baber/WOPTO huggingface dataset:
Patent GB-492520-A (GB)
Title: Improvements in alloy-iron castings for the manufacture of piston-rings, cylinder-liners and the like
IPC: C22C37/10
Filed: 1937-02-15
Abstract: An alloy cast iron used for the manufacture of piston rings, cylinder liners, &c. is produced by centrifugally casting an iron alloy containing more than 2,5 per cent but not more than 3,5 of silicon and a hardening element consisting of chromium with or without molybdenum and/or manganese and controlling the rate of cooling during and after solidification in accordance with the thickness of the casting and the ratio of the hardening element to the percentage of silicon in excess of 2 by controlling the temperature of the mould at the time of casting, extracting the casting at a predetermined temperature and then cooling it in air or other suitable medium so that the casting is substantially wholly pearlitic in structure.  The iron alloy may be produced by melting in a cupola a mixture of phosphoric pig iron returned scrap and steel scrap, transferring the molten iron to a rotary electric furnace and adding the silicon chromium &c. in the form of powdered or crushed ferro-alloy.  The chromium content of the alloy is approximately 0,75 times the amount of silicon in excess of 2 per cent and the whole or part of the chromium in excess of 0,2 present may be replaced by an amount of molybdenum approximately 1,5 times the amount or an amount of manganese approximately equal to 3 times that of the silicon in excess of the amount which is counteracted by the amount of chromium present.  In an example, an iron casting 1/4 inch thick containing 3 per cent of silicon, 0,5 of chromium and 0,6 of molybdenum is cast in a mould whose average temperature is 300-350 DEG  C., the mould being made of unlagged cast iron the mass of which is 16-20 times the mass of the casting.  The casting is left in the mould until its temperature has dropped to 750 DEG  C., e.g. 60-70 seconds, from the time of pouring.  The casting is then extracted and cooled in still air.  The casting may be extracted when at a higher temperature, e.g. 900 DEG  C., and then quenched in a bath of molten lead or salts at a temperature of 600-700 DEG  C. before cooling in air.
Patent GB-963911-A (GB)
Title: New silica gel catalysts,a process for their manufacture and their use
IPC: B01J23/86
Filed: 1961-02-06
Abstract: A catalyst containing silica gel having a surface area from 250-350 sq. in./gm., 18-30% Cu, 0.3-3.5% Cr and 0.5-9% alkali metal is used to hydrogenate (a) diethyl-hexanol adipate to 1:6 hexane diol (b) dibutyl sebacate to 1:10 decane diol (c) ethanol and adipic acid to 1:6 hexane diol (d) 1:6 hexane diol and adipic acid to an unspecified product, and (e) various naturally occurring fatty oils, e.g. coconut oil, sperm oil, and castor oil to the corresponding alcohols. French Specification 889,~91 is referred to.ALSO:In the manufacture of a hydrogenation catalyst silica gel having a surface area of about 250-350 sq.m./gm. is impregnated with such amounts of a Cu compound, a Cr compound and an alkali metal compound that after being dried the silica gel contains from 18-30% Cu, 0,3-3,5% Cr and 0,5-9% alkali metal, the percentages being calculated on the total weight of the catalyst. If desired the alkali metal compound, e.g. Na or K salts, and Cr compound may be replaced by a chromate or bichromate of the alkali metal.  Example 1 describes the impregnation of silica gel with basic copper carbonate, ammonium bicarbonate, chromic anhydride and potassium hydroxide.  French Specification 889,791 is referred to.
Patent GB-1461504-A (GB)
Title: Hall effect device
IPC: H01L27/22
Filed: 1974-01-31
Abstract: 1461504 Hall effect devices INTERNATIONAL BUSINESS MACHINES CORP 31 Jan 1974 [14 Feb 1973] 04505/74 Heading H1K [Also in Division G3] In a Hall effect device comprising a planar semi-conductor body 1 having a region 2 of single conductivity type, the offset, or null, voltage across the sense electrodes 5, 6 is controlled by means of at least one auxiliary electrode, e.g. 8-15, provided on the region 2 between the two spaced non-colinear elongated current electrodes 3, 4 the auxiliary electrode being very small in area compared with either one of the current electrodes. By selecting an appropriate one or more of the auxiliary electrodes 8-15 and varying the control current supplied thereto a wide range of offset voltages may be compensated for. The control current may be provided by an independent source or it may be derived from an amplifier arrangement connected between the sense electrodes 5, 6 which provides a positive or negative feedback signal to the auxiliary electrode, Figs. 4 and 5 respectively (not shown). The latter negative feedback arrangement may provide an automatic compensation for slow changes in the offset voltages without affecting the sensitivity of the device to the relatively fast Hall voltage changes being detected. Each electrode may comprise a printed circuit conductor with or without an underlying diffused sub-region, e.g. 3B, 4B, of the same conductivity type as the region 2. The Hall effect device, together with any associated amplifier arrangements may be fabricated in a single monolithic integrated circuit chip.
