baber/WOPTO huggingface dataset:
Patent GB-1507670-A (GB)
Title: Manufacture of compact nuclear fuel bodies
IPC: G21C21/04
Filed: 1975-12-05
Abstract: 1507670 Nuclear fuel UNITED KINGDOM ATOMIC ENERGY AUTHORITY 5 Dec 1975 [6 Dec 1974] 52913/74 Heading G6C A compact elongated body of nuclear fuel is made by sequentially introducing portions of coated nuclear fuel particles 5 into an elongated cavity 2 and applying compacting tamping means 20 along the axis of the cavity after each introduction. The fuel particles have fission product-retaining coatings and also an overcoating of soft graphite and a binder, for example phenol-formaldehyde. The tamping means 20 may carry a resilient disc 21 so as to provide an uneven surface to form a key with the following layer of particles. The method may be used for filling elongated cavities in a graphite block, the block and compacted fuel particles being used in a nuclear reactor core after heating to carbonize the binder. An elongated nuclear fuel block with longitudinal passages for reactor coolant may also be prepared, Figs. 4-9 (not shown); in this embodiment the fuel particles are compacted in portions in a die between an upper ram provided with apertures and a lower ram carrying pins which engage with the apertures.
Patent GB-1284134-A (GB)
Title: Improvements in or relating to electronic time switches
Inventor: SCHARPENACK HERBERT
IPC: H03K17/288
Filed: 1969-10-29
Abstract: 1284134 Electronic relay-operating circuits SCHARPENACK & CO 29 Oct 1969 52976/69 Heading H3P An electronic time switch comprises a coldcathode or neon tube 4 in a relaxation oscillator circuit with a parallel capacitor 6 and a variable series resistor 3, to operate a relay 5, from an A.C. supply which is half-wave rectified at 1 but is unsmoothed, and a "make" contact 7 of the relay shunts the tube 4 and resistor 3. As shown, another "make" contact 8 shunts the tube only but in Fig. 2 (not shown) this is not used but a diode (9) permanently shunts the relay. Capacitor 6 charges via 3 until its voltage breaks down tube 4, thus energizing the relay, which is held in by contacts 7 until the next voltage zero.
Patent GB-1168365-A (GB)
Title: Apparatus for Mixing Building Materials which are difficult to Disperse
IPC: B28C7/02
Filed: 1967-11-22
Abstract: 1,168,365. Building material mixers; edgerunner mills. SCHLOSSER & CO. G.m.b.H. 22 Nov., 1967 [28 Nov., 1966], No. 53140/67. Headings B1C and B2A. Mixing. A pen-type apparatus for mixing a mortar has a mixing head 6 rotatable about the axis of the pen and carrying a plurality of counter-rotating rakes or beaters 20; four detachable and angularly adjustable mixing tools 9, 10, 18, 19 attached to beams 15 rotatable about a vertical axis 11; two radially adjustable shovels 22 caused on a transverse beam 23; and at least one scraper 24. The beaters 20 comprise two or more exchangeable depending bars of angular or corrugated cross-section (see Figs. 3 or 4, not shown), the speeds of the beater-driving motors 21 being adjustable. The apparatus may be fed by a batch-weigher 28 and hopper 27. In the manufacture of a sand-lime mortar the sand and slaked lime are first dry mixed with the beaters 20 operating at a peripheral speed of 6 m/sec., and thereafter water is added and the speed of the beaters reduced to half. The mixing tools may be inoperative during the dry mixing and the addition of water may be controlled by hygrometer electrodes provided in the beating or mixing tools. There is a molarised central discharge door 26. Grinding. Two of the mixing tools 9, 10 or 18, 19 may be replaced by edge-rollers.
