baber/WOPTO huggingface dataset:
Patent GB-347763-A (GB)
Title: Improved process in the manufacture of calcium carbide
IPC: C01B32/942
Filed: 1930-02-04
Abstract: Carbide sludge and coal are subjected to a suitable heat treatment with simultaneous mixing to produce a mixture of quicklime and semi-coke in correct proportion for feeding direct to a furnace for the manufacture of calcium carbide.  Pitch may also be added to the mixture before carbonizing and the wet carbide sludge and/or coal may be subjected to a preliminary drying.  The presence of lime during the carbonization decreases the amount of tar formed but increases the yield of gas and semi-coke.  The apparatus described in Specifications 224,568 and 273,528, [both in Class 55 (i), Coking &c.], may be employed. Specifications 2820/95, [Class 1, Acids, alkalies, &c.], and 133,101, [Class 1 (ii), Inorganic compounds, other than &c.], are also referred to.
Patent GB-249284-A (GB)
Title: Improvements in or relating to telephone systems
IPC: H04Q3/00
Filed: 1925-02-11
Abstract: 249,284. Automatic Telephone Manufacturing Co., Ltd., (Automatic Electric Co.). Feb. 11, 1925. Automatic exchange systems. - A drop-back selector is provided with shaft springs 8, 9, operated on one or more levels to prevent the selector from dropping back. The release magnet 36 controls contacts for holding open the circuit of the rotary magnet 56 during dropping back independently of the shaft springs, and for grounding the incoming c-wire after the selector is released until it is fully restored, and at the same time disconnecting the switching relay to prevent its energization by this ground. In an embryo system, Fig. 1, of up to ten offices of which only one (that reached over the fourth level of selector D) serves more than 1000 lines, the selector D is of the above kind and drops back for all first digits other than 4. Operation by a first digit other than 4. Line relay 22 and release relay 23 pull up, and the digit is repeated to vertical magnet 47. Springs 35, 37, 54 change over, and at the end of the digit the relapse of series relay 24 energizes release magnet 36 over 35, 37, 8. The release magnet locks itself over 38 and holds open the rotary circuit to make the drop back independent of springs 8, 9. When the wipers reach normal, relay 21 pulls up in series with the release magnet over its lower winding (which has hitherto been short-circuited at 35), opens the circuit, and locks itself over its upper winding. A standard double-wound relay in this position has a tendency to buzz owing to the fact that it pulls up its armatures before the flux is sufficiently built up to enable the holding winding to be effective. This is avoided by means of the shunt resistance shown or (less satisfactorily) by a series resistance. Alternatively the lower winding may have fewer turns than usual. Operation by second digit or first digit 4. Owing to the fact that the springs 8, 9 are off normal or the relay 21 is operated, the relapse of the series relay, instead of energizing the release magnet, energizes the rotary magnet 56 (stepping relay 25 having been previously energized and locked up in the usual way) and hunting takes place in known manner. When an idle line is found, switching relay 26 causes the relapse of relays 22, 23. Release. The relapse of relay 26 energizes the release magnet 36 over 45, 35. The selector is held busy over 38, 27, 45 (relay 21 having been released at the same time as relay 26), until the wipers reach normal.
Patent GB-1464593-A (GB)
Title: Internal combustion engine with means for compensating for air density variation
IPC: F02M7/28
Filed: 1974-01-28
Abstract: 1464593 Spray carburetters, air density compensation ACF INDUSTRIES INC 28 Jan 1974 [9 Feb 1973] 03895/74 Heading F1H The Specification is identical to that of Specification 1464591 which describes the use of a bellows sensitive to changes in air density and temperature to modify the air/fuel ratio of the mixture delivered by a carburetter and the operation of vacuum-powered devices associated with the engine. The claims of this Patent are directed to an I.C. engine having a vacuum motor which is operated by the suction created by the natural aspiration of the engine, the vacuum motor having a working chamber to which suction is applied through a passage, and the engine also including an attachment which modifies the degree of suction in the working chamber by admitting ambient air to the passage, the attachment comprising a housing the interior of which is in communication with the ambient air, a plate pivotally mounted in the housing, control means operatively coupled to the plate to impart pivotal movement to the plate when a change in the pressure or temperature of the ambient air occurs and metering means including a metering element operatively connected to the plate so as to be movable thereby, said metering element determining the size of an orifice through which air from the interior of the housing can flow to the passage.
