baber/WOPTO huggingface dataset:
Patent GB-1491884-A (GB)
Title: Four-stroke internal combustion engine and a method of operating such an engine to avoid atmospheric pollution
IPC: F02B23/08
Filed: 1974-10-14
Abstract: 1491884 Spray carburetters YAMAHA HATSUDOKI KK 14 Oct 1974 [24 May 1974 26 June 1974 12 Aug 1974] 44384/74 Heading F1H A carburetter of a four-stroke engine operable with a lean mixture has a low load mixture system opening adjacent the throttle valve 30b and the ratio of the diameter d o  of an air bleed orifice 320 of the low load system to the diameter D of the throttle valve containing bore is in the range between 0À035 and 0À065. To permit low load operation with a lean mixture the overlap of the inlet and exhaust valves is reduced compared with the high load overlap by increasing the length of a drive chain (85), Fig. 3 (not shown), between respective cam-shaft drives and/or the carburetter throttle valve is more open and the ignition is retarded to provide the same engine speed with normal throttle valve opening and ignition timing. A multi-cylinder engine may have one carburetter (120), Fig. 8 (not shown) supplying all the cylinders or respective carburetters (20a to 20d), Fig. 2 (not shown). The carburetter may have a liquid fuel collecting groove (33b), Fig. 11 (not shown) and the engine intake passage portions (17, 228), Figs. 4 and 8 (not shown), may be operated at a temperature between 90 and 135C to ensure vaporization of the fuel. The carburetter includes a manually operable starting mixture system. Fig. 16 (not shown). The engine includes an exhaust gas recirculation passage (143), Fig. 8, to the intake manifold (112) or respective passages (13a to 13d), Figs. 2 and 4, controlled by a suction operated valve which prevents recirculation at low load. The respective passages contain non-return valves (208), Fig. 18 (not shown), or flow restricting orifices (209), Fig. 19 (not shown). The engine has a thermal exhaust reactor (40), Fig. 14 (not shown) in the exhaust system, the reactor having a jacket (350) for cooling air controlled by a valve (353) to provide an optimum reactor temperature. The engine ignition system may include a plate (240), Fig. 9 (not shown), carrying points (251) providing optimum ignition and points (252) providing retarded ignition which are effective when the carburetter throttle valve is minimally open or the intake passage vacuum low.
Patent GB-1162814-A (GB)
Title: Improvements in Delivery Chutes
Inventor: FERREIRA PHILLIP DENNIS FERNAN
IPC: B65G11/14
Filed: 1965-10-20
Abstract: 1,162,814. Telescopic shoot for potatoes. P. D. F. FERREIRA. 10 Nov., 1966 [20 Oct., 1965], No. 44415/65. Heading B8S. In order to avoid damage to potatoes as they fall through a shoot, a shoot apparatus is formed of shoots 5, 6 and 7. These shoots are staggered left, right and left so that potatoes falling therethrough strike in turn walls 2, 3, pass through outlet 19, then strike wall 21 and finally exit at 32. In this way the fall of potatoes is retarded, the shoots being made of canvas. The shoots are supported from structure 8 by means of the ropes shown, the ropes being secured to eyelets 15 and freely through eyelets 14 and 13 secured to the shoots so that when a heap of potatoes is formed beneath the shoot unit the shoot 7 can be drawn upwards by means of the ropes, so as to avoid interference between shoot and potatoes.
