baber/WOPTO huggingface dataset:
Patent GB-919553-A (GB)
Title: Improvements in or relating to the manufacture of shaped bodies containing silicon carbide
IPC: C04B41/50
Filed: 1960-02-02
Abstract: 919,553. Electric heating resistances. KAN. THAL A.B. Feb. 2, 1960 [Feb. 9, 1959], No. 3693/60. Class 39 (3). [Also in Groups II and V] A refractory material suitable for use as an electrical resistance heating element is formed by heating under carburizing conditions a shaped body comprising SiC and a metallic component containing Mo and Si, the Si content exceeding that required to form MoSi 2 , this excess Si forming SiC in the carburizing treatment. The composition of the initial body falls within the co-ordinates DEF in the Figure, D representing 22% C, 13% Mo, 65% Si, E repre. senting 3% C, 48% Mo, 49% Si and F 10% C, 15% Mo, 75% Si. The initial body may be formed either by compacting a powder mixture of SiC, MoSi 2  and Si, or SiC and a Mo-Si alloy, or by infiltrating a SiC skeleton with a molten Mo-Si alloy. The compact is carburized by heating in carbon monoxide at a temperature of at least 1300‹ C. and then sintered in an oxidizing atmosphere at 1300-1700‹ C. The final carburized element consists of 24-80% SiC and the balance MoSi 2 . Composite resistance elements with an incandescent zone containing 30-45% MoSi 2 , balance SiC, terminal end portions containing 50-65% MoSi 2 , balance SiC, may be made by the process either by compaction of the different powder compositions or by infiltrating with a Mo-Si alloy, a Si-C skeleton having different porosity at the ends and the centre. Specification 791,323 is referred to.
Patent GB-538472-A (GB)
Title: Apparatus for the reproduction of oscillations
IPC: G11B9/08
Filed: 1939-12-28
Abstract: 538,472. Reproducing recorded oscillations. FAIRWEATHER, W. C. (Kollsman, P.). Dec. 28, 1939, No. 3757/41. Divided out of 535,328. [Class 40 (ii)] An apparatus for reproducing oscillations from the electro-static film record described in Specification 535,328 comprises a rotary cylinder 5 with a pair of rollers 6 for feeding the film 2 over and around the roller, an electrode 14 adjacent the cylinder, and a valve amplifier 15 connected between the electrode and the cylinder as shown. Specification 384,528, [Group XXXVII], and U.S.A. Specification 1,891,780 also are referred to.
Patent GB-295337-A (GB)
Title: A means of reducing distortion in telephone circuits
IPC: H04B3/14
Filed: 1927-02-10
Abstract: 295,337. Robinson, C., and Aldridge, A. J., Feb. 10, 1927. Attenuation equalizers; repeating and amplifying systems for telephony. - The whole of the distortion in a telephone system, due to the combination of the transmitting and receiving instruments, the line or lines, and the amplifiers, is corrected by means of artificial cables, resonating-shunts, or equivalent frequency-selective apparatus. The telephone system may include a wireless link. The correcting-means may be associated with the amplifiers, that for compensating the distortion due to line and amplifiers being preferably associated with the line amplifiers, whilst the correcting means for the instruments may be associated with an additional amplifier in a cord circuit. In carrying out the invention, curves are drawn showing the response of average transmitting and receiving instruments at different frequencies through the voice range, and the transmission characteristic of a repeater section of the line. A resultant curve is then obtained from these curves, and the frequency response of the amplifier is then modified to compensate for the distortion indicated by the resultant curve. As shown in Fig. 3, a high-pass filter B and a lowpass filter C are connected in parallel between the line D and an amplifier A. This gives high attenuation for frequencies lying between the critical frequencies of the filters, and by suitable design may be arranged to give a frequency characteristic of the combined instruments, line, and amplifiers. An alternative method, Fig. 5, is to connect the line L1, L2 to the amplifier input L3, L4 through the differential transformer E, to the balanced terminals of which are connected impedances Z1, Z2 so designed that the balance is more correct at frequencies requiring small amplification, and less correct at frequencies requiring large amplification. Specifications 20179/13, 131,056, 154,925, and 173,483 are referred to.
