baber/WOPTO huggingface dataset:
Patent GB-438050-A (GB)
Title: Manufacture of polyvinyl esters
IPC: C08F18/04
Filed: 1934-05-11
Abstract: Polyvinyl esters are manufactured by polymerizing the monomeric ester in dispersion in an aqueous solution of a neutral electrolyte, if desired with the addition of a substance promoting the polymerization, e.g. an accelerator, an emulsifying agent or a regulator.  Suitable neutral electrolytes are the salts of strong inorganic bases with strong acids, e.g. sodium chloride, ammonium chloride, potassium sulphate or calcium chloride, the neutral salts of the alkali metals being preferred.  The concentration of the metal salt solution should desirably be at least 10 per cent.  Suitable emulsifying agents are turkey red oil, the sodium salts of alkylnaphthalenesulphonic acids, and the sodium salts of products of reaction of higher fatty acids with hydroxy-or aminoalkylsulphonic acids.  As regulators, the proportion of which is preferably 0,2--1 per cent of the vinyl ester, there may be used organic solvents such as epichlorhydrin, dioxane, glycol or phenoxypropane oxide.  In examples: (1) a mixture of vinyl chloracetate, benzoyl peroxide and dioxane is introduced gradually at 90 DEG  C. with stirring into a sodium chloride solution containing an emulsifying agent, e.g. the sodium salt of a sulphonated fatty alcohol; the product may be used as a crude material for lacquers, as a spraying material or a moulding material; (2) the reaction of (1) is carried out in the presence of epichlorhydrin in place of dioxane, and of sodium benzylnaphthalenesulphonate and sodium hydroxydodecanesulphonate as emulsifying agents; (3) a mixture of vinyl chloracetate and benzoyl peroxide is introduced gradually at 90 DEG  C. with stirring into a calcium chloride solution containing an emulsifying agent; the product is suitable for the preparation of lacquers, particularly for electrical insulating purposes; (4) a mixture of vinyl chloride, vinyl acetate and acetyl peroxide is heated in an autoclave with a sodium chloride solution; (5) a mixture of vinyl chloracetate, vinyl acetate and benzoyl peroxide is introduced gradually at 80 DEG  C. into a sodium chloride solution containing an emulsifying agent in a reflux apparatus; the product may be used as a crude material for lacquers, as a moulding material and as an adhesive; (6) a mixture of vinyl acetate and benzoyl peroxide is introduced gradually at 80 DEG C. into a sodium sulphate solution containing the sodium salt of a sulphonated fatty alcohol; (7) a mixture of vinyl acetate, vinyl dichloracetate (obtainable from acetylene and dichloracetic acid) and benzoyl peroxide is introduced gradually at 80 DEG  C. into a sodium chloride solution containing an emulsifying agent.
Patent GB-663587-A (GB)
Title: Improvements in or relating to signalling over electric pulse communication systems
Inventor: TREADWELL CYRIL GORDON
IPC: H04J3/16
Filed: 1949-05-30
Abstract: 663,587. Telephone exchange systems. STANDARD TELEPHONES & CABLES, Ltd. May 30, 1949, No. 14434/49. Class 40 (iv). [Also in Group XL (c)] In a time-modulated pulse system in which the idle or seized condition of a channel is indicated by the reference position of the pulse being either “  or ¢ a channel period from the beginning of said period, and in which it may be necessary to pass supervisory signals or operator's speech over the channel, receiving arrangements are provided whereby the consequent changes of time position of the pulse during the idle condition do not cause seizure of the channel. In the receiver, Fig. 1, valve 20 is normally conducting to hold relay 22 to signal the idle condition of the channel. The time-modulated pulses received over 1 are converted at 2 into width-modulated negative pulses, commencing at the beginning of the channel period to charge condenser 11 in a time constant circuit 11, 12. If the pulses occupy only “ of a channel period the condenser 11 is insufficiently charged to overcome the bias on rectifier 13. If, however, the pulses are ¢-period long then the bias on the rectifier is overcome and condenser 18 in the integrating circuit 18, 19 charges negatively to cut off valve 20 and release relay 22 to mark the channel seized. A pulse used for gating the previous channel is applied over lead 25 after amplification at 26 to a network 32 which delays it so that it occupies the first quarter of the succeeding period, whereupon it is applied so as almost to neutralize the standing bias on rectifier 35. If signalling takes place over the channel in the idle condition the incoming (negative) pulse will swing into the first quarter period and when applied via condenser 40 to the other side of the rectifier 35 will cause it to conduct and charge the condenser 40. At the end of the channel pulse this charge is applied to the integrator circuit 18, 19 to provide a negative bias to hold valve 20 cut off. Clearly in the idle condition, the excursions of the pulse into the first quarter period are so frequent as to outweigh the effect on the circuit 18, 19 of the occasional excursion into the second half of the period. Likewise in the seized condition the excursions of the pulse into the second half of the period outweigh the effect of the occasional excursion into the first quarter of the period. In systems in which two sets of channel gating pulses are used, one for odd and one for even channels, the pulses for the odd channels may be applied to the circuits 44 of the even channels and vice versa and one guard circuit may function for all odd channels and another for,all even channels. Alternatively, the channel gating pulses of the same group of channels may be used, the network 32 then having a delay of 1“ periods.
