baber/WOPTO huggingface dataset:
Patent GB-250931-A (GB)
Title: Improvements in and relating to sound-reproducing apparatus, such as loud speakers
IPC: H04R9/02
Filed: 1926-04-08
Abstract: 250,931. British Thomson-Houston Co., Ltd., (Assignees of Rice, C. W.). April 20, 1925, [Convention date]. Diaphragms; magnetic instruments; loud. speakers.-Relates to sound-reproducing apparatus, more particularly loud-speakers, of the kind in which the diaphragm is actuated by a movable coil located in an air gap in a magnetic field and consists in the provision of a closed circuit of low impedance associated with the magnetic field for lowering the impedance of the actuating coil- In a preferred construction, the low impedance circuit, which acts as a short-circuited secondary, takes the form of a ring or rings of copper &c., embedded in one or both of the pole-pieces. The frustum-shaped diaphragm 1 is secured at its outer edge to a supporting ring 2 by a ring 3 of flexible material, such as silk. rubber, or thin leather. The inner edge of the diaphragm is formed as a cylinder 4 reinforced by inner and outer rings 5, 6, an actuating coil 7 being secured around the inner ring 5 and being disposed in the annular air gap 8 between the concentric polepieces 9, 10. In order to prevent any tendency for lateral movement of the coil 7 in the gap 8, the pole-piece 9 is formed with a projection 12 to which is secured, by a screw 14, a spider 13 having resilient arms 15 connected by radiallyextending flexible links 16 to the inner edge of the diaphragm. The pole-piece 9 is surrounded by a coil 11 to which a steady direct current may be supplied. Rings 17, 18, preferably of copper, are fitted in annular slots in the pole-pieces 9, 10, so as to act as short-circuited secondaries for the actuating coil 7.
Patent GB-755451-A (GB)
Title: Information plotting apparatus
IPC: G01S1/02
Filed: 1954-03-30
Abstract: 755,451. Radar; cathode-ray tube displays. RADIO CORPORATION OF AMERICA. March 30, 1954 [April 27, 1953], No. 9346/54. Class 40 (7). [Also in Group XX] Apparatus for plotting in a given colour the position of radar images which appear on the fluorescent screen 13 of a cathode-ray tube in a different colour comprises a transparent member 17 for receiving the plotting marks and arranged generally parallel to the screen 13 and a dichroic mirror 19 shaped and positioned to lie effectively mid-way between the member 17 and the screen 13 whereby parallax errors in plotting are minimized. The mirror 19 is framed of interference layers which transmit the blue and green light emitted by the screen 13 and reflect red light, the plotting marks made by the pencil 25 being red. Accordingly a red image of a plotting mark is seen by reflection in the mirror 19 superposed on a blue-green radar image seen directly through the mirror 19. Reference has been directed by the Comptroller to Specification 706,530.
Patent GB-706152-A (GB)
Title: Electrostatic precipitators
IPC: B03C3/41
Filed: 1952-04-15
Abstract: 706,152. Electrostatic filters. NEDALO, N. V. April 15, 1952 [April 18, 1951],.No. 9351/52. Class 39(1) An electrostatic precipitator comprises a helical discharge electrode 3 within a tubular collecting electrode 1, the discharge electrode being attached at its ends only, as shown by tight turns 4, to a central support wire 2 so that the turns of the helix may move freely with respect to the support wire. Mechanical oscillations set up in the helix due to the electric discharges prevent the adhesion of dust. The support wire may be of metal, possibly with an insulating covering, or entirely of an insulating material such as nylon. The helix may consist of stainless steel or of an alloy of nickel and chromium. The support wire may be kept extended by a weight or by springs. Two or more helical discharge electrodes may be arranged in the collecting electrode 1.
Patent GB-434963-A (GB)
Title: Improvements in concrete block making machines
IPC: B28B1/04
Filed: 1934-03-26
Abstract: 434,963. Moulding concrete blocks in tamping-machines. MALONE, T., Newtown, Wexford, Irish Free State. March 26, 1934, No. 9361. [Class 87 (ii)] A concrete-block making machine comprises a four-sided frame 1 slidably mounted on uprights 2 which are surmounted by a pallet or plate 8 which coacts with the frame 1 to form a mould box, the frame being connected by a link 4 to an operating hand lever 5, and one or more tampers 7 carried by a rod 14 guided in brackets 12, 13 on a standard 11 and connected by links 17 to an operating hand lever 16. The pallet 8 may be provided with a central division plate 9. The upward and downward movement of the frame 1 are limited respectively by the engagement of the link 4 with a stop 24 on the frame, and the engagement of the lever 5 with a stop 25 on one of the uprights 2. The tampers are raised to the elevated position, in which a collar 27 thereon bears on the underside of the bracket 12, by a spring 20 connected by a rod or link 21 to the base of the machine.
