baber/WOPTO huggingface dataset:
Patent GB-743580-A (GB)
Title: An improved apparatus for testing the balance of rotating bodies
Inventor: CHILTON JOHN
IPC: G01M1/22
Filed: 1952-06-03
Abstract: 743.580. Electric balancing machines. AVERY, Ltd. W. & T. June 1, 1953 [June 3. 1952], No. 13911/53. Class 40(1) The invention relates to balancing machines, e.g. as disclosed in Specification 642,916, in which a rotating body a, Fig. 1, is supported in bearings b, associated with electromagnetic pick-ups f, f<SP>1</SP> each connected in an electrical network NL, NR, whereby the pick-up outputs may be combined and compared in a phase sensitive detector, e.g. a watt-meter j with the output of a selected phase of a two phase alternator h driven synchronously with the rotor a. To adjust the networks NL, NR so that an out-of-balance measurement in one bearing plane may be unaffected by out-of-balance in the other plane, a dynamically balanced rotor is normally required. This requirement is obviated according to the invention. An unbalanced rotor is used and artificially "balanced", for each bearing plane in turn, before the initial network adjustments, by injecting resultant e.m.f's from the two phases of the alternator into the pick ups to nullify the effect thereon of the unbalance of the rotor. The circuit arrangements shown above the line A-A correspond to and function as described in Specification 642,916. The two quadrature phases V, H of the alternator are fed through respective phase shifters PV, PH, amplifiers AV, AH and transformers TV, TH to respective potentiometers R2-R4 and R1-R3. The centre points of R1, R2 are connected together and the wipers thereof are series connected with the pick-up f so that by adjustment of the potentiometers a variable voltage in phase or antiphase with either of the V. H phase outputs or a combination thereof may be injected in series with the output, of pick-up f. The potentiometers R3 R4 permit similar voltages to he injected in series with the output of pick-up f. The phase shifters, amplifiers and output transformers feeding the potentiometers R1-R4 are disclosed in detail in Fig. 2 (not shown).
Patent GB-188692-A (GB)
Title: A process for producing coloured photographs on paper or the like
IPC: G03C7/46
Filed: 1921-05-19
Abstract: 188,692. Lage, E. A. May 19, 1921. Colour photography.-In a process for producing colour prints on paper or the like, in which three colour-value negatives are successively copied on a single base which is re-sensitized for each successive image, the yellow partial image is produced as a chrome yellow image, the blue partial image is produced as an iron-blue image, and the red partial image is produced by a chromate process, the yellow image being maintained invisible until the blue and red partial images have been printed. A bichromate bath which is used to produce the yellow image is also utilized to sensitize the paper for printing the red image. An ordinary black gaslight or similar print is produced from the yellow negative, well rinsed, and bleached in a bath containing lead nitrate, potassium ferricyanide, and nitric acid. The print is washed, dried, and moistened with a solution containing ferric ammonium citrate and potassium ferricyanide. It is then printed fully under the blue negative, washed, dried quickly, and coated with a 3 per cent solution of potassium bichromate, which is allowed to dry. This develops the yellow partial image, but, owing to the yellow colour of the bichromate, maintains this image invisible, and also sensitizes the surface for printing from the red partial negative. The printing from this negative is continued until the image is just visible in the high lights; the print is then washed and dried and the red image is produced thereon by treatment with red pigment. The print is finally fixed in sodium hyposulphite, washed, and dried.
