baber/WOPTO huggingface dataset:
Patent GB-496504-A (GB)
Title: Improvements in loud speakers
IPC: H04R1/28
Filed: 1937-06-25
Abstract: 496,504. Loud-speakers. MURPHY RADIO, Ltd., and BRAYSHAW, G. S. June 25,1937, No. 17751. [Class 40 (iv)] A loud-speaker 1 is mounted in a cabinet so that its diaphragm 2 is set back at a slant from the front wall 3 through which sound issues and the peripheral surface of the chamber formed between the diaphragm and the plane of the cabinet wall is lined with sound-absorbent material 5. The gap between the baffle-board 4, on which the diaphragm is mounted and the front wall 3 is closed by an upper wall 6 and side walls. The sound-absorbent material, which is preferably hair-felt, is of a thickness from ¢ to 1" and may be formed with an outwardly inclined surface. According to the Provisional Specification, the baffle-board 4 may be parallel to the front wall 3.
Patent GB-618260-A (GB)
Title: Improvements in beam type hoisting apparatus
IPC: B66C11/20
Filed: 1946-06-13
Abstract: 618,260. Cranes. MALBESIN, E. E. June 13, 1946, No. 17760. Convention date, March 1. [Class 78 (iv)] In a hoisting apparatus of the kind having a vertical support carrying at its top a beam which is movable about a horizontal axis, and one arm of which has a movable grab supporting carriage thereon, the other arm carries a pulley over which the hoisting cable passes, and also co-operates with a rear support comprising locking means for limiting the angular displacement of the beam and locking said beam in either of its limiting positions. The beam 3, pivoted at 2, can be locked in either of its limiting positions by catches 21, 20 and has a pulley 10 slidable thereon, which pulley is attached to a winch 12 by a rope 11 and has a cable 6 passing therearound, said cable also passing over a fixed pulley 9 and pulleys 7, 8 on the carriage 4, and having its ends anchored to the grab 5. Attached to the winch 12 is another cable 13 which passes over a pair of tensioning pulleys, around a brake 17, and is attached to a jawactuating mechanism on the grab. A winch 22 controls both brake 17 and a brake 19 around which latter passes an endless cable 18 which also passes over a fixed pulley 30 and is attached to the ends of the carriage 4. Assuming the beam is engaged by catch 20 and the grab is open and lowered over the spoil, winding of ropes 11, 13 on winch 12 separates pulleys 9, 10 and lifts the grab to the end of the beam and at the same time the jaws 16 are closed by the cable 13 and the release of catch 20 allows the beam to be pulled into engagement with catch 21 by the rope 11. On the release of brake 19 the cable 18 is freed and the carriage and grab slide towards the pivot 2, the slack in cable 13 being taken up by the tensioning loop. Disengagement of winch 12 allows the grab to be lowered over the discharge point and actuation of brake 17 causes the jaws to open and the load to fall. On release of catch 21 the carriage and empty grab tilt the beam back into engagement with catch 21, and operation of the winch 12 lifts the grab and closes the jaws, and on release of brake 19 the carriage is free to return to its endmost position without lengthening ropes 11, 13. Release of winch 12 and actuation of brake 17 allows the grab to drop and the jaws to open ready for another cycle of operation.
Patent GB-809426-A (GB)
Title: Improvements in and relating to cooking ovens
Inventor: BUCKINGHAM JOHN WESLEY
IPC: F24C15/02
Filed: 1956-06-08
Abstract: 809,426. Oven doors. JACKSON ELECTRIC STOVE CO. Ltd. June 7, 1957 [June 8, 1956], No. 17805/56. Class 126 In a cooking oven having one or more grilling elements beneath the top, the vertically slidable oven door has pins at the sides to engage slots formed in vertical side channels of such form that the door may be held fully closed, fully open or partly open, the slots also being shaped to hold the oven door firmly against the oven face. The door i is guided by an upper pair of pins d and a lower pair of pins e running in slots 4 in channel irons c which fit into channel irons b forming the front comer posts and legs of the cooker. Downward and backward slots at the top of the slots 4 engage the upper pins d to hold the door sealed against the frame in the closed position and similar slots k engage the pins d to hold the door in an intermediate position to allow access to a grill pan mounted on runners below the grill burner at the top of the oven. Counterweights f are concealed within the channel members b. The top pins d are retractable against the action of springs 6, to enable the door to be swung about it lower pins e for cleaning. In a modification, retractable friction pads engage the faces of the .channels c to hold the door in the desired position.
