baber/WOPTO huggingface dataset:
Patent GB-253196-A (GB)
Title: Improvements in or relating to track circuit signalling systems for railways
IPC: B61L1/18
Filed: 1925-03-12
Abstract: 253,196. British Power Railway Signal Co., Ltd., and Tattersall, A. E. March 12, 1925. Addition to 168,104. Electrical systems, automatic.-In a signalling system of the kind described in the parent Specification, employing alternating track current and a direct current control relay in the plate circuit of a thermionic valve, the grid circuit of which is controlled by the track current, an improved shunting effect is obtained by a device 11, the resistance of which varies with temperature and which has a negative temperature coefficient, included in the connection from the plate 9 through the control relay 10 to one pole of the source of current (not shown). A similar device 12 may be included between the other pole of the current source and the filament 5. A decrease in plate current is thus accompanied by an increase of resistance, resulting in further decrease of current. Preferably, devices 11, 12 are Neon tubes, but other arrangements may be used, such as a heating element in conjunction with thermosensitive material, for example cuprous or cupric oxide, selenide or sulphide of silver, or one of the rare earth oxides used for Nernst lamp filaments. The track current passes through the primary 2 of a transformer, shunted by an impedance 13, to prevent interference by variations of ballast resistance, stray currents, &c. The secondary 3 is connected between grid and filament, and a grid leak 18 is provided, adjusted to prevent false indications by minute or sneak currents. The grid is given bias, preferably negative, by a battery 7 and potentiometer 6, the adjustment of the system being such that, with track clear, the grid is positive with respect to filament, so as to obtain the maximum variation. A relay 16 is included in series with the battery 7, the relay contact 15 being in series with the contact 14 of relay 10 in the control circuit, so as to break this circuit on failure of the battery. To effect economy, the track filament currents mav be applied transiently by a plunger &c. controlled by the signalman, and where alternating traction current is used, the secondary circuit may be tuned to the signalling current. If the supply current to the control relay be alternating, the necessary rectification may be effected by the thermionic valve, or other means may be used to ensure a continuous pull on armature 14, such as a capacity and non-inductive resistance in series across the relav terminals. In some cases a leaky grid condenser may be used in conductor 17.
Patent GB-1065301-A (GB)
Title: Improvements in crimping tools, die parts and the like and in methods for making thesame
IPC: B30B15/02
Filed: 1965-02-17
Abstract: 1,065,301. Making dies for crimping tools, work-holders, collets &c. F. R. DUFFIELD. Feb. 17, 1965 [May 22, 1964], No. 6786/65. Headings B3A, B3B and B3Q. Segments 8, Fig. 2 (not shown), for use as crimping or moulding &c. dies or in a workholder or collet-chuck, have co-operating ribs and recesses 6, 7 which interengage when the segments are closed, preventing further inward movement. In a modification, Figs. 3 and 4 (not shown), the rib is formed by a dowel pin 14 secured in the segment by welding, brazing, shrinking or deformation of the pin and/or segment. The segments are first assembled and then drilled to form the dowel holes, after which the dowels are positioned and the segments machined. The dowels are then removed for hardening. before being finally secured in the larger section 11 of each drilling 11, 12. Alternatively, ribs of square, rounded or V-form may be used. The segments 8 may be closed by wedge-action, operated manually or hydraulically.
Patent GB-105649-A (GB)
Title: Improvements in Two-stroke Cycle Internal Combustion Engines.
Inventor: VOSS EDMUND
IPC: F02B25/00
Filed: 1916-05-15
Abstract: 105,649. Voss, E. May 15, 1916. Two-stroke-cycle engines. - The engine shown in Fig. 5 compresses scavenging air in its crank chamber and combustible mixture in an inclined pump B<1> which discharges into the working cylinder when the ports D, A, C are covered by the main piston. An automatic or a mechanicallyactuated non-return valve is located in the pump delivery pipe. Charges enter the pump B<1> through a terminal port B. An exhaust valve is located in the cvlinder head.
