baber/WOPTO huggingface dataset:
Patent GB-767997-A (GB)
Title: Improvements in or relating to differential electronic amplifiers
IPC: H03F3/28
Filed: 1954-08-20
Abstract: 767,997. Automatic current control systems. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Aug. 20, 1954 [Aug. 24, 1953; Jan. 25, 1954], No. 24298/54. Class 38 (4). [Also in Groups XL (b) and XL (c)] In a push-pull amplifier (see Group XL (c)) comprising a pair of pentodes having a common cathode impedance of high value, discrimination-against in-phase voltages is increased by holding the screen-grids at a potential which is fixed relative to that of the cathodes. The common cathode impedance may comprise a pentode valve with a cathode resistor 16, Fig. 4, of relatively high value, the grid and screen-grid being supplied with positive potentials, via resistors 25, 25 respectively, which are stabilized by gas-discharge tubes 18, 19. In another embodiment the common cathode impedance comprises a pair of series-connected triodes 20, 21, Fig. 5, in series with a bias resistor 16, the grid potentials of which are stabilized by connection to a potentiometer across the H.T. supply comprising resistor 24 and gas-discharge tubes 22, 23, The screen-grids may be fed through a constantcurrent device comprising a pair of resistors 28, 29, Fig. 6, the screen-grids being also connected to a cathode-follower 26, the cathode of which is coupled to the join of resistors 28, 29 via a gasdischarge tube 27. In this device the cathode impedance of the valve 26 may comprise a cathode-degenerated triode, Fig. 7 (not shown). In a further modification a seocnd cathodefollower 32, Fig. 8, is provided with its grid connected to a gas-discharge tube 33 in the screengrid supply circuit. In another embodiment of the invention the screen-grids are fed through a constant-current device comprising a radiationcontrolled rectifier 37, Fig. 9. A gas-discharge tube 15 is connected between screen-grids and cathodes, while the common cathode impedance comprises a transistor 35 with its base electrode supplied with a substantially constant current via a series resistor 36.
Patent GB-981406-A (GB)
Title: Steerable undercarriage assemblies
Inventor: DOWTY SIR GEORGE HERBERT
IPC: B64C25/50
Filed: 1961-07-06
Abstract: 981,406. Steering aircraft groundwheels. DOWTY TECHNICAL DEVELOPMENTS Ltd. June 27, 1962 [July 6, 1961], No. 24419/61. Heading B7H.  A steerable aircraft groundwheel assembly includes a leg within which is mounted a fluid pressure actuator capable of producing linear movement in a direction parallel to the longitudinal axis of the leg and means to convert that linear movement into rotary movement about the axis of the leg. As shown in Fig. 1, a tubular leg member 1 has rotatably mounted therein a turning tube 2 which carries a nosewheel by means of a lever, a shock-absorber 3 being interposed between the lever and a support 4 in the turning tube 2. A cylinder 6 is secured in the tube 1 and houses a piston 9, the rod 10 of which extends to a mounting 24 for a pair of connecting rods 21 and 22 which are connected eccentrically to a pair of wheels 17 and 18 secured to bevel wheels 15 and 16, respectively, and mounted on shafts 13 and 14 carried by a housing 11 secured to the cylinder 6. The bevels 15 and 16 engage with a bevel 15 which has a splined connection with the tube 2, so that the linear movement of the piston 9 is converted into rotary movement of the leg member 2. The supply of fluid to one side or other of the piston 9 is through a conventional control valve with follow-up motion, and having a by-pass position to permit free castoring. In a modification, Figs. 3 and 4, a cylinder 42 is free to slide upon guides 47 within the tube 1 and surrounds a fixed piston 41, upon an extension of which are mounted bevels 52 and 53 co-operating with a bevel 56 having a splined portion 59 for connection with the rotary tube 2, the bevels 52 and 53 being operated by connecting rods 48 and 49 eccentrically connected to the bevels and pivoted to the movable cylinder. The gear ratios are such that a complete revolution of the tube 2 is made for less than the full stroke of the piston or cylinder.
