baber/WOPTO huggingface dataset:
Patent GB-442360-A (GB)
Title: Improvements in or relating to the production of sulphates of barium and calcium
IPC: C01F11/46
Filed: 1935-09-23
Abstract: Crude barium or calcium sulphate is purified by melting it with a solvent alkali or alkaline-earth metal salt and a flux in the presence of a reducing agent, and maintaining the molten mass at temperatures which result in the formation of a free-flowing low-melting slag containing the impurities of the crude sulphate and having a specific gravity higher than the sulphate melt, and subsequently separating the sulphate melt from the slag.  Sodium or calcium chloride or sodium sulphate may be used as the solvent salt, and the flux preferably comprises an iron compound such as roasted iron pyrites, with or without calcium fluoride or an acid flux such as silica or alumina or a basic flux such as lime, soda, or baryta. The furnace flame may be used as the reducing agent, but preferably a petroleum coke, coke breeze, or anthracite slack is added to the charge so that an oxidizing flame may be used. The melt may be maintained at a temperature between 1000 and 1200 DEG  C., and the purified sulphate melt be tapped into a quenching medium such as water.  The melting operation may be carried out continuously or discontinuously in a rotary furnace, in which case a layer of slag adheres to the furnace wall, and in passing under the charge assists the removal of impurities.  In this case the slag may be "frozen out" prior to tapping the sulphate melt in order to secure complete separation of impurities.  In an example using equal quantities of crude barium sulphate and sodium chloride \ba1/2\be per cent of petroleum coke and 3\ba1/3\be per cent of pyrites cinder based on the weight of the barium sulphate is added to the charge.
Patent GB-172432-A (GB)
Title: Improvements in headlights
IPC: F21V11/16
Filed: 1920-09-16
Abstract: 172,432. Fink, C. E. Sept. 16, 1920. Vehicle lamps.-A vehicle head-light comprises a casing A which extends forwardly in the form of a visor or hood 2, the edge of which is in line with the centre of a lamp bulb C. A shield 4 is secured in front of the bulb C and a reflector B extends from this shield round the bulb C, where it is of parabolic form and is continued to form a reflective lining for the visor 2. A glass front 5 is held in position by a flange 7 and fits a groove 6 in the reflector B. To support the lamp on the lamp brackets, plates 9 are pivoted at 10 to the casing A and have slots 11 in which are adjustably secured bolts 12 threaded in the casing, so that the angular position of the lamp may be varied. Sleeves on the plates engage the lamp brackets and are secured in position by bolts.
Patent GB-186257-A (GB)
Title: Improvements in shaving brushes
IPC: A46B15/00
Filed: 1921-10-08
Abstract: 186,257. Hawtin, C. W., and Mason, W. G. Oct. 8, 1921. Hollow handles.- In a shaving brush the bristles 1 are held within the socket 2 by one or more openended tubes 3, and the hollow handle is perforated as at 4, so that circulation of air to the centre of the bristles is obtained.
Patent GB-635638-A (GB)
Title: Improvements in or relating to electro-magnetic switches
IPC: H01H50/20
Filed: 1947-10-02
Abstract: 635,638. Electromagnetic switches. TRICO PRODUCTS CORPORATION. Oct. 2, 1947, No. 26607. Convention date, Oct. 30, 1946. [Class 38 (v)] An electromagnetic switch specially adapted for closing simultaneously a number of windowoperating circuits of a motor vehicle comprises an armature 35 fixed to a star-shaped or multiarmed resilient member 41, some of the arms of which are bent downwardly as at 43 and are secured to posts 51 so as to hold the armature spaced from the magnet. The remaining arms, 44, serve as contacts and are brought into engagement with fixed contact posts 62, arranged round the magnet, when the latter is energized. The armature slides on a screw 36 carried by the core of the pot-shaped magnet.
Patent GB-821388-A (GB)
Title: Method of preparing alkali metal hypophosphites
IPC: C01B25/16
Filed: 1957-08-23
Abstract: Alkali-metal hypophosphites are prepared by the reaction of phosphorus with an alkali-metal hydroxide and water, in the presence of at least one saturated aliphatic alcohol, which acts as a catalyst.  Isoamyl alcohol and a mixture of ethyl and isoamyl alcohols are specified.  They may be recovered and recycled after the reaction is completed by distillation.  Preferably, between 1 and 15 parts by volume of alcohol is employed for 100 parts by volume of phosphorus, alkali-metal hydroxide and water combined. In an example an emulsion of phosphorus in sodium hydroxide is prepared, as in Specification 803,179, and is maintained at 50 DEG  C. in the presence of ethyl and amyl alcohol.  Some milk of lime is added to precipitate any phosphite formed.  When the reaction is complete the mixture is raised to 85 DEG  C. to decompose phosphine polymers.  The process may be operated in a continuous fashion.
