baber/WOPTO huggingface dataset:
Patent GB-1144122-A (GB)
Title: Improvements in or relating to adjustable microwave power splitters
Inventor: BREWSTER JOHN
IPC: H01P5/04
Filed: 1965-03-10
Abstract: 1,144,122. Directional couplers and circulators. ELECTRIC & MUSICAL INDUSTRIES Ltd. 10 March, 1966 [10 March, 1965], No. 10078/65. Heading H1W. A microwave power splitter comprises a short-slot waveguide directional coupler having an adjustable reactive impedance provided in the coupling section of the coupler whereby distribution of power between the output ports may be controlled. The impedance effects a differential phase-shift between the odd order TE 10 , and the even order TE 20  modes propagated in the coupling section. Thus, if a nominal 3 db. coupler is used and the differential phase shift is varied between + 90 and - 90 degrees, the power distribution varies between total coupling to one output port and total coupling to the other. In one embodiment, the variable impedance consists of a rod of ferrite arranged in the coupling slot parallel to the axes of the waveguides, the amount of (reciprocal) phase shift effected by the rod being determined by the magnitude and direction of an axial magnetic field. In a further embodiment, reactive elements in the form of varactor diodes are connected across the slot parallel to the direction of the electric microwave field. The embodiment shown uses ferrite elements 17, 18, 19, 20 arranged on either side of the slot 7 in regions where they are effective to shift the phase of the TE 10  mode but not the TE 20  mode. The phase shift is non-reciprocal and is controlled by opposite, reversible magnetic fields H 1 , H 2 . The device behaves as a circulator. All embodiments may be used as variable attenuators by providing one of the output ports with a dissipative terminal impedance.
Patent GB-1503501-A (GB)
Title: Process for preparing oxidatively-stable polymers
IPC: C08G85/00
Filed: 1974-03-06
Abstract: 1503501 Vinyl (3,5 - di - tert. - butyl - 4- hydroxyphenyl) propionate; 2 - (2<SP>1</SP>- hydroxy- 31 - acryloylaminomethyl - 5<SP>1</SP> - methylphenyl)- benzotriazole G SCOTT 5 March 1975 [6 March 1974 11 July 1974] 10086/74 and 30870/74 Heading C2C [Also in Division C3] Example 18 describes the preparation of vinyl(3,5 - di - t - butyl - 4 - hydroxyphenyl)- propionate by reacting vinyl acetate with 3,5- di-t-butyl-4-hydroxyphenyl propionic acid in the presence of mercuric acetate and concentrated sulphuric acid. Example 23 describes the preparation of 2- (21 - hydroxy - 31 - acryloylaminomethyl - 51- methylphenyl)-benzotriazole by reacting 2-(2<SP>1</SP>- hydroxy - 5<SP>1 </SP>- methylphenyl)benzotriazole with N-methylolacrylamide in concentrated sulphuric acid.
Patent GB-880339-A (GB)
Title: Improvements relating to mixing appliances
IPC: B01F15/00
Filed: 1960-03-22
Abstract: 880,339. Mixing appliances. SOC. D'ETUDES ET D'EXPLOITATION CHIMIE ET MECANIQUE MOULINEX. March 22, 1960 [March 25, 1959; Feb. 22, 1960], No. 10109/60. Class 86 A food and beverage comminuting and mixing machine has a shaft 7 revolving in a housing 1 which has an inverted bowl-shaped lower portion 2 forming a toroidal deflector and radial baffles 10 having slots 11 to admit passage of the rotor 8. The material is drawn upwards and expelled without turbulence in a conical envelope f having an apex semi-angle b of 50 degrees. The leading edges of the rotor blades are radial and are sharpened and co-operate with the edges of the slots 11 in comminuting the material; they are bent downward in an included semi-angle a of 70 degrees and may be twisted, see also Figs. 3, 13 and 14 (not shown) so that the rotor may maintain a speed of 20,000 r.p.m. without causing cavitation. The radial baffles 10 prevent rotation of the body of material; their bottom edges slope slightly upwards from the outer edge and they may be three in number to provide a three-point support for the apparatus. Their outer and inner edges may slope downwardly inwards; see Fig. 15 (not shown). The shaft housing may be attached to the mixer body by a screw thread 23, the lower edge of the shaft may be supported in a self-centering sintered bearing 19 and the upper end may have a coupling comprising lugs 29 which enter grooves 28 in a nylon bush 26, see also Figs 5 and 6 (not shown). Modified forms of coupling are described with reference to Figs. 7 to 12 (not shown).
