baber/WOPTO huggingface dataset:
Patent GB-1006760-A (GB)
Title: Method and apparatus for forming glass wafers or discs
Inventor: JENKINS WESTON H
IPC: C03B19/00
Filed: 1964-03-18
Abstract: <PICT:1006760/C1/1> <PICT:1006760/C1/2> In a method of forming wafers or discs from a molten glass making material having a liquidus temperature in the range 1250-1400 DEG  C., the molten material is dripped from the orifice of a tube maintained at a temperature between 1300 DEG  and 1400 DEG  C., single drips of the molten material being caught and simultaneously pressed and cooled to a temperature of from 750-900 DEG  C. within a time period of from 2 to 6 seconds subsequent to the moment the caught drip leaves the tube. A glass is melted in a crucible 1 having a tube 3 extending from its base which terminates in an orifice 10. Electric heating means 8, 9 and 11 maintain the crucible, tube and orifice at the required temperature. A drip 7 is caught in a mould 6 mounted on rod 20 of a piston 25 in a cylinder 23.  A spring 27 keeps the piston in a normally retracted position. The cylinder 23 is mounted at one end of a rod 15 of a piston-cylinder 14, 13, and also at one end of a guide rod 19. When the drip has been caught in the mould 6, the assembly is moved to a second position by the retraction of piston 14 in cylinder 13, at the end of which stroke rod 19 contacts switch 21. This causes air to be admitted to cylinder 23 to raise mould 6 into pressing engagement with a heated plunger 24.  After a suitable time, mould 6 is lowered out of contact with the plunger and an ejecting mechanism 29 (Fig. 2) is activated to brush the pressed wafer or disc off the mould, which is then returned to its starting position. The catching and forming operation is activated by the drip 7 passing through a beam 52 of a photo-responsive device 47 which starts the cycle of operations by means of a control circuit described with reference to Fig. 3 (not shown). A preferred glass composition consists essentially by weight of 5-15% SiO2, 5-15% Al2O3, the ratio SiO2 : Al2O3 being equal to 3 : 1/3 , and 70 to 90% BaO + TiO2, the ratio BaO : TiO2 being equal to 0.90 : 1.2 on a molar basis for production of glass-ceramic, barrier-layer capacitors.  Specification 1,003,893 is referred to.
Patent GB-580207-A (GB)
Title: Improvements in apparatus for effecting circuit control in accordance with the speedof a rotating part
IPC: H02P29/00
Filed: 1944-06-16
Abstract: 580,207. Actuation of switches. IGRANIC ELECTRIC CO., Ltd., and WRIGHT, S. R. June 16, 1944, No. 11520. [Class 38 (v)] A rotary shaft S carries an eddy-current member 5 having a cylindrical portion traversed radially by a magnetic field proceeding between poles 8 of a plurality of magnets and a cylindrical magnetic member 9 fixed to a shaft 6. Thus rotation of shaft S in either direction tends to rotate shaft 6 in the same direction and at a suitable speed a pin 10 fixed to the member 9 moves one of two spring-pressed contacts 1 into engagement with a corresponding fixed contact. In the form shown there are eight magnets 8 with their outer poles alternately arranged.