Patent GB-1263348-A (GB)
Title: Electric ratchet wrench
Inventor: ALBERT JEAN PAUL
IPC: B25B23/147
Filed: 1969-09-09
Abstract: 1,263,348. Ratchet wrench. J. P. ALBERT. 9 Sept., 1969, No. 44439/69. Heading B3N. An electric ratchet wrench comprises an electric motor 1, Figs. 1 and 3, the casing of which forms a handle, a spring-urged slipping clutch 7 connecting the motor spindle 6 and a drive-shaft 5, and a ratchet wheel 10 for connection to a socket 12, driven in the required direction via a worm and wheel 8, 9, and pawls 13, 14. A further pawl 30 is provided so that the wrench can be manually operated independently of the gear drive. The pressure provided by clutch spring 23 is adjustable by means of a plurality of buttons 26a which are carried in inclined slots 26c and decoupling of the clutch upon overload takes place when shaft 5 and its worm 8 move axially against the pressure of spring 23. In a modification, the drive includes a slipping clutch 40, Fig. 5, and a reversible uni-directional pawl clutch 42. The ratchet drive from motor 1 is through the clutches 40, 42, and a crown-wheel and pinion 48, 44, and the manual drive is through either of the pawls 66, 74. The pawls are selected by a finger slide 92 which engages a lever 84 connected to clutch 42, which in turn is connected to levers 62, 62<SP>1</SP>. A further lever 98 is connected to the motor direction control switch 100. Operation of slide 92 selects the direction of rotation of motor 1, selects the direction of operation of clutch 42, and engages the necessary pawl with the ratchet wheel 50.
Patent GB-1363102-A (GB)
Title: Ring seals of a bearing
IPC: F16J15/3232
Filed: 1971-04-19
Abstract: 1363102 Seals SKF KUGELLAGERFABRIKEN GmbH 19 April 1971 [25 March 1970] 44701/73 Divided out of 1363101 Heading F2B A sealing ring for a bearing or a piston-rod comprises two sealing lips separated by a greasereceiving groove, one of the lips being sharpedged and the bisector of the angle of the sharp edge being at an angle to the axis of the ring other than a right-angle or a multiple of a rightangle, and a mounting portion formed of two circumferential beads with adjacent surfaces extending at an angle to one another at no more than a right angle when the ring is unmounted. The sealing lips may bear radially, Figs. 1 and 2, or axially, Fig. 3, the ring being snapped into position such that pressure is applied to the axially-outward lip 6 by the distortion of a projection 13. The axiallyinward lip 7 may be of a harder material than that of the other lip and serves as a grit excluder. Grease in the groove between the lips also serves as a seal.
Patent GB-1189086-A (GB)
Title: Method and Apparatus for Obtaining High Resolution Nuclear Magnetic Resonance Spectra
IPC: G01R33/46
Filed: 1968-09-20
Abstract: 1,189,086. Nuclear magnetic resonance spectrometers. SPECTROSPIN A.G. Sept.20, 1968 [Sept.20, 1967], No.44809/68. Heading G1N. In a nuclear magnetic resonance spectrograph for obtaining high resolution spectra of protons and other nuclei, the magnetic field is stabilized in known manner, using proton resonance, and the frequency of the signal used to excite resonance in the sample under investigation is coupled to the proton resonance frequency of the stabilizing loop. As shown in Fig. 1, proton resonance is excited in the field stabilizing sample Pp by a signal of frequency fp derived by multiplying the frequency fs generated by a stable oscillator 1. A stable oscillator 7 generates a frequency fd, small compared with fs, which is compared in a frequency comparator 6 with the difference between the frequency generated by a controlled oscillator 4 and fs; the resulting signal being fed via a phase discriminator 8 to control the oscillator 4 which therefore generates a frequency equal to fs + fd which is multiplied to provide a signal of frequency fk, the mean frequency of the N.M.R. spectrum of the nuclei being studied. The frequency of the signal applied to coil Sk to excite resonance in the sample being studied is swept over a range #, the frequency fk# being derived by mixing the outputs of oscillators 11 and 12, the frequency of oscillator 12 being controlled in such a way that # is kept in step with a variable reference voltage which is also used to control the abscissa of the recorder 19. A single sample tube may contain both the protons for the field stabilizing loop and the nuclei being investigated, either mixed or in separate, concentric, compartments. Instead of the frequency-to-voltage converter 15 and voltage comparator 16 used to control oscillator 12 in Fig. 1, a frequency comparator (20) may be used, a voltage-to-frequency converter (21) being connected between the reference voltage source (17) and the comparator, Fig. 4 (not shown). The apparatus may generate a plurality of frequencies for exciting resonance in the sample being investigated, a switch (26), Fig. 5 (not shown), being provided for selecting the frequency appropriate to a particular sample. A frequency synthesizer may be used in place of the system comprising parts 5 to 9, Figs.6 and 7 (not shown).