Patent GB-962467-A (GB)
Title: Improvements in or relating to skewer supporting means for textile bobbins
IPC: D01H1/18
Filed: 1961-07-06
Abstract: 962,467. Creels. R. H.BOULIGNY Inc. July 6, 1961 [July 6,1960], No. 24499/61. Heading D1J. A bracket for hanging a bobbin in a creel comprises upper and lower members 22, 24, Fig. 2 connected by a C-member 26, the lower member having a recess 30 for positioning a bobbin-skewer, and the upper member having an aperture 38 to receive the skewer, and means, which may comprise arms 44, Fig. 7 with bolt-slots 46, whereby the bracket is hung in the creel support. The arms 44 are on raised flanges and the central portion in which the aperture is situated has shoulders 42 shaped to guide the skewer into the aperture. The aperture is formed as a short sleeve and may have an insert of plastic &c. The recess of the lower member has similar guide-shoulders and may have an insert. The upper and lower members have a shank such as 36 to which the C-member may be welded. The creel-frame, Fig. 1 comprises a post 10 mounted at 12 with arms 14 provided where shown with slotted stringers 16 to which the arms 44 are bolted.
Patent GB-915360-A (GB)
Title: Improvements in water tube boilers
IPC: F22B21/34
Filed: 1961-07-07
Abstract: 915,360. Water - tube steam boilers. VORKAUF, H. July 7, 1961 [Sept. 21, 1960], No. 24604/61. Addition to 889,994. Class 123 (2). The water-tube boiler described in the parent Specification is modified in that the convection heated U-shaped tube coils proceed from and return to the tubes which shield the tube coils from radiation from the combustion chamber. As shown, the boiler consists of a tubular framework for supporting the heating surfaces consisting of downcomer tubes 1, return tubes 2, longitudinal and transverse distributing headers 4 and 5, 5<SP>1</SP> and collecting headers 6 and 7, 71. The steam drum 8 is supported on the downcomer tubes 1. The heating surface tubes 9 at the front wall and roof, the tubes 10 at the side walls and the tubes 11, 11<SP>1</SP> at the rear wall enclose a combustion chamber 12 downstream of which is a flue 13 in which is disposed further evaporator surfaces 14 and economizers 15. According to the invention the heating surfaces 14 consist of vertical platens of nested U-tubes, the tubes of each platen branching from and returning to one of the rear wall tubes 11<SP>1</SP>, these tubes which may carry a layer 26 of refractory material shielding the platens from furnace radiation. In a modification, Fig. 2, (not shown), the platens 14 are interdigitated with similar platens connected to tubes lining the rear wall of the pass 13. In a further modification, Figs. 3 to 5, (not shown), the rear passi s divided into upper and lower horizontal passes, the platens being located in the former. In further modifications the shielding tubes form the floor of a lateral pass, Figs. 6 and 7, (not shown), or screen an up-pass from the combustion chamber, Fig. 8, (not shown), in which the platens are located.
Patent GB-1056536-A (GB)
Title: Improvements in or relating to control devices for drawing rolls in glass drawing machines
IPC: C03B15/02
Filed: 1963-06-20
Abstract: <PICT:1056536/C1/1> A device for controlling the position of a drawing roller in a glass drawing machine comprises power actuating means normally tending to move the roller away from a sheet of glass which is being drawn and capable of causing the roller to close on to the sheet of glass, a cam follower locking mechanism which maintains the roller normally in a predetermined position intermediate the closed and open positions and a release means, which, in response to a force, such as a stone, tending to open the roller to a predetermined degree beyond the intermediate position, releases the locking mechanism to allow the roller to move to the open position. The glass is drawn from a pot by rollers 20, 22 mounted on shafts 32, 34 connected by lever systems to shafts 56, 82 respectively.  The shaft 82 carries an arm 90 engaging a block 92 adjustable on a screw-threaded rod 94 to enable the position of the roller 22 to be fixed.  The shaft 56 has an arm 106 freely mounted and an arm 108 fixed thereon.  The arm 106 is movable under the action of a piston 114 and its movement is communicated by way of a lost-motion connection to the arm 108 and thus to the roller 20, The initial position of the arm 106 is set by means of a block 174 adjustable by means of a screw 166, the block being formed with a projection engaged by a follower 154 on the arm. In normal use, the piston 114 is moved upwardly to hold arms 106 and 108 so that the roller 20 is away from the glass sheet in an intermediate, adjustable position. If a malfunction develops during operation, the piston, under the control of a sensing device such as described in Specification 1,052,493 is lowered so moving the roller 20 towards the roller 22 so as positively to feed the glass until the malfunction is cleared, when the piston is raised to normal position.  If a stone occurs in the glass, the roller 20 is forced to one side, thus rotating the arm 108, tilting the link 130 to cause the wheel 132 to rock the block 174 and release the follower 154 and enable the arm 106 to rotate to cut off the power to piston 114, roller 20 then moving against the sheet by its own weight. To reset the parts when the stone has passed, the switch to the power is manually operated. The rollers 20, 22 can be manually operated so that there is a substantial distance between them while the bail is raised to start the drawing of the glass sheet.
