baber/WOPTO huggingface dataset:
Patent GB-1515916-A (GB)
Title: Ultraviolet light applicator
IPC: A61C7/00
Filed: 1975-08-11
Abstract: 1515916 Ultra-violet lamps for dental use CAVITRON CORP 11 Aug 1975 [16 May 1975] 33412/75 Heading F4R [Also in Division H2] An ultra-violet light applicator comprises a handle, a lamp cover extending from the handle, an ultra-violet lamp mounted in the cover, and an electrical circuit for starting and powering the lamp, the circuit including safety means for automatically shutting off power to the lamp in response to an open circuit failure of the lamp. The lamp comprises a lime glass envelope filled with argon and a trace of mercury and coated internally with strontium fluoroborate phosphor. The lamp and lamp cover may be curved to conform to the shape of a normal adult or child arch of teeth.
Patent GB-471665-A (GB)
Title: Improvements in and relating to hydraulic power transmission means
IPC: F16H41/26
Filed: 1935-12-03
Abstract: 471,665. Friction clutches; reversing- gearing. LAVAUD, D. S. DE. Dec. 3, 1935, No. 33523. Convention date, March 25. [Class 80 (ii)] [Also in Group XXIX] The invention relates to a hydraulic torque converter. The Specification as open to inspection under Sect. 91 comprises also (1) a clutch for connectng together the impeller and turbine shells automatically at a predetermined speed of one of them ; a ring carried by the inner part of the turbine blades has a flange 15a, Fig. 7 (Cancelled), and a ring carried by the inner part of the impeller blades has a similar flange 9a ; weights 91 arranged between the two flanges are held in contact with the flange 15a by springs 92 and are caused to rotate therewith by rollers 93 engaging notches 94 in the weights and inclines 95 in the flange; at a predetermined speed of the turbine the weights move out against the springs by centrifugal action, and friction surfaces 96 engage the outer flange 9a; since the impeller is rotating faster than the turbine, the weights are rotated forwardly relative to the flange 15a and the rollers and inclines then jam the weights against the outer flange. Alternatively the device may operate automatically at a predetermined speed of the impeller; (2) an electromagnetically-controlled epicyclic reversing gear, comprising a sun-wheel mounted on the end of the turbine shaft, a ring, gear integral with the drier shaft, and planet gears ; the carrier of the latter is freely rotatable and has resilient radial arms the outer ends of which carry a rim 67 of magnetic material, Fig. 4 (Cancelled) ; an electromagnet 54 is carried by the driven shaft, so that when energized a direct forward drive results, and an electromagnet 68 is carried by a stationary casing, so that when energized a geared reverse drive results. The opposed faces of the ring 67 and of the electromagnets 54, 68 are provided with corresponding notches 70 so as to give positive drive on engagement. This subject-matter does not appear in the Specification as accepted.