Patent GB-1203883-A (GB)
Title: Sectional incinerator construction
IPC: F23G5/44
Filed: 1968-09-23
Abstract: 1,203,883. Incinerator furnaces. BRULE' INCINERATOR CORP. 23 Sept., 1968 [7 Dec., 1967], No. 45082/68. Heading F4B. An incinerator is constructed of four prefabricated sections, an ash pit section 12 formed of metal plates with corner angle irons 16 which locate a combustion chamber section 4 having metal walls, a refractory lining, a charging door 8, and a port 6 leading to the secondary combustion chamber and flue sections 18, 22. A burner port is provided in the combustion chamber section, and the ash pit section carries a grate and has bottom air inlet openings. A secondary combustion chamber and up-pass flue at the side of the secondary combustion chamber are formed in a lower section 22, and an upper section 18, each having a refractory partition. Aligning rods 24 are secured to the lower section 22 and pass through holes in the corners of the upper section 18. Each section 18, 22 carries part of a refractory sleeve which projects into the port 6 in the combustion chamber section. The refractory linings of the sections are coated with refractory cement before the sections are joined to provide seals between the refractory linings of the sections. Each section has an insulating layer between the refractory lining and the outer metal casing.
Patent GB-1208003-A (GB)
Title: Pump with piston and diaphragm
Inventor: SCHLOSSER PAUL W
IPC: F04B53/12
Filed: 1967-10-04
Abstract: 1,208,003. Diaphragm pumps. P.W. SCHLOSSER. Oct.4, 1967 [Oct.28, 1966], No.45100/67. Heading F1A. A hydraulically actuated diaphragm pump comprises a diaphragm 19, Fig.1, clamped between a housing member 12 and a member 70 by bolts clamping a housing member 11 to member 12, member 70 being free to move axially to increase the clamping action on the diaphragm periphery when actuating piston 15 is on its pressure stroke, the right-hand surface of member 70 exposed to driving pressure being greater than the left-hand surface. The central portion of diaphragm 19 is clamped between a rigid plate 80, a soft plate 79 and a rigid plate 78, a bolt 74 clamping the assembly to a spacer 73 and another rigid plate 76, which limits the delivery stroke of the diaphragm to planar position 85 by abutting the righthand face of member 70. On abutting member 70, plate 76 engages a sealing ring 83 to close-off actuating chamber 17 from the diaphragm. Movement of an inlet valve ball 35 in the pumping chamber 18 is controlled by a resilient retainer member 36, and movement of delivery valve ball 46 is controlled by a spring-loaded cage 47. An air release valve 58 in the delivery passage is opened by depressing a knob 60, Fig.3. The actuating piston 15 requires a cup washer 115, Fig.4, mounted on a member 100 between rigid discs 103, 108, with an intermediate seal 107 of elastically extrudable material. Clearance is provided between seal 107 and member 100 into which material of the cup washer can extrude during the return stroke of the actuating piston. A sealing boot 110 clamped between the cylinder and the piston rod prevents entry of air behind the piston, leakage past the piston on the driving stroke returning to the actuating chamber on the return stroke. Additional actuating liquid is supplied to the actuating chamber from a reservoir 120, Fig.1 driving the return stroke via a pipe 121, ball valve 123, Fig.3, and port 124, the clearance between ball 123 and passage 176 being sufficiently small for a very small flow, to ensure the maximum suction stroke of the diaphragm. Excess liquid in the actuating chamber is released through a pressure-relief valve 139 during the delivery stroke, the valve spring loading being adjustable by a screw 142. Air in the actuating chamber is bled off through a ball valve 163 controlled by a knob 165, air bubbles being visible in a transparent tube 167. Actuating piston 15 may be driven by an electric motor through crank 96.
