baber/WOPTO huggingface dataset:
Patent GB-1100124-A (GB)
Title: Semiconductor devices and methods for producing the same
IPC: H01L21/3105
Filed: 1965-02-12
Abstract: 1,100,124. Semi-conductor devices. HITACHI SEISAKUSHO KABUSHIKI KAISHA. 12 Feb., 1965 [13 Feb., 1964], No. 6162/65. Heading HlK, A semi-conductor device comprises a semiconductor body with a surface lying in a crystallographic plane other than a 111 plane and an oxide layer formed thereon in which the surface carrier concentration in the surface underlying the oxide has been reduced by heating while a voltage was applied between the oxide and the body. The device may be a planar transistor or MOS diode, but in the embodiment is an MOS field effect transistor, formed from a 4 ohm. cm. P-type silicon wafer. The oxide layer is formed to a thickness of 1500 A by heating at 1000 C. for 20 minutes in a steam-containing atmosphere. Elongated N-type contact zones 5, Fig. 2, are then formed and aluminium electrode 13 vapour deposited over the intervening part of the N-type surface channel underlying the oxide. Finally, the surface donor density in the channel is reduced by heating at 350 C., for example, for 2 hours with a potential of 5 volts applied across the oxide layer.
Patent GB-1496632-A (GB)
Title: Yarn feeding devices for knitting machines
IPC: D04B15/48
Filed: 1976-02-17
Abstract: 1496632 Knitting machines SCORPIO INDUSTRIES INC 17 Feb 1976 [12 May 1975] 06168/76 Heading D1C Positive yarn feeding devices for a multifeed circular knitting machine comprises a common tape 22 in driving engagement with a plurality of rollers 21 associated with   respective yarns 17, the tape width being less than the axial length of the rollers so that each yarn is displaceable between a feeding position in which it is engaged between the tape and the associated roller and a non- feeding. position as shown in which it is disengaged from the tape, such displacement being effected by a bracket 32 having eyelets as 36 for guiding the yarn round the roller, the bracket being mounted for limited pivotal movement between the two positions, a counterbalance weight 40 mounted by an element 37 on the bracket urging the latter to pivot to the non-feeding position while tension in the yarn exceeding a preselected value indicative of the yarn being required for knitting by the machine serves to pivot the bracket to the yarn feeding position. A second weight 42 opposes the weight 40, the positions of the weights being adjustable by holes 39 or a slot 41 to determine the preselected yarn tension. Such tension actuates the bracket 32 by way of an eyelet 44 on element 37. The feeding device is particularly suitable where a plurality of yarns are fed to a striping box at each feed of the machine, each yarn then being required only intermittently for knitting
Patent GB-469567-A (GB)
Title: Improvements relating to the handling of pitch and like substances
IPC: C10C3/16
Filed: 1936-02-29
Abstract: 469,567. Casting pitch &c. SOWDEN, W., and CLAYTON, SON, & CO., Ltd. Feb. 29, 1936, No. 6173. [Class 87 (ii)] [Also in Group XIII] A method of handling pitch and like distillation products such as bitumen or resin, consists in delivering the molten substance in a thin layer e on to a horizontal rotating cylinder a which is partially immersed in a cooling liquid c, and removing the cooled layer f from the cylinder by a scraper d.
