baber/WOPTO huggingface dataset:
Patent GB-902064-A (GB)
Title: Blade damping means for compressors and turbines
IPC: F01D5/22
Filed: 1961-05-19
Abstract: 902,064. Turbine and compressor-bladed rotors. UNITED AIRCRAFT CORPORATION. May 19, 1961 [May 31, 1960], No. 18301/61. Class 110(3). A turbine or compressor-bladed rotor assembly comprises a rotor disc supporting a series of radially-extending blades at the periphery thereof, means being provided for restraining alternate blades against relative movement adjacent the tips thereof, the intermediate blades being mounted for relative freedom of movement with respect to the alternate blades. A portion of an axial-flow compressor rotor is shown in Fig. 1, the alternate blades 14, 18 being connected together at their tips by means of rings 22, 24 secured thereto, the intermediate blades 16 being formed with cut-away portions 26, 28 to receive the rings 22, 24 but no connection is provided therebetween. The adjacent surface of the stator casing 36 may be formed with grooves 32, 34 to receive the rings 22, 24. In a second embodiment, Fig. 5, the alternate blades 42, 44 are again interconnected at their tips by rings 50, 52, but the intermediate blades 41, 43 are also interconnected at their tips by means of a ring 56 secured thereto, the ring 56 being received in recesses 54 at the tips of the blades 42, 44 but not connected thereto.
Patent GB-953340-A (GB)
Title: Piezoelectric transducers
IPC: B06B1/06
Filed: 1960-05-24
Abstract: 953,340. Piezoelectric elements. SOUTH AFRICAN COUNCIL FOR SCIENTIFIC & INDUSTRIAL RESEARCH. May 24, 1960 [June 3, 1959], No. 18363/60. Heading H1E. [Also in Division H4] An electromechanical transducer comprises a powder capable of being electrically polarized to impart piezo-electric properties, mixed with an insulating liquid which wets the powder. The two constituents are mixed to form a paste consisting e.g. of 70% barium titanate in ethoxylene resin or polyisobutylene. The mixture is made at 100‹ C. in order to eliminate moisture. The volume percentage of the powder may range from 10 to 90 and the size of particles from 50 to 500 microns. If the transducer is intended for use at a frequency corresponding to a wavelength # the size of the particles is made equal to or less than #/2. The pastes comprising finer powders may be polarized at room temperatures using fields of about 8 kv./cm. for about 1 min. For the coarser powders, a temperature of 135‹ C. is used for polarization. The paste 1 may be confined within a soapstone ring 2 upon the surface of an object 3 which is to be subjected to ultrasonic testing, the polarizing potential being applied between the object 3 and an electrode 4b. The bottom of the electrode may be coated with a silicone paste or with polyethylene. The electrode may have a backing 4a of energy absorbing material. After polarization, the transducer may be used to produce ultrasonic pulses for probing of the object 3. For optimum efficiency the thickness of the paste should be of the same order as the particle size, i.e. about half a wavelength. In order to obtain thin layers, paste 17, Fig. 5, may be smeared over the surface of the test object 18. An electrode 14 resiliently mounted in an insulating housing 15 may then be applied to any part of the smeared area.
Patent GB-444863-A (GB)
Title: Improvements in, or relating to, change-over switches for use in connection with cooking and other heating appliances
IPC: H05B1/02
Filed: 1934-06-22
Abstract: 444,863. Control systems for heating- resistances. SCHIELE & BRUCHSALERINDUSTRIEWERKE AKT.-GES., Baden, Germany, and CRABTREE & CO., Ltd., J., Lincoln Works, Walsall. June 22, 1934, No. 18441. Void [Abridged as open to inspection under Sect. 91 of the Acts, Dec. 24, 1934]. [Class 38 (iv)] [See also Group XXXVII] Switching control.-Heating-elements 1<a>, 1<b> of an electric cooker are connected through contact bridges 8, 9 of a change-over switch and a three-position switch 3 to the phase wires R, S and neutral O of a three-phase supply. With the change-over switch in the position shown, in position I of the switch 3 the elements 1<a>, 1<b> are in series across the phase wire R and neutral O to give low heat, while in position II only heater 1<a> is connected to give medium heat, and in position III the elements are in parallel to give full heat. In order to heat the elements rapidly the change-over switch contacts are pushed to the left to bridge contacts 4<a>, 4<b>, 6<a>, 6<b> and the elements are connected in parallel across phases R and S until thermal elements 12<a>, 12b are sufficiently heated to move a member 15 to move a latch 14 to release the toggle of the change-over switch which then moves to connect the elements between phase R and neutral O. The change over switch cannot be operated while the elements are fully heated. Specification 442,841, [Group XXXVII], is referred to.