Patent GB-108771-A (GB)
Title: Improvements in or relating to Pumps.
Inventor: DODSON EDWARD
IPC: F04B43/08
Filed: 1916-10-11
Abstract: 108,771. Dodson, E. Oct. 11, 1916. Lever-actuated pumps; stroke, varying; air. trapping and removing; air vessels; flexible-chamber pumps.-In a pump of the kind comprising a tubular chamber, such as a Bourdon tube, supplied with liquid through a non-return valve and subjected to a bending or distorting action which varies the volume of the tube, the tubular chamber A is fed through the inlet valve C with liquid under pressure. The chamber A may be in the form of a Bourdon tube, the closed end of which is reciprocated by a cam or eccentric and lever provided with means for 'varying the stroke: or the tube may be coiled round to a central point and torque applied at the end; or a straight or slightly curved tube may be used and the pumping action produced by bending at the middle or at one end or by twisting. The stroke may be varied by providing the actuating lever, which is oscillated by a cam F, with a rod h having a slot h<4> engaged by a pin j on an adjustable arm J. The pin i may also be adjustable in a slot in the arm J. In another form, the fulcrum of the lever is adjustable automatically or by hand. An airtrap may be provided near the delivery valve D and consists of a chamber E separated from the tube A by a lightly loaded valve c, and containing two perforated plugs e<1>, e<2>. A tubular accumulator A<1> may be mounted on the delivery pipe 0 to maintain the delivery pressure. The tube A is prevented from vibrating by a damping device which may consist of a strip K of wood bound on the tube. A relief valve may be provided on the pump body B. Two or more pumps may be arranged in series to give a very high delivery pressure.
Patent GB-119546-A (GB)
Title: Improvements relating to Alternating Current Generators.
Inventor: WALL THOMAS FREDERICK
IPC: H02K39/00
Filed: 1917-10-09
Abstract: 119,546. Wall, T. F. Oct. 9, 1917. Reciprocating and rotary machines.-In the electric operation of rock drills, chipping hammers, riveters, and other reciprocating appliances, a contact-maker is dispensed with, and the appliance is supplied from generating apparatus adapted to produce asymmetrical pressure waves c<3>, Fig. 3, with relatively long intervals of little or no pressure between the waves. The pressure waves e<3>, Fig. 3, may be produced by connecting in series the armatures b, f of a main generator with four field-magnet poles a and an auxiliary two-pole (or four-pole) generator d, the main and auxiliary generators giving rise to pressure curves e<1>, e<2>, Fig. 2, respectively. The separate machines may be combined in a single machine, the poles being carried on two separate yokes, and the windings c, g on the same armature. The invention is applicable to the operation of rotary tools. The pressure curves according to the invention may be obtained by the use of a continuous-current machine, or a battery, as the auxiliary machine, a continuous-current pressure being superposed on the main wave. Specification 5883/15 is referred to.
Patent GB-507118-A (GB)
Title: An improved envelope
IPC: B65D27/32
Filed: 1938-05-17
Abstract: 507,118. Envelopes. DOBSON, A. May 17, 1938, No. 14615. [Class 146 (ii)] To facilitate opening, the closure flap of an envelope is provided with an ungummed portion a terminating in a perpendicular or slanting line of perforations c which is continued along the fold of the flap. The remairider of the flap is provided with gum or rubber adherent.
Patent GB-608744-A (GB)
Title: Improvements in or relating to magnetrons
IPC: H01J25/54
Filed: 1946-05-15
Abstract: 608,744. Magnetrons. PHILIPS LAMPS, Ltd. May 15, 1946, No. 14700. Convention date, Feb. 27, 1942. [Class 39 (i)] A magnetron has, in addition to one or more internal anodes 4, 'Fig. 1, not entirely surrounding the cathode 2, two or more external electrodes 6, 7 arranged in the spaces left by the anodes and connected to an output impedance 9. The impedance may be a cavity resonator 11, Fig. 3, incorporating the electrodes 6, 7. In a multi-anode arrangement, external electrodes 6<1>, 6, 7<1>, 7, Figs. 4a, 4b are connected alternately to the bottom and top of a cylindrical resonator 12 and cover the spaces left by anodes 4<1>, 4, 5<1>, 5. A circuit may also be connected to the internal electrodes tuned to a sub-multiple of the external frequency.
