baber/WOPTO huggingface dataset:
Patent GB-773227-A (GB)
Title: Improvements in or relating to silencers for gas streams
IPC: F01N13/00
Filed: 1954-09-21
Abstract: 773,227. Silencers for gaseous currents. COOPER'S MECHANICAL JOINTS, Ltd., and STREETE, C. M. Sept. 12, 1955 [Sept. 21, 1954], No. 27320/54. Class 7 (2): A duct 12 having at all transverse planes along a substantial length thereof a crosssectional area which is small in relation to the peripheral length of the duct is substantially wholly surrounded by a mass of fibrous or porous sound-absorbing material 17 contained in a casing 1, and is arranged to receive the gases at one end from an expansion chamber 7 to deliver at the other end into a secondary expansion chamber 13 from which the gases are discharged through a comparatively narrow outlet. As shown, the duct 12 is formed by a perforated, tubular member the ends of which fit over flanges provided by slots of the same configuration as that of the duct and formed in perforated plates 8, 11, the casing 1 being of elliptical, circular or rectangular cross-section and comprising two parts welded together along flanges 2. The expansion chambers 7, 13 are formed between the ends of the casing and plates 8, 11. The annular space between the duct and the casing is packed with glass wool 17 to a density of four and a half to five pounds per cubic foot, the glass wool being initially packed in paper or scrim to facilitate insertion into the casing, or bonded with phenolic resin or a starch compound and moulded to fit between the casing and the duct; alternatively, the soundabsorbing material may comprise metal, e.g. brass, swarf, steel wool or sintered metals such as porous aluminium. A member 15 of angular cross-section secured to the duct 12 prevents the sound-absorbing material from being blown, by the gas passing through the perforations in the plate 8, to the rear of the silencer. The duct may be flat, cruciform or annular, and divided into several passages in parallel each surrounded by sound-absorbent material ; as shown in Fig. 3, the duct is divided by a perforated plate 14, or two such plates spaced apart by a distance equal to that between the flat faces of the duct are used, the space between the plates being filled with soundabsorbing material and covered at each end by perforated guards. A fishtail may be attached to the outlet pipe 4; the inlet pipe 3 fits inside a pipe 5 secured by a bracket 6 to the casing 1.
Patent GB-228260-A (GB)
Title: Improvements in or relating to leaching systems for copper
IPC: C22B15/00
Filed: 1923-10-31
Abstract: In a leaching process for copper wherein cupric ammonium carbonate is employed as a solvent, as described in Specification 220,720, each batch of material is first leached with an ammoniacal carbonate solution containing sufficient copper in the cupric state to oxidize and render soluble all the copper in the material, and after removing this solution is leached with an ammoniacal solution containing either a largely reduced ratio of copper to ammonia, or no copper. The first leaching solution may be withdrawn from the ore, aerated, and returned for re-circulation through the ore until substantially the whole of the copper which can be removed by this solution has been dissolved.  The second leaching solution, which may act as a displacement wash, may be followed by washing with water, with or without further treatment of the ore with steam to remove the last traces of ammonia.  The second solution may be treated by aeration, and by the addition of CO2, and delivered to a storage tank for use as first solution upon another batch of ore. The material to be treated may be that resulting from the process described in Specifications 185,242 and 190,246 as applied to oxidized copper ore, such as chrysocolla.
Patent GB-228265-A (GB)
Title: Improvements in or relating to electric relays
IPC: H01H71/44
Filed: 1923-11-01
Abstract: 228,265. Reyrolle & Co., Ltd., A., Leeson, B. H., Nalder Bros. & Thompson, Ltd., and Nalder, F. H. Nov. 1, 1923. Retarding and time-limit devices.-In a relay, the inverse time delay action or time lag is adjusted by alteration of the inertia of the rotary moving member of the relay itself, and this alteration is effected by the addition of one or more inertia discs or rings to the spindle of the moving member. The discs may be slotted and placed in a light cup. The relay spindle A carries a very light cup B to which is secured a pin E and in which may be placed one or more than slotted discs F, the slotted part G engaging the spindle A and pin E. The cup B is cut a.way at H to facilitate removal of the discs and carries a contact B<1>, while, the discs are bored at F<1> to compensate for the slot G and produce symmetry of loading on the spindle. The cup is of negligible inertia and the desired amount of inertia may be added by placing the required number of discs in the cup.