Patent GB-910489-A (GB)
Title: Liquefaction of nitrogen in regasificaton of liquid methane
IPC: F25J1/02
Filed: 1961-03-29
Abstract: 910,489. Liquefaction and revaporization of gases. CONCH INTERNATIONAL METHANE Ltd. March 29, 1961 [June 16, 1960], No. 11540/61. Class 8(2). Liquefaction of gaseous nitrogen entering the system at atmospheric pressure, through a line 14, Fig. 1, is effected by cooling in a heat exchanger 7 traversed by pressurized liquid methane issuing from a pump 4 and which is thereby vaporized, compressing the so-cooled nitrogen gas at 15 and condensing it in an exchanger 13 cooled by feed liquid methane at atmospheric pressure; the resulting compressed methane gas leaving exchanger 7 being warmed in an exchanger 9 and expanded in a turbine 10 which provides a source of power to drive the pump 4 and compressor 15. As shown the nitrogen issuing from compressor 15 is further compressed at 18 before passing to the condenser 13, the heat of compression being removed by liquid methane exchangers 5, 6. Also turbine 10 discharges through an exchanger 11 traversed by waste hot water before final expansion in a turbine 12. The nitrogen to be liquefied may be derived from the head of an air rectification column 42, Fig. 2, operating at below atmospheric pressure. Effluent nitrogen in a line 43 is warmed in exchangers 44, 41, compressed at 45, cooled in an exchanger 26 traversed by pressurized liquid methane forced by a pump 22 through a line 24, compressed at 46 and after traversing heat exchanger 26 a second time is liquefied in a condenser 37 traversed by liquid methane at atmospheric pressure entering the system in a line 20. The so-vaporized methane is discharged from the system by a compressor 38, and the high pressure methane gas issuing from exchanger 26 is further warmed in an exchanger 27 traversed by propane in a closed cycle comprising a pump 34, heater 35 and turbine 36 before being further warmed in hot water heaters 29, 31 and expanded in turbines 30, 32. A portion of liquid nitrogen leaving condenser 37 is fed to the column 42 as reflux through a line 47, exchangers 41, 44 and a line 48 whilst the remainder is flashed into a chamber 50. Liquid nitrogen from the base of chamber 50 is flashed into a chamber 53 whilst nitrogen gas passes from chamber 50 through a line 51 and a condenser-reboiler 59 in the column 42 and the so-condensed nitrogen traverses a line 60 leading to the flash chamber 53 from the base of which product liquid nitrogen is discharged through a line 55. Air to be rectified in column 42 is forced by a compressor 40 through an exchanger 25 traversed by counterflowing mixture of liquid and gaseous methane and by product oxygen gas in a line 58 and through exchanger 41 traversed by counterflowing effluent nitrogen and product oxygen and traversed by a co-current flow of reflux liquid nitrogen. Liquid oxygen product is withdrawn from the base of column 42 through a valve 57. In a modification the whole of the oxygen product is withdrawn in the liquid phase.
Patent GB-750504-A (GB)
Title: Improvements in or relating to surface polishing devices
IPC: A47L13/314
Filed: 1955-10-10
Abstract: 750,504. Reservoir pads and brushes. KING J. Oct. 10, 1955, No. 11542/53. Class 19 A polishing device comprises a body member supporting a polish applicator adapted to be supplied with polish from a container within the body and a rubbing element associated with a heater. The polishing device shown comprises a body member 12 having on one face a unit comprising a sponge pad 16 or a brush, in communication with a polish reservoir 23 and on the opposite face a felt rubbing element 6 backed by a electric heating element 14 which also provides a small amount of heat from its rear surface for its polish reservoir. The body member is rotatably mounted on a forked handle. Means may be provided for interrupting the supply of.polish for the reservoir and additional cleaning devices such as mops, brooms or dusters may be provided on other faces of the body member.
Patent GB-601309-A (GB)
Title: Improvements relating to liquid projection apparatus
IPC: A62C31/00
Filed: 1944-06-19
Abstract: 601,309. Fire-extinguishing ; flame-throwers. FRASER, R. P. June 19, 1944, No. 11653. [Classes 47 (ii) and 119] [Also in Group XI] In apparatus of the kind described in Speciflcations 583,025, 583,029 and 601,307 for projecting fire-extinguishing or combustible media in which the nozzle is controlled by an axially movable valve, means is provided beyond the nozzle to control the direction of projection. In one form, a tubular radial arm 19 is provided on a cylindrical member 20 rotatable on the valve casing 21 connected to a supply pipe 22, the valve 23 being opened by the main fluid pressure against springs 24 and fluid pressure from a pipe 25. In another form, the nozzle is provided with a rotatable extension the outer end of which is bent through a right angle. In a further form, the extension is flexible and is held in adjusted position by a link pivoted to its end and to a block slidable on a rod. A core of inflammable liquid may be supplied to the main jet through tubes 27, 28 and 29 and may be ignited by a spark gap.
