baber/WOPTO huggingface dataset:
Patent GB-414890-A (GB)
Title: Change speed and reversing gear for the longitudinal and transverse movsment of toolcarriers, of machines for grinding and polishing wooden articles
IPC: F16H19/02
Filed: 1933-07-06
Abstract: 414,890. Friction gearing. KLAGES, K., and STEINGASSER, J., (trading as STEINGASSER & CO.), 8, Mathildenstrasse, Mainz-on-Rhine, Germany. July 6, 1933, No. 19206. Convention date, July 6, 1932. [Class 80 (i).] A variable-speed and reversing friction gear for the horizontal drive of the tool of a wood grinding and polishing machine comprises one or more rollers bearing on a relatively rotatable cylinder, the axes of the rollers being inclined to that of the cylinder so that a longitudinal movement of their support is produced as the rollers follow a helical path on the cylinder, the speed being controlled by varying the angle of inclination. Rollers b are carried on pivotal supports in a bracket secured to the reciprocating toolcarriage and bear resiliently against a rotating cylinder a with their axes inclined to that of the cylinder so that they describe a helical path on the cylinder and effect the longitudinal movement of the tool-carriage. The supports d for the rollers are pivoted to longitudinal bars g joined by pivoted cross bars h one of which is continued to form a handle l for manually controlling the inclination of the rollers. In operation one of the bars g strikes stops s at each end of the traverse to reverse the inclination of the rollers and the direction of movement of the carriage. The angular movement is limited by adjustable screws p and a stop o to control the rate of traverse. Two or three rollers may be arranged around the drum instead of side by side. According to the Specification as open to inspection under Sect. 91, a roller may have a circulating movement around the drum. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specification 8953/89, [Class 80].
Patent GB-1070456-A (GB)
Title: The production of selenium rectifier devices
IPC: H01L21/56
Filed: 1965-05-06
Abstract: 1,070,456. Welding by pressure. SIEMENSSCHUCKERTWERKE A.G. May 6, 1965 [May 6, 1964], No. 19237/65. Heading B3R. [Also in Division H1] In the manufacture of selenium rectifier having an aluminium carrier electrode 2a and a tin-cadmium alloy counter electrode 2c a silver wire or tin-coated copper wire 3 with a flattened end is welded to the counter electrode by current passed between two closelyspaced electrodes in contact with the wire. A wire may be similarly attached to the carrier electrode or alternatively this electrode may be coated with a sprayed-on layer of a soft solder such as the tin-cadmium alloy of the counter electrode. The rectifier may be encapsulated in a lacquer containing a thixotropic agent. An epoxy resin lacquer is suitable and aluminium silicates such as bentonites and ammonium alkyl aluminium silicates may be included as thixotropic agents which both make dip coating of thick films possible and, due to their absorption properties, give the coating a low permeability to water vapour. When mixing the thixotropic agent and lacquer an intermediate solvent is not used as it would give rise to voids in the dried coating. If the area of contact between selenium and counter electrode is limited by an interposed insulating annulus the wires are bonded to the edge of each face instead of to the centre.
Patent GB-1388555-A (GB)
Title: Broadband microwave amplifiers
IPC: H03F3/60
Filed: 1971-06-07
Abstract: 1388555 Protective arrangements GENERAL ELECTRIC CO Ltd 5 June 1972 [7 June 1971] 19286/71 Heading H2H [Also in Division H3] A microwave power amplifier comprises a transistor 1 operating under non-linear conditions i.e. class c operation and an arrangement 18, 25, 26 providing negative feed-back only, at frequencies much lower than the microwave frequencies to be amplified. The negative feedback may be provided by emitter resistors 25, 26 which are effectively by-passed to earth by a feed-through capacitor 18 at the microwave frequencies. Alternatively for a grounded emitter amplifier (Fig. 4, not shown) an external circuitry involving transistor stages provides the required feed-back. When the input power level varies in respect of undesired amplitude modulation present along with the frequency modulated input signal, the emitter voltage varies in a corresponding manner to reduce the variations in mean collector current level. A biasing transistor 27 is arranged to become conducting when the emitter voltage becomes sufficiently negative. A controlled rectifier 31 also provides protection to transistor 1 by effectively shortcircuiting the supplies 23, 24 when the voltage across emitter resistor 25 exceeds the trigger voltage of rectifier 31. The transistor 1 may be coupled to the input, output circuitry by stripline conductors (Fig. 1, not shown).