Patent GB-843076-A (GB)
Title: Needle thread tension device for sewing machines
IPC: D05B47/00
Filed: 1958-10-21
Abstract: 843,076. Sewing machines. SINGER MANUFACTURING CO. Oct. 21, 1958 [Oct. 25, 1957], No.33559/58. Class 112 In a sewing machine thread-tensioning device having a tensioning-spring cover limited to a turning movement on its supporting spindle of one revolution, the cover is adjustably secured to a tension-adjusting nut, threaded on said spindle, by means comprising a shoulder on the adjusting nut and a clamping nut threaded on the adjusting nut for clamping said cover against said shoulder. A spindle 5, fixed to the machine wall 1 by a set screw 6, has an enlarged portion 7 which lies in a recess 3 in wall 1 and is formed with spaced longitudinal grooves 8. Thread-tensioning discs 15, 16, 17, the inner one 16 being flat and the outer ones 15, 17 being dished, are biased against the portion 7 by a coil spring 20. The inner end of spring 20,. which has a finger 21 seated in a longitudinal slot 22 in spindle 5, abuts a cover 23 held slidably but non-rotatably on spindle 5 by a transverse bar 27 in slot 22. Interposed between cover 23 and disc 17 is a guard plate 18 having an arm 19 slidable in an aperture in wall 1. The outer end of spring 20 abuts an anchor disc 28 held slidably but non-rotatably on spindle 5 by a transverse bar 30 in slot 22. Disc 28 abuts a flange 38 on a tension-adjusting nut 37 threaded on the end of spindle 5. A cover 33, arranged to telescope within cover 23, is clamped adjustably against flange 38 by a clamping nut 40 threaded on to nut 37. A set screw 43 in nut 40 engages the inner end of a sleeve 42 disposed between nuts 37 and 40, to tilt the sleeve and thereby lock the nuts together. A radial finger 31 on disc 28 coacts with a radial lug 32 on cover 33 to limit the turning of the latter, with nut 37, to one revolution. A check spring has an end finger 9 anchored in one of the grooves 8 of portion 7 of the spindle 5, a coiled portion 10 encircling portion 7, and a laterally-extending thread-engaging U-shaped portion 11 terminating in a loop that is coiled about spindle 5. A tension-releasing rod 44, slidable in a longitudinal bore in spindle 5, engages bar 27 to force cover 23 away from the tensioning discs.
Patent GB-1239873-A (GB)
Title: Shaft seal
Inventor: HEINRICH RICHARD
IPC: F16J15/3244
Filed: 1969-07-03
Abstract: 1,239,873. Shaft seals. R. HEINRICH 3 July, 1969 [6 July, 1968], No. 33622/69 Heading F2B. The low pressure side of a lip seal, Fig. 1, or sliding face seal, Fig. 4, is provided with ribs or grooves 10, 11 which are inclined to a plane normal to the axis of the seal and arranged in pairs in V-formation, the ribs or grooves of each pair being symmetrically disposed with respect to a plane containing the axis of the seal. The arrangement provides an air flow towards the high pressure side of the seal to oppose leakage irrespective of the direction of rotation of the shaft. The seal may be made of synthetic rubber.
Patent GB-954192-A (GB)
Title: Improvements in or relating to electrical supply failure detectors
Inventor: LATHAM HERBERT
IPC: H03K3/282
Filed: 1959-10-05
Abstract: 954,192. Transistor circuits. A. V. ROE & CO. Ltd. Sept. 22, 1960 [Oct. 5, 1959], No. 33635/59. Heading H3T. [Also in Divisions G1 and H2] A failure detector for electrical supplies having n channels, comprises n - 1 transistors TR1 . . . TR3, the collector-emitter circuit of each transistor being connected to a channel via a rectifier RE1, RE4 or RE7, the base circuits being connected via rectifiers RE3, RE6, RE9, to adjacent channels, the collectors being interconnected by rectifiers RE2, RE5, RE8 and connected to an indicator, e.g. lamps L1, L2. In the event of failure of any one channel, a positive D.C. potential is applied to the associated point J, B, D or F and current flows through the appropriate rectifiers to a point C and thence through lamps L1, L2 and changeover contacts RA1 to earth, causing the lamps L1, L2 to give a steady indication. Under these conditions none of the transistors TR1 . . . TR3 has a supply to both its base and collector, but should two channels fail then one of the transistors has supplies to both its base and collector and the transistor conducts. The resulting potential across a resistor R4 is greater than the breakdown voltage of a Zener diode Z1 so that a further transistor TR4 becomes conductive and energizes the coil of a relay RA which changes over its contacts RA1, RA2. This connects the lamps L1, L2 to a multivibrator circuit including transistors TR5, TR6 which receive their supply over contacts RA2 from the point C. The lamps now flash at a predetermined rate to indicate the failure of two channels. Rectifiers RE12 and RE13 may be provided in the base circuits of the transistors TR5, TR6 to limit the reverse voltage when the transistors are cut off. The relay RA may have additional contacts to shed inessential loads or to bring emergency supplies into operation.
