baber/WOPTO huggingface dataset:
Patent GB-859339-A (GB)
Title: Improvements in or relating to the spin dyeing of cellulose acetate
IPC: D01F1/06
Filed: 1958-06-26
Abstract: In the spin-dyeing of cellulose acetate there is used an anthraquinone dyestuff which is insoluble in the spinning solution and has the general formula:  <FORM:0859339/IV(a)/1> wherein X, X1, Y and Y1 represent hydrogen or identical or different substituents selected from fluorine, chlorine or bromine and Z represents the divalent radical of benzene-1.4-dicarboxylic acid or of 1.11-azo- or 1.1 1-azoxy-benzene-4,41-dicarboxylic acid or the divalent radical of an ethylene -1. 2-dicarboxylic acid which may be substituted by chlorine or methyl.  The dyed spinning solution may be prepared by dispersing in a portion of the cellulose acetate spinning solution a relatively large proportion of the dyestuff, grinding the suspension to reduce the dyestuff particles to the required size, and mixing a minor proportion of the relatively concentrated suspension with a major proportion of the undyed spinning solution.  Alternatively the dyed spinning solution may be prepared by grinding or kneading a mixture of the dyestuff and cellulose acetate in the presence of an organic solvent which dissolves the celluose acetate but not the dyestuff, and which is either miscible with water in all proportions or contains a component miscible with water in all proportions, precipitating the cellulose acetate by addition of water, isolating the dyestuff and cellulose acetate from the mixture and adding the isolated solids mixture to a spinning solution solvent for the celulose acetate.  The dyed spinning solution may be subjected to a final grinding before spinning.  Both secondary cellulose acetate and cellulose triacetate may be treated.
Patent GB-148812-A (GB)
Title: Improvements in cleansing lubricating pads
IPC: B61F17/06
Filed: 1920-07-10
Abstract: In order to clean and render again serviceable used lubricating-pads, the pads are, after the usual treatment to remove oil, treated with dilute acid for a prolonged time, preferably at a temperature of about 50 DEG  C.  The Specification as open to inspection under Sect. 91 (3) (a) refers to the cleaning of machine-cleaning cloths, woollen waste, &c.  This subject-matter does not appear in the Specification as accepted.
Patent GB-1261367-A (GB)
Title: Instantaneous hot water heater and hot air supply
IPC: F24H9/20
Filed: 1969-04-23
Abstract: 1,261,367. Water heaters. THERMO ELECTRON CORP. 23 April, 1969 [4 Oct., 1968], No. 20703/69. Heading F4A. A water heater comprises a heat exchanger to which water to be heated is supplied, the heat exchanger being enclosed in a tank. containing heat transfer fluid, a passage adjacent a wall of the tank, and a surface burner mounted in the passage. The water heater shown in Figs. 1 and 2 comprises a flat tank 9 containing a heat storage fluid 47, preferably water containing a rust inhibitor, which is heated by gas heaters mounted outside the tank. Water to be heated is passed through a coil 13 provided with vertical fins 17 so as to be heated by the heat storage water 47. The tank 9 is contained in an outer casing 1 lined with insulating material, e.g. glass fibre, which is covered by sheet metal fire walls 5. Fuel, e.g. natural gas, supplied through pipes 81, 83 to manifolds 85, 87, together with air entering through openings 35, 37, passes through sheets 65 of porous material, combustion taking place on the inner side of each sheet, i.e. the side facing the tank 9, whereby the tank is heated. Each sheet 65 may be a metal screen but preferably is of relatively thick ceramic material. The burning gases then pass around baffles 67 to the outside of metal plates 69, passing through perforations 71 to the inside of the plates in the form of jets impinging on the tank 9 to provide further heating of the tank. The gases are exhausted by a blower 44. The gas supply is controlled automatically by means of a valve 79 governed by a water temperature senser 95 in the tank 9. Alternatively, the control may be in accordance with the tank water pressure. Preferably, a pressure relief valve 97 is provided. Vapour may be supplied via a pipe 51 to a coil located in a duct through which air is blown to provide warm air for hair and hand drying or space heating, the resultant condensate being returned via a pipe 61. A further coil connected in series with the coil and leading to a separate outlet may be provided in the tank 9 to provide a high temperature water source for, e.g. coffee making.
