baber/WOPTO huggingface dataset:
Patent GB-1532797-A (GB)
Title: Drive circuits for direct current electric motors
IPC: H02P7/282
Filed: 1975-11-04
Abstract: 1532797 Control of DC motors LANSING BAGNALL Ltd 25 Oct 1976 [4 Nov 1975] 45785/75 Heading H2J An electric drive circuit comprises a D.C. motor (series motor 5 in Fig. 1) having two parallel oppositely-wound field windings 3, 4, each connected in series with a respective controlled rectifier (thyristors 7, 8), a commutating capacitor 9 and a signal generator (astable multivibrator 15) for applying gating signals to the rectifiers alternately for causing D.C. to flow through the windings 3, 4 in alternate complementary conduction periods so that, with equal complementary conduction periods and a sufficiently high frequency of the gating signals, the motor is stationary and the transformer action of the windings 3, 4 maintains low winding currents and inhibits overvoltages across the thyristors. Rotation in one or other direction at a desired speed is produced by appropriate complementary variation of the mark/space ratios of the gating signals, each thyristor when fired discharging capacitor 9 to extinguish the other. The voltage and current limiting function of choke 14 may be performed by the armature 5, Fig. 2 (not shown), and winding currents at standstill may be further reduced by connecting the windings of a transformer in series with the field windings.
Patent GB-1489585-A (GB)
Title: Portable breathing apparatus
IPC: A61M15/02
Filed: 1974-10-23
Abstract: 1489585 Portable breathing apparatus P GUICHARD 23 Oct 1974 [24 Oct 1973 28 Dec 1973] 45796/74 Addition to 1441958 Heading A5T In a breathing apparatus according' to Specification 1441958 there is disposed in a container C" an aerosol 3', an atomiser 3" or oxygen storage vessel (not shown), and a filter cartridge 7' so that air is passed through the cartridge and receives balsamic or medical products from the aerosol or atomiser. A piece of magnetised rubber 6' and an impregnatable felt pad may be disposed in the path of the air from the filter. The aerosol 3' and atomiser 3" have respective valve actuators 26 and 52 operated by relative movement of respective bodies 22 and 22" to the actuators, the movement being by respective pushbuttons 4' and 4" which either are pressed to open the valve and pressed again to close it or are pressed once and the valve remains open for a predetermined period of time. The container C" has a body part and a hinged cover, Fig. 2 (not shown), and air is drawn in to the filter through apertures in the cover, a seal being provided between the cover and the filter so that no air by-passes the filter. The atomiser 3" may be replaced by the oxvgen storage vessel containing pure medical oxygen under pressure.
Patent GB-1207394-A (GB)
Title: Electronic circuit arrangement for measuring statistical parameters of stochastical processes
IPC: G01R29/00
Filed: 1967-10-06
Abstract: 1,207,394. Selective signalling. NORMA FABRIK ELEKTRISCHER MESSGERATE G.m.b.H. 6 Oct., 1967 [6 Oct., 1966], No. 45810/67. Heading G4H. [Also in Division G1] A device is described for measuring various statistical parameters of a stochastic process represented by an electrical waveform. A stochastical process is a process that is subject to random variations, due for example to machine tolerances-such a process may be the continuous production of wire which should be of a nominal diameter, but of which the actually diameter varies in a random manner about the nominal diameter, and is illustrated in Fig. 2a. In the basic embodiment, Fig. 1, the stochastic wave 1 is repeatedly sampled 2 by clock pulses 3 and each sample is compared 4a, 4b with two reference potentials U sa , U sb  so as to mark firstly either none, one or both of two leads X, Y, and then, via a logic circuit 6 (Fig. 3, not shown), one of three leads A 1 , A 2 , A 3 , in accordance with the range in which the sample lies. Thus a sequence of pulses occurs on each of the leads A 1 , A 2 , A 3 , each pulse indicating that the sample then being taken lies in the associated range. The Specification considers how to derive from these signals measures of various statistical parameters, and the simplest of these are the three " total probability " measures