baber/WOPTO huggingface dataset:
Patent GB-1214954-A (GB)
Title: Improvements relating to electrical power supply arrangements
Inventor: HIGHT MICHAEL JOHN
IPC: H04N3/18
Filed: 1969-05-05
Abstract: 1,214,954. 954. Automatic voltage control. MULLARD Ltd. May 5, 1969, No.22809/69. Heading G3R. [Also in Division H2] A power supply comprising two or more D.C./ D.C. converters each of which consists of a transistor oscillator 25, a rectifier 55 and an automatic voltage regulation circuit and in each of which there is included an output transformer 33 having an isolated output circuit, is characterised in that the output circuits are connected in cascade. The output at the collector of the transistor 25 is rectified by diodes 40, 41 to provide a D.C. signal proportional to the amplitude of the oscillatory signal, which is fed to one transistor 29 of an emitter coupled pair. The other transistor 28 of the pair receives a reference voltage derived from Zener diode 48 and the output is fed to transistor pair 26, 27 which control the amplitude of oscillation. In the event of an overload, transistor 29 cuts off and cuts off transistor 31. Transistor 30 then becomes conductive to bias off both transistor 28, 29 and stop the oscillator. The rectifier 55 may be replaced by a simple rectifier. The outputs of several such converter may be connected in cascade to the electrodes of an electronic imaging tube, Fig. 1 (not shown). (For Figures see next page)
Patent GB-423450-A (GB)
Title: The manufacture of halogenated vat dyestuffs
IPC: C09B5/40
Filed: 1933-08-15
Abstract: Chlorinated derivatives of compounds of the formula <FORM:0423450/IV/1> in which one of the positions X may be occupied by an acylamino group (see Specifications 24604/08, [Class 2], and 339,396, [Class 2 (iii)]), are obtained by treating the compounds with a chlorinating agent under such conditions that not more than 2 chlorine atoms are introduced, or by partially dehalogenating the higher chlorinated products obtained by customary chlorination methods, with specified dehalogenating agents.  According to examples, the above described condensation product, unsubstituted, is treated with (1) benzoyl chloride; (2) sulphuryl chloride, in presence of iodine or in nitrobenzene as solvent; (3) sodium sulphide after chlorination by customary methods; (4) concentrated sulphuric acid after chlorination; or (5) hydrazine hydrate or hydrosulphite after chlorination; and the above condensation products in which the 5-position is benzoylated, or acetylated, are treated with sulphuryl chloride or chlorinated to 40 per cent following by vatting with hydrosulphite to dehalogenate.  All the products contain about 2 atoms of chlorine per molecule and dye bluish-green shades of superior fastness.  The acylation of the condensation products containing an amino group in position X may be combined with the chlorination, advantageously in presence of a diluent.  The dehalogenation of more highly chlorinated derivatives is partially effected by precipitation from concentrated sulphuric acid and may be combined with vatting and fixation of products on the fibre.
Patent GB-881005-A (GB)
Title: Quick-acting fluid flow control valve
IPC: F16K31/14
Filed: 1958-07-16
Abstract: 881,005. Valves. LICENTIA PATENTVERWALTUNGS-G.m.b.H. July 16, 1958 [July 29, 1957], No. 22819/58. Class 135. A quick-acting valve comprises within a casing 25 a valve closure member 10 which coacts with a valve seating 46 and is provided with a spindle 11 carrying a retainer plate 29 for a loading spring 30. A connecting rod 16 extends from the spindle 11 and is connected to a crank mechanism comprising a screwed sleeve 37, a disc 39, ball bearings 42, a ring 38 and a pair of crank webs 21. The disc 39 is connected by two universal joints 47, 48 to a longitudinally movable spindle 49 which is rotatably connected to a hand wheel 51. In operation the mechanism is normally in the position shown with the ring 38 held by gravity or by a spring against a stop pin 43 so that the spring 30 is stressed. If the pin 43 is depressed to push the crank mechanism over the top dead centre position the spring 30 is released to close the valve quickly. The actuating mechanism may be returned to its initial position by first rotating the hand wheel in one direction to bring the crank mechanism to the position shown and then in the other direction to open the valve and stress the spring 30. It is suggested in the Specification that the pin 43 may be hydraulically actuated or hydraulically released for spring actuation.
