baber/WOPTO huggingface dataset:
Patent GB-1234420-A (GB)
IPC: H01L27/22
Filed: 1968-09-06
Abstract: 1,234,420. Semi-conductor devices. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 6 Sept., 1968 [8 Sept., 1967], No. 42535/68. Heading H1K. [Also in Divisions H2 and H3] A Si Hall effect -element is formed in an N- type island 2 defined in an epitaxial layer by a P-type frame-shaped region 3 extending through the epitaxial . layer -to a P-type substrate. Electrodes 4, 5 extending through apertures in an insulating layer on-the surface of the epitaxial layer carry a current through the material of the island 2, Hall signals being :derived from similar electrodes 6, 7 when a magnetic field is applied perpendicular to the plane of -the element. Only one Hall electrode may be provided, the Hall voltage being derived between this electrode and one of the main current electrodes. The insulating layer may be of silicon oxide or nitride. A buried P-type portion of the epitaxial layer, formed by redistribution of impurities from a pre-diffused region of the substrate, may underlie the N-type island to reduce its thickness. Alternatively the N-type island in which the Hall effect is produced may lie between the P-type substrate and a P-type surface region of the epitaxial layer. Other circuit elements, such as transistors T 1 , T 2  and resistors R 1 -R 3 , or diodes, MIS transistors or capacitors, may be provided in other N-type islands in the epitaxial layer, mutually interconnected by evaporated Al tracks. In the embodiment shown the other elements comprise a simple amplifier -circuit for amplifying the Hall signals, and in a further arrangement the Hall signals are used to control the amplification factor of an -amplifier circuit. The Hall elements, preferably integrated with amplifiers and/or switches, may also be used to control a commutatorless D.C. electric motor (see Division H2).
Patent GB-1239164-A (GB)
IPC: A24F13/06
Filed: 1969-07-18
Abstract: 1,239,164. Cigarette and cigar holders. M. J. DOPPELT. 18 July, 1969, No. 36346/69. Heading A2M. A holder 8 for cigars or cigarettes comprises an outer tubular housing 10 having a plurality of apertures 12 in its wall, a holding member for a cigar or cigarette in the form of a plug 36 having a central bore 52, and an inner hollow porous and absorbent member 30 so formed and positioned within the housing 10 as to form a tortuous or irregular passageway for smoke. A second plug 14, located at the mouthpiece end of the holder 8, may be secured to the housing 10 as shown or may be formed integrally therewith. The absorbent member 30 is formed from a spirally wound tube of flexible fibrous material which is inserted in the housing 10 against the plug 14 and then folded and collapsed on insertion of the plug 36. The housing 10 and the plugs 14, 36 are preferably formed of nylon, the plug 36 including a metal sleeve 54. In use, air enters through the apertures 12 and passes through the wall of the porous member to mix with smoke as it is drawn through the bore 52.
Patent GB-1239181-A (GB)
IPC: C02F3/02
Filed: 1970-01-02
Abstract: 1,239,181. Treating sewage. BECHTEL INTERNATIONAL CORP. 2 Jan., 1970, No. 331/70. Heading C1C. Treating sewage with electromagnetic energy of microwave length.
Patent GB-1239458-A (GB)
IPC: B22D41/50
Filed: 1968-10-30
Abstract: 1,239,458. Casting ladle nozzles. NIPPON STEEL CORP. 30 Oct., 1968 [31 July, 1968], No. 51436/68. Heading F4B. A nozzle for pouring molten metal from a casting ladle or tundish comprises refractory material of a siliceous nature, e.g. pyrophillite, fireclay &c. having longitudinal ridges formed on the inside wall which is impregnated with tar. The ridges may number five to eight and they may be joined by semi-circular arcs and the tar may be pitch or anthracene oil. After being impregnated with tar at 130‹ C. for 10 hours, the nozzles are baked at 130‹ C. for ten hours and are then baked for 7-8 hours at 300-350‹ C.