Patent GB-908803-A (GB)
Title: Improvements in or relating to silicates
IPC: C11D3/08
Filed: 1959-02-27
Abstract: <PICT:0908803/III/1> Substantially dust-free agglomerates of a crystalline alkali metal silicate of substantially uniform size are prepared by mixing at least an equal amount by weight of a solid chemically similar alkali metal silicate (defined as chemical compounds composed of alkali metals, silicon, and oxygen in varying ratios, and varying amounts of water of hydration), having a particle size smaller than the desired agglomerates, with a molten alkali metal silicate, and crystallizing to form agglomerates of the solid silicate.  The preferred silicate is sodium silicate pentahydrate. The Figure illustrates a continuous process according to the invention, in which molten feed is fed from tank 1 via pump 2, valve 3, and flowmeter 4 to the crystallizing mixer 5, to which are fed simultaneously fines from bin 6 via metering feeder 7. The crystallizer effluent is passed via elevator 8 to screens 9 p  and 10.  Oversize particles are passed via grinder 11 to bin 6, and fines are passed directly to bin 6.  The product of the desired particle range is passed to bin 12.  Other materials may be added to the silicate prior to crystallization, for example to give products having detergent properties.  Such materials include:- sodium chloride, sodium sulphate, trisodium phosphate, sodium tripolyphosphate, tetrasodium pyrophosphate, sodium hexameta-phosphate, sodium carbonate and sodium hydroxide.  Surface active agents such as sodium salts of fatty acids and rosin acids, sodium alkylaryl sulphonates, sodium dialkyl sulphosuccinates, sodium N-alkyl taurates, sodium N-aryl glycinates, or in minor proportions as the free acids may also be added.  Non-ionic surface active agents such as alkyl phenol polyglycol ethers, alkyl polyglycol thioethers, fatty acid polyglycol esters, and fatty acid alkylolamides, and other materials such as alkali-stable dyes, perfumes and optical brighteners, clays, siliceous fillers, and carboxymethyl cellulose, may also be added.
Patent GB-788091-A (GB)
Title: Apparatus for the pneumatic conveyance of granular material
IPC: B65G53/20
Filed: 1956-03-06
Abstract: 788,091. Pneumatic conveyers. AKTIEBOLAGET SVENSKA FLAKTFABRIKEN. March 6, 1956 [March 8 1955], No. 6993/56. Class 78 (1). The outlets 2 of a series of hoppers 1 are connected to inlets 4 of a conveying conduit 5 which is arranged parallel to an air supply pipe 9. The pipes 5, 9 are connected by short pipes 8 disposed opposite to the inlets 4. Air permeable plates which may be of perforated sheet iron, wire gauze or felt, are placed at the outlets of the pipes 8. The pipes 5, 9 are connected also by a pipe 14 provided with a damper in order that air may be forced through them for cleaning when the end covers 13 are removed.
Patent GB-540576-A (GB)
Title: Improvements in or relating to the production of highly polymeric compounds
IPC: C08G69/50
Filed: 1940-04-19
Abstract: 540,576. Linear poly-acidylamides. ROBERTS, R. P. April 19, 1940, No. 7071. (Class 2 (iii)] In the production of a linear poly-acidylamide for subsequent conversion into shaped articles the polymer is stabilized by means of about 5 per cent or less of formaldehyde, or an equivalent proportion of another aldehyde, based on the weight of the polymer. The term " poly-acidylamide " includes polymeric amides of sulphonic acids as well as those of carboxylic acids. The aldehyde may be added to the already formed polymer, or may be added at any stage during the condensation, which may be carried out in the presence of a solvent for the raw materials and for the polymer itself. An example is given of the preparation of a stabilized polyamide by heating a mixture of hexamethylene diamine-adipic acid salt, paraformaldehyde and xylenol, in an atmosphere of nitrogen.
Patent GB-1362937-A (GB)
Title: Method and apparatus for freezing
IPC: F28F5/02
Filed: 1972-02-16
Abstract: 1362937 Ice-making L'AIR LIQUIDE SOC ANON POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE 16 Feb 1972 [19 Feb 1971] 7247/72 Heading F4H Liquid in a trough 20 is spread as a thin layer on the outer surface of a solid rotary drum freezer and thereafter scraped off by means (not shown), the drum being internally cooled by circulation of a refrigerant fluid, e.g. liquid nitrogen introduced through one end section 4a of a drive shaft and passed sequentially through passages 2a, 2b, 2c ... 2e formed by longitudinal bores in the material of the drum. The drum ends are formed as header channels by annular end plates 13, 14 disposed within recesses 11, 12 of the drum and a pair of shields 15, 15<SP>1</SP> are mounted on supports 18 and form channels 16 which enables the circulation of the refrigerant fluid outwardly from the central part to the periphery of the drum through the passages 2a ... 2e. The eventually vaporized fluid at a temperature approaching that of the drum wall is exhausted through a further section 4b of the shaft.