Patent GB-541818-A (GB)
Title: Improvements in or relating to the use of producer gas in internal combustion engines
IPC: F02B75/02
Filed: 1940-06-11
Abstract: 541,818. Treatment of gas charges. MORISON, W. J., and EASTERN NATIONAL OMNIBUS CO., Ltd. June 11, 1940, No. 10180. [Class 7 (ii)] [Also in Group XXXIV] To prevent producer gas from acting deleteriously on the cylinder walls lubricating oil is added to the gas before it enters the cylinder. Lubricating oil from a container 14 passes through a sight feed apparatus 16 to a pipe conveying the gas to the engine the suction of which induces the lubri - cant. A valve 15 regulates the supply passage of the apparatus 16. Specification 541,533, [Group XII], is referred to.
Patent GB-1385934-A (GB)
Title: Monoazo disperse dyes
IPC: D06P5/28
Filed: 1972-03-04
Abstract: 1385934 Aniline derivatives YORKSHIRE CHEMICALS Ltd 27 Feb 1973 [4 March 1972] 10224/72 Heading C2C [Also in Division C4] N - # - cyanoethyl - N - # - phenylpropylaniline is prepared by dissolving Na in aniline adding α-methylstyrene and refluxing to give N-#- phenylpropyl-aniline (I) which is treated with excess acrylonitrile in the presence of copper acetate and hydroquinone.  N - # - acetoxyethyl - N - # - phenylpropylaniline is prepared by condensing (I) with ethylene oxide to give N-#-hydroxyethyl-N-#- phenylpropylaniline which is acetylated with acetic anhydride in acetic acid.
Patent GB-834870-A (GB)
Title: Milling cutter for use in oil wells
Inventor: CHADDERDON JACK
IPC: E21B10/26
Filed: 1958-03-31
Abstract: 834,870. Abrasion tools. SERVCO MANUFACTURING CORPORATION. March 31, 1958, No. 10225/58. Class 60. An abrasive cutter for use in oil wells comprises a plurality of cutting elements 10, Fig. 3, embedded in and bonded to a matrix 9 covering the leading side face and the radially extending edge of a longitudinally extending core blade 5 secured to and projecting from a body structure 1, Fig. 1, the blade being divided transversely into a plurality of segments 8 and capable of wearing away when subjected to attrition by operation on the annular end face of a pipe or well casing so as to present succeeding segments to the pipe. A plurality of blades, each of which is divided into segments 8 by slits 7, may be secured to arms 2 adjustably-pivoted to spindles 3 disposed transversely to the axis of the body 1. The leading face, which depends on the direction of rotation, and the radially extending edge of the core have a matrix consisting of an alloy of copper, zinc or nickel-chromium-boron, in which are embedded the elements 9 each comprising cobalt-bonded grains of carbide such as tungsten, molybdenum, chromium, vanadium, zirconium, titanium, uranium tanalium or niobium, the elements being from 3/64 inch to  inch in size. In another embodiment, the blades 12, Fig. 4, which may be of steel or steel alloy are secured to a cylindrical body 11 and some have spiral extensions 13 of reduced radial width which serve to guide the tool in the pipe. In a further embodiment, the blades 17, Fig. 5, extend radially inwards from a tubular body 16 which has a plurality of perforations filled with a matrix and cemented carbide fragments 20 to abrade any portions which may project from the wall of the pipe. In operation, as the blades wear and the pipe 14, Fig. 4, moves in the direction D relative to the tool, the slits, which may be wholly or partly filled with matrix, permit the worn portions of the segments to fall away. A window may be cut in the side of a pipe or well casing by using the embodiment shown in Fig. 4, without the spirals, in co-operation with a whipstock.
