baber/WOPTO huggingface dataset:
Patent GB-1390686-A (GB)
Title: Process and apparatus for separating sand from botanical materials
IPC: B07B4/08
Filed: 1972-12-21
Abstract: 1390686 Fluidized-bed separation BRITISHAMERICAN TOBACCO CO Ltd 21 Dec 1972 [21 March 1972] 59005/72 Heading B2H A process for separating sand from botanical material, e.g. tobacco or tea, comprises feeding a mixture of the sand and botanical material to a fluidized-bed column 1 above a support 14, providing a flow of gas, e.g. air, upwardly through the column, conveying the botanical portion of the mixture through the upper portion of the column, and causing the sand to filter to the bottom of the column through the support. The mixture is fed to the column 1 from a hopper 3 via a chute 5, which may be vibratory and may contain a screen 6 for preliminary separation, a hopper 4 and a screw conveyor 2. The column 1 is provided with flexible supports 10, 11 and means 12 for vibrating it. The support 14 includes two wire mesh screens 15, 16 between which are closely packed particles in the form of spherical bodies, which may be made of steel, glass, ceramic or thermo-setting resin. The mixture is maintained in a fluidized state in section 13 of the column by blowing air upwardly through the support 14 or, as shown, by sucking it through by means of a vacuum pump associated with a cyclone separator 31 in which the botanical material entrained with the air is separated therefrom. A control means 21 actuates valves 22, 23 to maintain a steady air flow and, at desired intervals, to superimpose a pulsed flow. The sand which passes through the support 14 is collected in a receptacle 17. A baffle (40), Fig. 2 (not shown), may be provided in the upwardly tapering portion of the column to control air flow and prevent clogging.
Patent GB-1449207-A (GB)
Title: Production of bis -hydroxyphenyl- alkanes
IPC: C07C39/15
Filed: 1973-12-27
Abstract: 1449207 Bis(hydroxyphenyl)alkanes MONSANTO AUSTRALIA Ltd 27 Dec 1973 [29 Dec 1972] 59773/73 Heading C2C The invention comprises a process for the production of bis(hydroxyphenyl)alkanes or bis(hydroxy substituted phenyl) alkanes by condensation of phenols with ketones of the formula R 1 COR 2  where R 1  and R 2  are alkyl, cycloalkyl of 5 or 6 carbon atoms, cycloalkyl substituted by halogen or alkyl of 1-6 carbon atoms, or phenyl or wherein R 1  and R 2  may together be cycloalkyl or substituted cycloalkyl as specified, in the presence of an acidic catalyst and a sulfur compound promoter or ketone precursor which is either a mercaptan of the structural formula (HS) n -R<SP>1</SP>-(X) n  wherein R<SP>1</SP> is a saturated or unsaturated aliphatic hydrocarbon or aryl, X is selected from carboxyl, ester, sulfonyl, hydroxy, amino, substituted amino and salts thereof, and n is an integer from 1 to 3; or a corresponding mercaptal of the structural formula (R<SP>11</SP>CH(SR<SP>11</SP> <SP>1</SP>) 2  wherein R<SP>11</SP> conforms with R 1  and R 2  of the ketone structural formula specified above and R<SP>11</SP> <SP>1</SP> corresponds to the mercaptan structural formula specified above; or a corresponding mercaptole of the structural formula wherein R<SP>11</SP> and R<SP>11</SP> 1 are as specified above, which process comprises metering the ketone reactant into a mixture of the phenol reactant charge, acidic catalyst and sulfur compound promoter or ketone precursor in an azeotropic distillation entrainer medium at reflux temperature in a reactor equipped for azeotropic distillation, whereby water generated by reaction of the phenol and ketone is continuously removed from the reactor azeotropically to maintain the reaction mass under relatively anhydrous conditions, the metering of the ketone reactant into said reaction mixture being either continuous or intermittent and the addition rate of ketone reactant being substantially commensurate with the water of reaction removal rate from the reactor, said mixture of phenol reactant, acidic catalyst and sulfur compound promoter or ketone precursor in the reactor optionally containing a proportion of the charge of ketone reactant in amount not exceeding 0À25 mole per mole of phenol reactant and said metered ketone reactant optionally containing incremental acidic catalyst and/or incremental sulfur compound promoter or ketone precursor and/or incremental entrainer medium, the reaction being brought to the desired stage of completion by refluxing the reaction mass until the crystallization point of the end product in the entrainer medium is reached or an amount of water of reaction has been evolved which corresponds approximately with the theoretical amount generated by the charge of phenol and ketone reactants, and the end product recovered from the reaction mass.
