baber/WOPTO huggingface dataset:
Patent GB-696846-A (GB)
Title: Improvements relating to high temperature electric lamps
Inventor: OAKLEY PERCY DALE
IPC: H01J61/34
Filed: 1951-03-30
Abstract: 696,846. Electric discharge lamps. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd. March 21, 1952 [March 30, 1951], No. 7467/51. Class 39(i) [Also in Group XI] The light source of a high temperature gas or vapour discharge lamp operating at high intrinsic brilliance is closely surrounded by a quartz envelope which acquires a high temperature when the lamp is in operation and which is rendered diffusing by the deposition on its outer surface of fine particles of silica produced by burning a silicate ester to form a smoke, the whole being enclosed in a larger outer vessel which runs at a much lower temperature than the quartz envelope and may be made of glass and either sealed or unsealed. The smoke that is deposited on the quartz envelope may be produced by burning ethyl silicate in oxygen at a burner provided with fine jets through which the silicate is forced, whereupon silicon dioxide is produced in the form of particulate smoke. The envelope may be rotated during the deposition of the coating, or the jets may be rotated around the envelope. The invention is applicable to screens within electric incandescent lamps, (see Group XI).
Patent GB-231188-A (GB)
Title: Improvements in and relating to electron discharge apparatus
IPC: H01J27/26
Filed: 1923-12-21
Abstract: 231,188. British Thomson-Houston Co., Ltd., (Assignees of Kingdon, K. H., and Langmuir, I.) Dec. 21, 1922, [Convention date]. Low-pressure metallic-vapour apparatus.- The space charge in an electron discharge device is neutralized by the generation of positive ions independently of and without gas ionization by collision or electron impact, by means of an auxiliary heated electrode which is in contact with a gas or vapour having a lower electron affinity than the heated electrode. An evacuated container 1 contains a tungsten or other cathode 2 heated by a current supplied from a battery 6. Surrounding the cathode is a cylindrical tungsten or other anode 8, between which and the cathode is connected an external circuit containing a source of current 11 and. a load 12. Situated between the anode and cathode is a coiled tungsten or nickel filament 13 heated by current supplied from a battery 17 and serving to generate positive ions. The electrode 13 is not maintained at any definite potential with respect to either of the other electrodes. After evacuation of the container 1 a material, having in the vapour or gaseous state a low ionizing potential, is introduced. This material is preferably caesium or rubidium, or other member of the alkali group. This may be introduced from a reduction tube communicating with the discharge tube and provided with a material which evolves the alkali metal, for example a mixture of caesium chloride and excess of a reducing agent such as magnesium or calcium. An excess of the metal may be introduced, as shown at 20, the tube being then sealed off at 19. The vapour pressure of the iongenerating material may be controlled by an external heater or heat insulator, as indicated at 21. In the case of caesium the temperature should be below 70‹ C., corresponding to a vapour pressure of 0.0001 mm. of mercury. The electrode 13 should be heated to at least 1000‹ C., as explained in Specification 208,728.
Patent GB-1090794-A (GB)
Title: Mixtures of water-insoluble disazo dyestuffs and process for their manufacture
IPC: C08K5/23
Filed: 1965-02-22
Abstract: The invention comprises mixtures of yellow water-insoluble disazo-dyestuffs consisting of two symmetrical and one asymmetrical dyes of the formulae <FORM:1090794/C4-C5/1> <FORM:1090794/C4-C5/2> <FORM:1090794/C4-C5/3> wherein (a) R1 and R2 are methyl groups and R3 is a hydrogen atom, or (b) R1 and R3 are methoxy groups and R2 is a chlorine atom. They are prepared by coupling tetrazotized 4,41 - diamino 3,31 - dichlorodiphenyl with 2 moles of a mixture of (a) 1-acetoacetylamino 2-methoxy benzene and 1-acetoacetylamino 2,4-dimethylbenzene; or (b) 1-acetylamino 2-methoxy benzene and 1-acetylamino 2,5-dimethoxy 4-chlorobenzene, the coupling components being used preferably in a weight ratio of 20:1 to 1:20 with reference to 1-acetylamino-2-methoxybenzen.  Coupling may take place in presence of nonionic, anionic or cationic dispersing agents and an organic solvent e.g. pyridine, quinoline or dimethylformamide. The coupling mixture may be heated with simultaneous addition of an organic solvent.