Patent GB-742271-A (GB)
Title: Improvements in or relating to hydraulic motors
IPC: B63H25/28
Filed: 1953-06-26
Abstract: 742,271. Hydraulic steering gear. ATLAS-WERKE AKT.-GES. June 26,1953 [June 28, 1952], No. 17815/53. Class 110(2) An hydraulic gearing for steering ships comprises cylinders 1, 2 having arcuate double-acting pistons 3. The cylinders 1, 2 are supported on the hub 11 of a rudder head 10 which is rigidly connected to the piston rods 4, 5, 6, 7 by arms 8, 9. The cylinders are prevented from rotating by spring buffers 14, 15 (not shown) secured thereto and arranged between the stops 16, 17 of buffer blocks 18, 19 which are fastened to the deck of the ship, see also Fig. 3 (not shown). The piston rods 4. 5 or 6, 7 respectively may be in one piece. The cylinders may be centred by the rudder head and carried by adjustable track-supporting rollers installed in the deck of the ship or 'the cylinders may be connected to the rudder head and the pistons fixed to the ship:
Patent GB-1175837-A (GB)
Title: Improvements in or relating to Direct Current Supply Circuit Arrangements
Inventor: HUNTER IAN
IPC: H02M3/337
Filed: 1966-04-22
Abstract: 1,175,837. Converting. MARCONI CO. Ltd. 6 March, 1967 [22 April, 1966], No. 17833/66. Heading H2F. [Also in Division G3] A stabilized D.C. supply is provided at output terminals 33, 34 by the circuit arrangement shown in which a D.C. input 26, 27 to respective halves of a transformer primary winding 24 is controlled by main transistors 15, 16 which are switched alternately by a control circuit comprising members 1, 2, 3, 10, 13, 14, each transistor being " closed " for a period determined by a signal from a comparator 8 to which is applied the D.C. output voltage from point 7 and a pre-determined reference voltage from point 9. The pulse output from a triggered or a free-running oscillator 1 is supplied to a binary divider 2 and a monostable multi-vibrator 3 whose outputs 4, 5, 6 are applied to a gate unit 10 (incorporating an AND gate and an AND-NOT gate) in turn supplying drive amplifiers 13, 14 controlling transistors 15, 16 and a drive amplifier 18 controlling auxiliary transistors 19, 20. These latter transistors are switched on simultaneously or alternately at times when neither of the transistors 15, 16 is conducting and serve to sustain the magnetizing flux in the transformer during these times and to prevent the collectors of transistors 15, 16 rising above the potential of terminal 26. Diodes 21, 22 serve to disconnect transistors 19, 20 when transistors 15, 16 are conducting. The rectangular waveform A.C. produced by the secondary winding 25 is rectified by the bridge 30. Typical waveforms produced in the various parts of the circuits are discussed and illustrated, Fig. 2 (not shown).
Patent GB-627479-A (GB)
Title: Improvements in or relating to electric motor control systems
IPC: H02P7/26
Filed: 1945-07-12
Abstract: 627,479. Control of D.C. motors. IGRANIC ELECTRIC CO., Ltd. July 12, 1945, No. 17845. Convention date, July 12, 1944 [Class 38(iii)] A dynamic breaking circuit is automatically connected across the armature of a D.C. motor where the load current has fallen below the predetermined value. The armature of a D.C. motor 1 is supplied from a transformer 4 through grid-controlled rectifiers 2 and 3. When the current passing to the rectifiers from the transformer secondary winding 4b is low, or is zero, the current transformers 12 and 13 cease to apply blocking potentials through the rectifier 15, to the grid 11c of the gaseous or high vacuum valve 11, which valve hence becomes conductive to close a dynamic braking circuit for the motor armature through resistance 10, until rectifiers 2 and 3 are again conducting sufficient current. The potential applied to the grid of valve 11 is that of the movable tapping on a resistance 14 in the circuit of rectifier 15 When valve 11 is conductive, the condenser 17 becomes charged until the cathode of a further valve 19 becomes sufficiently negative relatively to its grid (which is connected to an adjustable tapping on a resistor 20 connected across the motor armature) for valve 19 to become conductive, whereupon the cathode of valve 11 becomes so positive relatively to its grid that this valve 11 ceases to conduct. The condenser 17 then discharges through resistors 10 and 18, valve 19 ceases to conduct, valve 11 becomes conductive again, and so on Thus valve 11 intermittently connects the resistor 10 across the armature until its grid becomes again sufficiently negative to prevent re-striking once current has ceased. The grids of rectifiers 2 and 3 are supplied by transformers 5 which is, in turn, supplied from a separate secondary winding 4c of transformer 4 through the phaseshifting combination of condenser 6 with variable resistance 7 for varying the motor armature voltage but alternatively the motor excitation may be varied; the motor may be reversible.