Patent GB-117634-A (GB)
Title: Improvement in Artificial Fuel and Methods of making Same.
IPC: C10L7/04
Filed: 1918-07-17
Abstract: 117,634. American Linseed Co., (Assignees of Schaub, J.). July 17, 1917, [Convention date]. Drawings to Specification. Solidified and gelatinized spirits.-A fuel is made by dissolving, in methyl alcohol, cellulose pentanitrate or other cellulose having a nitrogen content which renders it soluble in methyl alcohol, and then solidifying the solution by adding ethyl alcohol or water. In making the fuel, which is of the kind described in Specification 127,585, 4 parts of the cellulose compound, 46 parts of commercial methyl alcohol, and about 12 parts of connnercial ethyl alcohol may be used; by adding more ethyl alcohol, the fuel may be transformed into a solid jelly which may be cut into cubes. The jelly is formed with tubular passages of small cross-section, which can be filled with ethyl alcohol by capillary action .and, after the jelly has been cut into cubes, the exposed ends of the passages are sealed. These passages are formed by means of the apparatus described in Specification 117,635.
Patent GB-559431-A (GB)
Title: Improvements in and relating to coupling means for connecting conveyor or like screws
IPC: B65G33/32
Filed: 1942-08-21
Abstract: 559,431. Screw conveyers. McKEAN, J. G. Aug. 21, 1942, No. 11787. [Class 78 (i)] Coupling means for connecting in axial alignment two conveyer or like screws each including a shaft or tube 1 or 2 provided with a spiral blade 3 or 4, comprises a socket joint between the shafts, one screw being driven from the other only through the spiral blades. As shown, the coupling means comprises a tube 5 also having a spiral blade 6 which is continued beyond the ends of the tube 5 to an extent equal to that by which the blades 3, 4 terminate short of steps 7 formed by reducing the ends 8 of the shafts 1, 2, for insertion in the coupling tube 5, so that when the parts are assembled the end faces 10 of the blade 6 abut the end faces 9 of the blades 3, 4, and the driving force is transmitted only through the blades. The coupling tube and blade may be welded or otherwise secured to or formed integral with the shaft and blade respectively of one of the screws to be coupled. Specification 5544/95, [Class 78], is referred to.
Patent GB-789127-A (GB)
Title: Improvements relating to coal or ore washing plant
Inventor: SYMINGTON ROBERT
IPC: B03B5/44
Filed: 1955-04-25
Abstract: 789,127. Sink and float separation. SIMON-CARVES, Ltd. Feb. 13, 1956 [April 25, 1955], No. 11837/55. Class 82(2) A sink and float coal or ore washing plant comprises a spraying a dewatering scrreen combined with a dilute medium screen in the form of a double deck screen, such a double deck screen being provided for each product of separation or a single partitioned double deck screen being provided for two such products. As shown the floats and sinks are transformed to separate double deck screens 5, 6 and 18, 19 respectively, the apertures of the bottom decks 6, 19 being finer than those of the top decks 5, 18 so as to retain fine coal, fine shale and slimes. The material leaving the lower deck 6 may be discarded or mixed with the floats, whilst that leaving the lower deck 19 is generally discarded. In modifications, (i) the drainage section of the screens above the correct medium vessels 3, 15 may be omitted and the products drained previously, (ii) the lower decks 6, 19 may extend only over the dilute medium vessels 4, 16, and (iii) the mesh of those sections of the lower decks 6, 19 above the vessels 3, 15 may differ from that of the sections above the vessels 4, 16.