Patent GB-421517-A (GB)
Title: An improved method of and apparatus for emptying containers of granular and pulverulent materials
IPC: B65G53/12
Filed: 1934-07-16
Abstract: 421,517. Sand-blast. ROLFF, F., 9, Kalkreuthstrasse, Berlin. July 16, 1934, No. 20761. [Class 60] [See also Groups II and XXII] Containers for casting-machines or sand-blastingapparatus are emptied of granular material by means of a gaseous pressure agent acting on the material between the wall of the container and the edge of a resiliently acting plate which is moved by a pressure agent to follow the movement of the material as the latter is discharged. As shown in Fig. 3, a plate 5 loosely fits the chamber 1 so that an annular space 15 for the access of gaseous pressure is provided. The plate is secured to a piston rod 6 with piston 8 movable in a cylinder 9, pressure being admitted above the piston to cause a follow-up action on the material as it is discharged. Gaseous pressure is admitted above the plate 5 and passes through the gap 15 to discharge the material through an outlet 4. When the material is discharged, the pressure from the pipes 2, 11 is cut off and pressure admitted under the piston 8 through pipe 14 whereby the plate is raised and a fresh charge inserted in the chamber. Two such chambers may be used where a continuous discharge of material is required, the pressure valves being connected by links so that one chamber is discharging whilst the other is being charged. The chamber 1 may be supplied with material from another container 21 through valves 23 operated by lever arms on a manually controlled shaft 26, and gaseous pressure from a pipe 28 may be introduced to accelerate the flow. The valves 23 may be opened subsequent to or during the upward movement of the plate 5. The piston rod 6a, Fig. 4, may be hollow and supply pressure to the material through orifices 30 in the circumference of a hollow piston 5a connected to a large piston 8, Fig. 3. The plate 5 may be connected to a screwed spindle operated by bevel gearing by an electromotor, the movement being controlled through a clutch or by a load regulator which disconnects the motor when it is overloaded. The piston 8 may be operated by liquid pressure.
Patent GB-1271717-A (GB)
Title: Improvements in or relating to assaying apparatus and methods of assaying flowing mixtures
Inventor: VEEN ROMKE VAN DER
IPC: G01N9/26
Filed: 1969-04-23
Abstract: 1,271,717. Dredging. INGENIERSBUREAU VOOR SYSTEMEN EN OCTROOIEN "SPANSTAAL" N.V. 23 April, 1969 [24 April, 1968], No. 20835/69. Heading E1F. [Also in Division G1] In a method of, or apparatus for, assaying flowing mixtures, such as a mixture of a dredging spoil and water, the mixture flows upwardly, in a first portion 11, and then downwardly, in a second portion 12, of an inverted "U" shaped pipe, pressure sensing means 19, 22, for sensing differential pressures, are connected respectively to points 13, 14 in the portion 11 and 15, 16 in the portion 12, a velocity meter 24 senses the flow rate in an outlet portion 23 of the inverted "U", signals from the pressure means 19, 22 and velocity means 24 are supplied to a calculating means 25 which gives an output signal having a value which varies directly with the product of the mean mixture density value and flow rate during operation and this produced signal is integrated over a total flow time and displayed on a counter 56.
Patent GB-216403-A (GB)
Title: Improvements in furnaces for steam generators
IPC: F23M5/02
Filed: 1923-08-16
Abstract: 216,403. Babcock & Wilcox, Ltd., and Kemnal, Sir J. Aug. 16, 1923. Crowns and roofs.-Between the arch A and roof B of a steam-boiler furnace are disposed a number of open-ended retort-like flues C of refractory material keyed together and constituting a series of passages for the combustion gases. The ends of the flues may be protected by brickwork E.