Patent GB-1426855-A (GB)
Title: Trip circuit for a circuit interrupter
IPC: H02H3/08
Filed: 1974-01-28
Abstract: 1426855 Protective arrangements WESTINGHOUSE ELECTRIC CORP 28 Jan 1974 [30 Jan 1973] 03812/74 Heading H2K A protection circuit for a line, which trips a circuit breaker CB in the line in the event of an overload, comprises a current transformer CT1 which senses the current in the line L1 and supplies information to a comparator circuit 12 which compares a voltage proportional to the sensed current with a predetermined voltage and provides a tripping signal, in the event when this predetermined voltage is exceeded, to a trip coil TC1 to trip the circuit breaker, the current transformer supplying power to operate the comparator and the trip coil with means being provided to divert current from the comparator to the trip coil in the event of a tripping signal being provided by the comparator by switching the comparators out of circuit. A timing circuit 30 is provided to determine the delay with which the circuit breaker is tripped. The current transformer output is applied to the comparator circuit at its input terminals AA<SP>1</SP> and produces a voltage across terminals BC, which varies in proportion to the current level in the line, which is compared with a predetermined fixed standard or reference voltage at terminals CD of the comparator circuit. In the event of an overload a signal from the comparator starts a timing operation in circuit 30 which leads to the switching of SCR Q3 to pass current through the trip coil TCl. At the same time a signal is passed via diode D5 to transistors in regulating and switching circuit 20 to switch off the power flowing to the comparator circuit to divert it to the trip coil so that all the power from the current transformer is used for tripping purposes. A three phase version of the circuit is described.
Patent GB-1447710-A (GB)
Title: Propylene polymer support sheet for photographic use
IPC: G03C1/93
Filed: 1974-01-28
Abstract: 1447710 Polypropylene film supports KONISHIROKU PHOTO INDUSTRY CO Ltd and CHISSO CORP 28 Jan 1974 [29 Jan 1973 (2)] 03846/64 Heading C3P [Also in Divisions G2-G3] Supports for photographic materials are made from compositions comprising (1) a propylene polymer as main resin component, (2) 15 to 35 weight per cent of talc, (3) 3 to 15 weight per cent of titanium white and (4) 0À1 to 5 weight per cent of a fatty acid metal salt. The propylene polymer may be a homopolymer or copolymer with a minor proportion of ethylene or other α-olefin, and may be blended with minor proportions of polyethylene, polyisobutylene or ethylene/propylene rubber. The salt may be a lithium, magnesium, calcium, zinc or aluminium salt of stearic, palmitic or oleic acid. The compositions may also contain stabilizers, fillers, antistatic agents, brighteners and plasticizers, and may be formed into sheets by extruding and contacting with a chill-roll. Examples describe sheets made from compositions comprising polypropylene, 2,6-di-t-butyl-p-cresol, tale, titanium white and (1) lithium, magnesium, zinc, sodium, lead, barium and calcium stearate, and aluminium monostearate, monopalmitate and monoerucate; and (2) zinc stearate. The surfaces of the supports may be flame or corona discharge treated.
Patent GB-746799-A (GB)
Title: Method of reducing the melting time of a charge of ferrous metal or alloy thereof in metallurgical furnaces
Inventor: WHITNEY LOREN LLOYD
IPC: C21C5/04
Filed: 1954-02-09
Abstract: The melting time of a charge of ferrous metal or alloy thereof, in a metallurgical furnace, is reduced by directing at the charge a flame and a stream of oxygen and a stream of powdered metallic material which at the melting temperature of the charge undergoes an exothermic reaction.  These streams are maintained till the charge has melted substantially level when the streams of metallic material and oxygen are terminated, heating of the charge by the flame being continued till the charge is refined.  The metallic material used may be Fe or Si or a mixture of these two or a p  mixture of Fe, Ca, Mn, and Si with or without Al.
Patent GB-1144736-A (GB)
Title: Improvements in or relating to parachutes
Inventor: MITCHELL JOHN ROTHWELL
IPC: B64D17/12
Filed: 1967-01-26
Abstract: 1,144,736. Parachutes. G. Q. PARACHUTE CO. Ltd. 29 Dec., 1967 [26 Jan., 1967], No. 3873/67. Heading B7G. A parachute comprises one or more canopies and rigging lines for attachment to a single load, e.g. a parachutist, the or each canopy comprising a crown section 17 and a hem section 20 of the same porosity, and two intermediate sections 18, 19, the one 18 nearer the crown having no or very little porosity, and the remaining section 19 being a gap bridged by tapes or being formed of net or a similar material having a very high porosity. Recommended values for the porosities are specified. The sections 17 ... 20 may comprise concentric rings, Fig. 2, or may be bias cut. Fig. 4, at recommended angles 22, 23, 24 on the gores. A vent opening, with or without a vent ring, may be provided at the apex of the canopy, which may also have openings, possibly between the sections of the gores, for navigational purposes. The material of the canopy may be, or be made, fluorescent, at least in part, and may be illuminated by an ultra-violet light source on the ground.
