baber/WOPTO huggingface dataset:
Patent GB-1003835-A (GB)
Title: Improvements in or relating to condenser microphones
Inventor: CRAGG WILLIAM DONALD
IPC: H04R19/04
Filed: 1962-07-27
Abstract: 1,003,835. Electrostatic microphones. STANDARD TELEPHONES & CABLES Ltd. July 27, 1962, No. 28977/62. Heading H4J. In a capacitor microphone arrangement comprising two transducers responsive respectively to the pressure gradient and the pressure of an incident sound wave, the electrical outputs of the microphones are combined in such a way that the directionality of the arrangement varies with the frequency of the received sound. The pressure gradient transducer has a cardioid shaped directional pattern above a frequency of 50 c.p.s. and its response falls-off fairly rapidly below this frequency. The pressure transducer has an omni-directional pattern below 50 c.p.s. and its response falls off above 50 c.p.s. The combined response of the microphones is thus substantially level over a wide frequency range but the directional pattern varies over this range. The " cut-off " frequencies of the microphones may be obtained by varying their electrical or their acoustical characteristics. Thus in the former case they may be connected in parallel to a conventional amplifier (Figs. 1 and 2, not shown) and by adjusting the values of resistors and capacitors in parallel and series therewith the appropriate cut-off frequencies for each can be obtained. Alternatively the stiffness of the diaphragm of the pressure gradient type can be increased, thus raising the cut-off frequency and the reactance of the diaphragm and the cavity between the diaphragm and a fixed electrode of the pressure type together with the resistance of an acoustic resistance e.g. polyvinylchloride placed in the cavity can be varied to lower the cut-off frequency of the latter type. In the alternative case, the outputs are combined by placing the capacitor microphones in adjacent arms of a high-frequency (¢-10 Mc/s.) bridge circuit (Fig. 3, not shown). The polarizing potentials for the electrodes may be derived from the output of a transistorized high-frequency oscillator feeding the bridge circuit. A pressure gradient microphone G is mounted in the open end of a tube 6 and has its diaphragm exposed to the sound field on both sides by means of holes 8 provided in tube 6. The diaphragm 1 of a pressure microphone P is exposed to the sound field only via holes 8 although a small aperture may be provided in sealing member 5 whereby the sensitivity is decreased at very low frequencies. In Fig. 6 (not shown) an alternative form of tube for holding the microphones is depicted.
Patent GB-501078-A (GB)
Title: Improvements in or connected with folding hoods for motor and other vehicles
IPC: B60J7/12
Filed: 1937-10-23
Abstract: 501,078. Hoods for vehicles. SALMONS, G., and BALLS, A. H.DALBY. Oct. 23, 1937, Nos. 28996 and 31987. [Class 108 (i)] Helates to foldable hoods of the type in which a loose hood la secured at the rear end - to the rear hood 1 and rear cross-rail 3 and at its forward end to a loose front rail 9 engageable on the front pillars or windscreen frame is employed, and consists in the provision of hinged or rockable members 8 on a part of the frame so arranged that when in the raised position, the loose front rail can be temporarily engaged therewith, and by rocking the members downwards the rail 9 can be positioned with the loose hood taut. Cant rails 4 are hinged at the ends of the cross rail 3, their free ends being provided each with a slotted plate to engage a headed pin 6a when the cant rails are opened out. The side edges of the loose hood are provided with strainer wires 10 connected to a spring 11. The arms 8 are pivoted to the cant rails above the operative position of the wire, so that the tension of the wire tends to keep the rail 9 down. An incline 7c and stop pin 7b co-operate with web arm 8. Tapered ends of the arms are engaged in sockets in the rail 9 when the hood is to be closed. The loose rail is also positively held down by tapered wing nuts carried by the rail 9 engaging slots in plates secured to the windscreen frame. Midway between the rails 3, 9 the hood carries a hoop stick 22 having at each end a two part member 22a, 22b, the first part being hinged to the second and urged to operative position by a flat spring 24. A hook 24 near the end of the composite stick engages a rubber covered stop 26 on the cant rail. A modified hoop-stick is in one piece connected by inclined struts to the cant rails.
