baber/WOPTO huggingface dataset:
Patent GB-532791-A (GB)
Title: Improvements in or relating to apparatus for extraction of dust, grit and the like from gases
IPC: B61G7/04
Filed: 1939-09-20
Abstract: 532,791. Centrifugal dust extractors. CORINTH, Ltd. Sept. 20, 1939, No. 26267. Convention date, Sept. 22, 1938. [Class 23] A centrifugal dust extractor of the cyclone type has a tangential inlet c for the dust-laden gases arranged vertically in conjunction with a separator head having a horizontal axis. The body of the separator is built up of sections which produce a curved effect and ensure that the outlet g for extracted material is in a vertical position. The axial outlet d for clean gas is disposed horizontally and is connected to a suction fan e. Instead of being curved as shown in Fig. 3, sections of the body may be of conical form with straight axes and they are put together to form a body of approximately the same form as that shown. A combination of separators may be used; four separators for instance are shown in Figs. 7, 8, with their tangential inlets supplied from the vertical pipe a, and the clean gas outlets d communicating with the vertical discharge pipe k.
Patent GB-206492-A (GB)
IPC: B65H75/18
Filed: 1923-10-22
Abstract: 206,492. Akt.-Ges. fiir Anilin-Fabrikation. Nov. 3, 1922, [Convention date]. Void [Published under Sect. 91 of the Act]. Cop type.-Bobbins or spools, particularly those for use with artificial threads, of the kind provided with a perforated winding surface are provided with a conical mouthpiece c at one or both ends, of such length that the bobbin is truly centred on the winding-spindle and that a tight joint is secured when liquid is introduced into the bobbin, whereby threads may be spun, washed under pressure, bleached and, if necessary, dyed, and then dried and finally twisted from the same bobbin.
Patent GB-752174-A (GB)
Title: Improvements relating to the forming of grinding wheel surfaces on cylindrical grinding machines
IPC: B24B53/08
Filed: 1954-09-11
Abstract: 752,174. Trueing grinding wheels. LUND, Ltd., J., and DAVID, C. L. Sept. 11, 1954, No. 26367/54. Class 60 A tailstock incorporates a grinding wheel forming device having an . intermediate slide B and a top slide H on which is mounted the forming tool J. The slide B is moved on a base slide A by a piston D and a cylinder C while the slide H is moved by a cam L and a followed M which are held in contact by a piston O and a cylinder N. When changing the cam L for a different grinding operation, a setting gauge (not shown) is mounted between the workhead and the tailstock centre E to enable the tool J to be quickly set to the new position. The centre E is mounted in a sleeve T inclined at a small angle and adapted to be adjusted by means of two nuts V to enable the centre E to be aligned with the workhead. During grinding the centre is loaded by a spring P carried in a, housing Q which has a bayonet slot to engage a pin R so that the housing may be readily withdrawn.
Patent GB-998377-A (GB)
Title: Improvements in washing machines for web material
IPC: D06B3/10
Filed: 1964-06-26
Abstract: 998,377. Textile treating apparatus. E. JUSTERS, [trading as EDUARD KUSTERS MASCHINENFABRIKJ. June 26,1964 [June 29, 1963], No. 26435/64. Heading D1L. A washing machine for washing wide webs of textile fabric, of the type in which the web 2 travels through the wash tank 1 in a substantially vertical zig-zag manner carried by rollers at different heights, the lower rollers 3 being immersed in the wash liquid which liquid enters the machine through an inlet 4 at the same end as the web 2 emerges therefrom and leaves through an outlet 5 at the same end as the web 2 enters the machine, and which is formed with a plurality of partitions 8 extending longitudinally of the tank 1 in the gaps between the rollers 3, is characterized in that the outlet 5 is arranged at a lower level than the upper edges 10 of the partitions 8 and lower openings 9a are formed adjacent the bottom of the tank 1 through the partitions 8 at alternate ends thereof. The inlet 4 is at a greater vertical height than the outlet 5 which is formed in a wall of the tank 1 so that liquid overflows through the outlet. The partitions 8 are arranged with spaces 9 at alternate ends thereof so that liquid flows through in the direction of the arrows 11, Fig. 2. A slide 12 is located in each space 9 and has a height less than that of the partition 8. The slide 12 is operable by a rod 13 so that a lower opening 9a, Fig. 3, or an upper opening 9b, Fig. 4 (not shown), is formed. Alternatively, the slide 12 may be in an intermediate position to form both upper and lower openings. The opening 9a allows heavy dirt to move towards the outlet 5 and the opening 9b permits lighter dirt carried by lather to move in this direction.