Patent GB-579297-A (GB)
Title: Improvements in fuel feeding devices
IPC: F23K3/14
Filed: 1944-03-10
Abstract: 579,297. Screw conveyers. STEVENS, A. H. (Steel Products Engineering Co.). March 10, 1944, No. 4507. [Class 78 (i)] In a screw conveyer for feeding solid fuel from a bin to the retort of a combustion apparatus, the worm 45, Fig. 2, works in a casing 27, which has a long continuous slot 28, Fig. 4, in its top through which project the upper parts of the flights 46. The casing is supported above the bottom of the bin by members 30, 32 and is prevented from bulging either by similarly shaped plates which are welded to it; or by arched members 50, Fig. 5. The worm is made in sections which have a tongue and groove connection with each other.
Patent GB-715403-A (GB)
Title: Method of controlling combustion of a combustible mixture fed to a furnace especially for the production of carbon black
IPC: C09C1/50
Filed: 1952-02-20
Abstract: <PICT:0715403/III/1> In the production of carbon black by the decomposition of fluid hydrocarbons which are injected into and decomposed by hot combustion gases in an enclosed chamber where a mixture of an oxygen-containing gas and gaseous fuel is burnt, fluctuations in the calorific value of the fuel are compensated by maintaining constant the composition and supply rate of the oxygen-containing gas and automatically varying the proportion of gaseous fuel responsive to variations in the specific gravity (and hence the calorific value) of the fuel.  The gravitometer is preferably coupled with and controls an automatic volume control of known type which itself compensates for pressure variations.  In the preferred embodiment shown, a combustible mixture of air from pipe 11 and fuel from pipe 14 is blasted into one end of a combustion chamber 1 through ports 8.  Hydrocarbon to be decomposed is injected into the blast flame at 15.  Control of the fuel is effected by value 19 actuated by motor 20.  The fuel line 14 is provided with a venturi at 21, connected by pipes 27, 28 to an automatic volume control mechanism 26, responsive to pressure variations in the supply line 14, and electrically connected to motor 20.  The set of the control mechanism is chosen by lever arm 30 which is corrected by rod 31 to an arm 32 on a reset control mechanism 33.  The latter is actuated by a gravitometer 22, through which fuel is passed from line 14 by pipe 23 to be discharged at 35.  The volume control arm 30 can be manually adjusted by loosening screw 37 on arm 32.  In operation, when the gravity is constant, a desired constant volume of fuel is fed regardless of pressure variation by means of volume control 26. If the gravity varies, the mechanism 33 resets the lever 30 of the volume control which continues to compensate for pressure variations. The connection between the reset mechanism and the volume control need not be mechanical but may be electrical or pneumatic or a combination of all three.
Patent GB-587033-A (GB)
Title: Improvements in and relating to band brakes and actuating means therefor
IPC: F16D49/12
Filed: 1944-03-13
Abstract: 587,033. Brakes. SELF-CHANGING GEAR CO., Ltd., WILSON, A. G., and MILLER, A. A. March 13, 1944, No. 4655. [Class 103 (i)] Substantially semi-circular brake-shoes 3, 4 are located between the band 2 and the drum 1, the shoe 3 being fixed to the band whilst the shoe 4 is loosely secured to the band and is provided with a lug 5 extending through a slot in the band for attachment to links 5b pivoted to a fixed member 5c. Alternatively, a pair of lugs 5, one on each side of the band, are provided. The shoe 4 is loosely secured to the band 2 by studs 4b having flattened portions accommodated in slots 4c which permit the shoe to slide circumferentially relatively to the band. The shoe 4 may, instead, be secured to the band by a pin or pins passing through a slot or slots in the band, the outer end of the pin being secured to a leaf or other spring bearing on the back of the band. The band is formed at 7, 8 with pairs of spaced cheeks between which are confined compression springs 7b housed in bores in the ends of levers 7a, 8a. The springs may bear directly on the cheeks or piston-like caps may be interposed, the arrangement being such that the band is frictionally constrained, when released, to open concentrically of the drum. The levers 7a, 8a have tails 7d, 8b engageable with stops to limit the swing of the levers. The fluidoperated piston 9 for applying the brake pressure to the end 2b of the band is recessed to receive a split ring 9d, the ring having axial play in the recess. The ring 9d is located in the cylinder by the outward movement of the piston, but it has sufficient friction with the cylinder wall to act as a stop for the piston, on its return stroke, thereby limiting the extent to which the resilience of the band 2 can retract the brake shoes This stop means forms the subject-matter of Specification 587,068. The end 2c of the band is anchored by link 11 pivoted on the cylinder cover lOb.
