baber/WOPTO huggingface dataset:
Patent GB-1161841-A (GB)
Title: Improvements relating to Control Systems for D.C. Electric Motors.
Inventor: WEST RICHARD ALFRED
IPC: H02P7/288
Filed: 1965-11-27
Abstract: 1,161,841. Control of D.C. motors. CONTACTOR SWITCHGEAR Ltd. 22 Sept., 1966 [27 Nov., 1965], No. 50487/65. Heading H2J. The armature of a crane motor is connected to the field circuit through two branches which are alternately rendered conductive or non-conductive automatically depending on whether the motor is driving or regenerating. On moving a master switch to the lowering notches, motor field winding SF, brake coil SB, and one or more resistance sections are connected across supply-lines L1<SP>1</SP>, L2<SP>1</SP>, whilst motor armature A<SP>1</SP> is connected, at one side, through resistor Ra, and selectively through resistor sections Rx, Ry, Rz, to the line L2<SP>1</SP>. The other side of the motor armature is connected through rectifiers T1, T2, across the windings SF, SB. When the load is being driven downwardly, current passes through rectifier T2 so that the armature and field winding are series-connected. As the load overhauls the motor, the armature current reverses for regenerative operation, the rectifier T1 conducting to feed armature current through the field circuit and back to the supply. In the " off " position of the master switch, a dynamic braking loop is established through resistor Rdb. The resistance network Rx, Ry, Rz is set to provide one effective value for determining the total series resistance common to both field and armature (on the first three lowering notches) or two other independent values for modifying the total field resistance (on the higher lowering notches). The rectifier T1 may be replaced by a contactor or silicon controlled rectifier. A safety relay VR is provided.
Patent GB-1376319-A (GB)
Title: Combustion devices
IPC: F23R3/18
Filed: 1971-11-01
Abstract: 1376319 Gas turbine combustion apparatus DEFENCE SECRETARY OF STATE FOR 11 Dec 1972 [1 Nov 1971] 50635/71 Heading F1L A flame stabilizing device, e.g. for the re-heat duct 1 of a gas turbine engine, comprises an annular member 2 having a faired upstream facing surface 3 and a flat downstream facing surface 4 and suction means for influencing gas flow over the member so as to induce stable vortex formation adjacent surface 4 when flame stabilization is not required. The suction means comprises suction S acting through holes or annular continuous or discontinuous slots 5, 6 so as to reduce the drag of member 2. A flow divider 7 may be provided to separate the vortices.
Patent GB-1449065-A (GB)
Title: Plstic paper manufacture
IPC: C08J9/32
Filed: 1973-10-31
Abstract: 1449065 Hydroxyalkyl acrylate polymer/expanded particle films DOW CHEMICAL CO 31 Oct 1973 50638/73 Heading C3C A film is produced by forming a film of a mixture of 30-95% by wt. of a film forming component comprising 75-100 wt. per cent of a hydroxy alkyl acrylate and from 5-25 wt. per cent of expandable thermoplastic microspherical particles having encapsulated therein a volatile liquid foaming agent and thermally expanding without rupturing said microspherical particles whilst exposing said film to high energy ionizing radiation in an inert atmosphere to polymerize said mixture. The mixture may contain up to 65 wt. per cent of a filler and also an unsaturated polyester resin, and the thermoplastic particles are preferably of a copolymer of acrylonitrile with vinylidene chloride or styrene. In the examples films of 2 hydroxy propyl acrylate containing neopentane as blowing agent and additionally containing CaCO 3 , n-butyl acrylate, degraded cellulose acetate, a vinyl ester of an unsaturated polyester as additives and curing by passing through a beam of 2MEV electrons to give a dose of 0À5 megarads in an inert (oxygen free) nitrogen atmosphere.