Patent GB-1239665-A (GB)
IPC: B60L9/00
Filed: 1969-04-09
Abstract: 1,239,665. Control of D.C. motors; control systems for consuming apparatus. MITSUBISHI DENKI K.K. 9 April, 1969, No. 18089/69. Headings H2H and H2J. [Also in Division G3] A load 5 which may comprise a plurality of traction motors is energized from a D.C. source 1 via at least two chopper means 2 energized so that one is rendered conducting a predetermined time after the other one started conducting, and each has a series connected inductor 4. The object is to reduce the ripple in the load and the supply as compared with a single chopper for each motor. The choppers are of thyristor type and as shown are controlled by devices 11 in response to the difference between the actual current in each chopper measured by devices 9 and a single reference pulse generator 13 so as to keep the average current in each chopper constant. A device 12 ensures firing at equally spaced intervals. In an alternative embodiment (Fig. 6, not shown) the " on " time of all the choppers is regulated by a single device responsive to the error in the current in the load and this ensures effective load sharing between the choppers. Flywheel diodes 3 are provided and for traction motors provision is made for regenerative braking.
Patent GB-1257692-A (GB)
IPC: H04B5/00
Filed: 1969-07-28
Abstract: 1,257,692. Inductive signalling; transponder systems. FERRANTI Ltd. 8 July, 1970 [28 July, 1969], No. 37878/69. Headings H4L and H4U.  In a system for automatically determining the position of each of a number of objects within an area 10, each object carries a transponder 41 and the area is divided into four regions defined by inductive loops 21 to 24 separately energized by units 31 to 34 respectively controlled by a circuit 40. As described, all the loops are fed with the same carrier frequency of 150 KHz modulated by a loop identification frequency of 10, 10À5, 11 or 11À5 KHz respectively. This signal is demodulated at the transponder and modulates a signal identifying the transponder, such as 100, 101, 102 KHz &c. This signal then modulates a common transponder carrier frequency of 100 MHz which is transmitted from the transponder to a receiver 42 which demodulates the signal to identify the transponder and the region in which it is located. The interrogation may be arranged to take place at predetermined intervals. Instead of each loop having its own identifying frequency, only one loop at a time may be energized.
Patent GB-1257993-A (GB)
IPC: C08G18/02
Filed: 1969-05-12
Abstract: 1,257,993. Polyisocyanurate foams. MOBAY CHEMICAL CO. 12 May, 1969 [24 May, 1968], No. 24074/69. Headings C3C and C3R. Polyisocyanurate foams are prepared by polymerizing, in the presence of a trimerization catalyst and an inert blowing agent, a mixture of polyphenyl polymethylene polyisocyanates which contains from 10 to 70% of the total methylene groups ortho to one -NCO group and from 2 to 20% of the total methylene groups ortho to two -NCO groups on adjacent aromatic rings. The reaction may take place in the presence of up to 15% by weight based on the polyisocyanate of an active hydrogen compound having a M.W. of 350 to 10,000 and having one to six active hydrogen-containing groups, so as to form a polyisocyanurate methane foam. Suitably the polyisocyanate is prepared by phosgenating an amine mixture prepared by condensing aniline with formaldehyde in the presence of an acid and a catalytic amount of sodium chloride. The trimerization catalyst may be e.g. sodium phenate, sodium trichlorophenate, 2,4,6-tri-(dimethylaminomethyl)phenol and a mixture of 80% ortho and 20% para dimethylaminomethyl phenol. The blowing agent is suitably a halogenated hydrocarbon. Suitably the active hydrogen containing compound has a functionality of 2 to 6 and is a polyether or polyester. Catalysts which cause the formation of carbodiimide groups and foam stabilizers may be incorporated in the reaction mixture.
