baber/WOPTO huggingface dataset:
Patent GB-947467-A (GB)
Title: Improvements in or relating to radio receiving circuits having automatic volume control
IPC: H03G1/00
Filed: 1962-09-12
Abstract: 947,467. Automatic gain control. PHILIPS ELECTRICAL INDUSTRIES Ltd. Sept. 12, 1962 [Sept. 15, 1961], No. 34840/62. Headings H3T and H4R. The invention relates to an automatic gain control circuit for a radio receiver, in which signals are fed from an aerial coupling circuit 1 to a bridge circuit, comprising the centretapped secondary of a transformer 3, a non- linear resistor comprising a diode 4 and a further resistor 5. This circuit feeds into a transistor 9 in a frequency-changing stage which may be self-oscillating or supplied from a separate local oscillator 10. An automatic gain control voltage is applied to terminals 6, 7 and biases the rectifier 4 towards an impedance value which tends to balance the bridge as the signal increases. Such an arrangement is subject to overloading if the signal is suddenly increased, i.e. before there is time for the gain control voltage to follow the change. To prevent this, according to the invention capacitors 12, 13 are connected across the diode and resistor 4, 5 respectively and the diode arranged to be biased to a low impedance state for small signals. A suddenly increased signal is then rectified by the diode, which is thereby selfbiased to a state of higher impedance, so tending to balance the bridge and automatically reduce the signal applied to the receiver. Capacitors 12 and 13 and blocking capacitors 15, 21 form a low impedance path for local oscillations. A modification is also described in the Specification, in which the bridge is reversed (Fig. 2, not shown), the signal being applied to the join of diode and resistor and fed out via a transformer with a centre-tapped primary. In a further modification (Fig. 3, not shown), the transformer with tapped winding is replaced by a pair of capacitors.
Patent GB-413286-A (GB)
Title: Improvements in, and relating to, cutting tools having renewable and adjustable cutting bits or teeth
IPC: B23B27/16
Filed: 1932-12-08
Abstract: 413,286. Tools and tool - holders. TURTON BROS. & MATTHEWS, Ltd., and FRANCIS, S., Steel, File, & Spring Works, Wentworth Street, Sheffield. Dec. 8, 1932, No. 34850. [Class 83 (iii).] A cutting-bit b is mounted in a groove in the front of a tool shank a by means of a clamping- member d which is serrated at its rear part j to engage corresponding serrations on the shank and is secured by a bolt e passing through a slot or one of a series of holes in the shank head. The back of the bit may be supported against a depending lug h on the clamping member. For obtaining side rake of the cutting edge the shank is provided with inclined supporting faces m for alternative use for right or left-hand cutting.
Patent GB-176162-A (GB)
Title: An improved signalling system for collieries
IPC: B66B19/06
Filed: 1920-12-10
Abstract: 176,162. Anderson, C. S., and Wood, R. Dec. 10, 1920. Hydraulic telegraphs; mine and colliery signals.-Signals are transmitted from the bottom cr intermediate levels of a mine to the engine attendant on the surface by an hydraulic system depending upon the incompressibility of the liquid contained in a pipe or tube connecting the transmitting and receiving instruments. Pro. vision is made for balancing the weight of the transmission-liquid. The rotation of a sending- wheel raises the piston f of a cylinder d through a pinion i and a rack on the piston-rod g. The upper part of this cylinder, connecting pipe e, and the lower part of the receiving-cylinder b, in the engine-room are filled with an incompressible fluid, such as water. The piston b of the receiving-instrument is therefore correspondingly raised, and the arms n, o of the piston-rod m display the transmitted signals u, w through slots in the screens g, v. When the signal " 3 " is sent, the word " men " is shown through the screen v and is held there by a flat spring x, Fig. 3 and a catch y until the signal has been cleared either by the depth indicator or by the attendant withdrawing the cath. The head of water in the pipe e may be balanced by weights a<1>, Fig. 4, hung from a drum z on the spindle of the pinion i; or a compensating pipe b<1>, filled with iiquid, may connect the upper end of the receiving-cylinder b with the lower end of the transmitting cylinder d. A holding-pawl (not shown) may be arranged to engage with recesses, corresponding to different signals, formed on the lower end of the rod g; the pawl is disengaged, to cancel the signals, by means of any convenient moving part of the engine. A pivoted arm r is tilted as the signals u are moved and causes an arm 3 to strike a warning-bell t; simultaneously electric contacts r<1> may be closed to warn the banksman.