Patent GB-1110021-A (GB)
Title: Microwave irradiation technique
Inventor: GERLING JOHN EDWARD
IPC: C08J3/28
Filed: 1965-05-17
Abstract: 1,110,021. Microwave heating. LITTON INDUSTRIES Inc. 17 May, 1965 [15 May, 1964], No. 20860/65. Heading H5H. [Also in Division E1] Microwave irradiation equipment is mounted upon a vehicle, to permit material deposited upon a road surface to be heat treated during movement of the equipment along the road. Apparatus for applying and rapidly drying markings on road surfaces includes-mounted, in order, along a vehicle (Figs. 4 and 5, not shown) which may be less than one foot in height and is drawn along the road-an infrared preheater (54) for drying the road surface if wet; a paint gun (58) for spraying a paint which has a conductivity of greater than 5 millimhos per cm.; a dispenser (60) for dropping reflecting beads into the wet paint marking; and a series of microwave irradiating slow-wave structures (12A to 12F), each formed of a rectangular waveguide, Figs. 1 and 2, which has its lowermost wall 34 of insulating material, and includes a plurality of transversely extending interdigitated vanes 14, such that substantial radiation of energy downwards from the structure occurs only in the presence of electrically lossy material external to but closely adjacent the lower wall. In the absence of such lossy material, the microwave power is absorbed in dummy loads. In order to provide substantially uniform heating despite non- uniformity in the intensity distribution of the radiated energy transverse to the axes of the waveguide, and despite the decrease in radiated intensity in passing from the input to the output end of each waveguide, the latter are arranged at an angle to the vehicle axis (Fig. 5, not shown), and are mounted in an inclined position (Fig. 8, not shown), such that the output end of each guide approaches closest to the road surface; alternatively, they may be horizontally mounted, and the interdigitated vanes arranged with a spacing which increases toward the output end of the guide (Fig. 10, not shown). The vanes may be either enlarged, as shown in Fig. 2, or tapered, at their lower ends, to influence the radiation intensity and distribution; air may be supplied under pressure to the waveguides, escaping through spaced orifices 41<SP>1</SP> in their lower walls, to drive off vapours released from the drying paint; and the vehicle may be supplied with conductive wire cloth safety shields hung from its sides, to reduce escape of radiation. Control circuitry may be provided to adjust the power source, or the height of the slow wave structures above the roadway, in dependence upon the temperature of the dummy loads, the speed of the vehicle, or the presence of substantial reflected energy, e.g. as produced by the passage of the vehicle over a manhole. Examples of paint compositions having a conductivity permitting the use of the above apparatus and method are referred to.
Patent GB-800639-A (GB)
Title: Manufacture of cation exchangers of the polystyrene-type
IPC: C08F8/34
Filed: 1956-07-05
Abstract: Cation exchange resins are obtained by sulphonating polystyrene beads or grains of from about 0.4 to 0.7 mm. size and cross-linking with formaldehyde or a formaldehyde yielding material in the presence of a strong acid under anhydrous conditions.  The polystyrene is sulphonated, e.g. by chlorosulphonic acid, oleum or concentrated sulphuric acid at room temperature or while raising the temperature to 140 DEG  C. and gaseous formaldehyde or paraformaldehyde added. Alternatively paraformaldehyde may be dissolved in the sulphonating agent and reacted with the polystyrene at room temperature for several days while heating e.g. to 120 DEG  C.  The product is blown with moist air, washed, treated with alkalis such as sodium carbonate, and dried.
Patent GB-389358-A (GB)
Title: Improvements in or relating to breathing apparatus
IPC: A62B9/00
Filed: 1932-07-25
Abstract: 389,358. Respiratory appliances. CHRISTENSEN, A. M. H. L., 66, Moislingerallee, Lubeck, Germany. July 25, 1932, No. 20943. [Class 81 (ii).] In a closed-circuit respiratory appliance the danger of use of the appliance with the main oxygen valve closed is avoided by the provision of a valve 9, which normally closes the breathing circuit, or so obstructs it as to render breathing difficult, and which is opened, on opening the oxygen valve, by the action of the oxygen on a piston 15 connected to the valve 9 by a lever 13. The piston 15 is enclosed in a chamber 10 connected by a pipe 11 to the high-pressure or low-pressure side of the oxygen pressure-reducing valve. In a modification the valve 9 has a central opening obstructed by a whistle or other device adapted to give an audible warning when the valve is closed, that is when the oxygen has not been turned on. Reference has been directed by the Comptroller to Specification 362,573.
Patent GB-311598-A (GB)
Title: Adjustable and transportable conveyors
IPC: B65G23/00
Filed: 1928-07-19
Abstract: 311,598. Potaufeux, E. July 19, 1928. Portable endless-belt conveyers; adjustably supporting driving-gear.-In an endless belt conveyer for feeding sheaves'to a thrashing machine, &c. the spindle of the driving roller 0, Fig. 2, is carried by the forked ends, Fig. 1, of arms R, R<1> provided at the extremities of a casing Z. A pulley N on the spindle of the roller 0 is driven by a pulley L on a shaft K which is mounted slidably in the casing Z and can be moved by an arm U to bring either of the bevel gears I, J into engagement with the gear H. The vertical shaft E which carries the gear H is driven through bevel gears D<1>, D by a shaft C driven from a motor through chain-and-sprocket gearing. The supporting column comprises concentric tubes F, G of which the tube G is fixed to the lower part of the casing Z and the tube F is fixed to the base support A<1>. A depending part A of the base A' is used for attaching the support to a thrashing machine, &c. The outer tube G is rotatable abound the tube F.