P 1 , P 2 , P 3 , each of which gives the probability that a sample chosen at random will lie in the associated range. Thus, if for example, P 2  has a value of 0À75, then the probability of a sample selected at random lying in range 2 is 0À75. Clearly, since a sample must lie in one of the three ranges, P 1 +P 2 +P 3  = 1. The value of P 2 , for example, is obtained by applying the pulses A 2  to a trigger which is reset regularly by clock pulses, and then by integrating in either an analogue or a digital manner, the resulting uniformly shaped pulses, so as to obtain a measure of their average frequency. The more complex parameters include joint probabilities, such as P 13  for example, which is the probability that two consecutive samples will lie in ranges 1 and 3 in that order. This probability is evaluated (Fig. 5, not shown) in a similar manner by gating one-bit delayed A 1  pulses with A 3  pulses, and shaping and integrating the resulting pulse train to obtain a measure of its average frequency. The Specification also refers to the autocorrelation function and the power spectral density. If a stochastic wave consists of random variations superimposed upon a known signal, for example a signal, Fig. 9, having three different levels, then in order to analyse the random fluctuations either the known signal with no fluctuations can be subtracted from the stochastic wave, or the threshold levels in the system described above can be adjusted in accordance with the average signal level taken over an appropriate period (Fig. 8, not shown).
Patent GB-1506474-A (GB)
Title: Apparatus for the thermal protection of a reactor core
IPC: G21C15/12
Filed: 1975-11-04
Abstract: 1506474 Nuclear reactor shielding COMMISSARIAT A L'ENERGIE ATOMIQUE 4 Nov 1975 [14 Nov 1974] 45811/75 .Heading G6C In an integrated liquid metal cooled fast reactor, protection of the upper portion of main reactor vessel wall 8 is effected by diverting part of the cold liquid metal along the passage between wall 8 and flow-reversing baffle plate 34, thence between plate 34 and counter-baffle 38, and ensuring that the temperature and pressure of inert gas trapped in chamber 58 is such that liquid metal level 60 is always below flow reversal point 36, whereby stagnant liquid metal above flow reversal point 36 is always thermally insulated from hot liquid metal within primary reactor vessel 25. As shown in Fig. 3A, this is achieved by having the chamber 58 closed, except where it is penetrated in gastight fashion by tubes'62 provided with valves 64, these permitting adjustment of level 60. When chamber 58 is closed, diaphragm 33, required in prior arrangements, may be dispensed with, the resulting lowering of the stagnant metal level improving temperature distribution along the vessel (Fig. 3B, not shown). The temperature and pressure of inert gas within chamber 58 for particular operating conditions of the reactor may be that of the blanket 18 of inert gas at the top of the reactor vessel, and in alternative embodiments, chamber 58 may be normally in communication with this blanket. As shown in Fig. 5, chamber 58 is formed by counter-baffle 38 and shell 39 joined thereto, the bottom of shell 39 limiting the rise of liquid metal into chamber 58. A feature of this arrangement is the separation of chamber 58 from primary reactor vessel 25. In a comparable embodiment (Fig. 4, not shown) chamber 58 is closed except that a dip tube open at both ends leads into it from inert gas blanket 18, the level of the bottom of the dip-tube determining the upper level of liquid metal in chamber 58.
Patent GB-1103015-A (GB)
Title: A roof structure and a method of constructing a roof
Inventor: BEST JOHN SAWYER
IPC: E04D13/16
Filed: 1966-10-13
Abstract: 1,103,015. Roof structure. DOW CHEMICAL CO. 13, Oct., 1966 [14, Oct., 1965], No. 45871/66. Heading E1W. A water impermeable membrane 26 comprising a plurality of layers of bituminous adhesive and roofing felt on the upper surface of a roof deck 21, is covered by a layer of closed cell, water impermeable cellular thermal insulation 32 having on its upper surface a protective layer 35. The thermal insulation may be a foamed synthetic resinous material or foamed glass. The protective layer may comprise gravel or an inorganic mortar.