Patent GB-1254140-A (GB)
Title: Wide band anti-reflection coating and article coated therewith
IPC: G02B1/11
Filed: 1969-05-30
Abstract: 1,254,140. Anti-reflection coatings. OPTICAL COATING LABORATORY Inc. May 30, 1969 [Sept. 9, 1968], No. 27567/69. Heading G2J. An anti-reflection coating 13 which has substantially no absorption in the U.V. and is thus particularly applicable for a substrate 11 employed in photographic applications comprises at least four layers 16, 17, 18, 19 of alternating low and high refractive indices, the first layer 16 having a low refractive index and an optical thickness approximately a quarter of the design wavelength. The second and fourth layers 17, 19 have approximately equal optical thickness and sandwich the third layer 18 which is relatively thin compared thereto but of a sufficient thickness such that layers 17, 19 function as independant layers. As shown, coating 13 has the low refracture index layers 16, 18 formed from MgF 2  and the high refractive index layers formed from ZrO 2  and is particularly adaptable for use with glass substrates having a refractive index ranging from 1À60-1À89. For glass substrates having a refractive index between 1À50-1À62 the coating is augmented by a fifth and sixth layer having low and high refractive indices respectively and a combined optical thickness of approximately a quarter of the design wavelength. The relative thickness of the fifth and sixth layers which may be formed from MgF 2  and ZrO 2  is chosen such that the combination produces a reflectance approximating or equivalent to that which would be achieved by a single layer having an equal optical thickness and a refractive index intermediate the two layers. Titanium oxide, cerium oxide, proseodymium oxide or mixtures thereof and zinc sulphide may be used for high refractive index layers and silicon oxide, cryolite (Na 3 AlF 6 ) and chiolite (Na 5  Al 3  F 14 ) may be used for low refractive index layers.
Patent GB-275819-A (GB)
Abstract: 275,819. White, J. Oct. 9, 1926. Slabs; roofing slabs.-Sheets or slabs for covering walls and roofs are ornamented to represent brickwork, slates &c., and are formed on the abutting side edges with a depressed or sunk portion A, which is covered by small sheets or tiles 5. The contours of the sunk portion follows the ornamental pattern on the sheets or slabs and is undercut to key with the lower part of the small sheets as shown in Fig. 5. The upper edges of the sheets or slabs are overlapped by the lower edges of the adjacent upper course. and, a bevelled edge engagement 7, 8 is arranged as in Fig. 3.
Patent GB-228864-A (GB)
Title: Improvements relating to valves for pneumatic tyres
IPC: F16K15/20
Filed: 1924-11-18
Abstract: 228,864. Soc. Dubied et Cie. Feb. 6, 1924, [Convention date]. Void [Published under Sect. 91 of the Act]. Tyre valves. - A tyre valve has a cylindrical rubber member 8 surrounded for part of its length by a metal sheath adapted to work in a perforated tubular member 4 screwed into the casing. The member 4 has a conical seat 11 for the valve and is provided externally with a packed conical shoulder 6 adapted to be pressed against a corresponding seat on the casing.