Patent GB-795540-A (GB)
Title: Improvements relating to electromagnetic relays
Inventor: BUCKERFIELD PHILIP SIDNEY TEAR
IPC: H01H51/32
Filed: 1955-07-20
Abstract: 795,540. Electromagnetic interrupters. BRITISH THOMSON-HOUSTON CO., Ltd. July 9, 1956 [July 20, 1955], No 21035/55. Class 38 (5). To prevent fouling of the contacts of a lowpower high-frequency relay due to the presence of organic vapours in the surrounding atmosphere, the relay components, before being sealed in a housing, are cleansed from any contaminating organic matter by washing in a degreasing agent and flux solvent and afterwards baked to remove volatile substances. The housing may be evacuated and re-filled with a suitable gas. As shown, the relay comprises an E-shaped core 1 with windings 2, the centre limb being formed by a permanent magnet 5. An armature 4 oscillatable between pole pieces 3 is carried by a non-magnetic arm 6 secured at one end to a support 7. The arm 6 is formed of spring strip made rigid by flanges 8 except at the end adjacent the support 7. L-shaped insulating members 9 on the arm 6 carry contact arms 10 having contacts 11 which co-operate with respective pairs of front and back contacts 12 carried by spring fingers (Figs. 2, 3, not shown). Screws 16 permit adjustment of the contacts 12. Magnetic screens 17 minimize electrostatic and electromagnetic interference. The cover 21 is soldered to the base 18 without the use of flux, and preferably only inorganic insulating materials are employed.
Patent GB-1199540-A (GB)
Title: Circuit Arrangements Employing Complementary Pairs of Transistors.
Inventor: NETTLESHIP ROBERT
IPC: H03F3/30
Filed: 1969-04-24
Abstract: 1,199,540. Transistor amplifying circuits. PYE Ltd. 24 April, 1969, No. 21038/69. Heading H3T. A circuit comprises first, second and third transistors Q1, Q2, Q3 respectively, the second and third Q2, Q3 forming a complementary pair, an input signal is applied to the emitter of the first transistor Q1 and a constant current is applied to its collector, which is connected to the base of the second transistor Q2 while its base is connected to the base of the third transistor Q3; the emitters of the second and third transistors are commoned and connected to a load-as shown, loud-speaker L via capacitor C1-while their collectors are connected to the positive and negative terminals of a power supply. In the embodiment comprising an amplifier, the constant current source comprises resistor R1 which is connected to the join of speaker L and capacitor C1, and the emitter of transistor Q1 is driven from a twostage preamplifier comprising complementary transistors Q4, Q5. Negative feedback is applied from the collector of transistor Q5 to the emitter of transistor Q4 by means of resistor R6 which is shunted by capacitor C3 which prevents high-frequency parasitic oscillation. Overall negative feedback is applied from the loud-speaker L to the emitter of transistor Q4 via resistor R7, the overall gain and lowfrequency out-off being set by resistor R8 and capacitor C2. It is shown in the Specification that the arrangement provides a class AB output stage in which the quiescent current is substantially independent of ambient temperature. The transistor Q2 may be replaced by a low power NPN transistor direct coupled to a PNP power transistor (Fig. 3, not shown).
Patent GB-972667-A (GB)
Title: Production of melamine
Inventor: CORDES HANS
IPC: C07D/
Filed: 1963-05-28
Abstract: Melamine is prepared by reacting cyanogen chloride with ammonia at a temperature between 100 and 1000 DEG C. The process may be carried out in the presence or absence of a catalyst and at atmospheric or superatmospheric pressures. Specified catalysts are active carbon, silicic acid, quartz, aluminium oxide, aluminium phosphate and bleaching clay. Examples are given.
Patent GB-1425768-A (GB)
Title: Rotary switch
IPC: H01H19/64
Filed: 1973-05-04
Abstract: 1425768 Mechanical switches; mounting switches ROBERT SEUFFER KG 4 May 1973 21231/73 Heading H1N A rotary switch comprises a number of stacked units 10, 11, operated by a common rotary shaft 28, the units 10, 11 being mounted on supports 51, 52, which engage slots 55, 56 in the units so that, after removal of shaft 28 any unit 10, 11 can be withdrawn transversely from supports 51, 52 and without requiring detachment of any other unit. Supports 51, 52 have notches 65 to locate the units. A unit is shown in Fig. 2. It comprises a central member 30 having a hole 35 for rotor 12 having openings 13 for the movable contacts 14 and covers 31, 32 carrying fixed contacts 21, 22, 23 terminating in lugs 38 for plugging into a printed circuit board. Covers 31, 32 also have pins 43 mating with holes 44 in member 30.