Patent GB-919279-A (GB)
Title: Improved overrunning coupling
IPC: F16D41/08
Filed: 1961-06-23
Abstract: 919,279. Ratchet clutches. FORD MOTOR CO. Ltd. June 23, 1961 [June 24, 1960 (2)], No. 22869/61. Class 80 (2). [Also in Group XXXIV] A unidirectional or bidirectional overrunning clutch or detent comprises one set or two oppositely acting sets of jamming rollers which are engageable and/or releasable by fluid pressure means. In one embodiment rollers 58, 60 are located in cavities 52 in an outer race 48 and are urged together out of engagement with oppositely directed cam surfaces 54, 56 by spring-urged pistons 84, 88. Admitting fluid pressure through a port 64 to the space between the rollers urges the rollers into engagement with the cam surfaces to lock the outer race to an inner race 46, this engagement being aided by a weak spring 62. Pressurizing the space behind piston 84 or 86 releases the associated roller so that overrunning is allowed in the appropriate direction. In a modification the springs acting on the pistons are omitted, the spring 62 thus locking the races in the absence of pressure behind the pistons. In another embodiment having two sets of rollers, these are disposed in separate cavities and the rollers are urged into the engaged position by fluid pressure only, springs equivalent to the springs 62 being omitted. In all embodiments the pistons associated with one set of rollers are rigidly interconnected so that they move simultaneously.
Patent GB-1432539-A (GB)
Title: Method of forming pipe
IPC: F16L9/127
Filed: 1972-05-16
Abstract: 1432539 Forming sockets on pipes YORKSHIRE PLASTICS Ltd 3 May 1973 [16 May 1972] 22901/72 Heading B5A A pipe or pipe portion 1 of orientable thermoplastic polymeric material is placed in a female mould 3, 2, heated, and forced radially outwards to conform to the female mould with enlarged diameter portions 9, 11. In one embodiment, the enlarged diameter pipe is cut in two along a line 12 to form two pipes, each having a grooved socket 9, 11; alternatively, one or both ends of the female mould 3, 2 define grooved sockets (see Fig. 3, not shown). After placing the pipe or pipe portion in the split steel mould 3, 2 (which can be curved) and affixing seals 4, hot water is passed around the pipe, and is then diverted through the pipe and pressurized to cause the increase in diameter and orientate the molecules. Pressurized cold water is circulated for cooling. A collapsible mandrel (17) (see Fig. 4, not shown) having a projection (20) corresponding to the groove 11 is then inserted into the grooved pipe end, which is heated to (48-110) C. for shrinkage on the mandrel for accurate dimensioning. In an alternative embodiment, hot and cold water baths and pressurized N 2  or air are used. A straight pipe can be bent using a sand core. Materials include unplasticized or chlorinate PVC, polypropylene, ABS or polythene.
Patent GB-149693-A (GB)
Title: A new or improved elastic coupling means for use between toothed gearing and a driving shaft
IPC: F16D3/77
Filed: 1920-08-03
Abstract: 149,693. Aktiebolaget Ljungstr÷ms Angturbin. Aug. 4, 1919, [Convention date]. Toothed gearing.-Pinions 2 employed in toothed gearing are elastically connected with the driving-shafts 8, actuated by a motor 1, by intermediate shafts 7 movable axially through the pinion sleeves 3 and carrying diaphragm or other elastic couplings 6, 9 connected respectively to the sleeves 3 and shaft 8. In the form shown in Fig. 2, the shaft 7 is connected to the driving- shaft 8 and the pinion 23 by diaphragm couplings of which one part 13 or 14 is connected to the member 8 or 23 by screws 25 of which the heads project into holes 24 in the other part 12 or 15, both of which are connected to the member 7 by conical connexions and wedge keys 26 kept in position by nuts x engaging a central bolt 10. In the diaphragm coupling, the diaphragm may be interconnected at the centre and the peripheries connected to the parts to be coupled.
Patent GB-144931-A (GB)
Title: An improved tubing and means for producing same
IPC: B29D23/18
Filed: 1919-03-19
Abstract: 144,931. Blaisdell, F. E. March 19, 1919. Hose and flexible pipes; fibrous pipes. -Corrugated pipes and containers are manufactured from anv flexible material other than rubber which can be moulded to take a permanent set e.g. a fabric such as linen, a membrane, celluloid or other material free from rubber, the material being corrugated and coated with flexible varnish before or after corrugating. A spiral corrugated former 1, Fig. 1, may be used, or a plain former on which a spiral wire is wound, and layers of fabric are laid longitudinally or spirally on the former and are pressed into contact with the former by an external spiral wire or cord 5. The layers of fabric are connected by adhesive, and the layers are coated with a linseed-oil varnish, or one formed of pyroxylin, or gelatine, and an oil, or the finished tube may be so coated. When celluloid is employed, it may be treated with heat or amylacetate to render it plastic during the forming operation, and any means or solvent may be used generally with the materials to render them plastic. The tubes may in addition be treated with potassium or other bi-chromates, to render them impervious. The finished pipes &c. may be fitted with external or internal spiral armourings, which may be the spirals used in the manufacture, or others which are substituted for these.
