baber/WOPTO huggingface dataset:
Patent GB-461469-A (GB)
Title: Improvements in and relating to frictional transmission gearing
IPC: F16H15/28
Filed: 1936-03-20
Abstract: 461,469. Variable-speed friction gearing. SKODA WORKS, PLZEN, and GOTZ, F. March 20, 1936, Nos. 8402 and 8403. Convention dates, March 21, 1935 and March 23, 1935. [Class 80 (ii)] In variable-speed and reversing friction gearing comprising a tiltable shaft 6 having mounted on the ends thereof dome-shaped friction elements 7, which are pressed against the inner friction surface of a drum 9, the latter is mounted at both sides in bearings 26, 27, through one of which pass the means for tilting the shaft. The shaft 6 is journalled in a frame 18, pins 3, 19 secured to the latter being journalled in a fixed frame 22. A control link 30 passing through the bearing 27 is connected to an arm 20 on the pin 19. The shaft 6 is driven from a main shaft 1 by bevel gears 2, 4, 5, the gear 4 being loose on the pin 3. In order that the frame 18 may be tilted equally in either direction, the arrangement indicated in Fig. 7, employing a double wheel 4, may be adopted. The elements 7 are urged outwards by springs 16, Fig. 4, and are in threaded engagement with the shaft 6, so that they are pressed against the drum with a pressure corresponding to the torque to be transmitted. By arranging the wheel 4 either above or below the shaft 6, depending on the direction of rotation of the shaft 1, the disturbing influence exerted on the shaft 6 due to the reactions between the drum and the elements 7 may be partially or wholly counterbalanced. In another form, the frame 18 constitutes the stator of an electric motor, the shaft 1 and gears 2, 4, 5 being dispensed with, and the link 30 is controlled by screw-and-nut mechanism. One of the elements 7 may be fixed to the shaft 6.
Patent GB-1383004-A (GB)
Title: Dental products
IPC: A61K8/73
Filed: 1972-05-25
Abstract: 1383004 Abrasive compositions COLGATEPALMOLIVE CO 25 May 1972 [3 June 1971] 8455/74 Divided out of 1383003 Heading C4V [Also in Division A5] Abrasive agglomerates suitable for cleaning teeth are produced by (a) dry mixing thermoplastic particles having a mean diameter between - 100 and 1000 Á and abrasive particles having a mean diameter between 0À1 and 10 Á and a Mohs hardness of at least 2, (b) tumbling the mixture whilst maintaining it at a temperature above the softening point of the thermoplastic and (c) cooling the mixture. Between steps (b) and (c) the mixture may be screened to remove fine particles and the agglomerates reheated before cooling. The products usually comprise a core of thermoplastic material with the abrasive concentrated in the surface. Some cores may be hollow. Thermoplastics specified include polythene, α-methyl styrene-vinyl toluene copolymer, gums, gels, paraffins and carnauba wax. Abrasives specified include zirconium silicate, silica, stannic oxide, feldspar, topaz, calcium silicate, silicon carbide, pumice, alumina, ilmenite, haematite, titanium dioxide, dicalcium phosphate dihydrate, calcium carbonate and ground glass.