Patent GB-531436-A (GB)
Title: Improvements in and relating to the purification of mercury in connection with plant in which mercury is used
IPC: F28B1/02
Filed: 1939-07-22
Abstract: 531,436. Purifying mercury. BRITISH THOMSON-HOUSTON CO., Ltd. July 22, 1939, No. 21327. Convention date, July 23, 1938. [Class 82 (i)] Mercury is purified by evaporating some of the mercury contained in a chamber to effect removal of impurities by the vapour discharged from the chamber. Mercury carrying impurities is fed by a pipe 14 to a chamber 12 communicating through an opening 9 with an adjacent chamber 13 from which it is discharged through a pipe 15. The impurities collecting on the surface in the chamber 12 are removed by creating a vacuum by means of a pump 22 which communicates with the chamber 12 through chambers 20, 16 and pipe 17, impurities being collected on the surface of mercury at the bottom of the chamber 16 and removed therefrom through an opening 29. The purifying means is shown in connection with a plant including a condenser 30 and cooling chambers 36, 38 in which non-condensibles accompanying the mercury vapour are cooled, . the condensed mercury being returned from the chamber 20 to the bottom of the condenser 30.
Patent GB-745684-A (GB)
Title: Method of making n, n-dialkylaminoethylamines
IPC: C07C209/48
Filed: 1953-08-04
Abstract: A process for producing an N,N-dialkylaminoethylamine comprises hydrogenating an N,N - dialkylaminoacetonitrile at superatmospheric pressure, at a temperature below 110 DEG  C., and in the presence of a Raney cobalt catalyst.  Preferred reaction temperatures are 60 DEG to 90 DEG  C., and the use of diluents such as cyclohexane, benzene, ether and dioxane is advantageous. Anhydrous ammonia may be added to suppress side-reactions. N-alkyl substituents mentioned are methyl, ethyl, propyl, butyl, hexyl and 2-ethylhexyl groups.  In example (1) N,N-diethylaminoethylamine is prepared by hydrogenation at 1500 lb./sq. in. of N,N - diethylaminoacetonitrile in anhydrous cyclohexane in the presence of ammonia and Raney cobalt at 66 DEG  to 80 DEG  C.  N,N-dimethylaminoethylamine is prepared similarly at 90 DEG  C.  The preparation of the catalyst is described.  Specification 423,735 is referred to.
Patent GB-1101414-A (GB)
Title: Improvements in or relating to vehicle door latches
Inventor: ABRAMS ARNOLD AARON
IPC: E05B65/32
Filed: 1964-05-25
Abstract: 1,101,414. Door latches. WILMOT-BREEDEN Ltd. 25, May, 1965 [25, May, 1964], No. 21456/64. Heading E2A. A vehicle door latch has a rotary latch member 1 and a keeper 20 for latching engagement one with the other, the latch member 1 and the keeper 20 being formed with facing anti-burst surfaces which overlap in the region of the rotational axis 16 of the latch member, with the rotational axis passing through the anti-burst surfaces or disposed substantially at the boundary thereof and which can engage to prevent separation of the latch member and keeper in the direction of said axis. In the embodiment shown the latch is of the zero-torque type with a cam 1 fixed to a spindle 2. The keeper structure comprises a back plate 5 with projecting ribs 6, 7 running along its upper and lower edges. A guide plate 8 is fixed to the main back plate 3 and has guide flanges 9, 10 the lower of which has a spring loaded wedge to prevent rattling. The cam 1 comprises a main portion 13 with a plate like anti-burst and lobe portion 14 from which projects a further lobe 15. On door closure the lobe 15 initially engages the keeper rib 6 and after rotation of the cam, the lobe 15 engages in the recess 18. The lower half of the cam 1 has a groove bounded on the outer side by the plate like portion 14 and its base is contoured to form a step 19 for latching engagement with a tooth 22 on the keeper rib 7. The side of the cam groove provided by the portion 14 and the adjacent side of the keeper plate 20 provide the anti-burst surfaces. The recess 18 is also covered by an antiburst plate 23 so that the inner surface of this plate and the adjacent surface of the cam lobe 15 form further anti-burst surfaces.