baber/WOPTO huggingface dataset:
Patent GB-432742-A (GB)
Title: Improvements in or relating to the cleaning of slow sand filters
IPC: B01D24/20
Filed: 1935-02-14
Abstract: 432,742. Filters. ELLIOT, N. G., Mount Green, Halifax Road, Littleborough, Lancashire. Feb. 14, 1935, No. 7233/34. [Class 46] Apparatus for cleaning sand filters comprises a separating member to be lowered into the sand in situ to separate a portion from the remainder, and means on the separating member to cause a flow of water through the separated portion of the sand comprising jets which remain above the surface of the sand and direct streams of water downwardly on to the sand with sufficient force to disturb and wash the sand to a predetermined depth. The separating member may be open at top and bottom and may consist of an annular partition 1 provided with a platform 2 having a central aperture 3 surrounded by a wall 4. A central pipe 6 is connected by a valve 7 and nozzle 8 to a flexible hose 9. The nozzle 8 has an outlet valve 10. A ball bearing 12 supported by the pipe 6 carries a spindle 13 provided with an adjusting nut 17 and ending in a hollow cone 14 provided with apertures 15 and surrounded by a bush 16. Connected with the hollow cone 14 are tubes 19 provided with drag prongs 22 and with jet branches 20. The partition 1 has an annular external flange 23 and a compartment 24 provided with a fly valve 26 operated by a rod 27. An outlet 29 is connected by a nozzle 30 to a flexible hose 31 leading to a discharge pipe below the level of the water in the filter. The separating member is floated into position and then partly filled with water through the valve 10 until the flange 23 engages the surface of the sand. Water to agitate and clear the enclosed sand is then passed under pressure through the pipe 6, tube 19, and the jets, afterwards passing upwards into the separating chamber and out through the open top of the compartment 24 and the hose 31. The reaction causes the tube 19 and spindle 13 to rotate at a speed which is kept low by the action of the drag prongs 22. When the chamber is to be floated to another position the water in it is discharged through the valve 26. To cover the whole area of the filter, the apparatus is operated in overlapping positions, a floating sectional plank and a clamping jack being provided to facilitate correct positioning. The plank is provided with lateral projections to act as positioning stops.
Patent GB-1488187-A (GB)
Title: Glass-fibre-reinforced polyester moulding compositions of reduced flammability
IPC: C08K3/34
Filed: 1975-02-21
Abstract: 1488187 Flame-retardant polyester compositions BASF AG 21 Feb 1975 [22 Feb 1974] 7306/75 Heading C3R A moulding composition comprises a linear saturated polyester resin, e.g. polybutylene terephthalate; glass fibres to reinforce the resin; a fire-retardant and a particulate, waterinsoluble silicate having a bulk density of more than 100 g./l. and selected from kaolin, calcined kaolin, talc and bentonite particles and glass balls, the silicate preventing burning material dripping from the moulding composition when it comes into contact with an open flame. The water-insoluble silicate may be in the form of powder, granules, flakes, spheres or fibres having a length : diameter ratio less than 50 : 1, the maximum diameter of the particles being less than 40 Ám. The proportions  by weight of the components of the composition are within the ranges 2 to 10% water-insoluble silicate, 10 to 60% glass fibres and 3 to 30% flame-retardant. An aromatic bromine compound or an adduct of a chlorine substituted cyclic diolefin with a cyclic unsaturated compound may be used as the flame-retardant with or without a synergistic compound, e.g. antimony trioxide, or a phosphorus flame-retardant may be used. The polybutylene terephthalate may be modified by replacement of up to 15% molar of the acid by another dicarboxylic acid and of up to 15% molar of the glycol component by another glycol, e.g. ethylene or propylene glycol.
Patent GB-442053-A (GB)
Title: Improvements in synthetic resin composition
IPC: C08G8/28
Filed: 1935-03-08
Abstract: Synthetic resins are prepared by dissolving a fusible phenol-aldehyde condensation product in a partial ester of a monobasic organic acid with a polyhydric alcohol, the ester containing at least two free hydroxyl groups and condensing the product with a polybasic organic acid or anhydride thereof in the presence of a vegetable oil or an inert gas or both.  Natural resins may also be present.  The phenol-aldehyde condensation product may be prepared from phenols such as phenol, cresol, cresylic acid, p-tertiary butylphenol or polynuclear phenols. Partial esters include esters derived from acetic or benzoic acids or the acids obtained from fats, oils or natural resins.  In examples, a resin derived from p-cresol and formalin in the presence of an acid or an alkaline catalyst is dissolved in glyceryl monolinoleate and reacted with phthalic anhydride in the presence of china wood oil with or without the use of a current of carbon dioxide.  The products may be used in the preparation of varnishes or lacquers.