Patent GB-191601-A (GB)
Title: Improvements in or relating to vehicle wheels
IPC: B60B9/04
Filed: 1921-12-29
Abstract: 191,601. Beisel, W. J. Dec. 29, 1921. S p r i n g wheels.-Curved springs 15 clamped between hub flanges 11, 20 have their outer ends secured within an inverted channel rim 22 by bolts 30 which also serve to attach an outer channel rim 23. A detachable rim may be secured on the rim 23 by means of transverse bolts 31 and clamps 32. The inner ends of the springs 15 are positioned bv collars 18 having aligned radial slots extending from their inner and outer peripheries, the adjoining full parts of the collars being received in notches 17 in the springs. In modifications, the outer end of each spring is formed into three tongues two of which are bent in opposite directions to seat against the rim 22, the middle tongue being curled to house a transverse bolt; or the outer ends of the spokes mav be formed with ears bolted to the flanges of the rim 22. In the modification shown in Fig. 6, the inner rim comprises a narrow channel portion 41 and side-webs 40 for attachment to the rim 23. The outer ends of the springs are channelled at 44 to embrace the portion 41 and are secured bv bolts 45. Two or more springs, entirely separate or formed on a common inner end, may be arranged side by side, the curvature in alternate springs being opposed. Where separate springs are used, a spacing-collar is fitted between adjacent pairs.
Patent GB-925967-A (GB)
Title: Improvements in or relating to a pressure mould for vulcanising tyres
IPC: B29D30/06
Filed: 1961-09-28
Abstract: 925,967. Vulcanising mould for tyres. LEON H. HERBERT MASCHINENFABRIK. Sept. 28, 1961 [Oct. 7, 1960], No. 34964/61. Class 87(2). In a three part mould for vulcanising new or re-treaded tyres having a movable upper side wall portion 1, a fixed lower side wall portion 2 and a plurality of movable circumferential tyre tread segments 3, the mould is opened by raising portion 1 when co-operating guiding surfaces and means act to move segments 3 radially outwards for a pre-determined distance and then upwards free of the portion 2. Cooperating conical guide surfaces 5 and 19 are coupled through guide pieces 6 attached to movable portion 1 and having a dovetailed tongue 8 slidably engaging a dovetailed groove 9 in segment 3 with the extent of relative vertical motion limited by strip 10 blocking the end of groove 9. Wedge shaped projections 12 engage within circumferential groove 13 of fixed portion 2 with nose 14 in the mould closed position. In closing the mould the surface 20 of segment 3 slides radially inward over surface 21 of nose 14. In opening, the mould segment 3 can follow the upward movement of movable portion 1 when the upper surface of projection 12 is free of abutment with the lower surface of nose 14 and dove-tail tongues 8 contact blocking strip 10.
Patent GB-789451-A (GB)
Title: Improvements in or relating to ventilators
IPC: F24F13/18
Filed: 1954-12-02
Abstract: 789,451. Weathershield for ventilator. DAVIES, L. G. Feb. 22, 1956 [Dec. 2, 1954], No. 34976/54. Addition to 742,246. Class 137 A weathershield 8 is applied to a ventilator as described in the parent Specification, being carried on a mounting ring 9 which is secured to a flange 4 of the ventilator with a gasket 10 interposed. A rib 11 prevents the stream of air emerging through outlet aperture 3 from being deflected into inlet aperture 3<SP>1</SP>. The rib 11 may extend only from the ring 9 to the lower edge of the weathershield 8 and may have a curved portion 12 which deflects upwardly the air stream emerging from outlet 3.