Patent GB-452012-A (GB)
Title: Improvements in and relating to cathode ray tubes
IPC: H01J29/62
Filed: 1935-02-13
Abstract: 452,012. Cathode-ray oscillographs. NICOLL, F. H., 17, The Drive, Ickenham, near Uxbridge, Middlesex. Feb. 13, 1935, No. 4672. [Class 37] [See also Group XL] In a cathode-ray tube having in succession along the path of the ray a cathode 4, electrodes 8, 9 positive relatively to the cathode for accelerating and directing the electrons, means for deflecting the ray and a screen 11, two values of deflection sensitivity are provided by means of a switch 27 so arranged that in one setting thereof the ratio of the potential of the electrode 9 nearest the screen 11 to the potential of the adjacent electrode 8 is the inverse of the ratio in the other setting. As shown, a rectifier 14 and potentiometer 12, 13 maintains the electrode 8 at 400 volts positive and the 2-pole switch 27 enables the electrode 9 to be maintained at either 200 or 800 volts, good focusing of the ray being secured in both cases. The electrode 9 may be a silvering on the wall of the tube.
Patent GB-1174301-A (GB)
Title: Pyrimidine Derivatives
IPC: C07D239/48
Filed: 1967-01-31
Abstract: 1,174,301. Antihypertensive &c. compositions. UPJOHN CO. 31 Jan., 1967 [21 Feb., 1966], No. 4724/67. Heading A5B. [Also in Division C2] Pharmaceutical compositions having antihypertensive, antifertility, antiviral, anti-inflammatory and central nervous system stimulant activity, for oral or parenteral administration, comprise a compound of formula: or a tautomer thereof, in which R is a radical of formula -NR 3 R 4  wherein R 3  and R 4  are hydrogen, C 1-8  alkyl, C 2-8  alkenyl, C 7-14  aralkyl or C 3-10  cycloalkyl, with the proviso that both R 7  and R 4  are not hydrogen, or R is an aziridinyl, azetidinyl, pyrrolidinyl, piperidino, hexahydroazepinyl, heptamethyleneimino, octamethyleneimino, morpholino or 4-C 1-8  alkylpiperazinyl radical, each of said hetereocyclic radicals having attached as substituents on carbon atom thereof 0 to 3 C 1-8  alkyl groups, a nitrogen atom of each of said heterocyclic moieties being the point of attachment of R to the ring in said formula, R 1  is C 1-8  alkyl, R 2  is hydrogen, C 1-8  alkyl, bromine, chlorine, nitro, amino, R as defined above or a group of formula: in which R 5  is hydrogen, bromine, chlorine, fluorine, nitro, amino or C 1-8  alkyl, and Z is carboxylic acyl or hydrogen; or an acid addition salt thereof, together with a carrier. The compositions may also contain other antihypertensive agents, diuretics, sympathetic blocking agents, ganglion-blocking agents, peripheral vasodilators, reserpine type drugs, tranquilisers, sedatives, anti-histamines and muscles relaxants; specific examples of such agents are given.
Patent GB-1493081-A (GB)
Title: Information reproducing apparatus utilizing light
IPC: G11B7/13
Filed: 1975-02-04
Abstract: 1493081 Reading records photo-electrically SONY CORP 4 Feb 1975 [12 Feb 1974] 4739/75 Heading G1A [Also in Divisions G4 G5 and H1] To read-out a record carrier on which information is recorded as areas having high or low reflectivity, a semi-conductor laser diode having only one resonator reflector is placed adjacent the carrier, so that whenever a reflective area is opposite the laser it forms the second resonator reflector and laser emission results. The emission can be detected photo-electrically and decoded, or can be scanned across and displayed on a phosphorescent screen to form a picture. In Fig. 4 the laser diode 12 has cleaved end surfaces, the one nearer the record carrier 18 being coated with a non-reflecting layer 16. Lenses 19, 21 are provided, and when a reflective area of the record is opposite the diode laser emission occurs. This leaves the laser via the cleaved resonator surface 14' and is detected at 20. The detector signal is demodulated to give the recorded information, and can also be used to control the record and laser movements, Fig. 6 (not shown). The record may be an aluminized plastics disk, and may have a groove engaged by a stylus to track the diode. The reflective areas may be concave to maximize the reflected light.