Patent GB-962427-A (GB)
Title: Improvements in climbing cranes
IPC: B66C23/28
Filed: 1960-08-23
Abstract: 962,427. Climbing tower cranes. F. W. SCHWING. Aug. 23, 1960 [April 28, 1960], No. 29064/60. Heading B8B. A climbing crane 6, Fig. 1, is raised by a pulley block system 16, 17, 18, connected to a support rope 12 at a point between a pair of pulleys 13, attached to the crane tower, around which the rope 12 passes as it extends between guiding support members 8. A pulley 14 provides the connection between ropes 12, 17. Alternatively, the rope 12 may be in two halves, the inner ends of which are attached to the ends of a beam pivoted to the pulley 16 at its mid point. As a further alternative a beam 28, Fig. 5, may carry two pulleys 14 round which two ropes 12 pass in a similar manner to that described with reference to Fig. 1. The pulleys 13 are mounted in a frame which detachably engages the bottom of the tower and can be lowered down the centre of the tower when the latter is extended by an additional section at the bottom. In addition to climbing up the floors 1, 2, 3, Fig. 1, of a building the tower may be raised within a sectional tower 35, Fig. 7. Additional sections 37 can be lifted to the top of the tower by the crane itself since the luffing jib has a trolley 38 which is moved in and out along the jib by ropes 39, 42 as the jib is raised and lowered, and the jib is pivoted at a point offset from the tower. Instead of the lifting rope 45 passing round a pulley 46 on the trolley as it passes down to the load hook it may pass directly thereto. Fig. 9 shows a level luffing arrangement in which the lifting rope 45 passes round a pulley 52 carried by a rope guide 51 which is pivoted on the tower at 51a and moved by an ancilliary rope and the winch 50 between positions 51 and 51<SP>1</SP> as the jib is luffed to produce level luffing. By the addition of a pulley half-way along the jib over which the lifting rope passes sections may be added to the top of the outer tower by this crane. The crane is assembled by erecting the tower 6, Fig. 6, and drawing up the jib by a rope 17 one end of which is attached to the tower at 33, the other end being wound on a drum 19. A pulley 16, round which the rope 17 passes, pulls down through a balancing pulley on a rope 12, opposite ends of which are attached to the jib at 35 and the top of the tower. Resilient inserts 26, Fig. 1, may be provided beneath supports 7, 10, 11.
Patent GB-662046-A (GB)
Title: Improvements in screens for absorbing secondary radiation in x-ray apparatus
IPC: G21K1/02
Filed: 1949-11-15
Abstract: 662,046. X-ray apparatus. DELHUMEAU, R. A. Nov. 15, 1949 [Nov. 25, 1948], No. 29260/49. Drawings to Specification. Class 98 (i). A grid for absorbing secondary radiation comprises a plate of a substance permeable to X-rays formed with fine and close grooves extending through part of its depth, filled with a substance impermeable to X-rays. The grooves may be parallel to each other, or may comprise two groups, grooves in each group being parallel and crossing the grooves of the other group. The grooves are cut or engraved in the plate, and may be directed towards the X-ray source by forming the grooves at progressively increasing inclination to the central groove or by bending the grooved plate. They are filled with thin sheets of lead foil, or with an X-ray absorbing liquid such as mercury or an amalgam of mercury with, e.g. silver. To fill the grooves with liquid, an auxiliary plate may be placed over the grooves, which are evacuated to draw the liquid into them. A second plate may be fixed to the grid to cover the grooves. The grooves may be so close and fine that when the grid is stationary during an exposure the pattern does not obscure the X-ray image, or the grid may be moved during exposure. When the grid has two groups of grooves and is to be moved, the grooves of both groups are formed at an angle to the direction of movement.
Patent GB-1166748-A (GB)
Title: Improvements in or relating to Material Handling Scrapers
IPC: E02F3/64
Filed: 1967-06-27
Abstract: 1,166,748. Earth-moving, bowl type scrapers. INTERNATIONAL HARVESTER CO. 27 June, 1967 [29 June, 1966], No. 29510/67. Heading E1F. The frame of a scraper elevator positioned at the mouth of the bowl of a bowl type scraper is supported at the top and bottom by members so engaging upper and lower guide means affixed to the side walls of the bowl that the frame may have a pivotal and linear movement with respect to the upper guide means and a movement haying both a horizontal and vertical components with respect to the lower guide means. A pivot pin 57 projecting horizontally from the upper part of each side of the frame 45 pivots in a block 58 slidable in a U channel 56 secured to the adjacent of the side walls 26 of the bowl to allow of the first specified movement. The second specified movement is obtained by rollers 54 on each side of the lower part of the frame engaging cam plates 59 on the side walls.