Patent GB-551921-A (GB)
Title: Manufacture of fluorene derivatives
IPC: C07C49/665
Filed: 1941-08-12
Abstract: 551,921. Dibenzfluorenone. TODD, A. R., SWAIN, G., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. Aug. 12, 1941, No. 10237. [Class 2 (iii)] 1:2:5:6-Dibenzfluorenone is obtained by causing a N-nitroso-acyl-2-naphthylamine to react at not above 40 ‹C. with an aliphatic ester of 2-naphthoic acid which is liquid at the reaction temperature, whereby the corresponding aliphatic ester of 1:2<SP>1</SP>-dinaphthyl-2-carboxylic acid is obtained, which is hydrolysel and heated in an acid medium to bring about ring closure. 1:2:5:6-Dibenzfluorene is obtained by reduction. In examples the amyl ester of 1:2<SP>1</SP>-dinaphthyl-2-carboxylic acid is prepared from N-nitrosoacet-2-naphthalide and amyl-2- naphthoate, hydrolysed with potassium hydroxide and heated in solution in acetic acid with sulphuric acid.
Patent GB-288574-A (GB)
Title: Thread winding machine
IPC: D02G3/36
Filed: 1928-04-04
Abstract: 288,574. Ensign-Bickford Co., (Assignees of Ellsworth, H. E.). April 12, 1927, [Convention date]. Tension arrangements; spindle-apparatus; stopmotions.-In a thread-winding machine each thread S, Fig. 1, to tensioned by an element adapted to be moved by centrifugal force radially outwardly into engagement therewith. Each thread passes from a bobbin G through the tension device N, Fig. 3, and through a pig-tail guide J to the work. The plate members E, H, L, rotate as a unit and in so doing causes balls n<9> in the devices N to move outwardly to press the threads against the concave surfaces n<8>, whereby the threads are tensioned and the guides J lifted. On breakage of any thread its guide J drops and the plunger K contacts with the control lever P to stop the machine.
Patent GB-1207107-A (GB)
Title: A method of manufacturing sintered articles from metal oxides
Inventor: BOULINIER CLAUDE
IPC: C04B35/01
Filed: 1969-02-26
Abstract: 1,207,107. Ceramics. COMMISSARIAT A L'ENERGIE ATOMIQUE. 26 Feb., 1969 [12 March, 1968], No. 10277/69. Heading C1J. Sintered articles containing the phases Fe 2 O 3 -Cr 2 O 3  and FeCrNiO 4  are made by the steps of: wet grinding a mixture of 72.5 wt. per cent Fe 2 O 3 , 18À5 wt. per cent Cr 2 O 3  and 9 wt. per cent NiO; drying and screening the ground powder to pass a 40 mesh (B.S.) sieve; heating the sieved powder at 900-1200‹ C.; grinding the heated powder to an average particle size of less than 2 microns; coating the ground powder with a mixture-containing an aqueous synthetic glue and an emulsion of paraffin, stearic acid and ethanolamine in demineralized water; drying and screening the powder, which contains about 4 wt. per cent of the dried binder, to provide a fraction passing a 40 mesh screen and retained on a 100 mesh screen; cold pressing the screened powder at 0.5 to 3 metric tons per square centimetre after adjusting its moisture content to 0.3 to 1.5 wt. per cent; drying the compressed article at below 100‹ C. for at least 24 hours; expelling the binder by slow heating; and sintering the articles at 1250-1400‹ C. The sintered articles are finally machined by grinding.