Patent GB-445543-A (GB)
Title: Improvements in or relating to electrical high frequency oscillating circuit arrangements
IPC: H04B1/30
Filed: 1934-09-14
Abstract: 445,543. Valve circuits for wireless reception. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Electra House, Victoria Embankment, London, and RUST, N. M., 109, London Road, Chelmsford. Sept. 14, 1934, No. 26464. [Class 40 (v)] The natural frequency of an oscillating high frequency circuit of a radio receiver is automatically varied in dependence on departures from exact tuning by a reactance associated with the circuit, constituted by the Miller effect between two electrodes of a thermionic valve. In Fig. 1, the local oscillator of a homodyne receiver is constituted by the two grids 4, 5 and cathode of a heptode 1, the control grid 7 of which receives signal energy for frequency-locking purposes. The circuit 16 feeding the homodyne detector (not shown), is coupled to the frequency determining circuit 11, 12 of the oscillator across which is connected the control grid-cathode circuit of the pentode 31 constituting a variable reactance. The cathode circuit of the heptode 1 includes a low-pass filter 24, 26, 27, the output from which is applied through potentiometer 25 to the control grid of the thermionic reactance 31. A variable condenser 32 is connected between control grid and anode of 31. Beat frequencies due to frequency difference between the oscillator frequency of 11, 12 and the incoming frequency are applied to vary the reactance of valve 31 in such sense as to correct the frequency of 11, 12 until the beats disappear. The anode circuit of heptode 1 may be utilized to indicate beats for facilitating adjustment, by the dotted line circuit including an amplifier 41. In Fig. 2 part of the intermediate frequency energy of a superheterodyne receiver is applied to a double circuit A, B tuned as a whole to the intermediate frequency, branch A being tuned above and branch B below that frequency. The outputs from each branch are separately rectified at 46a, 46b and taken off from potentiometers 47a, 47b, the arrangement being such that when branch A is effective the point 49a is positive with respect to the cathode of the pentode reactance 31, while when branch B is operative 49b is negative. The reactance of the control grid-cathode circuit of 31 varies the frequency determining circuit of the local oscillator which is connected across terminals 13, 60. Instead of the rectifier arrangement shown in Fig. 2 a double-diode triode valve may be employed, but the remainder of the circuit is similar, Fig. 3, (not shown).
Patent GB-959977-A (GB)
Title: Manufacture of paper products from fibers wet-spun from polymer blends
IPC: D01F6/54
Filed: 1960-08-02
Abstract: Paper is made by preparing wet-spun fibres from a solution containing a blend of an acrylonitrile polymer and a cellulose ester, beating the fibres in an aqueous slurry to fibrillate them, sheeting out the beaten fibres, and drying.  The polymer may be polyacrylonitrile or a copolymer containing at least 85% by weight of combined acrylonitrile and one or more other monomers copolymized therewith or a blend of polyacrylonitrile, or a first copolymer with a second copolymer.  The other monomer or monomers may be mono-olefinic; a list of suitable monomers is given in the Specification.  The cellulose ester is that of a lower fatty acid, e.g. the acetate, propionate, acetate formate or acetate-butyrate. The blend of polymer and cellulose ester has an average specific viscosity of 0.1 to 0.4.  The fibres may be made by dissolving the polymer and the ester in a solvent, e.g. dimethylacetamide or dimethylformamide extruding the solution through a spinneret into an aqueous coagulating bath, to produce filaments, and cutting these filaments to staple length.  The filaments may be stretched, and may be but preferably are not "collapsed" to destroy their porous structure.  The fibres may be used alone or mixed with other fibrillatable artifical or natural fibres, e.g. of wood or cotton.  During the beating, an antifoaming agent such as octyl alcohol may be used if necessary.  Suspension may be improved by deacetylated Karaya gum.  The paper may be sized with a conventional resinous or potentially resinous substance by beater-addition or by treatment of the water-leaf.  The product may be flexible or stiff, thick or thin, and may be a sheet, board, or moulded article, and may be used for currency, abrasive paper, tabulating cards, photographic base, maps and charts, impregnated paper, and filters.  The Specification also describes for purposes of comparison paper made from fibres comprising only a copolymer of acrylonitrile and vinyl acetate, paper made from fibres comprising only cellulose acetate, and paper made from a blend of fibres of these two kinds.