Patent GB-1433765-A (GB)
Title: Titanium trichloride
IPC: C08F10/00
Filed: 1973-11-01
Abstract: 1433765 TiCl 3  SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 30 Oct 1974 [1 Nov 1973 29 Nov 1973] 50781/71 and 55344/73 Heading C1A [Also in Division C3] Violet titanium trichloride is prepared by reducing TiCl 4  with at least 0À45 mol. di-alkylaluminium hydride per mole of TiCl 4  at a temperature below - 50‹ C., the brown TiCl 3  thus formed being converted to the violet form at a temperature above 20‹ C. (e.g. by heating to 80-300‹ C.). Optionally the conversion of the brown TiCl 3  to the violet form may be effected in the presence of TiCl 4  and an organic complexing agent, e.g. a dialkylether having 2-8 carbon atoms in each alkyl group. The violet TiCl 3  may be employed in the polymerization of olefins, together with an activator consisting of a dialkylaluminium mono halide (see Division C3).
Patent GB-1282640-A (GB)
Title: Differential frequency meter
IPC: G01R23/02
Filed: 1969-10-16
Abstract: 1282640 Frequency measurement; frequency changers COMMISSARIAT A L'ENERGIE ATOMIQUE 16 Oct 1969 [22 Sept 1969] 50832/69 Headings H3A and H3T A differential frequency meter (Fig. 1) -for measuring the difference of two frequencies F 1 , F 2  comprises mixers 5, 6 for mixing the signals F 1 , F 2  with higher reference frequencies f R1  and f R2  which may be consecutive multiples of f R  and filtering the output in filters 7, 8 to obtain frequencies f R1 -F 1  and f R2 -F 2  which are further combined in a mixer 9 and passed through a filter 10 to obtain a signal of #f + #F which is passed to a frequency measurement circuit comprising a generator 11 triggered by signal #f + #F to pass clock pulses from an H.F. oscillator 39 so as to deliver complementary pulses Q, Q calibrated in amplitude and duration to an integrator 12 whose output is nearly proportional to the frequency difference #f. The generator 11 may comprise (Fig. 4, not shown) a shaping circuit (33) converting the difference frequency signal to pulse form setting a bi-stable generator (34) to yield a signal which is passed through a delay (36) to trigger a further bi-stable (35) so as to pass clock pulses from generator 39 through a counting chain (35, 37, 38) to a chopper circuit (41) which gives complementary signals Q, Q calibrated in amplitude and frequency to integrator 12. When the clock signals have passed through the last bi-stable (38), a re-set pulse from a generator (40) is applied to the input bi-stable (34).  The mixers 5 or 6, comprise, Fig. 2, an input transistor 14 followed by a phase-splitter arrangement comprising transistors 15, 16 to give out of phase signals to clipper FET's 21, 22 driven by reference signal f R1  or f R2 , the clipped signals being fed to a summing transistor. The multiplier 9 (Fig. 3, not shown) has the two inputs fed to a voltage driven ,transistor (29) and to a current driven transistor (30), the collector current of the first transistor (29) being proporttional to the product of the two inputs.
Patent GB-1215695-A (GB)
Title: Improvements relating to gas-cushion vehicles
Inventor: HUNT ROWLAND DELVILLE
IPC: B60V1/18
Filed: 1967-11-08
Abstract: 1,215,695. Air cushion vehicles. VOSPER Ltd. 4 Nov., 1968 [8 Nov., 1967], No. 50840/6 7 Heading B7K. An air cushion vehicle which during part of its operation is wholly or partially supported above the surface of water by at least one pressurized gas cushion 12 has spaced supports 14, 17 on which it can rest stably on a solid surface, the supports comprising two laterally spaced skegs 14 each carrying propulsion and steering means 15, 16 at its aft end and which are located in and below the space of the cushion 12, and two further support members 17 provided forward of the skegs and extending below the hull 10 a lesser distance than skegs 14. The vehicle, which may be a forward loading ferry, may be stably supported on a sloping ramp 19 with a slightly nose-down attitude. The propulsive means 16 may be screws, or water jets may replace both screws 16 and rudders 15.