Patent GB-1235735-A (GB)
Title: Switching circuit arrangement
IPC: H04N5/268
Filed: 1968-11-13
Abstract: 1,235,735. Television; gated transistor amplifiers. CENTRAL DYNAMICS Ltd. 13 Nov., 1968 [22 April, 1968], No. 53919/68. Headings H3T and H4F. Relates to apparatus for compensating for path delay caused by the insertion of such units as mixing amplifiers and special effects units in the video signal path of a television system. These units, which may be switched in and out at random, will necessitate a switching apparatus containing two paths, one containing a delay line when the units are not switched in and one containing no delay for when the units are switched in. In inserting such a delay line in one circuit, the frequency losses caused by this must be compensated for by an equalizer, and the attenuation of the equalizer must be compensated for in the undelayed path by an attenuator with equal attenuation to that of the equalizer, hence requiring a large amount of additional circuitry. The invention, shown in Fig. 3, provides a means for compensating for the delay line 46, both in frequency and gain, without the need for much additional circuitry, by providing the electronic switches 48, 50, which switch either the delayed or the undelayed line to the output, with a variable feedback path from the output to an early stage in the switch. This is shown in Fig. 4 wherein the preamplifiers 52 and 60 are arranged to pass a signal from inputs 54 and 62 to output stage 58 only when a control signal from 55 or 63 is present. The output of the common output stage 58 is fed back through a variable impedance network Z F  to the appropriate preamplifier to control the video signal therethrough. Each network Z F  has a means for adjusting the gain and the frequency response of the feedback signal in order to compensate for variations in these quantities caused by the delay line. Detailed circuitry of a switch according to the invention is shown in Fig. 5 in which the preamplifiers 52 and 60 comprise a long-tailed pair 102, 104 through which the video signal passes. Transistor 106 serves as a constant current source for transistors 102 and 104 and when this is cut-off by means of a signal via transistor 136 from terminal 56, the video signal is prevented from passing. The feedback signal from output stage 58 is passed through a resistor network 118 to control the gain and a resistor/capacitor network 126 to control the frequency response thereof.
Patent GB-1102218-A (GB)
Title: Oil-soluble condensation products and a process for their production
Inventor: HAARER ERICH
IPC: C08G10/04
Filed: 1966-12-06
Abstract: Oil soluble condensation products are prepared by interacting (a) 1 mole of a dialkyl benzene with (b) 1.5 mole to 6 mole of HCHO or an equivalent amount of a nitrogen-free formaldehyde generator at 70-180 DEG  C., using an acid catalyst, neutralizing the product or washing out the acid and treating the product with (c) 10-40 times its weight of ethylene oxide or propylene oxide.  The alkyl groups in (a) may contain up to 20 carbon atoms.  (a) and (b) may be reacted in the presence of 1 mole of H2SO4 as catalyst.  The second reaction may be under a pressure of 2-20 atmospheres in the presence of a caustic alkali as initiator and an inert solvent.  Both reactions may be effected under an inert atmosphere and (a), (b) and/or (c) may be replaced by mixtures of reactants.  In an example formalin and di-isopropylbenzene are interacted and the product dissolved in diisopropylbenzene.  KOH is added as initiator followed successively by propylene oxide and ethylene oxide.  The product is extracted from the solvent and dissolved in a mixture of di- and mono-methyl naphthalene.
Patent GB-1523438-A (GB)
Title: Air heating stove
IPC: F24H9/18
Filed: 1975-12-31
Abstract: 1523438 Air heating stoves; burners HARRY TAYLOR OF ASHTON Ltd 31 Dec 1975 [19 Dec 1974] 54943/74 Headings F4S and F4T An air-heating stove comprises a fan 9, a combined combustion chamber and heat exchanger disposed downstream of the fan, a duct 5 providing air flow communication between the fan and the combustion chamber 2 for feeding a portion of the air flow to the chamber 2, the balance of the air flow being directed over the heat exchanger 3 to a warm air outlet 18 in the housing, and a burner disposed in the vicinity of the downstream end of the duct 5. In another embodiment (Fig. 3 not shown), the duct 5 comprises a helical chamber having a tangential inlet and an axial outlet; and the chamber 2 is closed at its upper end with internal ducting whereby the combustion gases are deflected downwardly before passing outwardly and upwardly to a central flue 4. One form of burner (Fig. 2 not shown) comprises a nozzle (19) through which oil under pressure is supplied to be mixed with air at the end of frustro-conical duct S by means of a turbulator (20). The burner also includes spark electrodes (21), a safety photo-cell 22 and a choke 23. Alternatively, a pressure jet oil burner may be provided having a burner diffuser plate (Fig. 7, not shown) comprising a central disc, an annulus spaced from the disc and a plurality of guide vanes disposed in the space.
Patent GB-1338407-A (GB)
Title: Process for the production of urethane polyols and the use  thereof in the production of polyurethane plastics
IPC: C08G18/10
Filed: 1970-11-23
Abstract: 1338407 Polyurethanes BAYER AG 23 Nov 1970 [28 Nov 1969] 55524/70 Heading C3R [Also in Division C2] Polyurethanes are obtained by isocyanatepolyaddition in which a polyol of the formula wherein R is a hydrogen atom or a methyl group, R<SP>1</SP> is an alkyl, alkenyl, cycloalkyl, aralkyl or aryl group or the radical in which n is from 2 to 6 and R<SP>11</SP> is a hydrogen atom or a methyl group provided that where R<SP>11</SP> is a methyl group R is a hydrogen atom; is used as a chain extender. In an example a polyurethane is obtained by reacting naphthylene diisocyanate with a glycol adipic acid polyester (OH number 56) and reacting the product with ethyl N,N-bishydroxyethyl carbamate. Polyurethanes may also be obtained from a polyol-polyisocyanate reaction mixture comprising a polyol of the above formula obtained by a particular method of preparation (see Division C2).
