baber/WOPTO huggingface dataset:
Patent GB-1480342-A (GB)
Title: Pyroelectric camera tubes
IPC: H01J31/49
Filed: 1973-10-29
Abstract: 1480342 Image pick-up tubes ENGLISH ELECTRIC VALVE CO Ltd 12 Sept 1974 [29 Oct 1973] 50154/73 Heading HID [Also in Division H4] A method of operating a pyroelectric camera tube, having a high resistivity target and preferably evacuated to less than 10<SP>-6</SP> torr, in the mode in which the electron beam side of the target is maintained near cathode potential and is driven thereto by the scanning beam, includes the step of applying to the target for a predetermined time an increasing ramp voltage, and at the termination of the ramp voltage neutralizing the resulting electric field established across the target. As described, the ramp voltage is allowed to rise for 20 seconds, Fig. 3, at a rate of 5 volts sec.<SP>-1</SP>, so that the substantially constant grid controlled scanning beam, at any point of the screen, neutralizes the 0À2 volt increase arising from the ramp voltage during one frame of 1/25th second, modified by potential variations of the scanned surface produced by the thermal image. The 0À2 volt ramp increase permits negative as well as possitive charge images to be sensed. At the end of the 20 seconds, the signal side of the target is pulsed to 240 volts, Fig. 3, for 1/25th seconds, whereby the beam-facing side of the target is discharged by secondary emission, the process being speeded by simultaneously pulsing the gun grid to increase the beam current. Thereafter, the electron beam is pulsed off for 1/50th second while the signal side of the target is returned to zero voltage preparatory to commencing a fresh cycle. Optionally, during the discharging phase of the cycle the beam may be defocused by pulsing a gun anode, and upon return of the signal side of the target to zero voltage the gun may again be pulsed to a high beam current, for 1/25th second, to ensure accurate and uniform return of the scanned surface to cathode potential. In the event of an intense thermal image producing negative clipping of the signal, the ramp rate may be temporally increased to permit reading off the charge completely. Reference is made to a prior art camera tube in which, instead of applying a ramp voltage, a gaseous filling of hydrogen or helium is employed, which as a consequence of ionization by the electron beam raises the target surface to about 0À05 volt positive.
Patent GB-1205829-A (GB)
Title: Vanilla bean drying and curing
Inventor: KARAS ALBERT JOSEPH
IPC: A23L27/14
Filed: 1968-10-23
Abstract: 1,205,829. Curing and drying vanilla beans. McCORMICK & CO. Inc. 23 Oct., 1968 [27 March, 1968], No. 50200/68. Heading A2Q. Mature green vanilla beans are first cut into pieces, e.g. half an inch long; the pieces are then cured within a heated enclosure and dried in two stages, viz.: at an elevated temperature in a current of heated air, and then in air at about room temperature and ambient humidity, to produce dried and cured vanilla bean pieces having a vanillin content of about 0.40 g/dl and a moisture content of about 20-25 per cent by weight. The hot-air drying is continued until the moisture content of the bean pieces is reduced to a value at which it is stated that much more rapid drying, which would tend to overdry the beans and reduce their vanillin content, commences, this value being said to be about 35-40 per cent by weight. Apparatus for carrying out the process comprises cutting means, a plurality of stackable perforated trays for receiving the bean pieces, at least one curing tank enclosable about one or more stacks of trays and adapted to be maintained at about 140F. for 70-78 hours, a rotary, forced hot air drier constructed and arranged to receive the cured bean pieces, for lowering their moisture content to 35-40 per cent by weight, and a conditioner comprising at least one perforated tray for containing the partially dried bean pieces and a fan arranged to blow ambient air through the perforated tray and the contained bean pieces. After the beans have been cut and before being received in the stackable trays, the bean ends and some of the split pieces of the beans, which are said to have a low vanillin content, are removed by passing the beans over a perforated sheet through which the ends and split pieces fall.