Patent GB-722848-A (GB)
Title: Improvements in thread unwinding device for double twist spindles
IPC: D01H7/86
Filed: 1950-08-14
Abstract: 722,848. Thread unwinding device for double twist spindles. LANDOLT, K. Aug. 14, 1950 [Aug. 12, 1949 ; Oct. 22, 1949 ; March 6, 1950 ; May 17, 1950], No. 19308/52. Divided out of 722,404. Class 120 (2). A thread unwinding device for double twist spindles having a normally stationary tube adapted to carry a normally stationary bobbin wound with thread is arranged to be revolved by the thread and comprises a rotatable plate supported by antifriction bearings on said stationary parts and carrying thread guiding means partly surrounding said stationary bobbin like a cage, a portion of said cage defining a first thread-guiding and deflecting surface engageable over substantially the entire height of the bobbin by the thread being unwound, said surface being substantially vertical at its upper portion and curving gradually to its lowermost end and further means also carried by said rotatable plate and defining a second thread-guiding and deflecting surface, positioned approximately at the level of the upper end of the bobbin, the thread from the bobbin being adapted to pass from the bobbin to the exterior of the cage over said first guiding surface, over said second guiding surface and then to pass through the said stationary tube. As shown the bobbin 201 is supported by the stationary tubular shaft 202 and is held in position by the ring 203. The thread unwinding device consists of a plate 225 and stays 223, 224, the stays 223 defining the first thread guiding and deflecting surface. The second guiding and deflecting surface 228 is in the form of a twisted spiral. The plate 225 is supported on a tube 226 the upper end of which is formed with an inlet eye 227 and which is supported rotatably in the stationary tube 202 by sleeves 229 and 230. In a second embodiment the upper end of the tube 226 is journalled in a bushing carrying a ball bearing said bushing being held in the upper end of the bobbin. A centrifugally operated braking means is also provided and arranged so that the thread unwinding device is braked as it comes to rest. In a third embodiment the unwinding device is shown supported on a shaft above the bobbin this arrangement being suitable for bobbins having extremely narrow bores.
Patent GB-178372-A (GB)
Title: Improvements in gloves
IPC: A41D19/00
Filed: 1921-07-19
Abstract: 178,372. Swift, S. July 19, 1921. Gloves.-Gloves for wear by engaged or married persons have a ring of different colour to that of the glove on the ring-finger of the glove to denote their status. The coloured ring may be produced on the fabric of the glove by dye or paint, or by the insertion of a ring of fabric. A plain ring may denote marriage and a multicoloured ring engagement.
Patent GB-530819-A (GB)
Title: Hair wavers
IPC: A45D2/24
Filed: 1939-07-04
Abstract: 530,819. Hair wavers. McFADDEN, R. M. July 4, 1939, No. 19442. Convention date, Feb. 10. [Class 131] A hair waver comprises a pair of jaws 2, 3 hinged at 4, the jaw 2 being centrally curved at 5, Fig. 5, and having transversely outwardly curved wings 6, 7 and provided with a pair of co-operating clips 9, 10 by which the jaw 3 may be retained in its closed position. The jaw 3 is formed as a tapered U- shaped member the wider end being spread to form ears 14, 15 through which the hinge pin passes. The jaw 2 is provided with a number of perforations 12.