Patent GB-208620-A (GB)
Title: Improvements in and relating to caissons, coffer dams, platforms and the like
IPC: E02D19/04
Filed: 1922-10-28
Abstract: 208,620. Lynde, F. G., and Lynde, E. L. Oct. 28, 1922. Caissons and coffer-dams. - A caisson or coffer-dam for working on ground covered by deep water comprises a structure, preferably of reinforced concrete of cellular construction, adapted to float and to be sunken in position so as to rest on the ground with its top above the water, and having one or more vertical working chambers extending therethrough from top to bottom, and cylinders cr inner caissons located in the working chambers. The structure a is of ferro-concrete and is cellular to give buoyancy so that it may be floated into position. Openings c<1>, c<2> round the edge extend from top to bottom, and a firm foundation is made by dropping bags of concrete through the outer openings d and loose concrete through the inner openings e. A double-walled inner cylinder f is lowered into the working- chamber in the structure by means of a hydraulic ram or other tackle. Before it reaches the bottom, bags of concrete are dropped between the cylinder and the outer structure to form a watertight joint. Valves h are provided which are closed to ascertain if the foundation is watertight. When the lower end of the cylinder is sealed, the water is pumped out, and work on the bottom commenced. The structure may be left in position after the work has been completed, or the upper part may be made removable, and floated away.
Patent GB-295313-A (GB)
Abstract: 295,313. Soc. Civile pour l'Etude de la Photographie et de la CinÚmatographie en Couleurs. Aug. 9, 1927, [Convention date]. Three-colour systems.-In the reproduction by optical projection-printing of colour record images made on lenticular films, moire or watered effects in the copy, due to diffraction effects arising between the two lenticular films or between the source of light and the original film, are eliminated by employing as the projection system a punctiform or linear source of light A, a condenser B, the film C to be reproduced, an objective D identical with that used in the taking of the film C, a movable diaphragm d in this objective, and a second objective E of large aperture designed to project on a blank lenticular film F an image of the same size as the original on film C. The condenser B is so placed as to produce an image of the source of light A in the plane of the diaphragm d, the aperture of which is such as to pass only the central image of the light-source and to exclude lateral diffraction spectra. The source of light and the diaphragm are moved in unision as by operatively connected levers so as to sweep the whole pupil of the objective, or the. source of light remains stationary and its image is moved by means of mirrors or prisms so that it moves in unison with the diaphragm d. Images made on films of the multicolour line or grain screen type may be similarly reproduced on blank films of the same type, but in this case the image of the source of light and the diaphragm d remains stationary. The Specification as open to inspection under Sect. 91 (3) (a) states also that, in the reproduction of images on lenticular films, if the successive diffraction spectra in the plane of the diaphragm d have gaps between them coinciding in position with the centres of the juxtaposed colour filters in the. pupil of the picture-taking objective, a stationary force of light comprising three luminous points or lines is employed so spaced as to correspond with the centres of the colour filters of the picture-taking objective, and the diaphragm d is also stationary and has three holes or slots corresponding to the positions of the three central images of the three sources of light, and cutting out the lateral diffraction spectra from each source. This subject-matter does not appear in the Specification as accepted.
Patent GB-324034-A (GB)
Title: Improved filter device
IPC: B01D46/12
Filed: 1928-10-13
Abstract: 324,034. Schrempp, A. Oct. 13, 1928. Separators.-A filter for air, fluids, vapours, &c., comprises one or more superimposed sheets a with holes " stabbed '' therein to form perforations with projecting ragged rims which are arranged staggered. The sheets may be arranged inside various casings, Fig. 8 being for a motor car air intake, and Fig. 6 being side plates with a number of filter units therein.
Patent GB-188940-A (GB)
Title: A new or improved reclining chair
IPC: A47C17/16
Filed: 1921-11-07
Abstract: 188,940. Hussey, G. F. Nov. 7,1921. Seat adjustments; rests.-The pivoted back e of a chair is angularly adjusted by the movement of a slidable assembly comprising racks b, uprights c and a cross-bar d, each rack being held in adjusted position by the engagement therewith of a pin carried by a pivoted lever f, which may be pressed downwards by the spring f<3>, or may be held out of engagement by the leg f<4>. An extensible foot-rest g may be mounted on runners a<6>, and may comprise a rectangular frame, pivoted at g<2>, and which may be held in angularly adjusted position by the retractable catch members j. A slidably mounted foot stool m may be provided.