Patent GB-838399-A (GB)
Title: Improvements in and relating to electric circuit breakers
Inventor: ATHERTON THOMAS GEOFFREY FENTO
IPC: H01H71/40
Filed: 1958-06-12
Abstract: 838,399. Automatic circuit-breakers. DORMAN & SMITH Ltd. June 12, 1958 [June 12, 1957], No. 18467/57. Class 38 (5). In a circuit-breaker, such as that of Specification 784,006, having bimetallic and electromagnetic overload tripping devices, the core 17 of the electromagnet is mounted on the bimetallic element 9 by means of a coil 16 which surrounds both the core and the element and acts as a heater for the element and as the energizing coil for the core.
Patent GB-143098-A (GB)
Title: Improvements in electrically operated diaphragm horns
IPC: G10K9/10
Filed: 1919-07-25
Abstract: 143,098. Bradbury, H. W. J uly 25, 1919. Diaphragm horns.-In an electrically-operated horn, the diaphragm-clamping ring A is made in one piece with three standards B, which carry a frame C containing one of the bearings for the armature spindle D<1>. The other bearing is formed in a frame C' secured to the magnet E and the frame C. The striking-wheel D<2> is carried by, or formed on the motor armature.
Patent GB-477843-A (GB)
Title: The manufacture of new polymerisation products
IPC: C08G65/22
Filed: 1936-07-03
Abstract: Oily to resin-like polymerization products are obtained by treating with a small amount of a Friedel-Craft's catalyst a compound of the formula <FORM:0477843/IV/1> in which R and R1 stand for hydrogen or alkyl groups and X stands for a radicle which is free from reactive hydrogen atoms, that is, a radicle which is unable to react with ethylene oxide groups.  Thus, X may stand for hydrogen, <FORM:0477843/IV/2> (R2 and R3 being alkyl or aryl).  Mixtures of several of the materials above defined, or of these with other reactive oxides, such as ethylene oxide or glycide, may be polymerized. Polymerization may be effected in the presence of an inert solvent, e.g. aliphatic or aromatic hydrocarbons or halogenated aliphatic hydrocarbons.  The reaction temperature varies from -25 DEG C. to the boiling point of the starting material or solvent, polymerization being preferably started at low temperature, the temperature being raised towards the end of the reaction.  The catalysts are employed in quantities up to 10 per cent.  In examples: (1) epichlorhydrin and a small quantity of borofluoride acetic are reacted with stirring and cooling, the temperature rising to 30--50 DEG  C.  The viscous oil is taken up in a solvent, e.g. carbon tetrachloride and stirred for some hours at 50 DEG  C. with caustic soda and tonsil.  Insoluble portions are separated and the solvent is distilled off leaving a thick oily polymerizate.  Tin tetrachloride or aluminium chloride may be used in place of the borofluoride acetic acid; (2) epichlorhydrin is dissolved in carbon tetrachloride, and a few bubbles of gaseous boron fluoride are passed in while cooling and stirring, whereupon polymerization sets in.  After cooling, a few more bubbles of boron fluoride are passed in, and this operation is repeated until the required degree of polymerization is reached.  The boron fluoride is removed by treatment with alkaline substances, and the solvent distilled off, a sticky resin being obtained; (3) 1-phenoxypropene oxide-2.3 is polymerized with boron fluoride as in examples 1 and 2, without solvent or dissolved in benzene, chloroform, &c.  If no solvent is used, a yellow oil is obtained; (4) a mixture of epichlorhydrin and glycide in any proportion is polymerized as in example 2; (5) 1--3 per cent of boron fluoride is passed into diethylaminoepihydrin and the whole is heated for some hours at 70--90 DEG  C.  The polymers may be used as softening agents, e.g. for acetyl cellulose, as thickening agents, or as intermediates in the preparation of other compounds; for instance, halogen atoms contained in the molecule may be reacted upon by bases, and the compounds thereby obtained are capable of increasing the affinity of materials for acid wool dyestuffs. Specification 354,992* is referred to.