Patent GB-1499478-A (GB)
Title: Container closures
IPC: B65D41/04
Filed: 1976-03-09
Abstract: 1499478 Closures; sealing arrangements A L BOTKIN 9 March 1976 [28 April 1975] 09392/76 Heading B8T A one-piece closure, particularly for use in food preserving, comprises a central cover 22 with a threaded peripheral flange 28, an annular gasket 40 of closed cell foam material bonded to the closure adjacent the flange, and limiter means 42 embedded in the gasket material and extending downwardly of the cover 22 to locally compress portions of the gasket against a container lip more tightly than the gasket material which is circumferentially spaced from the limiter means is compressed against the lip when the closure is screwed on a container. The gasket material is preferably contained within a channel adjacent the flange 28, and the limiter means are in the form of at least three projections formed in the channel. The central cover 22 has, initially, an outwardly dished configuration, and when a vacuum is created in the container, the cover assumes a reversible inwardly dished configuration. The closure is secured on the container prior to heating to drive off steam and create a vacuum, further manipulation of the closure being unnecessary.
Patent GB-166318-A (GB)
Title: Improvements in and relating to the operating means of machine tools
IPC: B21D28/00
Filed: 1920-04-01
Abstract: 166,318. TetÚtleni, A. April 1, 1920. Addition to 141,045, [Class 83 (iv), Metals, Working]. Driving machines.- The driving member 8, instead of the driven member, of gear as described in the parent Specification, is formed in accordance with a work resistance diagram. The driving cam 8 may act directly on the ram 4, Fig. 9, or on an actuating lever 5, Fig. 1. The ram is returned by a spring or positively by using a groove or annular cam or by a cam surface 11 which may be on the cam 8, Fig. 4, on the driving gear 26, Fig. 9, or on the driven member 5, Fig. 7, and engaged by a pin 16 on the cam 8. In the case of a spring or an annular cam, the ram can be raised for adjustment of the tool by reversing the rotation of the driving cam, and the cam surface 11 may be extended as at 11<a>, Fig. 9, for this purpose also. The working or return cam faces may be made detachable as shown in Figs. 1 and 9, and may be inclined gradually at the beginning and then as steeply as the angle of friction will allow.
Patent GB-590155-A (GB)
Title: Improvements in or relating to shaker mechanisms for loading hoppers of mixing machines
IPC: B28C7/08
Filed: 1945-04-16
Abstract: 590,155. Mixing-machines. STOTHERT & PITT, Ltd., and BISHOP, C. E. J. April 16, 1945, No. 9503. [Class 86] A shaker mechanism for the loading hopper of a concrete mixer comprises one or more pivoted levers one end of each of which is caused, by means carried by the axle supporting the hopper when the latter approaches its discharge position, to swing into contact with cam means carried by and rotatable with the mixing drum so that each lever is rocked to impart a jolting action to the hopper. In the discharging position of the pivoted loading skip, 11, Fig. 1, of a mixing drum 6, a pair of projections 3, Fig. 2, on the axle 1 of the skip each operate a pivoted bell crank lever 4 to bring a roller 5 into the path of a pair of diametrically opposed cams 8 affixed to the drum 6. On the rotation of the drum the cams 8 rock the levers 4 to impart a succession of jolts to the axle 1 which is mounted in slotted bearings 2. Each cam 8 is mounted adjustably on the drum 6 by a bolt 9 passing through a slot 10, so that the severity of the jolts imparted to the skip may be varied. The rocking movements of the levers is limited by stops 12 affixed to the mixer frame.
Patent GB-186890-A (GB)
Title: Improvements in or relating to safety locking devices for motor vehicles
IPC: B60R25/021
Filed: 1922-04-03
Abstract: 186,890. Niedmann, F. Oct. 4, 1921, [Convention date]. Guarding against unauthorized use.-The steering-pillar of a motor vehicle is provided with a clamp which can be padlocked to the steering- wheel, this clamp being secured to the pillar by screws which can only turn in the direction in which they are tightened. A second clamp may be provided on the steering-shaft, the two clamps being locked together by a padlock when desired. The clamp comprises two parts 1, 2, which may enclose roughened bushes and are secured together to grip the steering-pillar by screws 3. These screws are formed, as shown in Fig. 4, with ratchet surfaces acted upon by spring-pressed pawls 5, 9 so that the screws can turn in one direction only. The pawls and their springs are located in recesses closed by non-removable screwed or pressed-in caps 8.