Patent GB-641181-A (GB)
Title: Ornamenting machines
IPC: C14B1/56
Filed: 1947-10-03
Abstract: 641,181. Punching-machines. FREEMAN CO., L. G. Oct. 3, 1947, No. 26715. Convention date, Oct. 21, 1946. [Class 31 (ii)] [Also in Group XVI] In a machine for ornamenting boot and shoe parts by combined perforating and marking operations as described in Specification 527,069, in which a carriage 3 for the operating punches or dies is moved into and out of operative position under control of an electromagnetic clutch, and the work support 2 is raised tc operative position by toggle mechanism actuated by a shaft driven by a pulley 6 through a one-revolution clutch, the circuit for energizing the electromagnetic clutch is arranged in series with a switch 49, which is normally kept open by a spring and is adapted to be closed by an abutment plate 50 mounted on the bottom of the support 2, so that the electromagnetic clutch can only be energized to move the carriage 3 when the support 2 is in its lowered position. The switch 49 can be controlled by the mechanism which operates the support 2.
Patent GB-958534-A (GB)
Title: Improvements in focal-plane photographic shutters
IPC: G03B9/40
Filed: 1961-07-24
Abstract: 958, 534. Focal-plant photographic shutters. LA SPIROTECHNIQUE. July 24, 1961 [July 25, 1960; June 27, 1961 ], No. 26732/61. Heading G2A. A focal-plane shutter comprising two rigid slidable blades movable in the same direction during the exposure stroke have fractional damping means associated with the shutter blade driving and guiding means, said damping means being operative during the exposure stroke to prevent a shutter blade rebounding at the end of said stroke. In the shutter shown in Fig. 2, shutter blades 4, 5 are slidable on rods 10, 10a by means of guide straps 8, 9. Blade 4 is driven by a spring 30 which is tensioned by a cocking lever 17. During its upward movement a bushing 26 on strap 8 engages the shoulder 28 of a tube 22 which is frictionally slidable on rod 10. This frictional movement tensions are supplementary spring 32, which assists in cocking the shutter, and slows down the blade 4 to prevent it bouncing back at the end of its movement. Blade 5 is operated similarily. In Fig. 2 the friction is provide by rod 22 sliding over part of rod 10 which has a slot 24 in which a tool may be inserted to increase the rod thickness. In Fig. 4 the frictional force is provided by a elastic ring 60 which is frictionally slidable in the rod 10 and is engaged by bushing 26 during the exposure stroke. In other embodiments the rods 10, 10a are mounted on the same side of the blades and blade 4 is provided with a light sealing strip which has a groove in which blade 5 engages.
Patent GB-535096-A (GB)
Title: Improvements relating to springs of the kind comprising rubber parts which are interposed between metal or other rigid parts and are subjected principally to shear-flexion stresses
IPC: E02B3/26
Filed: 1939-09-27
Abstract: 535,096. Indiarubber and like springs. SOC. ITALIANA PIRELLI. Sept. 27, 1939, No. 26746. Convention date, Oct. 13, 1938. [Class 108 (iii)] A spring, in which a rubber intermediary is subjected to shear stresses by the relative motion of metal or rigid parts bonded thereto, has transverse rubber sections 1, 2, Fig. 1, mounted between metal cylinders 7, 8. The sections 1, 2 are spaced apart by an annular member 9, and do not contact at their maximum deformation. In an alternative construction, Fig. 3, the rubber elements 16, 17, 18, 19 are arranged in series formation between metal rings 20 and 21, 21 and 22, 22 and 23, and 23 and 24, respectively. The deformation of the spring due to a force applied between the cylinders 20, 24 is the sum of the deformations of the individual rubber elements. Buffering rings are provided between the cylinders 20, 22 and 24, 22, and comprise metal rings 26, 27 with intervening rubber rings 28.
Patent GB-1404622-A (GB)
Title: Phosphate glass
IPC: C03C4/20
Filed: 1972-06-08
Abstract: 1404622 Phosphate glass IMPERIAL CHEMICAL INDUSTRIES Ltd 24 May 1973 [8 June 1972] 26807/72 Heading C1M Inorganic oxide glasses comprise, in mole per cent the above constituents totalling at least 99 mole per cent of the glass, excluding water, which may be present in amounts up to 5% by weight of the total. The alkaline earth metal oxide, if present, is preferably MgO and/or BaO. The glass product preferably has a transformation temperature of less than 300 C. (e.g. 140-280 C.) and a rate of solution in water less than 1À3%/ min. at 100 C. The glass may be prepared by fusing the oxides or their precursors at 500-800 C., optionally after a pre-heating at, e.g. 300- 500 C. The glasses may be used as fire-retardant additives to composite thermosetting materials, or may be coprocessed with inorganic material or organic thermoplastic polymer to form composite materials.