Patent GB-503211-A (GB)
Title: Improvements in or relating to secondary electron multipliers
IPC: H01J43/24
Filed: 1937-06-26
Abstract: 503,211. Electron multipliers. ZEISS IKON AKT.-GES. June 26, 1937, No. 17886. Void. Convention date, July 4, 1936. [Class 39 (i)] Successive secondary cathodes are mounted on a common carrier and a single withdrawing electrode is provided. As shown, the multiplier comprises a ceramic envelope 1 with a photo-electric window 5, a secondary cathode surface 3 on a semi-conducting base 2, e.g. of carbon or slate, and a semi-conducting withdrawing electrode 4, and potential falls are created along the electrodes 2, 4. Glass, mica, or negatively-biassed semi-conducting shields may be arranged along the edges of the electrode 2. The surface 3 may be subdivided by scratches. In a modification, a cylindrical secondary-cathode may surround an axial withdrawing electrode. The secondary cathode may be roughened or formed with steps and may comprise caesium or rubidium vaporized onto an antimony or bismuth layer, the electrode being then heated to alloy the materials. In another modification, a withdrawing electrode between plane secondary emissive electrodes comprises semi-conducting rods joined by metal wires. A magnetic field acting on the electrons may be provided.
Patent GB-383301-A (GB)
Title: Improvements in packing cases and like containers for food products
IPC: B65D5/42
Filed: 1931-06-20
Abstract: 383,301. Ventilated cases for food products. USHER, G. B., Rugby Road, Charlottesville, Virginia, U.S.A. June 20, 1931, No. 17936. [Class 18.] A ventilated packing case &c. for food products adapted to be readily assembled from the folded condition, has four sides 1 of artificial semiflexible material such as fibre board, cardboard, paperboard, millboard, pulpboard or other fibrous sheet cellulose material, secured in set-up condition by stapling or stitching a strip 3 to one edge. Some or all of the panels may be apertured for ventilating and each apertured panel is folded over at one edge to form a projection 10 which is consolidated by staples &c. 11. The lid 15 is of metal or material similar to the sides, has flanges 16 engaging within the fold 10, has ventilating apertures 17 at the corners and additional apertures 18 to take flexible metal staples or strips 19 which are introduced before forming the folds 10 and are bent down to secure the lid. The lid may also engage within the mouth of the box. Wings 22, 24 fold in to form the bottom and are stapled or otherwise secured in place. The container is preferably filled from the bottom. The angles between the sides need not be right-angles and the sides need not be rectangular.
Patent GB-229931-A (GB)
Title: Improvements in flower holding devices applicable to bowls
IPC: A47G7/07
Filed: 1924-07-29
Abstract: 229,931. Baker, A. L. July 29, 1924. Flower holders.-A flower holder of the kind which are attached to bowls to enable cut flowers to be arranged and retained around the inner edge, is formed of flexible material to rest against the edges of bowls of different size. Fig. 1 shows a form made out of a strip of flexible metal 2, provided with hooks 6 to engage the edge of the bowl and bent to form a series of conical sockets 5 for the reception of flowers. Fig. 2 shows a form made out of wire and formed with hooks 7 and a series of loops 8 for the reception of flowers.