Patent GB-1483295-A (GB)
Title: Sheet stripping device
IPC: G03G15/00
Filed: 1974-10-25
Abstract: 1483295 Delivering sheets XEROX CORP 25 Oct 1974 46240/74 Heading B8R Sheets 35 are stripped from a xerographic drum 22 by a flexible filament means 10 arranged at an angle to the direction of movement of the sheet and having at least part of its length in contact with the drum surface 20, so as to engage under the sheet at the corner 35 and progressively along the leading edge 34. The filament is tensioned by a spring means, and the tension may be controlled or the filament moved away from the surface under the control of a cam rotating in synchronism with the drum. A plurality of filaments may be provided, parallel to each other or at angle, e.g. two filaments may cross each other and each engage the sheet first at opposite corners of the front edge.
Patent GB-1247933-A (GB)
Title: Improvements in or relating to non-reciprocal four-terminal networks
IPC: H03H7/00
Filed: 1968-09-30
Abstract: 1,247,933. Non-reciprocal networks. SIEMENS A.G. 30 Sept., 1968 [29 Sept., 1967], No. 46261/68. Heading H3U. A non-reciprocal network switch as an isolator comprises a gyromagnetic element having, on one side, crossed line conductors fed in phase quadrature from a common source and, on the other side, a planar conductor stated to act as a reflector, the element being subject to a magnetic bias field. The drawings show a symmetrical arrangement in which two ferrite elements 3, Fig. 2, are arranged between conductive plates 2. Moulded between the elements 3 is an insulating plate carrying, on each side, two sets of parallel straight conductors A, B, Fig. 3, running at right-angles to each other, and formed e.g. by printed-circuit technique. Each set forms in conjunction with one of the reflecting plates 2 an inductance and the inductances are connected in circuit with capacitances in a network, Fig. 1 (not shown), such that they carry currents in phase quadrature. The arrangement is completed by a magnetic yoke 1, 5. Several networks may be stacked one above the other.
Patent GB-1137399-A (GB)
Title: A hydraulic actuator mechanism
IPC: F15B11/00
Filed: 1966-10-19
Abstract: 1,137,399. Bowl scrapers. GENERAL MOTORS CORP. 19 Oct., 1966 [22 Oct., 1965], No. 46746/66. Heading E1F [Also in Divisions F1, F2 and G3] The bowl, [16, Fig. 1, not shown] of a scraper vehicle is raised or lowered by two piston and cylinder mechanisms, 28, 34, Fig. 2 there being one such mechanism on each side of the bowl and each being actuated by a valve 67. Upon placing a control lever 37, Fig. 2 in "raise" position, fluid at pressure is supplied from a tank 44 to an inlet 56 from where it enters duct 58, raises a check valve 60 and finally passes into duct 62 connected to the piston side of the mechanism 28, thereby forcing the piston outwardly which in return raises the bowl. Some of the pressurised fluid also enters duct 82 and is passed, via chamber 90, aperture 102 duct 104, and line 70 to a closed control valve, 66, Fig. 2. If the lever is moved to a "lower" position, this opens the control valve, by moving it to the right so allowing fluid from duct 104 and line 70 to pass through it and into line 76 and duct 130, which fluid then acts on piston 96 forcing it to move to the right as shown in the drawing. This motion raises, by means of member 98, poppet valve 94 from its seat thereby bringing chamber 90 into communication with duct 91. In this state, fluid from the piston side of the mechanism enters duct 62 and passes, via duct 82, chamber 90 and further duct 91, into the tank, so allowing the piston to enter the cylinder as a result of gravity acting on the bowl, the bowl thus being lowered. A tapered pin 128, firmly secured to the valve end cap 126, engages a stepped bore 120 within the piston, which bore communicates with chamber 92 and allows a predetermined amount of liquid to pass through bore 120. The poppet valve can thus assume a plurality of stable positions between its fully opened and fully closed position, each of which corresponds to a specific rate of motion of the bowl. The control valve, operated by a linkage 64 between itself and the lever comprises an axial bore having a landed valve spool 136 therein, the spool being of such shape that its position determines the degrees of communication between duct 74 and 76 and hence the position of the piston 96.