Patent GB-1134964-A (GB)
Title: Improvements in or relating to the production of layers of a silicon or germanium nitrogen compound on semiconductor crystals
IPC: C30B15/20
Filed: 1967-04-28
Abstract: 1,134,964. Layers of Si 3 N 4 , Ge 3 N 4 . SIEMENS A.G. 28 April, 1967 [29 April, 1966], No. 19594/67. Heading C1A. [Also in Division C7] A protective layer of a nitride of Si or Ge is produced on the surface of a semi-conductor crystal of e.g. Si, Ge or an A<SP>III</SP>B<SP>V</SP> compound by thermal decomposition from a reaction gas comprising a metal-free volatile compound containing nitrogen and Si or Ge, which on heating decomposes to form said layer. Pyrolytic decomposition occurs at the heated surface of the semi-conductor crystal, e.g. at 500-1200 C. Volatile compounds include aminosilanes and their derivatives, i.e. Si(NRR<SP>1</SP>) 4 , R 4-n Si(NRR<SP>1</SP>) n  (where R, R<SP>1</SP> are H, alkyl or aryl and n is 1, 2 or 3), alkyl and arylaminosilazanes (where R, R<SP>1</SP> are H, alkyl aryl and m, m<SP>1</SP>= 1, 2, 3), cyclic Si-N compounds and silicon isocyanate. A gaseous mixture of alkylaminosilanes with ammonia or with alkylamines and hydrogen can also be used. Corresponding Ge compounds may be used. The volatile compound is preferably mixed with a carrier gas, which may be hydrogen, nitrogen or rare gases (or mixtures of these) if the compound contains Si or Ge bonded only to nitrogen. If Si or Ge is also linked to carbon or hydrogen, addition of ammonia or a gaseous alkylamine to the abovementioned carriers is necessary, at least when the atom ratio N: Si is smaller than 3: 2. Monocrystalline layers of nitrides to be used as semi-conductors may be deposited, e.g. on a substrate of silicon or silicon carbide in which the deposition surfaces are (III)-surfaces, if the process described in Specification 802,842 is used and if the composition of the reaction gas is gradually changed so that at first said nitride is deposited in admixture with a large proportion of the semi-conductor material of the substrate, the proportion of nitride then being gradually increased while that substrate semiconductor is gradually decreased, until finally only the nitride is deposited.
Patent GB-950853-A (GB)
Title: Improvements in or relating to switch stators
IPC: H01H11/00
Filed: 1960-06-02
Abstract: 950,853. Moulding stator supports. TROLEX CORPORATION. June 2, 1960 [Feb. 1, 1960], No. 19604/60. Heading B5A. A stator for a rotary switch is formed by punching perforations 21 into a strip of metal 20 so as to form radially disposed fingers 14, each carrying hemispherical projections 24, half of which are located on each side of the strip 20, rolling the strip up, Fig. 9 (not shown), adjacent turns being separated by the projections, washing it in a bath of cleaning solution, locating it in a mould; Fig. 7, and then injecting plastic material containing fibre-glass through gate 30 into the mould cavity 29. The plastic material is guided by the inner surfaces 25 of the projections 24, Fig. 8, from one side of the strip to the other causing a differential rate of flow on opposite sides of the strip, and the projections 24 are embedded in the moulded ring 11. The strip is then fed to a punch press and the ends of the fingers are stamped out to form contacts, Fig. 1 (not shown).
Patent GB-1269766-A (GB)
Title: Improvements in or relating to alkali metal salt recovery
IPC: C07C39/235
Filed: 1970-04-23
Abstract: 1,269,766. Alkali metal phenates and salts of organic acids. TENNECO CHEMICALS Inc. 23 April, 1970 [19 May, 1969], No. 19606/70. Heading C2C. A process for the production of substantially anhydrous particles of an alkali metal salt comprises atomizing an aqueous feed solution of the salt, contacting the resulting spray with a heated stream of inert gas containing less than 0À5% by volume of carbon dioxide so as to effect dehydration and solidification of the alkali metal salt in the spray, separating from the inert gas stream substantially anhydrous, finelydivided particles of the salt, measuring the carbon dioxide content of the inert gas after it has contacted the spray and adding alkali metal hydroxide to the aqueous feed solution so as to maintain the carbon dioxide content of the inert gas within a predetermined range and to maintain the alkalinity of the aqueous feed solution within the range of 0 to 0À5 molar per cent. The production of sodium phenate is described using the apparatus in the drawing (not shown). Numerous phenols and acids of which the alkali metal salts may be employed as starting materials are listed.
Patent GB-1464238-A (GB)
Title: Preparation of dicyclohexanol-propane
IPC: C07C35/22
Filed: 1975-05-09
Abstract: 1464238 Process for the preparation of dicyclohexanol propane INSTITUTE FRANCAIS DU PETROLE 9 May 1975 [10 May 1974] 19683/75 Heading C2C The invention comprises a process for the preparation of 2,2-di(cyclohexan-4-ol)propane by catalytic hydrogenation of bisphenol A in 2-ethylhexanol as solvent.