Patent GB-1270497-A (GB)
Title: Improvements in or relating to internal combustion engine fuel injection apparatus
IPC: F02D17/04
Filed: 1970-12-16
Abstract: 1,270,497. Fuel injection pumps. HONDA GIKEN KOGYO K.K. Dec. 16, 1970 [May 21, 1970], No.59812/70. Heading F1A. The inlet valves 6 of a fuel injection pump 3 are prevented from closing by members 7 when the speed of an engine fed by the pump is rapidly reduced. Thus on sudden closure of the engine throttle control, fuel in the pumping chambers is forced back past the inlet valves instead of being delivered to nozzles 4. The members 7 are normally maintained out of engagement with the valves 6 by the pressure of fuel in a supply passage 5 fed by a pump 2, the pressure in the passage 5 being controlled by a valve 15. When the engine throttle is suddenly closed a valve 9 is caused to open, whereby the passage 5 is de-pressurized through lines 17, 16 to allow springs 8 to lift the members 7. The valve 9 is shown as operating in response to manifold pressure but it may also be operated mechanically or electromagnetically in response to the position of the engine throttle control. The pump plungers 11 are reciprocated by a conical cam 12 axially movable to adjust the stroke.
Patent GB-1382257-A (GB)
Title: Communication system
IPC: H04B5/00
Filed: 1971-12-30
Abstract: 1382257 Audible signalling apparatus WESTINGHOUSE ELECTRIC CORP 30 Dec 1971 [13 Jan 1971] 60700/71 Heading G4F [Also in Division H4] For use in a voice communication system transmitting an audio signal through the earth, e.g. between the surface and trapped miners and vice versa, a receiver comprises a loop antenna, an audio amplifier, and an output transducer producing an audible signal; the loop antenna has an output voltage increasing linearly with frequency up to a self-resonant frequency which is above the band of frequencies being transmitted. The transmitter may include an audio frequency power amplifier with a preamplifier and a microphone, and one or more antennas, with a multiple-tapped transformer forming a coupling and matching network between the amplifier and the antenna(s). The antenna may be a long wire earthed at its ends or a large loop. A receiver may be mounted on each miner's  helmet, the loop antenna comprising a number of turns of wire about a ferrite core. The system may also be used for transmitting messages to vehicle drivers using a buried long wire antenna and loop antennas on the vehicles.
Patent GB-635065-A (GB)
Abstract: 635,065. Leakage in valves, discharging. BASTELAERE, G. VAN. Nov. 18, 1946, No. 34151. [Class 135] A valve-lifting member g, Figs. 1, 2, provided with holes and slots i and located in a head f loosely threaded on a fitting b secured in a pipe a, is operated by rotation of the head to unseat a closure member c to allow liquid to flow through the slots i and the interior of the lifting member, the holes serving to permit leakage liquid tending to collect between the head and the lifting member to discharge into the main flow. A vulcanized rubber seating d is retained in the fitting by a threaded bush e.
Patent GB-753527-A (GB)
Abstract: 753,527. Dry plate rectifiers. SIEMENSSCHUCKERTWERKE AKT. - GES. Nov. 24, 1953 [Nov. 24, 1952], No. 32608/53. Class 37. A dry plate rectifier assembly comprises a cera. mic block in one face of which are formed recesses and interconnecting channels, with rectifier elements in the recesses connecting members in the channels and located there by terminals, members fitted in certain of the recesses and having end parts projecting away from the face, and means holding a ceramic cover to the face so as to hold the elements, connecting and terminal members in position. Ceramic base 1 with upstanding rim 21 and four cylindrical recesses 3, 4, 5, and 6 housing the rectifier elements, joined by channels 7, 8, 9 and 10, is covered by ceramic member 2 fitting within pin 21, and having on its lower face upstanding parts corresponding to the recesses and channels. The columns of rectifier elements are connected in series by means of metal strips 9, 19 and 20, the former beneath the columns and the latter two above and bowed outwards between columns so as to be forced into good resilient contact with them when the cover member is pushed home. The parts 1 and 2 are fixed together by rivet 27 passing through central holes in both parts which also holds beneath its head a U-shaped clip 22 the limbs of which after passing through slits in the cover and in the base 25, 26 protude and may be pushed through slits in a chassis and bent over so as to hold the smooth lower surface of the base in good thermal contact therewith.