Patent GB-1152136-A (GB)
Title: High Strength Resistor
IPC: H01C7/22
Filed: 1967-12-07
Abstract: 1,152,136. Sheathed glass rods. CORNING GLASS WORKS. 7 Dec., 1967 [9 Dec., 1966], No. 55613/67. Heading C1M. [Also in Division H1] A resistive film is carried on a glass substrate 10 consisting of a core 18 integral with a sheath 20 having a lower coefficient of expansion and maintained in compression. The resistive film contains oxides of tin and either antimony or indium. Suggested glass compositions are:: The sheath and core glasses may be fused together by means of a redraw method or manufactured by a double orifice method. U.S.A. Specifications 3,209,641, 3,069,294, 2,934,736 and 2,564,706 are referred to.
Patent GB-1202050-A (GB)
Title: Improvements in or relating to medicinal substances
IPC: A61K9/70
Filed: 1967-12-07
Abstract: 1,202,050. Insolubilized enzymes. BOEHRINGER MANNHEIM G.m.b.H. 7 Dec., 1967 [19 Jan., 1967], No. 55617/67. Heading C3H. [Also in Division A5]  A process for producing small disc-shaped particles of uniform size containing enzymes embedded in a semi-permeable carrier material, comprises the steps of (A) converting the enzymes and the carrier material into threads; (B) embedding the resulting threads parallel to each other in a hardenable embedding material; (C) cutting the solidified bedding material in cross-direction to the threads into thin slices, and (D) separating the bedding material from the disc-shaped particles cut from the thread. The thread material may be coated on to a centrally located core thread to improve its stability characteristics. Suitable enzymes include esterases, carbohydrases, amidasea, hydrolases, anhydrid phosphatases and amino acid-decarboxylases.
Patent GB-1420950-A (GB)
Title: Blasting salvos method and apparatus for filling and sealing plastics
IPC: F42D1/04
Filed: 1972-12-01
Abstract: 1420950 Blasting NITRO NOBEL AB 1 Dec 1972 [1 Dec 1971] 55679/72 Heading F3A [Also in Division E1] A method of connecting a blasting salvo using initiators each of which comprises a low energy fuse-cord 4, Fig. 15, having a primer P secured to one end and a connecting block 1 secured to the other, the connecting block enclosing a charge 10 against which the end of the fuse-cord is secured and means for holding a middle portion of another fuse-cord next to the charge, comprises: (a) placing the primer P of each initiator in each blasting charge; (b) connecting the connecting block of each initiator directly to the fuse-cord of the next, leaving the block of the last initiator free; and (c) connecting means for firing the salvo to the fusecord of the first initiator. Any initiator can be lengthened by means of a member comprising low energy fuse-cord extending into a connecting block at one end and having a moisture proof closure at the other. The means for initiating the salvo comprises low energy fusecord with a primer at one end and a connecting block at the other. The connecting block is formed in one piece, Figs. 1, 2, 3 and 4 (not shown); or in two pieces, Figs. 5 to 7 (not shown) and Figs. 8 to 13 (not shown).
Patent GB-1282607-A (GB)
Title: Improvements in and relating to methods of manufacturing semiconductor devices
IPC: H01L23/48
Filed: 1969-11-14
Abstract: 1282607 Schottky junction semi-conductor device PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 14 Nov 1969 [19 Nov 1968] 55847/69 Heading H1K A semi-conductor device comprises a semiconductor body of one conductivity type with an apertured mask on one surface thereof, a cavity at the area of the aperture extending into the body and laterally below the mask and a Schottky electrode layer of lesser thickness than the depth of the cavity in the cavity extending to below but not up to the mask. An epitaxial N-type silicon layer 9 is provided with a silicon oxide mask 3 having one or more holes 4 therein. An etchant comprising HF+HNO 3  is used to form a cavity 7 and nickel layers 5 and 8 are formed by vacuum deposition. The conductive layer 8 may be retained as a capacitive screen or both the layer 8 and mask 3 may be removed. A pressure contact of molybdenum (6, Fig. 3, not shown) is moved across the surface of the device until it lodges in a cavity and the connection tested for good diode characteristics. When a good diode is found the diode is assembled provided with an envelope. In modifications the silicon is replaced by an A<SP>III</SP>B<SP>V</SP> compound, the nickel by gold or platinum or the oxide by silicon nitride. An intermediate gold layer may be used between the layer 5 and the electrode and the electrode may be joined by thermal compression bending. The collector electrode of a transistor may be formed by the above technique.