Patent GB-146572-A (GB)
Title: Improvements in pianofortes
IPC: G10C3/06
Filed: 1919-03-27
Abstract: 146,572. Fox, C. J. March 27, 1919. Pianoforte soundboards. - In pianofortes of the type in which the wrest-plank, fixed to the back of the piano and carrying the tuning-pins, has at its lower edge a fillet to which is secured the soundboard, the wrest-plank 2 is of less than usual depth and the soundboard 6 is extended under the frame so that a length of soundboard greater than usual is obtained between the bridge 7 and the pin s 5. Specifications 20400/92 and 13532/14 are referred to.
Patent GB-866334-A (GB)
Title: Improvements in the production of alkali metal carboxymethyl cellulose
IPC: C08B11/12
Filed: 1959-03-05
Abstract: An alkali metal salt of carboxymethyl cellulose is made by intimately mixing alkali cellulose and monochloracetic acid in an aqueous medium comprising a lower alkanol having 2-4 carbon atoms, extruding the resulting mass through a die so as to distribute the liquid component thoroughly and uniformly through the mass, breaking up the extruded column and allowing the resulting material to stand, with or without mild agitation, until the reaction has taken place.  The terms "alkali" and "alkali metal" are used to refer only to sodium and potassium, and the alkanol is preferably ethanol, but may be isopropanol or tert. butanol.  Preferably the aqueous medium comprises 0,4-1,2 parts of water, especially 0,60-0,83 parts, per part of cellulose, and 1,0-2,5 parts of the lower alkanol, especially 1,6-2,0 parts, per part of cellulose, and at least 75% of the water and at least 35% of the lower alkanol were present during the formation of the alkali cellulose (all parts are by weight). The ratio between the total free and combined caustic alkali and monochloracetic acid, should be between 0,88 : 1 and 1,10 : 1 where caustic soda is used, preferably from 0,95 : 1 to 1,0 : 1, and especially from 0,95 : 1 to 0,97 : 1.  Desirably, the extruded material is mildly agitated for at least 2 hours at 50 DEG -70 DEG C. The alkali cellulose may be made by intimately mixing comminuted cellulose, in an aqueous medium at most 3,7 times the weight of the cellulose, with caustic alkali, preferably caustic soda, extruding the resulting mixture under pressure, and allowing the extruded material, preferably after it has been disintegrated, to stand, with or without mild agitation, until the alkali cellulose is produced. Preferably, the comminuted cellulose has no particles larger than 10 mesh and the process is carried out at below 50 DEG C.  The aqueous medium may contain less than one part of water per part of cellulose, and may contain an alkanol having 2-4 carbon atoms, preferably ethanol.  The extruded alkali cellulose may be allowed to stand at least 10 minutes, preferably at least 15 minutes in the case of soda cellulose, after disintegration.  In each stage of the process, the reaction mass is desirably extruded through a die having a single opening of adjustable crosssectional area.  U.S.A. Specifications 2,505,125 and 2,517,577 are referred to.
Patent GB-1418993-A (GB)
Title: Diaphragm pump particularly for the generation of vacuum
IPC: F04B45/04
Filed: 1973-02-16
Abstract: 1418993 Diaphragm pumps for vacuum production E BECKER 16 Feb 1973 [8 March 1972] 7794/73 Heading F1N A diaphragm pump for vacuum production comprises a diaphragm 2 having a thickened relatively inflexible spherically convex control portion 8, a housing surface 4 facing the diaphragm and having a spherically concave control portion with a radius of curvature the same or slightly exceeding the curvature R2 of the convex portion 8, and a connecting rod 3 secured to the diaphragm and arranged cyclically to move the diaphragm to a position in which it makes substantially overall surface contact with the inner surface 4. The connecting rod 3 is oscillated by a crank drive  and is secured to the central portion of the dia-  phragm 2 by a metal member 26 vulcanized to a hub-shaped projection 9 of the diaphragm. The pivot axis of the connecting rod 3 is also the centre of curvature of the spherically convex central portion 8. To assist in preventing the diaphragm from bowing away from the surface 4, the crank-case K may be maintained at a pressure above atmospheric. Thus the crank-case K may be connected to an external source or be provided with a suction valve 12 and a valve 13 which allows the discharge of air when the pressure in the crankcase exceeds a certain value. The central portion of the surface 4 is either surrounded by a conical outer portion or, on the side of the surface 4 adjacent a delivery port 11, the conical surface is replaced by a convex surface (4'). A stiffening member (23) may be disposed within the central portion 8. The central diaphragm portion 8 may be harder than the surrounding annular portion 21. Two or more pumps as described above may be combined, Fig.6 (not shown) to form a two or multi-stage pump.