Patent GB-293129-A (GB)
Title: Improvements in or relating to lubricators
IPC: F16N7/02
Filed: 1927-12-16
Abstract: 293,129. McPhee, N., and Williams, P. E. Dec. 16, 1927. Gravity - feed lubricators; liquid level, maintaining. - A lubricator comprises a glass vessel A divided into upper and lower chambers 1, 2 by a. horizontal division plate 32 of concave form provided with a, vertical duct 32<a> and carried by a, central tube 34 screwed at its lower end into a tubular member 33 screwed into a hollow member 3, the lower contracted end of the vessel being secured between the member 3 and a -nut 4<a> on the member 33. while a cover 36 provided with a filling opening normally closed by a spring-pressed cover 44 is secured on the vessel by a member 35 screwed on the upper end of the member 34. Oil passes from the chamber 2 through holes 33a into the member 33 which is provided with a nozzle 33c, the flow from which to an outlet passage 24 may be viewed through sight apertures 31, the flow being controlled by a valve 40 adapted to engage a seat 40<b> in the member 33. The valve is connected to a rod 41 extending through the members 34. 35 and a member 37 screwed into the member 35, a spring 43 being arranged between the valve and the member 37. A knob 42 is pivoted to the upper end of the rod 41, the arrangement being such that when the knob is vertical the valve is maintained open, but when it is turned horizontal the spring maintains the valve closed, the extent of opening of the valve being varied by adjustment of the member 37. The air space 32<b> above the oil in the chamber 2 is in communication with the atmosphere through holes 34<a> in the member 34 and holes 37<b> in the member 37. The arrangement is such that the oil in the chamber 2 is maintained at a constant level, corresponding to the bottom end of the duct 32<a>, by supply from the chamber 1.
Patent GB-1390184-A (GB)
Title: Buoy
IPC: B63B22/02
Filed: 1971-03-19
Abstract: 1390184 Buoys BRITISH PETROLEUM CO Ltd 17 March 1972 [19 March 1971] 7364/71 Heading B7A A buoy comprises an upper shell 1 and a lower shell 2 made of plastics material and joined together in contact to form a hollow vessel. A rigid metal pillar 3 passes through the shells and is welded to metal plates 10, 11 bolted on to the upper lower shells of the buoy where the pillar passes through the respective shell. An eye 6 in the pillar receives cable 8 from a ship. (For Figure see next column,)
Patent GB-1347627-A (GB)
Title: Temperature control circuit
IPC: H02M1/08
Filed: 1972-02-17
Abstract: 1347627 Automatic control of temperature PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 17 Feb 1972 [20 Feb 1971] 7405/72 Heading G3R In a temperature control arrangement current through a heating element 3, Fig. 1, from an A.C. source 1, 2, is controlled by zero voltage switching of a triac 4. At large temperaturedeviations below a desired temperature firing signals occur at both zero going positive and zero going negative crossovers of the AC supply. At smaller deviations below the desired temperature the triac is fired at zero going negative crossovers only so that the triac conducts negative half cycles only. Above the desired temperature no firing signals occur. Thus full, half or power is supplied to the heating element 3. In Fig. 1 the desired temperature is pre-set on a resistor 13 and the actual temperature to be controlled is sensed by an NTC resistor 14 in a first bridge including resistors 13, 14, 15, 16. The bridge unbalance voltage causes transistors 17, 18 to conduct and fire triac 4 via a resistor 19. A second bridge including diodes 7, 8 and resistors 9, 10, has an output which causes a transistor 11 to conduct and affect the unbalance voltage of the first bridge thereby preventing the transistor 17 conducting except at zero crossover passages of the A.C. supply. The first bridge is energized by positive half cycles only via diode rectifier 12 and smoothing capacitor 20. Thus as shown Fig. 2b the amplitudes of successive firing pulses are alternately low and high, being lower at the commencement of positive half cycles of the supply when the charge on C2 is lowest as shown Fig. 2d due to the pulse current drawn by transitor 18. When the temperature deviation is high the bridge 13-16 unbalance is high and all the firing pulses are above a threshold level sufficient to fire the triac. When the temperature sensed approaches, to within a given margin from the desired value the unbalance voltage will be smaller and hence the pulse amplitudes will be lower. Furthermore the amplitude of the firing pulses will be below that threshold level at the beginning of the positive half-cycles as shown Fig. 2c, because of a greatly reduced input voltage to the measuring bridge derived from the charge in capacitor 20 Thus the triac will be fired to conduct each negative half cycle only. When the desire temperature is attained so that the bridge is balanced, all firing pulses are suppressed.