Patent GB-375631-A (GB)
Title: Improvements in or relating to apparatus for use in playing social games
IPC: A63F5/04
Filed: 1931-09-25
Abstract: 375,631. Board games. WALSS, W., Meggen, near Lucerne, Switzerland. Sept. 25, 1931, No. 26839. Convention date, May 26. Addition to 332,802, [Class 132 (ii), Games]. [Class 132 (ii).] In an improvement on the parent invention the disc 1 is rotatably mounted in a, sleeve 45, fixed in a toothed rim 3 fixedly mounted on a base 5<1>, and is provided with radial guideways 47, Figs. 1 and 2, into which balls 14<1> are inserted through apertures 48<1> in the disc. In operation, the disc being spun by hand, the balls 14<1> move to the outer ends of their respective guideways under centrifugal action, and as the speed falls, roll down the inclined guideway bottoms 47<1> and ultimately come to rest in indentations 49 to lock in the rim 3. The guideways are made wider at their inner ends to prevent the disc coming to rest with a rim tooth opposite a guideway and the pitch of the rim teeth conforms with the angular spacing of the divisions of the game board so that the latter always comes to rest with the playing pieces above respective divisions. The interchangeable playing boards 8, Fig. 3, are positioned on the disc 1 by means of a pin 50 engaging a corresponding hole in the board, fastening clips 52 .. 55, the latter overlapping the pin 50, being provided. The disc may take the form of a wheel 1a Fig. 4, the rim 59 thereof being accessible through slots 58 of the box 6, for manual rotation.
Patent GB-1465632-A (GB)
Title: Optical magnification
IPC: G02B25/00
Filed: 1975-05-12
Abstract: 1465632 Optical magnification COMBINED OPTICAL INDUSTRIES Ltd 12 May 1975 [18 June 1974] 26935/74 Heading G2J An object comprising a spatial arrangement of information (e.g. typographic characters, LED displays or an image on photographic film) which is not resolvable by the naked eye is deliberately spatially distorted in a predetermined manner and is viewed through a singlet biconvex lens so that the resultant magnified image is substantially distortion-free.
Patent GB-284746-A (GB)
Title: Improvements in electric lamps emitting ultra-violet radiation
IPC: A61N5/06
Filed: 1926-10-28
Abstract: 284,746. Robinson, J. Oct. 28, 1926. Low-pressure metallic-vapour apparatus: vacuum tubes.-Ultra-violet ray lamps are provided with a screen which reduces the radiation so that its spectrum is similar, as regards the ultra-violet range, to that of solar light as received at the earth's surface. The screen may consist of mica or of air compressed to a number of atmospheres and contained between double walls of a quartz globe. When the source of rays is an incandescent filament lamp, the quartz bulb may be formed as an air screen as described above, or a coating of powdered mica may be applied to the bulb, or a mica screen arranged either inside or outside the bulb. The bulbs or globes may be arranged to out out a part or the whole of the visible spectrum, as by colouring with nickel chloride. The radiation may be projected from the source on to a quartz and mica screen by a reflector arranged behind the source. In the case of mercury-vapour lamps, neon may be introduced or rhodamine fluorescence screens used to obtain a pleasing visible radiation, or the vapour lamp may be used in conjunction with filament lamps, which may be coloured. Open or closed arc-lamps may be used as the light source. Reference has been directed by the Comptroller to Specification 218,498, [Class 39 (ii), Electric lamps, Incandescent].
Patent GB-1045851-A (GB)
Title: Travelling wave tube amplifier
Inventor: LAMBERT DONOVAN ERNEST CHARLES
IPC: H01J25/38
Filed: 1962-07-13
Abstract: 1,045,851. Travelling-wave tubes. Standard Telephones & Cables Ltd. July 12, 1963 [July 13, 1962], No. 27066/62. Heading H1D. [Also in Division H3] The invention relates to a travelling-wave tube operating in the saturated condition, i.e. as a limiter. As shown, the tube comprises helix 2 coupled at its ends by antenna and quarter-wave choke means 3, 4 to input and output waveguide feeders 5, 6 respectively. Electron gun 7 and collector electrode 8 are supplied from D.C. source 9 and a magnetic focusing field indicated by arrow B is provided. Such an arrangement operating in the saturated condition exhibits an output/input response having successive troughs (Fig. 2, not shown), the position and extent of which varies with the D.C. potential applied to the helix 2. According to the invention, these troughs are largely removed by modulating the D.C. potential applied to the helix with a sinusoidal voltage of frequency low compared to the frequency of the signal applied to the helix. The modulation, which is of the order of 10% of the D.C. voltage, is applied to the helix over transformer 14, and the output of the tube rectified and smoothed in a detector circuit 10.