Patent GB-1168678-A (GB)
Title: Improvements in or relating to the Determination of the Direction of Magnetic Fields.
Inventor: FELLGETT PETER BERNERS
IPC: G01R33/028
Filed: 1967-03-14
Abstract: 1,168,678. Determining direction of magnetic field. P.B. FELLGETT. March 11, 1968 [March 14, 1967], No. 11840/67. Heading G1N. Apparatus for determining the direction of a magnetic field comprises a slotted cylindrical conductive member 1, Fig. 1 rotated about its longitudinal axis by air thrust at air bearings 3, 4, whereby the member acts as a single turn coil and an induced current flows round the slot to produce an alternating magnetic field which is sensed by surrounding quadrant coils 5a-5d, to produce AC voltage signals which are used to line up the rotation axis with the field direction. The slot 2 is preferably perpendicular to the axis of the rotor 1. The angular position of the rotation axis when the signals in coils 5a-5d have been eliminated, i.e. when it coincides with the direction of the magnetic field, is measured by known means relative to the vertical and North. The rotating member may have a high permeability core surrounded by a coil whose induced c.m.f. is indicative of the angle between the magnetic field and the axis of rotation. The rotating member may alternatively carry an electromagnet or permanent magnet, with a total-field magnetometer on the rotational axis, which senses when the axial total field strength is constant during rotation, indicating coincidence between the axis of rotation and the direction of the external magnetic field.
Patent GB-489485-A (GB)
Title: Improvements relating to fire-extinguishing apparatus
IPC: A62C13/70
Filed: 1938-04-20
Abstract: 489,485. Fire-extinguishers. PYRENE CO., Ltd. April 20, 1938, No. 11887. Convention date, April 20, 1937. [Class 47 (ii)] In an extinguisher of the gas-capsule type, the rod 18 of the piercer 25 is sealed, where it passes through the head 17, by a bellows 34 which is secured at its lower end to a flange 20 on the rod and at its upper end to a shoulder 36 on the head. The rod is held outwardly by a spring 41 arranged within a sleeve 37, and has a knob 44 guided by a nut 40. A pressure-relieving device 46 is shielded by a perforated screen 48, and the capsule 26 screws into a ring 30 depending from the head 17.
Patent GB-527805-A (GB)
Title: A process for the polymerisation of unsaturated hydrocarbons
IPC: C07C2/08
Filed: 1939-04-20
Abstract: 527,805. Polymerization of olefines. NAAMLOOZE VENNTOOTSCHAP DE BATAAFSCHE PETROLEUM MAATSCHAPPIJ. April 20, 1939, No. 11952. Convention date, May 16, 1938. [Class 2 (iii)] In the catalytic polymerization of olefines, particularly those containing 3 to 5 carbon atoms in the molecule, the diminution in activity of the catalyst due to the poisoning effect of aldehydes, amines and sulphur present in the starting materials is substantially avoided by washing the olefines with water prior to contacting them with the catalyst. The catalysts comprise those known to polymerize olefines, of which a phosphoric acid, phosphorus pentoxide, sulphuric acid, aluminium chloride, zinc chloride and iron chloride are referred to. The use of a catalyst prepared by mixing a phosphoric acid with a siliceous substance such as kieselguhr and calcining at 180-300‹ C. is specifically mentioned and the treatment of the distillate vapours of a California mineral oil, which include propane-propylene, butanebutylene and pentane-amylene fractions, is described. Preferably the washing is effected with water in an amount of <SP>1</SP>/ 3  to 10 times the weight of hydrocarbons and at a temperature of 15-30 ‹C.