Patent GB-694363-A (GB)
Title: Improvements in electrical control magnets
IPC: H01H50/16
Filed: 1950-02-15
Abstract: 694,363. Electromagnetic relays. VIGREN, S. D., BROBERG, W. O. W., and ZANDER, R. A. Feb. 15, 1950 [Feb. 16,1949; Nov. 9, 1949; Nov. 11, 1949], No. 3924/50. Class 38 (v) In a relay having an E-shaped core or yoke with a winding 10 on the middle limb of the E and an armature adapted to bridge the gap between the central and outer legs the armature is pivoted about an axis that is comparatively near to the actual bridging portion of the armature. The arrangement produces a relatively low "pick-up" current. In the form shown in Fig. 5, the armature 9 is a U-shaped member the legs of which are short and pivot on the legs of the E-shaped core being held in position by angle pieces 17, a resilient wire bow 18 and a bow 20. Plates 14 of magnetic material are arranged on the centre limb of the core so that the cross-sectional area of this will be of the same order as the total cross-sectional areas of the legs. The armature actuates studs 25 which actuate contact-spring sets arranged on the two side limbs of the E-shaped core. In a modification, Figs. 9-16 (not shown) the pivoted armature is attached to an end plate of the magnet winding and winding and armature may be bodily adjustable along the core. In other modifications the legs and side limbs of the core are in different planes. The armature may also pivot on the central instead of on the side limbs of the core. It may also pivot about an axis lying outside its own plane. Fig. 20 shows a modification in which the armature pivots about the extreme end portions of the yoke. There may also be arrangements in which the armature becomes more or less saturated during operation so that the centre of attractive force shifts relative to the armature axis during operation.
Patent GB-849283-A (GB)
Title: Releasable safety joint for well strings
IPC: E21B17/06
Filed: 1958-02-06
Abstract: 849,283. Shaft couplings. WAGGENER, K. E., McCLINTOCK, R. A., and THOMPSON, R. E. Feb. 6, 1958, No. 3965/58. Class 80 (2). A releasable coupling between telescoping members 11, 12 at the lower end of an oil well drilling string comprises helical lugs 42 in the outer member 12 which are introduced helically into, and locked at the closed ends of complementary helical grooves 38 in the inner member 11 by axial projections 65 on a spring - loaded locksleeve 50 axially slidable in the outer member 12. During the helical coupling movement the projections 65 ride on a shoulder 80 at the open end of the helical grooves 38 until the helical lugs 42 reach the ends of the grooves 38, whereupon a spring 58 advances the lock-sleeve 50 and its projections 65 enter axial grooves 40 at the mouths of the helical grooves 38, preventing release of the lugs. The next upper section of the well string has a sliding splined joint, and release of the above coupling is effected by introducing through that section a tool comprising a rod 86 having outwardly spring-pressed pivoted arms 88, which spring into a recess 70 in the lock-sleeve 50, permitting the latter to be raised out of locking engagement, whereupon the coupling can be released by helical movement. Sealing rings 52 and 61 are provided. In Fig. 7 (not shown) two sets of helical lugs and grooves are spaced axially and the outer member is provided with an axial slot through which a hooked end of a release tool may pass to engage a recess in the lock-sleeve. The release-tool is pincer-like with one jaw formed as a hook and the other as an arcuate plate adapted to slide on the outer member. In Fig. 10 (not shown), the locksleeve has a rod fixed thereto which rod passes through a hole bored in the outer member and has at its upper end a hook which may be engaged by any suitable tool for raising the lock-sleeve.