Patent GB-2001111-A (GB)
Title: Knitting machine
IPC: D04B7/20
Filed: 1978-06-16
Abstract: A flat knitting machine for the transfer of stitches using latch needles (3) without special transfer characteristics, the machine having a movable carriage (6) with a selection member cooperating with needles located in grooves of one needle-bed to distribute them in two cam paths, means (10) for maintaining the latches of the raised needles of one of the two cam paths in the half-open position, and a third cam path to effect the movement of needles (5) of the other bed in order to transfer stitches from needles of the first cam path to the needles of the other bed. <IMAGE>
Patent GB-2004686-A (GB)
Title: Elevated metal bumps for microelectronic circuits
IPC: H01L21/60
Filed: 1978-08-09
Abstract: Elevated metal contact bumps are provided on a microelectronic semiconductor circuit, with the use of aluminum-palladium metallization as a base for selective electroless plating. The aluminum and palladium are preferably deposited sequentially in a single operation, i.e., without exposing the aluminum surface to the atmosphere. The aluminum-palladium film is then patterned in a single step, using an etchant which attacks both metals at substantially the same rate. The metal pattern is then covered with an insulation layer wherein apertures are opened to expose palladium at selected sites for immersion in an electroless plating bath of ionic Cu or Ni for bump formation.
Patent GB-2004478-A (GB)
Title: Improvements in or relating to a combination tool holder
IPC: B23B31/00
Filed: 1978-08-17
Abstract: A combination tool holder is disclosed for detachable securement to a machine tool spindle comprising a basic holder 1 having a cavity 5 extending in axial direction through the whole holder, and an interchangeable adapter carrying a machine tool and being detachably secured to the basic holder via screw bolts holding a flange formation of the adapter in abutment with a terminal flange of the holder. The cavity can be as much as 60% of the volume of the basic holder for weight reduction. <IMAGE>
Patent GB-2006495-A (GB)
Title: Improvements in and relating to remote control apparatus and to toys utilising such apparatus
IPC: G08C23/02
Filed: 1978-10-16
Abstract: Control apparatus is responsive to a command signal received using a non-physical link, preferably acoustic, to control at least one electric motor 18, 19 by producing a pulsed signal dependent on the duration of the command signal and stepping a counter 13 through a number of stages equal to the number of functions to be controlled. The motor is preferably controlled by controlling the mark/space ratio of pulses of current to the motor. The acoustic signal may be produced either directly by the operator e.g. by whistling or speaking or by the operator using a tone generator. The preferred use of the control apparatus is in a toy such as a vehicle or crane. <IMAGE>
Patent GB-2036807-A (GB)
Title: Solutions, concentrates and processes for conversion-coating of aluminium
IPC: C23C22/44
Filed: 1978-11-29
Abstract: Aqueous acidic chromating solutions are here disclosed which as accelerator employ 0.03-3.0 g/l of zinc, together with 0.01-10.0 g/l of hexavalent chromium, 0.01-10.0 g/l of fluoride, 0.02-3.0 g/l of molybdate and sufficient acid to impart a pH less than 7, preferably not greater than 5.5, and desirably in the range 1.0-2.5. Processes for chromating aluminium, especially the high-speed chromating of aluminium coil-stock, using these zinc- accelerated chromating solutions are also disclosed-as too are concentrates for making-up the solutions used in the process.