Patent GB-818065-A (GB)
Title: Improvements in or relating to semi-conductor devices
IPC: G01R33/07
Filed: 1955-11-24
Abstract: 818,065. Semi-conductor devices. SIEMENSSCHUCKERTWERKE A.G. Nov. 24, 1955 [Nov. 26, 1954], No. 33722/55. Class 37. A Hall effect device comprises a semi-conductor member with asymmetrical Hall electrodes such that a voltage appears between these electrodes when primary current is flowing but no magnetic field is applied, and means for applying a magnetic field of such magnitude that the Hall potential is reduced to zero or doubled, depending upon the direction of the field. The device may be utilized in switching, control or measuring circuits. Fig. 2 shows a semi-conductor body 1 having primary electrodes 2 and 3, and asymmetrical Hall electrodes 4 and 5 the output from which is applied to a measuring instrument 6. Fig. 3 shows an arrangement comprising three Hall electrodes the initial voltage between electrodes 14 and 15, and 16 and 14 being arranged to be zero and doubled respectively or vice versa according to whether the magnetic field is applied in one or the opposite direction. The magnetic field can thus be used to switch the output to either of electrodes 15 and 16. Other arrangements are described involving more than three Hall electrodes at least two of which are positioned asymmetrically, for switching or control purposes. The relative position of one or more of the electrodes may be made adjustable. The semi-conductor material may consist of Am Bv compounds such as In Sb or In As. Specifications 719,873, 763,348, 797,505 and 802,687 are referred to,
Patent GB-819067-A (GB)
Title: Improvements in or relating to printing plates
IPC: B41N1/10
Filed: 1955-11-25
Abstract: 819,067. Electroplating copper and chromium in succession. LEMOTAL S.A. Nov. 25, 1955 [Nov. 25, 1954], No. 33812/55. Class 41. [Also in Group XVI] A method of producing an offset planographic printing plate comprises the steps of electrolytically depositing a first copper coating 2 on a base-plate 1 from a cuprous solution, electrolytically depositing a further copper coating 3 over the first coating 2 from a cupric solution, electrolytically depositing over the coating 3 a thin film of chromium 4, interrupting the electrolysis, then resuming the electrolysis until a substantial chromium coating 5 has been deposited over the copper coating, and selectively removing portions of the chromium coatings in accordance with a pattern. In an example a base-plate 1 of zinc 114 cm. X 140 cm. was immersed in a bath containing 20 grams of cuprous cyanide, 15 grams of sodium cyanide, 15 grams of sodium hydroxide, 40 grams of sodium carbonate and 40 grams of Rochelle salt per litre of electrolyte, and a current of 500 amps. at 4 volts was passed for 30 minutes. The plate was then immersed in an electrolytic bath containing 250 grams of cupric sulphate per litre and a current of 300 amps. at 2.5 volts passed for 60 minutes. The plate was then buffed. The layer 4 was deposited from a bath containing 250 grams of chromic acid and 2 grams of sulphuric acid at 66 degrees Baume per litre at a temperature between 31 C. and 41‹ C. To deposit the layer 4 a current of about 3,500 amps. at 12 volts was passed for about 45 seconds after which electrolysis was suspended for about one minute. To deposit the layer 5 a current of about 3,000 amps. at 10 volts was passed for 10 minutes. After removal from the bath the plate was coated with a photographically sensitized layer 6 which was then exposed to light and developed by immersion in water to form a resist image which was then treated with a setting agent. The plate was then chemically etched to remove the chromium coatings from the parts of the plate not covered by the developed resist 6 which was finally completely removed.