Patent GB-771810-A (GB)
Title: Improvements in or relating to solutions of acrylonitrile polymers
Inventor: KOWOLIK ERNEST JAN
IPC: C08J3/09
Filed: 1954-05-13
Abstract: Polymers containing a major proportion of acrylonitrile in the molecule are dissolved in the liquid mixture obtainable by heating cyanogen bromide with N : N-dimethylformamide and fractionally distilling the products, and having a boiling-point of 96 DEG  C. under a pressure of 14 mm. of mercury.  Polymers specified are polyacrylonitrile and copolymers with vinyl acetate, beta-morpholino-ethyl vinyl ether, styrene, methyl and phenyl acrylates, methacrylonitrile, vinyl and vinylidene chlorides, 2-vinyl pyridine and 2-methyl-5-vinyl pyridine.  Other compounds having a solvent, swelling or softening action on polyacrylonitrile may be present such as dimethyl formamide, sulpholane, butyroloactone, valerolactone, maleic acid and anhydride, succinic and glutaric anhydrides, nitromethane, nitroethanol, ethylene carbonate, ethylene cyanhydrin, m- and p-nitrophenols, resorcinol and water.  The solutions may be used in the production of films, fibres and coatings.  The Provisional Specification describes also the use as solvents for acrylonitrile polymers of halo- and cyano-amides of lower aliphatic acids, e.g. dimethyl and diethyl monochloroformamides and monochloracetamides.  Specifications 636,476, 711,344 and 712,984 are referred to.ALSO:Dimethyl formamide is heated, e.g. to 80-100 DEG C., with cyanogen bromide and the reaction products fractionally distilled to yield, as the main fraction, a yellow liquid boiling at 96 DEG  C. under 14 mm. pressure which has a nitrogen content of about 14.8 per cent and a bromine content of about 21.5 per cent.  It is stated in the Provisional Specification that the product may be an azeotropic mixture of N : N-dimethyl bromoformamide and N : N-dimethyl cyanoformamide.  The Provisional Specification describes also the preparation of monoalkylcyanoacetamides, e.g. methyl cyanoacetamide, by the reaction of the corresponding amine, e.g. methylamine, with ethyl cyanoacetate.  Specification 636,476, 711,344 and 712,984, [all in Group IV (a)], are referred to.
Patent GB-140781-A (GB)
Abstract: 140,781. Hager, F. A. April 11, 1918, [Convention date]. Compositions containing vulcanized oils. - A composition for filling tyres consists of soya bean oil, 24 1b. ; chloride of sulphur, 6 1b. ; oxide of magnesia, 17¢ oz.; and a colouring-matter (Venetian red) 3 oz. The ingredients are mixed and poured into moulds, and, when hard, the composition is placed in the tyre casing.
Patent GB-317353-A (GB)
Title: Improvements in and relating to exhaust silencers, particularly for motors of power vehicles
IPC: F01N1/08
Filed: 1928-05-14
Abstract: 317,353. Werner, K. May 14, 1928. Exhaust silencers. - The exhaust pipe is divided bv one or more partition walls into two or more chambers which lie one behind the other in the axial direction of the exhaust pipe or are beside one another, which chambers are connected together in series or parallel by tubular connection which are arranged at such a distance from the transverse partition walls that gas or air cushions are formed between them and the partition walls. A partition B, Fig. 1, divides the exhaust pipe A into two chambers which are connected by tubular members C, D and a pipe H. Air or gas cushions are formed between each of the members C, D and the partition B. The pipe G may contain further baffling means e.g. a semi-circular partition F and a baffle plate E. The pipe G is placed not immediately under the pipe A but to one side thereof as in Fig. 2. The connecting pipe may be at right angles to the exhaust pipe and may be employed on a motor bicycle to heat the footrests. In a further modification, Figs. 3 - - 6, a tubular member K is inserted in the exhaust pipe and is subdivided bv partitions L<1>, L<2> into four sector-shaped chambers S', S<2>, S<3>, S<4>, connected in series by means of tubular members R<1>, R<2>, R<3>. The chamber S<1> is open to one side of the exhaust pipe and the chamber S<4> to the other side, while the two remaining chambers are closed laterally by transverse walls O<1>, O<2>. The exhaust gases take the course indicated by the arrows in Figs. 3, 4, entering first the chamber S<1> and leaving by the chamber S<4>. In a further modification the member K is subdivided into three chambers the walls of which are at 120‹. In a still further modification the member K is again divided into four chambers which are connected partly in parallel and partly in series or, if desired, only in parallel by means of tubular connections. The number of chambers into which the exhaust pipe is divided can be varied, and several divided tubular members could be inserted in the exhaust pipe.
Patent GB-541317-A (GB)
Title: Improvements in or relating to blowpipe apparatus
IPC: F23D14/56
Filed: 1940-09-12
Abstract: 541,317. Annealing. SHORTER PROCESS CO., Ltd., and SHORTER, A. E. Sept. 12 1940, No. 14138. [Class 72] [Also in Group XI] A blowpipe head suitable for the flame treatment of extended surfaces consists of an upper block 10 fitted with a nipple 17 connected to a supply pipe for oxygen and acetylene or other combustible mixture, side and end walls 12-15, a lower, block 11, and an, apertured transverse partition 18, the lower block 11 being formed with a number of equi-distant parallel slitshaped orifices 22 arranged at an angle to the direction of traverse. The block 11 may be formed by a number of elements 11' having inclined abutting surfaces recessed to form convergent gas passages 21 leading to the orifices 22. The elements 11<SP>1</SP> are welded or brazed to the walls and to one another. The blowpipe head may be formed with passages for cooling water and may be formed with a passage 24 discharging quenching fluid through orifices 28 preferably inclined away from the burner orifices. A ledge 29, groove, or ridge prevents the quenching liquid spreading to the gas orifices 22. When treating large surfaces two or more heads may be mounted side by side with the orifices adjacent the abutting edges the same distance apart as the distance between the other pairs of adjacent orifices.