Patent GB-662877-A (GB)
Title: Synthetic polymers from hydroxy amino acids
IPC: C08G63/685
Filed: 1949-04-19
Abstract: Synthetic polycondensates which may be linear and thermoplastic or cross-linked and thermosetting according to the length of time the reaction is carried on, are obtained by heating, preferably in inert atmosphere, an amino acid of the type <FORM:0662877/IV (a)/1> where R is H or a beta-hydroxyethyl group and n is at least 5 where R=H and 10 where R is a beta-hydroxyethyl group.  The reaction may be carried out in presence of catalysts, e.g. phosphoric acid and reducing agents, e.g. hydroquinone.  The amino acids may be copolymerized with other polyamide forming monomers, e.g. other aminoacids, or with hydroxy acids or dibasic acids.  In examples: (1) 11-N-ethanol-amino-undecanoic acid prepared from the brominated acid and ethanolamine (see Group IV (b)) is heated to melting point under high vacuum and in an atmosphere of nitrogen.  After 50 minutes heating at 150 DEG  C. a sticky grey resin was obtained, soluble in benzyl alcohol and partially in boiling alcohol.  On heating for 80 minutes a soft syrupy resin was obtained and at the end of 130 minutes a gel was obtained. Dehydration after gelling may be continued to give a firmer gel. The 11-N-ethanol-amino-undecanoic acid may be copolymerized with (a) adipic acid, (b) 11-amino-undecanoic acid, (c) lactic acid. (2) 11-N-diethanol-amino-undecanoic acid is similarly condensed to a resin of m.p. 62 DEG  C. and may be co-condensed with 11-amino-undecanoic acid.  The resins obtained may be employed in the manufacture of moulding powders, coating compositions, adhesives. p The Specification as open to inspection under Sect. 91 included amino acids of the formula <FORM:0662877/IV (a)/2> where R11 is any bivalent radical and R, R1, R111 are H or monovalent radicals.  This subject-matter does not appear in the Specification as accepted.ALSO:Hydroxy amino acids of formula HO-CH2-CH2-NR-(CH2)n-COOH where R=H or a beta-hydroxyethyl group are obtained by reacting halogenated acids of the type X-(CH2)n-COOH (X being halogen) with mono- or di-ethanolamine.  11 - N - ethanolamine-amino-undecanoic acid is prepared by heating 1 mol. 11-bromo-undecanoic acid with 4.5 mols. ethanolamine, a clear liquid which sets to a solid mass being obtained, which is purified by washing with chloroform, dissolving in water and crystallizing in the cold to give a product of m.p. 134 DEG  C. 11-N-diethanol-amino-undecanoic acid is prepared similarly.
Patent GB-123471-A (GB)
Title: Improvements in and relating to Machinery for Cutting or Dividing Textile Fabrics, Paper, and the like.
Inventor: COOPER EDWARD WARD
IPC: D06H7/04
Filed: 1918-06-24
Abstract: 123,471. Cooper, E. W. June 24, 1918. Vertical-cutter type for cutting sheet material in direction of feed; cutting warpless fabrics.- Relates to a machine of the type comprising cutters working in a grooved roller for longitudinally cutting fabrics &c. and particularly fabrics woven with warpless intervals. and consists of (1) improved means for guiding the material so that the lines of severance, e.g. the warpless portions, pass over the grooves, (2) means for securing a waved or serrated cut, and (3) means for varying the angle presented to the material by fixed blades, where used. The material A is cut as it passes over a grooved roller C or its equivalent by stationary knives D or loosely mounted disk cutters and the grooves in the roller C correspond with the required lines of severance. The material is guided to the cutting apparatus by a guide-bar B provided with rotatable or other collars B<1> with rounded edges adapted to bear on the warpless portion or required line of severance of the material. Similarly spaced star-wheels H may also be employed to engage the warpless portion and further assist in guiding the material. From the cutting-apparatus the material passes over a roller E and bar F to the winding apparatus. The roller E may be driven and serve as a feed-roller, and an additional bar J may be employed to increase the overlap of the roller C by the material. The cutters D are carried by arms pivotally adjustable. on a bar D<1> to permit of varying the inclination of cutting-edges. The bar D<1> may be reciprocated laterally of the material to secure a waved or serrated cut, or where disk cutters are used, their cutting-edges may be so disposed as to secure the desired shape of cut. The rollers C and E are preferably provided with roughened peripheries.