Patent GB-973315-A (GB)
Title: Magnetic recording element and method of manufacture thereof
IPC: C09D5/23
Filed: 1962-03-05
Abstract: 973,315. Magnetic structures. RADIO CORPORATION OF AMERICA. March 5, 1962 [March 13, 1961], No. 8463/62. Heading H1H. A magnetic recording medium comprises a polyester base 21 which is provided with an adhesive sub-coating 23 and a further coating 25 of magnetic particles in a binder, the subcoating comprising a copolymer having the formula where n/m is between 80/20 ed 95/5, X is H, CH 3  or COOR, Y is CH, CH 2 COOR, COOR and R is H or an alkyl radical. The sub-coating may comprise copolymers of vinylidene chloride with the following:-methyl acrylate, 2-ethylhexyl acrylate, butyl acrylate and acrylonitrile, methyl methacrylate and acrylic acid, ethyl acrylate and itaconic acid and suitable solvents are methyl ethyl ketone, dioxane and tetrahydrafurane. The magnetic layer 25 may comprise acicular Fe 2 O 3 , Fe 3 O 4 , ZnFeF 2 O 4  in a binder which may be any of the following: (a) vinyl chloridevinyl acetate copolymers, (b) acrylic polymers, e.g. methyl methacrylate and methyl acrylate, (c) polyamides and alkoxy-substituted polyamides, (d) polyurethanes and (e) polycarbonates. The base may be oriented terephthalate. In preparation the sub-coating solution is applied to the base and dried, the magnetic coating is then applied, subjected to an orientating magnetic field, and dried, and the structure is then heated to a temperature above the fusion point of the sub-coating to bond it to the other two layers. The sub-coating may be 0.5 to 2 Á thick, the magnetic layer 0.45 or 0.35 mils. thick.
Patent GB-1362728-A (GB)
Title: Magnetic tape cassette players
IPC: G11B15/675
Filed: 1972-02-24
Abstract: 1362728 Tape cassette recorders/players INTERNATIONAL BUSINESS MACHINES CORP 24Feb 1972 [10 March 1971 (3)] 8527/72 Heading G5R Transducer 17 and pinch roller 18 are pivotally connected to a cassette-engaging member 22 through a lost-motion linkage such that they are brought into tape engagement only when the cassette 35 is substantially in operative position on drive shafts 14, 15. In a first embodiment, Figs. 1, 3, the head 17 and roller 18 are mounted on a shaft 44 linked to a main pivot shaft 36 for rotation therewith. A cam 55 having a step 58 is mounted at each end of the shaft 36. The cassette-engaging member 22 is mounted on an arm 60 pivoted at 61 and having a cam follower 62. On cassette insertion, member 22 must be depressed sufficiently against spring action 63 for cam follower 62 to clear the step 58, to release the shaft 36 for rotation in direction 51 under spring action 66, thereby engaging the head 17 and roller 18, Fig. 4 (not shown). The cassette 35 is locked in operative position by a member 20 which is moved inwardly by a surface 70 to engage a cassette shoulder 71 as the cassette 35 is lowered. To eject the cassette 35, a push-button 16 is depressed to rotate the shaft 36 in the opposite direction until cam follower 62 re-engages the step 58. In a second embodiment, Fig. 8, the head 17 and the roller 18 are separately connected to a main pivot member 34, which is biased for rotation in direction 76 by a spring (72), Fig. 9 (not shown) linked thereto by members 53, 73, 54. The linkage connecting head mounting arm 42 to the main pivot member 34 includes a projection 26 engageable with an arm 25. Upon cassette insertion, the cassette-engaging member 21 depresses the arm 25 against a spring (80), Fig. 10 (not shown), eventually to beyond the projection 26 thereby releasing the member 34 for rotation 76, Fig. 7 (not shown). The pinch roller 18 is resiliently connected to the main pivot member 34 by a spring 30, so that on holding eject button 16 partly depressed, e.g. by a detent, the head 17, but not the roller 18, disengages the tape. This may be utilized for fast re-wind. Cassette locking members 83 are interconnected by a wire 85 connected to the arm 25, and are thus pivoted inwardly as the cassette 35 is depressed.
Patent GB-526479-A (GB)
Title: Improvements in fluid seals
IPC: F16J15/36
Filed: 1939-03-17
Abstract: 526,479. Stuffing box substitutes. GENERAL MOTORS CORPORATION CO.. March 17, 1939, No. 8543. Convention date, March 21, 1938. [Class 122 (v)] A fluid seal 30 for a rotary shaft 22 is made of rubber or like material and consists of two spaced annular flanges 34 and 36, extending inwardly from the respective ends of a central sleeve portion 32. The flange 34 grips the shaft, whilst the flange 36 which is less resilient than the other and is of somewhat larger diameter than the shaft, abuts against a sealing surface 42 formed on the housing. To prevent relative rotation between the seal and the shaft, the flange 36 may be provided with ears 38 and may also contain graphite to assist lubrication. The resilient seal is pressed against the surface 42 by a spring 46, an annular shield 48 being provided to protect the rubber if required.