Patent GB-1147150-A (GB)
Title: X-Ray Apparatus
IPC: G01N23/20
Filed: 1967-02-01
Abstract: 1,147,150. X-ray diffraction apparatus. INTERNATIONAL BUSINESS MACHINES CORP. 1 Feb., 1967 [16 May, 1966], No. 4801/67. Heading H5R. [Also in Division G2] X-ray apparatus, for producing a photographically recordable hologram using X-radiation as the reference beam and the illuminating beam, comprises a source of monochromatic X-radiation, beam forming means for forming the output of the source into a reference beam and an illuminating beam, a substantially perfect crystal, and stressing means for stressing the crystal to alter its lattice spacing, the crystal being so located with respect to the beam forming means that the interference pattern characteristic of an object in the illuminating beam is spread by the stressed crystal to a spatial frequency recordable by photographic means. As shown in Fig. 1 the initial beam is split by passing through a crystal 2, rendered convergent by passing through a second crystal 4, an object 22 being placed in one of the converging beams, the diffracted beams 24 forming an interference pattern with the reference beam 16 which is transmitted through the stressed crystal 6 and recorded on photographic film 26. As shown in Fig. 2, the plates 2, 4 and 6 may be etched out of a single crystal and the stress may be a uniaxial one applied by cramp 36. The crystal may also be stressed by heating.
Patent GB-1164681-A (GB)
Title: Improvements in Chairs, Stools or the like
Inventor: WEBB DOUGLAS ARTHUR
IPC: A47C5/04
Filed: 1967-02-01
Abstract: 1,164,681. Chairs. SALOP COUNTY COUNCIL, NEETA Ltd. and EKCO PLASTICS Ltd. 4 April, 1968 [1 Feb., 1967], No. 4925/67. Heading A4H. A moulded seat 3 has integral lugs 10, 11 provided with blind holes adapted to receive the ends of two tubular seat supports 9 welded to two bowed components 2, 6 extending from the front and rear legs, and, to prevent fore and aft movement of the seat, a tubular locator 13 or a spring clip 14 is sprung through a slot 12 in each front lug 12 to abut the end of a seat support 9 and the end of the blind hole. Alternatively the seat is located by plugs inserted into registering holes in the seat support and lugs or by screws. The two rear legs project above the seat and their upper ends are disposed in blind holes 17 in a moulded chair back 8 and are held therein by studs inserted into registering holes in the legs and chair back or by screws.
Patent GB-199424-A (GB)
Title: Improvements in and relating to magnetos
IPC: H02K21/14
Filed: 1922-02-20
Abstract: 199,424. Hollister, F. L., and Vandervell & Co., Ltd., C. A. Feb. 20, 1922. Magneto-electric machines.-A magneto is provided with an armature having coplanar poles and a field magnet rotating within the armature comprising a pair of bar magnets or a magnet of U- shaped form of steel of high coercive force so arranged that the flux through the armature is quickly reversed. Fig. 1 shows bar magnets a<1>, a<2> and a stationary armature c having poles d, f. In the modification shown in Fig. 2, laminated polar extensions g<1>, g<2> are provided on the bar magnets and the armature pole f is sub-divided into three smaller surfaces f<1> - - f<3>. The pole d carrying the ignition coil e may be provided with a pole-shoe extending over an angle of less than 90‹. The armature in a modification has two small poles each carrying ignition windings and arranged in V-form.
Patent GB-590918-A (GB)
Title: Methods of manufacturing shoes
IPC: A43B9/14
Filed: 1945-02-28
Abstract: 590,918. Boots and shoes. ROWLEY, H. E. G: (Milius Shoe Co.). Feb. 28, 1945, No. 4995. [Class 17 (ii.)] A shoe insole member is secured at one end to the lower edge of an upper lining member 2 the upper edge of which is stitched to the shoe upper, and at the other end it is secured to the shoe upper. A stiffening element is secured by adhesive in the pocket formed between the upper 4 and the lining member 2, and the upper is then drawn over a last and a sole secured to the upper. A strip 6 of flexible material which forms a platform cover strip is attached to the upper, being turned down and under the platform after the stiffener has been inserted and secured in place. The stiffener may be secured in the toe end in similar manner to that employed for the counter.