Patent GB-721590-A (GB)
Title: Improvements relating to processes for refining lead
Filed: 1951-02-16
Abstract: In a process for refining lead by oxidation the barrier layers which form on the surface of the molten metal are constantly removed from the refining furnace together with a portion of the metal being refined and, after the dross has been removed, the pure metal is returned to the furnace.  In carrying out the process, e.g. in a reverberatory furnace, the upper layer of metal together with the oxide layer formed on the surface flows into a container which may be separate from or form part of the furnace. The rate of draining off may be so slow that the oxidic material formed is removed in the form of an oxide layer.  In the receiving container the lead separates from the dross by gravity.
Patent GB-226701-A (GB)
Title: Improvements in hand operated bulletin printing machines
IPC: B41L19/00
Filed: 1924-02-14
Abstract: 226,701. Sheffield, W. K., and Horton, A. J. Feb. 14, 1924. Index type-wheel machines; type-carriages.-A bulletin-typing machine comprises a type-wheel which is movable laterally for letter-spacing and is controlled by an operator at the rear of the machine, the bulletin being typed on a web which is fed into view at the front of the machine. A type-carriage 34, mounted to slide and rock on a shaft 31, supports a type-wheel 38 and an indexwheel 47 which is geared to the type-wheel and is set with reference to a pointer 48 on the typecarriage. For impression, the type-carriage is rocked towards a platen-bar 22, over which passes the web 26, by depressing a handle 50. On releasing the handle, the type-carriage is restored by means of a spring 63 connected at one end to a bell-crank 58 which is pivoted on the typecarriage and is provided with a roller 60 engaging a stationary bar 61. The other end of the spring 63 is connected to an inking-roller casing 55 pivoted on the type-carriage. Aligning for impression.-An aligning-pawl 65 pivoted on the type-carriage 34 co-operates with a toothed wheel 41 on the type-wheel, the pawl being urged towards the toothed wheel by a spring 66, and being normally held in disengaged position by a finger 67 on the bell-crank 58. Letter-spacing mechanism.-The type-carriage 34 is provided with teeth 71, 72, Fig. 6, having bevelled ends 76, 77 co-operating with equidistant rollers 70 on the stationary bar 61. The letterspacing movement is effected in two half-space movements, occurring during the impression and return movements of the type-carriage respectively. The teeth are normally disengaged from the rollers, the tip 77a of the tooth 71 being pointed to facilitate insertion of the tooth into the spaces between the rollers. Word-spacing is effected by sliding the type-carriage to the right, or by raising the carriage without effecting impression. Web feeding and guiding arrangements; linespacing mechanism. - The web 26 passes downwards from a roll 15 over rollers 20, 21 and the platen-bar 22, and then passes upwards, to display the bulletin at the front of the machine, and over a roller 25 to a roller 29 resting on rollers 27, 28. A ratchet-wheel 78 on the roller 27 cooperates with a pawl 80 on a hand-lever 81 which is raised to effect line-spacing. The movement is limited by a stop-pawl 86 which is normally disengaged from the ratchet-wheel by a finger 89 on the hand-lever, but is permitted to engage when the hand-lever is raised. A detent 85 prevents backward movement of the ratchet-wheel.
Patent GB-127025-A (GB)
Title: Activation of Catalysts and Contact Masses.
Inventor: MAXTED EDWARD BRADFORD
IPC: B01J23/70
Filed: 1917-03-17
Abstract: 127,025. Maxted, E. B., and Ridsdale, G. It. March 17, 1917. Hydrogen.-In the production of hydrogen by alternately passing a reducing gas and steam over heated iron oxide, vapour of an alkali-metal compound such as caustic soda'or potash is added to either gas or both, to maintain the reactivity of the iron. The gases may for this purpose be passed over the alkaline compound heated to a temperature higher, say by 100‹ C., than the maximum attained in the reaction.