Patent GB-979519-A (GB)
Title: Servo controlled accelerator linkage
IPC: B60K26/04
Filed: 1963-09-04
Abstract: 979,519. Controlling vehicles. BENDIX CORPORATION. Sept. 4, 1963 [Sept. 26, 1962], No. 35006/63. Heading B7H. [Also in Divisions F1 and G3] The position of a fuel control device 12 of the engine of an automotive vehicle is controlled by an atmosphere-suspended servomotor 34, with a control valve 53, connected to an accelerator pedal 16 by linkage including a lost-motion connection 44/52 through which the fuel control device 12 may be actuated should the power source fail. The motor 34 is mounted between a bracket 32 and a pair of pivotal links 42 connected to the motor by pin 44 and is connected to carburetter lever 12 by link 62. Accelerator pedal 16 is operatively connected to motor 34 by member 50 which pivots on pin 46 and has an aperture 52 through which pin 44 passes to provide the lost-motion connection. In operation, when pedal 16 is depressed, edge 108 of lever 50 displaces valve member 82 to the right, first closing the intercommunication between the chamber 110 of motor 34 and atmosphere through passages 106, 84, 82 and 92 when it contacts plug valve 100 and then lifting plug valve 100 from seat 104 to connect chamber 110 to the engine induction manifold through passages 106 and 98 which exhausts chamber 110 and shortens motor 34 until pedal 16 is stopped when plug valve 100 seats on both seat 104 and the end of member 82 closing chamber 110.
Patent GB-1004926-A (GB)
Title: 8-substituted-dibenzo (a,f) cycloocta-1,6-dienes
Filed: 1962-09-13
Abstract: The invention comprises 8-hydroxy-8-(g -dimethylaminopropyl) - dibenzo - [a, f] - cycloocta - 1,6 - diene, 8 - (g  - dimethylaminopropylidene) - dibenzo - [a,f] - cycloocta - 1,6 - diene and its acid addition salts, and their preparation by treating 2-(g -phenylpropyl-) benzoic acid with polyphosphoric acid at an elevated temperature to give dibenzo-[a, f]-cycloocta - 1,6 dien - 8 - one, reacting this with dimethylaminopropyl chloride Grignard reagent to give the 8-hydroxy compound of the invention and, if desired, dehydrating this compound with an acid anhydride, an acid halide or a mineral acid.  8 - (g  - Dimethylaminopropylidene) - dibenzo-[a, f] - cycloocta - 1,6 - diene has tranquillising and anti-depressant activity, and may be used in combination with a pharmaceutical carrier in forms suitable for oral or parenteral administration, for example as tablets, capsules or solutions.
Patent GB-932981-A (GB)
Title: Tungsten-niobium-titanium alloys
IPC: C22C27/00
Filed: 1961-09-29
Abstract: An oxidation-resistant alloy has a percentage composition within either of the following ranges:-  .(a).(b).. .W.75 -95.W.42 -65 .Nb.4.8-24.8.Nb.17.5-42.5 .Ti.0.2-12.5.Ti.7.5-27.5  The alloy may be made by powder metallurgy or arc melting After melting the alloy may be homogenized at 1750-2200 DEG  C. for 1/2 -4 hours.
Patent GB-1281588-A (GB)
Title: Air filter control arrangement
IPC: F24F8/108
Filed: 1969-07-11
Abstract: 1281588 Moving web air filter AMERICAN AIR FILTER CO Inc 11 July 1969 [12 July 1968] 35136/69 Heading BIT [Also. in Division F4] An air filter for air conditioning comprises a web 9 of glass fibre extending across frame 11 from supply roll 4 to take-up roll 8, a downstream air impeller driven by motor 13, a differential pressure switch 27 which lights lamp 31 when the web 9 is sufficiently clogged, and an electric circuit (Fig. 4, not shown) which includes motor 13, lamp 31, switch 27 and a further switch (35) which is operated by movement of the web across frame 11. When lamp 31 lights, the operator inserts a crank in the spindle of roll 8 (Fig. 2, not shown) and turns it to wind web across the frame. Toothed wheel (42) is rotated by contact with the web and moves switch (35) from the position in which it energises motor 13 to a position in which it keeps lamp 31 on. The air impeller stops and switch 27 opens, but lamp 31 remains lit until further web movement brings switch (35) back to its first position, when the lamp goes out and the impeller starts again. Gears (39, 52) determine how much web has to be moved across the frame to complete the cycle of switch (35). The unit includes a heat exchanger 3 downstream of the filter and supplied with fluid to heat or cool the air.