Patent GB-244242-A (GB)
Title: Improvements in caps for personal wear
IPC: A42B1/24
Filed: 1924-11-10
Abstract: 244,242. Myers, J. W. Nov. 10, 1924. Caps; linings; devices to prevent head coverings being taken in mistake.- To enable a trader's name label to be readily attached to a cap a greaseproof transparent tab D is stitched at three sides to the lining B of the cap forming a pocket into the open side A of which the label C is inserted.
Patent GB-182753-A (GB)
Title: A sealing device for travelling grate furnaces
IPC: F23H11/18
Filed: 1921-10-10
Abstract: 182,753. Zellstofffabrik Waldhof, and Schneider, A. July 2, 1921, [Convention date]. Grates.-A sealing-device mounted above the rear end of a travelling grate and of the kind described in Specification 136,170 consists of a rotary member a, of cylindrical or prismatic form, freely suspended on chains or the like d by which it is rotated. It is preferably formed with grooves to receive the chains, and may be in one or more hollow parts with end flanges and with internal ribs z for cooling purposes as shown in Fig. 3. It may also be formed with openings for the passage of a cooling-medium. The shaft g from which it is suspended, and through which it is driven by chain gearing from the rear shaft of the grate as shown, or otherwise, is also adjustably suspended by chains from an upper shaft s. The shaft g may be free or be mounted in bearings free to slide in vertical or inclined slots, or it may be attached by rods t' to a fixed point, such as the shaft o. The surface of the sealing-member may be smooth, or provided with ribs or projections as shown. A covering plate v to exclude air may be fitted as shown, to rest on the sealing-member, and this may be formed with cooling-ribs. According to the Specification as open to inspection under Sect. 91 (3) (a) the member a may contain loose balls to grind up any cinders that may enter it and the various sprocket wheels of the driving-gear are keyed on their shafts with a certain amount of play to allow for the oscillation of the chains. This subject-matter does not appear in the Specification as accepted.
Patent GB-313378-A (GB)
Title: Improvements in apparatus for treating fabrics with liquors
IPC: D06B3/16
Filed: 1928-09-19
Abstract: 313,378. Hunt & Moscrop, Ltd., Hunt, E. W., and Hunt, E. F. Sept. 19, 1928. Spraying travelling materials; circulating fluids through materials; piled and packed materials, treating with fluids.-Fabrics, particularly artificial silk fabrics, plaited on to an endless lattice conveyer A, are sprayed on one side by sprays B and on the reverse side by a spray c situated in the loop which is formed by passing the fabric over an intermediate winch E. The sprays are fed by a circulating pump C<1>.
Patent GB-1270281-A (GB)
Title: A packaging bag
Inventor: DREYFUS ROBERT LEE
IPC: B65D75/58
Filed: 1969-05-27
Abstract: 1,270,281. Tear tabs for heat shrinkable bags. W. R. GRACE & CO. 27 May, 1969 [27 June, 1968], No. 26823/69. Headings B8C and B8K. In order to facilitate the removal of an article such as a turkey or ring bologna from a plastics bag 10 heat shrunk therearound, at least one tab 21 having a tear initiation notch 20 is provided on the bag's lower edge. To open the bag the tab 21 which normally lies flat against a bag side is lifted and pulled across the bag bottom to remove a tear strip (31, Fig. 5) formed from a heat seal 17 and a skirt (18, Figs. 1, 3). The bag may be made from lay-flat tubing composed of biaxially oriented cross-linked polythene or vinylidene chloride-vinyl chloride copolymer. In a second embodiment tabs (36, 37, Fig. 7) are provided at the centre of the seal 17.
Patent GB-819334-A (GB)
Title: Improvements relating to ear tags for marking sheep and other animals for identification purposes
IPC: A01K11/00
Filed: 1957-08-26
Abstract: 819,334. Ear tags for marking animals. GOLDBERG, H. Aug. 26, 1957 [Sept. 7, 1956; March 15, 1957], No. 26881/57. Class 73 An ear tag for marking sheep and other animals comprises an apertured base part and a co-acting stud part provided with a head adapted to be a press or force fit in the aperture of the base part. The arrangement is such that the stem of the stud part or a boss on the base part, in which the aperture is provided, is passed through a prepared hole in the animal's ear prior to pressing the two parts together. As shown in Fig. 1 the two parts 10, 11 are made of plastic material such as polystyrene or polyethylene and the stud part 10 has a head portion 13 which engages behind a shoulder formed by an annular recess 14 in the rear side of the part 12. The head part may be slotted cruciform fashion to facilitate insertion in the aperture. In another embodiment Fig. 2 the stud part 19 which may be made of aluminium or brass has a rounded head 21 which engages behind a shoulder 22. The boss 17 on the base part 16 is provided with a diametrical slot 18. In another form the stud part 24, Fig. 5, has a stem part 25 which is slotted diametrically, the aperture in the base part 26 being radiallyslotted to provide tongues which engage in a circumferential locking groove 28 in the stem 25.