Patent GB-811310-A (GB)
Title: Method of hardening epoxide resins
IPC: C08L63/02
Filed: 1955-08-09
Abstract: Curing agents for epoxy resins comprise aliphatic open chain polyamines containing at least two tertiary amino groups and free from other substituents capable of reacting with epoxy groups. The epoxy resins are those obtained by reacting in known manner a polyhydric phenol, e.g. resorcinol, hydroquinone, bis-phenol with epichlorhydrin in alkaline medium.  Tertiary amines specified are tetramethyl - ethylene diamine, tetramethyl - di - ethylenetriamine, pentamethyl - diethylene triamine, hexamethyl - triethylenetetramine, heptamethyltetraethylene pentamine, bis(N : N - diethylamino - ethylaminoethyl)-amine, bis - (N : N - dimethylaminoethyl) - ether and -sulphide, tri - (N : N - diethylaminoethyl)-amine, N : N : N1 : N1 - tetramethyl - 1 : 2 - di - aminopropane and -2 : 4 - diamino - 2 - methyl - pentane; especially suitable are polyalkylene polyamines which contain 3-5 N atoms of which the end N atoms are tertiary.  The amines specified can be used for hardening epoxy resins at a relative humidity of 90-100 per cent at 10-50 DEG  C. and are used in amounts of 1-20 per cent by weight of epoxide resin.  250 parts epoxide resin are dissolved in 300 parts butyl acetate, 300 parts toluene and 150 parts ethylene glycol monomethyl ether.  100 parts of the solution are mixed with 1.75 parts pentamethyl-diethylene triamine; the solution applied to glass plates hardens to a film at 95-100 per cent humidity.  In Example (3) the resin is dissolved in a mixture of dibutyl phthalate and cyclohexanol and hexamethyl-triethylene tetramine is added; (6) a viscous polyamide resin obtained by condensing an aliphatic polyamine with an unsaturated dimerised fatty acid is mixed with pentamethyl diethylene triamine and the mixture dissolved in xylene and ethylene glycol ether is mixed with a solution of an epoxide resin in the same solvents; (7) a solvent-free cold curing paste filler is made by mixing in a pug mill an epoxide resin, dioctyl phthalate, benzyl alcohol, heavy spar, french chalk and red iron oxide; the pulp is mixed with the polyamide resin of (6) and hexamethyl-triethylene triamine.
Patent GB-487815-A (GB)
Title: Improvements in or relating to vacuum cleaners
IPC: A47L9/04
Filed: 1937-08-21
Abstract: 487,815. Vacuum cleaners. AIR-WAY ELECTRIC APPLIANCE CORPORATION. Aug. 21, 1937, No. 22987. Convention date, Aug. 25, 1936. [Class 8 (i)] A guard for the nozzle of a vacuum cleaner comprises a web 28 formed with terminal U - bends, and cross arms 30 with hooks, co-operating with buttons 32 on the nozzle lips. Specifications 487,801 and 487,806 are referred to. The Specification as open to inspection under Sect. 91 states that the wheels 40 are carried by arms fixed on a shaft 45 which also carries an arm 52 fixed in adjustable position to adjust the height from the floor. An attachment 60 for auxiliary tools or suction hose is normally closed by a cap 61 on a shaft carrying also a valve 66 controlling commmication with the fan. This subject-matter does not appear in the Specification as accepted.