Patent GB-449281-A (GB)
Title: Improvements in or connected with rangefinders, heightfinders, and like optical instruments for the measurement of angles
IPC: G01C3/14
Filed: 1935-04-18
Abstract: 449,281. Rangefinders &c. BARR & STROUD, Ltd., and STRANG, J. M., Caxton Street, Anniesland, Glasgow. April 18, 1935, No. 11970. [Class 97 (i)] Means for testing the adjustment of a single observer rangefinder &c. comprises, within the casing of the instrument, optical members for receiving light directed transversely from one side of the optical system of the rangefinder from, or as from, an object situated laterally on the prolongation of the base of triangulation, and for causing the light to produce in the field of view of each of the telescope elements of the rangefinder an image of the object which thus appears at a definite and constant range, which may be infinity. In Fig. 1, light from an external natural object enters the casing A by a window 5 and is directed by optical squares C to the reflecting prisms 3 of the instrument. The apparent range of the object can be varied by displacing a prism D. Instead of viewing an external object, a collimator may be used to project light to the squares C ; the collimator may be placed in the window 5 or in other positions in association with suitable reflectors. In Fig. 5, a collimator E2 is arranged within the casing and a reflecting prism F1 directs the light to the squares C. The collimator is mounted in a ring 6 so as to be adjustable about two axes at right-angles to each other by screws 8, 12.
Patent GB-911455-A (GB)
Title: Improvements in and relating to endless slatted elevators
IPC: B65G17/42
Filed: 1960-04-05
Abstract: 911,455. Endless conveyers. TEAGLE, W. T. July 3, 1961 [April 5, 1960], No. 12000/60. Class 78 (1). An auxiliary device 8 is secured to each of the slats 3 of an endless convyer by means of a bolt 1. The device 8 is formed with a slot 15 which engages under the head 6 of the bolt 1 and a spring 5 maintains a clamping action.
Patent GB-1205050-A (GB)
Title: Process for preparing bicyclopentadecenones
IPC: C07C35/23
Filed: 1967-12-08
Abstract: 1,205,050. Preparation of bicyclopentadecenones. R. FIRMENICH, G. FIRMENICH, R. E. FIRMENICH, and F. H. FIRMENICH, [trading as FIRMENICH & CIE.]. 8 Dec., 1967[8Dec., 1966], No. 12013/70. Divided out of 1,205,047. Heading C2C. [Also in Division C5] Bicyclopentadecenones of formula are prepared by dehydrating a lactone of formula wherein R is H or CH 3 ; the compound wherein R=CH 3  being claimed per se and also be obtainable by methylation of the compound wherein R = H. In examples: (1) cyclododecanone is reacted with diethyl carbonate in the presence of sodium methoxide to give 2-ethoxycarbonyl-cyclododecanone which is condensed with methyl acrylate to yield a compound of formula which is treated first by refluxing in aq. NaOH, then by reacting successively with sodium borohydride and H 2 SO 4  to yield a lactone as above wherein R = H, which is dehydrated with polyphosphoric acid; (2) as in (1), but using methylmethacrylate in the second stage the compounds wherein R = CH 3  are obtained; (3) the product of (1) was treated with a mixture of diethylcarbonate and sodium methoxide, the excess of methanol and ester distilled off and the residue treated with methyl iodide to yield the 14- methyl derivative; (4) the product of (1) is catalytically hydrogenated to yield bicyclo[10.3.0]- pentadecan-13-ol.
Patent GB-927039-A (GB)
Title: Apparatus for use in teaching
IPC: G09B3/06
Filed: 1961-04-05
Abstract: 927,039. Educational appliances. E. G. FALLINGBORG, and W. J. ANDERSEN. April 5, 1961, No. 12162/61. Class 146 (2). Apparatus for use in teaching comprises two bases 5, 6 and a number of tablets 4, each of the tablets being intended to be placed on the base 5 in a position corresponding to a correct solution of a problem, and each tablet 4 having a hole 7 therein, the base 6 having markings 8 thereon such that, when placed on the base 6, a set of tablets which previously has been correctly assembled on the base 5, will show similar markings 8 e.g. markings 8 of the same colour, through the holes 7. A shallow box 1 is provided for holding the bases 5, 6 (half of each of which is shown in Fig. 1), and a set of tablets 4. To place the sheet 6 in position, the assembled set of tablets may be moved into the box lid 2 and the base 6 placed in the position of the base 5, the lid then being lowered to place the tablets on the base 6. Alternatively, the base 6 may be placed in the lid 2 and the tablets turned over into the lid. As described, each tablet may have a word thereon, and a pupil has to place the tablets on differently coloured areas on the base 5 according to whether the words are nouns, verbs &c.
