baber/WOPTO huggingface dataset:
Patent GB-803281-A (GB)
Title: Improvements in or relating to electro-acoustic devices
Inventor: VILLCHUR EDGAR MARION
IPC: H04R1/28
Filed: 1955-07-18
Abstract: 803,281. Loud-speakers. ACOUSTIC RESEARCH, Inc. July 18, 1955, No. 20703/55. Class 40 (4). The diaphragm 1 of a loud-speaker -has a soft suspension, the elastic - restoring force being provided .by the air between the diaphragm and the back of a substantially sealed cabinet 2. By this means the size of the cabinet to provide the optimum resonant frequency can be very much reduced. The cabinet . is. stiffened by battens 71 and filled with fibrous material. To balance the pressure inside the cabinet with that of the atmosphere a very small leak may be provided. The annular rimsuspending member 5 is made of gas-impervious material bellied out or pleated for minimum stiffness. The voice-coil suspending member 6 is in the form of a corrugated disc with staggered concentric slots 14. Because of the substantially sealed cabinet the leads 10 to the loud-speaker are connected to posts 11. Specifications 299,822, 333,578, [both in Class 40 (4)] and 512,610 are referred to.
Patent GB-629709-A (GB)
Title: Mixing valve applicable to hot and cold water
IPC: G05D23/13
Filed: 1947-07-31
Abstract: 629,709. Mixing valves. SYMMONS, P. C. July 31, 1947, No. 20751. Convention date, June 13, 1941. [Class 135] A mixing valve for hot and cold water &c., comprises a hollow main valve member 14 having inlet and outlet ports 31, 32 respectively for the hot water, and inlet and outlet ports 29, 30 for the cold water, a pressure equalizing piston valve 33 with recesses 34, 35 adjustable to communicate with the ports, and means for subjecting the ends of the piston valve to the water pressures, thus causing the said valve to move and regulate the flow to maintain a substantially uniform temperature in a mixing chamber 12. The member 14 is opened by a handle 28 permitting hot and cold water from inlets 5, 4 respectively, to enter through the ports 31, 29 into the recesses 35, 34 respectively and thence flow through the ports 32, 30 into the chamber 12 which communicates with a main outlet. Passages 37, 38 conduct the cold and hot water to the ends of the valve 33, which may be rotated by a cap 45 to vary the opening of the ports 29 to 32, thus controlling the volume of flow. If one supply fails, the pressure of the other moves the valve 33 to close either set of inlet ports 29, 31, i.e. ports 31, as shown, on failure of the cold supply. The area of the ports 30, 32 open to the chamber 12, and the temperature of the mixture in that chamber may be varied by turning the handle 28. In a modification, the volume of flow is not controlled. and the recesses 34, 35 are replaced by annular chambers.
Patent GB-637997-A (GB)
Title: Improvements in or relating to flexible joints for pipes or conduits
IPC: F16L27/067
Filed: 1946-07-11
Abstract: 637,997. Swivelling pipe joints. BARD, F. N. July 11, 1946, No. 20756. Convention date, July 14, 1945. [Class 99(i)] A gasket 17, Fig. 1, open directly on one side to the pressure of fluid passing through the joint, engages a ball-member 16 mounted in a casing 10, and a rubber &c. ring 29 is pressed into a corner formed by adjacent surfaces on the casing and gasket. The member 16 is pressed against the gasket by a ball 20 mounted between a spring-pressed support 25 and a disc 21 retained in the member 16 by a snap ring 23. The gasket 17 is held in place by a nut 19 and a washer 18, a ball 31 preventing the gasket from turning: 32 is a dust seal. In a modification, Fig. 3 (not shown), the ball member consists of the central segment of a sphere, and the gasket rests on an O-ring of soft metal &c., in a corner between the lower end of the casing, a nut, and a bevelled surface on the gasket. In Fig. 4, the nut 19 is dispensed with, and a gasket 39 rests on a four-piece ring 40 mounted in a groove in the casing, and a ring 45 is provided of the same cross-section as the corner. In further modifications, the upper side of the gasket slopes upwardly and the ring has a narrow V- shaped slit, Fig. 6 (not shown), and the slope is downward and a wide slit is provided, Fig. 7 (not shown).