Patent GB-909629-A (GB)
Title: Improvements in or relating to gas cleaning apparatus
IPC: B01D46/02
Filed: 1961-05-23
Abstract: 909,629. Gas filters. RESEARCH-COTTRELL Inc. May 23, 1961 [June 1, 1960], No. 18559/61. Class 8(2). Gas cleaning apparatus comprises a housing 10, Fig. 1, having a dirty gas inlet 24 and a clean gas outlet 40, a plurality of double walled filters 44 disposed within the housing and including concentric inner and outer bags 46 and 48, Fig. 5, which are suspended within the housing, and non rigid means such as springs 90 for maintaining a spaced relationship between the inner and outer bags during operation of the apparatus. The housing 10 has an upper chamber 18 separated from a lower chamber 20 by apertured header plates 16 to which are attached the filters 44, and the housing is divided by vertical walls 22 into four separate units each having a bottom hopper 14. There are two gas inlets 24 each having separate ducts respectively leading to a pair of the separate units, Fig. 2 (not shown), each duct which may be provided with distribution vanes has at their lower ends closure members 28 for selective control of the gas flow. The gas outlet 40 is led from a well 34 disposed at the top of the housing, the well having openings 36, Fig. 3, leading respectively from the separate units of the housing. Mounted on the well 34 is a blower 94 having an outlet 104 leading to a rotatably mounted duct 106 to which is attached a collapsible fabric assembly 114, the duct 106 being adapted to be selectively positioned to supply gas or clean air drawn by the blower through valves 102 or 100 to any one of the separate units of the housing. The duct 106 during normal oepration of the apparatus, is positioned between adjacent openings 36. A control system is provided which, when the pressure drop across the filters exceeds a preselected limit, rotates the duct 106 to position it opposite the openings 36, in rotation, and appropriately switches on and off the blower 94. The control system also operates the closure members 28, the latter being repeatedly opened and closed to set up a " puff " action in the filter bags to facilitate the cleaning thereof. The assembly 114 is provided with a forming ring 116 to which is attached springs 118 and a slitted section 120 for seating against the openings 36, In a second embodiment, Fig. 6 (not shown), the springs 90 are each replaced by a plurality of shorter springs the ends of which are connected to the ends of adjacent springs by ring connectors. In a third embodiment, Figs. 7 and 8 (not shown), the springs 90 are replaced by a plurality of vertically spaced corrugated annular members interconnected by fabric webbing. The filters 44 are preferably held against swaying by a structure 29 comprising a first set of spaced parallel rods which are welded to a second similar set of rods disposed at right angles to the first set. Alternatively, the filters may have weights disposed therein or may be connected by springs to a bar traversing the housing.
Patent GB-953066-A (GB)
Title: Improvements in or relating to magnetic drive systems
Inventor: SORENSEN VIGGO HENNING
IPC: H02K11/00
Filed: 1960-05-25
Abstract: 953,066. Electromagnetic couplings. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. May 17, 1961 [May 25, 1960; July 19, 1960], Nos. 18580/60 and 25202/60. Heading H2A. [Also in Division F2] In a magnetic hysteresis clutch, one rotatable member 3 is provided with two sets of interdigitating polepieces 7a, 8a extending from two magnetically separated rings 7, 8 towards the other rotatable member 11. The two rings 7, 8 are separated by a non-magnetic ring 4, and are rigidly mounted on member 3 which is carried on drive shaft 1. The polepieces are energized by a fixed coil 14 which surrounds the ring assembly. The other member 11 comprises a ring 12 of a high magnetic hysteresis material, e.g. an aluminium, nickel, cobalt alloy which has been processed to exhibit a preferential magnetic axis in a radial direction, mounted on a mild steel hub keyed to shaft 10. According to the first Provisional Specification, the hub may comprise laminated discs. Between the coil 14 and the outer easing, a signal coil 18 may be included which produces an output proportional to the speed of slip occurring if excessive torque is applied. Two such clutches 26, 27, Fig. 4, may be incorporated into a two-speed gear-box (see Division F2), the arrangement being such that if clutch 27 is energized there is a direct drive between shafts 23, 25, and if clutch 26 is energized the drive is through the reduction gearing 33, 34, 35, 36. Both clutches may be energized to give a higher torque at low speed.