Patent GB-1425508-A (GB)
Title: Heating system for single dwelling houses
IPC: F24D3/08
Filed: 1973-03-02
Abstract: 1425508 District heating; water heating KH BROSENIUS 2 March 1973 10382/73 Headings F4U and F4A A heating system for a small group of houses 2, i.e. between 4 and 10, comprises a central heating source 1 capable of being heated by oil-burners 4a, 4b or electric heating elements 5; storage containers 11 disposed within the houses for receiving hot water from the source 1; a piping system which includes conduits 9, 10, 12, 13 for piping hot water around the system and a continuously-operating pump 8. The containers 11 are formed of sheet-iron 14 surrounded by thermal insulation 16, and include electric water heating elements 27-29, an indirect domestic water heat exchange element 15 and conduits 21, 22 connecting the hot water in the containers to the house central heating system. Each house heating system comprises a pump 18, radiators 17, a shunt pipe 20 and a shunt valve 19 for mixing hot water going to the radiators with cold water coming from the radiators. The shunt valve 19 may be thermostatically operated. Each container 11 is also provided with a by-pass pipe 45, so that in the event of power failure hot water from the central source may be forced through the radiators. The heating system is also provided with an expansion vessel 63 having an overflow 64; the vessel 63 being fitted in one of the houses 2. A pressure release device which functions in the event of over-heating of the heating source 1 is provided in the form of either an expansion pipe 67 adjacent the flue 44, or an outlet 69 having a safety valve 70.
Patent GB-1466050-A (GB)
Title: Silver halide photographic materials
IPC: G03C1/28
Filed: 1975-03-12
Abstract: 1466050 Silver halide material FUJI PHOTO FILM CO Ltd 12 March 1975 [12 March 1974] 10387/75 Heading G2C A light-sensitive silver halide photographic material comprises a support having thereon a silver halide emulsion layer in which at least 50% by number of the silver halide grains have a (100) crystal habit, at least one of the photographic layers of the material comprises a compound of Formula 1. in which R<SP>1</SP> represents an optionally substituted aliphatic hydrocarbon group or an aryl group, and each of R<SP>2</SP> and R<SP>3</SP> represents a hydrogen atom or an aliphatic or aryl group or R<SP>2</SP> and R<SP>3</SP> together represent a divalent aliphatic group which completes a 5- or 6-membered ring, and at least one of the polymethine dyes represented by the general Formulae II and III. wherein each of Z<SP>1</SP> and Z<SP>2</SP> represents a group of atoms necessary to complete an optionally substituted benzothiazole, naphthothiazole, benzoselenazole or naphthoselenazole nucleus; A represents an alkyl group; each of R<SP>4</SP> and R<SP>5</SP> represents an aliphatic group; x # represents an anion; and n is 0 or 1, n being 0 when an internal betaine-type salt is formed; wherein Z<SP>3</SP> represents the atoms necessary to complete an optionally substituted oxazoline, oxazole, benzoxazole, naphthoxazole, thiazoline, thiazole, benzothiazole, naphthothiazole, benzoselenazole, pyrroline, tetrazole, pyridine or quinoline nucleus, Q represents the atoms necessary to complete a 2-thioxazolidinedione, 2-thiohydentoin or rhodanine nucleus, R<SP>6</SP> represents an aliphatic group L represents an optionally substituted methine group and each of p and q is 0 or 1. The sensitivity to low illuminance for long exposure times is improved. The silver halide grains may have an average grain size from 0À04Á to 2Á, especially 0À1Á to 0À7Á. In Examples (i) an emulsion containing 80% of silver halide crystals of (100) habit is prepared by mixing solutions of gelatin, silver nitrate and potassium bromide and iodide while adjusting the p Ag to 8À8 during the formation of the silver grains, washing, ripening and adding chlorauric acid and sodium thiosulphate sensitizers. A comparison emulsion prepared at p Ag 9À5 has 80% of the grains with the (iii) crystal habit. To the emulsions compounds of types I, II and III are added and tests carried out with exposures of 10<SP>-4</SP> and 10 seconds.