Patent GB-221530-A (GB)
Title: Improvements in or relating to submarine mines
IPC: F42C14/04
Filed: 1923-03-13
Abstract: 221,530. Elia, G. E., and Vickers, Ltd. March 13, 1923. Mines, marine.-Submarine mines are exploded electrically by auxiliary contact hooks 1, Fig. 11, additional to the usual horns 0<2>, A<3>. on the float O and mine A respectively. the hooks being disposed at intervals on the cables or conductors O<1>, O<2x>, which extend above and below the mine. The hooks, when struck or dragged by a submarine vessel or paravane tow line, cause relative movement between the inner and outer parts of the cables thereby completing an electric circuit to explode the mine. The mine, Fig. 3, has an explosive charge B and a spring-controlled primer E which is urged into contact with a detonator J when a trigger G is released by, a Bowden wire H operated by the pull of the mooring cable P. attached to the sinker N. The safety mechanism H', H<2>, H<3> is that described in Specification 212,971. The firing current is obtained from horn batteries of the Hertz type associated with the usual horns or with the auxiliary firing devices contained in the casings X<1>, Y<1> arranged near the points of attachment of the cables O<1>, O<2x>. Fig. 6 shows in detail the construction of the cable extending from the float 0 to the mine A. The cable proper 0<1>, which houses the electric leads O<3> proceeding from the horn batteries of the float 0, is surrounded by a sleeve 2a carrying the hooks 1. When the hooks are engaged, the sleeve, which is flexibly connected with the mine and float by concertina-like members 5a, 5b, slides on the cable O<1> and raises a spring-controlled striker 6<a>. The striker, which is automatically released when balls 7 engage recesses 8, ruptures a tube 9 containing an electrolyte for energizing the battery 10 of the auxiliary firing- device contained in the casing X<1>. A similar auxiliary firing-device in the casing Y<1> is actuated by a similar sliding sleeve on the cable below the mine. Soluble plugs prevent movement of the sleeves until a predetermined time after immersion. The mine contacts mav be made safe, when the mine is to be tried or lifted, by operating a switch in a bnoy connected to the float 0 as shown in Fig. 11.
Patent GB-1142281-A (GB)
Title: Production of hydroxyalkyl cellulose
Inventor: GILL JOHN ERNEST
IPC: C08B11/08
Filed: 1967-02-16
Abstract: 1,142,281. Hydroxyalkyl cellulose. IMPERIAL CHEMICAL INDUSTRIES Ltd. 19 Jan., 1968 [16 Feb., 1967], No. 7401/67. Heading C3A. Crude hydroxyalkyl cellulose containing water-soluble salts is purified by reacting a suspension of the cellulose in a liquid medium with glyoxal under acid conditions at elevated temperature and then washing it with water at acid pH. The crude hydroxyalkyl cellulose is advantageously prepared by reacting cellulose in suspension in the liquid medium with alkylene oxide or a monochloro derivative thereof in the presence of alkali, e.g. ethylene oxide or ethylene chlorohydrin forming hydroxethyl cellulose. The reaction of the hydroxyalkyl cellulose with glyoxal should preferably be carried out in the temperature range 40 to 80 C., and glyoxal should preferably be used in an amount not less than 2À5% by weight of the hydroxyalkyl cellulose. The preferred pH of the liquid medium is 2 to 4À5, which conveniently comprises isopropyl alcohol or acetone which is conveniently acidified by hydrochloric or nitric acid. The glyoxal-treated hydroxyalkyl cellulose may be separated from the suspending liquid in a filter or centrifuge and washed with neutral water, preferably at 5 to 30 C.