Patent GB-147766-A (GB)
Abstract: 147,766. Trinks, F. May 15, 1014, [Convention date]. Addition to 19815/13. Multiplying and dividing apparatus; zeroizing-mechanism.- Relates to zeroizing-mechanism for the revolutions - counting mechanism of calculating-machines as described in the parent Specification. According to the invention, a second zeroizing- mechanism is provided which is mounted on a shaft 54 and is adapted to be operative when the usual zeroizing shaft 7 is rotated in its ineffective direction (arrow y); this zeroizing - mechanism serves, after a multiplying or adding operation has been performed, to reset the, numeral wheels 1 in such a manner as to expose to view the ciphers of the relativelydisplaced series of numerals b for division or subtraction, and causes the transfer pins 42 to pass from one side of the head of the transfer levers to the other side. A rotation in the direction of the arrow x again exposes to view the cipher of the series of numerals a for multiplication and addition. The shafts 7, 54 are connected by gearing 55, 56 having a ratio of two to one, and pawls 58, 59 engage notches in cam-bushes 13, 57 loosely mounted on the said shafts and so arranged that the shaft 7 or 54 can be axially displaced to effect the zeroizing in the active direction of rotation, i.e. arrow x or arrow y respectively. The gear-wheels 2 of the numeral wheels 1 engage driving-pinions 60 mounted on the shaft 54 and adapted to be coupled thereto in the known manner by pins 60<1>, 61, which, however, are normally displaced one-tenth of a revolution. On account of this displacement, when the handle 10 is rotated in the direction of the arrow y the shaft 54, which makes two revolutions, rotates the numeral wheels 1 nineteen-twentieths of a revolution and thus exposes to view the cipher b and consequently places the transfer tooth 42 of each numeral wheel below the head of the corresponding transfer lever in correct operative position for rotation of the numeral wheels in the reverse direction. This operation leaves the pins 60', 61 opposite each other, so that any further rotation merely resets the numeral wheels to the new zero position. To prevent the axial return movement of the shaft 54 before the end of the second revolution, a projection 63 on the pawl 58 is moved behind a projection 64 connected to the shaft when the pawl is raised from engagement with its notch 13<11>. In a modification, the pairs of wheels 55, 56 and 2, 60 are replaced by wheels of equal size, the zeroizing pins 60<1>, 61 are relatively-displaced one-twentieth of a revolution, and the projections 63, 64 being unnecessary are omitted.
Patent GB-804431-A (GB)
Title: Improvements in or relating to sealing means for the doors of ovens and the like
Inventor: LUSK ARCHIBALD
IPC: F24C15/02
Filed: 1954-05-20
Abstract: 804,431. Seals for oven doors. PARKINSON & COWAN, Ltd. May 20, 1955 [May 20, 1954], No. 14795/54. Class 126 A seal for an oven door comprising a resilient member having a bearing part and an outer flange at right angles, is secured to the door or the door frame by a part remote from the outer flange so that the edge of the frame or the door engages the bearing part near the outer flange, the bearing part and edge of the frame or of the door being slightly inclined to each other and lying in the direction of movement of the closing door. One flange 21 of a resilient channel sealing member is clamped between a channel member 12 forming the frame of the door opening and on out-turned flange of the oven lining 14. The web 23 of the seal is at a small angle to the edge face 26 of the door which slides over the web as the door closes. The free flange 22 of the seal passes between the outer panel 13 of the oven and one of the outwardly directed limbs 16 of the channel frame 12, and bears against the panel 13 to close the front surface of the cooker. At the corners of the door opening, the rounded corners of the door bed on tubes 28 of glass fibres which are secured in slots in the top and bottom channel seals. The web of the top channel seal may abut the web of the side seal which extends beyond the door opening, or it may enter a cut away part of the side channel seal. The door frame channel members may have their flanges directed forwardly, Fig. 6 (not shown). The channel seals may be mounted on the door itself, in which case the flanges are directed towards the middle of the door.