Patent GB-687174-A (GB)
Title: Improvements in or relating to pulse modulated wireless multi-channel transmission systems
IPC: H04B1/60
Filed: 1950-08-23
Abstract: 687,174. Radio signalling. PATELHOLD PATENTVERWERTUNGS- & ELEKTROHOLDING AKT.-GES. Aug. 23, 1950 [Sept. 17, 1949], No. 20843/50. Class 40 (v). In a multi-channel pulse modulation radio system, with relay stations, the non-reception of a pulse train at a relay station automatically introduces a local pulse generator. The normal detected input pulse train from conductor e1, Fig. 2, is fed to a three-stage amplifier and thence to the transmitter over conductor e3. It is also fed to a circuit K which de-energizes relay Re, when the pulses fail, to close contacts r2 to energize the local pulse generator JG feeding the output valve, and to operate contacts r1 to block the input valve by applying a negative voltage to its screen grid. The circuit K is made responsive to the long synchronizing pulses of the normal pulse train by feeding the pulses to condenser C, Fig. 2a, to produce sawtooth pulses of amplitude proportional to the pulse duration. The synchronizing pulses are of sufficient amplitude to overcome the bias on a second amplifier, which is provided by grid current, and the negative pulses at the anode give rise to positive pulses by the action of the grid condenser and rectifier G of the output valve which operates the relay Re. The substituted pulses are made to have the same duration as the normal synchronizing pulses and may be duration modulated to indicate a disturbance, or by speech, or further modulated pulses may also be generated.
Patent GB-1479377-A (GB)
Title: Electro-photographic printers
IPC: G03G15/08
Filed: 1975-05-16
Abstract: 1479377 Developing electrostatic images PENTACON DRESDEN KAMERA-UND KINOWERKE VEB 16 May 1975 [31 May 1974] 20878/75 Heading G2H Toner 8 is added to the developer mixture in chamber 1 by being forced through gap 11 by roller 9, the gap being shaped to lead into the chamber in the direction 6 in which the developer moves under the influence of paddle wheels 3, 4. Preferably the roller 9 has a soft, elastic coating, is a brush roller, with bristles which deflect against the lower wall of container 9 and straighten as they pass the gap 11, or has soft and elastic blades.
Patent GB-388999-A (GB)
Title: Improvements in or relating to float-operated electrical meters
IPC: G01F23/44
Filed: 1932-07-25
Abstract: 388,999. Electric signalling systems. ELECTROFLO METERS CO., Ltd. and DUNGLINSON, B., Abbey Road, Park Royal, London. July 25, 1932, No. 20891. [Class 40 (i).] Apparatus for indicating, integrating or recording the height or flow of liquids comprises a float a adapted to operate a resistance element b through the intermediary of a rotatable shaft i carrying a counter - weighted pulley k attached to the float by a cord or tape j. The cord may be made of a material having a negligible coefficient of expansion, e.g. that known under the registered Trade Mark " Invar." The resistance element b is raised or lowered in conducting liquid e, e.g. mercury, to vary the resistance of the indicating circuit in accordance with the movements of the liquid and the form of the element, e.g. the contour and cross section, may be varied to suit the characteristics of the law underlying the, movements to be indicated. The indicating circuit may be supplied with alternating or direct current. The shaft i may carry a pointer n co-operating with a dial o.
Patent GB-864131-A (GB)
Title: Benzimidazolyl-acetic acid derivatives
Filed: 1958-06-30