Patent GB-559344-A (GB)
Abstract: 559,344. Valves. FAIRWEATHER, H. G. C. (Vinco Corporation). Dec. 21, 1942, No. 18145. [Classes 69 (ii) and 135] A valve device particularly adapted for use in the exhaust line of control valve for a hydraulic cylinder is actuated by two independently operated cams and has a valve member comprising a piston with a plurality of triangular shaped serrations extending from one end thereof to an apex intermediate the length of the piston. The serrations may be of different lengths in a graduated series or in groups of varying length. A spring 32 holds an abutment 25 in contact with an edge cam 28 secured to one face of a cylindrical bearing member 27 arranged in a housing 24. A spindle 29 on the member 27 is formed with a knurled manipulating head 31 provided with an indicating dial 30. An extension 33 of the valve member is provided with a hardened head 35 engaged by a tappet 37 in contact with a cam 36 actuated by suitable means.
Patent GB-1067483-A (GB)
Title: Improvements in and relating to polymers
IPC: C08F6/02
Filed: 1964-03-20
Abstract: Polyhydrocarbons, e.g. homo- and co-polymers of ethylene, propylene and butenes, containing halogen-containing catalyst residues are reacted with a catalyst deactivator which is an aliphatic phosphite to form a volatilizable halide and an inert non-corrosive residue. Methyl, ethyl, propyl and butyl phosphites are specified.  The phosphite may be directly incorporated in the polymer with the latter in solution or melt form or, with the polymer in a powder form, the phosphite may be incorporated by means of a fluidized bed technique using as carrier gas the monomer of the polymerization process or an inert gas. Preferably the polymer is treated with steam prior to the treatment with the phosphite deactivator.  In the example polypropylene powder, prepared using a catalyst containing ethyl aluminium dichloride, hexamethyl phosphoric triamide and titanium trichloride, is reacted under nitrogen with a solution of triethyl phosphite in dry petroleum ether containing antioxidants, the solvent is evaporated off and the resultant polymer powder is melt blended under nitrogen.
Patent GB-1409285-A (GB)
Title: Expandable polymers of vinyl-idene aromatic compounds
IPC: C08J9/224
Filed: 1972-12-08
Abstract: 1409285 Coated expandable particles SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 6 Dec 1973 [8 Dec 1972] 56731/ 72 Heading B2E [Also in Division C3] Coated expandable particles of a polymer of a vinyl or vinylidene aromatic compound are made by contacting the expandable particles with a coating composition comprising a glyceryl C 16-20  carboxylate and a metal stearate. Suitable vinyl aromatic compounds are styrene, α-methyl stryrene, vinyl toluenes, and halogen substituted styrenes. The coating ingredients may be applied separately or, preferably, together as a slurry or solution. In the examples expandable beads of polystyrene containing a mixture of n- and iso-pentane were dry coated with mixtures of glyceryl and sodium and/or zinc stearate. Potassium or calcium stearate may also be used as the metal stearate.
Patent GB-1314779-A (GB)
Title: Keyboard assembly for organ
IPC: G10H1/34
Filed: 1971-12-09
Abstract: 1314779 Electrophonic musical instruments MATTEL Inc 9 Dec 1971 [15 Dec 1970] 57187/71 Heading G5J An electronic organ is provided with a piano type keyboard which is played to produce tones of a particular pitch and a button switch section which is used to play chords or other special sounds. Each key 24, Fig. 2, is an elongated member comprising side walls 34, 36 an upper surface 38 and a base 40. Recesses 42, 43, which are of different shape to prevent binding, are formed in the base and extend into the side walls 34, 36 such that the keys may be pivotally mounted on a bar 44 attached to the housing 10. The bar 44 has an upright portion 46 covered by a strip 48 of bearing material to reduce noise and friction during pivoting. Protuberances 72 and 74 are provided on one side of each key to minimize rubbing and spacer fingers provided between groups of keys limit sideward shifting. A stop 52 limits the range over which the key may pivot and the front portion 26 of the key is biased upwards by the member 56 formed of resilient electrically conductive material. Side portions of this member are bent downwardly to press against the rear portion 28 and a central part 66, supplied with an electrical contact 32, is arranged such that on depressing the key the contact 32 touches a stationary contact 30. Each member 56 is connected to one stage of a tone generator and each contact 30 is connected to a common amplifier and loud-speaker such that when the contacts touch the corresponding note is produced. The button switch section comprises a sheet 80, Fig. 6, formed of resilient electrically conductive material which is positioned over a circuit board 82 and which is spaced from the circuit board by means of spacer rods 84. The circuit board is supplied with conductive strips 88 each of which is connected to a different output of a chord generator. A contact spot 90 is located on each conductive strip immediately below a corresponding tab 86 formed in the sheet 80. Buttons associated with the tabs are  urged upwards by the spring force of the tabs. On depressing a particular button the tab is forced downwards to contact the associated spot 90 and a chord is produced.