Patent GB-715658-A (GB)
Title: Improvements in amplifying circuits
IPC: H03F1/36
Filed: 1952-04-16
Abstract: 715,658. Telephone transmission systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. April 16, 1952 [April 19, 1951; Feb. 8, 1952], No. 9531/52. Class 40 (4) [Also in Group XL (c)] In an amplifying arrangement comprising a main and spare amplifier connected in parallel each having a negative feedback path, the coefficients in the paths are chosen so that the gain of the arrangement remains constant in the event of failure of either amplifier. Alarm devices are described which signal the failure of an amplifier. A signal is fed in over input circuits 1, 2, Fig. 1, and 3, 4 giving attenuation q a , q b  to a main amplifier A and spare B feeding a load 10 over output circuits 7, 8. Feedback voltages Vt a , Vt b  are supplied over resistors 11, 12 and are given by and where E a  and F b  are the voltages set up across the load 10 when the amplifiers B and A are inoperative respectively, and where Uao Ub o  are the average gain of the amplifiers A, B and No the overall amplification and K is smaller than 0.7 or greater than 1.3. Circuit arrangements.-The valve A, Fig. 2, feeds the load 10 over a resistor 7 of equal magnitude, the feedback resistor 11 being twice that of resistor 12 to maintain the gain constant if either valve fails. In a modification, Fig. 3, the anodes are paralleled and feedback for valve A is taken from the screen grid and is thus also effective on valve B. In a further modification, Fig. (4 not shown), an unby-passed cathode resistor provides negative feedback for valve A. A further arrangement, Fig. 5, shows only part of the input fed to valve B with heavier degeneration on valve A due to the tapped cathode resistor 19, 20. Two-stage versions of the amplifiers shown in Figs. 2 and 3 may be employed, Figs. 6 and 7 (not shown). In a three-stage amplifier, Fig. 8 (not shown), the cathode of the first valve in the A amplifier is connected to a tap on the cathode resistor of the output valve while the cathode of the first valve in the B amplifier is connected to a tapping on a resistor joining the cathodes of the output valves of each amplifier. Alarm arrangements.-Since on the failure of the main amplifier A the output from the spare amplifier B increases the output may be arranged to operate an alarm device. Failure of the B amplifier, may cause an auxiliary oscillation to cease, either because the B amplifier oscillates at a frequency outside the normal passband or passes this frequency fed to it from an outside source. The increase in distortion due to the failure of one amplifier may be utilized to operate an alarm.
Patent GB-472180-A (GB)
Title: Improvements relating to sedimentation tanks or reservoirs
IPC: B01D21/06
Filed: 1936-04-01
Abstract: 472,180. Gravity-separation apparatus. FARRER, W. G., and DAVIS, C. April 1, 1936, No. 9572. [Class 111] Liquid is supplied to a settling- tank through an annular channel 2, the inner wall of which forms a weir, and is discharged through a central outlet 5. The settled sludge is pushed into hoppers 6 adjacent the wall of the tank by scrapers 7 on arms 8 depending from shafts 9. The shafts 9 are attached to shafts 10 supported by wheels or rollers 11, driven -by an electric motor 12.
Patent GB-664075-A (GB)
Title: Improvements in cups, saucers, jugs and like crockery
IPC: A47G19/22
Filed: 1949-04-08
Abstract: 664,075. Cups, saucers and jugs. DAVIS, W., and JONES, H. S. April 3, 1950. [April 8, 1949] No. 9585/49. Class 128. [Also in Group XVII] Cups, saucers and jugs are each formed with a hole therein below the usual liquid level, closeable by a liquid-tight removable disc. As shown, a hole a is provided in the bottom of each article and a recess formed above the hole so that a flange b extends over the hole. A disc c of any suitable material fits in the recess supported on the flange b. The disc in the cup bottom is waterproof and that in the saucer may be water absorbent or waterproof.