Patent GB-392702-A (GB)
Title: Improvements in and relating to signal lamps and the like
IPC: B61L7/10
Filed: 1932-03-12
Abstract: 392,702. Signal &c. lamps. SWAN, C. H., 31, East Mount Road, and OSBORNE, G. W., 3, Railway Cottages, Copmanthorpe, both in York. March 12, 1932, No. 7428. [Class 75 (iv).] Mounting electric lamps in lanterns.-A signal or like lamp is provided with main and emergency electric incandescent bulbs movably mounted with the main bulb normally located at the focus of the mirror and/or lens system, and means which, on failure of the main bulb, illuminate the emergency bulb and thereupon move the latter so that it replaces the main bulb at the focus. A plate 20, which is pivoted at the rear and rests at the front on the springs 45 and is adjustable by bolts 46 and nuts 47, supports the bulb mounting. The bulbs 8, 9 are mounted on a carriage 7 supported by a column 14 rotating in a bearing in the plate 20 and a second bearing 13 carried by an arched bracket 12 mounted on the plate 20. Fixed to the column 14 near its base is a disc 21, a clock spring being attached at one end thereto and at the other end to the plate 20. When the bulb 8 is in order and at the focus of the reflector 3, an upstanding abutment 27 on the plate 21 is engaged by a latch 26 which forms the nose of the armature of a doublewound electromagnet 32. The latch 26 is carried by a spring (shown diagrammatically as 28 in Fig. 5), and adjusted by a screw. As shown in Fig. 5, current passes from the battery 30 through the two coils 36, 37 of the electromagnet 32, through an relay 33 which holds closed a switch 34 completing an indicating circuit and which holds open a switch 38, and through the bulb 8. The bulb 9 is connected to the switch 38, a balancing impedance 39, and one coil 36 of the electromagnet. When current is passing through both the coils 36, 37 their effect on the latch 26 is neutralized. If the bulb 8 fails, the relay 33 releases the switches 34, 38, and the latter closes the circuit through the bulb 9 and the coil 36 of the electromagnet, so retracting the armature and the latch 26, and releasing the plate 21 and column 14 which, under the action of the clock spring rotate until the abutment 27 is brought against a stop, when the bulb 9 is at the focus of the reflector 3. The stop is a spring plunger mounted on a bracket 41 on the plate 20, and is adjustable by a nut 43. The relay 33 and impedance 39 are mounted at the side of the lamp casing on an insulating base within a cover. The reflector has a clear central part 4 corresponding with a window 5 through which the lamp bulbs can be viewed, the bulb 9 having a violet or other coloured zone which gives a coloured beam through the window 5 when in position. The plate 21 may also be marked so as to indicate that the main bulb has failed. In other forms, the two bulbs may be mounted side by side on a swinging or sliding carriage.
Patent GB-867073-A (GB)
Title: Process for the manufacture of 6-chloro-7-sulphamyl-3:4-dihydro-1:2:3-benzothiadiazine-1:1-dioxide and its salts
Filed: 1959-01-22
Abstract: 6- Chloro-7- sulphamyl-3,4- dihydro- 1,2,4-benzothiadiazine-1, 1-dioxide and alkali metal salts thereof are prepared by reducing the C=N double bond in 6-chloro-7-sulphamyl-1, 2,4-benzothiadiazine-1,1-dioxide by means of sodium borohydride, or electrolytically (see Group XXXVI), and, if desired, converting the product, when in the form of an alkali metal salt, into the free compound, or, when in the form of the free compound, into an alkali metal salt thereof.
Patent GB-863463-A (GB)
Title: Improvements relating to thermionic valve grid winding machines
Inventor: LANE CLAYTON ARBUTHNOT
IPC: H01J19/00
Filed: 1958-03-07
Abstract: 863,463. Winding thermionic valve grids; forging. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. March 3, 1959 [March 7, 1958], No. 7476/58. Classes 83 (2) and 83 (4). A thermionic grid winding machine having means for rotating the grid and means for causing the grid to progress along its axis of rotation so that a grid wire can be wound thereon in helical fashion includes an arrangement for notching the grid support wires, that is forming protrusions thereon, comprising a head arranged to rotate in synchronism with the grid and carrying two notching punches positioned diametrically opposite each other along a line normal to the axis of rotation of the grid when being wound, and driving means for simultaneously forcing both punches radially inwardly, said driving means being cocked when the grid has progressed axially by a predetermined amount, and is operated when the head reaches a particular angular position after said cocking. Slotted ends 4, Fig. 1a, of punches 9 squeeze the metal of grid support wires 1 against an anvil 2, formed as part of a grid-winding nose, to form notches or protrusions at spaced positions 5, 6 along the wires, the grid being rotated and moved axially by means not shown. A head 8, which rotates with the grid being wound, houses two diametrically opposed @pinches. A pivoted lever 11 is urged by a strong spring 13 against a cam 10 geared to the grid rotating means and when the tip of the lever 11 drops off the step of the cam, a pawl 32 on the other end of the lever 11 strikes a plate 14 on a pivoted lever 15, biased by a weak spring 17, to push a top arm 18 and pull a bottom arm 19. This causes arms 24, 25, which are pivoted at 28, 29, to be moved by springs 26, 27 from an uncocked position, in which a step 22 (or 23) is engaged by a pin 20 (or 21) on the arms 18 (or 19), to a cocked position in which a step 30 (or 31) is engaged by the pin 20 (or 21). Thus the next time the punches 9, in their rotation about the grid axis, pass the arms 24, 25, they will be moved inwardly by engagement with a part a thereof to effect the notching. The cam 10 may have two lobes if two pairs of notches at each end of the grid are to be formed. In a modification, Fig. 5, push-rods 46 replace the punches 9 and engage levers 47 carrying punches 51.