Patent GB-227335-A (GB)
Title: Improvements in combination desks and chairs
IPC: A47B39/00
Filed: 1924-04-28
Abstract: 227,335. Kynch, M. W. April 28, 1924. Desks combined with seats.-A track or rail 13 is mounted on supports 17 parallel with a desk A, and on this runs a roller 15 carried in a forked frame 12 projecting over each side of the track and secured to a chair B mounted on castors 10, so that the chair may slide parallel to the length of the desk. The distance of the track 13 from the desk is adjusted by extensible plates 19 fixed at one end to the desk and track respectively and adjustably connected together by a thumb screw and slot 22.
Patent GB-623246-A (GB)
Title: Opening device for grab-buckets
IPC: B66C3/10
Filed: 1947-04-18
Abstract: 623,246. Grab-buckets. SOC. FRANCAISE DE CONSTRUCTION DE BENNES AUTOMATIQUES. April 18, 1947, No. 10425. Convention date, April 1, 1943. [Class 78 (iv)] In a single-chain grab bucket the opening crown 2 which is suspended from the jib of a crane, is provided with three pivoted latches 19 for engaging a slider 12 on the bucket head 6, and the slider has a limited movement relatively to the head, which movement controls the pawls 8 on the head and allows them to turn into position to be supported by a disc 24 mounted on the actuating chain 3. A sleeve 22 mounted on the crown holds the latches 19 in the position shown in Fig. 3a when the bucket is not attached to the crown. When a full bucket is hoisted by the chain 3, its head 6 lifts the sleeve 22 whereupon the latches 19 fall into the position shown in Fig. 4a beneath the lip of the slider 12. The chain is now slackened until the disc 24 Fig. 6a, rests on the ledge 25 at the bottom of the slider 12. On raising the chain the disc 24, Fig. 7a, engages the pawls 8 and raises the slider until it abuts against'the crown 2. During this movement the sleeve 22 retracts the latches 19 and the bucket is free to descend. When the bucket rests on the load, the chain is slackened, the slider 12 drops and retracts the pawls 8 leaving the interior of the slider free for the passage of the disc 24 when hoisting is resumed. Longitudinal passages are provided between the parts to enable dirt &c. to pass away.
Patent GB-1090038-A (GB)
Title: Improvements in or relating to vehicles for picking up crop or like material
IPC: B60P1/48
Filed: 1965-03-11
Abstract: 1,090,038. Agricultural pick-up trailers. JOSEF DECHENTREITER MASCHINENFABRIK G.m.b.H. March 11, 1965 [March 16, 1964], No. 10457/65. Heading B8E. An agricultural trailer has a tined pick-up mechanism 5 feeding material to a feed device, comprising fingers 17 rotated about a shaft 16 in a path R, and thence to a loading space on the floor of which is an endless conveyer having slats 78 and drivable in either direction. A conveyer comprising slats 57 on chains 56 loosens the material for unloading and feeds it via the fingers 17 rotated in a discharging direction to a discharge belt conveyer 39 extending transversely of the trailer. The pick-up mechanism 5 and conveyer 39 are mounted on pivoted arms 23, 25 fixable by an arm 33 in the position shown in which material is picked-up, fed to the loading space and compacted therein by the floor conveyer moving towards the rear of the trailer. The pick-up mechanism can be pivoted forwards on its arms 23, 25 and fixed in an inoperative position by-the pin 35 of the arm 33 entering a hole 90 in the arm 25. In this inoperative position the loaded material can be discharged through the front of the trailer by reversing the conveyer on the floor of the loading space to move towards the front, operating the conveyer 56, 57 to loosen the material and feed it via the fingers 17, rotating opposite the direction R, to the discharge conveyer 39.