Patent GB-108240-A (GB)
Title: An Improved Crutch.
Inventor: PLUMB JAMES PETER
IPC: A61H3/02
Filed: 1916-10-05
Abstract: 108,240. Plumb, J. P. Oct. 5, 1916. Folding seats. - A crutch which is convertible into a seat has the parts a carrying the arm support e pivoted to the body parts b by a bolt c, side clips g being provided to lock the parts for use as a crutch. For use as a seat, the parts are opened as shown in Fig. 3 and a seat of webbing or the like is carried between bolts d. The seat may have hooked ends engaging the bolts, and a box may be provided to receive it when not in use; or it may be carried on a spring roller mounted in place of one of the bolts d.
Patent GB-475507-A (GB)
Title: Process for the manufacture of pyrimidine compounds
Filed: 1936-05-19
Abstract: 4 - Amino - 5 - hydroxyalkylpyrimidines are obtained by the action of nitrous acid on 4 - amino - 5 - aminoalkylpyrimidines or their substitution products.  Esters of 4-amino-5-hydroxyalkylpyrimidines may be obtained (a) by esterifying these compounds with an acid, an acid anhydride or an acid halide, such as a halide of phosphorus or a thionyl or sulphuryl halide, or (b) by treating the 4-amino-5-aminoalkylpyrimidines with a nitrite in the presence of an excess of an acid, e.g. a hydrohalic acid.  In the examples, (1) an aqueous solution of 2 - methyl - 4 - amino - 5 - aminomethylpyrimidine hydrochloride is treated with sodium nitrite to yield 2 - methyl - 4 - amino - 5 - hydroxymethylpyrimidine, which may then be treated with hydrobromic acid in acetic acid solution to yield 2 - methyl - 4 - amino - 5 - bromomethylpyrimidine; alternatively, the 2-methyl-4 - amino - 5 - hydroxymethylpyrimidine may be converted into its benzenesulphonic ester by heating it with benzene sulphochloride; (2) 2 - methyl - 4 - amino - 5 - aminomethylpyrimidine hydrochloride in suspension in hydrochloric acid is treated with sodium nitrite to yield 2 - methyl - 4 - amino - 5 - chloromethylpyrimidine; the same compound is obtainable by reaction of 2-methyl-4-amino-5-hydroxymethylpyrimidine with phosphorus pentachloride; (3) 2 : 4 - diamino - 5 - aminoethyl-6-methylpyrimidine in acetic acid solution is treated with sodium nitrite to yield 2 : 4-diamino - 5 - acetoxyethyl - 6 - methylpyrimidine; (4) 2 - phenyl - 4 - amino - 5 - aminomethylpyrimidine dihydrochloride is treated in aqueous solution with sodium nitrite to yield 2 - phenyl - 4 - amino - 5 - hydroxymethyl pyrimidine; the picrate of this product, treated in acetic acid solution with hydrogen bromide, yields 2 - phenyl - 4 - amino - 5 - bromomethylpyrimidine; (5) 2 - methyl - 4 - methylamino - 5 - aminomethylpyrimidine hydrochloride (Specification 473,193) is treated in aqueous solution with sodium nitrite to yield 2-methyl-4 - methylamino - 5 - hydroxymethylpyrimidine, which is treated with an acetic acid solution of hydrogen chloride to yield 2-methyl-4-methylamino-5-chloromethylpyrimidine.  2 : 4 - Diamino - 5 - aminoethyl - 6 - methylpyrimidine, used in example 3, is prepared by treating acetobutyrolactone with urea in the presence of sodium ethylate to yield 2 : 4-dihydroxy - 5 - hydroxyethyl - 6 - methylpyrimidine, treating the latter with phosphorus oxychloride to yield 2 : 4-dichloro-5-chlorethyl-6-methylpyrimidine, which is then heated with alcoholic ammonia to replace the chlorine atoms by amino groups.  2 - Phenyl - 4 - amino - 5 - aminomethylpyrimidine, used in example 4, is prepared by treating benzamidine with formylsuccinic acid ester in the presence of sodium ethylate to yield 2 - phenyl - 4 - hydroxypyrimidine - 5 - acetic ester, converting the latter into the 4-chloro compound, and treating the chloro compound with alcoholic ammonia to yield 2-phenyl-4-aminopyrimidine-5-acetamide, which is then subjected to the Hofmann degradation.