Patent GB-868965-A (GB)
Title: Braking system for railway vehicles
Inventor: BUTLER HENRY JAMES
IPC: B61H5/00
Filed: 1956-09-11
Abstract: 868,965. Combined disc and drum brakes. DUNLOP RUBBER CO. Ltd. Sept. 5, 1957 [Sept. 11, 1956], No. 27703/56. Class 103 (1). A braking system for a vehicle having metal - rimmed wheels 5 adapted to rotate on metal rails, comprises a metal brake shoe 1 whereby the coefficient of friction between shoe 1 and wheel rim 6 simulates approximately the coefficient of friction obtaining between rim 6 and a rail, means to effect engagement of shoe 1 with rim 6, means permitting a limited angular movement of shoe 1 in either direction, and means operable by said movement to actuate a main brake associated with the wheel or with the wheel axle. The shoe 1, pivoted at 2 to a beam 4, is applied to wheel rim 6 by a linkage comprising an arm 12, a link 13 anchored by arm 14 to fixed brackets 15, rod 29, bell-crank 26 pivoted to fixed brackets 28, rod 24, arm 23 secured to a rod 21 rotated by links 18, 19 and piston 20 of a vacuum or pressure actuator 17. The rod 29 has a nut 31 at its lower end to take up shoe wear. The shoe 1 moves the beam 4 tangentially in the direction of rotation of wheels to rock levers 9 and shaft 10 to cause arms 52, Fig. 2, secured to shaft 10, to rotate and move links 51 to rotate member 49 about pivot 50 and move rod 48 and cam member 46, the member 46 forcing one side of cam 47 against a pincer arm 38 carrying friction pad 41 which is moved against a disc 33, reaction on a rod 44, connecting pincer arms 37, 38, drawing the arm 37 and its pad 41 against a disc 32, so applying the main brake. The discs 32, 33 may be integral with the wheel 5 and may be attached to a live axle. On brake release, springs 55, 56, anchored to frame members 57, 58 and to rods 54 at the lower ends of arms 53 secured to the beam 4, return the arrangement to the release position. A spring may be included on rod 44 between the pincer arms 37, 38 to withdraw pads 41 from discs 32, 33. In an embodiment, Figs. 4-6, not shown, the beam carrying the shoe 1 moves to operate a double-acting-master cylinder connected to an hydraulic piston and cylinder mechanism which operates a pincer-type disc brake, the disc being mounted on an axle extension outboard of the wheel. In the Provisional Specification a vacuum cylinder or manual means pivots a lever about a fulcrum to tension a Bowden cable to apply the monitor brake against spring means, the lever fulcrum being movable to vary the mechanical advantage in accordance with load, the main brake could be a disc or drum brake; in the case of a disc brake means are preferably included to compensate for wear. Specification 712,534 is referred to.
Patent GB-482963-A (GB)
Title: Improvements in lock mechanism
IPC: E05B63/24
Filed: 1936-10-13
Abstract: 482,963. Door &c. latches; striking-plates. SLEIGH, H. L., CHESTON, A. S., and BOOTH, J. H. Oct. 13, 1936, No. 27771. [Class 44] A fastening particularly for motor vehicle doors comprises a block 14 slidable parallel with the edge of the door 11 and having a double-toothed catch face disposed transversely with respect to the edge of the door and adapted to engage a cooperating toothed face on a keeper member 17 fixed to the post 18. As shown in Figs. 1, 2, block and keeper have two ratchetform teeth, engagement of a single tooth on each giving a safety catch action, both teeth of each member being engaged when the door is fully closed. The catch face of block 14 is exposed through the lower end of a casing 12 having an attachment plate 13, the block being pressed downwards by springs 20. Movement of the block is limited by a pin 21 on the block extending through a slot 22 into a casing 10 which houses a follower 24 on handle spindle 23 by which the block may be raised to disengage it from keeper 17. In a modification of this arrangement, arm 24, instead of resting against the casing as shown, is normally held against a resilient buffer by the action of a tension spring acting on an upwardly directed arm integral with arm 24, this additional arm having a shoulder behind which a separately actuated pivoted stop may be engaged to prevent release of the fastening. In a further modification, the follower acts on one arm of a pivoted lever, the other arm of which engages an integral projection provided on block 14 in place of pin 21. Fig. 6 shows a form operable by inside and outside handles on separate spindles. Outside handle-spindle 23 carries an arm 36 adapted to engage pin 21, an arm 38 acted on by spring 39, and an arm 35 engaged by an arm 42 on the inside handle-spindle 55 so that block 14 is raised by anticlockwise rotation of the inside handle. Clockwise rotation of arm 42 engages the tail 44 of arm 35 in a slot 45 to hold arm 35 against operation. A spring 47 engages notches 46 to retain spindle 55 against accidental movement from either of its two positions. Spindle 55 may be rotated directly by handle (not shown) or from a remote handle (not shown) by link 43. The upper face of case 12 is inclined to engage With wedge action under a fixed block 49. In a further modification of the above form, arm 38 is disposed above spindle 23 and is acted on by a coiled tension spring replacing spring 39. Spring 47 is omitted and the tail 44 is provided with a lateral tooth adapted to snap into one of two recesses replacing notches 46. Plate 13 of the casing is provided with a flange between which and the upper face of the casing 12 block 49 is received. Block 49 may be yieldingly mounted and held in normal position by a spring. The keeper 17 may be of rubber, its teeth projecting slightly above corresponding teeth formed on the walls of a metal case which holds the block,
Patent GB-1049005-A (GB)
Title: Stabilized polyamide compositions
IPC: C08K3/10
Filed: 1965-06-30
Abstract: Polyamides are stabilized by incorporating therein, preferably during the manufacture of the polymer before or during the polycondensation of the polymer-forming monomers, a stabilizer comprising a lead compound and either copper or a copper compound. Polyamides specified are polyhexamethylene adipamide and polycaprolactam.  Suitable copper compounds are the oxides, halides, borates, phosphates and acetates, preferably copper acetate and suitable lead compounds are lead (II) salts of inorganic or organic acids, preferably lead acetate.  To make polyamide compositions suitable for direct use, the stabilizers are preferably used in quantities corresponding to between 20 and 100 parts by weight of copper and between 20 and 100 parts by weight of lead per million parts of polyamide.  For concentrates which are to be mixed with an unstabilized polyamide these quantities are increased to between 100 and 1000 parts of copper and between 100 and 1000 parts by weight of lead per million parts of polyamide.