Patent GB-363245-A (GB)
Title: Improvements in ash receptacles for smokers' use
IPC: A24F19/06
Filed: 1931-03-11
Abstract: 363,245. Smokers' ash receptacles. HENNAH, H. S., 14, Regent Arcade House, Oxford Circus, London. March 11, 1931, No. 7512. [Class 130.] The inlet opening 3 of an ash receptacle is provided with triangular flaps 5 each pivoted about one edge 6, the flaps being retained in a horizontal position, by counterbalance weights 8 or by light springs, but turning about their pivots under the weight of a cigar or cigarette butt &c. to admit the object into the receptacle. As shown, the flaps are arranged in the form of a square. The bottom 9 of the receptacle is convex in order to deflect cigar &c. butts to the sides.
Patent GB-815320-A (GB)
Title: Improvements in or relating to portable presses for assembling frameworks and other work-pieces
IPC: B25B5/14
Filed: 1958-03-10
Abstract: 815,320. Cramps. KNœP FER, S. March 10, 1958 [March 13, 1957], No 7532/58. Class 61. [Also in Group XXIX] A portable press for glueing together workpieces in the form of slabs, consists of a plurality of hydraulic hand presses 7 mounted on guide bars 6 suspended on the inclined faces 1 of a frame. Brackets 24 are hung on dogs 23 below the presses 7 while the pressure is applied. Each press has a relief valve ensuring equal application of pressure by all the presses.
Patent GB-487831-A (GB)
Title: Improvements in and relating to rotary printing machines
IPC: B65H7/18
Filed: 1938-03-11
Abstract: 487,831. Printing - machines. RONEO, Ltd., and MARSHMAN, J. O. March 11, 1938, No. 7604. [Classes 100 (i) and 100 (ii)] Feeding sheets ; stopping-arrangements.-In connection with a rotary printing-machine of the kind in which sheets are supplied automatically to the forme cylinder from a feed board which is moved upwards to maintain the pile top at constant level, a common control member is provided for actuating a clutch to stop the feed mechanism and also to release the feed board so that it can be lowered to receive a fresh supply of sheets. The control member consists of a lever 2 connected to a vertical link 5, the movements of which effect the desired control operations by actuating a pivoted member 20 for controlling a clutch 22 and a lever arm 14 adapted to release a pile-raising ratchet 16 from the action of a pawl 15. The control lever 2 can be held by a catch 10 which engages one of three apertures 9 in positions corresponding (1) to that shown in Fig. 4 in which the clutch 22 is thrown out and the pawl 15 tripped ; (2) to a position in which the clutch is in and the pawl 15 is operative ; and (3) to an intermediate position shown in Fig. 2 in which the catch 10 engages the middle aperture 9 and the members 14, 20 have not effected their operations. The preliminary downward movement of a link 5 extends a spring 26 which is connected to the end of the link 5 and to a pin 24 on a link 18 connected by a link 19 to the member 20. The spring 26 presses the member 20 towards the clutch 22 but the member can only move to operative position when a gapped part 27 of the clutch permits. The link 5 in its intermediate position actuates a link 11 so as to bring the end of a slot 12 into contact with a pin 13 on the member 14 so that on a further depression of the link 5 to the position shown in Fig. 4 the member 14 is caused to trip the pawl 15. The spring 26 is also further extended and the member 20 actuates the clutch 22 by engaging a cam surface formed on one side face of the clutch. The drive to the feeding mechanism is thus thrown out.