Patent GB-542129-A (GB)
Title: Improvements in or relating to the production of glycollic acid esters
IPC: C07C69/675
Filed: 1940-04-25
Abstract: 542,129. Glycollic acid esters. DU PONT DE NEMOURS & CO., E. I. April 25, 1940, No. 7463. Convention date, April 27, 1939. [Class 2 (iii)] Esters of glycollic acid are made by condensing formaldehyde or a polymer thereof or a formal with a formic acid ester. The reaction may be effected with an acidic catalyst such as hydrochloric, sulphuric or phosphoric acid or boron fluoride, and water and an organic acid may be present. When low esters such as methyl or ethyl glycollate are produced they may be converted into higher esters by ester exchange. The process may be effected in gas or liquid phase at atmospheric or higher pressure such as 5-1,500 atmospheres, and may be continuous. In examples (1) paraformaldehyde. methyl formate, acetic acid and boron fluoride are heated to 150‹ C., the mixture being distilled with excess of methanol to remove un-re-acted formaldehyde as the formal; the residue is hydrolysed with sulphuric acid and converted to the isobutyl ester by distilling with isobutanol; boron fluoride is removed by treatment with sodium fluoride followed by washing with potassium carbonate and then sodium sulphate solutions ; (2) the catalyst is BF 3 2H 2 O and the re-action product is treated with sodium fluoride and benzene, the aqueous layer being removed, extracted with benzene and methyl formate and the extract together with the non-aqueous layer distilled with sodium fluoride, yielding the methyl ester; (3) the n-butyl glycollate is made similarly; (4) a vapour mixture of paraformaldehyde, metbyl formate and HÀCOO. CH 3 ÀBF  3  is passed through a tube containing crushed porous porcelain at 84-104‹ C. the condensate being distilled with methanol, then steam-distilled to hydrolyse the ester to glycollic acid which is then esterified with isobutanol; (5) paraformaldehyde, methyl formate and sulphuric acid are heated at 150‹ C. under pressure, and the isobutyl ester is produced as before.
Patent GB-308255-A (GB)
Title: Improvements in atomisers
IPC: B05B11/00
Filed: 1929-03-08
Abstract: 308,255. Gagnan, E. March 20, 1928, [Convention date]. Single - acting bucket pumps.-An atomizer comprises a stationary part 3 secured to the neck of a bottle provided with a central hollow cylinder 4 having a lateral inlet 18 and a non-return valve 6 at the bottom. A member 1 slides externally on the member 3 and has a central hollow piston 2 sliding in the cylinder 4 provided with a non-return valve 7 from which a passage 8 leads to an orifice 9. A spring 10 resting in a groove 13 normally holds the members apart. On reciprocating the outer member liquid is first drawn into the cylinder 4 and then ejected through the orifice 9 where it is atomized by compressed air delivered through an opening 14. The movement of the member 1 is limited by a pin 12 moving in a groove 11 which is formed at its lower end with a bayonet catch 15. In a modification which can be used only when the bottle is inverted the cylinder 19 is closed at its lower end, the liquid being admitted by the opening 18.
Patent GB-252494-A (GB)
Title: Improvements in coin freed mechanism
IPC: G07F17/04
Filed: 1925-03-21
Abstract: 252,494. Avery, Ltd., W. & T., and Bradley, L. C. March 21, 1925. Weighing-apparatus; exhibiting pictures and the like; coin action, weight.-Relates to coinfreed mechanism for use with indicating or observation apparatus such as weighing-apparatus or apparatus for showing a picture or series of pictures upon the insertion of a coin. According to the invention, as applied to a coin-freed weighing apparatus having a graduated dial 3 the indications on which are viewed through a window 6, the window is closed by a shutter 16 carried by a counterbalanced arm 15 rotatable about the same pivot 11 as a counterbalanced coin lever 10 which is connected to a timed dash-pot 14 and carries a coin-bucket 8. The shutter is displaced from the window when a coin is inserted through a shoot 9 into the bucket 8 and by its weight tilts the lever 10. The shutter is counterbalanced by a weight 17 on an extension 15a of the arm 15. According to the Provisional Specification the dash-pot is of the type described in Specification 244,550, [Class 108 (iii), Springs &c.].