Patent GB-1026817-A (GB)
Title: Process of forming pyrographite
Inventor: SMITH ALLEN HORTON
IPC: C04B41/50
Filed: 1964-06-15
Abstract: A pyrographite coating is formed on a substrate at atmospheric pressure by heating the substrate in an enclosed chamber to 2000 DEG C., and passing over it a mixture comprising methane, propane, acetylene, ethylene or benzene mixed with argon, nitrogen or hydrogen. It is preferred that twenty-five to thirty parts of argon should be used per part of methane.  The process may be carried out in a quartz bell jar 1 supported on a heat-resistant base 3.  Heating coils 5 are supported inside the jar by conduits 7 extending through orifices in the bottom of the jar and leading to a source of R.F. power.  A crucible 13 centred within the coils 5 is supported on a tripod 15 of refractory material.  The gas mixture is led in through a conduit 17.  In carrying out the process, argon is passed into the jar to flush out oxygen and then the power source is activated to raise the temperature of the crucible to 2000 DEG  C.  Methane in gradually increasing amounts is mixed with the argon until the optimum quantity is reached.  The orifices in the bell jar are packed with silicon rubber seals 29 and excessive heating of the seals is prevented by quartz wool loosely packed at the bottom of the apparatus.
Patent GB-1535187-A (GB)
Title: Brakes
IPC: B61H5/00
Filed: 1975-06-09
Abstract: 1535187 Brakes GIRLING Ltd 8 June 1976 [9 June 1975] 24697/75 Heading F2E A housing 8 is moved longitudinally to apply thrust, via a screw 15 and a complementarily threaded thrust member 16, to an elongated body 10 of friction material, the thrust member being permitted to rock under braking and reaction forces into contact with the housing as shown in Fig. 4. The thrust member may simultaneously force the screw into contact with the opposite wall of the housing, as shown. The housing is of flattened tube-like form (Fig. 2, not shown). Screw 15 and member 16 are relatively rotated to adjust the body 10 relative to the housing for wear compensation. The body 10 may act on wheel side surfaces as shown or on a wheel tread or drum exterior.
Patent GB-1212993-A (GB)
Title: Rotary hammer mill
Inventor: MACMASTER KENNETH JOHN GEORGE
IPC: B02C13/28
Filed: 1967-05-26
Abstract: 1,212,993. Hammer mills. FRANCIS & JOHN S. LANE Ltd. 27 May, 1968 [26 May, 1967], No. 24756/67. Heading B2A. A hammer tip for a hammer mill comprises an open top box structure having side walls W and rectangular end walls E, and on one or two opposite walls E, E Fig. 2, a cutting edge C formed by a metal surface extending at an angle α not less than 150‹ or substantially more than 165‹ to the plane of the respective end wall. A part A is fluted to provide a series of edges or teeth 13, Fig. 1. A hammer arm (not shown) comprises a pair of clawed arms placed back-to-back in a central opening O, the tip being secured by claws locating in hollowed side walls W and by a bolt and cotter pin.
Patent GB-224675-A (GB)
Title: Improvements in rotary duplicating apparatus
IPC: B41L13/04
Filed: 1923-10-04
Abstract: 224,675. Bessat, A., and Lievens, L. L. Oct. 4, 1923. Addition to 196,567. Stencilling; tripping- arrangements; set-off, preventing.-In the apparatus described in the parent Specification, the second printing-cylinder 2 is adapted to occupy either an upper position, as shown in dotted lines in Fig. 1, or a lower position, so that the sheets may be printed either in different colours on the same side, or on both sides. The pressure-rollers 37, 40 of the two printing-cylinders 1, 2 are held against the cylinders by levers 35, 38 and springs 36, 39, the levers being depressed by rollers 46, 53 to permit the entry of the sheets between the cylinders and rollers. Cams 32 operated by a handle 34 regulate the distance of the roller 37 from the cylinder 1. The spring 39, that controls the lever 38, is attached to a reversible arm 41, so that the spring may act on either side of the lever, and holds the pressure-roller 40 against or away from the cylinder 2 in either position of the cylinder. To enable the impressions of the two cylinders to be brought into register, each cylinder 2 is connected to its driving pinion by means of a screw 55, Fig. 5, passing through a slot 59 in a disc 58 attached to the cylinder. The impression of the cylinder 1 is dried by a blotting- roller 50 co-operating with a driving-roller 49. A second blotting-device, comprising a blotting- roller 62, Fig. 4, and a driving-roller 61, is detachably mounted behind the printing-cylinder 2. The rollers 62, 61 are reversibly mounted in an oscillating plate, so as to adapt the device to the different positions of the cylinder. Each blotting- roller is detachably mounted on its spindle between a flange 78, having a pin 79, and a screw collar 80. The blotting-paper is secured on the roller by means of a blade 84, Fig. 8, which enters a slot in the roller and is held down by spring-controlled hooks 85.
