219-A (GB)
Title: Improvements in Light Precipitated Chalk and Processes of Making the same.
Inventor: STATHAM NOEL
IPC: C01F11/18
Filed: 1917-07-26
Abstract: 120,219. Statham, N. July 26, 1917. Samples furnished. Calcium carbonate. - Light precipitated chalk having a density of from 16.2 to 9.5 lb. per cubic foot is obtained by disseminating a lime liquor through an atmosphere containing considerable carbon dioxide under pressure. The pressures mentioned are from 20 to 80 lb. per sq. in. above atmospheric, the lighter products being obtained by the use of the higher pressures. Carbonic acid from a lime-kiln 1 passes through a scrubber 3 to a compressor 11 which supplies it by a pipe 12 to a carbonating vessel 7 partly filled with lime liquor from a mixer 13. The liquor is circulated by a pump 28 which draws it from the bottom of the vessel 7 and supplies it at the top by a perforated pipe 32. A second carbonating vessel 8 may be placed in series with the first as shown. The circulation of the liquor by the means above described is not necessary, as in some cases sufficient dissemination may be effected by agitators 35 on a shaft 33. The product is filtered off in a filter 25, dried on shelves in an oven 26, and disintegrated in a disintegrator 27. Specifications 28276/97 and 102,928 are referred to.
Patent GB-421708-A (GB)
Title: Inhalant devices
IPC: A61M16/16
Filed: 1934-04-10
Abstract: 421,708. Medical inhaling and vaporizing apparatus. McGUIRE, C. V., 3420, West Fort Street, Detroit, Michigan, U.S.A. April 10, 1934, No. 10784. [A Specification was laid. open to inspection under Sect. 91 of the Acts, Oct. 11, 1934.] [Classes 81 (i) and 81 (ii)] [See also Groups XI and XXXVI] Apparatus for supplying warm air with or without vaporizer medicament for respiratory purposes comprises a vessel 10, having a re-entrant portion 11 fitting over a spigot 12 on a stand 13, and a rubber or like flexible mask 30 with rubber flap valves 31, 33, connected to the vessel by a flexible tube 28. Air is drawn in through holes 21 in the stand 13 and passes through perforations 20 in a porcelain, mica, or like plate 18 carrying a heating resistance 19 laid sinuously between ribs on the plate and preferably comprising two parts connected through terminals 23 and wires 24 with a switch 35 to give three degrees of heat. The terminals 23 extend through and beneath a mica or asbestos plate 22 which protects them from heat and is further cooled by air passing between portions of the stand spaced by washers 16. The plate 18 is held in an annular recess 17 by a spring ring 25. The stand 13 is provided with a tray like portion and with rubber feet 14. The vessel 10 contains water or other liquid and has a friction fit cover 15 carrying a combination thermometer and handle 26. The vessel and cover are preferably treated with corrosionresisting material. The tube 28 is connected to a tube 27 extending to above liquid level and preferably cut away at its upper part to form two fingers capable of carrying a gauze or other filter. Medicament may be floated on the liquid in a paper or other container 34.
Patent GB-476800-A (GB)
Title: Process for the manufacture of iron, steel and ferrous alloys from pig iron
IPC: C21C1/00
Filed: 1936-04-15
Abstract: Iron, steel, and ferrous alloys are produced by treating a molten pig iron to which alloying ingredients or steel scrap may have been added, at a temperature of 1600-2000 DEG  C., first with sodium sulphate and then with limestone, the treated metal then being cast. Before the treatment with limestone the molten metal may be re-heated to or above its original temperature.  The alloying ingredients, e.g. nickel, chromium, or tungsten, may be melted with the pig iron or introduced in the solid or molten state into the molten metal before, or during treatment or after the treatment with sodium sulphate &c. The iron &c. produced may be hardened by heating to 800-900 DEG  C., and quenching in oil or water.
Patent GB-1268661-A (GB)
Title: Device for receiving slide-in units, in particular drawers
IPC: A47B47/00
Filed: 1969-03-28
Abstract: 1,268,661. Cabinets; joints. SPICHTIG & CO. March 28, 1969 March 29, 1968], No. 10852/69. Headings A4B and A4H. A cabinet or like article for receiving drawers comprises panels 1, 2, detachably inter-connected by connectors 14-19, each panel 1, 2, being provided in its corners with open ended recesses 9 which receives as a close fit respective planar tongues 8 of the connectors, and each connector a planar plate part 7 from which project at least two said tongues 8 disposed in planes perpendicular to the plate part 7, the latter extending on both sides of each tongue 8 in the region of the junction of the tongue 8 with the plate part 7. Vertical panels 2 include longitudinal grooves 4 providing drawer guides. Pegs 5 on longitudinal edges of vertical panels 2 engage apertures 3 in horizontal panels 1 on recesses 6 in adjacent vertical panels 2. The connectors 14-19 may be removed by a tool inserted in an aperture 10 in the panel 2.
Patent GB-683368-A (GB)
Title: Improvements in or relating to electrical impedance units
Inventor: POWLES FREDERICK GEORGE
IPC: H03H5/02
Filed: 1951-05-09
Abstract: 683,368. Electric condensers. STANDARD TELEPHONES & CABLES, Ltd. May 9, 1951, No. 10866/51. Addition to 668,752, [Group XXXV]. Class 37. [Also in Groups XXXV and XL (c)] An electric condenser comprises a stack of discs 1 of insulating material each having a central aperture and two conductive annular coatings 2, 3. The inner coating 2 extends through the central aperture and beyond to form a narrow annulus on the opposite edge whilst the outer coating 3 extends over the outer periphery to form a similar narrow annulus. A number of discs are assembled into a stack to form the condenser, each successive disc alternating with the adjacent ones so that all the inner coatings form one electrode of the capacitor whilst all the outer coatings form the other electrode. One terminal is formed by a conductive sleeve 4 which passes through the central apertures and is riveted over afterwards to clamp the assembly together whilst the other terminal is formed by a metal cup 9 which embraces the outer edges of the assembled discs and has its edges turned over, thus clamping the outer edges of the discs. The completed condenser is then fitted over a conductive spindle forming one terminal of a variable inductance unit as claimed in the parent Specification.
Patent GB-109736-A (GB)
IPC: B62K27/02
Abstract: 109,736. Simpson, W. F. J. Feb. 20, 1917. Guiding vertical play; springs, mounting undercarriages on.- In motor-cycle side-cars in which the side wheel is driven, link mechanism is provided between the axle sleeve and a casing rigidly connected with the frame for taking axial thrust. The casing 11, Fig. 5, is provided with links 12, 13, 16 pivoted at one end to the casing, their free ends being connected by links 14, intermediate points of which are connected by a link 23. The link 23 is provided with arms 15 pivoted to the axle sleeve 7. The sleeve 7 is also provided with links 17, Fig. 6, connected to bell-crank levers 18 connected by a link 20 which is suspended by a tension spring 22. The frame 1, Fig. 2, is provided on each side with links 4 pivoted to members 6 which carry the axle sleeve and are pivoted to spring-controlled triangular frames S. Specification 14931/15, [Class 108 (iii), Springs &c.], is referred to.