Patent GB-715097-A (GB)
Title: Improvements in or relating to centering for arches and the like
IPC: E04G11/50
Filed: 1952-04-03
Abstract: 715,097. Centering for arches. CRUCIANI, E. April 3, 1952 [Aug. 7, 1951], No. 8560/52. Class 20 (2) Centering for arches comprises shuttering 11, Fig. 1, supported by a built-up wooden truss structure having upper and lower layers 4, 1, Fig. 2, each formed of superposed boards, the layers being spaced apart by blocks 3 and the boards of each layer and the layers themselves being connected together by channel members 7 extending across the layers and connected together by bolts 2, 5, 6 arranged outwardly of the side walls of the layers. No weakening holes are thus formed in the boards and the arrangement permits truss structures of varying curvature to be built up from the same elements.
Patent GB-752826-A (GB)
Title: Improvements relating to the preparation of í¸ pregnene-17ª , 21-diol-3,11,20-trione-, 20-di-alkylene ketals
IPC: C07J5/00
Filed: 1954-03-24
Abstract: D 5 - Pregnene - 17a  : 21 - diol - 3 : 11 : 20 trione - 3 : 20 - di - alkylene diketals are prepared from the corresponding 11a -hydroxy derivatives by oxidation under alkaline conditions, particularly using chromium trioxide in a basic organic solvent such as pyridine, dialkylamines, trialkylamines or quaternary ammonium compounds.  In an example: D 5-pregnen - 11a  : 17a  : 21 - triol - 3 : 20 - dione diethylene ketal in pyridine is treated with chromic anhydride at room temperature, the mixture poured into aqueous sodium bicarbonate, pyridine steam-distilled out, and D 5-pregnen - 17a  : 21 - diol - 3 : 11 : 20 - trione - 3 : 20 - diethylene ketal extracted from residue with ethyl acetate.  D 5 - Pregnen - 11a  : 17a  : 21 - triol - 3 : 20 - dione diethylene ketal is prepared by refluxing D 4 - pregnen - 11a  : 17a  : 21 - triol - 3 : 20 - dione with p-toluene sulphonic acid in benzene and ethylene glycol.  Specification 732,569 is referred to.
Patent GB-423137-A (GB)
Title: Improvements in electric motor generators
IPC: H02K47/14
Filed: 1934-03-19
Abstract: 423,137. Motor generators. FLETCHER, G. H., 4, Tapton House Road, Sheffield, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Crown House, Aldwych, London. March 19, 1934, No. 8627. [Class 35] In a motor generator having a common housing and a common armature shaft 15, the housing is formed in two parts 16, 17 separated by an insulating joint 29, the sleeve 7 carrying one of the armatures and the associated part 16 of the housing being insulated from the shaft 15. As shown applied to a machine designed to supply a low voltage current on vehicles, the housing part 16 encloses a higher voltage motor and the part 17 a low voltage generator. The inner bearing race 23 at the motor end is carried by the sleeve 7 which is insulated from the shaft, so that no insulation is necessary between the housing 16 and the shaft. In a modification, the shaft is journalled in the end of the housing 16 which is insulated from the outer member of the bearing. The machine as a whole is insulated from its support preferably by means of rubber to obtain a resilient mounting or one part only of the housing need be insulated either by an insulating suspension or by being supported from the other part of the housing.
Patent GB-141502-A (GB)
Title: An improved safety guard for motor cars and like vehicles
IPC: B60R21/34
Filed: 1919-04-07
Abstract: 141,502. Robinson, M. W. April 7, 1919. Wheel guards and safety appliances.- When a motor-car or like vehicle encounters an obstacle, the front member 22 is forced back, whereby a push-bar 27 releases a collar 18 from the hinged locking- member 20 and permits springs 28 to pull the skids 4 under the rear vehicle wheels 2. The members 4 are pivotally supported on brackets 6 slidably mounted on inclined guides 7 secured to the vehicle. The skids 4 are connected by a cross-bar 15 and are provided with rollers 14 preferably mounted on ball bearings. The device may be reset by the hand operation of links 17.