Patent GB-1139922-A (GB)
Title: A method of producing foamed plastics coatings on objects
Inventor: LAUER WERNER
IPC: C08J9/24
Filed: 1966-02-01
Abstract: 1,139,922. Foamed plastics coatings. METALLGESELLSCHAFT A.G. 1 Feb., 1966 [2 Feb., 1965], No. 35171/68. Divided out of 1,139.921. Heading B2K. A foamed plastics coating is produced on an object by heating the object and immersing the heated object in a fluidised bed of a mixture of a powdered foamable plastics and a finely divided agent that is sublimatable. The plastics maybe a synthetic thermoplastic material e.g. a polyolefin such as polyethylene, polypropylene or polybutadiene, polyvinyl chloride, polystyrene, a polyamide, a polyurethane, cellulose acetobutyrate, or a mixture of two or more thereof and/or a copolymer and/or graft polymer of one of the thermoplastics; or a synthetic thermosetting material e.g. a polyepoxide, a phenolformaldehyde, a urea-formaldehyde, a melamine resin, a silicone, an isocyanate-polyester or isocyanate-polyether, or a mixture of two or more thereof and/or a copolymer and/or graft polymer of one of the thermosetting materials, if desired with a hardener and/or cross linking agent. The agent which may be present in amount from 5 to 35% by wt. may be paraformaldehyde. The object may be of metal e.g. aluminium, or of an inorganic or organic material and only part e.g. one side only, may be coated. The object to be coated may be first provided with an undercoating of metal, inorganic or organic material. The plastics powder may contain a dye; pigment; metallic pigment; filler! extender; accelerator; agent for improving resistance to light or heat; plasticiser, glass or asbestos powder or inorganic fibres as a reinforcement, metal oxide, cement or other inorganic substance, or fire inhibiting agent. One or more coatings of plastics, metal and/or inorganic material is/are applied to the foamed plastics coating.
Patent GB-720390-A (GB)
Title: Tampons and like absorbent pads
IPC: A61F13/20
Filed: 1951-05-07
Abstract: A vaginal tampon treated with a polyhydric retention agent as described in the parent Specification is compression stabilized at a volume corresponding to a density less than that which can be stably held by compressing dry untreated fibres.
Patent GB-650708-A (GB)
Title: Improvements relating to pressure-relief valves for pressure cooking vessels or the like
IPC: A47J27/09
Filed: 1947-12-31
Abstract: 650,708. Pressure gauges. KELLER, M. Dec. 31, 1947, No. 35232. Convention date, May 18, 1946. [Class 106 (ii)] [Also in Group XXIX] A pressure-relief valve device, suitable for a pressure cooker, includes visual and acoustic warning signals and a throttling device, the arrangement being such that, on increase of pressure in the vessel, first the visual signal is operated, then the acoustic signal, and finally the relief valve is opened, but the escaping steam is throttled by the throttling device during the initial actuation of the relief valve. In an embodiment, the valve comprises an open-ended casing 23 screwed into the vessel and covered at its outer end by a screwed cap 6, and a piston 2 and sleeve valve 1 project through, and can slide in, an aperture in the cap. Normally, the piston occupies the dotted-line position, but as the steam pressure increases, it is lifted to the full-line position when a mark 9 on the stem of the piston becomes visible. On further increase of pressure, the piston contacts the lower end of the sleeve valve 1 and lifts it so that a small flow of steam takes place up the outside of the sleeve, past a shoulder 14 which constitutes a throttle, and then through coincident grooves 15, 19 and ports in the sleeve and piston, respectively, into the interior of the piston, and so past a whistle 21. At still higher pressures, groove 15 starts to coincide with the exhaust ports 17 in the casing and a throttled downward escape of steam is permitted, the amount escaping increasing as the sleeve is moved further upwards. The piston carries heatresisting lubricant in a groove 13.