Patent GB-459202-A (GB)
Title: Improvements in luminous number plates and other luminous signs
IPC: B60Q1/56
Filed: 1935-09-30
Abstract: 459,202. Picture frames &c. McKNIGHT, W. C., 130, Alderman Road, Glasgow. Sept. 30, 1935, No. 26925. Drawings to Specification. [Class 11] [See also Group XVIII] The front of the casing of an internallyilluminated vehicle number plate is grooved on three sides to receive the edges of the plate and is provided with a detachable channelled part on the fourth side to secure the plate in position.
Patent GB-971568-A (GB)
Title: Production of polyvinyl alcohol
Inventor: WATTS PETER WILLIAM JOHN
IPC: C08F8/12
Filed: 1962-07-13
Abstract: Partial esters of polyvinyl alcohol are prepared by reacting a polyvinyl ester with an aliphatic alcohol containing 5 to 20% by weight of water in the presence of cyclohexane in amount insufficient to cause the reaction mixture to separate into two phases, and an alkaline catalyst.  The polyvinyl ester may be polyvinyl acetate, formate, propionate or butyrate.  The catalyst may be an alkali metal hydroxide or alcoholate or a quaternary ammonium hydroxide. Examples describe the reaction of polyvinyl acetate with aqueous methanol in the presence of cyclohexane and sodium hydroxide.
Patent GB-1278477-A (GB)
Title: A camera having an automatic warning indicator
Inventor: EAGLE JOHN HOWARD
IPC: G03B13/02
Filed: 1969-05-28
Abstract: 1278477 Warning signal indicators EASTMAN KODAK CO 28 May 1969 [28 May 1968] 26971/69 Heading G2A A camera has a viewfinder comprising an objective element 14 and an eye-piece 15, and light from a lamp 21 which is indicative of illumination conditions is reflected into a peripheral part of the observer's eye. As shown, light transmitted through the eye-piece lens 15 enters the observer's eye at a maximum half-angle α with respect to the axis 16. When the shutter 6 is opened, light entering the main objective 2 passes through a variable diaphragm 5 to fall on the photo-sensitive surface 4. The diaphragm aperture is varied according to the incident light as sensed by a photo-cell 13 which controls the diaphragm by means of a coil 9 and core 10. The lamp 21 is included in a circuit, Fig.3 (not shown), which also includes the photo-resistive cell 13 and a transistor 24. When the scene light is too low for a satisfactory exposure, the lamp is energized, and the light from it is reflected through a small aperture 20 in the camera housing adjacent the viewfinder aperture itself to the observer's eye. It reaches the eye at an angle greater than α, and falls on the peripheral or extra-foveal portion of the retina, which is more sensitive, thus alerting the observer. When the scene light becomes sufficient, the lamp 21 is by-passed, and goes out.
Patent GB-649262-A (GB)
Title: Improvements in or relating to noise limiter circuit arrangements
Inventor: HEAD LEONARD RUSSELL
IPC: H03G11/04
Filed: 1947-10-08
Abstract: 649,262. Radio interference suppression circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Oct. 8, 1947, No. 27048. [Class 40 (v)] In a noise limiter circuit for a radio receiver having a rectifier associated with a time constant circuit such that it is blocked during the presence of steep noise impulses, the signal demodulator has its anode earthed, and the output is taken from the anode of the noise limiter rectifier, the cathode of which is conected to the demodulator load resistance. Fig. 3 shows part of a superheterodyne receiver in which intermediate frequency signals are fed to tuned circuit 3, and a demodulator diode 4 produces audio signals across the load resistances 5, 6, a positive potential being developed at the upper end of these resistances. Audio signals are applied through diode 10 and potentiometer 16 to the low-frequency output stages. The diode 10 is normally conducting due to the potential developed across resistance 5, but is associated with a time-constant network 11, 12, 13, so that diode 10 is rendered non-conducting during the presence of a steep noise impulse, thus interrupting the signal path and preventing the noise from reaching the output circuits. The addition of diode 18 improves the arrangement by providing a low-impedance path to audio frequency across the output circuit during noise impulses. The Specification acknowledges as known, a similar circuit, but in which diodes 1, 10 and 18 are reversely connected, the arrangement according to the invention resulting in reduced impedances between the cathodes of diodes 10 and 18, and earth, so that hum due to the diode filament alternating current supply is reduced.