Patent GB-550600-A (GB)
Title: Improvements in hitches for trailers
IPC: B60D1/26
Filed: 1941-09-20
Abstract: 550,600. Vehicle couplings. WALLACE & SONS Ltd., J. (Farm Equipment Co. O.). Sept. 20, 1941, No. 12204. [Class 103 (v)] The draft bar 12 of a trailer 10 is supported prior to attachment to the tractor by a member 15, pivoted on a pin 17 in the member 12 and controlled by an intermediate draft member 30, having at its forward end a pin 37 lifted upwardly by the tractor driver to engage with the tractor draft bar, a cord 43 also being pulled to release a locking bar 20 for the support 15. Movement of the tractor carrying forward the intermediate draft member 30 brings a pin 40 of the member 30 into engagement with recesses 41 of the draft bar 12, the movement also swinging the support 15 backwards about its pivot 17 into its inoperative position where it is held by locking lever 20.
Patent GB-1057191-A (GB)
Title: Method and apparatus for drilling small holes
IPC: B23K26/38
Filed: 1964-03-23
Abstract: 1,057,191. Removing metal by lasers. GENERAL ELECTRIC CO. March 23, 1964 [April 1, 1963], No. 12219/64. Heading B3V. [Also in Divisions B4 and G2] Apparatus for drilling small holes in material 21, Fig. 1, such as tungsten, molybdenum or platinum by focusing thereon a pulsed laser beam comprises a housing 1 having a reflective inner surface and an aperture 3 and containing a laser rod 4 and a flash lamp 5, a limiting aperture 22 and a reflecting objective lens 18, the material 21 being held in an adjustable member 24 for positioning the material at a selected distance from the focal point of the objective lens 18 and the lamp 5 being connected to a capacitor D.C. power supply circuit 7 and having wound thereon a wire 12 connected to an energizing circuit 13. A totally reflective prism, e.g. a Porro prism may be coupled to the end of the rod 4 to obtain a better collimated beam of light. The prism may be positioned externally of the housing 1 or be ground on the end 6 of the rod 4 and oriented correctly relative to the crystallographic C-axis. Circuit 7 comprises a D.C. power supply 8, Fig. 2, a resistor 9, capacitors 10 and inductances 11. Circuit 13, Fig. 2, comprises a battery 14, push-button switch 15 and step-up transformer 16. Objective lens 18 comprises convex mirror 19 and a concentric concave mirror 20. Aperture 22 is formed by an apertured white paper sheet. Objective lens 26 of microscope 25 is focused on material 21 to determine the focal point of objective lens 18. The microscope may also be used to obtain a precise transverse adjustment of material 21 relative to the axis of the laser beam. An auto-collimator 27 incorporating a partially reflective mirror 30 is employed to align the axis of objective lens 18 with the axis of the laser beam. Opaque and transparent shields 31, 32 are provided to protect the objective lenses 26 and 18 respectively. A diverging lens 33 is provided to prevent the centre of the laser beam from impinging on the centre of the reflecting surface of the mirror 19. Objective lens 18 and aperture 22 are mounted on an adjustable microscope body 23. As shown, the reflective inner surface of the housing 1 is ellipsoidal with the rod 4 and lamp 5 disposed at the respective foci thereof; alternatively, the reflective inner surface of the housing may be cylindrical with helical flash lamps 5 surrounding the rod 4.