Patent GB-1457139-A (GB)
Title: Method of manufacturing semiconductor device
IPC: H01L27/00
Filed: 1973-09-27
Abstract: 1457139 Semiconductor devices HITACHI Ltd 28 Dec 1973 [27 Sept 1973] 45236/73 Heading H1K A semiconductor device in which an oxide isolation region 7, Fig. 1f, with beak portions 7a-7d, defines a prescribed portion of a semiconductor device, is made by forming a diffused region of a first conductivity type in a layer 3b of opposite conductivity type using the isolation region 7 as a mask, wherein the diffused region has two zones 8, 10a which overlap in the vertical direction and differ in at least one of their dopant concentration, their dopant type, and their time of formation, and the PN junction so formed extends to the oxide region 7. A P-type silicon substrate 1 has an epitaxial layer (3), Fig. 1b (not shown), with a diffused N+ region 2 in it. The device is masked with silicon dioxide and silicon nitride (4, 5) which are selectively etched to provide grooves (3c) which are oxidized to form the isolation region 7 around islands 3a, 3b. Using appropriate masking and etching techniques boron is diffused into the island 3b to form the zone 8 which is a base region and gallium is diffused through the beak portions 7a, 7d to form the zone 10a. Phosphorus is diffused to form an emitter region 11 and a collector region 12 and aluminium electrodes are deposited thereon. In another embodiment, the silicon substrate has an epitaxial layer (20), Fig. 2a (not shown), which serves as one zone contiguous with the diffused zone 8, for displacing the ends of the PN junction. In another embodiment, the epitaxial layer (3) is oxidized through openings in the masks (6a, 6b) to form raised oxide portions 21, Fig. 3d, defining troughs which are filled with N regions 22a, 22b in which boron is diffused to form a region 24 which defines a PN junction below the beak of the oxide portion 21.
Patent GB-959755-A (GB)
Title: Agglomeration and concentration of synthetic latex
IPC: C08F6/14
Filed: 1962-11-30
Abstract: The particles of an aqueous latex of a polymer of a vinylidene monomer are agglomerated by adding thereto a cross-linked poluyrethane in amount from 0.01 to 7 parts per 100 of polymer solids, the polyurethane have a water-solubility at 25 DEG C. of from 0.01 to 10 g. per 100 g. water. The polyurethane may be added as an aqueous solution which may contain an emulsifier, e.g. potassium oleate or a sodium salt of a betanaphthalene sulphonic acid-formaldehyde condensation product. Preferred polymers are polybutadiene, polystyrene, and rubbery and resinous copolymers of butadiene with styrene or acrylonitrile although polymers or copolymers of alpha-methyl styrene, para-methyl styrene, chlorostyrene, vinyl chloride, vinylidene chloride, vinyl pyridine and divinyl benzene are also listed. The latex may be concentrated by the removal of water therefrom.
Patent GB-1200197-A (GB)
Title: Improvements in or relating to centrifugal pumps
Inventor: EDWARDS JOHN
IPC: F04D29/50
Filed: 1967-10-05
Abstract: 1,200,197. Centrifugal pumps. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Oct.5, 1967, No.45506/67. Heading F1C. A centrifugal pump comprises a casing 1 of substantially volute form and having a single inlet port (not shown) coaxial with the impeller 4, an outlet port 6 substantially tangential to the volute, an outlet port 7 substantially radial to the impeller, and spaced from the outlet port 6, and a valve 10 operated by the liquid flow within the casing automatically closing the outlet port 7 for one direction of impeller rotation. During anti-clockwise rotation of the impeller, the liquid is discharged through the port 6, the port 7 being closed by the valve 10 which, as shown, may be a wedge-shaped flap of rubber or resilient plastics material carried by an insert 8 in which is formed the port 7. During clockwise rotation, the valve 10 is open to permit discharge through the port 7, there being little if any discharge through the port 6.