Patent GB-1236889-A (GB)
Title: Improvements relating to a globe map device
Inventor: ASHLEY MERWIN FRANKLIN
IPC: G09B27/08
Filed: 1969-10-16
Abstract: 1,236,889. Caps. M. F. ASHLEY. 12 Oct., 1970 [16 Oct., 1969], No. 50847/69. Heading A3V. [Also in Division G5] A cap comprises a hemispherical bowl of flexible material displaying a map on at least one surface, the bowl being reversible to make either of its surfaces the convex surface. Both surfaces may carry maps. The device has a central hole to facilitate folding, and may be of rubber, neoprene, polypropylene, or plasticized non-woven fabric.
Patent GB-1346920-A (GB)
Title: Photographic silver halide materials
IPC: G03C1/42
Filed: 1971-11-02
Abstract: 1346920 Piperidino hexose reductone derivatives EASTMAN KODAK CO 2 Nov 1971 [2 Nov 1970] 50867/71 Heading C2C [Also in Division G2] Piperidino hexose reductone monoacetate of the formula wherein R 1  and R 2  complete the piperidino ring, R 3  is acetyl, n is 2 and one of R 5  and R 6  is OH and the other is CH 3  is made by reacting piperidino hexose reductone with acetic anhydride. Piperidino hexose reductone (wherein R 3  in the above formula is (H) is made by heating piperidino and D-glucose in the presence of galcial acetic acid. Anhydropiperidinohexose reductone (wherein R 3  is H and R 5  and R 6  represent = CH 2 ) is made by treating piperidino hexose reductone with anhydrous HCl in butanol. Dihydroanhydropiperidinohexose reductone (wherein R 3  is H, one of R 5  and R 6  is H and the other is methyl) is made by hydrogenating anhydropiperidino hexose reductone in the presence of Raney nickel.
Patent GB-1537275-A (GB)
Title: Perspective drawing apparatus
IPC: B43L13/14
Filed: 1976-10-22
Abstract: 1537275 Perspective plotter C G WILKINS 22 Oct 1976 [15 Dec 1975] 51327/75 Heading B6P A perspective drawing apparatus comprises three straight edge arms 17, 19 pivoted together, the arms 17 being pivotally and slidably received in a guide 26, located in a selected one of a plurality of alternative blind holes 13 to one side of the drawing surface. The third arm 19 may be horizontally and vertically slidable in slot 42 and non-rotatable guide 40, or may carry a T-square end which co-operates with the edge of the drawing surface. Slots and blind holes may be provided for alternative use by each of the guides, and may extend to all sides of the drawing surface. An intermediate member carrying a curved slot may be placed along a side of the drawing surface, and be located by two blind holes to allow alternative movement of the co-operating guide.
Patent GB-1261182-A (GB)
Title: Intruder alarm system
Inventor: SADLER ALLAN
IPC: G08B13/22
Filed: 1967-12-15
Abstract: 1,261,182. Burglar alarms. A. SADLER. 17 March, 1969 [15 Dec., 1967], No. 52105/67. Heading G4N. A burglar alarm system comprises a master warning circuit arranged to produce a first alarm and an ancillary circuit arranged to produce a second alarm in response to operation of the master warning circuit and provision for the first alarm to be operated when the second alarm is operated by other means. When one of the detectors 5, 6 becomes open circuited by action of an intruder, transistor 22 becomes non- conductive after a time delay 25 so as to trigger a silicon controlled rectifier 34 which, after a further time delay 35 triggers a further rectifier 40 which turns on transistors 48, 53, energizing relay 52 and operating an alarm bell 54. Contacts 52/1 are coupled via conductors C1, C2 to an ancillary warning circuit (Fig. 2, not shown) in neighbouring premises whilst conductors D1, D2 couple contacts 52/1 to an external warning circuit (Fig. 3, not shown). The ancillary warning circuits are similar to that shown in Fig. 1 but omitting time delays. Operation of either ancillary warning circuit e.g. by the cutting of conductors C1 . . . D2 also actuates the master warning circuit shown. A further SCR is connected across the relay winding in the external warning circuit (Fig. 3, not shown) which may be turned on so as to silence the external bell. If the alarm in neighbouring premises is switched off, the master alarm bell 54 will operate unless the switch 80 is closed. The time delay enables an authorized person to enter or leave the premises without operating the alarm. Mode selection switch 56 prevents operation of either or both ancillary warning circuits. Intruder sensors.-The detectors 5, 6 may be switches operated mechanically or magnetically and may be moulded into a single block including a conductive loop 14, the cutting of which will operate the alarm. Resistors may be connected across each detector switch. A large inductance may be included in the control circuit, interruption of the current through which causes a large voltage to trigger the alarm. Alternatively, each detector may produce relaxation or other oscillation, the frequency of which is indicative of the location of the detector.