Patent GB-1490539-A (GB)
Title: Method of shaping of a metal work-piece and a device for carrying out the method
IPC: B21J15/00
Filed: 1974-11-20
Abstract: 1490539 Riveting VYSKUMNY USTAV MECHANIZACIE A AUTOMATIZACIE 20 Nov 1974 [23 Nov 1973] 50337/74 Heading B3U A workpiece, e.g. rivet head, is shaped by a cylindrical tool 62, Fig. 7, which performs a compound oscillating and rotary motion. The oscillating motion takes place in a plane passing through the axis 96 of the rivet and can be of variable amplitude. By rotating the plane about the axis 96, the rotary motion is obtained. The resulting curved path of the point of contact between the tool and rivet head can have a constant amplitude (the path in thin line, Fig. 1) or a varying amplitude (in thick line). One apparatus, Fig. 9, for driving the tool 62 includes a tool holder 57 carried in a bar 54. The bar is guided by rollers 52 in the curved track 50 of a holder 49, the holder being rotatable by a shaft 22. The bar is coupled by transverse pins 56, 89 to two slides 27 and 43 arranged eccentrically relative to the tool axis 99. The slides engage with diametral tracks 27, 43 in concentric rotors 24 and 45 and also engage with eccentric grooves 70, 71 in a central rotor 69 (which is rotatable by a further shaft 21). The tracks and grooves constrain the slides to move in paths determined by the relative drving speeds of the shafts, and thereby control the oscillating and rotary movement of the tool. The tool may have a flat working surface to operate on a convex rivet head, or may itself be of convex shape.
Patent GB-1526289-A (GB)
Title: Geophone and method of checking characteristics of the same or of a seismic string comprising such geophone
IPC: G01V13/00
Filed: 1975-12-09
Abstract: 1526289 Geophones SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV 9 Dec 1975 50420/75 Heading H4J [Also in Division G1] A geophone comprises switch means for suppressing take-off of electric signals from output terminals of the geophone when the position of the geophone deviates a predetermined degree from its operative position. As shown in Fig. 1, the switch comprises a housing 36 containing a volume of mercury 37, an electrode 38 connected to one output terminal 17 and a ring electrode 39 connected to the other output terminal 18 such that when the geophone deviates the predetermined degree the terminals 17, 18 are short-circuited. The transducing element is in the form of a vibratably mounted coil 24 arranged in the field of a fixed ring magnet 22. In the embodiment shown in Fig. 5, the transducing element is in the form of a pair of piezoelectric discs 70, 71 acted upon by a spring mass 72, and the switch comprises a ring electrode 92 connected to the output terminal of the disc 70 and a pendulum-like electrode 93 connected to the output terminal of the disc 71 so that these terminals are short-circuited when the geophone deviates the predetermined degree. As described with reference to Figs. 3 and 4 (not shown), the switch may be designed to break a connection between the measuring element and one of the output terminals when the geophone deviates the predetermined degree. For seismic exploration, a plurality of geophones according to the invention are connected in series in a string. By incorporating switches of the type shown in Figs. 1 and 5 in each geophone, the characteristics of each geophone may be tested by positioning all the geophones but one to shortcircuit their terminals and measuring the characteristics of the one geophone. Each geophone is tested in turn in this manner: Alternatively a plurality of geophones according to the invention and having switches of the Figs. 3 and 4 type are connected in parallel to form a string and again each geophone may be tested by positioning all the other geophones to break their connections. As shown in Fig. 6 a plurality of groups 100, 101, 102, of strings of geophones 103-106 are provided for seismic exploration. To check the correct positioning of all the geophones, the electrical resistance of each group of strings is measured and compared with a reference. If the measured resistance of any group deviates from the predetermined value, each string of that group has its resistance measured and compared with a reference value. The string or strings whose resistance deviates from the predetermined value, then has the position of each of its or their geophones checked.
Patent GB-1417153-A (GB)
Title: Window repairs
IPC: E06B7/28
Filed: 1972-11-02
Abstract: 1417153 Laminating method JOHN M WADDS (BUILDING & GLAZING) Ltd 26 Nov 1973 [2 Nov 1972] 50526/72 Heading B5N [Also in Division E1] A method of repairing a window comprising applying adhesive to a sheet of glass and applying it to the broken pane. The adhesive is also applied to the pane and is silicone, epoxy resin or polysulphide based, e.g. silicone silicate.