Patent GB-1003665-A (GB)
Title: Improvements in or relating to electric motor systems
IPC: G06G7/19
Filed: 1964-07-01
Abstract: 1003665 Electric signalling HONEYWELL Inc 1 July 1964 [15 July 1963] 27130/64 Headings H2J J1P J1J J12N1 J12N3Y J12N3A J12N3B J12C J12H2 and J7C [Also in Division H3] To control a variable speed motor a bias voltage from a D.C. potential divider 34-42 connected to a halfwave rectifier 30 and filter 32 controls a silicon controlled rectifier 22 through which a capacitor 20 discharges pulses at a rate dependent on the applied bias, to a pulse stretcher 46 actuating the motor winding 54. A transistor 52 biased through resistors 78, 80 is normally conducting from a power supply 58 with full-wave rectifier 60, 62 through the lower half of the winding 54. A negative pulse on the upper lead from the pulse stretcher 46 biases transistor 50 to conduct through the upper half of the winding 54 and cuts off the transistor 52. The left-hand position of switches 44, 72-76 stops the motor and the right-hand position supplies maximum power direct from the winding 58.
Patent GB-938725-A (GB)
Title: Carton marking machines
IPC: B41F17/26
Filed: 1962-07-16
Abstract: 938,725. Printing-machines. ADOLPH GOTTSCHO Inc. July 16, 1962 [July 25, 1961], No. 27179/62. Class 100 (2). An apparatus for printing on articles such as cartons or boxes comprises a shoot defined by walls 12 and 14 and having a section extending at a substantial angle to the horizontal and along which the boxes A1, A2 &c. move downwardly under the influence of gravity, a starwheel 38 projecting into the path of travel of the articles along said section of the shoot so as to be rotated by the successive boxes moving along said section, and a marking unit 20 including marking means 104, Fig. 3, driven from said star wheel and operative, in response to rotation of the latter, to mark the successive boxes during movement of the latter along said section of the shoot. The shoulders 52 of the star wheel are engaged by successive articles and the rotation of the star wheel is communicated to the die wheel assembly 104 by transmission means 22 including a chain 216. Printing.-The die wheel assembly 104 includes a cylindrical body 106 having a flange 108 at one end and a locking ring 112 on a threaded end portion 110, the marking elements 114 being secured between the flange and the ring. The body 106 is mounted on a shaft 116, one end of which is mounted in a bearing 120 by a removable bearing holder 122, the other end of the shaft 116 being telescopically mounted in an axial bore 124 in a drive-shaft 126 mounted in a bearing 128 by a removable holder 130. The shaft 116 is releasably coupled to the shaft 126 by a pin 132 and the shaft 116 may be withdrawn by pulling a knob 136. The die wheel assembly 104 is selected so that its circumference is a whole multiple of the vertical dimension of successive articles and the assembly is exchanged when articles of a different dimension are to be marked. The unit 20 is adjustably secured in position on the shoot with respect to the path of travel of the articles by a slot and bolt arrangement, Fig. 2 (not shown). Inking.-The inking system 146 is movable as a unit horizontally within the housing of the unit 20 by means of a slot and bolt arrangement so as to accommodate different die wheel assemblies. The inking system includes a roller 172 partially immersed in a fountain 162 having wings 164, said fountain being held in position by a looking screw 168. A scraper 188 co-operates with the roller 172. A metering roller 178 is mounted in arms 184 which, on loosening screws 186, may be rocked about said screws to vary the contact pressure between the rollers 172 and 178. The roller 178 is frictionally driven by the roller 172 which is positively driven by the die wheel assembly 104. The level of ink in the reservoir is maintained constant by a tank 200 which supplies ink to a pipe 202 depending from the top wall 82 of the unit 20. The lower end of the pipe 202 projects into the fountain 162 and is provided with a ball valve 206 which is held open against a spring 208 by a pin 212 projecting from the bottom of the fountain.