Patent GB-748681-A (GB)
Title: Process for the production of direct positive photographic images by means of the herschel effect
IPC: G03C1/485
Filed: 1954-03-16
Abstract: 748,681. Photographic emulsions. AGFA AKT.-GES. FUR PHOTOFABRIKATION. March 16, 1954 [March 16, 1953], No. 7662/54. Class 98 (2). In the production of direct positive photographic images with the aid of the Herschel effect, the silver halide emulsion used contains a desensitizing compound of the general formula wherein Y completes a heterocyclic six-membered ring, which may carry a fused-on benzene ring and X is a halogen or other acid radical. Small quantities of copper salts may be present. The desensitizing compound may be incorporated at any stage in the preparation of the emulsion, or in the final emulsion layer by bathing or in the developing solution. In examples 1 to 4, 2-mercaptobenzthiazole, copper sulphate, and o-nitrobenzylpyridinium chloride, o - nitrobenzylquinolinium chloride, p - nitrobenzyl - 2 - methylpyridinium chloride, and m - nitrobenzylpyridinium chloride respectively are added to a silver halide emulsion. In example 5, o-nitrobenzylpyridinium chloride and benzimidazole are added to a silver halide emulsion, and in example 6, m-nitrobenzylpyridinium chloride, benzimidazole, and copper sulphate are added to a silver halide emulsion.
Patent GB-831214-A (GB)
Title: Improvements in or relating to a braking device for an apparatus operated by compressed air
IPC: F16K7/02
Filed: 1957-03-07
Abstract: 831,214. Dashpots. REGIE NATIONALE DES USINES RENAULT. March 7, 1957 [March 8, 1956], No. 7672/57. Class 108(3) [Also in Group XXIX] The flow restriction valve 39 for a pneumatic dashpot 33 comprises an elastic element 1 which in its normal position (Fig. 2) permits the flow of air from one side 43 of the dashpot to the other, but when moved by a cam 42 it cuts off the connecting port 13 in the valve body from the output port 12 and permits the air from the port 13 to pass through an orifice 14 of reduced cross-section, thereby producing the dashpot action. The element 1 has a peripheral bead 6 by which it is clamped between a shoulder 16 in the valve body and a recess 17 in a ring 18 which itself is clamped in position by a further ring 22 and a plug 23. The element 1 has a seat 4 which normally engages by the elasticity of the element 1 with a seat 5 on the end of the ring 18. A recess 9 of the element 1 is engageable by a push rod 10 so as to lift the seats 4 and 5 apart and bring a seat 2 of the element 1 into engagement with a seat 3 of the valve body so as to cut off communication between the input and output ports 13, 12. Air flowing in through the port 13 then passes through apertures 8 in the element 1, between the seats 4 and 5, through an orifice 19 and finally out through the reduced cross-section orifice 14 to atmosphere. The orifice 14 may be adjusted by means of a needle valve 31. The movement of the push rod 10 is derived from a lever 45 carrying a cam follower 46 which is adapted to be engaged by the cam 42 at a predetermined point of travel of the piston rod 41a. As shown in Fig. 3, the invention is applied to the regulation of a pneumatic jack which also functions as the dashpot 33. A distributer 36 permits air to be supplied from a conduit 38 to the desired side of the jack piston 41. On movement of the piston in the direction of the arrow 40, the restriction valve comes into operation to restrict the flow between the conduits 44 and 35, when the cam 42 engages the cam follower 46.
Patent GB-980174-A (GB)
Title: Improvements in or relating to papers for use in chromatographic separations
Inventor: KNIGHT COLIN SUTHERLAND
IPC: B65G49/04
Filed: 1961-03-02
Abstract: A cellulose derivative having ion-exchange properties is prepared as follows:  Cellulose is mercerized with sodium hydroxide solution, excess of which is pressed out.  It is then added to benzyl chloride and heated under reflux, washed with acetone and then with water, extracted with alcohol and dried. This product was a benzyl-cellulose with a degree of substitution of 1.0.  It was again mercerized with alkali and excess pressed out. Sodium 2-bromo-ethane-sulphonate was added and the mixture heated, and then washed successively with water, semi-normal hydrochloric acid, water, semi-normal sodium hydroxide and water.  Specification 911,820 is referred to.ALSO:A chromatographic paper contains one or more ion-exchange resins and one or more ion-exchange celluloses uniformly dispersed in it.  The ion-exchange cellulose may be in powder form or in fibrous form, and in the latter case may be the sole fibrous material of the paper. The functional groups of the ion-exchange resin and ion-exchange cellulose may be sulphonic acid groups, phosphoric acid groups, carboxylic acid groups, primary, secondary or tertiary amino groups or quaternary ammonium groups. The ion-exchange cellulose may also contain non-ionisable substituents such as methyl or acetyl.  The ion-exchange resin and the ion-exchange cellulose may be a cation-exchanger and an anion-exchanger respectively or vice versa, or both of the same kind.  When the ion-exchange cellulose is in fibre form, it may be added to slurry of other cellulose fibres, e.g. cotton linters, before they are beaten, and the ion-exchange resin added to the slurry after beating.  When the ion-exchang cellulose is in powder form it may be added with the ion-exchange resin. Specification 911,820 is referred to.