Patent GB-507192-A (GB)
Abstract: 507,192. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd. Jan. 6, 1938, No. 422. Convention date, Jan. 12, 1937. [Class 40 (iv)] A circuit or switch tests for the presence of both A.C. and D.C. potential on a desired or idle line of a group, the D.C. responsive device serving to prevent double connections. The D.C. responsive device may be connected up on response of the A.O. device or both may be effective simultaneously, the same or separate test wipers being used. The invention is described in connection with calling line identification equipment, such as that described in Specification 440,348, for automatic ticketing machines. In the arrangement shown in Fig. 1, switch ILF forming part of the identification equipment is started, by means not shown, in response to A.C. transmitted backwards over a fourth wire from the circuit associated with the ticketing machine. Switch ILF hunts for the presence of A.C. which is received by a tuned thermionic valve circuit and operates anode relay A whereby the switch is stopped and a relay Dt is connected up to test for D.C. potential applied over choke RC. Relay Dt operates only if no other switch is standing on the same terminals and energizes Dh which shortcircuits the high resistance winding of Dt. If A is energized and Dt is not, a circuit (not shown) is completed for re-starting ILF. In the modification shown in Fig. 2, D.C. test potential is supplied over a separate wiper and resistance R. Relay A operates B followed by Dt which connects up double-test relay Dh, this relay remaining inoperative if another switch has stopped on the same outlet in which case So completes a fresh circuit for switch magnet ILFM, the original circuit having been opened by A. In a further modification also using separate test wipors, Fig. 3 (not shown), the circuit of the switch magnet is controlled by both relays A and Dt which are effective simultaneously and in such a manner that both must operate to stop the switch. This avoids unnecessary stopping of the switch on outlets which, although seized by another switch, have not yet had A.C. removed from them. Specification 484,568 also is referred to.
Patent GB-1520730-A (GB)
Title: Combination of a thyristor chain and a test device
IPC: G01R31/26
Filed: 1975-12-11
Abstract: 1520730 Testing thyristors in situ ASEA AB 11 Dec 1975 [12 Dec 1974] 50794/75 Heading G1U A thyristor forming part of a rectifier or inverter comprising a plurality of series-connected thyristors each paralleled by a potential dividing arrangement, is tested in situ as to leakage current by fixing appropriate terminals on to the rectifier or inverter so that a test unit including a power source and a current or voltage measuring instrument can readily be attached to the rectifier or inverter in such a way that leakage current can be measured. The principle of the invention is shown in Fig. 1, in which a rectifier or inverter including a thyristor 1, a control circuit 2, and a divider 3, 4, 5 has terminals 7, 8, 9 fixed to it, so that a test unit 6 can readily be attached, the test unit being adapted to apply a test voltage across terminals 7, 8, and to measure the voltage across terminals 8, 9. Knowing the value of the resistor 3, through which any anode-cathode current will flow, and the value of the test voltage, the leakage current and anode-cathode potential can then be found. In the preferred embodiment, the test unit Figs. 5a, 5b (not shown) is arranged to clip on to an insulating block 12, Fig. 4, so as to make connection with terminals 7', 8' and 13', and so as to close a current transformer around a conductor 10. The test unit includes a circuit Fig. 6 (not shown) whereby a rectified A.C. voltage, of selectable polarity, can be applied across terminals 7', 8', and thus across the thyristor, and a current measuring device. The test unit may also include means whereby the test voltage, the leakage current, and also the contemporaneously applied gate voltage from the control unit 2, can be recorded for subsequent evaluation, or, it may itself issue a warning signal if a thyristor is out of tolerance.
Patent GB-1407274-A (GB)
Title: Separator
IPC: C02F11/12
Filed: 1972-11-07
Abstract: 1407274 Sedimentation separator GUSTAVSBERGS FABRIKER AB 7 Nov 1972 [12 Nov 1971] 51387/72 Heading B1D In a sedimentation apparatus having a plurality of inclined plates 7 with vertical extensions 7a liquid passes from pipe 3 by way of feeding channels 5 through inlets 6 and flows up laminar channels 8 to outlets 10. Outlets 10 have adjustable regulating plates 12 fitted over them by bolts 15 passing through slots 14. The plates 12 are adjustable to compensate for lack of levelness in the apparatus and consequent unequal flow through the channels. The plates 12 may have circular, square or pentagonal apertures or be in the form of an adjustable weir. The liquid leaves the apparatus by conduit 17, sediment passing out of the lower end of the channels into an enclosing sedimentation tank. The apparatus may be used in sewage treatment.