Patent GB-1430106-A (GB)
Title: Camera shutter
IPC: G03B9/36
Filed: 1973-05-15
Abstract: 1430106 Camera shutters SEIKO KOKI KK 15 May 1973 [16 May 1972] 23084/73 Heading G2A A camera shutter comprises a base 3 and a plate 1 having an aperture 2a, 2b respectively; between the base and plate at least one blade 6a is mounted whose edge 6f defines an exposure slit with the aperture and is movable between a closed position, Fig. 2, to an open position, Fig. 4 (not shown), the blade 6a is pivotally connected at 5b to an operating arm 5, which in turn is pivotally connected at 4b to an operating lever 4; the blade 6a and arm 5 also carry guide pins 6g and Sa which move in guide slots 1a, 1b respectively provided in the plate 1 so that when lever 4 rotates clockwise about pin 4a blade 6a moves parallel to the side of the aperture. A group of aperture-covering blades 6b, 6c, 6d and 6e are associated with the blade 6a. Blade 6b is pivotable about pin 4b. Blades 6c, 6d and 6e pivot about a fixed pin 8 and each have slots 6j, 6k, 6m respectively through which the pin 4b passes. The pin 4b also passes through a slot 3a in the base 3 so that on rotation of lever 4 the blades are successively pivoted. The embodiment shown comprises a further similar set of blades 11  which serve to close the aperture and terminate exposure. In an alternative embodiment, Fig. 5 (not shown), the arm 5 is slidably instead of pivotally mounted on the lever 4.
Patent GB-697328-A (GB)
Title: Device for detecting and preventing excessive entrainment in gases of liquid
Inventor: MOON AMOS FREDERICK WILLIAM
IPC: E03F1/00
Filed: 1950-09-20
Abstract: 697,328. Separating liquid particles from air. HALL & CO., Ltd., M. Aug. 14, 1951 [Sept. 20, 1950], No. 23108/50. Class 123 (iii) [Also in Group XVIII] In an apparatus comprising means for separating liquid which may contain solid particles from suction air, e.g., a frustroconical screen 10 for arresting solid particles and a baffle tube 4 for precipitating drops of liquid and having a chamber 1 for collecting said drops, an automatic signal warns the operator when the separated liquid reaches a predetermined low level in the collector and means is provided for stopping automatically the gas suction when the separated liquid reaches a predetermined high level in said chamber 1. The warning signal comprises electrodes 15 adapted to be bridged by water in a downward extension 3 of the chamber 1, and the suction fan motor is stopped when a float 25 abuts a tappet 38 of a plunger 36 to open a normally closed mercury switch 33 mounted on pivoted lever 32. In operation, air entering at a suction inlet 2 after passing the screen 10 enters the tube 4 through a screened opening 12 and passes out through a duct 17, water being collected in the chamber 3 which has a drain cock 14 and an inspection window 13. In the event of failure of the switch 33 being actuated, continued rise of water level in the tube 4 forces the float 25 against a seating 22 and prevents access of water into the outlet duct 17 leading to the fan inlet. The switch 33 and arm 32 are housed in a sealed cap 26, and a tube 37 guiding the plunger 36 has pressure equalizing ports 40, 41, the former being closed by a sleeve 42 when the plunger is engaged by the float 25.
Patent GB-517789-A (GB)
Title: Improvements relating to trailing or drag devices used with trawl nets
IPC: A01K75/06
Filed: 1938-08-05
Abstract: 517,789. Trawling-gear. CHANT, J. Aug. 5, 1938, No. 23168. Addition to 450,239. [Class 48] The rollers forming components of a trailing or drag device for a trawl net comprise a tyre portion 5 clamped between nuts 6,7 on a body 8 ; the several rollers being joined by a suitable coupling 9. The tyre portion is made up of a number of side wall portions of discarded pneumatic tyres.
Patent GB-388054-A (GB)
Title: Process for the manufacture of arsenic compounds
IPC: C07F9/70
Filed: 1931-08-17
Abstract: Organo-arsenic compounds are prepared by interaction of primary aromatic arsines with inorganic trivalent arsenic compounds, e.g. arsenic trioxide or an arsenic trihalide, oxygen being excluded from the reaction.  The products, which are stated to be different from those referred to in Specifications 24420/12 and 14409/13, [both in Class 2 (iii), Dyes &c.], possess therapeutic properties.  In so far as they contain amino groups, they may be treated with formaldehyde sulphoxylate or formaldehyde bisulphite. The original products, as well as their sulphoxylate and bisulphite compounds, may be reacted with metallic compounds to form addition or complex compounds, and if desired the formaldehyde sulphoxylate or bisulphite residue may then be introduced.  According to the examples, (1) 4-hydroxy-3-aminophenylarsine acetate is stirred in methyl alcohol or acetone with arsenic trichloride in different proportions; the reaction may also be effected in aqueous acid or alkaline solution; (2) p-aminophenylarsinic acid is reduced with zinc dust to the arsine, arsenious acid added, and then formaldehyde and sodium bisulphite; (3) the products of (1) are treated with sodium formaldehyde sulphoxylate in varying proportion; (4) a product of (1) is reacted with sodium formaldehyde bisulphite or sulphoxylate and then with gold chloride; the sulphoxylate compound is also treated with stannous chloride, cupric chloride or hydroxide, or lead acetate and the bisulphite compound with zinc chloride; (5) a product of (I) is treated first with cupric chloride and then with sodium formaldehyde sulphoxylate; (6) p-phenylglycine-arsinic acid is reduced with zinc dust to the arsine and treated with arsenious acid; (7) 4-hydroxy-3-aminophenylarsine acetate is reacted with arsenious acid and the product converted into its sodium formaldehyde bisulphite compound; the latter is then treated with silver nitrate; (8) 3 : 4-benzimidazole-arsine, prepared by reduction with zinc dust of the corresponding arsenic acid (itself obtained by treatment of 3 : 4-diaminophenylarsinic acid with formic acid), is reacted with arsenious acid in methyl alcohol solution.