Patent GB-907810-A (GB)
Title: Electric circuit-breaker and panel assembly
IPC: H01H71/02
Filed: 1959-10-19
Abstract: 907,810. Automatic circuit-breakers; switches held set and freed mechanically; switch cases. MECHANICAL PRODUCTS Inc. Oct. 19, 1959 [Oct. 27, 1958], No. 35344/59. Class 38 (5). An automatic circuit-breaker having an operating mechanism of known construction is mounted on a panel 3 by insulating screws 47 which engage the ends 35 of terminals 21 from the fixed contacts 19, the arrangement being such that the ends 35 contact conductors 11 formed on an insulating layer 7 by etching away portions of a metal layer 9.
Patent GB-386783-A (GB)
Title: Improvements in or relating to oiling apparatus for lubricating the driving chains of bicycles or the like
IPC: F16N7/02
Filed: 1931-12-21
Abstract: 386,783. Lubricating chains. SELLNOW, O., 38, Pferdemarkt, Gustrow, Mecklenburg, Germany. Dec. 21, 1931, No. 35353. [Class 12 (iii).] The driving-chain of a cycle or the like is supplied with oil from a container a provided with a spring-loaded outlet valve p fitted with a steel brush t, the container being so mounted that, when the chain is at rest, the valve is maintained closed with the brush touching a sagging part of the chain, whereas when the chain is in motion the tensioning thereof causes the valve to tilt on its seating and be maintained open. The cap b of the container has air holes controlled by an under plate adapted to be rotated by means of a handle d so as to control the egress of oil.
Patent GB-1348673-A (GB)
Title: Apparatus for simultaneously feeding a number of webs
IPC: D06B3/34
Filed: 1971-07-28
Abstract: 1348673 Feeding webs MASCHINENFABRIK BENNINGER AG 28 July 1971 [31 July 1970] 35425/71 Heading B8R Webs B1, B2, e.g. of textile material, are fed in side-by-side relationship through treatment stages such as 1, 2, 3 by means of driven rollers 4, 5 positioned between the stages, the webs passing over vertically displaceable individual tensioning rollers 10, 11 which extend across the whole width of the apparatus and which are loaded by a system including respective pneumatic cylinders 15 and linkages 12, 13, 14 to impart a predetermined tension to the webs B1, B2 passing over the rollers. The linkage associated with roller 10 is also mechanically connected to a potentiometer 6 in the circuit of a motor (not shown) driving the rollers 4, 5 so that displacement of the roller 10 caused by stretching or contracting of the web B1 results in adjustment of the potentiometer 6 so that the speed of the driven rollers 4, 5 is altered in a sense to correct for the tension variations, any variations in the effective length of the web B 1 being taken up by movement of the roller 11. Each roller is associated with limit switches 24, 25 which operate to stop the feed or actuate a warning device should either web break or should the tension fall outside a predetermined range. The rollers 10 and 11 may be operatively associated so that movement of one effects the movement of the other (Fig. 2, not shown).