Patent GB-440781-A (GB)
Title: Improvements relating to sliding clasp fasteners
IPC: A44B19/36
Filed: 1935-05-21
Abstract: 440,781. Sliding - clasp fastenings. KRANTZ, H., 31, Edith Grove, Chelsea, London. May 21, 1935, No. 14855. [Class 44] Separately made cover pieces of leather, rubber, cloth or metal are fitted at the ends of a sliding- clasp fastener to receive and grip the slider, the pull piece of which enters a slot 2 in the cover piece. A finger piece 3 on the cover facilitates manipulation. Simple cover members may be provided at the underside ends of the fastener. The fastener may be provided with lengthwise covering flaps 10 ; such flaps may be formed by doubling back the usual stringer tapes.
Patent GB-481172-A (GB)
Title: Improvements in and relating to silencers for internal combustion engines
IPC: F01N1/08
Filed: 1936-05-26
Abstract: 481,172. Exhaust-silencers. BECKER, E. W. May 26, 1936, Nos. 14902 and 14903. Void. Convention dates, Nov. 18, 1935 and April 16, 1936. [Class 7 (ii)] Exhaust entering at 2 is subdivided into several streams by a series of rings 3 of decreasing diameter, presenting their edges to the flow of gases and curved outwardly so as to deflect the gases through approximately 90‹ past guide blades 4, which cause the gases to circulate about the axis of the rings. The gases then pass through slots 6 formed by stamped-out tongues 7 in a cylinder 5, which is surrounded by a helically-corrugated casing 1. The slots 6 may be arranged in straight rows or helically. The gases finally pass through helical passages formed by guide blades 12, which preferably reverse the rotation. The blades 12 are connected at their ends to rings 11, the outer one of which is slidably arranged in the exit 13, so that the blades can expand with heat and provide wider spaces for the flow of the gases as the load on the engine increases. The width of the blades 12 decreases, as shown, towards their middle parts.
Patent GB-150830-A (GB)
Title: Improvements in or connected with tail skids for aeroplanes and the like
IPC: B64C25/50
Filed: 1919-06-13
Abstract: 150,830. Palethorpe, J., and Smith, W. S. June 13, 1919. Hydraulic springs; dash-pots.-A combined hydraulic and helical spring is provided on the tail skid of an aeroplane. The hydraulic spring takes shocks on landing, and the helical spring when taxying. The skid 3, Fig. 2, is fulcrumed at 5, and has a cable 9 for pulling it up. The hydraulic member consists of a cylinder 12 pivoted to the skid at 11, and a piston 13 pivoted at 10 to the tail post 4. The piston has a cup washer 14, non-return valve 15 and seating 16 with provision for leakage. A by-pass 20 extends from the end 21 to 22 beyond the piston in its lowest position. When landing with the skid down the hydraulic member acts as a spring. After landing and with the skid up for taxying on the heel 7, the by-pass is beyond the piston, the hydraulic member becoming inoperative and a helical spring 17 alone takes the thrust.
Patent GB-185207-A (GB)
Title: Improvements relating to ovens, hot plates, bain maries and the like
IPC: F24C13/00
Filed: 1921-05-30
Abstract: 185,207. Cleary, E. May 30, 1921. Cooking-stoves.-A cooking-stove comprises an inner oven chamber A mounted in an outer casing B having an inlet aperture D in the base to admit gases from a burner which pass between the casings to outlets at the upper part of the stove. A water-tank E forming a bain marie is arranged in the top space between the casings, there being openings in the top-plate to receive cooking-vessels L. A circulation-pipe N extends from the tank E into the bottom space 'between the casings, and preferably forms a loop round the opening D; one of the vertical limbs of this pipe may be of greater diameter than the other, to promote circulation. The top and bottom walls of the outer casing are formed with flanges V fitting over the side walls. The oven walls, door, and shelves are preferably of aluminium, the bottom being protected by a disc Z of cast iron or other heat-resistant material. Valvecontrolled ventilation openings are provided in the door and roof. The oven door is provided with a glass, mica, or like window. A number of ovens may be arranged in one casing.
Patent GB-1185532-A (GB)
Title: Improved Tubular heat Exchanger
Inventor: SHANKLAND ROBERT LESLIE
IPC: F28F1/00
Filed: 1967-04-01
Abstract: 1,185,532. Swaging; making heat exchanger tubes. ROYLES Ltd. 1 April, 1968 [1 April, 1967], No. 15004/67. Headings B3A and B3H. [Also in Divisions F2 and F4] A tube 10 (e.g. in a heat exchanger) has one at least of its ends 11 reduced in diameter by means which produce a thickening of the tube wall at said reduced end. The reduction in diameter may be produced by a rotary swaging operation using a split die which rotates within a cage of annular rolls located within a fixed head. The rolls are arranged to impart blows to the die, and the tube is constrained against any substantial increase in length so that as the tube is fed into the die, the rotary motion thereof together with the blows imparted reduces the tube diameter and simultaneously creates an increase in wall thickness at the tube end. The operation it is said produces a first frusto-conical portion 12 which has an angled form, and a second frusto-conical portion 13 which is of only slightly tapering form. In use the thickened tube wall portion is externally threaded so that it may be screwed into suitably threaded aperture in an end plate. When used in a heat exchanger the tube portion between the ends may be indented to increase the heat transfer surface.