Patent GB-778366-A (GB)
Title: Improvements in or relating to presses
IPC: B23K37/04
Filed: 1955-03-02
Abstract: 778,366. Mechanical presses. BLISS CO., E. W. March 2, 1955 [April 13, 1954], No. 6186/55. Class 87(2). [Also in Group XXII] A press comprises side members 12, 18 having secured thereto a bolster 31, and a platen 22 slidable between the side members and moved towards the bolster by links 68, 74 actuated by cam means 80 which provide a positive dwell in the cycle of movement of the platen. In one embodiment an upstroke press, particularly for holding workpieces together during welding, has a star-shaped platen 22 slidably guided in side frames 10, Fig. 1 (not shown), and operated on its upward working stroke towards a bolster 31 carried by the crown 52 of the press, by a cam mechanism 78, 80 which provides a period of dwell of approximately 120 degrees of cam rotation at the end of the working stroke. The cam discs 78, 80 are spaced apart on a camshaft 76 and on each of their opposed inner surfaces are cam grooves 108, Fig. 3, into which are engaged a follower 114 carried by a reciprocating shuttle beam 82 disposed between the cam discs and having a slot 116 engaging over the camshaft 76. Each end of the shuttle beam 82 is slidable along an adjustable taper block 94, 98 respectively, and has rack teeth 90, 92 respectively in engagement with pinions 56, 58 mounted on rock shafts 44, 46. At the ends of each rock shaft are mounted rock arms 60, 62 connected by links 68, 72 to brackets 38 mounted on the corners of the platen 22. As the cam rotates the shuttle beam 82 is reciprocated thereby causing the pinions to be rotated and thus. to alternately raise and lower the platen whilst maintaining a period of dwell at the end of the upstroke. Air cylinders 32 disposed one at each corner of the platen, have piston rods 42 connected to the brackets 38. The air cylinders are supplied with pressure air from a receiver 158, Fig. 9 (not shown) mounted on the crown of the press, the supply of air being controlled by valves operated in timed sequence with the rotation of the cam mechanism. The cam mechanism is driven by an electric motor 120, Fig. 9 (not shown), which drives through Vee belts a flywheel 126, Fig. 6, mounted on a shaft 128 carrying a pinion 142 in mesh with a gear 144 rigidly, connected to gears 148, 150 in mesh with gear teeth 152, 154 respectively on the cam discs. A combined clutch and brake unit 156 is provided for alternately clutching the flywheel 126 with the shaft 128, and for braking the shaft. An additional brake shoe 157 is used for stopping the flywheel when necessary. In an alternative embodiment a pair of shuttle beams operated by separate cam discs may be used, these shuttle beams driving pinions mounted on the ends of the rock shafts 44 ; the rock arms may then be placed in the centre of the rock shafts. The press may alternatively have its platen moved downwardly towards a bolster disposed on the press base. The driving mechanism for the bolster being then mounted in the base instead of in the crown.
Patent GB-209328-A (GB)
Title: Sewing machine attachment
IPC: D05B29/06
Filed: 1923-03-05
Abstract: 209,328. Singer Manufacturing Co., Ltd., Corrall, H., and Heggie, J. March 5,1923. Presser-feet; presser. bars with periodic control.-An attachment to the presser-bar of a sewing-machine in place of the ordinary presser-foot comprises a socket 1 clamped to the bar by a screw 2 and carrying two yoke-shaped links 3, 4 pivoted to a shank 7 supporting a bent wire darning-foot 13. The foot is pressed downwards by springs 10 attached to the pivots 6, 8 of the links and is raised on each needle stroke by the engagement of a hook-shaped projection 12 by the needle-clamp or other member on the needle bar.
Patent GB-567800-A (GB)
Title: Improvements in and relating to moulds for use in dentistry and in similar moulding processes
IPC: A61C13/16
Filed: 1943-04-20
Abstract: 567,800. Flasks; moulding-processes. DIXON, G. April 20, 1943, No. 6326. [Class 83 (i)] [Also in Groups V and VI] A dental &c. flask having complemental portions is provided with cavities into which fit removable insets in which the dentures or other articles can be moulded ; after moulding, the insets are removed, with the dentures &c. thereinside, and heated. Fig. 1 shows a flask having halves b<1>, b<2>, in which fit insets a<1>. As used in dental work, a wax model is invested in plaster in one inset a<1>, separating medium is applied to the face of the plaster, the inset is inserted into the lower flask part b<2>, the other (empty) inset a<1> is placed in the upper flask part b the flask is closed, and plaster is poured into the upper inset through a hole b<4> to form the reverse impression of the model including a sprue which projects through the opening b4. The flask is then opened, the insets with their plaster investments are taken out, the wax is melted and washed out, the insets are replaced in the flask, and the molten metal is poured in. The flask is re-opened, and the insets are removed and clamped between two plates h', h<2>, Fig. 5, and heated. The insets may be made of metal, thermo-plastic material, glass or porcelain ; a metal inset may be made by suspending a hemispherical former of steel within the flask and charging the space between the flask and former with metal. The inserts a<1> may be cylindrical. Fig. 15 shows a modification suitable for making large articles in which semi-cylindrical open-ended superposed insets are enclosed within square flask portions r, the ends of which are enclosed by plates u. The insets may be adjusted in position by means of studs w which pass through holes in the parts r, and may be held together by screws.