Patent GB-1169187-A (GB)
Title: Gas Treating Apparatus
IPC: B01D47/06
Filed: 1966-10-12
Abstract: 1,169,187. Gas scrubber. WALLACE-MURRAY CORP. 12 Oct., 1966 [22 Oct., 1965], No. 45649/66. Heading B1R. A venturi gas scrubber has a cylindrical section 17 containing a liquid spray convergent and divergent sections 19 and 22 and a cylindrical throat section 18 which has the same diameter as an inlet pipe 16 connected to cylindrical section 17. A second liquid spray may be provided in a cylindrical section 23 following divergent section 22 and the gas and liquid discharged therefrom is passed through a grid 26 before passing upwardly through a droplet-eliminator assembly. In a modification the divergent section of a scrubber may be replaced by a cylindrical extension of the throat section.
Patent GB-1024640-A (GB)
Title: Improvements in radio direction finding instruments
IPC: G01S1/02
Filed: 1963-11-21
Abstract: 1,024,640. Radio direction finders. D. C. A. CROWHURST. Nov. 12, 1964 [Nov. 21, 1963], No. 46028/63. Heading H4D. A hand-held self-contained null position direction finding apparatus comprises, within a casing 10, Fig. 1, a ferrite rod directional aerial 18 feeding a transistorized printed circuit radio receiver 20, and a compass 34 whereby the bearing of the received radio signal may be indicated. The aerial 18 is housed in an upper elongated portion 14 of the casing and the receiver and compass are contained in a cylindrical portion 12 of the casing. The receiver, which is powered by batteries 39, has a tuning condenser 22 with movable vanes moved by gear-wheel 24 and a disc 28, the disc protruding through the casing so as to be externally adjustable. The frequency to which the receiver is tuned is indicated on a scale 26 fixed to gear-wheel 24 and viewable through a window 32 having a vertical-cursor inscribed thereon. The compass has a compass and 35 fixed to the magnets 34 and provided with a transparent graduated turned-down edge 36 which is also viewed through window 26. A push button switch 50 energizes a lamp 54 behind the compass and frequency scales so that they may be viewed in the dark. The audio output of the receiver is listened to by means of ear plug 46, two such plugs being provided for noisy external conditions. A switch 52 energizes a beat frequency oscillator so that audible signals can be heated from received C.W. beacon signals. A volume control is also provided. A pair of sights is provided on top of the elongated portion 14 of the casing.
Patent GB-1400025-A (GB)
Title: Gallium arsenide schottky barrier junctions
IPC: H01L29/872
Filed: 1972-10-05
Abstract: 1400025 Semi-conductor devices MICROWAVE ASSOCIATES Inc 5 Oct 1972 [6 Oct 1971] 46073/72 Heading H1K A Schottky contact is produced by depositing a layer of Au-Ge alloy on an N-type GaAs body while the temperature of the body is held below the eutectic of the alloy. A Schottky diode, Fig. 1, is produced by providing a substrate 11 of N<SP>+</SP>-type GaAs doped with Te with an N-type epitaxial layer 12. A layer 13 of SiO 2  is deposited by reaction of silane and oxygen and a window is etched using a photo-resist. A layer 14 of Au 12 wt. per cent Ge is vacuum deposited and masked and etched to produce the desired contact area which is then plated with a layer 15 of Au. A layer (not shown) of Au-Ge alloy may be deposited on the N<SP>+</SP>-type substrate to provide an ohmic contact. The body is either held at 200-300 C. during deposition of the Schottky electrode or heated at this temperature after deposition at room temperature. The Schottky contact may be used to form the gate of a GaAs FET.