Patent GB-731232-A (GB)
Title: Sound film apparatus with magnetic sound reproduction means
IPC: G11B15/34
Filed: 1953-10-02
Abstract: 731,232. Automatic synchronizing systems for sound film apparatus. SEIFFERT, M. Oct. 2, 1953 [Oct. 9, 1952], No. 27161/53. Drawings to Specification. Class 38 (4). [Also in Group XXXVIII] In a sound film apparatus comprising a magnetic sound reproducer and a cinematograph projector driven by separate motors and using separate sound and image bands, the speed of one of the motors is regulated by a device responsive to changes of tension in one of the bands, e.g. by a variable series resistance, controlled by a movable spring-loaded arm displaced by changes in the length of a loop in one of the bands. As described, the sound and image bands are fed on to a single take-up reel.
Patent GB-191477-A (GB)
Title: Improvements in or relating to lasting machines
IPC: A43D75/00
Filed: 1921-10-13
Abstract: 191,477. Gimson Shoe Machinery Co., Ltd., and Bagshaw, C. M. Oct. 13, 1921. Lasting. - A ma. chine of the bed-lasting type comprises in combination means for inserting a plurality of fastening tacks through movable wiper plates into the edge of the upper and automatically-acting means to effect close engagement of the work with a flexible heel band. The last 1 is supported on a jack 2 adjustably attached to a post 3 and having an adjustable toe post 13. The post 3 is slidable in a bearing 4 pivoted to the frame 6, and rests on a spring-supported step 7 on a lever 9 operated for vertical movement by a rod 10, lever 11 and cam 12 on the cam shaft 35, and if desired by a treadle also. The last is drawn into contact with the heel band 20 by a treadle 31, rod 30 and bell-crank lever 28 one arm of which engages a pivoted lever 24 yieldingly connected through a rod 25 and spring 77 with the jack. The other end of the lever 24 engages a cam 76 on the cam shaft adapted to impart backward pressure to the jack. The clamp 20 is slidably adjustable in a bed 19 within which is also slidable a box 32 having arcuate guideways for wiper-plates 33. The box 32 is reciprocated by an eccentric 34 on the shaft 35 in conjunction with springs 36 through an adjustable lost-motion rod 37, opening and closing of the wiper plates being effected by racks 38, 40 and pinions 39. A hand-lever 43 is provided for initially testing the setting of the work in relation to the wipers. Each wiper plate has a series of cupped holes 48 in which rest driver tubes 50, the other ends of which are slidable in rounded holes 51 in a bracket 52. Each tube 50 comprises a spring- supported driver bar 53 and driver 54 and a tack tube 58 and a tack throat 56 having a spring- held bevelled pin 60 for retaining tacks before driving. The bars 53 project upwardly and are each engaged by adjustable tappets 65 on a bar 63 when tacks are to be driven. The bar 63 is operated by a spring 64, but is normally held elevated by a pivoted catch 68 on a slide-rod 69 actuated by a cam 70. The catch engages with a nose 71 on the bar 63 and is turned on its pivot to release the bar 63 by the engagement of an adjustable block 73 on the cam 70 with an arm 74 attached to the catch. Stoppage of the machine at a particular stage in the work is rendered possible by the provision of a clutchcontrolling cam having two gaps into which a roll on the controlling-handle 75 can drop at each half-revolution unless prevented by the operator. In operation, the treadle 31 is depressed to move the jack into contact with the heel band and any hand adjustments are made. The machine is now started' by the handle 75 when the cam 76 operates to impart backward pressure to the jack. The eccentric 34 then operates the wiper plates, and the cam 12 next imparts upward pressure to the jack, after which the cam 70 liberates the bar 63 for driving tacks.
Patent GB-340935-A (GB)
Title: Improvements in photographic cameras and picture projecting and viewing apparatus
IPC: G03B41/06
Filed: 1929-09-06
Abstract: 340,935. Optical systems. GRAMOPHONE CO., Ltd., Hayes, Middlesex, MANIFOLD, M. BOWMAN-, Heathcot, Worplesdon Station, Surrey, and TEDHAM, W. F., 267, Woolwich Road, Abbey Wood, London. Sept. 6, 1929, No. 27200. Drawings to Specification. [Class 97 (i).] In apparatus for projecting, viewing or taking pictures, in which the light leaves the object or reaches the image other than normally, means are provided for forming an evenly focussed image and for correcting the dispersion thereby introduced. An achromatic system of prisms may be used. The invention is applicable to the type of projector described in Specification 336,284, [Class 97 (i), Optical systems &c.].