Patent GB-937643-A (GB)
Title: Improvements in or relating to oil sealing rings of pistons
IPC: F16J9/24
Filed: 1962-01-07
Abstract: 937,643. Pistons. SEALED POWER CORPORATION. March 7, 1962 [March 13, 1961], No. 8753/62. Class 122 (1). In a piston and oil ring assembly for a non- vertical cylinder of an engine and comprising split rings 24, 26 axially spaced and urged radially outwards by an expander-spacer spring ring 28, means are provided to prevent or limit relative rotation between the spring ring 28 and the piston 10. The ring 28, which is of metal strip corrugated radially to form alternate inner and outer crowns 28a and 28b and has intermediate oil venting slots 28c, is provided adjacent each end with radially inwardly extending tabs 32, 34 that project into an oil drainage slot 10c in the bottom of the piston groove 19 to thereby limit relative rotation between the ring and the piston and thereby similarly limit relative rotation between the rings 24 and 26 and the piston. In use, the oil ring assembly is arranged so that the gaps 30 in the rings 24 and 26 are located adjacent the high side of the cylinder where the rate of oil accumulation is least. Specification 805,458 is referred to.
Patent GB-852343-A (GB)
Title: Improvements relating to the production of senna products
Inventor: CORRAN ROBERT FREDERICK
IPC: A61K36/00
Filed: 1957-03-18
Abstract: A powder containing the active principles of senna in concentrated form is produced by grinding whole senna pods and separating the fine powder produced from the coarse powder by sieving or other suitable means, and rejecting the coarse powder. The fine powder may be used for compounding into recognised pharmaceutical forms for example plain, coated, or effervescing tablets, pills, suppositories, granules.
Patent GB-1186571-A (GB)
Title: Organosilicon Compositions
Inventor: GIBBON ROBERT MUIR
IPC: C08L83/04
Filed: 1967-02-24
Abstract: 1,186,571. Coated paper. IMPERIAL CHEMICAL INDUSTRIES Ltd. 9 Feb., 1968 [24 Feb., 1967], No. 8855/67. Heading B2E. [Also in Division C3] Paper is coated with a composition comprising 100 parts by wt. of diorganopolysiloxane (I) soluble in organic solvent and containing at least two si-bonded OH groups, I to 25 parts by wt. of a liquid polysiloxane (II) having not less than Si-bonded hydrogen atoms (attached to different Si atoms), 2 to 20 parts by weight of an organic tin compound (III) soluble in organic solvents, and from 0.2 to 15 parts by wt. of an amine having a dissociation constant in aqueous solution of not less than 10-<SP>9</SP>. I may have a viscosity of 3000 to 10<SP>8</SP> cs. at e.g. an OH-terminated dimethylpolysiloxane. II may have a visocity of .5-200 cs. at 25‹C e.g. a methylhydrogenpolysiloxane. III is defined as a diorganotinacylate in which the acyl group is derived from a monovalent acid and is a monovalent aromatic group or an aliphatic group having no more than 4 carbon atoms and which may contain substituents, a diorganotin alkoxide or phenoxide, a diorganodioximotin, a dioximopolydiorganostannoxane or a diacylpolydiorganostannoxane. Examples of IV are tetraethylenepentamine, aminobutanol, allylamine, benzylamine, nbutylamine, diethylamine, n-octylamine, piperidine, triethanolamine, triethylenediamine and tetramethylguanidine. Examples relate to the coating of a vegetable parchment paper. The coating has a releasing action with pressure sensitive adhesives.