Patent GB-1383201-A (GB)
Title: Glass ceramic material
IPC: C03B32/02
Filed: 1971-02-19
Abstract: 1383201 Glass ceramics PILKINGTON BROS Ltd 16 Feb 1972 [19 Feb 1971] 5018/71 Heading C1M In the manufacture of fine-grained glass ceramic material from a thermally crystallizable glass in which the glass is shaped, cooled and subsequently heated to crystallization temperature, the shaped glass is supported against loss of its shape throughout subsequent processing which comprises heating to a temperature T n  between Tg and Tg+ 200 C. where Tg is the transformation temperature of the glass, to develop a uniform dispersion of embryonic centres of incipient crystal growth and then rapidly heating at a controlled rate in the range 30 C./min. to 480 C./min. to crystallization temperature in the range 800 to 1250C. to effect crystal growth. The glass may be held at, or may pass through, the temperature T n . Glass sheet supported on molten tin is disclosed. Glass compositions of the Li 2 OAl 2 O 3 -SiO 2  type are used with nucleating agent P 2 O 5  and/or ZrO 2  or TiO 2 .
Patent GB-652093-A (GB)
Title: Improvements in or relating to retractable undercarriages
Inventor: HANCOCK KENNETH GEORGE
IPC: B64C25/14
Filed: 1947-02-20
Abstract: 652,093. Retractable undercarriages for aircraft. ELECTRO-HYDRAULICS, Ltd. Feb. 20, 1947, No. 5041. [Class 4] An aircraft retractable undercarriage cornprises a subsidiary fluid-pressure jack which is operated in both directions during the raising and lowering of the undercarriage, said jack acting as a motor to assist the main retracting jack when the load is high and acting as a pump which increases the supply of fluid to the main jack' and therefore increases its speed when the load is low, the arrangement being such that during no part of the operation is there any storage of energy. The undercarriage leg 1 is supported at 2 on the aircraft structure and is retracted by a jack 8, the piston-rod 7 of which is connected to a cranked arm 9, 14 fast with the leg 1. A subsidiary jack 15 is connected at 14A to the extremity of the arm 14 and at 15a to the aircraft structure. The cylinder of the jack 8 is attached to a rocker 5 pivoted at 3A to the structure. The upper element of a pair of interconnected back-stays. 3, 4 is also secured to the pivot 3A and with respect to this upper element the rocker 5 is permitted a limited amount of rotary lostmotion so that initial retracting movement of the jack 8 exerts a pull on a rod 11 connected to a pivoted back-stay lock 13 to effect release thereof. Fluid is supplied simultaneously to the jacks 8 and 15 through a shuttle valve 18, Fig. 4, and during the initial stage of the retracting movement the fluid-pressure in the jack 8 opposes the retraction and the fluid is forced back through a pipe 20 into the jack 8. During the final stage of the retracting movement and after the member 14 and the jack 8 have passed their dead-centre positions, the jack 15 assists the jack 8. In an alternative arrangement (not shown) an emergency operating system is included in which the jack 15 is supplied with fluid from a source independent of that supplying the jack 8 and the cylinder of each jack is provided with a floating piston and fluid is supplied to each jack through a hollow piston-rod. In this alternative arrangement the jack 15 is utilized only on normal undercarriage retraction and on emergency lowering, but not on normal lowering. Specification 652,103, [Group XXVIII], is referred to.
Patent GB-1005378-A (GB)
Title: Improvements in or relating to directional aerial systems
Inventor: MILNE KENNETH
IPC: H01Q3/22
Filed: 1963-02-07
Abstract: 1,005,378. Waveguide directional couplers. DECCA Ltd. Feb. 7, 1964 [Feb. 7, 1963], No. 5045/63. Heading H1W. [Also in Division H4] In a directive aerial system (see Division H4) aerial apertures 40 are each coupled by a section 41 to one end of a short waveguide 42 the other end of which is terminated in a matched load 43, and each waveguide 42 is coupled by slots 44 to a main feed waveguide 45 of serpentine form at points separated by directional couplers 48 and dispersive elements 49 (see also Fig. 1, not shown). To provide for other than linear polarization of radiation two systems are utilized and come together at square-section waveguides which feed the horn radiators of an aerial array, Fig. 4 (not shown). Specification 1,005,379 is referred to.