Patent GB-1129951-A (GB)
Title: Improvements in or relating to the bonding of ceramic members to metal members and of ceramic members to each other
Inventor: CARPENTER FREDERICK CHARLES
IPC: C04B37/00
Filed: 1965-01-29
Abstract: 1,129,951. Ceramic seals ; welding by pressure; brazing. SMITHS INDUSTRIES Ltd. 29 April, 1966 [29 Jan., 1965], No. 3929/65. Headings B3R and B3V. A method of bonding a ceramic to a ceramic or to metal comprises pressing together the surfaces to be joined and causing relative movement between the surfaces transversely to the direction of the applied pressure to form a melt at the surfaces which solidifies, producing the bond. One of the parts may be stationary while the other is rotated or reciprocated, e.g. ultrasonically. In a ceramic-to-metal example, a recess is machined in the metal member and filled with Ti, Zr, Hf or Th braze material or an alloy of any of these when the metal to be bonded is Ni, Cr, Cu, Fe, Mo, Pt, Co or an alloy of any of these. Alternatively, the braze material may be from the Ni group and the metal to be bonded from the Ti group. The braze material may be a powder or, to obviate the need for a recess in one or both faces to be bonded, one or more discs. In a ceramic-to-ceramic example,. the braze material is an alloy or mixture of metals or alloys from both the above Ni and Ti groups. The ceramic material may be forsterite or have a high alumina content. As applied to bonding W or Mo to a ceramic, e.g. forsterite having a glassy phase, without an additional brazing material and in an oxidizing atmosphere, e.g. air, the frictional heating melts the glassy phase of the forsterite, and traces of W-oxide or Mo-oxide formed during heating mix with the glassy phase. Upon solidification, the mixture produces a bond.
Patent GB-808074-A (GB)
Title: Improvements relating to diaphragm valves
IPC: F16K7/12
Filed: 1954-02-10
Abstract: 808,074. Diaphragm valves. SUMNER, L. Feb. 10, 1955 [Feb. 10, 1954], No. 3948/54. Class 135. In a diaphragm valve in which at least part of a flexible diaphragm is movable within a tubular conduit to prevent or restrict the flow therethrough, the passageway defined by the internal wall of the conduit has a straight longitudinal axis and at least half the cross-sectional area of the passageway lies on the side of the axis remote from the diaphragm so that there is a substantially straight flow through the valve in its open position. In addition the upper and lower peripheral surfaces of the diaphragm are parallel and at least a part of these surfaces are curved in planes parallel to the direction of movement of the diaphragm. In Fig. 1, a tubular conduit 1 of circular section has a substantially semi-cylindrical aperture 5 closed by a flexible diaphragm 12 which is clamped to the conduit 1 by a bonnet 21 supporting the usual operating screw 24 and handwheel 25. The diaphragm which may be of natural or synthetic rubber or of a synthetic plastic material has an arched portion 13 bounded by flanges 14, 15 supported on co-planar lips or flanges 9 formed on the outside of the conduit. The arched por. tion 13 has a central portion 18 separated from higher end portions 16, 17 by further arched portions or " pleats " 19, 20 which when the central portion 18 is depressed to close the conduit are distorted to form substantially circular walls extending transversely of the conduit. The portion 18 is depressed by a member 22 with a convex under surface 23. Fig. 5 shows a modification in which the conduit is of circular section at the ends and gradually changes to an oval or flattened oval section at the centre without changing its area. The diaphragm 12 has its upper and lower surfaces at two opposed edges located in a single plane and its upper and lower surfaces at the other opposed edges curved out of this plane. The diaphragm may be a plane sheet of material which is clamped tightly by screws 30 between the conduit and the bonnet 21 after it has been moved to the closed position by the shaped operating member 22 or it may be moulded in the form it occupies when the valve is open. In this case it has a single arched portion 27 at the centre. A stud 29 the head of which is embedded in the diaphragm is secured to the member 22.
Patent GB-1262136-A (GB)
Title: Buoyancy control apparatus for submersible vessels
Inventor: MUNGUET OSCAR FERRER
IPC: F04B25/02
Filed: 1969-01-23
Abstract: 1,262,136. Underwater vessels. O. F. MUNGUET. 23 Jan., 1969 [25 Jan., 1968], No. 3968/69. Headings B7A and B7M. A device for adjusting the buoyancy of a submersible vessel comprises a gas-filled tank 19 in the vessel and maintained at the required pressure by a compressor 1, the compressor 1 being arranged to constantly withdraw gas from the tank and either return it to the tank through a line 14, or deliver it to high pressure bottles 17 for subsequent supply to the tank. The tank 19 is open at its bottom to the water and contains a float 23 having a rod 44 controlling through a lever 24, a valve 27 and a switch 28. The device operates automatically to maintain the vessel at a selected depth. If the vessel is at the selected depth, gas is withdrawn into the firststage cylinder 7 through a line 12 and is returned to the tank through the line 14. Should the vessel descend the float 23 rises, thereby causing opening of the valve 27 whereby gas is delivered to the tank from the bottles 17 via a line 43. In the event of the vessel ascending, the float 23 causes the switch 28 to be actuated and thus operate a solenoid valve 13 so that gas is delivered from the first stage outlet 4 into the second-stage cylinder 8, the line 14 being isolated. The gas discharged from the cylinder 8 charges up the bottles 17. To change the selected depth a switch 26 is actuated to cause an electric motor 25 to re-position the float, whereafter the device automatically operates to establish the vessel at the new depth. The tank 19 may have elastic walls exteriorly subject to the water pressure to cause movement of the rod 44, in which case the float is dispensed with, Fig. 3 (not shown). The vessel may be a converted tanker or aircraft, Fig. 8 (not shown), having fore and aft oil-filled tanks interconnected by a line having a reversible pump for transferring oil from one tank to the other for effecting automatic levelling. A mast for conducting engine air and exhaust is provided. The device may also be used to control the buoyancy of a diver.