Patent GB-864130-A (GB)
Title: Improvements in and relating to polymers
IPC: C08F214/26
Filed: 1958-06-12
Abstract: 864,130. Perfluorocarbon polymers. DU PONT DE NEMOURS & CO., E. I. June 12, 1958 [June 12, 1957], No. 18750/58. Class 2(6). A process for preparing perfluorocarbon polymers comprises contacting, at at least 0‹C., tetrafluoroethylene, or a mixture of at least 20 molar per cent thereof with a C  3-10  perfluoroolefine having a terminal difluoromethylene group, with a catalytic amount of a metal fluoride wherein the metal has a higher oxidization potential than mercury and is present in its highest valency state. Such metals (and their fluorides) are chromium (trifluoride), manganese (trifluoride), cerium (tetrafluoride), lead (tetrafluoride), bismuth (pentafluoride), cobalt (trifluoride) and silver (difluoride). The amount of catalyst may be 0À1 to 50, preferably 0À5 to 5 molar percent. The preferred temperature range is 15 to 150‹C. The reaction may be carried out with the monomer and catalyst alone in a sealed vessel at the autogeneous pressure e.g. up to 200 atmospheres but it is preferred to use an inert diluent which is a solvent for at least one of the monomer and catalyst to an extent of at least 5% at 25‹C. Suitable diluents are fluorine containing liquids e.g. hydrogen fluoride, arsenic trifluoride, antimony pentafluoride and fluorocarbons containing an aliphatic radical and free from aliphatic unsaturation such as perfluoro-dimethylcyclohexane, -toluene, -ethylcyclopentane, -n-octane, and -n-decane. The diluents may be used in amounts of 0À5 to 20 parts by weight per part of catalyst. The perfluoroolefins which may be copolymerized with the tetrafluoroethylene have the general formula CnF 2 n, where n is at least 3 and not more than 10, especially those of the formula F-(CF 2 )m-CF=CF 2  where m is an integer from 1 to 8 e.g. hexafluoropropene-1, octafluorobutene-1, dodecafluorohexene-1, hexadecafluoroheptene-1 and eicosafluorodecene-1. Examples describe the polymerization of tetrafluoroethylene with lead, silver and cobalt fluorides in arsenic trifluoride; with cobalt trifluoride in liquid hydrogen fluoride and in perfluorodimethylcyclohexane; and the copoperfluorodimethylcyclohexane; and the copolymerization of tetrafluoroethylene and hexaflucropropene with silver difluoride in arsenic trifluoride. The products were purified by extraction with acetic, hydrochloric and nitric acids.
Patent GB-237902-A (GB)
Title: Improvements in and relating to welding electrodes
IPC: B23K35/22
Filed: 1925-07-23
Abstract: 237,902. British Thomson-Houston Co., Ltd., (Assignees of Gillette, R. T.). July 30, 1924, [Convention date]. Metals, powdered, obtaining coherent masses from. - Electrodes for resistance welding are made of a mixture consisting of 9 parts by weight of finely divided copper consolidated by pressure to form a coherent body and fired in a hydrogen atmosphere at a temperature of 1200- 1600‹ C. In a modification, the powdered tungsten is fashioned to the required shape in a press and is then partially sintered at 1500‹ C. in a hydrogen atmosphere. The mass is then placed in a graphite box with an excess of copper and heated to 1300‹ C. in a hydrogen atmosphere, the copper filling the voids in the porous mass of tungsten. The excess copper is removed by machining.
Patent GB-350251-A (GB)
Title: Improvements in or relating to steam or like separators
IPC: F22B37/30
Filed: 1930-06-19
Abstract: 350,251. Steam &c. separators. BLAW-KNOX, Ltd., New Oxford House, Hart Street, London.-(Blaw-Knox Co. ; National Bank Building, 5th Avenue, Pittsburg, U.S.A.) June 19, 1930, No. 18787. [Class 123 (iii).] Steam or like sepaators having a liquid chamber, a drain-pipe connected to the bottom of the liquid chamber and a vent pipe connecting the drain-pipe and liquid chamber, have a closure for one end of the liquid chamber comprising a vertical plate with an opening communicating with the interior of the chamber and the upper end of the vent pipe. A separator comprises a number of sections 14 with open sides having baffles 11, a water passage 12 and a drain pipe 13 communicating with a manifold drain 15. An endplate 27 having steam and water openings 29, 31 is secured to each section and in the form shown a plate 28 is also fitted which closes the end section. An inlet in the plate to which a vent pipe 25 is connected leads to passages 35 communicating with the openings 31. The passages 35 are raised slightly above the water passage to prevent clogging of the vent pipe. The endplates 27, 28 may be made integral.
Patent GB-365485-A (GB)
Title: Improvements relating to chimneys, ventilators, silencers and the like
IPC: F23L17/02
Filed: 1931-06-30
Abstract: 365,485. Silencing gaseous currents. MELMORE, W. M. and FLUID PRESSURE PUMPS, Ltd., of Clifton Street Works, Notting Hill, London. June 30, 1931, No. 18864. [Class 7 (ii).] In a silencer a vacuum is created at or around the outlet duct 1 and a draught is induced through the duct by means of the passage of air through an outer bell-mouthed tapering venturi conduit 2 having its outlet 3 directed outwardly and shielded by the inlet wall of the conduit, radial distancepieces 3a being provided in the conduit to prevent eddies and the outlets being protected by a domed top 11.