Patent GB-489678-A (GB)
Title: Improvements in or relating to impact breaking or crushing machines
IPC: B02C13/28
Filed: 1937-03-25
Abstract: 489,678. Impact pulverizers. PATTINSON, G. H. March 25,1937, No. 8874. [Class 59] A rotor for an impact pulverizer comprises end plates or discs having oppositely facing projections forming radial recesses, and one or more hammer holders each of which extends longitudinally of the rotor and has arms the ends of which are secured in the radial recesses. As shown the beater holders 8, which may support hammers 9 of the kind described in Specification 475,430, are provided with lugs 6 housed in recesses 5 in the end discs 2. The recesses are formed by ridges 4 and the lugs are secured to the discs by bars 10 and washers 10<1>. The periphery of each disc may be protected by segmental or integral wear strips 11 formed with lugs 13 which form a continuation of the ridges 4.
Patent GB-1460132-A (GB)
Title: Apparatus for atomising a liquid or pasty substance
IPC: B05B3/10
Filed: 1975-03-04
Abstract: 1460132 Spray producers KRAUSSMAFFEI AG 4 March 1975 [23 March 1974] 8969/75 Heading B2F Apparatus for atomising a liquid or pasty substance, comprises an atomiser disc 2 rotatable about a vertical axis and positioned below an annular feed passage 10 for the substance, and a distributor insert 13 having a lower portion in the form of a downwardly tapering cone frustum or a hollow cylinder coaxial with the disc, said insert having an inner surface 12 adjoining the radially externally situated side wall of the annular passage and a lower edge 14 adjacent disc 2 to form an annular gap 16 for the passage of the substance which is spread out over the disc surface with the aid of centrifugal force. The disc 2 may be displaceable vertically to alter the width of gap 16. A hollow frustoconical deflector insert 23 may be provided inside insert 13 to form an annular pre-gap 29 therewith, the deflector insert being displaceable vertically to alter the width of gap 29. The substance issues from the apparatus from slots 18 between vane inserts 17. A double outer wall 9 for the passage of cooling medium is provided.
Patent GB-874015-A (GB)
Title: Tropine esters
Inventor: VECCHI ALBERTO
Filed: 1959-03-16
Abstract: The invention comprises racemic and optically active esters of the general formula <FORM:0874015/IV (b)/1> (wherein R represents a C1-C8 alkyl radical), and the preparation thereof by heating an equimolecular mixture of tropine and a racemic or optically active a -alkyl-O-acetyltropic acid chloride of the general formula <FORM:0874015/IV (b)/2> at 100-150 DEG C. in an inert organic solvent and splitting off the acetyl group with hydrochloric acid at room temperature.  The products possess properties similar, but superior, to those of atropine.  a -Alkyl-O-acetyltropic acid chlorides of the second general formula above are prepared by refluxing a -alkyltropic acids with acetic anhydride, and refluxing the resulting a -alkyl-O-acetyltropic acids with thionyl chloride.  (-)- and (+)-Methyltropic acids are prepared by resolving DL-a -methyltropic acid with quinine and brucine respectively.
Patent GB-370635-A (GB)
Title: Improvements in or relating to coke-ovens
IPC: C10B5/02
Filed: 1931-03-24
Abstract: 370,635. Coke ovens. TOTZEK, F., 59, Salkenbergsweg, Stoppenberg, Essen, Germany. March 24, 1931, No. 9026. Convention date, March 31, 1930. [Classes 51 (i) and 51 (ii).] In a twin-flued coke oven in which connecting openings 18 are provided at the lower ends of the pairs of flues for allowing recirculation of a portion of the waste gases, the rich gas and air ports 17, 15 are so situated in relation to one another, and to the opening 18, that the recirculated gas will pass in between the streams of inflowing rich gas and air and so delay their mixing. As shown in connection with an oven which can be heated either by rich or lean gas, the ports 17, 15 are spaced apart horizontally in a direction parallel to the partition walls between the flues, and the lean gas and air ports 16, 15 merge into one another, so that mixing is effected before the gases enter the flue.