Patent GB-1515103-A (GB)
Title: Process and apparatus for intermixing liquids
IPC: B01F5/10
Filed: 1977-04-12
Abstract: In a circulation apparatus, composed of a centrifugal pump (1), a valve (9), a heat exchanger (4) and a flowmeter (10), the finished product is circulated. The finished product is initially dosed with a first liquid reaction component, which does not result in phase separation. A second liquid reaction component which, added in local excess, causes separation of a second phase, is dosed in through an insert tube with a nozzle, the nozzle being run to near the intake side of the pump rotor (2) of the centrifugal pump (1). In this arrangement, the finished product flows around the nozzle with an average velocity of at least 2.5 m/s; the reaction component dosed in through the nozzle has an outflow velocity of from 1.5 to 3.5 m/s. This makes it possible to mix liquids intimately in so short a time that local concentration differences cannot arise. The invention can be used successfully for preparing monoalkali metal phosphate solutions from phosphoric acid and alkali solution from alkali metal hydroxides or carbonates. <IMAGE>
Patent GB-1129941-A (GB)
Title: Natural draught liquid fuel pot type burners
IPC: F23D5/00
Filed: 1967-04-03
Abstract: 1,129,941. Pot burners. LES FONDERIES DE L'EAU NOIRE S.A. 3 April, 1967 [2 April, 1966; 3 March, 1967], No. 15085/67. Heading F4T. A natural draught pot-burner has primary air supply orifices 2 supplied with air from an annular space 3 bounded by a wall 4 co-operating with an outer casing 5 to form a chimney for the supply of secondary air through orifices 7, and secured to a ring 14 which divides the pot 1 are radially disposed strips 15 extending between the ring 14 and an inner ring 16 to form passages therebetween for rising gases.
Patent GB-457390-A (GB)
Title: Improvements in and relating to tops or spinning winged toys
IPC: A63H1/08
Filed: 1935-05-23
Abstract: 457,390. Tops. BELSTRUP, F. V., 86, Nansensgade, Copenhagen. May 23, 1935, No. 15107. Convention date, May 23, 1934. [Class 132 (iii)] A jumping top actuated by impacts on the top comprises a spindle 2, Fig. 1, with impact button 1 and pin 3 engaging threads 4 rigid with the body R and mass M, and a spring, rubber or other resilient device 7. The spindle 2 is returned to its initial position by the member f supported by the compression spring 6 Fig. 2 shows a revers ible spinning winged toy provided with ar impact device 1, 2 at each end.
Patent GB-1187274-A (GB)
Title: Cardiac Massage Apparatus
Inventor: LEE NORMAN JOHN
IPC: A61H31/00
Filed: 1967-04-03
Abstract: 1,187,274. Cardiac massage apparatus. MATBURN (HOLDINGS) Ltd. 3 April, 1968 [3 April, 1967], No. 15127/67. Heading A5R. An external cardiac massage apparatus comprises a base 1 on which the back of a supine patient can be placed; two upright members 3 mounted on the base via guide bushes 2 so that the patient will be between them; a crosspiece 6 supported horizontally above the base by the two upright members, the cross-piece being adjustable so that its height above the base can be varied, a plunger supported by the cross-piece and including a shaft or bar 9 which is provided with a vertical row of holes 12 and is slidable perpendicularly with respect to the cross-piece; a stop 11 which can be positioned in any of the holes so as to be engageable with the housing 10 to limit downward movement of the plunger; a pad 13, preferably of resilient material such as sponge rubber or plastic, carried by the lower end of the plunger and engageable with the chest of a patient; and a handle 16 which may be telescopic connected with the plunger so that the plunger can be moved up and down by movement of the handle. The upright members may each be provided with a vertical row of holes 5 and the cross-piece has two end portions 7 which are a sliding fit on the upright members, each end portion having a releasable spring-loaded pin 8 engageable in any one of the holes in the adjacent upright member to locate the crosspiece at a desired height with respect to the base.