Patent GB-1211405-A (GB)
Title: Process for the production of polyurethane or polyurea foam plastics
Inventor: GROEGLER GERHARD
IPC: C08G18/22
Filed: 1968-03-25
Abstract: 1,211,405. Laminates comprising foils of polyurethane foam. FARBENFABRIKEN BAYER A.G. 25 March, 1968 [25 March, 1967], No. 14298/68. Heading B5N. [Also in Division C3] Laminates may be prepared by bonding foils of a polyurethane foam prepared by reacting a branched polypropylene glycol polyether, propane-sultone, an organosiloxane-alkylene oxide block polymer, tin ethyl hexoate, water and an isomeric mixture of 80% 2,4- and 20% 2,6-toluene diisocyanate to nettle cloth in a commercial flame backing plant or to PVC foil in a commercial high-frequency welding apparatus.
Patent GB-899995-A (GB)
Title: Processes for the production of steroid derivatives, and the derivatives thus produced
IPC: C07J31/00
Filed: 1960-04-22
Abstract: The invention comprises the potassium salt of prednisolone 21-p-sulphobenzoate, the sodium salt of hexadecadrol 21-m-sulphobenzoate, and processes for the preparation of steroid esters in which a 20-keto-21-hydroxy-steroid is converted into a corresponding 21-sulphonate and the latter is reacted in solution in a polar solvent with an alkali metal salt of a carboxylic acid to yield the ester at the 21-position of said steroid.  As polar solvents there may be used an N,N-dialkyl acylamide (e.g. dimethylformamide) or dimethyl sulphoxide.  Specifications 826,953, 853,402 and 899,996 are referred to.
Patent GB-1108442-A (GB)
Title: A water sprinkler
Inventor: HAGEMEISTER HANS
IPC: B05B3/02
Filed: 1965-04-05
Abstract: 1,108,442. Spray-producers. ARMATURENWERK HERZBERG VEB. 5 April, 1965. No. 14323/65. Heading B2F. In a water sprinkler of the type comprising an oscillatable spray pipe 2 having a depending part 3 pivotally mounted in an upright stationary tubular base 1, the part 3 has an enlarged base portion 3A housed within a correspondingly shaped bore of the tube 1. The base portion 3A incorporates a surface 5 in contact with a similar surface within the bore of the tube 1 and a vertical cylindrical surface 6 in which is let a metal band for preventing the base 3A from widening under the action of water pressure and thus to prevent any jamming on the surface 5. The surface 6 also incorporates a sealing ring 8. Oscillatory movement of the spray pipe derives from the provision of a water deflector 18 which is capable of limited movement about the vertical axis of the sprinkler under the bias of a torsion spring 9. The spring is made of a plastics material and is held by a metal bolt 10 the lower end of which is embedded in the upper part of the spray pipe.
Patent GB-1079008-A (GB)
Title: Orthodontic appliance
IPC: A61C7/12
Filed: 1966-03-31
Abstract: 1,079,008. Dentistry; regulating teeth. T. J. PROVENZA. March 31, 1966 [May 11, 1965], No. 14366/66. Heading A5R. An orthodontic device for straightening teeth comprises wire means for extending across a plurality of teeth, means for fastening the ends of the wire means to teeth adjacent these ends, at least one bracket means spaced along the wire means, one side of the or each bracket means being shaped to provide co-operating means for cementing the or each bracket to the outer face only of a tooth which is intermediate the teeth adjacent the ends of the wire means and the opposite side of the or each bracket means having a groove in a direction parallel to the wire means for receiving the corresponding portion of the wire means, and means for maintaining this portion of the wire means in the groove. As illustrated in Figure 5, bracket 16 is provided with a pair of holes 20 and 22 extending therethrough in the direction parallel to the groove 24 in the bracket, the wire means consists of a pair of fine parallel wires 12, and the maintaining means consists of a wire 18 reeved through the holes and having its ends secured together to form a closed loop extending around the wires 12. As illustrated in Figures 6 and 6A, the fastening means includes small diameter tubing 14 swaged over the ends of the wires 12, each end of the tubing being capable of insertion into a tube 38 forming part of a terminal bracket 34 which is to be cemented to a tooth adjacent one end of the wires 12. One side of the or each bracket means may be formed with a dovetail recess to provide the co-operating means for cementing the or each bracket to a tooth; a similar dovetail recess 36 may be formed in each of the two terminal brackets 34. The or each bracket preferably is made of porcelain, but may be made of metal or an acrylic plastics material.