Patent GB-643461-A (GB)
Title: Improvements in automatic filling machines for bottling liquids by vacuum
IPC: B67C3/16
Filed: 1947-02-11
Abstract: 643,461. Bottling. CHELLE, P. L. Feb. 11, 1947, No. 4002. Convention date, Aug. 14, 1943. [Class 125(ii)] An automatic rotary filling machine for bottling liquids by vacuum, comprising a central collector or subdivided into compartments connected on the one hand to delivery spouts and on the other hand to a vacuum pump, is characterized in that the collector comprises a distributing member putting each of the compartments in turn in communication with the vacuum pump throughout the period during which the corresponding bottle is being filled, and, when the filling is completed, putting each compartment on the one hand in communication with the outer atmosphere and, on the other hand, with a direct return conduit leading to the liquid supply tank of the machine, so as to deliver thereto any small amount of liquid which may have been sucked into the said compartment of the collector at the end of the filling process. As shown, when a delivery spout is lowered on to a bottle 48, engagement of the bottle neck with a conical head 29 compresses spring 36 to close a venting valve 37, whereafter tube 30 slides up tube 6 against the action of spring 41 to uncover vacuum aperture 45 and liquid aperture 46. Aperture 45 communicates via tube 7 and pipe 9 with one compartment of a collector 8 which rotates with the machine and co-operates with a stationary distributor plug 11. During filling the collector compartment is connected via passages 23, 18 and 16 to a vacuum pump. Upon completion of filling, the spout is raised, apertures 45 and 46 are closed by tube 30, and valve 37 opens to vent the bottle to atmosphere via channel 47 and aperture 46, after which the conical head 29 is withdrawn from the bottle. As aperture 46 is closed, the collector compartment is vented to atmosphere via channel 22 and also connected through channel 24 to outflow pipe 28 which returns to liquid supply tank 1 any liquid trapped in the compartment of the collector 8. Specification 535,247 is referred to.
Patent GB-555432-A (GB)
Title: Improvements in apparatus for ascertaining the wear on grinding discs in grinding machines
IPC: B24B49/18
Filed: 1942-03-26
Abstract: 555,432. Automatic control systems. ROTHELI, R. March 26, 1942, No. 4030. Convention date, Feb. 11, 1941. [Class 38 (iv)] [Also in Group XL] The wear of the working edge F of a grinding wheel W is detected by a photo-electric device comprising a lamp Q directing a beam of light L over the edge F and a cell Z in the projection of the beam adapted to detect changes of beam intensity due to wear of the edge. Lenses and a diaphragm with a slit may be used in the beam. The cell may be connected through an amplifier to a signalling or indicating device or to means adapted automatically to adjust the position of the grinding wheel to compensate for its wear.
Patent GB-588426-A (GB)
Title: Process for the production of improved heat curable sheet materials
IPC: D06M15/423
Filed: 1945-02-19
Abstract: Heat curable thermoplastic sheet material is made by calendering at a temperature not exceeding 100 DEG  C. a mixture containing monohydric alcohol-modified urea-formaldehyde or thiourea-formaldehyde resin and a hydroxy-containing polymeric material having a hydroxyl number less than 275.  The hydroxyl number is the number of milligrams of potassium hydroxide required to saponify the ester groups produced by completely esterifying one gram of the polymeric material.  Suitable such polymeric materials are cellulose esters or ethers, acetals and ketals of polyvinyl alcohol, partially hydrolysed polyvinyl acetate and hydrolysed interpolymers of vinyl acetate with, e.g. ethylene, and preferably the hydroxyl number is between 100 and 170.  Suitable alcohol-modified urea-formaldehyde or thiourea-formaldehyde resins are those described in Specification 483,399.  Alcohols containing from 1 to 6 carbon atoms are most suitable and the ratio of urea (or thiourea): formaldehyde: combined alcohol is between 1 : 1.5 : 0.5 and 1 : 3 : 2.  The amount of resin used is preferably from 3 to 40 per cent of the weight of the hydroxyl-containing polymeric material. Pigments, fillers and plasticisers may be incorporated in the compositions.  A number of examples are given using polyvinyl butyrals (of hydroxyl numbers 144, 162 and 253), ethyl cellulose (hydroxyl number 140), cellulose acetate (hydroxyl number 101), polyvinyl ketal of methyl ethyl ketone (hydroxyl number 242) and the acetal of partially hydrolysed polyvinyl acetate (hydroxyl number 86) as the polymeric material, and butanol- and methanol-modified urea-formaldehyde resins as curing agents, together with fillers, pigments and plasticisers.  The compositions are calendered at temperatures varying between 40 DEG  and 80 DEG  C. into self-supporting sheets, or are calendered on to anchor-coated fabric, and finally cured by heating.  The compositions may similarly be applied by calendering to paper, wood and metal.  The sheets, for example, coated fabrics, may be heat-sealed before curing. Specifications 544,613 and 572,906 also are referred to.