Patent GB-1258050-A (GB)
Filed: 1968-02-15
Abstract: 1,258,050. Moulding rubber-like inserts. FIBRE RESIN DEVELOPMENTS Ltd. 14 Feb., 1969 [15 Feb., 1968], No. 7548/68. Heading B5A. [Also in Division B7] A protuberance of rubber-like material is provided on the surface of a resin impregnated fibrous article by applying heat and pressure to the article within a mould cavity having a recess therein containing a preform of the material of greater size than the recess, whereby the material is cured in the shape of the recess and attached to the article by penetration of the fibrous structure thereof. The moulding is described of cylindrical spigots adjacent each comer of a rectangular automobile door trim panel, whereby the panel is attached to the interior of a metal door. Pre-cut lengths of a cylindrical extruded nitrile rubber composition are inserted into cylindrical recesses of slightly shorter length in a female mould half. A panel preform, comprising cellulose fibres suction deposited with 20% phenolic resin from an aqueous slurry, was inserted into the mould cavity and pressure was applied between the female and a male mould halves as these were heated, whereby the preform was densified and the resin and rubber cured. Dish-shaped protuberances may also be provided, and the resin may comprise thermoplastic styrene/ butadiene. A preshaped metal member may be resiliently attached to the article by the protuberance by locating the member within the recess prior to the introduction of the rubber.
Patent GB-1258505-A (GB)
IPC: B64C27/02
Filed: 1969-03-25
Abstract: 1,258,505. Helicopter rotors. VIKING AIRCRAFT CORP. 25 March, 1969, No. 15602/69. Heading B7W.  A rotary wing system 36 for an aircraft 10 comprises a hub assembly 70, Fig. 5, mounted for rotation about an axis which may be tilted relatively to the aircraft, a number of blades 96, 97, 98 connected thereto by rigid spars 102 and ball-joints 99, 100, 101, Fig. 4, a rotating blade pitch control means 130 with pitch links 158, 159 attached by universal joints to respective arms 146, 147, 148 of the pitch control means 130 and to the blades at points 151 spaced from the pitch change axis of the blades. The system is mounted on a mast 34 extending substantially from the centre of gravity of the aircraft 10 preferably of the autogyro type. In the embodiment of Figs. 4 and 5, a tubular member 40 is mounted by means of a ball joint 60 on the mast 34 and the hub assembly 70 is mounted by means of bearings 74, 76 to rotate about the tubular member 40, the rotary wing system 36 being tiltable to the side by means of cables 66, 68, Fig. 4, to provide lateral control, and forward or backward by cables 67, 69 to provide pitch trim of the aircraft. The pitch control means 130 may be pulled down by a manually controlled cable 166 against a spring 136 to alter the collective pitch but cyclic pitch control is not provided. This arrangement substantially reduces flapping as, when the advancing blade 97  is pushed up, the pitch control will rotate it into a lower pitch angle so that the lift is reduced. For a jump take-off the blades may be prerotated in their full feather position by supplying compressed air or exhaust gases through the centre of the shaft 38 and tubular spars 102 in the wings to nozzles 120, Fig. 3, in the blade tips and then the pitch control cable 166 is released thereby changing the blades to maximum pitch. In an alternative embodiment, Fig. 8, a shaft 168 is fixed to the mast 34 and connected by a ball-joint 60 to the inner portion 178 of the hub about which the outer portion of the hub, carrying the blades, rotates on bearings 74, 76. The blades are controlled in cyclic and collective pitch by a conventional swash plate assembly 214. The system 36 may be powered or prerotated by means of a drive shaft 252 which drives the hub 170 through gearing 260. A gear drive or compressed gas propulsion may be used to rotate the blades in either form of the invention. The rotor may have three or more blades.