Patent GB-1517236-A (GB)
Title: Turns-counting dial
IPC: G06M1/16
Filed: 1976-07-16
Abstract: 1517236 Shaft position indicating dial A E TAYLOR 16 July 1976 [18 July 1975] 29670/76 Heading G4D A turns counting dial for a multiturn potentiometer or the like has a coupling ring 23 coupled, by a pin 21, the knob 16 and acting upon a mutilated gear 45 to advance a turns counting ring 50 one step for each revolution of the knob 16, the coupling ring having pins 25 which drive the short teeth 46A of the mutilated gear 45 and a convex annular portion 27 which engages with the alternate long teeth 26B of the gear to lock the counting ring 50 against movement between actuations.
Patent GB-285589-A (GB)
Title: Improvements in or relating to steam regulator valves and the like
IPC: F16K39/02
Filed: 1926-11-24
Abstract: 285,589. Mitchell, J., and Cossey, J. C. G. Nov. 24, 1926. Closure members.-A steam regulator valve for locomotives &c. comprises a series of concentric valves in which one or more of the valves or a portion thereof acts as a piston within another valve. The outer valve B has a depending cylindrical portion B<2> guided by a boss A<1> integral with the casing and provided with inclined outlet ports b'. The intermediate valve C seats on the valve B and is formed with a balancing piston having an inclined upper surface and slidable in the cylinder B<3>. When lifting the spindle E to open the valve pressure is first admitted beneath the piston under the control of a pilot valve D on the spindle, a continued movement brings an abutment F into engagement with the intermediate valve to open it, and a further movement brings a nut G into engagement with the outer valve. The abutment F has grooves f<1>, f<2> and the nut G a groove g<1> through which steam passes when the valve is open to scour the chamber B<3>. The lower part of the casing is inclined for a similar purpose.
Patent GB-1359737-A (GB)
Title: Electric control circuits
IPC: H02K29/12
Filed: 1971-06-25
Abstract: 1359737 Control of brushless motors MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 25 June 1971 [26 June 1970 (2)] 29934/71 Heading H2J [Also in Division G3] The current in a plurality of loads is controlled in accordance with a reference signal by a number of current amplifiers energized by selective switching independent of current gain. In the embodiment shown, a primary winding 7 of an electronically commutated motor is excited by an H.F. oscillator 75. A rotating member 8 couples magnetically with each of three windings 4, 5, 6 in turn. The outputs from these windings are rectified, 31-33, and filtered, 34-39, and then used to trigger switching transistors 21-23, which in turn actuate control transistors 11-13 connected in series with stator windings 1-3. The sum of currents through the stator windings produces a voltage across a resistor 61 which is compared by a transistor 42 with a reference voltage from a potentiometer 51-53. The output from transistor 42 controls the response of transistors 21-23 in such a way that the current through the windings 1-3 is maintained constant regardless of differences in gain between transistors 11- 13, and the torque of the motor is stabilized independently of motor speed.
Patent GB-465116-A (GB)
Title: Electric coupling device for tapping supply mains
IPC: H01R13/71
Filed: 1935-10-30
Abstract: 465,116. Plug couplings. STOTZ-KONTAKT GES. Oct. 30, 1935, No. 29954. Convention date, Nov. 1, 1934. [Class 38 (i)] Underground conductors are tapped at an outlet box by means of a stand-pipe p containing plug-pins t to enter sockets g mounted in a rotatable switching plate c disposed between the parts a, b of a casing sunk in the ground. After insertion the pipe is secured in position by means of a bayonet-fastening at o, r, the rotary movement of the pipe also serving through plate c to complete circuit at h to the sockets g. The plug-pins are connected by leads u with ordinary socket or terminal devices x disposed on the underside of the mushroom-like head w of the standpipe. When the pipe is removed the box may be covered by a plate adapted to be fastened by the bayonet-joint and to be locked against unauthorized removal. A current meter may be provided in the outlet-box or in the standpipe.
Patent GB-1118005-A (GB)
Title: Apparatus for embossing a pattern in the tread band of a pneumatic tyre
IPC: B29D30/06
Filed: 1965-07-15
Abstract: 1,118,005. Moulding tyres. PIRELLI S.p.A. 15 July, 1965 [4 Aug., 1964], No. 29980/65. Addition to 1,015,192. Heading B5A. The tyre mould of the parent Specification having axially opposed sections 5, 15 movable towards and away from each other and between which separate tread forming sectors 6 are radially movable, is provided with cavities 3, 17 in the opposed sections and a cavity 13 in a fixed frame 11 to which heated fluid, which may be at different temperatures, is fed via ducts 4, 18 and 14.