Patent GB-820467-A (GB)
Title: Improvements relating to seats
IPC: B62J1/20
Filed: 1957-03-23
Abstract: 820,467. Attaching upholstery. PULLEY, T. L., PULLEY, L. W., PULLEY, A., and PULLEY, S. N. March 21, 1958 [March 23, 1957], No. 9603/57. Class 52(4) [Also in Groups XXV and XXXI] Upholstery 4 and an edging strip 5 are attached to a depending flange 2 of a seat 1, e.g. a combined motor cycle saddle and pillion, by S-shaped clips 6, one channel 7 of which takes into a channel in strip 5 and has prongs 9 entering the upholstery 4 and the other channel 8 of which receives part of strip 5 and has either prongs 10, Fig. 4 and 7, entering the strip or a bulge 11, Fig. 6, fitting a projection 12 on the strip. Preferably the upholstery is folded over the extremity of flange 2. The strip may have a part concealing the rear of the clips.
Patent GB-472908-A (GB)
Title: Improvements in and relating to the tempering of glass
IPC: C03B27/044
Filed: 1936-04-01
Abstract: 472,908. Tempering glass. SOC. ANON. DES MANUFACTURES DES GLACES ET PRODUITS CHIMIQUES DE ST.-GOBAIN, CHAUNY, & CIREY. April 1, 1936, No. 9641. Convention date, April 6, 1935. [Class 56] A method of cooling a glass sheet in the operation of tempering consists in directing against the glass a stream of cooling medium, such as air, which is substantially uniform along a line at least as long as the width of the sheet, and in moving the stream at a substantially uniform speed along the sheet from one edge to another. In the apparatus shown in Fig. 3, the glass sheet 1. is suspenaea between two blowing-chambers 6 carried by frames 12 which are supported on rollers 9 and are reciprocated horizontally by mechanism such as a rotating crank disc 11a. The inner face of each blowing chamber 6 is formed with a vertical slot 5, longer than the width of the sheet 1, through which a stream of air is projected against the sheet. The slot reciprocates between the positions 5a, 6b, the distance between which is greater than the length of the glass sheet, so that the streams of cooling air sweep over the whole length of the sheet from one edge to the other. Instead of a single slot 5, a number of slots may be formed in the faces of the blowing- chambers 6. In a modified construction, the slots are formed in endless bands of flexible material which are moved constantly across an opening in the inner sides of the blowing- chambers. In another construction, the slots may be formed in tubes which are mounted on endless chains, or on rotating discs, and are carried continuously past the glass sheet. The sheet may be moved while the jets remain stationary, and in this case the sheet 1, Fig. 19, may be carried between two parallel lines of stationary jets 68, air being admitted only to those jets between which the sheet is passing. Preferably the jets consist of slots, but they may consist of a number of holes in line and close together. They may be arranged to direct the air at an inclination to the surface of the glass, and blowing jets 73; Fig. 21, may be combined with suction jets 74. The blowing jets may be replaced by suction jets in which a suction tube 75, Fig. 22, has lips 76 that direct the air over the surface of the glass sheet.
Patent GB-928718-A (GB)
Title: Improvements in or relating to pulverizing mills
IPC: B02C15/00
Filed: 1962-03-13
Abstract: 928,718. Edge-runner mills. W. BERZ. March 13, 1962 [March 14, 1961], No. 9705/62. Class 59. In an edge-runner mill in which grinding rollers 1 are pressed against a rotary table 7 by means of a spring-loaded ring 2, each roller 1 is carried at one or each side in a circular plate 4 which can roll against the ring 2 and each plate is subject to the pressure of a spring 6, the arrangement being such that the rollers can swing in a direction corresponding to the direction of rotation of the table 7 in opposition to the effect of the springs 6. The springs 6 are anchored at their upper ends to the ring 2 or to the mill casing 8; alternatively, the springs can be anchored at their lower ends to the plates 4.