Patent GB-1266529-A (GB)
IPC: H01J29/45
Filed: 1969-06-12
Abstract: 1,266,529. Image pick-up tubes; semiconductor devices. ENGLISH ELECTRIC VALVE CO. Ltd. 12 June, 1969, No. 29737/ 69. Headings H1D and H1K. A camera tube for -converting an infra-red image into video signals comprises a semiconductor layer 8, Fig. 2, on one surface of which is provided drain electrodes 10 and source electrodes 12, and the other surface of which is arranged adjacent a pyro-electric layer 7 (with intervening insulation 9 if necessary) on to which the image is projected through a transparent conduction electrode 6 and which forms the gate electrode for the array of field-effect transistors. In the arrangement shown in Fig. 2 the drain electrodes 10 are formed by a mesh which is connected to an output terminal, and the source electrodes 12 are extended to form mutually insulated pads over the insulation 11; the pads are scanned by an electron beam and output signals may be derived either from the common drain electrode 10 or from a returning electron beam. As an alternative all the drain electrodes of each row are connected together to respective output terminals and all the source electrodes of each column are connected together to respective output terminals, and scanning is effected by sequentially applying potentials to the co-ordinate conductors. The radiation image must be interrupted regularly by a shutter arrangement to allow the heat to be conducted away, otherwise the output would correspond to an image integrated over a period of time. The pyro-electric layer may be of strontium barium niobate, the semi-conductor may be cadmium sulphide for N-type conductivity or tellurium for P-type conductivity, the insulation may be silicon monoxide, and the metal electrodes may be of gold, aluminium or chromium according to the choice of semiconductor material.
Patent GB-1267060-A (GB)
IPC: B42C15/00
Filed: 1969-08-05
Abstract: 1,267,060. Bookbinding apparatus; folding edges of sheet material. N. B. HOBBS. 6 Nov., 1970 [5 Aug., 1969], No. 39176/69. Addition to 1,101,252. Headings B5K and B5N. [Also in Divisions A4 and B6] A machine for manufacturing book jackets as described in the parent Specification is modified for producing stamp mounts or picture mounts in that the last set of rollers 43, 44 is followed by a longitudinal slitter 51 which slits the composite strips 14, 21 into two strips. The paper strip 14 may be provided with a double-sided pressure-sensitive adhesive tape 53 which is protected with a releasable strip. The strip 21 is made of a stiffer polyvinyl chloride, polystyrene or cellulose acetate foil whose plasticizer content is two or nil.
Patent GB-1289257-A (GB)
IPC: A01D34/02
Filed: 1971-05-28
Abstract: 1289257 Apparatus for clearing dykes B R MOYSES and D MOYSES 28 May 1971 17971/71 Addition to 1269448 Heading A1F [Also in Division E1] The drive to the reciprocating cutter bar of the roding bucket of the Parent Specification is modified by having connecting rod 50 connected to a block 54 fixed to the cutter bar 60 and sliding between wear plates 58, 61 removably secured in housing 56. The drive has a protective cover and oil from the reservoir may be fed to any of the moving parts of the drive. The fixed knife bar 64 may have V-shaped teeth 65 each associated with a fixed finger 67 to form a slot through which reciprocates a moving tooth 62.
Patent GB-1295051-A (GB)
IPC: E02B3/26
Filed: 1969-01-23
Abstract: 1295051 Marine fenders ANDRE RUBBER CO Ltd 21 Jan 1970 [23 Jan 1969] 3862/69 Heading B7S A fender 14 is mounted for movement towards and away from a forward edge of a jetty 11 against the action of an elastomeric tension spring 19. Shaft 18, supported by brackets 15 on the fender which extend rearwardly of the forward edge) mounts one end of the spring for movement with the fender and shafts 13 secured to the jetty by pairs of plates 12 mount the other end of the spring so that in movement of the fender towards the jetty shaft 18 and shafts 13 move away from one another to extend the spring. In the embodiment shown the fender is driven flexible piling and the spring is an endless band.