Patent GB-666587-A (GB)
Title: Improvements in or relating to roller skates
Filed: 1949-03-08
Abstract: 666,587. Roller skates. HORN, E. VAN. March 8, 1949, No. 6334/49. Addition to 665,286. Class 132 (i). A roller skate as described in the parent Specification is modified in that the pressure on the two resilient members encircling the king pin may be varied independently. The roller axle 21 is mounted in an axle bracket 22 attached to the truck arm 23 the upper part 23A of which engages a cavity 28. The king pin 30 extends between the footplate 20 and the flange 26 of the axle bracket and is surrounded by resilient members, the pressure on each of which is varied independently by the nuts 43 and 59 respectively. Each nut may have a cavity 47, Fig. 4, arranged to receive a projection, such as 45, on one of the members 41 and 58 so as to lock the nut in position. An alternative junction of upper part of the truck arm and foot plate, Fig. 5 (not shown), includes a ball and socket joint.
Patent GB-622326-A (GB)
Title: Improvements in apparatus for the softening of water
IPC: C02F1/52
Filed: 1947-03-07
Abstract: 622,326. Softening water. PARKER. E. B., BANNISTER, H. W., and LIVERPOOL BORAX CO., Ltd. March 7, 1947, No. 6446. [Class 46] The apparatus comprises a number of chambers disposed one within another, water with a reagent being led upwards through one chamber in one pass, then back in a reverse direction along another chamber in a second pass, and then back in the original direction through a third chamber in a third pass, a second reagent being added to the water after at least. one pass has been completed. Water to be softened is fed into the base of a chamber 2 by a pipe 1, and a reagent such as lime led in by pipe connection 3, both preferably tangentially, the mixture then rising and circulating round a central tube 4. At the point where the water overflows with the central tube 4, a second reagent, such as sodium carbonate and/or sodium bicarbonate, is introduced by the pipe connection 5. From the bottom of the tube 4 the water rises in the outer chamber 6 through a filter bed 7 to the outflow 8. Sludge may be discharged from the pipe 9 and also from the valved branch 10. To avoid unbalanced stresses when filling or emptying the chambers, one-way-opening balancing- valves 12, 13, opening respectively into the chambers 2, 6 are provided. The second reagent may be introduced at the bottom instead of at the top of the tube 4.
Patent GB-127636-A (GB)
Title: Improved Means for Obviating the Breakage of Return Springs in Lewis Machine Guns.
Inventor: BISHOP FRANCIS CHARLES
IPC: F41A3/82
Filed: 1917-05-07
Abstract: 127,636. Bishop, F. C. May 7, 1917. Machine guns.-Consists in forming the hub or collet a of the mainspring of a Lewis machine gun of eccentric form with a shoulder d, Fig. 2, of depth equal to the thickness of the spring, behind which the inside end of the spring is attached. The shoulder is formed by gradually increasing the radius of the collet, as shown in Fig. 2, or by keying a special sleeve b to the usual concentric collet a, as shown in Fig. 8. The sleeve has a slit b<1> in line with the usual radial recess a<1> wherein the beaded end of the spring is held, the upper end of the recess being enlarged as at a<2> to hold the beaded end of the spring in the modified collet. The spring may be attached to the collet by means of an eye engaging over a triangular undercut projection e, as shown in Fig. 2.