Patent GB-400077-A (GB)
Title: Improvements in or relating to filtering devices
IPC: A47J31/06
Filed: 1933-03-14
Abstract: 400,077. Filters. MELITTA-WERKE AKT.-GES., Minden, Westphalia, Germany. March 14, 1933, No. 7709. Convention date, March 15, 1932. [Class 46.] A filter h having ribs i on tapered side walls is provided with a flat bottom k having ribs l forming passages therebetween leading directly to one or more outlets m on the bottom, some, at least, of the passages between the ribs i leading directly into the passages in the bottom. Circular or other holes or slots may be provided in the side walls. The filter may be made of aluminium or of ceramic material and may be supported in a conical flanged holder or by a ring n formed integral with the filter. A further support o may be provided whereon the filter is rotatably mounted such that the orifices m may coincide with projections q or with orifices in the support for closing or opening the outlet from the filter. The filter paper may be introduced by a conical tool.
Patent GB-500084-A (GB)
Title: Improvements in devices for opening preserve tins
IPC: B67B7/70
Filed: 1938-03-12
Abstract: 500,084. Can - openers. WENZEL, G. March 12, 1938, No. 7746. [Class 66] A device for cutting out the ends of rimmed tins comprises a housing a, Fig. 1, in which is pivotally mounted at n a lever i carrying a cutter k and having a forked part h fitting around a coupling disc g provided on a sleeve c engaging a threaded part of the spindle d which carries the traction wheel f, to which sleeve the operating handle l is attached. Turning of the handle first causes movement of the sleeve to the right, as shown, causing the cutter to enter the end of the tin. The threaded part of the sleeve having now reached the end of the threaded part of the spindle, on further turning the sleeve and the spindle revolve together, causing the traction wheel to turn and carrying the appliance around the tin. To enable the height of the cutter to be adjusted, the pivot n of the lever may be cranked and provided with an extension engageable with one or other of a series of depressions provided on the exterior of the housing. In a modification shown in Fig. 6 the threads on the sleeve and spindle are replaced by an oblique curved channel t and a stop pin u, and in a further modification, Fig. 7, the sleeve c is mounted on a separate, laterally spaced, spindle and the actuation effected by the aid of the pairs of driving wheels v, w. The device may be mounted on a clamp for attachment to a table.
Patent GB-638995-A (GB)
Title: Improvements in and relating to fasteners for laminated driving belts
IPC: F16G5/16
Filed: 1947-03-21
Abstract: 638,995. Driving belts. WHITTLE, O. L. March 21, 1947, No. 7777. [Class 80 (i)] A fastener, for driving belts composed of a series of overlapping strips 17 secured together, is made from one or more pieces of strip metal 14 bent to form a foot or feet 15 at one end and having a flat shank which passes through slots in the strips, the fastener being secured in position by a washer 23. As shown in Fig. 4 the fastener is made of two strips 14 each having a bent-up foot 15. The two parts are secured together back to back and have a hole 18 for receiving a pin 20 for holding the washer 23 in place. The fastener may be formed from a single strip which is folded along or transversely to the shank portion 16. The retaining washers may be slotter to engage a notch 24 on the shank and have one or more projectors 27 to grip the belt to prevent disengagement. Specification 523,337 is referred to.
Patent GB-609420-A (GB)
Title: Improvements in and relating to ventilation of sanitary closets
IPC: E03D9/052
Filed: 1946-03-13
Abstract: 609,420. Ventilating closets. ACOSTA, J. R. B. March 13, 1946, No. 7893. [Class 26]. In a water-flushed closet, in which an increased current of ventilating air to remove noxious gases from the basin is produced by the flush water from the flushing compartment 7 being deflected downwardly by a projection 9, the flushing compartment 7 and air outlet compartment 6 above it form a conduit integral with the basin 1. An air-inlet opening 14 is afforded between the basin and the seat 12 by the gap in the rubber ring 13, and the air outlet leads to an uptake pipe 3 which may contain a ventilating fan 17.