Patent GB-493284-A (GB)
Title: Improvements in metal heating furnaces
IPC: C21D9/663
Filed: 1937-03-31
Abstract: 493,284. Metal - heating furnaces. TRIGGS, W. W. (American Rolling Mill Co.) March 31, 1937, No. 9134. [Class 51 (ii)] In a furnace of the bell type in which the charge is enclosed within a protective cover 19, the heating-flues extend along or inwardly of the outer boundaries of the cover. In one form, Fig. 1, the heating flues 20 are of U-shape and are mounted on the furnace base, or on a removable frame between the base and the bell 12, so as to be independent of both the cover 19 and bell. Alternatively, the flues are mounted on the protective cover, e.g. as shown in Fig. 10, in which curved flues 56<1> are welded to the cover at their upper ends, and extend loosely at their lower ends over short tube sections 63 also welded to the cover. Heating- gases are supplied by burners 57<1>, which, with their surrounding tubes 60<1>, can be retracted when it is desired to remove the bell. The burners may be mounted in the furnace base, and waste gases can be exhausted through ports 64, or through flues carried by the bell and extending downwards to below the level of the upper ends of the heating-flues. In other forms, the flues extend upwards through the roof of the cover or are formed by channel members on the inner face of the cover, or by covering corrugations in the cover by plates which are dished at their upper ends to connect adjacent flues.
Patent GB-989619-A (GB)
Title: Improvements in or relating to electrical circuits including transistors
Inventor: SUMMERS DONALD
IPC: H03F3/50
Filed: 1961-03-13
Abstract: 989,619. Transistor amplifying circuits. TEXAS INSTRUMENTS Ltd. March 2,1962 [March 13, 1961], No. 9175/61. Heading H3T. A stabilized amplifier of high input and low output impedance comprises a direct-coupled pair of emitter-follower stages VT2, VT3, Fig. 4, in cascade. The two transistors are of opposite conductivity type and the base bias of the first is derived, over an adjustable resistor R4, from a potentiometer in the emitter circuit of the second transistor comprising a load resistor R3 in series with a constant voltage dropping device. The latter may comprise a battery Eb, a Zener diode MZ, or in the case of an amplifier for A.C. only, a resistor shunted by a capacitor. The collector electrode of transistor VT3 is connected to the positive supply via series resistor R6; alternatively it may be connected to a source of low positive voltage, e.g. a potential divider connected between earth and the positive supply line. The arrangement reduces " drift " and minimizes noise. In an A.C. signal application the output may be taken across resistor R6. In a modification, the input impedance is increased by coupling the arrangement to a further circuit comprising two direct-coupled emitter-follower stages VT4, VT5, Fig. 5, of opposite conductivity types. The arrangement may alternatively be followed by a voltage amplifier which applies series voltage feedback to the input so as to multiply the input impedance by the overall loop gain.
Patent GB-1155506-A (GB)
Title: Process for the Production of Areno-Oxazinone Compounds
IPC: C07D265/12
Filed: 1968-02-26
Abstract: 1,155,506. Areno-oxazinone compounds. J. R. GEIGY A.G. 26 Feb., 1968 [27 Feb., 1967], No. 9176/68. Heading C2C. Areno-oxazinone compounds of general formula wherein R represents the radical of a mono- or poly-nuclear, homocyclic or heterocyclic aromatic ring system which is linked with the 2-position of the oxazinone ring by way of a ring of said system not containing nitrogen, and A represents the divalent radical of a mono- or poly-nuclear homocyclic aromatic ring system, the bonds of which are in the O-position which ring systems can optionally contain substituents which remain unchanged under the reaction conditions, are prepared by condensing an acid halide of formula R-CO-X with an O- hydroxy carboxylic acid amide of formula in which X represents chlorine or bromine, the condensation being performed at raised temperature while splitting off and removing hydrogen halide and water. The process is preferably carried out in the presence of up to 0À2 equivalents of a tertiary nitrogen base or of a tertiary amide of a low fatty acid acting as reaction accelerators, and in a boiling aprotic organic solvent which acts as a water entrainer.