Patent GB-2039171-A (GB)
Title: Discharge lamp starting circuit
IPC: H05B41/08
Filed: 1979-01-02
Abstract: A switch start circuit for operating an electric discharge lamp on 50 to 60 c.s. supplies is provided with two glow starter switches (5, 11) connected in parallel between the lamp electrodes. The life of this combination of starter switches is substantially greater than that of a single starter. The two starters are preferably housed in a single canister (12) the dimensions of which are preferably the same as those already established for a single starter. A heating resistor can be provided in series with the paralleled starters and inside the canister, to prevent prolonged flashing with a failed lamp. The resistor can be either wound around the glass envelopes of the starters or can consist of two resistors one of which is inside the envelope of one starter and the other inside the envelope of the other starter. <IMAGE>
Patent GB-2068606-A (GB)
Title: Power supplies for electrostatic air cleaners
IPC: G05F1/575
Filed: 1979-09-27
Abstract: A power supply is described for an electrostatic air cleaner, for supplying a current controlled EHT potential to the ionizer. As shown, the actual current (as sensed by resistor 74 in series with the ioniser 56) is compared with a reference 78, to control a series transistor 68. This supplies a high frequency oscillator 66 and thus the EHT output of a voltage multiplier 70. The ioniser is thus current controlled rather than voltage controlled, as acknowledged, to minimize ozone production in the cleaner. <IMAGE>
Patent GB-2046164-A (GB)
Title: Apparatus for Cutting a Moving Sheet of Dough
IPC: A21C15/04
Filed: 1979-04-03
Abstract: Apparatus for cutting a moving sheet of dough comprising a first rotary cutter (12) having a peripheral blade formation for partially cutting or perforating the moving sheet of dough according to the required subsequent division of the sheet into individual baked articles; a second rotary cutter (13) located downstream of the first rotary cutter (12) with respect to the direction of travel of the dough sheet, and having a rotating blade (15) for completely severing the dough sheet at spaced positions thereon, the first and second cutters being interconnected by a chain-driven synchronising means (16, 17) for adjusting the rotational position of one relative to the other; a backing roller (35) for raising and lowering the dough sheet with respect to the second cutter blade (15) thus to cause the sheet to be severed thereby at predetermined intervals, the backing roller being raised and lowered by a fluid pressure cylinder (30) operated by a solenoid operated valve (29) which itself is operated by an electrical switch (28) actuated by a cam (27), the cam being carried by one of a pair of meshing pinions (24, 25) one of which is driven by the second cutter shaft, the ratio of the two pinions determining the intervals of actuation of the electrical switch and thus movement of the backing roller to present the dough for cutting. <IMAGE>
Patent GB-2025104-A (GB)
Title: Train vehicle control multiplex train line
IPC: G05B9/02
Filed: 1979-06-21
Abstract: Automatic control of a mass transit vehicle responsive to a transmitted (coded) signal is effected by decoding the received signal individually at the front end and the tail end of the train. After ascertaining that the signal received at the tail end is genuine and valid, it is transmitted across the length of the train on a pair of wires. If the two signals tally, only then, train control is effected. Two processors are used for the purpose, one at each end of the train. Reliability in automatic control is enhanced by lack of response to spurious or erroneous signals. <IMAGE>
Patent GB-2024969-A (GB)
Title: Sealing a Servo Booster for a Vehicle Braking System
IPC: B60T13/52
Filed: 1979-07-04
Abstract: In a servo booster of the kind comprising a housing 1 locating a diaphragm subject to differential pressures controlled by a valve a tubular valve body 4 is slidably sealed to the housing. Conventionally a separate flexible boot protects the seal but in previous arrangements the boot has prevented inspection of the seal. An integral seal and boot 8 is now provided having a sealing portion 13 located in an annular recess 16 adjacent the free end 19 of the booster housing 1 and a bead portion 10 secured to the free end of the valve body 4. The proximity of the sealing portion 13 to the free end 19 of the booster housing 1 enables the adjacent outer portion 26 of the boot to be depressed and the seal portion 13 inspected. <IMAGE>
Patent GB-2028321-A (GB)
Title: Unsaturated ketones
IPC: C07C49/613
Filed: 1979-08-02
Abstract: Described is a process for the production of alpha, beta unsaturated ketones by reaction of an aldehyde with a ketone in the presence of a catalyst consisting essentially of either zinc acetate or zinc acetate dihydrate. The ketones obtained are suitable and some cases as solvents and in some cases as intermediates for the production of valuable odorants, dyes, plastics and especially nature-identical substances and are also useful as odorants per se.