Patent GB-1348517-A (GB)
Title: Quaternary salts of tri- beta-propyloxyethyl amine derivatives and process for producing same
Filed: 1971-11-10
Abstract: 1348517 Quaternary ammonium salts EISAI CO Ltd 10 Nov 1971 [11 Nov 1970] 52252/71 Heading C2C Compounds of the general formula (R = alkyl, aralkyl except PhCH 2 , cyclohexylalkyl, PhCH 2  substituted by OH, alkoxy, PhO or PhCH 2 O, polyalkylbenzyl, cinnamyl, phenacyl, phenoxyalkyl, naphthylmethyl; X = halogen) are prepared by reacting tri-(#-propoxyethyl)amine with RX. These compounds are anti-ulcerative, and may be administered in the form of pharmaceutical preparations containing them in association with a carrier.
Patent GB-1384870-A (GB)
Title: Propellant compositions
IPC: C06B45/00
Filed: 1964-12-28
Abstract: 1384870 Propellants ATLANTIC RESEARCH CORP 28 Dec 1964 [15 Jan 1964] 52590/64 Addition to 994184 Heading ClD A propellant composition of increased burning rate comprises an oxidizing component, a non- metal fuel component, and a metal fuel component, at least a part of the metal being of Al, Be, Zr, Mg, Ti, W, or an alloy or mixture thereof, and in the form of staples having a maximum thickness of about 0À001 inch and a maximum ratio of thickness to width of about 1 to 4. The staples may be of flat, U-shaped, angled, rounded, or tubular form and may be randomly dispersed or oriented normal to the burning surfaces of solid or perforated grains moulded from the composition. Finely-powdered metal, e.g. Al, Be, Mg, Zr, may also be present. The non-metal fuel may be a polymer, e.g. a polyether, polysulphide, polyurethane, butadieneacrylic acid copolymer, polyester, polyamide, cellulose acetate, polyvinyl chloride, or asphalt. Alternatively, an oxygen-containing fuel may be used, e.g. cellulose nitrate or nitroglycerine. Plastic compositions, suitable for extrusion into the combustion chamber of a rocket, may be obtained by using liquid fuels, for example hydrocarbons (including polyisobutylene), esters alcohols, ethers, and hydrazines, several of which are specified. Suitable oxidizers are ammonium, potassium, sodium, and lithium perchlorates and nitrates, calcium, barium, and sodium peroxides, hydrazine nitroformate and nitrate, nitronium perchlorate, PETN, hexanitroethane, and mannitol hexanitrate. Copper chromite and iron oxide may be added as burning rate catalysts, and ethyl centralite and 2-nitrodiphenylamine as stabilizers. The burning rate may be further increased by adding a minor amount of silver or copper staples; reference is also made to the use of aluminium coated with Zr, Ag, or Cn. The metal staples may also be incorporated in double base propellants which may include nitrocellulose, nitroglycerine, diethylene glycol dinitriate, PETN, trinitrobutane, liquid plasticizers, and 'solid oxidants. In examples, ingredients additional to those specified above are carboxy-terminated polybutadiene, tris-[1-(2-methyl)aziridinyl]phosphine oxide (as a curing agent), isodecylpelargonate, dioctyl adipate, carbon black, equal parts of glyceryl mono-oleate, pentaerythritol dioleate, and dioctyl sodium sulphosuccinate, an epoxy-modified ether-ester type heat and light stabilizer, and liquid barium-cadmium carboxylate stabilizer containing auxiliary organo phosphate heat and light stabilizers.