Patent GB-1441745-A (GB)
Title: Manufacture of a pattern on a substrate
IPC: G02B5/20
Filed: 1972-10-06
Abstract: 1441745 Removing material by lasers and ions EMI Ltd 25 Sept 1973 [6 Oct 1972] 46106/72 Heading B3V [Also in Division G2] A light filter pattern on a substrate is produced by coating a substrate 3 with a first layer 2 of filter material and an absorption layer 1 capable of absorbing electromagnetic energy, removing portions of the absorption layer 1 with a beam of electromagnetic radiation to expose parts of the first layer 2, Fig. 2, removing the exposed parts of the first layer 2 to expose the substrate 3 and removing the remaining parts of the absorption layer 1, Fig. 4. In the manufacture of a dichroic filter for a colour television, a glass substrate 3 is coated with an oxide layer 2 of dichroic filter material and a layer 1 of lead. After removing portions of the lead layer 1 with a laser beam, Fig. 2, the exposed filter layer 2 and part of the remaining lead layer 1 are removed by sputter etching (Fig. 3, not shown). The remaining lead layer 1 is removed by a laser to form a pattern of dots or parallel lines of dichroic material Fig. 4. A protective layer 4 of quartz may be applied to the filter and the process repeated using the quartz layer 4 as the substrate.
Patent GB-1115003-A (GB)
Title: Polyureas
Inventor: ALLPORT DENNIS CHARLTON
IPC: C08G18/32
Filed: 1964-11-12
Abstract: The invention comprises polyureas and polyurethanes in which at least 5% of the repeating units (between urea linkages) have the structure <FORM:1115003/C3/1> They may be prepared by reacting a dipiperidyl (which may be mixed with up to 80 mole per cent of another disecondary diamine) with COCl2 in the presence of a base, e.g. an alkali metal hydroxide or carbonate or a tertiary amine e.g. pyridine, or with a bis-carbamyl halide, a bis-urethane, or a diisocyanate of a dipiperidyl or other diamine, or by reacting such a derivative of the dipiperidyl with another diamine, or by reacting a dipiperidyl with a carbonate ester, a chloroformate ester, urea or a mono- or di-alkyl urea, a carbonyl bis-imidazole or a bi-carbamide amine. Particularly elastic polymers may be made by reacting a dipiperidyl with a macromolecular diisocyanate prepared by reacting a low molecular weight hydroxy-terminated polyether or polyester having a glass temperature below room temperature with a diisocyanate to give a hydroxy-terminated chainextended product which is then reacted with further excess diisocyanate to give isocyanate end groups. Other diamines suitable for use in conjunction with a dipiperidyl are listed.  When the polyurea contains residues of a diprimary diamine, it may be cross-linked by reaction with formaldehyde or e.g. a urea-, melamine-, or phenolformaldehyde resin, or an epoxy resin. In examples, 4,41-dipiperidyl is reacted with each of phosgene, piperazine bis-carbamyl chloride, diphenyl carbonate, hexamethylene-, toluylene - and 3,31 - dimethoxy - 4,41 - diphenylene - diisocyanates, and diisocyanates derived from poly (tetramethylene oxide) and from poly (ethylene adipate) treated in turn with toluylene diisocyanate and 4,41-diphenyl-methane diisocyanate, and 2,21-dipiperidyl, in its solid and liquid isomeric forms, is reacted with the bis-carbamyl chlorides of piperazine and 4,41-dipiperidyl, and with hexamethylene-, toluylene -, 3,31 - dimethoxy - 4,41 - diphenylene - and 3,31 - dimethyl - 4,41 - diphenylene diisocyanates. The product of the last reaction is cross-linked with 40% formalin, heated with acetic acid.  The products are soluble in one or more of formic acid, acetic acid, phenol, cresol, tetrahydrofuran dioxan, methylene dichloride and dimethylformamide; reduced viscosities and/or softening or melting points are given for some.  Uses:  melt adhesives, drawable fibres, orientable films, and injection moulding.