Patent GB-1352481-A (GB)
Title: Method of colour photographic processing and compositions therefor
IPC: G03C7/413
Filed: 1972-06-14
Abstract: 1352481 Colour processing FUJI PHOTO FILM CO Ltd 14 June 1972 [14 June 1971] 27916/72 Headings G2C and G2X Pyrogallol-1, 3-dimethyl ether is present in an aqueous solution for processing a colour photographic material, e.g. a developing, fixing, bleaching, blixing or stabilizing solution in an  amount of 0À1-10 g/l to prevent growth of microorganisms. A stabilizing solution (examples being given) also prevents colour fading.
Patent GB-189314-A (GB)
Title: Improvements in and relating to badges and the like
IPC: A44C3/00
Filed: 1921-10-21
Abstract: 189,314. Worley, C. B. R. Oct. 21, 1921. Scoring-apparatus. - A badge: to be worn by spectators at football matches &c is provided with two or more moving portions, by means of which the score of one or both sides may be indicated. The figures show a form suitable for indicating two scores in lowscoring games, such as football and tennis. Pivoted discs C, D project through slots in the casing A of the device so as to be easily turned by the finger, and carry numbers which show through windows B<1>, B<2> in a front plate B. A device with several discs for high-scoring games, such as cricket, is also described.
Patent GB-960529-A (GB)
Title: Display device
IPC: B65D5/42
Filed: 1962-07-20
Abstract: 960,529. Display devices. BRISTOLMYERS CO. July 20, 1962 [Aug. 3, 1961], No. 27988/62. Heading G5C. A display device comprises a container having a transparent envelope partly filled with a liquid and through which is viewed a non-transparent backing sheet. Fig. 5 shows a display device comprising a carton which is made by folding and sticking a blank Fig. 2 (not shown) so as to have an aperture 62 in the front panel, and an opening top. Directly behind the aperture is inserted a transparent envelope 16 of flexible clear plastic which contains a flowable material e.g. as shown a bath oil, so that it will be moved by any slight vibrations. Behind the envelope 16 are stored non-transparent, tearable, prod;.ct containing packages 14 on the face of each of which is printed a scene representative of the product to be sold so as to be viewed through envelope 16 with the liquid in 16 reaching a desired height relative to the printed scene. The envelope 16 has its width and/or height greater than that of the aperture 62 and may be stuck in position by adhesive behind it.
Patent GB-937578-A (GB)
Title: Means for erecting mine roadway supports
Inventor: HEUSNER WILHELM
IPC: E21D11/40
Filed: 1961-08-02
Abstract: 937,578. Tunnels. W. EGGEMANN, and E. VON CAMPENHAUSEN, [trading as HERMAN SCHWARZ KOMM.-GES.]. Aug. 2, 1961, No. 28000/61. Class 85. A portable tunnel-support erecting frame has means to transfer parts of the support to their final positions at the surface of the tunnel. The frame 1 has feet 2, 3, and may be hauled or selfpropelled to a station for a support. A chain 11, driven by a motor 14 along tracks 9, 10 on the frame, has pins 16 to which members 17 may be attached. The part 15 of the support is curved and is clamped to a member 17 which is fixed to a pin so that the part may be hauled over rollers 20 to a position opposite its final position at the surface of the tunnel. The part is transferred to holding devices 21 and finally urged by jacks 24 against the surface of the tunnel. A series of parts may be joined by straps permitting limited movement before the final movement. An arch of curved parts is supported by straight side pillars.