Patent GB-1445753-A (GB)
Title: Apparatus and method for electrical precipitation
IPC: B03C3/40
Filed: 1973-11-15
Abstract: 1445753 Electrostatic precipitators MEAD CORP 15 Nov 1973 53115/73 Heading B2J An electrostatic precipitator 1 comprises an inlet 4 and an outlet 7; parallel electrodes 2, 3 which are connected by lines 10, 11 to the opposite poles of d.c. source of about 20,000V, for example, and which are formed with a plurality of respective projections 13, 14; and a manifold 8 for supplying a gas cleansing liquid, e.g. water, to at least some of the projections 13. In operation, the concentration of the electric field at the tips of the projections 13, 14 ionizes contaminated gas passing through the precipitator and also causes the cleansing liquid to spray back and forth between the electrodes, whereby the flowing gas is cleaned by both scrubbing and precipitation. Each electrode may comprise a backing board with a conductive faceplate, e.g. of aluminium, in which the projections have been formed by a stamping. and .bending operation (Fig. 2, not shown).
Patent GB-1441286-A (GB)
Title: Suction roll apparatus for use in paper manufacture
IPC: D21F1/00
Filed: 1973-11-16
Abstract: 1441286 Rollers M F HAYES 16 Nov 1973 [12 Sept 1973] 53262/73 Heading F2U A suction roller assembly for use in papermaking comprises a rotary outer sieve 10, 12 and an inner stationary hollow cylinder 30, the sieve being supported on rods 14 and the cylinder having an arcuate slot 40 extending through 90 degrees and a passageway defined by walls 42, 44, 46, 48 leading from the slot to a position adjacent the rods. As shown the sieve consists of a fine wire mesh 10 supported on a coarse wire winding 12 over a number of axially-extending profiled rods 14 which are in turn supported on rings 16, 18 carried by trunnions 22 operating in bearings 33. The cylinder 30 consists of the slot 40, the dividing walls 42, 44, 46, 48 with scrapers 52 notched to clear the rings 16, 18 and water sheds or vanes 60. In operation stock is channelled to the rotating sieve adjacent one of the three divisions formed by the walls 42, 44, 46, 48 where initial drainage ensues in advance of the second division and a third division where air passes in. The water and air sucked through the slot 40 and the cylinder 30 by a pump. The web formed by the roller may be transferred to a felt which contacts and drives a couch roller. Instead of being driven by the felt, the sieve could be driven by a gear.
Patent GB-1327435-A (GB)
Title: Monochromators
IPC: G01J3/18
Filed: 1970-11-10
Abstract: 1327435 Optical systems SPERRY RAND CORP 10 Nov 1970 [10 Nov 1969] 53390/70 Heading G2J A monochromator comprises an entrance aperture 13, an exit aperture 19, a blazed diffraction grating 15, a light-reflective surface 16 positioned to receive light diffracted by the grating, the reflector 16 and grating 15 being rotatable about a common axis and being rigidly inter-connected. The grating may be formed holographically by interfering two laser beams on a photographic emulsion, and preferably has its blaze direction substantially in the plane of the grating.