Patent GB-1044296-A (GB)
Title: Motor housing
IPC: B60T13/563
Filed: 1963-04-10
Abstract: 1,044,296. Fluid-pressure brakes; covers for resisting fluid pressure; cylinders. BENDIX CORPORATION. April 10, 1963 [April 20, 1962], No. 14387/63. Headings F2F, F2P and F2T. [Also in Division G3] A fluid-pressure servomotor is modified in that the tabs 114<SP>1</SP> formed between the scallops 116<SP>1</SP> in the flange of the shell section 112<SP>1</SP> of the servomotor housing have portions 120 which are bent axially outwardly so as to act as ramps whereby, when the shell sections 110, 112<SP>1</SP> are placed together with the depressed portions 118 in the former in alignment with the scallops 116<SP>1</SP> of the latter, the depressed portions can be forced inwardly by relative rotation of the sections 110, 112<SP>1</SP> to compress the bead on the forward diaphragm without it being necessary to apply pressure by means of a die, as with the construction previously disclosed. In addition, two or more of the tabs 114<SP>1</SP> may include an abutment 122 adapted to engage in a corresponding recess 124 in the section 110 to prevent further relative rotation or axial movement after the shell sections have been assembled.
Patent GB-295774-A (GB)
Title: Process for alumino-thermal pressure welding
IPC: B23K23/00
Filed: 1927-05-28
Abstract: 295,774. Lange, F. May 28, 1927. Thermo - aluminic reaction processes. - Articles, such as rails, to be welded by pressure, are heated by a mould b having two spaces d, c the former being filled with alumino - thermal mixture and the latter with alumino - thermal melt through a runner f. Some of the melt passes through the passages e and ignites the mixture in d. Cores g protect the edges of the bottom flange.
Patent GB-704112-A (GB)
Title: Improvements in brazing or soldering alloys
Inventor: CHASTON JACK CHAMBERS
IPC: B23K35/30
Filed: 1951-06-19
Abstract: A soldering or brazing alloy contains from 15.0 per cent. to less than 24.0 per cent. of Ag, more than 30.0 per cent. but less than 40.0 per cent. of Cu and the remainder Cd and Zn with not less than 0.1 per cent. of each of these elements.  The Cd and Zn are preferably each within the range 10.0-27.0 per cent.  The alloy may also contain 0.5-3.0 per cent. Sn.
Patent GB-947520-A (GB)
Title: Improvements in the manufacture of semiconductor devices and in transistors made thereby
IPC: H01L23/485
Filed: 1960-04-26
Abstract: 947,520. Semi-conductor devices. FAIRCHILD CAMERA & INSTRUMENT CORPORATION. April 26, 1960 [May 1, 1959], No. 14517/60. Heading H1K. The alloying area of an impurity to a semiconductor is accurately defined by forming a protective adherent mask on the surface of the semi-conductor and diffusing an impurity into the semi-conductor through an opening in the mask. As shown in Figs. 1 and 2, a wafer 11 of N type silicon has a coating 12 of silicon oxide entirely covering its upper surface. The coating is formed by exposing the silicon to moisture and air or by means of a oxidizing agent such as hydrogen peroxide. Holes 13 are then made in the oxide layer by photo resist techniques or by etching, for example with hydrofluoric acid. The wafer is then out into sections to form individual diodes or the diodes may be formed and then separated from the sheet. Fig. 2 shows a section cut from the large wafer with the apertured oxide coating 2. An impurity is then placed on the aperture and heated to produce a P type region within the wafer. The edges of the junction 18 are beneath the oxide layer. A surface layer 19 of oxidized silicon is formed during this process and this is removed with hydrofluoric acid. Gold plating is then provided in the aperture to form ohmic contacts to the other side of the silicon to which wires 23, 24 are alloyed. During the manufacture of a double diffusion transistor a first junction is formed as described in connection with the diode above. The oxide masking layer is then extended as shown at 38 in Fig. 7 to form a further aperture off centre with respect to the first. Into the second layer is diffused a second impurity to form a second junction 41, the edge of which is below the oxide layer (Fig. 9). An aperture 42 is then made in the masking layer to form the base contact 46 by conventional plating techniques and a further aperture 43 for the collector connection. The emitter connection is made to the second diffused layer.