Patent GB-1400112-A (GB)
Title: Aseptic packaging of materials
IPC: B65B9/04
Filed: 1973-07-17
Abstract: 1400112 Packaging under aseptic conditions TETRA PAK DEVELOPPEMENT SA 17 July 1973 [11 Aug 1972] 33889/73 Heading B8C In an apparatus for packaging sterile goods under aseptic conditions in containers thermoformed in a web 2 and closed by a further web 3, the web 2 and the combined webs 2 and 3 co-operate with a tunnel 1 to define a chamber 4 in which a sterile atmosphere is maintained and in which the container forming, filling and closing operations are performed. The atmosphere in the chamber 4 may constitute sterilized air or a sterilizing gas maintained at a pressure higher than that surrounding the apparatus. In one embodiment the longitudinal walls of the tunnel may include inturned flanges (43), Fig. 2b (not shown), positioned under the web 2 and the combined webs 2 and 3. In two further embodiments the longitudinal edges of the web 2 and the combined webs 2 and 3 run in liquid (45), Fig. 2c (not shown), or (49), Fig. 2d (not shown), contained in longitudinally extending channels (44, Fig. 2c) or (48, Fig. 2d). In one (Fig. 2c) of these two embodiments the channels (44) are mounted to the bottoms of the longitudinal walls of the tunnel and in the other embodiment down-turned flanges thermoformed along the longitudinal. edges of the web 2 and the bottom edges of the longitudinal walls of the tunnel both clip below the surface of the liquid in the channels (48). In a fourth embodiment, Fig. 2e (not shown), a liquid or air curtain is formed between the bottom edges of the longitudinal walls of the tunnel and the margins of the web 2 and combined webs 2 and 3. Within the sterile chamber 4 the containers may be thermoformed by vacuum drawing or by a forming tool 20 in forming boxes running on an endless chain underneath the web 2 or in a forming box 19 which may include several forming cavities and is reciprocable forwards and backwards in the longitudinal direction of the web 2. A filler 22 and a closure sealing device 23 are also provided in the chamber 4. The apparatus further includes pretreatment chambers 5 and 6 which have at their openings to the surrounding atmosphere and to the sterile chamber 4 arrangements which prevent ingress of the surrounding atmosphere into the pretreatment chambers 5, 6 and the atmosphere in these chambers 5, 6 from entering the sterile chamber 4. The webs 2 and 3 are cleaned and sterilized by passing them through vats 8 and 28 of washing and/or sterilizing liquid, excess of which is removed by an air jet device, and by absorption and heating elements 10, 31 and 16, 32, and by electron spraying and/or exposure to ultraviolet light within the pretreatment chambers 5 and 6. The individual packages 41 are separated by a knife element 38.
Patent GB-300919-A (GB)
Title: Process for the preparation of ammoniacal and potassium phosphates
IPC: C05B7/00
Filed: 1928-11-19
Abstract: 300,919. Soc. de Produits Chimiques des Terres Rares. Nov. 19, 1927, [Convention date]. Potassium ammonium phosphates which may contain varying quantities of potassium and ammonium and include a salt of the formula NH4.K.(H2PO4)2 are prepared by reacting phosphoric acid first with potassium chloride, and then with ammonia. For example, the requisite quantity of potassium chloride may be added gradually to phosphoric acid with progressive rise of temperature from say above 100‹ C. to 270‹ C.; after cooling to say 70-80‹ C. but while still liquid the product may be treated with ammonia under agitation, with addition of water, say 2 per cent, if necessary, and the double salt then crystallizes out.