Patent GB-151628-A (GB)
Title: An improved resilient tyre
IPC: B60C7/14
Filed: 1920-09-24
Abstract: 151,628. Stichelen, A. van der. Sept. 25, 1919, [Convention date]. Void [Published under Sect. 91 of the Act]. Non-metallic elastic bodies and cores.-A tyre comprises two or more rubber bands A, E with facing projections and recesees arranged to break joint as shown, separated by a band (or bands) C of rubbered fabric in tension. A similar fabric band G is fitted over the outer rubber band E, and the built-up tyre is enclosed in a cover H which may be formed with beaded edges. The recesses D, F are connected by continuous air-passages L. The rim-engaging portions of the tyre may be reinforced with hard rubber insertions M.
Patent GB-1343684-A (GB)
Title: Apparatus for producing electrical energy
IPC: F03B13/02
Filed: 1971-04-19
Abstract: 1343684 Driving dynamos COMPAGNIE FRANCAISE DES PETROLES 19 April 1971 [17 April 1970] 27321/71 Heading H2A [Also in Division F1] A generator 19 is driven by an hydraulic motor consisting of a mass 4 carried by one end of an inclined shaft 5 and located in a turbulence chamber 1 so as to describe a conical path under the influence of fluid flowing through the chamber. The shaft is sealed in an opening 8 in one wall 2 of the chamber by a bellows 7 and has a bush 11 rotatably mounted on its other end which is coupled to a body 10 carried by a shaft 14 driving the generator through a dog clutch 17. The generator and drive from the shaft 5 are enclosed in a sealed, oil-filled easing 3, attached to the chamber 1, the oil serving to equalize the pressure exerted on the bellows by the fluid is chamber 1. The driving fluid may be, for example, oil from an oil well.
Patent GB-874156-A (GB)
Title: Improvements in or relating to radio and television receivers
Inventor: BOULTON DEREK
IPC: H01Q1/24
Filed: 1959-08-10
Abstract: 874,156. Radio receiver aerial arrangements; aerials. PLESSEY CO. Ltd. Aug. 10, 1959, No. 27334/59. Classes 40(5) and 40(7) Wireless or television receivers adapted for V.H.F. reception, comprise a built-in aerial consisting of trim wire elements 3 made of metallic strips, braid or other conductive material, preferably insulated, lying on the outer surface of the receiver cabinet 1. The trim element 3 may form a mono-pole aerial with the end 3a connected to the receiver. A number of parallel trim wire elements may be employed to form loop or frame type aerials. A further trim wire element 4 may be provided for decorative purposes only. The effective length of the trim wire elements 3 may be arranged to correspond to a quarter wavelength and a number of trim elements of different effective lengths may be utilized to provide selective aerials for different wavelength ranges.
Patent GB-948849-A (GB)
Title: Improvements in or relating to amplifying circuit arrangements
IPC: H04M9/08
Filed: 1961-07-28
Abstract: 948,849. Substation circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. July 28, 1961 [Aug. 1, 1960], No. 27470/61. Headings H4K and H4R. In a subset having transistorized amplifiers for incoming and outgoing speech, the threshold level of the outgoing amplifier is arranged to be higher than the maximum signal level produced by signals due to acoustic coupling between the receiver and the microphone so as to eliminate singing. Signals applied to microphone M are amplified by transistor TS2 and are then applied via resistor R2 and circuit R3, TS5, R4 to the base of transistor TS3. Diodes D3, D4 will limit signals passing through the latter circuit when these exceed the threshold level of the microphone amplifier so that signals passed via R2 to TS3 will only be amplified thereat if they exceed the threshold level, they are otherwise cancelled due to the equal but phase inverted signals applied via R4. The values of R2 and R4, in particular, are adjusted so that the maximum level of signals fed from the receiver TL direct to the microphone are lower (after amplification at TS2) than the threshold level signals amplified by TS3 are applied via emitter follower TS4 and a winding W2 of hybrid transformer S to the line. Incoming signals are amplified by transistor TS1 which has a signal limiting network D1, D2 in its collector-base circuit. D.C. power for the amplifier is derived from the line using C1, L as a storage and filter circuit.
Patent GB-253413-A (GB)
Title: Improved device for use in showcard advertisements and the like
IPC: G09F1/06
Filed: 1925-11-03
Abstract: 253,413. Spencer, S. W. Nov. 3, 1925. Show cards ; models. - In show cards having a shaped aperture covered on one or both sides with transparent or translucent material and backed by a curved reflector, the reflector b is detachably connected to the card g by providing it with side flanges f slit at the ends to form tabs d which can be bent over guides e fixed to the back of the card.