Patent GB-1296140-A (GB)
IPC: B30B1/16
Filed: 1970-04-10
Abstract: 1296140 Casting machines INTERNATIONAL PRESS DEVELOPMENT ESTABLISHMENT 10 April 1970 [16 July 1969] 17224/70 Heading B3F [Also in Division B5] A press for a die casting machine having a mobile plate 3 and two stationary plates 1, 2, comprises a plurality of toggles 8, 9 movable with the mobile plate 3, each toggle including a shorter arm 10 pivotally connected to the mobile plate and a longer arm 11 which has a free end hinged to a guide member 16 for guidance of the free end to and from a seat 30 on the plate 1, the guide member 11 being pivotally connected to a support on the mobile plate. As shown, the guide members 16 are pivoted to the cylinder of a ram 18 whose piston rod 22 is connected by short rods 26, 27 to extensions 28 of the arms 10. Opening and closing of die members 2<SP>1</SP>, 3<SP>1</SP> is effeeted by hydraulic rams 6, 7 locking pressure being applied through the toggles by the ram 18. When the toggles are in their retracted position they can pass upwardly through a hole 29 in the plate 1.
Patent GB-1296632-A (GB)
IPC: F15B5/00
Filed: 1971-04-19
Abstract: 1296632 Fluidic gauge for detecting presence of surface A B MECMAN 19 April 1971 [11 March 1970] 21842/71 Heading G1M A device for detecting the presence or absence of a solid object or liquid surface, comprises two coaxial tubes 2, 3, the inner 2 connected to a pressure sensitive means, the outer for connection to a source of pressurized gas, the annular passage 3 between the tubes having at least one helical rib 5 to impart a rotary motion to the expelled gas so that a cylindrical or conically diverging air curtain may be obtained. As described the annular passage 3 contracts towards the outlet to accelerate the gas as it leaves. The rotary motion is stated to delay or prevent collapse of the annular gas jet into the central space so that objects may be detected at 20 to 30 mm.
Patent GB-1301849-A (GB)
IPC: A61K9/20
Filed: 1969-12-15
Abstract: 1301849 Sustained release medicament UZINA DE MEDICAMENTE BUCURESTI 16 Jan 1970 [15 Dec 1969] 61065/69 Heading A5B A sustained release tablet comprising an inert matrix of polyethylene and an active ingredient retained therein is made by compressing the active ingredient in finely powdered form with polyethylene made by the sodium amyl-catalysed polymerisation of ethylene. Optionally there may also be included polyvinyl pyrrolidone and polyethylene glycol 6000, a water-soluble salt or a surfactant, all of which modify the release characteristics.
Patent GB-1302536-A (GB)
IPC: A61M1/00
Filed: 1969-11-05
Abstract: 1302536 Haemodialysis unit AVON RUBBER CO Ltd 4 Nov 1970 [5 Nov 1969] 54275/69 Heading B1X Blood is submitted to dialysis in a unit comprising one or more flexible tubes 40 of semipermeable material, e.g. regenerated cellulose, coiled with a sheet 42 of plastics material which has ribs 50 projecting from both sides of the sheet, the ribs on one side being parallel to each other and at an angle to those on the other side. In operation, blood is passed through tubes 40 via inlets 46, and dialysis liquid is passed upwardly between the turns of sheet 42 and, since the tubes 40 are flattened against the ribs 50, the dialysis liquid flows through a plurality of spiral channels partly bounded by the walls of tubes 40. The tubes 40 and sheet 42 are coiled about a cylindrical former 44; and the assembly is placed in a transparent containing-vessel (not shown), there being an inflatable collar between the periphery of the assembly and the vessel. The ribbed sheet 42 is made of polyethylene by calendaring and subsequent profiling, or by extruding and subsequent profiling.