Patent GB-564450-A (GB)
Title: Improvements relating to handles for lawn mowers and analogous implements
IPC: A01D34/62
Filed: 1943-05-17
Abstract: 564,450. Handles. WILMOTBREEDEN, Ltd., and STEPHENSON, C. H. May 17, 1943, No. 7830. [Class 61 (i)] A stirrup handle attachment for the shafts a of lawn mowers &c. comprises a spindle b on which is rotatably mounted a sleeve g with fork extensions i for a cross-handle j, the spindle preferably being adjustably mounted on the shaft as by means of a fork c thereon pivoted on a bolt d and clamped in adjustable position by a wing nut f.
Patent GB-1402207-A (GB)
Title: Catalyst and its use in hydrocarbon cracking processes
IPC: F23K5/00
Filed: 1973-02-16
Abstract: 1402207 Hydrocarbon conversion catalyst SIEMENS AG 16 Feb 1973 [3 March 1972 14 Dec 1972] 7861/73 Heading B1E [Also in Divisions C5 and F1] A catalyst for conversion of fuel hydrocarbons comprises a refractory oxide support and an active component containing the oxides of lanthanium, cobalt, nickel and uranium. Specified support materials are alumina, magnesia, silica, zirconia, titania and mixtures thereof. Preferred supports are alpha-alumina and magnesia-alumina spinel. The support may be a porous unitary body in the form of a sintered tile having a plurality of parallel throughbores. The catalyst is formed by impregnation with compounds of-the metals and then thermally decomposing them to give the oxides. An organic or inorganic filler may be added during the preparation and then burnt out to form pores. The examples describe catalysts in which the support is a mixture of alpha-alumina and magnesia.
Patent GB-826630-A (GB)
Title: Improvements in or relating to steroids and the manufacture thereof
IPC: C07J75/00
Filed: 1957-03-11
Abstract: The invention comprises compounds having the general formulae <FORM:0826630/IV (b)/1> <FORM:0826630/IV (b)/2> wherein R is an alkylene radical containing not more than eight carbon atoms and the attaching oxygen to carbon bonds are separated by a chain of at least two and not more than three carbon atoms, R1 is an 11a -hydroxy, 11b -hydroxy or 11-keto group, R11 is a hydrogen atom or the acyl radical of a hydrocarbon carboxylic acid containing 1-12 carbon atoms inclusive and R111 is a phenyl radical or a lower alkyl radical containing 1-6 carbon atoms inclusive, and the preparation thereof treating a steroid compound having the formula <FORM:0826630/IV (b)/3> wherein R, R1 and R11 are as defined above with an alkyl or phenyl metal halide and hydrolysing the thus-produced metal steroid complex in an essentially neutral medium to obtain the corresponding 11-oxygenated 5a ,17a ,21-trihydroxy6 - alkyl - or 6 - phenylallopregnane - 3,20dione 3,20-bis (alkylene ketal), which is hydrolysed with an acid to obtain the corresponding 11 - oxygenated - 5a ,17a ,21 - trihydroxy - 6phenyl - or 6 - alkyl - allopregnane - 3,20dione.  As alkyl metal halide there may be used alkyl magnesium halides, alkyl and phenyl cadmium halides, and alkyl and phenyl calcium halides.  The ketal compound may be hydrolysed in aqueous-alcohol-acidic medium. Alternatively the metal steroid complex obtain in the first step and the hydroxyl groups may be hydrolysed simultaneously. Examples describe the preparation of 5a ,11b ,17a ,21 - tetrahydroxy - 6b  - methylallopregnane - 3,20 - dione 3,20 - bis - (ethylene ketal), the corresponding 11-keto compound, 5a ,11b ,17a ,21-tetrahydroxy6b  - methylallopregnane - 3,20 - dione, the corresponding 11-keto compound and similar compounds.ALSO:Compounds having the general formula <FORM:0826630/VI/1> wherein R1 is an 11b -hydroxy, 11a -hydroxy or 11-keto group, R11 is a hydrogen atom or the acyl radical of a hydrocarbon carboxylic acid containing 1-12 carbon atoms and R111 is a phenyl radical or lower alkyl radical containing 1-6 carbon atoms, and the 3,20-bis (alkylene ketals) thereof are employed orally in tablets, capsules, liquid suspensions or solutions, parentterally, topically as an ointment, bougie, lotion or jelly, in the form of drops or an ointment for the eye or ear, and in an aerosol vehicle for nasal use.  Additionally antibiotics, e.g. tetracycline, chlortetracycline, oxytetracycline, chloramphenicol, penicillin or novobiocin, sulpha drugs, aspirin and vitamins may be present.