Patent GB-1169320-A (GB)
Title: Drinking Straw
Inventor: DIETZ JOHN FREDERICK
IPC: A47G21/18
Filed: 1968-10-09
Abstract: 1,169,320. Drinking straws. J.F. DIETZ and F.E. DIETZ. Oct.9, 1968 [Dec.4, 1967], No.47882/68. Heading C6E. A drinking tube 10 fabricated in cellulose acetate has a middle portion 13 wherein the tube follows a tertuous path around one of the straight portions 11 or 12.
Patent GB-1524677-A (GB)
Title: Burner assembly for an inlet manifold of an internal combustion engine
IPC: F02N19/06
Filed: 1974-11-06
Abstract: 1524677 Burner air supply LUCAS INDUSTRIES Ltd 30 Oct 1975 [6 Nov 1974] 47951/74 Heading F4T A burner assembly comprises a hollow body 10 adapted to be mounted in the inlet manifold of an internal combustion engine for heating air, and a fuel sprayer 15 arranged to discharge fuel into a combustion zone 14 within the body 10, the body having a plurality of inlets 23 at one end and a plurality of outlets 26 at the opposite end, and baffles 19 within the body so arranged that air entering the inlets is constrained to enter the combustion zone 14 before reaching the outlets, which communicate directly with the combustion zone. The body 10 comprises coaxial annular casings 11, 12 together defining an air passage 13, the combustion zone being within the inner casing 12. The baffles 19 divide the passage 13 into two series of compartments 20, 21, the inlets 23 communicating with the compartments of the series 20 and the outlets 26 with those of the other series 21; two series of apertures 27, 28 respectively through the upstream and downstream ends of the inner casing 12 connect the combustion zone 14 with compartments of the series 21, 20 respectively. The outlets 26 are formed as openings in an end wall 24 which coincide with the compartments of the series 21 and extend across the end of the combustion zone 14.
Patent GB-1384718-A (GB)
Title: Loudspeaker diaphragm
IPC: H04R31/00
Filed: 1972-05-30
Abstract: 1384718 Loud-speaker diaphragms MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd and SEKISUI KAGAKU KOGYO KK 30 May 1972 [5 July 1971 12 July 1971] 48377/73 Divided out of 1384716 Heading H4J A loud-speaker diaphragm of foamed plastics material has at least one coating, on at least one face, applied as an aqueous emulsion of a resin. The resin may be polyvinyl acetate, polyvinyl chloride, polystyrene or acrylic resin. Alternatively rubber resin such as butadiene-styrene rubber or butadiene-acrylonitrile rubber may be used. The foamed plastics material may be as described in Specification 1,384,716. The foamed plastics material may be immersed in the aqueous emulsion of resin or the resin sprayed in atomized form on to or brush on the foamed plastics material. A frusto-conical diaphragm is either pressed from a sheet of the foamed plastics material previously coated with resin or the frusto-conical diaphragm is first formed and then coated with resin.
Patent GB-1304139-A (GB)
IPC: B60Q1/44
Filed: 1971-10-19
Abstract: 1304139 Road traffic signals on vehicles REXROTH UND SZEKESSY ENTWICKLUNGS GmbH 19 Oct 1971 [19 Oct 1970 15 March 1971] 48543/71 Heading G4Q [Also in Division H3]  A vehicle brake light circuit includes a modulator (see Division H3) which varies the voltage applied to the brake lights when the brake switch is first closed, so that the intensity of the brake lights varies in waves or pulses for an initial period and then stays constant. The modulator may also include an adjustable inertia switch which operates on deceleration caused by hard braking to produce voltage variations which may be of different frequency and/or amplitude from those produced at the commencement of braking.