Patent GB-778453-A (GB)
Title: Improvements in and relating to transfers and to ceramic colours for use in the preparation thereof
Inventor: KERRIDGE FRANK ENOCH
IPC: B41M3/12
Filed: 1954-07-06
Abstract: 778,453. Transfers. JOHNSON MATTHEY & CO., Ltd. Aug. 26, 1955 [July 6, 1954], No. 19742/54. Class 100(2) Transfers for decorating glass, pottery &c. with designs intended to be fired after application, are prepared by printing a varnish layer on to a paper backing lithographically, by screen printing &c., dusting the varnish with ceramic colour powder whilst substantially simultaneously applying a substance to accelerate the hardening or to promote the rapid hardening of the varnish. and then removing the colour powder from the unvarnished areas. The exclusion of the accelerator or hardener from the varnish as initially applied avoids premature drying, while its application as stated enables sufficient to be used to ensure rapid drying. The invention is of particular use in the preparation of multicolour transfers wherein colour powders containing, e.g. 1 to 10 per cent of mineral oil or other low volatility liquid are used to prevent colour from adhering to a previously applied colour layer. The colour powder itself may incorporate the accelerator or hardener, which for use with natural resin-based or synthetic alkyd resin-based varnishes may consist of 0.5 to 10 per cent by weight cf commercial paint driers such as mixtures of the resinates, naphthenates and/or linoleates of lead, zinc, copper, cobalt or manganese; an example of such a colour powder is: lead antimonate yellow pigment 50 parts by weight, ceramic flux 50 parts, lead naphthenate (about 33 per cent lead) 1, manganese naphthenate (about 11 per cent manganese) 0.63; with or without mineral oil (viscosity SAE 30) 2. The naphthenates and oil are dissolved in sufficent white spirit to moisten completely the ceramic colour, and 'the white spirit is then allowed to evaporate.- With synthetic amino resin-based varnishes, 0.5 to 5 per cent of a solid organic acid such as oxalic acid. citric acid, tartaric acid or cinnamic acid is used as hardener.
Patent GB-311688-A (GB)
Title: Improvements in and relating to grinding mills
IPC: B02C15/12
Filed: 1928-07-07
Abstract: 311,688. Fuller Lehigh Co., (Assignees of Hardgrove R. M.). May 14, 1928, [Convention date]. Ball-and-ring mills and apparatus.-In a grinding mill having grinding balls 8 between opposed grinding surfaces 6, 17 the grinding surfaces slope downwardly and outwardly, the angle between the surfaces being inclined, preferably, between 20‹ and 70‹. The rotatable table 15, Fig. 1, is provided with a removable grinding ring 17 and ploughs 19 and the outer grinding ring 6 is secured to the housing by a ring 7. In a modification, Fig. 4, the rotatable grinding surface is formed on the table 15<1> and the grinding ring 6<1> is wedged on to a conical seating formed on the casing 12. A loading ring 30 rests upon the balls to increase the grinding effect. The balls may have different diameters.
Patent GB-819903-A (GB)
Title: Improvements in or relating to raking devices
IPC: A01D78/00
Filed: 1956-06-26
Abstract: The subject-matter of this Specification is identical with that of Specifications 819,901, 819,902, but the claims differ.
Patent GB-685656-A (GB)
Title: Improvements in and relating to the preparation of organohalogenomonosilanes
IPC: C07F7/12
Filed: 1950-08-09
Abstract: Organohalogenomonosilanes are prepared by heating at a temperature of at least 250 DEG  C. a mixture of organohalogenodisilanes corresponding to the general formula Si2XnR6-n, wherein R represents a monovalent hydrocarbon radical, X represents a halogen atom and n is from 1 to 5.  The preferred reaction temperature when using a mixture of methylchlorodisilanes of the above general formula is from 250 DEG  to 800 DEG  C.  The radical R may be an alkyl radical, e.g. an ethyl, propyl, butyl, isobutyl, amyl or decyl radical, an aryl radical, e.g. a phenyl, naphthyl or anthracyl radical, an alkanyl radical, e.g. a tolyl, xylyl or ethylphenyl radical, an aralkyl radical, e.g. a benzyl or phenylethyl radical, or may be other saturated and unsaturated aliphatic and cycloaliphatic radicals, e.g. the vinyl, allyl, butadienyl, propinyl, cyclohexanyl, cyclohexenyl or cyclopentanyl radical.  The halogen atom X may be chlorine, bromine or fluorine.  Disilanes of the above formula are obtained when an alkyl or aryl halide is passed over heated silicon in accordance with the process of Specification 575,667, preferably in the presence of copper, e.g. when methyl chloride is passed over heated silicon in the presence of copper a mixture of disilanes of the above general formula is obtained, wherein R is a methyl group and X is a chlorine atom, comprising large amounts of 1,1 - dimethyl - 1,2,2,2 - tetrachlorodisilane and 1,2 - dimethyl - 1,1,2,2 - tetrachlorodisilane, and isomeric trimethyltrichlorodisilanes as well as small amounts of methylpentachlorodisilane and isomeric tetramethyldichlorodisilanes.  The disilanes may be passed through a heated zone which may contain materials usually employed in cracking processes, i.e. copper, or a chloride of iron or aluminium.  In the example, a mixture of the methylchlorodisilanes referred to above is passed through a heated tube to give methyldichlorosilane, trimethylchlorosilane, methyltrichlorosilane and dimethyldichlorosilane.