Patent GB-1220596-A (GB)
Title: Linear slot burner
Inventor: DESTY DENIS HENRY
IPC: F23D14/48
Filed: 1967-06-19
Abstract: 1,220,596. Burners. BRITISH PETROLEUM CO. Ltd. 29 May, 1968 [19 June, 1967], No. 28062/67. Heading F4T. A fluid fuel burner comprises one or more elongate corrugated ducts 10, each having a longitudinal exit slit 12 which directs fuel into a combustion zone, portions of the ducts being juxtaposed such that their corrugations meet to form tubes 11 for conveying air to the combustion zone. The exit slit may contain packing consisting of layers of metal gauze or crimped metal foil to increase the exit resistance, and may itself be crimped. In addition to the shape shown a single duct may be formed into a spiral or a number of ducts may be positioned parallel to one another and fed from a common feed. Alternatively (Fig. 4, not shown), the ducts may be arranged in parallel and be interconnected in series by U-shaped couplings (13).
Patent GB-714179-A (GB)
Title: An improved system for regulating the temperature of a heated building or other space
IPC: G05D23/24
Filed: 1951-11-29
Abstract: 714,179. Electric control systems. LANDIS & GYR AKT.-GES. Nov. 29, 1951 [Nov. 29, 1950], No. 28064/51. Class 40 (1). In a building temperature regulating system, wherein the heating energy supply is dependent on external weather conditions and also on an internal factor, e.g., the temperature of hot water used to heat the building, a heated chamber located outside the building and so subject to the weather conditions, contains a temperature sensitive feeler arranged to take up a temperature corresponding to the heat losses of the chamber. As shown, Fig. 1, the chamber 1 is heated by a heater coil 5 in series with contacts 4 controlled by a bimetal strip 2 adjacent the heater, whereby the temperature of the strip 2 remains substantially constant. The temperature of a temperature sensitive resistor (feeler) 6 then takes up a temperature dependent on the heat losses of the chamber and hence on the external temperature. The feeler 6 is arranged in a bridge circuit with a similar feeler 11 responsive to the temperature of the hot water pipe 12, and fixed resistors 9, 10, 13, 14. At normal room temperature the bridge is balanced. Variations in the temperature of either feeler then upsets the balance and through an amplifier 15 adjusts a damper 17 of the water heating boiler in the corrective sense. The bridge may be deplaced by a voltage differential circuit; the amplifier 15 may be electric or magnetic, and automatic switches, safety devices, electric. blowers, &c., may be actuated in lieu of or as well as the damper 17. The chamber may, alternatively, be heated by a heater coil in series with a temperature sensitive resistor inside or outside the chamber, Figs. 2, 3 (not shown), or the heater coil itself may be temperature sensitive, Fig. 4 (not shown). In another construction Fig. 5, the chamber is divided into two portions separated by a thermal insulator 19 carried by a bimetal element. The feeler 6 is located in one chamber portion and a constant energy output heater 5 in the other portion, the arrangement being that as the external temperature falls below the desired room temperature the insulator 19 gradually opens to permit heating of the feeler 6 by the heater 5.
Patent GB-192148-A (GB)
Title: Improvements in and relating to magnesium or like flash powder lamps
IPC: F21K5/00
Filed: 1921-10-25
Abstract: 192,148. Klapprott, H. Oct. 25, 1921. No Patent granted (Sealing fee not paid). Magnesium and like powder lamps. - A magnesium or like flash powder lamp is ignited by a lighted slow match or candle carried by an arm which is moved by spring power to ignite a fuse dipping into the flash powder. In the construction shown in Fig. 2, a candle s is carried by a spring sleeve r on a rack c which may be pulled out to wind up the spring of a clockwork mechanism l. When the rack is released it is drawn inwards by the spring of the mechanism l and the candle ignites a fuse n leading to magnesium powder placed in the removable cover b of a box a containing the clockwork mechanism. In the construction shown in Fig. 5, the arm o carrying the candle slides in a sleeve m in the box a. When a lever catch is operated, a spring f draws the arm and candle inwards to ignite the fuse leading to the magnesium powder.