Abstract: The invention comprises 1-aminoalkyl-benzimidazolyl-(2)-acetamides of the formula:  <FORM:0864131/IV (b)/1> and acid addition salts thereof, wherein A is a lower alkylene group, R represents a di-lower alkylamino group, R1 is a phenyl group optionally bearing halogen, lower alkyl or lower alkoxy substituents in the 3-and 4-positions and R2 is hydrogen or a nitro group (the word "lower" denoting groups of 1-5 carbon atoms).  The compounds are prepared known methods such as (a) introducing the dialkylaminoalkyl group into the 1-position of the benzimidazole by reacting an a -benzimidazolyl-(2)-a -phenyl-acetamide with a reactive ester such as a halide or organic sulphonate, of an alcohol R1-A-OH wherein R1 is a dialkylamino group of a group which is subsequently converted thereto, such as a hydroxyl group which is converted by chlorination followed by reaction with a secondary amine; (b) subjection an aniline derivative bearing an ortho substituent Y-NH-, where Y is a dialkylaminoalkyl group or a group which is subsequently converted thereto such as a b -chlorethyl group, to ring closure with an a -carbamoyl-phenylacetic acid or a reactive functional derivative thereof; or (c) converting a substituent in the a -position of the benzyl radical of a 1-dialkylaminoalkyl-2-benzyl benzimidazole, for example a carboxyl, acid halide, acid ester or nitrile group into a carbamoyl group. Preferred products include a -[1-(b -diethylamino-ethyl)-benzimidazolyl-(2)]- a -phenyl- and a -p-chlorophenyl-acetamides and the corresponding 5-nitro-compounds. The products are used pharmaceutically (see Group VI) suitably in the form of acid addition salts such as the hydrohalide, sulphate, nitrate, phosphate, thiocyanate, acetate, propionate, oxalate, malonate, succinate, malate, methanesulphonate, ethanesulphonate, hydroxyethansulphonate, benzenesulphonate and toluenesulphonate.ALSO:Analgesic pharmaceutical preparations comprise 1 - aminoalkyl - benzimidazolyl - (2) - acetamides of the formula <FORM:0864131/VI/1> and acid addition salts thereof with inorganic or organic acids, e.g. hydrohalic, sulphuric, nitric, phosphoric, thiocyanic, acetic, propionic, oxalic, malinic, succinic, malic, methane-sulphonic, benzene sulphonic, hydroxyethane-sulphuric acids or with acids having therapeutic action (see Group IV (b)), wherein A is a lower alkylene group, R represents a di-loweralkyl-amino group, R1 is a phenyl group optionally bearing halogen, lower alkyl or lower alkoxy substituents in the 3- and 4-positions and R2 is hydrogen or a nitro group (the word "lower" denoting groups of 1-5 carbon atoms), in conjunction with a pharmaceutical organic or inorganic, solid or liquid excipient suitable for enteral or parenteral or topical application.  The preparations may take the form of tablets, dragees, ointments, creams, solutions, suspensions or emulsions.
Patent GB-715581-A (GB)
Title: Preparation of dl-tryptophan and its n-acyl derivatives
IPC: C07D209/20
Filed: 1952-08-21
Abstract: A method for making dl-tryptophan and N-acyl-tryptophan comprises saponifying and decarboxylating a dialkyl ester of an acylamido-(3-indolyl-methyl) malonic acid solely by means of heat and alkali, the saponification and decarboxylation step consisting in mixing and heating the said ester with from 1.3 to 2.5 equivalent weights of an alkali for each mol. of the ester, in an aqueous medium, under pressure, at a temperature between 150 DEG  and 300 DEG C.  The nature of the product (i.e. tryptophan or its N-acyl derivative) depends on the reaction conditions; e.g. at 175 DEG  C. the N-acyl derivative is first obtained and may be isolated or converted by heating with additional alkali (2 or more equivalents) at say 100-175 DEG  C. to tryptophan.  At 250 DEG  to 300 DEG  C. and using 2.0 to 2.5 or more equivalents of alkali, the initial acylamido ester is converted to tryptophan directly.  In an example, one molecular proportion of diethyl acetamido-(3-indolylmethyl) malonate is heated with 2.2 equivalents of sodium hydroxide at 175 DEG  C. under pressure.  After cooling, 2.8 equivalents of alkali are added to the N-acetyl dl-tryptophan obtained and heating at 175 DEG  C. resumed, yielding dl-tryptophan.  A table illustrates the effect on the yield of tryptophan of varying the initial amount of alkali between 3.0 and 1.3 mols. of alkali per mol. of ester, at 170-175 DEG C., 2 mols. of alkali being used in each case in the second stage. In a second table the product of a series of single stage processes is analysed for tryptophan and N-acetyl-tryptophan content, reaction temperatures between 170 DEG  and 300 DEG  C. and reaction times between 1.5 hours and 1 minute being employed.  Other suitable alkalis are potassium, lithium, calcium and barium hydroxides. Specification 599,046 is referred to.