Patent GB-455128-A (GB)
Title: Improvements in and relating to colour photography
IPC: G03C7/30
Filed: 1935-06-01
Abstract: 455,128. Colour photography. KODAK, Ltd., Kingsway, London.-(Eastman Kodak Co. ; 343, State Street, Rochester, New York, U.S.A.) June 1, 1935, No. 9734/36. Divided out of 447,092. [Class 98 (ii)] A photographic record in the minus colours of the original is produced by converting into coloured image records superimposed latent image records of different colour sensations covering substantially the whole of the visible spectrum which have been produced respectively in at least three gelatine-silver halide emulsion layers inseparably coated on the same side of a single support by a single exposure of all the layers from one face whereby such latent images lie accurately superimposed and mostly in the corresponding strata of each layer, and submitting the emulsion layers without reversal of the images therein to a colour developer whose penetration is so controlled as to restrict the development to an upper layer or layers. The film, after exposure, is slightly tanned, developed in an ordinary developer, fixed, washed, and bleached with an ammoniacal ferricyanide or hydrobromic acid oxidizing bath. The images are, if necessary, rendered redevelopable by exposure'to light and the uppermost image is developed to minus blue in a developer containing p-aminodimethylaniline sulphate, 4-nitroacetoacetanilide and iso-propyl alcohol as loading agent, then the next image is developed to minus green in a developer containing 2-amino-5-diethylaminotoluene hydrochloride, potassium thiocyanate, p-nitrophenylacetonitrile, and isopropylalcohol, and the bottom image is developed to minus red in a developer. containing p-aminodiethylanilinemonohydrochloride, potassium thiocyanate, and m-hydroxydiphenyl, the film being thoroughly dried between each development. The metallic silver is removed by Farmer's solution and the film is washed and dried. In a modification, the image in the top layer only is redeveloped to silver, the images in the remaining layers are colour developed by controlled penetration, and the image in the top layer bleached and colour developed. The sensitive layers may also be on plates or paper, and the films may carry a sound track. Specifications 245,198, [Class 98 (ii)], 376,838, 427,518, 447,092, 453,233, and 454,622 are referred to.
Patent GB-444366-A (GB)
Title: Improvements in etching processes applicable for the production of moulds, shaped articles or patterns
IPC: B44C1/22
Filed: 1935-03-29
Abstract: 444,366. Etching. KLUMPP, A., Berndorf, near Vienna. March 29, 1935, No. 9804. Convention date, March 29, 1934. [Class 100 (ii)] Designs are transferred from models of various kinds, which may include engraved patterns, objects of nature, &c. to metals, glass, or other materials capable of being etched by a process which consists in taking a plaster cast from the model and employing this cast to remove the resist from a coating of resist on the material to receive the design The resist employed is preferably an acid-resisting varnish, and the plaster cast may be taken from a preliminary wax cast taken from the original. Ordinary or electrolytic etching may be employed, and the etching process is carried out in several stages with a repeated application in register of the plastic cast to the resist. The process may be used for etching designs in hard steel dies, and may be used for renewing designs which have become inaccurate through repeated use of the die, or by the application of hardening processes to the die. Specification 18587 /99, [Class 101], is referred to.
Patent GB-1498094-A (GB)
Title: Composition comprising a rubber-modified polystyrene resi
IPC: C08L51/02
Filed: 1975-03-10
Abstract: 1498094 Resinous block copolymer composition SUMITOMO CHEMICAL CO Ltd 10 March 1975 [9 March 1974] 9894/75 Headings C3P and C3G A resin blend comprises (a) a rubber-modified polystyrene and (b) a transparent resinous block copolymer containing 65 to 95% of styrene and 5 to 35% of butadiene. Component (a) may be obtained by mixing the preformed rubber and polystyrene or by polymerizing the styrene in the presence of the rubber. A wide variety of structures for component (b) are given, including homopolymer, random copolymer and tapered copolymer blocks, obtained by sequential anionic polymerization using, e.g. polar modifiers and continuous, intermittent or batchwise addition of monomers. Examples refer to blends of (a) a polymer obtained by grafting styrene on to polybutadiene and (b) 5-b-ScoB- b-S or S-b-ScoB-b-B-b-ScoB-b-Scopolymerswhere S is styrene and B is butadiene, while comparative procedures refer to blends in which component (b) is a rubbery butadiene-styrene block copolymer.
Patent GB-141368-A (GB)
Title: Improvements in and relating to colour photography
Filed: 1920-04-08
Abstract: 141,368. Dourlen, J., and Chretien, M. Jan. 8, 1919, [Convention date]. Kinematograph, reflecting, a n d three colour systems.-Relates to apparatus f o r colour photography in which a single objective and rotating mirrors are used for successively exposing sensitized plates or films in sequence to obtain colour negatives, and consists in arranging the mirrors in pairs so that the plates cr films may be exposed at a higher speed. In the apparatus shown, two pairs of mirrors N<1>, N<11> mounted on the axes x x, y y, respectively, are rotated by bevel gearing to expose the plates or films in the planes I and II, the third plate or film in the plane III being exposed by direct rays. The apparatus is also adaptable for projection. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the use of sliding mirrors. This subject-matter does not appear in the Specification as accepted.