Patent GB-491185-A (GB)
Title: Improved apparatus for preparing very fine lustrous metal particles
IPC: B02C17/00
Filed: 1937-12-22
Abstract: 491,185. Ball mills. ECKART, J. Dec. 22, 1937, No. 35460. [Class 59] [Also in Group XVI] Flat metal particles for making bronze paints &c. are prepared in a ball mill in which is arranged a hammer and anvils. As shown in Fig. 4 metal leaf in a ball mill a is beaten by balls h of unequal size and by a hammer g, pivoted on a stationary axis f arranged eccentrically of the mill axis, the hammer contacting with anvils k during the rotation of the drum. The anvils are fixed to the drum and after being struck by the hammer carry the hammer upwardly until it slips off the anvil and drops onto the next anvil. Air is conveyed to the interior of the drum by a pipe b, Fig. 1, and the wall of the drum is perforated with holes c which are covered by a filter cloth d held in place by perforated plate e secured on the inside of the drum. Air passes through the filter to equalize the temperature and prevent explosion.
Patent GB-343181-A (GB)
Title: Improvements in electric horns
IPC: G10K9/15
Filed: 1929-11-20
Abstract: 343,181. Electric horns. AUSTIN, L. J. F., and CLEAR-HOOTERS, Ltd., Lichfield Chambers, Upper Priory, Birming- ham. Nov. 20, 1929, No. 35461. [Class 40 (iv).] Relates to electric horns of the type in which the sound is produced by the vibration of a diaphragm operated by an electromagnet to which the flow of exciting current is interrupted by mechanism operated by a stem, bar or bracket carried by the diaphragm. The pole pieces are detachable and adapted to be set and clamped in position parallel to the armature and a damping guide spring ensures the parallelism in movement and prevents hammering of the armature on the pole faces. The diaphragm d is secured to the armature g by a bar e the outward movement of which separates contacts i. The stem is guided by a spring plate y between which and the armature is a washer or buffer piece v, the combination damping the movement of the diaphragm and preventing the armature hitting the polepieces. The magnet poles comprise two or more stamped metal sheets each having a shoulder projection o<1> at one corner and a rounded corner opposite it, the metal sheets being assembled by threading them on slotted collars s with adjacent sheets reversed. The projections o<1> with projections at the opposite ends of the sheets render taping of the magnet windings and clamping of the same into position unnecessary. The sheets are apertured for screws p<2> the screws being smaller than the apertures. In assembling the horn, parallel gauge plates are inserted between the armature and the polepieces before the screws p<2> are tightened, to facilitate the " setting " of the poles exactly parallel to the armature. A resonance plate f is provided.
Patent GB-469390-A (GB)
Title: Manufacture of an acid wool dyestuff of the anthraquinone series
IPC: C09B1/34
Filed: 1935-12-23
Abstract: An acid wool dyestuff is made by condensing 2-amino-3,5-dichlorbenzoic acid with 1-amino-4-bromoanthraquinone-2-sulphonic acid.  Examples described the condensation in presence of sodium bicarbonate and cuprous chloride.  The product gives vivid blue tints, fast to light and washing.  2 - Amino - 3.5 - dichlorobenzoic acid is made by treating 5.7-dichlorisatin with caustic soda, and oxidizing with hydrogen peroxide.
Patent GB-1385988-A (GB)
Title: Heat transfer device
IPC: C09K5/04
Filed: 1972-08-01
Abstract: 1385988 Heat pipes PHILIPS GLOEILAMPENFABRIEKEN NV 1 Aug 1972 [4 Aug 1971] 35883/72 Heading F4U A heat pipe uses as working medium an alloy of sodium and mercury having a composition in which the mercury content is between 8 and 20%, preferably 14À8%. A portion of the sodium may be replaced by potassium.
Patent GB-1107529-A (GB)
Title: Thiosulphoalkanoates
IPC: A23K50/15
Filed: 1966-08-10
Abstract: Novel compounds of the general formula HOOC(CH2)nSO2-S(CH2)nCOOH wherein n is 2 or 3 are prepared by oxidizing the corresponding dithiodialkanoic acid HOOC(CH2)nS-S(CH2)nCOOH or the mercapto alkanoic acid HS(CH2)nCOOH with aqueous hydrogen peroxide in an acidic medium, preferably glacial acetic acid, or with an organic peracid in an inert organic solvent at preferred temperatures between 35 DEG  and 40 DEG  C.