Patent GB-1031590-A (GB)
Title: Bearing assembly
Inventor: PRATT LESLIE JAMES
IPC: F01D25/18
Filed: 1964-12-18
Abstract: 1,031,590. Lubricating. ROLLS-ROYCE Ltd. Dec. 18, 1964, No. 51649/64. Addition to 996,112. Heading F2A. [Also in Division F1] The bearing assembly claimed in the parent Specification includes a cylindrical member 40 (Fig. 3, not shown) projecting up into an annular lubricant reservoir 34 and having a bore 42 connecting the reservoir and the other outlet duct(s) 43, and also includes a lubricant restrictor member 51 having a sinuous passage in its outer axially extending surface with end passages 53, 58 communicating respectively with the reservoir and with a radial drilling 66 connected by space 70 to the selected outlet ducts 71. The sinuous passage comprises alternate parts respectively extending axially and circumferentially.
Patent GB-1572300-A (GB)
Title: Process for dyeing polyester materials
IPC: D06P1/673
Filed: 1977-12-13
Abstract: Described is a process for dyeing polyester materials, or mixtures thereof with other fibres, by the exhaust method from an aqueous liquor, in which process the liquor contains at least 0.2 percent by weight, relative to the material, of at least one alkaline-earth metal salt, aluminium salt or organic ammonium salt of a mono- or polyvalent aliphatic organic acid or of a mono- or polyvalent inorganic acid. Preferably calcium chloride or magnesium chloride are used.
Patent GB-472039-A (GB)
Title: Improvements relating to combined electric lamps and generators
IPC: B62J6/08
Filed: 1937-02-05
Abstract: 472,039. Dynamo lamps for cycles. RAWLINGS, G. W. Feb. 5, 1937, No. 528/36. [Classes 39 (ii) and 75 (iii)] In a combined electric lamp and generator for use on pedal cycles and motor-cycles, wherein the body of the generator is rigidly combined with the casing for the lamp and its reflector, and the casing is pivotally mounted on a bearing and provided with means so that the driving pulley of the generator can be kept in engagement with the road wheel of the cycle, the bearing 11 for the pivot 13 of the lamp casing 10, and the spring 19 for pressing the driving-pulley 28 against the wheel of the cycle, are located within the casing. The pivot 13 is inserted through a bush 12 in the bearing 11 and adjusted longitudinally by nuts 15, a nut 17 being provided for clamping it in position on the cycle. The spring 19 surrounding the bearing 11 has one end located in a hole in the casing, its other end being hooked around a lever 14 which is secured on the inner end of the pivot 13 and adapted to be engaged by a resilient plate riveted on the inner wall of the casing, a push-button being provided to disengage the resilient plate from the lever 14 to allow the spring 19 to swing the casing and bring the driving-pulley into engagement with the cycle wheel. The detent is re-engaged when the pulley is pulled away from the wheel. A cylindrical housing 20 on the underside of the casing 10 receives the parts of the dynamo, which is arranged so that its axis is offset and arranged radially relatively to the cycle wheel when in its operative position. The inner end cover 23 of the dynamo is secured against a flange 21 in the casing by an annular magnet 22 which is clamped in position by an elongated bearing member 24 screwing into the housing 20. One end of the winding of the dynamo rotor is earthed to the casing, while the other end is connected to a contact thimble 27 secured on insulating bushes 26 on the inner end of the dynamo shaft 25 adjacent to a contact spring 31 which bears on the thimble 27. This contact spring is mounted on insulating washers on the cover 23 and connected to a contact spring 32 which bears on the centre contact of the main lamp bulb 54. A lead 56 to a rear lamp bulb and a lead 57 to a shunt resistance for optionally dimming the bulb 54 are also connected to the contact spring 31. The bulb 54 is mounted in a metal bush 52 in the reflector 51, which also carries a pilot bulb 55 within a bush 53. The pilot bulb is adapted to be lighted independently by a battery or accumulator to which it may be connected by a rotary switch arm 40 operating over contact-studs 42 on an insulating plate 37, one contact-stud being arranged to connect the shunt resistance across the dynamo.