Patent GB-662866-A (GB)
Title: Improvements in and relating to electric ranges and cooking utensils
IPC: A47J27/62
Filed: 1949-03-23
Abstract: 662,866. Thermal switches. BRITISH THOMSON-HOUSTON CO., Ltd. March 23, 1949. [March 26, 1948] No. 7925/49. Class 38 (v). [Also in Group XI] An electric range has a cooking top with hot-plates 19 on one of which stands a cooking vessel 11 with a switch 50 in the handle responsive to the temperature or other cooking condition of the contents of the vessel, the switch being connected through the handle of the vessel and a detachable cable 92 to a socket 90 on the range, so that the heating is switched through an electro-responsive relay control switch 130 at the desired cooking temperature or other cooking condition from a high to a low rate. The length of the cable is such that the vessel can be placed only on the nearest hotplate on the range to the socket on the back plate of the range. The thermally insulated handle 34 of the vessel is hollow and is sealed, its outer end having two pins 76 to receive the connecting cable. A housing 35 at the inner end of the handle is screwed to a metal plate 42 held against the side of the vessel by a flange 31a and a screw 46 so that the handle is removable. One end of a bimetallic strip 51 carrying a switch contact 66 is riveted at 52 to the plate 42, the contact being connected by leads 78 to a pin 76. The other contact 65 of the thermostatic switch is adjustably secured in a support 62 and is connected by a lead 79 to the other pin 76. The free end of the bimetallic strip 51 bears on a U-shaped steel spring 57, the lower end of which has a recess 58 engaged by an adjustable screw 54. The switch has a snap action, and when it is open, the lower end of strip 51 engages a projection 60 on the plate 42. A manually-controlled switch 24 on the rear splash-plate of the range controls the hot-plate 19, may be set to high, low and off positions and is connected to the plug 90 of the cable 92. The switch 24 is of the six position rotary type with load terminals 111 connected to an A.C. 3 wire supply. One pin of the plug 90 is connected directly to the neutral wire 101, the other pin of the plug being connected to a supply wire 103. The heating resistance of the hot-plate 19 is in two sections. When the switch 24 has been set to a high position and when the contents of the vessel 11 reach a certain temperature, the switch 50 closes and energises the winding of a relay 130 with contact-bridging elements 131, 132 so that the heating is then reduced to a low heating rate by connecting one section of the heater 19 between the neutral supply wire 101 and an outside conductor 103. The relay 130 is connected between the neutral supply conductor 101 and one terminal of the cable plug 90.
Patent GB-1024148-A (GB)
Title: Circuit arrangement for controlling the subscriber's meter and charge indicator in telecommunication systems, particularly telephone systems
IPC: H04M15/10
Filed: 1965-02-24
Abstract: 1,024,148. Automatic exchange systems. TELEFUNKEN PATENTVERWERTUNGSGESELLSCHAFT. Feb. 24, 1965 [March 3, 1964], No. 7951/65. Heading H4K. In a system in which some subscribers are provided with charge indicators operated by high-frequency pulses over the line, the normal exchange meters are provided with two windings of which one of high resistance is shortcuited in the case of subscribers without charge indicators. The metering pulses are supplied by way of a transistor amplifier, and, when the high-resistance meter winding is in circuit, a further transistor responds to a threshold potential and opens a rectifier gate to allow the passage of high-frequency pulses to the line.
Patent GB-113387-A (GB)
Title: Improvements in Flexible Coupling Discs for Universal Joints and the like.
IPC: F16D3/78
Filed: 1917-06-05
Abstract: 113,387. Hardy, E. J., and Hardy & Co., E. J. June 5, 1917. Universal joints.-Flexible coupling disks B are provided with blocks A of metal &c. in which are formed holes E for the usual studs on the shafts. The blocks A may be embedded centrally in the disk and may be held by stiffening-plates C.
Patent GB-916266-A (GB)
Title: Improvements in or relating to flexible containers in the form of bags, envelopes orthe like
Inventor: VEITCH STANLEY JOHN
IPC: B65D33/20
Filed: 1960-03-07
Abstract: 916,266. Making paper &c. bags. PROTECTIVE PACKAGING (DEVELOPMENTS) Ltd. Feb. 24, 1961 [March 7, 1960], No. 8053/60. Class 94(2). One edge of a bag 21, Fig. 3, is sealed by pressure-sensitive adhesive 26, which permits opening and resealing of the bag, and another edge is left open for filling and subsequently permanently sealed. In Fig. 1 a web e.g. of paper, regenerated cellulose, or polythene, is supplied with strips of adhesive on the lower and upper surfaces of its lower edge and with a tape 16 of pressure-sensitive adhesive on its upper edge. The lower edge is turned over at 11 for reinforcing and the upper edge of the tape is turned over to provide pull tabs 25 in the completed bag. Lengths 17 of the web are severed and each length is folded back upon itself to form a bag with top and bottom edges sealed by the adhesive 26, 12, Fig. 3, and an open side, with a flap 20, through which the bag contents may be filled. After filling, the flap 20 is folded over and heat sealed. To open the bag the tabs 25 are pulled and after removal of some of the contents the pressure sensitive adhesive 26 permits resealing by pressure. In a modification the pressure sensitive adhesive 32, Fig. 4, is applied directly to the turned over edge 30 of the web. Alternatively a single adhesive tape 33, Fig. 6 (not shown), on one side of the bag may be folded over on to the other side. In a modification superposed webs are used with tapes of pressure-sensitive adhesive secured to the upper edges of the two webs and to one another. Lengths of the double web are cut off and heat sealed along two of the remaining edges leaving the fourth edge open for filling. The superposed webs may be replaced by a single longitudinally folded web.