Patent GB-2033984-A (GB)
Title: Infinitely Variable Cone Pulley Transmission
Inventor: BERENS HEINRICH
IPC: F16H61/662
Filed: 1979-10-18
Abstract: A method of correcting for unwanted transmission ratio variations due to component elasticity and traction belt/chain drift which method involves making very small torque-proportional adjustments to one of the cone pulleys; this can be done by providing a resilient lost- motion arrangement in the mechanisms by which axial movement of the transmission-ratio- selection pulley sheave is achieved, or by providing the normally axially fixed other pulley sheave of a pair with means to move it axially a small amount. As shown, driving and driven pulleys 4, 5 and 6, 7 are adjusted by levers 12, 13 torque-responsive contact pressure between the pulley sheaves and belt or chain 8 is generated by means 40-45, and unwanted changes in ratio as a result of changes of torque are corrected by providing resiliency at 47 in the lever 13. Other arrangements have fluid- pressure operated means for pulley sheave adjustment. <IMAGE>
Patent GB-2047389-A (GB)
Title: Diaphragm valves
IPC: F16K7/12
Filed: 1980-01-07
Abstract: A diaphragm valve includes a compressor (20) having a tapped axial bore (21) leading to a counter- bore (22). Diametrically opposed slots (23) are provided in the bore (21) whereby a PTFE faced diaphragm having a bayonet pin coupling can be secured to the compressor. Also, a rubber diaphragm having a threaded stud coupling can be secured to the compressor using the threaded bore (21). Both types of diaphragm can still be used to service existing valves in which the compressor is adapted only to fit one type of diaphragm. <IMAGE>
Patent GB-2069119-A (GB)
Title: Refrigeration process
IPC: F25J1/02
Filed: 1980-02-13
Abstract: A fluctuating refrigeration demand load, such as is met in the reliquefaction of vapours from stored LNG, is satisfied from a substantially constant flow of compressed gaseous refrigerant by providing a Joule Thomson refrigeration loop in which a part of the compressed refrigerant is condensed, the uncondensed vapour is recycled and the condensate is stored in a buffer vessel, the condensate being withdrawn from the buffer vessel at the variable rate required to meet the fluctuating refrigeration demand load and the vapours formed therefrom being combined with the recycling uncondensed vapour in the refrigeration loop, the supply of refrigerant vapour in the loop for recompression being maintained substantially constant by venting vapour from the system in periods of high refrigeration demand and drawing fresh gaseous refrigerant into the system from an external supply at periods of low refrigeration demand. <IMAGE>
Patent GB-2074647-A (GB)
Title: Impeller shroud for a centrifugal compressor
IPC: F04D29/16
Filed: 1980-04-25
Abstract: The shroud 14 includes a flexible diaphragm 50 which maintains uniform clearance between the shroud and the blade tips 26 of the rotating impeller 12 in order to achieve improved performance at both part and full power operating conditions. The shroud is formed of a rigid, annular, concave portion 30 substantially corresponding to the configuration of the tips of the blades of the impeller, and connected to a fixed, flange support 40 by the diaphragm which extends generally perpendicular to the shaft of the impeller. During operation of the centrifugal compressor, the differential thermal and pressure forces generated along the length of the blades within the compressor cause deformation of the flexible diaphragm and a substantially linear movement of the concave portion 30 relative to the flange support 40. The movement of the annular concave portion substantially corresponds to the change in configuration of the blades, thereby minimizing blade tip losses. <IMAGE>
Patent GB-2081008-A (GB)
Title: Semiconductor annealing
IPC: H01L21/265
Filed: 1980-07-29
Abstract: A process for annealing crystal damage in ion implanted semiconductor devices in which the device is rapidly heated to a temperature between 450 and 900 DEG C and allowed to cool. It has been found that such heating of the device to these relatively low temperatures results in rapid annealing. In one application the device (17) may be heated on a graphite element (14) mounted between electrodes (15) in an inert atmosphere in a chamber (11). <IMAGE>
Patent GB-2082126-A (GB)
Title: Floatable survival device
IPC: B63C9/20
Filed: 1980-08-06
Abstract: A floatable survival device comprises an elongate body 10 internally divided into chambers 13, 15, 16 and 14 for ballast and survival equipment. A mast 23 extends upwardly from the body and carries a radio antenna 27 and a flashing light source 26. The device in the water simulates, i.e. floats in the same path and at the same speed, as a floating man. <IMAGE>
Patent GB-2068046-A (GB)
Title: Window frame and method of installation thereof
IPC: E06B3/263
Filed: 1980-09-16
Abstract: A window unit (10) comprises a wooden sub-frame secured by its stiles (13) to a wall and a glazed metal frame (14) which has a wooden inner frame (22) secured to its inner surfaces and is then inserted into the sub-frame so as to overlap an upstanding rib (31) on the cill (12) but be overlapped by ribs on the stiles (13) and head (11), thus preventing the ingress of rainwater. Sealing material (18) between the metal frame (14) and the ribs also prevents such ingress. The metal frame (14) is retained in the sub-frame by means of beads (25) which are secured to the sub-frame and which abut the frame (22). <IMAGE>