Patent GB-246769-A (GB)
Title: Improvements in or relating to gas-heated geysers
IPC: F24H1/12
Filed: 1924-10-22
Abstract: 246,769. Andrews, W. F., Tarper, A. H., and Hellyer, R. H. Oct. 22, 1924. Internally-fired boilers; geysers. - The feedtube 17 for supplying water, which may lead from the usual interlocking gas and water taps, extends through a heating space within the geyser and delivers into a funnel 12 in the upper part of the casing, the arrangement providing a pre-heater for the water and also a sight feed. Specification 246,547 is referred to.
Patent GB-536536-A (GB)
Title: Improvements in or relating to manually operable rotary sleeve valve mechanisms and to means for mounting such valve mechanisms in operative position
IPC: F16K11/083
Filed: 1939-11-16
Abstract: 536,536. Valves. BRITISH OXYGEN CO., Ltd., and JONES, W. Nov. 16, 1939, No. 30185. [Class 135] A plug cock particularly adapted for regulating the relative proportions of gases and vapours in apparatus for the administration of inhalents and comprising a hollow forked plug working in a ported liner has means for imparting a uniform circumferential axial thrust to the plug to adjust the relative positions of the plug and liner. In the form shown in Fig. 1, the liner 12 has two pairs of diametrically opposed ports 13, 14 and 15, 16 and is enclosed in a casing 10 of synthetic resin such as that sold under the Registered Trade Mark "Bakelite" having an internally threaded boss 11 for securing the casing to the neck of a receptacle for anaesthetic or other liquid. The casing has two passages 17 18, mating with the ports 13, 15 fitted with dip pipes extending into the receptacle and two passages 19, 20 mating with the ports 14, 16 leading to a byepass passage closed by a cover 22. The hollow plug has two ports 27, 29 of greater longitudinal length than the ports 13, 15 arranged on either side of a partition 25. The port 27 is adapted to connect either or both of the ports 13, 14. with the inlet 12 while the port 29 is adapted to connect either or both of the ports 15, 16 with the outlet 23. The position of the plug is adjusted by two screwed rings 30, 31 secured by locking rings 32, 33 the ring 30 being screwed into the liner to engage the larger end of the plug while the ring 31 screws into the casing to engage the smaller end of the plug. The plug is turned by a handle 36 passing through a slot in the liner and in a fitting 26 mounted on the liner and carrying an indicating scale 37. The fitting 26 is secured in position by the boss of a grease cap 34 screwed through the fitting into a recess in the liner.
Patent GB-839329-A (GB)
Title: Improvements relating to die-sets
IPC: B21D37/10
Filed: 1956-10-04
Abstract: 839,329. Sub-press mechanisms ; toolholders. COLEY BROS. (TOOLS) Ltd., and COLEY, S. E. Oct. 4, 1957 [Oct. 4, 1956; Nov. 27, 1956], Nos. 30235/56 and 36206/56. Class 83 (4). A die set comprises a top plate 10 and a bottom plate or base 11 adapted respectively to receive a punch and die or other co-operating upper and lower tools, means for securing one of the tools to its associated plate consisting of a block 28 for engaging one side edge of the, e.g. lower tool 24, said block being adjustable by screw means 30 in a direction transverse to this side edge and adapted to be clamped to the plate 11 in any desired position of adjustment, and a wedge block or strip 29 adapted to engage both the opposite side edge of the tool and a fixed block 39 on the plate; release of the wedge block-'or strip thus permitting the adjustment of the tool in a direction parallel to its side' edges, and means for locating the other tool 14'in or on its associated clamping plate 15 so as to permit of its adjustment in a direction substantially at right angles to the said side edges of the one tool. The upper clamping plate 15 is adjustably secured to the-top plate 10 by clamping strips 16 which engage the edges of the plate. The securing bolts 17' for the-strip are spring-loaded. Alternatively, the upper tool is secured by a wedge block 22 (Fig. 3), which engages one of the inclined edges of the clamping plate 20. The lower tool 24 is fitted with a stripper plate 25 and stock guides 26. The wedge block 29 is secured by recessed spring-loaded cap screws 37.