Patent GB-1388645-A (GB)
Title: Unitary cage for roller bearings having an inner race ring formed with lateral flanges and a removable outer  race ring and method of shaping the cage on assembly of the bearing
IPC: F16C33/54
Filed: 1973-04-26
Abstract: 1388645 Bearings SKF INDUSTRIAL TRADING & DEVELOPMENT CO BV 26 April 1973 [26 April 1972] 19836/73 Heading F2A A method of making a cage for a radial rolling bearing having an inner race ring formed with integral lateral flanges and a removable outer race ring comprises the following steps: (a) forming a unitary annular sheet metal element 1<SP>1</SP> having a diameter greater than that of the pitch circle with a plurality of apertures 5<SP>1</SP>, the circumferential width of each aperture being greater than the diameter of a rolling element; (b) locating the annular element coaxially with the inner race; (c) inserting the rolling elements radially through the apertures; (d) exerting on the sides 7<SP>1</SP> of the annular element a plurality of radially inwardly directed forces so as to corrugate the sides, thereby reducing the outer diameter of the annular element and the circumferential width of the apertures. Step (d) is carried out with a multiple punch tool. The radially inner face of each side strip 7<SP>1</SP> is provided with weakening notches on either side of the junction with each cross piece 6.
Patent GB-531628-A (GB)
Title: Improvements in or relating to thermionic valves
IPC: H01J19/40
Filed: 1939-07-07
Abstract: 531,628. Thermionic valves. STANDARD TELEPHONES & CABLES, Ltd, and BACK, R. R. July 7, 1939, No. 19839. [Class 39 (i)] The valve has a convex anode 16 and a tubular indirectly heated cathode 8 supported by mica plates 9 from a metal disc 5. This carries the shields 6, 7 for the cathode ends and for the leads 11. The cathode is at right angles to the anode axis.
Patent GB-1472025-A (GB)
Title: Fluent material level detector
IPC: G01F23/26
Filed: 1975-05-12
Abstract: 1472025 Determining fluid level L KLEBANOFF and D V BINEE 12 May 1975 19883/75 Heading G1N A device for detecting a predetermined level of fluent material in a closed container comprises two capacitors vertically spaced apart and each made up of three vertically spaced plates 14, 16, 18 taken in pairs with the middle one 16 common and the fluent material as the dielectric. An amplifier transistor 22 has the uppermost capacitor 14, 16 connected in a negative feedback loop of the amplifier and the lowermost capacitor 16, 18 connected in a positive feedback loop of the amplifier whereby when the fluent level changes so as to cause a decrease in the negative feedback current or an increase in the positive feedback current the amplifier is caused to oscillate. In use, when the level is such that both capacitors are filled with the same dielectric the feedback signals balance each other. An alarm circuit is described Fig. 2 (not shown). The capacitor plates are constituted by three strips of metallic foil on a web of non- conductive tape with an adhesive backing.
Patent GB-693294-A (GB)
Title: Process for manufacturing raised fabrics for blankets, plaids and the like
IPC: D06C23/00
Filed: 1950-08-10
Abstract: 693,294. Napped fabrics. RADICI, L. Aug. 10, 1950 [Aug. 11, 1949], No. 19902/ 49. Drawings to Specification. Class 142 (iv) Narrow zones of plain weave separate twill-woven pattern and ground areas, whereby the contours of the pattern are unaffected by the raising treatment. The fabric is weft backed, the two wefts being interchanged to produce a pattern of different colour from the ground.