Patent GB-820307-A (GB)
Title: Improvements in or relating to loudspeaker enclosures
Inventor: ELLIOTT LLEWELLYN JOHN
IPC: H04R1/28
Filed: 1955-02-10
Abstract: 820,307. Loud-speakers. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 8, 1956 [Feb. 10, 1955], No. 3995/55. Class 40 (4). A vented loud-speaker cabinet is reduced in size without loss of desired resonant qualities by wholly or partially filling the cabinet with kapok or glass fibre. Twin elliptical speakers 2, 3 may be used.
Patent GB-1026450-A (GB)
Title: Web storage device
IPC: G11B23/06
Filed: 1965-01-29
Abstract: 1,026,450. Storing record tapes. STANDARD TELEPHONES & CABLES Ltd. (Bell Telephone Manufacturing Co., S.A.). Jan. 29, 1965, No. 4040/65. Heading G5R. To persuade a random-storage bin (or equivalent endless tape cassette) to store more tape, a thin side-wall 11 is periodically tweaked by motor-driven cam means 7, 8.
Patent GB-1046542-A (GB)
Title: Improvements in or relating to 1-azathiaxanthene derivatives
Inventor: JUCKER ERNST
IPC: C07D495/04
Filed: 1964-01-31
Abstract: The invention comprises compounds of the general formula <FORM:1046542/C2/1> wherein R1 signifies a hydrogen or halogen atom, R2 signifies an alkyl radical containing from 1-4 carbon atoms and x signifies 1 or 2, and their acid addition salts, and the preparation thereof by oxidizing a compound of the formula <FORM:1046542/C2/2> by means of hydrogen peroxide, an organic peracid, an inorganic peracid or a salt thereof, and, if desired, converting the product into a salt with an organic or inorganic acid.  When x in the final product is 1, the oxidation is preferably effected with an alkali metal metaperiodate, e.g. in solution in dilute aqueous acetic acid added over a period of 3-5 hours at room temperature, the reaction being completed by leaving for 3 days at room temperature; alternatively an organic peracid, e.g. perbenzoic acid, or hydrogen peroxide, may be used.  Where x in the final product signifies 2, the oxidation is preferably effected with hydrogen peroxide in the presence of a catalytic quantity of a strong mineral acid, e.g. concentrated sulphuric acid, the reaction being continued for several hours. Therapeutic compositions for use as anti-histaminics, antitussives, anticholinergics or spasmolytics when administered orally, parenterally or rectally comprise a compound of the first general formula above and an inert diluent or excipient.  6 - Halo - 9 - (11 - alkylpiperidylidene - 41) - 1 - aza-thiaxanthenes of the second general formula above (R1 = halogen) are prepared by reacting a 6-halo-1-aza-thiaxanthone with a 1-alkyl-4 - piperidyl magnesium halide, hydrolysing the Grignard complex and treating the resulting 6 - halo - 9 - (11 - alkylpiperidyl - 41) - 1 - aza - thiaxanthydrol with a dehydrating agent.
Patent GB-414431-A (GB)
Title: Improvements in and relating to screening, sifting and grading apparatus
IPC: B07B1/42
Filed: 1933-02-11
Abstract: 414,431. Balancing in machinery. BROADBENT, W., Phoenix Iron Works, Stalybridge, Lancashire. Feb. 11, 1933, No. 4216. [Class 80 (iv).] In screening apparatus, the screens 4, 5 are suspended by links 6, and are driven in pairs from the same shaft 9 by cranks or eccentrics displaced relatively 180‹, the adjacent suspending links of the screens being connected by crossed links 17. The links 17 are connected to points on the links 6 at equal distances above and below the pivotal supports 7 thereof. Preferably a cushioning device is provided consisting of a transverse rod 19 supporting the links 17 where they cross, and in turn supported by rods 20 and compression springs 24. The screens overlap at their adjacent ends and are preferably inclined.