Patent GB-1171148-A (GB)
Title: Image Orthicon Tubes
IPC: H01J31/36
Filed: 1966-12-12
Abstract: 1,171,148. Image pick-up tubes. FERNSEH G.m.b.H. 12 Dec., 1966 [16 Dec., 1965], No. 55531/66. Heading H1D. A method of manufacturing an image orthicon tube comprising an envelope with an elongated tubular portion 18 having a flange 7 and housing the scanning beam system, a bulb formed by a faceplate 19 and tubular portion 9 of greater diameter than portion 18 and an electrode arrangement including a target 14 having an active portion whose diameter is at least equal to that of the tubular portion 18; includes the steps of joining tubular portion 9 to flange 7, then inserting the electrode arrangement into the bulb and securing the faceplate 19 to the tubular portion 9. The electrode arrangement may comprise a grid 12, an accelerator electrode 15 and a field mesh 13 which may be inserted into the bulb before the target 14. Each electrode is provided with four springs 20 which engage in notches 11 incized into the wall of tube 9 to accurately locate them. Strip leads 21, 21a secured to pins 8 provide electrical connection to each electrode. The end of one of the leads 21a is joined to two bent wire springs which extend beyond the end of tube 9 so that they make resilient contact with the metallized portion 16 of photocathode plate 19 when it is fused, as by localized heating at about 50 degrees above the softening point of the glass, to the open end of tube 9. The tube manufacture is completed by assembling the beam system and the customary evacuation and photocathode development processes.
Patent GB-1242231-A (GB)
Title: Bi-propellant rocket engine
Inventor: ANDREWS EDWARD GEORGE DAVID
IPC: F02K9/60
Filed: 1967-12-09
Abstract: 1,242,231. Bi-propellant rocket engine. ROLLS-ROYCE Ltd. Dec. 3, 1968 [Dec.9, 1967], No.56079/67. Heading F1J. A bi-propellant rocket engine comprises a combustion chamber and a pair of tanks in which the propellants are stored separately of each other, each of the tanks being arranged to communicate, during operation of the engine, with the combustion chamber and being disposed coaxially one within the other, a portion of the outer peripheral wall of the inner tank and a corresponding portion of the inner peripheral wall of the outer tank being spaced apart radially and shaped to define therebetween an annular propulsion nozzle communicating with the combustion chamber. In Fig.1 the assembly comprises an inner propellant tank 1 of annular form and an outer propellant tank 2 also of annular form, the rearward portions 6 and 7 of the outer peripheral wall 3 of the inner tank and of the inner peripheral wall 4 of the outer tank being shaped so as to define an annular combustion chamber 10 and an annular propulsion nozzle 11. The outer tank 2 is engaged axially over the inner tank 1 until the radial surfaces 5 abut. Baffle members 14, 15 are disposed adjacent the wall portions 6 and 7 so that fuel flows upstream through the passage between the baffles 14, 15 and the adjacent wall portions 6, 7 to the injection ports 12, 13. The injection ports are initially closed by shear cups 16, 17 which are engaged within annular grooves 20, 21 formed in the walls of an annular piston 22 which is movable axially within a chamber 23 from the initial position shown to an operative position in which it abuts against the stop rings 24, 25. Such axial movement of the annular piston causes the cups 16, 17 to shear so that the propellants may pass through the injection ports 12, 13 through ports 26, 27 in the walls of che piston to a mixing space within the piston, the mixed propellants then discharging through ports 28, 29 into the combustion chamber 10. A solid propellant charge 38 is contained within breech 37 and upon firing by igniter 39, gases pass through bore 36 to the chamber 23 thus causing the piston 22 to move axially to the operative position. At the same time gases pass through bores 40, 41 bursting the sealing discs 42, 43 to the propellant chambers 1, 2 thus acting to pressurize the propellants within the chambers. A further rocket engine may be mounted in the space 45 within the inner propellant tank 1, Fig.5 (not shown). In place of an annular combustion chamber, a series of cylindrical chambers may be provided. Reference has been directed by the Comptroller to Specification 942, 047.