Patent GB-1489874-A (GB)
Title: Apparatus and methods of measuring fluid flow
IPC: G01F1/696
Filed: 1974-12-11
Abstract: 1489874 Measuring temperature and mass flow electrically NATIONAL RESEARCH DEVELOPMENT CORP 11 Dec 1974 [12 Dec 1973] 57497/73 Heading G1N Relates to compensating for thermal inertia in a fluid-flow meter of the type in which a fluid passing along a duct 10 is heated (by a coil 11) and the temperatures upstream and downstream of the heater are measured by thermistors 12, 13 or other temperature sensors connected in a bridge circuit 12-15, the output signal of which represents the flow-rate. A change in the flow-rate results in an exponential change in the signal to a final value representative of the new flow-rate. The first differential of the signal, multiplied by the time constant of the exponential change, is added to the signal to give a total signal to an indicator 20 or 31 which reaches the new value of the signal much more rapidly than the signal itself. In Fig. 1, the bridge output feeds a differential amplifier 16 which supplies a differentiator 17 and an adder 19, the output of the differentiator passing via an inverter 18 to a second input of the adder 19. The units 16-19 can each be made of the same type of integrated operational amplifier connected in respective known ways. In Fig.3, the bridge output is connected via a resistor 27 to a high gain amplifier 26 having a tapped resistive feedback 28, 29, with a capacitor 30 connected between the tapping point and earth.
Patent GB-1159495-A (GB)
Title: Improvements in or relating to Self-Advancing Mine Roof Supports
Inventor: ARNOTT LESLIE JOHN
IPC: E21D23/00
Filed: 1966-12-23
Abstract: 1,159,495. Self-advancing mine roof supports. GULLICK Ltd. 23 Nov., 1967 [23 Dec., 1966], No. 58353/66. Heading E1P.  In an advancing mine-roof support assembly comprising two frames, see Fig. 1 .(not shown) arranged in .parallel and interconnected by a parallel .arrangement of pivotal, links 24, 25 for alignment purposes, advancement is effected by a ram having interconnected pistons 30, 31 working in opposed cylinders. 28, 29 which are pivotally connected to one of the links 25 and .to a conveyor C respectively as shown. Control of the supply of pressurefluid to the props and ram of the assembly or a series of such assemblies is effected by striker valves positioned at. the ends of the cylinders and actuated by their pistons.
Patent GB-1278119-A (GB)
Title: Regeneration of deactivated catalyst containing a platinum group component and a sulfur component
Inventor: HAYES JOHN CHANDLER
IPC: C10G35/085
Filed: 1969-12-02
Abstract: 1278119 Catalyst regeneration UNIVERSAL OIL PRODUCTS CO 2 Dec 1969 58707/69 Heading B1E [Also in Division C5] A catalyst containing a platinum group component and a sulphur component and which has been used in a hydrocarbon conversion process is regenerated by: (a) stopping contact of the hydrocarbon charge stock with the catalyst; (b) reducing the sulfur content of the catalyst to less than 0.02 wt. % by contacting the catalyst, without intervening treatment, with a sulphur-free and water free hydrogen stream, suitably at 430 to 595C and a pressure of 3.4 to 24 atmospheres gauge; (c) removing the substantial portion of the carbonaceous deposit by treating with oxygen, suitably at 370 to 595C; (d) purging free oxygen from the treated catalyst; (e) reducing the platinum group component by contact with a sulphurfree and water-free hydrogen stream, suitably at 480 to 595C; and (f) incorporating 0.05 to 0.50 wt. % of sulphur in the catalyst by treatment with an oxygen free sulphiding gas consisting predominantly of hydrogen and hydrogen sulphide, suitably at 480 to 595C using a gas containing an amount of sulphur equivalent to 0.1 to 2 moles of hydrogen sulphide per 100 moles of hydrogen. Specified platinum metals are platinum, palladium, rhodium, ruthenium, osmium and iridium and specified suitable carriers for the catalyst are alumina, silica, zirconia, magnesia, boria, thoria, titania, strontia, and mixtures of two or more thereof. The catalyst also preferably combined halogen.