Patent GB-1490625-A (GB)
Title: Method for producing a high-impact polystyrene compositio
IPC: C08F279/02
Filed: 1975-06-10
Abstract: 1490625 High impact styrene polymers ASAHI KASEI KOGYO KK 10 June 1975 [12 June 1974] 24816/75 Heading C3P and C3G A method for producing a high-impact styrene polymer comprises polymerizing a mixture of: (1) 2-20% by weight, based on the mixture, of a solution-polymerized random copolymer of 1,3-butadiene or a mixture thereof with a conjugated diolefin other than 1,3- butadiene in an amount of 50% by weight or less based on the total weight of the combination, and styrene, or a combination thereof with a mono-ethylenically unsaturated aromatic hydrocarbon other than styrene which is copolymerizable with styrene in an amount of 50% by weight or less based on the total weight of the combination, in the presence of a lithiumbased catalyst, and having a content of said styrene or combination thereof continuously and gradually reduced or "tapered" along the polymer chain, wherein the content of said styrene or combination thereof in said random copolymer is 3-10% by weight, the content of said 1,3-butadiene or combination thereof is 90-97% by weight, among the modes of linkage in the portion of said butadiene or combination thereof, 1,2-vinyl linkage is 20% or less by weight; the content of the block of said styrene or combination thereof is 20% or less by weight of the total content of said styrene or combination thereof; and when the polymer chain (A-B) is divided into two equal molecular weight portions A and B, portion A has a content of said styrene or combination thereof of 1À5-2 times the average content of said styrene or combination thereof in the total copolymer and portion B has a content of said styrene or combination thereof of ¢ or less if the average content of said styrene or combination thereof in the total copolymer, and (2) 80-98% by weight, based on the mixture, of styrene or combination thereof with a monomer other than styrene which is copolymerizable with styrene, in an amount of 50% by weight or less based on the total weight of the combination, said polymerization being carried out by bulk polymerization or bulk polymerization followed by suspension polymerization. The lithium based catalyst may be propyllithium, n-butyllithium, secondary-butyllithium, amyllithium, dilithiobutane, naphthyllithium and 1,4 - dilithiobenzene. In the specific examples use is made as (l) of "tapered" SBR copolymers in which (a) the styrene content is 8À0, 8À1 or 8À1%; (b) the sytrene content in a half of polymer chain is 14À1, 14À9 or 2À2%; (c) the styrene content in the other half of the polymer is 1À0, 1À2 or 13À8%; (d) the block styrene content is 0À3, 1À0 or 1À1%; and (e) the 1,2-vinyl content is 13À0, 12À5 or 13À5%.
Patent GB-1330115-A (GB)
Title: Self-advancing mine roof support
IPC: E21D23/00
Filed: 1971-04-19
Abstract: 1330115 Advancing mine roof supports GULLICK DOBSON Ltd 19 April 1971 [18 April 1970] 24836/71 Heading E1P An advancing mine roof support assembly has the adjacent frames 1 interconnected by a rope or chain 4 acted upon by a jack 9, 10 to position said one frame relative to the other; the member 4 passing about a guide 6 arranged above the centre of gravity of the support in all its operating conditions. The member 4 is anchored to the frames at 5, 8 and passes through a guide 6 and about a pulley 7 which is mounted on the piston rod. In a modification, Fig. 2 (not shown), the member 4 is attached to the piston rod and passes about a pulley mounted on a bracket. The units 6-10, may be fixed on the base plates or on the underside of the roof comprises, see Figs. 3 and 4 (not shown). The jack may have a pressure fluid supply controlled by deviations of a support from a desired position and/or the inclination of its prop means.
Patent GB-229972-A (GB)
Title: Heel plates for boots and shoes of all kinds
IPC: A43B21/37
Filed: 1924-10-20
Abstract: 229,972. Rodlin, S. A. July 5, 1924, [Convention date]. Protectors, securing. -In heel protectors of the kind secured to the heel proper by two inter-engaging metal plates, the plate 10 which is secured to the heel is formed with openings 1, 2, 3 the sides of which are inclined to the plane of the plate, and the plate 11 to which the tread issecured by tangs 7 is provided with perpendicular lugs 4, 5, 6. When the plates are forced together, as by hammer blows, the lugs are bent to conform to the shape of the openings, holding the plates together without other locking means. A tool may be inserted in a notch 8 to force the plates apart, as for renewal of the tread.