Patent GB-510891-A (GB)
Title: Improvements in or relating to derivatives or compounds of tannic acid
Filed: 1938-02-09
Abstract: 510,891. Derivatives of polyhydric phenols, particularly tannic acid. BRITISH-UNITED CHEMICALS, Ltd. Feb. 9, 1938, No. 4110. Convention date, Feb. 12, 1937. [Class 2(iii)] Compounds of therapeutic value are prepared by reacting ethylene of propylene oxide ,with tannic acid in solution. Preferably the solution is cooled and an alkaline catalyst is employed. According to the examples ethylene oxide is bubbled through a cooled aqueous solution of tannic acid to which sodium hydroxide, ammonia, monoethanolamine or triethanolamine has been added. The pro.duct is then allowed to stand for some time or is heated in a closed vessel for a few hours. The resulting solution may be neutralized 'with sulphuric acid, the sodium sulphate precipitated with alcohol, the ethylene glycol formed in the reaction removed, and the product evaporated to dryness. The Specification as open to inspection under Sect. 91 also describes the treatment with alkylene oxide of any polyhydroxy phenol, of which gallic acid, digallic acid, pyrogallol, hydroquinone and gallo-tannic acid are also mentioned. This subject-matter does not appear in the Specification as accepted.
Patent GB-970189-A (GB)
Title: Combustion equipment for a gas turbine engine
Inventor: FREEMAN FREDERICK
IPC: F23R3/52
Filed: 1963-01-31
Abstract: 970,189. Gas turbine combustion chambers. ROLLS-ROYCE Ltd. Jan. 31, 1963, No. 4127/63. Heading F1L. Combustion equipment for a gas turbine engine comprises an annular inlet passage receiving air flowing radially outward, an annular combustion chamber of elliptical crosssection with its minor axis extending axially of the engine, angularly spaced dilution air shoots extending into the inlet passage and communicating with the combustion chamber downstream of the combustion zone, and an annular outlet passage discharging the combustion gases in a radially inward direction. The combustion equipment 14 comprises an annular inlet passage 31, containing diffusing and straightening vanes 32, 34, an annular combustion chamber 40, and an annular outlet passage 50 containing nozzle guide vanes 51. Part of the air from passage 31 flows through passage 43 to enter the combustion zone 42 as primary air through plate 44 or secondary air through passage 46. Part also flows through dilution air shoots 35 and holes 41 into the chamber 40. Specification 970,188 is referred to.
Patent GB-1109621-A (GB)
Title: Nuclear fuel particles
IPC: G21C3/62
Filed: 1966-01-31
Abstract: 1,109,621. Nuclear fuel. UNITED STATES ATOMIC ENERGY COMMISSION. 31 Jan., 1966 [8 March, 1965], No. 4154/66. Heading G6C. Spherical refractory UO 2  nuclear fuel particles each have a central closed space occupying most of the sphere. They may be prepared by oxidizing UO 2  particles, mixing with CaOTiO 2  powder, pressing into pellets, crushing, screening, heating the granules in an oxyacetylene flame to form spheroids, cooling, reducing in hydrogen, and screening. The oxidation step may take place in air at 180‹ to 300‹ C. to form a higher uranium oxide. Other additives are CaO-TiO 2 -CaF 2 , TiO 2 , TiO 2 -Nb 2 O 5  and V 2 O 5'  The particles may be embedded in a stainless-steel matrix as described in Specification 993,110 to form fuel elements for use in nuclear reactors or thermionic generators.
Patent GB-233800-A (GB)
Title: New or improved heels for boots and shoes
IPC: A43B21/39
Filed: 1924-02-18
Abstract: 233,800. Martin, W. Feb. 18, 1924. Heels.-A detachable rubber heel having open or closed air spaces on its upper face is retained in a heel-shaped flanged metal plate B by D- shaped projections on the rubber heel entering similar recesses G, Fig. 8, in the vertical flange of the metal plate.
Patent GB-165138-A (GB)
Title: Improvements in spring valves for use outside barrels and other vessels
IPC: B65D51/04
Filed: 1920-02-11
Abstract: 165,138. Bayne, J. Feb. 11, 1920. Addition to 14681/15. Hinged valves; vent pegs, fittings for carrying. -The tap-hole valves for barrels &c., described in the parent Specification, are made with a conical rubber &c. plug a<1>, Figs. 1 and 4, having one or more rubber discs a<2>, preferably integral therewith and with an internal core b, b<1>, Fig. 4, of metal, to which the hinged arm c is secured. The disc or discs a<2> form a tight joint in the hole, as shown in Fig. 1. The arm c is pivoted to a bracket d which is recessed to form a guard for the valve in its inoperative position. The valve is retained in its closed position, as shown, or open, by a laminated spring g operating on the heel of the arm c. The bracket d is provided with drain holes h which also serve to hold wire fittings j to carry spare vent plugs k.