Patent GB-857123-A (GB)
Title: Improvements in or relating to methods of treating silicon-iron alloys
IPC: C21D8/12
Filed: 1958-10-23
Abstract: A method of reducing the thickness of a silicon-iron alloy workpiece containing 2% to 5% silicon which is replaceable wholly or in part by aluminium and having a coarse grained cubic texture is characterized in that the workpiece is subjected to cold deformation in one or more stages, the thickness of the workpiece being reduced during a single-stage cold deformation or during each stage of a multi-stage cold deformation, by a proportion within the range of from 50% to 90%, and wherein the workpiece is thereafter subjected to a heat treatment at a temperature within the range of from 850 DEG C. to 1300 DEG C.  In between two consecutive cold deformation stages of a multi-stage cold deformation the workpiece is subjected to heat treatment within the range of 800 DEG C. to 1000 DEG C. and the thickness of the workpiece is reduced by a proportion within the range of 60% to 75% during the last cold deformation stage.  At least one heat treatment is effected in a vacuum or in an atmosphere of a non-oxidizing gas e.g. hydrogen or nitrogen or a mixture of hydrogen and nitrogen which results from the dissociation of ammonia.  In an example a silicon-alloy strip is partly melted in vacuo and hot rolled to a thickness of 2.7 mm.  The strip is cold rolled to 1.8 mm. in thickness and heat treated in a hydrogen atmosphere at 800 DEG C. The strip is then cold rolled to a thickness of 0.8 mm. heat treated as before and cold rolled again to a thickness of 0.35 mm.  The final heat treatment is carried out at 1200 DEG C. in an atmosphere of dry hydrogen. Specifications 807,809, 825,620, 825,692 and 825,903 are referred to.
Patent GB-324745-A (GB)
Title: Improvements in method of paper drying and apparatus therefor
IPC: D21F5/02
Filed: 1928-11-20
Abstract: 324,745. Gill, H. A., (Ross Engineering Corporation, J. 0.). Nov. 20, 1928. Drying.-In a 3-stage paper drying process, high pressure steam after traversing a heating apparatus used in the second stage passes into drying cylinders used in the third stage, and the superheated steam evolved from the moisture in the paper during the second stage is used for preliminary heating in the first stage. The paper, supported on canvas or felt strips 14, 15, passes over heated rollers 10 into the chamber 2 and is led by rollers 26 between pipes 23 containing the high pressure steam, which passes through pipes 36 into final drying cylinders 35. Superheated steam from the paper is withdrawn through tubes 40, 41 by a pump 17 and fed into the preliminary drying cylinders 10, where the paper is heated to 160‹ F. Water condensed in the preliminary drying is returned to the paper-making process.
Patent GB-1086680-A (GB)
Title: Lead titanate zirconate ferroelectric ceramic material
Inventor: AKASHI TSUNEO
IPC: C04B35/51
Filed: 1966-05-19
Abstract: A modified PZT ferroelectric ceramic material includes an amount not exceeding 7 wt. per cent of thorium dioxide and an amount not exceeding 0.7 wt. per cent of iridium dioxide, the modified PZT material having the formula PbnXm(TixZrySnz)O3 where X represents Ca and/or Sr and/or Ba, n is at least 0.75 with n + m = 1, x = 0.10 to 0.60, y = 0.00 to 0.90 and z = 0.00 to 0.65 with x + y + z = 1, and m and/or z is greater than zero. The modified PZT basic material together with the additives is mixed in a ball mill and presintered at 200 DEG  C. for one hour and then pulverized.  The powdered material is then pressed and sintered for one hour at 1300 DEG  C. Silver electrodes are applied to the pressed element which is polarized by application of 50 kv./cm. for one hour.
Patent GB-507422-A (GB)
Title: Improvements in or relating to hinges
IPC: A47K13/26
Filed: 1937-12-10
Abstract: 507,422. Hinges. FOX & SONS (FITTINGS), Ltd., H., FOX, J. E., and FOX, A. W. Dec. 10, 1937, No. 34206. [Class 65 (ii)] A closet seat is hinged on a base member 10 which is adjustable forwardly and backwardly, being retained on the attaching bolts 17 by slotted plates 15. The plates 15 are held in the base 10 by inwardly extending flanges 14, which allow adjustment in a direction parallel to the hinge axis. The base 10 has lugs 22 to which the seat is attached by pins 23 rotating in bushes 29 in the lug 28 of the seat 27. In an alternative construction the seat is provided with separate spaced lugs which rotate on outwardly extending pivot pins. A seat cover may be pivoted on extensions of the pins 23 or on a second pair of pins carried by the lugs 22. In a modification, Fig. 6, the hinge plates 32 on the cover carry pins 33 which extend through the lugs 22 of the base 10 into the sockets 29 of the seat 27. In a further modification, Fig. 8, the cover 35 and seat 34 are atttached to the base 10 by hinge plates 36, 38 pivoted to a divided lug 40. The invention is not limited to the use of a single base member 10 and separate base members for each fixing bolt may be provided.