Patent GB-255276-A (GB)
Title: Improvements in and relating to lenses or windows for goggles
IPC: A61F9/02
Filed: 1925-10-06
Abstract: 255,276. Hart, H. R. Oct. 6, 1925. Spectacle lenses.-Lenses or windows for goggles of the kind comprising laminae of glass with an interposed lamina of unbreakable material such as mica or celluloid have all the engaging surfaces of the laminµ of substantially the same area so that the edges lie in planes perpendicular to a tangential plane at the principal axis. The lenses may be curved as shown, and may be of different curvatures in planes at right angles.
Patent GB-702239-A (GB)
Title: Improvements relating to wrapping machines
IPC: B65B11/54
Filed: 1951-10-25
Abstract: 702,239. Endless conveyers. BRECKNELL, MUNRO & ROGERS, Ltd., and DOLMAN, H. J. Oct. 25, 1951, No. 24957/51. Addition to 674,942. Class 78 (1) [Also in Groups XVI, XVII and XXIV] Endless conveyer means for pushing a stack of articles through a wrapping machine, [Group XVII], includes two spaced parallel chains 117 arranged on either side of a slideway 111 and having transversely connecting carrier bars 119, to each of which is hinged a pusher 120 normally spring-urged into a position at rightangles to the bar 119. A trailing rod 240 also carried by the bar 119 is adapted to hold down the lower rear extension of a wrapper around the stack during part of the wrapping operation. The conveyer is given alternately a long forward movement and a short backward movement, to enable the wrapping to be effected completely, by back-stepping mechanism driven from a main shaft 135 which is clutched in for one revolution each time a stack is fed to the machine. The back-stepping mechanism includes, Figs. 9, 10, 11c, two ratchet wheels 127, 128 keyed to a spindle 122 in driving connection with the conveyer chains. The wheel 127 is formed with pairs of oppositely directed notches 125, 125A and 126, 126A adapted to be engaged by pawls 123, 124 respectively, pivotally carried by an arm 121 oscillated about the spindle 122 by a link 151 operated by a cam 146 on the shaft 135. The wheel 128 has notches 129, 129A adapted to co-operate with a pawl 130 pivotally carried by a disc 131 loosely mounted on the shaft 122 and driven by gearing from the shaft 135. Cam blocks 154, 155 on a slide 153 vertically reciprocated by a cam 147 on the shaft 135 engage the pawls 123, 130 at suitable times so that the pawl 130, taking over from the pawl 124, first gives a long movement in one direction, the pawl 123 being held by a cam, is then disengaged by a cam and the pawl 123 allowed to give a short reverse movement.
Patent GB-315612-A (GB)
Title: Improvements in or relating to the mounting of mirrors upon dressing tables
IPC: A47G1/04
Filed: 1928-08-31
Abstract: 315,612. Fielding, W. Aug. 31, 1928. Looking - glasses and mirrors.-The side mirrors of dressing tables are mounted on articulated arms 3, 4 on the side support 2 of the central mirror 1, the hinges 5 being centrally situated on the back of the mirrors 6. The bottom edge of the mirror is fitted with a strip of baize or the like. The inner arms S may be provided with shelves 9 for trinkets, &c.
Patent GB-719557-A (GB)
Title: Improvements in vehicle wheels
IPC: B60B3/00
Filed: 1951-10-26
Abstract: 719,557. Vehicle wheels. DUNLOP RUBBER CO., Ltd., and BUTLER, H. J. Sept. 8, 1952 [Oct. 26, 1951], No. 25042/51. Addition to 647,332. Class 144(2) The wheel of the parent Specification having a detachable tyreretaining flange 7 formed by separate arcuate segments 5 detachably secured together, as by bolts 9 through lug pairs 8, and provided with axially spaced circumferential splines fitting in grooves in the wheel rim is made with three or more arcuate segments 5 each having only one spline 10, the splines being received in a single circumferential groove 4 in the wheel rim 1. To prevent circumferential creep, a key 11 is fitted to engage registering slots 12, 14 in one of the arcuate segments and the rim-base respectively. The radius of the arcuate segments is made slightly less than the radius of the wheel rim so as to eliminate play.