Patent GB-205421-A (GB)
Title: Improvements in or relating to fountain pens
IPC: B43K5/06
Filed: 1923-02-13
Abstract: 205,421. Mitchell, O. Feb. 13, 1923. Reservoir pens. - The barrel 1, Fig. 1, of a, reservoir pen is closed at its rear end by a. gland 4 through which passes a rod 8 into the open end of a cylinder 6 carrying a frictionally-mounted piston 7 arranged so that an airpassage through the piston is opened and closed for filling purposes on reciprocation of the rod, a pipe 5 being provided to establish communication between the interior of the cylinder 6 and the outside air. The piston 7 is mounted' between stops 83, 84 on the rod, 8 which is hollowed out at its lower end and provided with a side aperture 81. The rod 8, when first reciprocated from the position shown, slides through the piston 7 to close the aperture 81, the piston being then moved by the stop 83 and the air compressed in the cylinder 6 escaping through the pipe 5. The air in the barrel is thus rarefied and ink is drawn in through the feed-bar. In reversal of the movement, the rod slides through the piston to uncover the aperture 81 and establish communication between the parts of the cylinder 6 above and below the piston 7, which is then moved by the stop 84. In the modification shown in Fig. 6, the lower end' of the rod 8 is reduced in diameter to leave a passage 71 through the piston, and is provided with a spider to engage the bottom of the piston to permit the passage of air, and with a conical valve 86 to open and close the passage 71.
Patent GB-610021-A (GB)
Title: Improvements relating to combustion apparatus
IPC: F23R3/60
Filed: 1945-02-20
Abstract: 610,021. Gas turbines; axial-flow and centrifugal compressors. POWER JETS (RESEARCH & DEVELOPMENT), Ltd., and FEILDEN, G. B. R. Feb. 20, 1945, No. 4319. [Classes 110 (i) and 110 (iii)] [Also in Group XII] In a combustion chamber for a gas turbine, the flame tube is supported within the air casing by a pair of members connected to the flame tube at substantially diametrically opposite points and connected to the air casing by means adapted to deflect in a direction substantially parallel to the axis of the flame tube. A flame tube 6 is supported with an annular air casing 4, 5 by a pair of members 25 which are pivotally connected at 26 to the flame tube and are connected together and to a link 34 pivoted at 27 to the inner wall 4 of the air casing. The flame tube may be additionally supported either by an additional pair of support members or by a rigid attachment or by both means. The support members of adjacent flame tubes may be combined as shown in Fig. 5 in which the brackets 31 are supported by a V-shaped strut 29A, 29B, pivotally mounted on the bracket 31 at 32 and on the air casing 4 at 30A, 30B. The outlets of the flame tubes may be segmental in form and attached direct to the turbine nozzle ring. The application of the invention to combustion chambers in which one flame tube is connected to two compressor outlets as claimed in Specification 594,285 is also described. The compressor for the plant comprises a multi-stage axial flow section and a centrifugal final stage accommodated in a unitary casing, the general form of the axial flow section being convergent to its outlet to the centrifugal stage. The support members 25 may be flexibly attached to the casing and flame tube.
Patent GB-1484233-A (GB)
Title: Phosphite phosphate their preparation and use
IPC: C08K5/527
Filed: 1976-02-04
Abstract: 1484233 Antioxidants HOECHST AG 4 Feb 1976 [7 Feb 1975] 4357/76 Heading C3P [Also in Division C2] Polymers are stabilized against heat and light degradation by incorporation of the phosphite (I) or phosphate (II) In Example 3, polypropylene is blended with phosphite (I), dilauryl thiodipropionate, calcium stearate, and an ester of bis(4-hydroxy-3- tert-butylphenyl)butanoic acid.
Patent GB-858848-A (GB)
Title: Improvements in hydrogen peroxide adducts of pyridine compounds and process for the manufacture thereof
IPC: C07D213/79
Filed: 1959-02-09
Abstract: The invention comprises the hydrogen peroxide adducts of pyridines having the general formula :  <FORM:0858848/IV(b)/1> wherein R1, R2, R3, and R4 are hydrogen, carboxyl, a C1-6 alkyl, or R1 and R2 together may stand for the divalent butadienylene radical, and the preparation thereof by treating a pyridine of the general formula : <FORM:0858848/IV(b)/2> wherein X stands for carboxyl or aldehyde with hydrogen peroxide.