Patent GB-718916-A (GB)
Title: Improvements in and relating to the glueing or surface coating of wood or similar material with paper impregnated with a resinous condensation product
IPC: C09J7/21
Filed: 1952-03-31
Abstract: Paper is impregnated with a glue film of a condensation product obtained by condensing together phenol or a homologue, a sulphonic acid of phenol or a homologue and formaldehyde, then adding melamine and further formaldehyde and continuing the condensation. The product is used for the gluing or surface coating of wood (see Group VIII). In examples, partially sulphonated cresol is condensed with formaldehyde at 95 DEG C. and pH8, additional cresol and formaldehyde added and condensation continued at 95 DEG C. and pH7.8.  Then melamine and formaldehyde are added and condensation continued at 80 DEG C. and pH 6.5-7.0.  Specification 703,234 is referred to.
Patent GB-268953-A (GB)
Title: Improvements relating to chemical fire-extinguishers
IPC: A62C13/00
Filed: 1926-03-25
Abstract: 268,953. Riley, W. H. March 25, 1926. Extincteurs; portable pressure reservoirs.-An attachment to the dip pipe of a chemical fireextinguisher to prevent creeping of liquid at the discharge nozzle due to rises in temperature comprises a valve casing A secured by a fitting B to the dip pipe C above the normal liquid level in the extinguisher. A pin D retains in the casing A two balls E, F controlling a passage in the casing. Upon a rise in temperature air can escape from the space above the liquid past the balls E, F to the discharge nozzle, but in operation the balls E, F are respectively closed on their seats by liquid pressure in the dip pipe and gas pressure in the extinguisher.
Patent GB-609574-A (GB)
Title: A circle-cutting attachment for saws
IPC: B27B25/00
Filed: 1946-03-16
Abstract: 609,574. Sawing. WARING, F. E. March 16, 1946, No. 8248. [Class 145 (ii)] An attachment for saw benches, such as circular saws, band saws or jig-saws, to enable circles or arcs to be cut, comprises a support, shown as a block 8, carrying a pin 9, which may be adjustable for height, about which the work may be rotated, the block being held at varying distances from the saw blade by an arm 7 fixed to the machine table, with the pivot substantially level with the top face of the sawing table; the arm 7 may be carried by a pedestal 11 adjustable along the machine table and may be calibrated. In use, a square board to be made circular has the corners removed, and a hole is made at the centre to receive the pin 9. A supplementary attachment 13 for work of small diameters may be provided, which is adapted to be clamped to the block 8, extends back over the table and has a pivot pin 14 at its end. Strips 12 may be provided for supporting thin flexible work-pieces.
Patent GB-217665-A (GB)
Title: Improvements in or relating to electric switch or contact mechanism
IPC: H01H3/16
Filed: 1923-03-23
Abstract: 217,665. Giusti, T. March 23, 1923. Make - and - break switches, mechanical; advertising. - An intermittently - rotated make - and - break switch of general application but particularly applicable as a quick-acting switch for the motor of the electric sign apparatus described in Specification 198,048 comprises a rotary contact-drum a with co-operative brushes v, a driving member t itself driven by a finger on one of the contact wheels of the sign apparatus, and a cam k on the driven spindle co-operating with a spring plunger I to give a quick intermittent motion to the contact-drum. The four contacts b bridge the brushes and complete the circuit of a solenoid which breaka the circuit of the motor driving the contact wheels. The finger 2, Fig. 2, on the contact wheel 1 engages one of the four arms t and drives the drum into the contact position and, while contact is still maintained, within a range adjustable according to the relative portion of the cam upon the shaft, one of the teeth of the cam passes the dead-centre position in relation to the roller n on the spring-pressed plunger and a quick break results.