Patent GB-983220-A (GB)
Title: Improvements in clamps for laboratory apparatus
Inventor: LAWSON PETER ARTHUR
IPC: B01L9/00
Filed: 1962-06-16
Abstract: 983,220. Clamp fastenings. HELIX (UNIVERSAL) CO. Ltd. June 13, 1963 [June 16, 1962], No. 23271/62. Heading E2B. A clamp for laboratory apparatus is adapted to be mounted on an upstanding support and has a relatively fixed jaw 2 and a movable jaw 5 which is controlled by a clamping screw 14, the jaws when the clamp is in position projecting laterally of the upstanding support and the relatively fixed clamping iaw being made of a non-metallic material and the movable clamping jaw being a metal blade secured at its inner end to an opposed face of the fixed jaw so as to be able to flex about the secured end under the control of the clamping screw. The metal blade is either resilient or influenced by a spring 12 acting between the blade and the fixed jaw. In the construction shown the jaw 2 is made of wood and each jaw has a cushioning pad 11 secured by adhesive. The jaw 5 is biased to its releasing position by leaf spring 12 and the screw 14 which moves it to the clamping position is of metal and screws into the metal bush 16 received in the wooden jaw 2. In a modification however the spring 12 can be omitted. The clamp is secured to a post by a metal sleeve 25 received in an aperture at one end of the jaw 2 the sleeve being contracted by a metal screw 24 which screws into a metal bush 22.
Patent GB-1423855-A (GB)
Title: Control arrangements for regulating heating elements
IPC: F02M31/125
Filed: 1973-05-16
Abstract: 1423855 Automatic control of temperature ROBERT BOSCH GmbH 16 May 1973 [17 May 1972] 23276/73 Heading G3R A P&D control arrangement 7, for heating and controlling the temperature of fuel fed to an internal combustion engine, comprises a bridge circuit including resistive elements 11, 12, 13, 14, the element 11 being a heater for a fuel injection nozzle (not illustrated) and serving also to sense the fuel temperature, the bridge being balanced when element 11 and hence the fuel, have a desired temperature. The heating power and rate of fuel feed combine to determine the temp. of the element 11. Unbalance voltage of the bridge due to deviation from a desired temp. is fed to an operational amplifier 16 which produces an output having a magnitude and sense dependent upon the deviation. This output and that of a differentiator R24 C23 controls, via transistors 19 and 15, the bridge supply voltage and hence the current through the heater 11 so as to maintain its resistance constant and restore the bridge balance. A transistor 9 forms a potential divider with a resistor 10 and is controlled in dependence upon the potential at a point 17 of the bridge. Any change in the heating current through 11 is reflected in a change in the potential at the junction point of divider 9,10 which controls transistors 5, 6, 7 whereby to control heating current through further injector heaters 1, 2 and 3 so as to follow changes in current through heater element 11. A feedback loop comprising R 21  C 22  prevents control oscillations, which could otherwise occur due to heat transfer inertia of element 11. To ensure rapid regulation of the temp. of fuel during acceleration, the differentiator comprising a potentiometer 25, coupled to the accelerator pedal or butterfly valve, and a capacitor 23 provides a differential characteristic. Any variation in potential at the potentiometer tap 24 causes a momentary variation in the bridge supply voltage until C 2  3  has been changed. If the fuel supply is interrupted causing excessive increase in temperature of element 11, the bridge supply voltage will be greatly reduced and transistors 5, 6, 7 blocked cutting off the heaters 1,2,3.