Patent GB-1241009-A (GB)
Title: Walking beam conveyor
Inventor: CONE CARROLL
IPC: F27B9/20
Filed: 1968-10-14
Abstract: 1,241,009. Walking beam conveyers for furnaces. MIDLAND-ROSS CORP. 14 Oct., 1968 [26 Feb., 1968], No. 48567/68. Heading F4B. In a furnace 20 incorporating a walking beam conveyer having a fixed set of tubular rails 64 and a reciprocable carriage 100 with a movable set of rails 94 for intermittently and alternatively holding and conveying a series of slabs, blooms or billets 80 during their passage through the furnace, said carriage is mounted on a pair of parallel girders 102 vertically reciprocated by six eccentrics 160 and is driven longitudinally by a pair of crank-shafts 204 through connecting rods 220. The eccentrics 160 are driven in unison from a single electric motor through a series of right-angle drives 164, main shafts 170, pinions 166 and ring gears 168. Another motor drives the crank-shafts 204 through a drive train including pinion gears 210 and ring gears 208. The rails 64 are supported by tubular columns 62 with end columns 62<SP>1</SP>, 62<SP>11</SP> formed by extensions of said rails, cooling water being supplied by columns 62<SP>1</SP> and taken off by columns 62<SP>11</SP>. Elbow pipes extending down the columns 62 divert water therethrough (Fig. 8). Rails 94 are similarly supported by columns 92 which extend through slots 96 in the furnace hearth 26 formed with skirts 122 depending into longitudinal water troughs 124 to form seals. The rails 64 and 94 are covered with refractory and formed with pads 82 supporting the workpieces 80. Fixed paddles 136, 138 in the reciprocated troughs 124 urge scale into an accumulator 140 at the end of each trough 124. Each accumulator is flushed by operating a pneumatic motor 142 lifting a plunger 144 with a plug 146 to allow scale and water to escape into a discharge trough 152. At the top of the plunger stroke a closure member 150 shuts off the flow of water. Workpieces 80 are pushed on to an entry table 234 by a ram 232 and extractor arms 236 reach into the furnace and serially lift them on to an extractor table 238. The furnace has upper burners 50 and lower burners 52 in the side walls which also have flue ports opening into a valve-controlled chimney 54 at each side.
Patent GB-1450570-A (GB)
Title: Method for pulling a pipeline from a strip of land into an  adjacent body of water
IPC: E02F5/10
Filed: 1973-10-18
Abstract: 1450570 Laying pipes SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 18 Oct 1973 [20 Oct 1972] 48631/73 Heading A1B [Also in Division F2] A soil, &c fluidizing apparatus for use in pipe laying (see Division F2) comprises parallel conjoined pipes 13, 15, Fig. 8, the latter having downwardly directed holes 18 fed under pressure with water or with water and air mixed via pipes 21, Fig. 6, so that the soil below is fluidized and allows the pipes to sink. Water, &c is then fed through pipes 16 to the pipes 13 and out through the horizontal holes 19, Fig. 7, in jets 20 to form a fluidized area 10.
Patent GB-1249984-A (GB)
Title: Improvements in or relating to liquid pressure devices
Inventor: ROBERTS GEORGE WAVELL
IPC: F04B11/00
Filed: 1967-10-26
Abstract: 1,249,984. 249, 984. Reciprocating pumps. G. W. ROBERTS. Jan.20, 1969 [Oct.26, 1967], No.48673/67. Heading F1A. In an oil pressure pump the ratio of the swept volume 14 to the unswept volume 11 is such that the device may be operated with no output of liquid from the device at any time and the swept volume may be compressed into the unswept volume. The pump has a reservoir 9 forming a continuation of the cylinder 10 in which the piston 2 reciprocates. In a modification Fig. 2 (not shown) the piston 2 is furnished with a cross-bar 12 and loading springs 13. The unswept volume may be made variable by incorporating an adjustable piston in the bore 10 or reservoir 9; or alternatively pipes, cylinders, or containers can be located on the outside of the pump body providing there is a passageway between the pump and the reservoir. The pump may be of the multi-piston cylinder type.