Patent GB-718470-A (GB)
Title: Improvements in textile fibre drafting mechanisms
IPC: D01H5/26
Filed: 1952-07-25
Abstract: 718,470. Textile drafting apparatus. SACO-LOWELL SHOPS. July 25, 1952 [Aug. 30, 1951], No. 18902/52. Class 120(2) Double apron drafting mechanism having a long, lower, tensioned apron and a short upper one has a cradle for the upper, apron consisting of two side pieces, a crossmember forming an upper apron tensor and means for vertically spacing the forward end of the cradle from the lower apron guide bar. The cradle consists of two side members 40 fixed to a crossmember 42 and carrying legs 46 that rest upon the lower apron bar 24. towards which they are.urged by a spring 48 mounted on a weighting saddle 38. Recesses 44 are provided in the side members 40 to receive the arbor 36 of the upper apron roller, the boss 34 of which is mounted on anti-friction bearings. It is preferred that the upper apron 30 should prciect forwardly of the lower apron 20 as it passes over the bar 24.
Patent GB-742554-A (GB)
Title: Improvements relating to high-voltage instrument transformers
IPC: H01F38/30
Filed: 1953-07-09
Abstract: 742,554. Transformers. REYROLLE & CO., Ltd., A., and MOSER-GLASER & CO., AKT.-GES. July 9, 1953 [July 15, 1952], No. 19125/53. Class 38 (2). A high voltage transformer has current transformer windings at least partly embedded in a closed end of a hollow synthetic resin insulating member of tubular shape, the insulating member having potential gradient control means at least partly embedded in the walls of the' insulating member. A synthetic resin insulating body 1 has the core 5 and the primary and secondary windings 3, 6 of a current transformer embedded in the closed end of the insulating member. The potential gradient control means is formed by the secondary winding 8 of a potential transformer, the core 10 of which is housed in the bore of the insulating member, the primary winding 11 of the potential transformer being wound around the core 10, the core being flanged at the bottom end to reduce the length of the air part of the magnetic circuit. The insulating member is provided with electrically conducting coatings 12, 13 the the outer 12 of which is connected to the end of the secondary winding 8 of the potential transformer. Weathersheds 9 are provided which may be integral with the insulating member 1. The potential gradient control means may alternatively comprise overlapping eylindrical condenser plates embedded in the walls of the member 1 or a series of high ohmic resistor so embedded may be used. Various embodiments of the current transformer assembly are described having either or both of the primary and secondary windings embedded, the core' projecting into a transverse hole in the closed end of the insulating member, or the primary winding may be of a straight through bar-type. The insulating member is preferably manufactured by a centrifugal casting process forming the subject of Specification 742,413.
Patent GB-1395456-A (GB)
Title: Ignition system for internal combustion engines
IPC: F02P3/01
Filed: 1973-04-19
Abstract: 1395456 Ignition systems TEXACO DEVELOPMENT CORP 19 April 1973 [19 June 1972] 19166/73 Heading F1B An ignition system providing controlled duration continuous-wave high frequency spark energy for the ignition of an internal combustion engine comprises an oscillator (not shown) for generating the spark energy and having a control winding (oscillator start stop winding) for starting and stopping oscillation thereof at the beginning and end of each spark interval, switching means 60 for instantaneously opening and closing a loading circuit for the control winding at the beginning and end of each spark interval and engine timed means 28 for actuating the switching means in predetermined relation to the engine operation as shown the switching means comprises an electronic switch (transistor 60) circuit means for connecting the engine timed means to the electronic switch and including a regenerative trigger means and time delay means for closing the electronic switch after a predetermined interval, if the engine timed means has stopped before the beginning and end of a spark interval. The time delay means comprises a retriggerable monostable multi-vibrator 41 and the circuit means also comprises a NAND gate 45 having at least two inputs one from the multivibrator and one from the trigger means and a circuit connection from the trigger means to an input of the multi-vibrator. As shown the engine timed means comprises an infrared light-emitting diode 29 a photo transistor 30 and a shutter 31 driven by the engine. In a modification the engine timed means comprises a contact breaker. In another modification the system includes a relay, an ignition switch and circuit means for connecting the relay to the control winding for stopping the oscillator whenever the ignition switch is turned off. Specifications 1364009, 1372956 and 1389962 are referred to.