Patent GB-1309889-A (GB)
Title: Microwave oscillator
IPC: H03B9/14
Filed: 1971-12-23
Abstract: 1309889 Varactor tuned semi-conductor oscillators; frequency modulation MULLARD Ltd 23 Dec 1971 59967/71 Headings H3T and H3R] A microwave oscillator has a varactor semiconductor element V connected across the end of a length of coaxial transmission line E, A, M and has a semi-conductor oscillator element B connected across the line at a position spaced from the varactor element by substantially a quarter wavelength at a frequency within the operating band of the oscillator whereby in operation the series resonance of the varactor is transformed by the quater wavelength section between the elements V, B to appear at the plane of the oscillator element B as a parallel resonant circuit. The varactor V may be a P<SP>+</SP>NN<SP>+</SP> avalanche diode and the oscillator element B may be a negative resistance semiconductor device such as a Gunn effect or IMPATT diode. The metal portion of the coaxial line may be of aluminium with the inner conductor portion M of brass. Between the conductor M and an output conductor M is an impedance matching portion T. The conductor P may be of aluminium and has an anodized surface so as to provide D.C. isolation between the conductors M and P. An insulating sheet R provides D.C. isolation between E and A. A spring K connects a bias voltage from G to the conductor M so that the varactor V is biased between E and G and the oscillator element B is biased between A and G. The oscillator element B is mounted on a detachable member N. Heat from the element B may be dissipated by cooling fins. The end portion E and inner conductor M are removable so that by fitting different length portion E and conductor M the frequency range of the oscillator may be changed. In a modification to reduce the effect of the distributed impedance of the varactor encapsulation the varactor V is partly embedded into the end wall of the portion E (Fig. 3, not shown).
Patent GB-1311769-A (GB)
Title: Endless conveyor belts
IPC: B65G17/06
Filed: 1970-06-02
Abstract: 1311769 Chains BRITISH WEDGE WIRE CO Ltd 28 May 1971 [2 June 1970] 26472/70 Heading B8A [Also in Division F2] A conveyer chain comprises corrugated shaped strip links 1 interconnected by transverse rods 2 the ends of which are bent parallel to the links and embraced by clips 3 located in notches 4 in the outermost corrugated flanks of the links 1, the clips being U-shaped (Fig. 4) with the free ends of the legs 5, 7 bent inwardly towards each other after having passed through the notches 4. The clips 3, which may be of mild steel, bronze, brass or stainless material, prevent the rods 2 rotating relative to the links 1 and additionally form a clean edge enabling the conveyer sideguided thereby. (For Figures see next page.)
Patent GB-1321103-A (GB)
Title: Tie rod end pieces
IPC: E04G17/065
Filed: 1970-05-01
Abstract: 1321103 Wall shuttering RAPID METAL DEVELOPMENTS Ltd 19 April 1971 [1 May 1970] 21019/70 Heading E1S [Also in Division F2] A tie rod end piece comprises an elongated nut 10 encircled by a sleeve 13 formed integrally with a skirt 14 of flexible material to provide an annular gap 15. The cup-shaped member 12 formed by the sleeve 13 and skirt 14 is moulded of synthetic resin around the nut 10 which has a groove 16 into which the resin flows. The tie rod is for assembling shuttering for casting concrete and the construction of the end pieces allows them to be reclaimed after the concrete has set.
Patent GB-1324590-A (GB)
Title: Hydraulic or air emergency brake system
IPC: B60T11/34
Filed: 1972-04-11
Abstract: 1324590 Brakes; valves F J TOOMEY 11 April 1972 16529/72 Headings F2F and F2V Brake-actuating wheel cylinders 29 are fed alternatively from separate sources 8, 17 through a differential valve 22 which has a sliding pistonvalve 24 which moves to the right (shown dotted) to allow passage of emergency fluid from 17 if the main source 8 fails. A biasing spring may be included. Both main and emergency cylinders are of dual type, feeding front and rear brakes separately (Fig. 1, not shown). The emergency cylinder may be hand or foot operated, e.g. by the simultaneously acting lost-motion linkage shown in Fig. 4. The system may be hydraulic or pneumatic. It is described (Fig. 5, not shown) how the system may be applied to a tractor/ trailer air brake in which the normal foot master air valve (41) is supplemented by a manual emergency hand valve (82) through Tee valves (47, 52, 60, 61, 75 and 76) operating differentially.