Patent GB-704053-A (GB)
Title: Manufacture of para-substituted phenyl-thioureas
IPC: C07C335/16
Filed: 1952-07-17
Abstract: The invention comprises para-substituted phenylthioureas of the formula <FORM:0704053/IV(b)/1> in which R1 is an alkoxy, alkylmercapto, hydroxyalkoxy, alkoxyalkoxy or alkylmercapto-alkoxy group, and R2 is an alkylmercapto, hydroxyalkoxy, alkoxyalkoxy or alkylmercapto-alkoxy group, and in which the sum of the carbon atoms and oxygen and/or sulphur atoms in each of the groups R1 and R2 is greater than 2 and less than 7.  They may be prepared, for example, by reacting a suitably substituted aniline with carbon disulphide or thiophosgene to give compounds in which R1 and R2 are alike, or with a substituted phenyl isothiocyanate to give compounds in which R1 and R2 differ.  The reactions may be carried out in a solvent such as alcohol or dioxan.  A catalyst such as hydrogen peroxide, sulphur, potassium ethyl xanthate or potassium hydroxide may be present in the reaction with carbon disulphide, and alkali metal hydroxide or carbonate may be present to bind hydrochloric acid in the reaction with thiophosgene.  Examples are given of the reaction of (1) p-(2 - ethoxyethoxy) - aniline or p - (2 - hydroxyethoxy)-aniline with carbon disulphide, (2) p-(b  - ethylmercaptoethoxy) - aniline with carbon disulphide, (3) p-(b -ethoxyethoxy)-aniline or p-(b -hydroxyethoxy)aniline with p-phenetyl isothiocyanate, (4) b  - ethylmercapto - p - phenetidine (obtained by reacting acetyl-b -bromophenetidide with ethyl mercaptan and hydrolyzing) with p-phenetyl isothiocyanate, (5) p-amino-thiophenol propyl ether (obtained from p-acetylamino-thiophenol and n-propyl bromide followed by hydrolysis) and carbon disulphide, (6) p-aminothiophenol propyl ether with p-phenetyl isothiocyanate, (7) p-aminothiophenol isopropyl ether with p-phenetyl isothiocyanate, (8) p-aminothiophenol isoamyl ether with carbon disulphide, (9) p-aminothiophenol isoamyl ether with p-phenetyl isothiocyanate, (10) p-aminothiophenol isoamyl ether with p-butoxyphenyl isothiocyanate, (11) p-aminothiophenol ethyl ether with p-phenetyl isocyanate, (12) p-aminothiophenol ethyl ether with carbon disulphide, (13) p-aminothiophenol butyl ether with p-phenetyl isothiocyanate, (14) p-aminothiophenol butyl ether with carbon disulphide, (15) p-aminothiophenol n-amyl ether with phenetyl isothiocyanate, and (16) p-aminothiophenol n-amyl ether with carbon disulphide.
Patent GB-561134-A (GB)
Title: Improvements in locating and securing articles upon rods and tubular members
IPC: F16B17/00
Filed: 1942-12-21
Abstract: 561,134. Tube stoppers. AUTOMOTIVE PRODUCTS CO., Ltd., and BROCK, W. H. J. Dec. 21, 1942, No. 18152. [Class 99 (ii)] [Also in Groups XXII and XXVI] Articles are secured upon rods and tubular members by means of a conical flange formed on one of the parts that is deformed to engage a groove or recess in the other part. A piston 10, Fig. 1, is formed with a conical surface 20 and a groove 18 is turned producing a flange 17. The piston rod 24 has the end 15 turned a good fit for the part 13 of the bore in the piston and separated by a neck 22 from a part 16 of larger diameter. On assembly in a press under axial pressure, contact of the surfaces 20, 23 causes the flange to be pressed into a plane transverse to the axis closing up the groove 18 and causing the flange to enter the neck 22 securing the parts together, as shown in Fig. 2. If the parts 15, 16 be of the same diameter, a tubular press tool is required to effect assembly. In a modification, the groove 18 is turned in the end of the rod 16, Fig. 3, and axial pressure against the end 14 of the piston bore depresses the flange into the undercut groove 22. In a further form, the piston and rod have a screw-threaded engagement and final tightening on assembly deforms the connecting flange. As applied to fixing a cap 30, Fig. 7, on the end of a tube or cylinder 31, a flange 17 at the edge of the cap is deformed to engage a groove 22 in the tube and a resilient washer 32 is interposed between the ends of the cap and tube or between the flange and the side of the groove. The methods may be applied to parts of other than circular crosssection, such as square, and the deformable flanges may be somewhat curved or corrugated in radial section and need not be of constant thickness.
Patent GB-236740-A (GB)
Title: Improvements in lifting and lowering mechanism
IPC: B66C11/20
Filed: 1924-07-30
Abstract: 236,740. Norfolk, C., and Blundell, F. B. M. July 30, 1934. Overhead travellers and transporters.-Apparatus for transferring loads to and from ships, lighters, warehouses &c. comprises a hoisting rope g passing over a pulley f suspended from a trolly e which runs in and out along a pivoted boom a carried by a derrick or other support. The boom is supported at one end by a spring &c. in such a way that, under control of the operator, the weight of the load inclines the boom so that the load is transferred automatically towards or away from the derrick. As shown, the outer end of the boom a is supported by a rope d and the inner end is connected with a plunger b resting on a spring in a cylinder i and supported temporarily on a catch j. The trolly e is free to run between adjustable stops h on the boom. When a load is suspended from the trolly and hoisted to the required height, the operator releases the catch j, the weight of the load depresses the inner end of the boom, and the trolly runs inwards. When the load is detached, the boom rises automatically and is supported again by the catch for transferring loads outwards, the outer end of the boom is supported by a spring device or the equivalent in the rope d.