Patent GB-788923-A (GB)
Title: Automatic immersion apparatus
IPC: G01N1/31
Filed: 1955-11-30
Abstract: 788,923. Preparing microscope specimens. 'TECHNICON INTERNATIONAL, Ltd. Nov. 30, 1955 [Dec. 9, 1954; Dec. 9, 1954], No. 34346//55. Class 97(1) [Also in Group XXX] In automatic immersion appartus used e.g. for the preparation of histologic tissue for microscopic examination and of the kind having a support for a number of receptacles for liquids and a conveyer which is rotatable and vertically movable for transferring a tissue holder from one to another of the receptacles, the receptacles 32 have a front wall 34, a rear wall 36 and converging side walls 38. They are arranged in a ring with the side walls 38 of a receptacle in contact with the side walls of adjacent receptacles. The rear walls 36 abut against a cylinder 14 in which the driving mechanism is disposed. Horizontal movement of the receptacles is prevented by spring fingers which engage the lower part of each wall 34. Vertical movement is prevented by forming a narrow groove 42 in each side wall 38 and complementary engaging members 46 on the part 14. Inset parts 58 of the walls 38 allow the receptacles to be gripped by an operator's fingers for removal. The receptacles are made preferably of nylon, polytetrafluorethylene or polytrifluorochlorethylene. Specifications 780,793 and 788,922 are referred to.
Patent GB-325579-A (GB)
Title: Improvements in and relating to exhaust silencers for internal combustion engines
IPC: F01N1/18
Filed: 1928-11-22
Abstract: 325,579. Lachapelle, M. Nov. 22, 1928. Exhaust silencers.-The silencer comprises a casing 2 enclosing a number of blades 3 mounted on a shaft 3<k> and adapted, in one form, to be rotated by the exhaust gases entering at 2k and leaving by way of a narrow slit 3
 of which is an extension or deflector plate 3<t>. The blades, which may be curved or flat, comprise a short rectangular portion 3b, Fig. 2, near the shaft, and a larger trapezoidal portion 3<a>, the outer edge 3<g> of which is loaded, e.g. by a rod of lead. In a modification, the vanes are driven through a freewheel device from the fly-wheel or other rotating part of the engine. The casing may be covered by sound-deadening material such as lead, felt, &c. A draining aperture is provided at 3<v> and may be used to introduce a cleaning fluid.
Patent GB-901680-A (GB)
Title: Preparation of alkyl chloride
IPC: B23K35/02
Filed: 1960-10-07
Abstract: 901,680. Gas-phase reactors. COLUMBIASOUTHERN CHEMICAL CORPORATION. Oct. 7, 1960 [Oct. 9, 1959], No. 34374/60. Class 1(1) [Also in Group IV(b)] An apparatus for reacting propylene and chlorine to give allyl chloride comprises a tubular reactor 1 in a zone A of which are mixed gaseous propylene and chlorine using jets; the mixture is impelled downwardly past throatsBofeductor nozzles, thereby drawing in hot gases from zone C and mixing instantaneously with these; the thus heated and diluted gases pass down through cylindrical zone D, where chlorination occurs, into zone E, a portion being recycled through throats B, and the rest being withdrawn at 2. In a modification, an inert gas stream may be fed past throats B and the reactants fed elsewhere in the cycle.