Patent GB-989458-A (GB)
Title: Improved electric motor control system
IPC: G11B15/54
Filed: 1963-05-27
Abstract: 989, 458. Automatic speed controls. AMPEX CORPORATION. May 27, 1963 [June 1, 1962], No. 2<SP>1117</SP>/63. Heading G3R. [Also in Division H2] In a magnetic tape transport system the capstan is driven by an A.C. motor 10 having driving windings 14, 15, and braking winding 16. The motor is coupled to a tachometer wheel 12 associated with an inductive pick-up winding 20. The signal from the winding 20 is amplified in a pre-amplifier 22 comprising transistors 122, 123, the latter being coupled to transistor 124 which, with transistor 125 comprises trigger stage 24. This is followed by a number of binary frequency dividing stages 26-30 each comprising transistors 126,127, in a bi-stable triggering arrangement, so that two complete pulse cycles at the input stage 26,for example, produces one complete cycle at the output thereof. The signal selected by switch 32 is applied to a time base comparator 34 comprising transistors 134,135, with a fixed delay reference stage including unijunction transistor 136. The bi-stable circuit 134,135, is switched 32, and to the other stable state by a signal from the transistor 136. The voltage at the collector of transistor 134 has a rectangular waveform carrying a D. C. component whose polarity and magnitude corresponds to the direction and degree of correction required to make the motor speed correspond with the selected speed. The output signal from the stage 34 is filtered by network 36, the D.C. and residual low frequency components being applied to servo amplifier 38 comprising transistor 139 for comparison with a fixed reference potential developed by transistor 138. The resulting error signal is applied to amplifier 40 so presenting a variable impedance in parallel with the brake winding 16 which is supplied from rectifier and filter 42. Concurrently, the reflected impedance in transformer winding 19 produces a corresponding change in the energization of motor windings 14, 15, whereby the motor changes speed to match the setting of the speed selector 32. In another arrangement, the windings 14, 15, are supplied through diode 150 in parallel with silicon controlled rectifier 151 whereby the relative magnitude of D. C. and A. C., components of the power applied to these windings is varied in accordance with a control signal from the amplifier 40. As the error signal from stage 34 approaches zero, a second error signal developed by phase comparator stage 35 becomes effective to provide frine control. The signals from selector 32 are applied through successive binary divider stages 152 to phase comparator 153. A sinusoidal voltage from frequency standard source 37 is converted to a train of pulses by trigger 155 for application to the phase comparator. The error signal is filtered in network 156 and the D.C. component is fed to the base of transistor 139.
Patent GB-669932-A (GB)
Title: Improvements in float-operated electric switches
IPC: G01F23/64
Filed: 1949-08-15
Abstract: 669,932. Magnetic switches; mercury switches BAYHAM, Ltd., and HUTCHINGS, P. J. July 31, 1950. [Aug. 15, 1949] No. 21172/49. Class 38 (v). A permanent magnet h is arranged within a float g so that when the float descends by sliding on the tube f, an armature a floating on mercury, b is pulled downwards, causing the mercury to bridge two. mutually insulated contacts c, d.
Patent GB-361313-A (GB)
Title: Improvements in or relating to pumps
IPC: F02M71/00
Filed: 1930-07-12
Abstract: 361,313. Fuel pumps. MOULET ET CIE, M., 51, Boulevard Emile Zola, Oullins; Rhone, France. July 12, 1930, No. 21182. Convention date, March 5. [Class 102 (i).] Regulating delivery by byepasses; priming; auxiliary actuating gear.-One of the walls or a wallportion of a rotary or other pump for petrol. &c. is made movable, in order to reduce friction and to effect a byepass between the suction and discharge sides of the pump on rise of pressure. As shown, a drum 24 on a shaft 24a, revolving in an eccentric chamber 23 is provided with vanes 25, 26 pressed apart by springs. The wall 50 of the pump chamber is connected by a ball-jointed rod 47 to a sleeve 46 packed by a bellows 43 secured to the sleeve and to a flanged plate 44, which is clamped between the pump chamber and a casing 42. The interior of the bellows communicates with the discharge side of the pump through a port in the plate 50, and the discharge pressure thus tends to lift the plate against the action of a spring 51. The latter is adjustable by a sleeve 53, turned by a disc 54; and moving a nut 52, rotation of which is prevented by a stud 55. The pump is provided with inlet and discharge valves, the movement of which'is limited by stops, and the suction passage is provided with a filter. The plate 50 can be lifted, or reciprocated for priming, or auxiliary pumping, by means of a rod 56. When the pump supplies petrol to a carburetter subjected to pressure from a compressor, the compressor pressure may be supplied to the casing 42. The stuffing-box of the spindle 24a is supplied with lubricant, at a pressure greater than that of the petrol &c. pumped, by means of a passage 40 and lantern ring 33. The packing 32 is compressed by means of a nut 34 and spring 35. Rotation of the nut 34 and ring 33 is prevented by means of studs 36, 37 engaging slots. Specification 300,502, [Class 102 (i), Pumps &c.], is referred to. The Specification as open to inspection under Sect. 91 (3) (a) describes also a reciprocating pump, Fig. 8 (Cancelled), in which a section 75 of the barrel is movable against the action of a spring 80 adjustable by means of a stud 82 and disc 81. The section 75 is packed by a bellows, to the interior of which the discharge pressure is admitted through a port 75a. The section 75 can be operated by a rod 83. This subject-matter does not appear in the Specification as accepted.