Patent GB-146296-A (GB)
Title: Apparatus for maturing and bleaching flour
IPC: A21D2/02
Filed: 1920-07-02
Abstract: 146,296. Industrial Appliance Co., (Assignees of Logan, J. I.). Aug. 3, 1914, [Convention date]. Bleaching flour; conditioning flour; treating flour with gases.-In maturing or bleaching flour by treating it with chlorine, nitrosyl chloride, or similar gas, the gas passes from a cylinder B through a stop valve M and pipe G fitted with pressure gauge J and filter I to two reducing valves H, H<1> arranged in series and separated by a stop valve M<2>. After leaving the second reducing valve, which is fitted with an indicator showing the quantity of gas passing, the gas flows through a small perforation in a platinum disk and thence proceeds by a pipe C to a chamber A where, mixed with air introduced by a pipe D, it acts upon the flour which is allowed to fall through the treating chamber. The reducing valves are constructed as shown in Fig. 5. The gas enters by the passage 45 and passes by a silver nozzle 43 into the main body space 51a, its passage from the nozzle being controlled by a platinum disk 40 secured on a filling piece 41 mounted in the movable member 33 of the valve. The member 33 is secured at one end to a diaphragm, consisting of a silver layer 32a and a copper layer 32, the position of which is controlled by an adjustable spring 36. At its other end it is secured to another diaphragm 46 which is perforated. The valve member is provided with a projection 48 extending through the diaphragm 46 and carrying a nut 52 which extends into a screw cap 51 secured on the main casing. Should the pressure of the issuing gas rise sufficiently high to cause the diaphragm 32 to move back against the pressure of the spring 36, the valve is closed until the pressure falls again. The first reducing valve brings down the fluctuating pressure of the gas issuing from the cylinder to an approximately stable pressure and the second valve ensures the gas being supplied to the small perforation in the platinum disk at the desired rate. The pressure gauge J indicates when a new cylinder of gas is necessary. The new cylinder is attached to a second connexion 28<1> so that the substitution can be made without stopping the apparatus. The stop-cocks M, Fig. 4, are arranged to have backlash to prevent sudden actuation. The reciprocating valve 76 is provided with a screwed spindle engaged by a screwed sleeve 78 on the hand-wheel 79. The sleeve 78 is provided with a flange 80 which bears against either a. washer over the packing 83 or the flange 81 in the filling screw 82, a slight amount of play being provided so that the sleeve moves up and down a little before the valve is actuated. The gas filter I, Fig. 7, comprises several wire screens 67 separated by distancepieces 68 and contained in a member provided with an enlarged hexagonal body portion 66 and oppositely threaded end portions so that it may be screwed into the gas pipe.
Patent GB-600283-A (GB)
Title: Improvements in or relating to shoulder pads
IPC: A41D27/26
Filed: 1945-07-17
Abstract: 600,283. Shoulder pads for garments. KURASH, M. July 17, 1945, No. 18264. Convention date, March 3. [Class 141] A shoulder pad is provided with an outer covering having an opening in the front thereof for the insertion of the pad and extensions at the rear face and outer end for permanent attachment to the shoulder and armhole seams of a garment. Two similar blanks having two straight sides at right angles and a curved hypotenuse are joined along their longer straight sides by an interrupted seam AD, CB, folded along this seam so that the right side of the material is outside, and then joined along the line MO, Fig. 4, the portion ALMO forming the shoulder seam extension. The covering is then folded to the form shown in Fig. 6 and stitched along the line RT, the portion RTGH forming the armhole extension, the edge GH folding inwardly over the face MHG to give a pouched effect, shown in Fig. 9, when the pad is inserted in the covering.
Patent GB-743286-A (GB)
Title: Improvements in gas control valves
IPC: G05D16/06
Filed: 1953-07-02
Abstract: 743,286. Fluid-actuated valves. BELL, C. V. June 28, 1954 [July 2, 1953], No. 18313/53. Class 135. A gas control valve for a pressure gas container comprises a circular body 5 having circular chambers 8, 9 on opposite sides of a central wall and closed by screw caps 6, 7 respectively, the wall having a radial inlet passage 11 leading to a transverse outlet nozzle 12 in one of the chambers and a radial passage 13 leading to a pressure gauge (not shown), a passage 16 through the wall connecting the chambers and connected to a relief valve 15 and a similar passage connected to a screw-valve controlled outlet and an outlet pressure gauge 17, the nozzle 12 being controlled by a valve 23 connected, by rods 20 passing through the wall to an adjustably spring-loaded diaphragm 25 in the other chamber. An outlet with a quickrelease valve may replace the valve 15 for flooding an oxygen tent, the valve 15 then controlling a port in the passage 11.