Patent GB-1340665-A (GB)
Title: Indexing device
IPC: B23Q16/08
Filed: 1972-10-23
Abstract: 1340665 Indexing I ITO 23 Oct 1972 [1 Nov 1971 10 Jan 1972] 48673/72 Heading B3B An indexing device comprises a rotatable table 1 having one member 14 of a clutch arrangement, e.g. a pair of dog clutch members with oppositely facing teeth, fixed to its underside and the engaging member 8, 10 fixed to a diaphragm 6 (e.g. of metal) rotationally fixed to the base 4 such that on introduction of pressure fluid to a closed chamber 12 under the diaphragm the dogs engage and the table is immobilized. The clutch arrangement may alternatively be a cone clutch (Figs. 5-7, not shown). The table shown is rotated from a drive gear (not shown), via gear 5 and shaft 2. The release of the clutch is aided by springs and by the introduction of fluid into a closed chamber 16 above the diaphragm.
Patent GB-1335117-A (GB)
Title: Gas-liquid contact columns
IPC: B01J19/30
Filed: 1971-10-20
Abstract: 1335117 Treating gases with liquids; coated product SULZER BROS Ltd 20 Oct 1971 [23 Oct 1970] 48745/71 Headings B1F B1R and B2E A packing with improved wetting properties in a gas/liquid contact column comprises a metal substrate having a coating of a flame sprayed or plasma sprayed layer of metallic and/or ceramic compounds. The coating may be of the oxides, carbides, nitrides, borides and sulphides of metals and metalloids of Groups III-V, e.g. aluminium, zirconium, titanium, boron, silicon, germanium, arsenic and antimony and may be aluminium oxide or zirconium oxide, or may be a mixture of nickel titanium alloy and titanium carbide, or nickel chromium alloy and chromium carbide. The substrate may be of stainless chromium nickel steel and may be in the form of a strip or a fabric woven from wires. Specific examples of the formation of different packings are given.
Patent GB-1080758-A (GB)
Title: Improvements in or relating to rotary duplicating machines
IPC: B41L11/00
Filed: 1964-12-02
Abstract: 1,080,758. Rotary duplicating machines. G. RITZERFELD. Dec. 2, 1964 [Dec. 4, 1963], No. 48918/64. Heading B6C. A rotary duplicating machine, Fig. 1, of the type having a printing cylinder 1 and an impression roller 10 adapted to co-operate under the control of an electrical circuit arrangement, Fig. 5 (not shown), to print selected lines of text in a printing cycle, is provided with a sensing device, Fig. 3, arranged to pre-set the circuit in response to a printing programme on a punched card 112 before the printing cycle commences. Each punched programme card is located in turn between a contact plate 104 provided with conductors 105 and a support plate 109 provided with a plurality of contact pins 113. Rotation of a plate 100 forces the plate 104 and the card 112 towards the pins 113 by cam and wedge action; the pins opposite holes closing contacts in the switching arrangements. As an arm 35 rotates in synchronism with the cylinder 1, switches are successively closed by a roller 71 thereon but an electromagnet 28 is only energized to effect printing on closure of the switches for which the corresponding contacts have been closed by the sensing device. The roller 10 is swung towards the cylinder 1 on energization of the solenoid 28 the armature of which acts upon toggle levers 16, 17. The contact pressure of the roller and the cylinder is adjusted by movement of levers 9, 13, a link 12, and a locking rail 14, the lever 13 acting to rotate an eccentric shaft 15 on which the toggle lever 16 is mounted.