Patent GB-1384806-A (GB)
IPC: G06K13/08
Filed: 1972-11-17
Abstract: 1384806 Pneumatic card reader INTERNATIONAL BUSINESS MACHINES CORP 17 Nov 1972 [22 Dec 1971] 53156/72 Heading G4H  A pneumatic card reader has a hopper 24 for perforated cards, pick rolls 42 for moving cards into a pneumatic read station 26, and a stacker 28 for read cards. The cards (Fig. 21, not shown) have a print area and three tiers of punched holes and are stacked in hopper 24 with the print areas towards the bottom of Fig. 4. An electrically controlled pneumatic actuator 160 (Figs. 5-9, not shown) is actuated for each card to be read to move motor driven pick rolls 42 through apertures 40 to engage with the lowermost card and move it through canted rollers 114, 116 (which hold the card against a rail) to read station 26. In the read station 26 the card is pressed against a rail by a spring (Fig. 13, not shown) and a column of holes corresponding to the punched columns of the card receive compressed air. If there is a perforation, a corresponding electric switch is set (94, Fig. 14, not shown) and the data on the card is read out in this way. Rollers 122, 124 move the card into stacker 28 and, when the stacker is full, the  motor and reader are stopped. The actuator 160 and part of the reader may be plug in units.
Patent GB-1129098-A (GB)
Title: Improvements in or relating to pyrophoric lighters
IPC: F23Q2/167
Filed: 1965-12-15
Abstract: 1,129,098. Gas lighters. A. AFFOLTER. 15 Dec., 1965 [19 Aug., 1965], No. 53285/65. Heading F4F. A gas lighter comprises a cylindrical casing 1 formed with a fuel reservoir 2 and a central peg 3 through which the fuel passes up a nylon wick 32 to a valve 7 secured in its upper end. The valve is formed with a screw threaded axially adjustable inner sleeve 8, Fig. 4 (not shown) which compresses a porous pad 22 within the valve. To open the valve a needle 10 is raised against the action of a spring, not shown, by a lever 13 engaged under a collar 14 provided on the needle. Clips 16, 17 integral with the lever engage a bearing face 5 of the casing and the lever is lifted by thrusting upwards clip 17 until its lower extremity engages a shoulder 18 of the bearing face. A head 25 rotatable with respect to the casing by means of a coupling sleeve 26, Fig. 2 (not shown), carries a flint wheel 28 and a flint tube 29 which projects into the annular space between casing 1 and peg 3 and passes through a disc 23 engaged on a nut 9 solid with sleeve 8. Rotation of the head alters the compression of the porous pad thereby varying the flame height.
Patent GB-1111250-A (GB)
Title: Sponge and cellular rubber compositions
IPC: C08F297/04
Filed: 1965-12-17
Abstract: A sponge or cellular rubber comprises a rubber matrix which is a block or random solution copolymer of a conjugated diene and one or more copolymerizable vinyl aromatic hydrocarbons, free of alpha substituents, as comonomer.  The comonomer suitably constitutes at least 40% of the copolymer.  Specified dienes are butadiene, isoprene and piperylene; specified vinyl compounds are styrene, 3-vinyl toluene, 1- or 2-vinyl naphthalene, and 4-methyl or 2-ethyl styrene; a copolymer of butadiene and styrene is exemplified.  Foaming is suitably accomplished by incorporating a chemical blowing agent (of which a list is given) into an unvulcanized composition as above, followed by heating and curing.  There may additionally be present up to 70% of a different conjugated diene/vinyl aromatic hydrocarbon copolymer; e.g. a butadiene/styrene copolymer containing 40-95% styrene.  In another embodiment up to 25% of natural rubber may be additionally present.  Fillers, plasticizers, colours or curatives are optional additives, particularly up to 15% of a short-fibre filler, e.g. cotton, rayon, or nylon flock, or 50-300% of a finely divided filler, e.g. silica, clay or carbon black, may be employed. The product is useful as shoe-soling, shock-pads, and carpet underlay.
Patent GB-1294332-A (GB)
Title: Induction motor drive particularly for a refrigerator compressor
IPC: H02K17/30
Filed: 1969-11-03
Abstract: 1294332 Automatic power regulation DANFOSS AS 3 Nov 1969 [20 Nov 1968] 53699/69 Heading G3X [Also in Division H2] When an asynchronous motor M operates at the lower limit of a voltage range, a triac T is fully conductive during both half-cycles so that the motor receives maximum current. If the voltage applied to supply terminals 1, 2, is increased, the temperature and resistance of a PTC element P rises to reduce the charging-rate of a capacitor C1. This reduces the average current through the triac T which has a diac D in its gating circuit. The power supplied to the motor is thus maintained substantially constant despite changes in the supply voltage, and overheating is prevented.