Patent GB-797034-A (GB)
Title: Improvements in or relating to culinary mixes
IPC: A21D10/00
Filed: 1956-07-09
Abstract: A mixture suitable for making baked goods, exemplified by white, yellow, and chocolate cakes, comprises crystalline sugar, uncooked flour, and shortening, the sugar being fragmented and mechanically bonded to the flour particles, and the shortening being dispersed in a thin film throughout and coating the bonded sugar and flour.  Small quantities of leavening agents, exemplified by mixtures of sodium bicarbonate with potassium acid tartrate, monocalcium phosphate, monosodium phosphate, sodium acid pyrophosphate, and sodium aluminium sulphate of 80-150 micron fineness, cocoa of fineness less than 30 microns, salt, egg solids, and milk powder, may be incorporated.  The sugar may be sucrose, glucose or fructose.  The shortening preferably contains emulsifiers, e.g. mono- and diglycerides of fatty acids, fatty acid partial esters of sucrose, and phosphoric and sulphuric acid esters of polyhydric compounds.  The mixture is prepared by subjecting a homogeneous mix comprising the sugar, flour and shortening to simultaneous shearing and crushing, as provided by passage between two rollers moving at different speeds, after which any leavening agents and/or cocoa are added.  Preferably, not more than 10 per cent of the mixture, when freed from fat by extraction by hot hexane, is of density above 1.59, and preferably not more than 32 per cent of the mixture, similarly freed from fat, is of density less than 1.50.  Examples of mixture formulations are: 38-48 per cent of sugar, 28-45 per cent of flour, 9-16 per cent of shortening, 0-5 per cent of egg solids, 0-5 per cent of milk powder, 1-4 per cent of leavening agent, and 0-7 per cent of cocoa.  U.S.A. Specification 2,339,737 is referred to.
Patent GB-635021-A (GB)
Title: Improvements in telescopic valve devices for liquid containers
IPC: F16K3/26
Filed: 1947-08-05
Abstract: 635,021. Taphole barrels &c. FUTS METALLIQUES GALLAY SOC. ANON. Aug. 5, 1947, No. 21290. Convention date, Jan. 24, 1941. [Class 21] [Also in Group XXIX] A device for tapping barrels, etc., comprises a base 1 crimped in an opening in the barrel, an outer tube 10 slidable in the base and having a closed outer end 12, an open inner end and an outlet aperture 20, and a shorter inner tube 11 slidable but not rotatable in the outer tube; the tubes being adjustable to one or other of three relative positions, viz: a first position wherein both tubes extend wholly into the barrel, a second position wherein the inner tube 11 extends wholly and the outer tube partially, out of the barrel, the outlet aperture being covered by the inner tube, and a third position, as shown, wherein both tubes extend wholly out of the barrel with the outlet aperture uncovered. A spring 22 urges the tubes from the first to the second position when a bridge 17 on the inner tube engages a stop 9 on a rod 8 carried by a U-shaped element 5 secured to the base. The device is moved from the second to the third position by pulling a handle 15, which permits a gradual opening of the outlet aperture. Lugs 16 on the mouth of the outer tube engage slots in the U-shaped element, and in the first position, these lugs lockingly engage ramps 6 on the U-shaped element by rotating the handle and tubes through 90 degrees.
Patent GB-1537454-A (GB)
Title: Vinylidene chloride copolymer film
IPC: C08L33/08
Filed: 1977-05-20
Abstract: 1537454 Vinylidene chloride copolymer blend films KUREHA KAGAKU KOGYO KK 20 May 1977 [20 May 1976] 21377/77 Heading C3M Films are prepared by blow-extruding quenched extruded tubular parisons of compositions comprising (1) a vinylidene chloride copolymer containing 60-95% vinylidene chloride, (2) an elastomer miscible therewith and (3) a dispersed particulate elastomer formed by coating or grafting a polymer miscible with the vinylidene chloride copolymer on to the surfaces of elastomeric particles, the elastomer (3) constituting 5-50% of the elastomer component and the total elastomers constituting at least 10% of the composition up to a maximum varying linearly from 24% at 5% of (3) to 60% at 50% of (3) in the elastomer component. Examples describe films blown from compositions of (1) copolymers of vinylidene chloride, vinyl chloride and optionally dodecyl acrylate; (2) copolymers of ethylene, vinyl acetate and optionally ethyl acrylate or vinyl chloride; and (3) particulate styrene/butadiene rubber, optionally crosslinked with divinyl benzene, on which methyl methacrylate is adsorbed and polymerized.