Patent GB-888392-A (GB)
Title: Improvements in or relating to frequency division circuits
Inventor: CAWRSE BRUNSWICK CEDRIC CHARLE
IPC: H03K3/04
Filed: 1959-02-25
Abstract: 888,392. Valve frequency dividing circuits. AVIATION, MINISTER OF. Feb. 24, 1960 [Feb. 25, 1959], No. 6474/59. Class 40(6). A frequency divider comprises a pair of valves reciprocally coupled via a pair of circuits each comprising a diode in series with a parallel resistance/capacitance combination. Fig. 2 shows a bi-stable circuit capable of dividing by ten. Square or sine signals are D.C. restored by diode D3 before being fed as negative going signals to the grids. Assuming valve V1 has just been driven into conduction, the fall of voltage at the anode will cut off diode D2 so that V2 is cut off by the cathode voltage of V1. V2 will remain cut off whilst capacitor Cl is discharged via resistor R3. The negative signals are amplified and inverted by V1, but cannot reach the grid of V2 until capacitor C1 has discharged sufficiently to render D2 conductive. The values of R3, R4, R7 are such that V2 cannot be made conductive again until the next amplified signal from the anode of V1 after D2 has been made conductive. The fifth amplifying signal from the anode of V1 will drive V2 into conduction, re-charging Cl via D2, the fall in V2 anode voltage cutting off D1 and causing a change of state which is maintained until C2 has discharged via R5, when the tenth signal will cause a further change of state. Resistor VR1 is adjusted so that the valves operate symmetrically. A double frequency output is then available from terminal A. In Fig. 1 (not shown) the input signals are fed in via a differentiating circuit. Design criteria are included.
Patent GB-1544883-A (GB)
Title: Phenoxypropanolamines
IPC: C07C253/00
Filed: 1977-02-16
Abstract: Novel 1-(2-phenyl-2-hydroxyethylamino)-3-phenoxypropan-2-ols of formula I are prepared from compounds in which at least the amino group or one of the radicals R1, R2, R5 or R6 is protected, by hydrogenolytically removing the protective group. The symbols in formula I have the meaning given in the patent claim. The compounds of formula I have a cardiovascular action and furthermore have a vascular-dilating, antihypertensive and antiarrhythmic action. <IMAGE>
Patent GB-491166-A (GB)
Title: Improvements in or relating to strain gauges for machine frames and the like
IPC: B21B37/00
Filed: 1937-03-06
Abstract: 491,166. Linear - dimension gauges. UNITED ENGINEERING & FOUNDRY CO. March 6, 1937, No. 6709. Convention date, May 20, 1936. Addition to 485,227. [Class 106 (ii)] Relates to the strain gauge described in the parent Specification in which a bar attached at one end to a machine frame extends along a length thereof, relative movement between the free end and the frame being measured and the bar being maintained at the same temperature as the frame, and consists in providing the bar with an armature movement which in an adjacent magnetic field operates the indicating mechanism. A vertical rod 2 is attached at the lower end by a bolt 3 to the housing post 1 of the mill. The upper end is reduced in section and guided in the groove 11 of a channel bar 12 secured to the housing 1. A frame 7 of magnetic material has mounted upon it a pair of parallel transverse polepieces 14, 15 and is secured at 8 to a support 9 guided in the groove 11. Upon the polepieces 14, 15 are mounted solenoids 16, 17 forming with them electromagnets 18, 19. Between the polepieces is mounted an armature 21 carried by a support 5 secured at 4 to the upper end of the rod 2. The support 9 is slotted and may be finely adjusted by a differential screw device 32, 33 and clamped by a main screw 29 to the housing 1. The solenoids 16, 17 are connected up in a bridge circuit with resistances or reactances 20 and an ammeter 26, and supplied with alternating current by leads L1, L2. When the frame or housing is under strain due to work passing through the rolls, the coils 16, 17 move relatively to the armature 21 and the balance of the bridge is disturbed and restored in the usual manner by adjustment of the resistance 20 such adjustment being a measure of the deformation. For calibration purposes, the rolls may be moved apart by hydraulic jacks and the load to produce a predetermined deformation noted. The bar 2 is housed in a casing 44 containing oil and this in turn enclosed by the insulated lower half of a two part casing 47. The oil is poured in at the top of the casing 44 while the upper half of the casing 47 is secured and the oil may be withdrawn through a plug-hole 45. In a modification the whole instrument is located in a recess formed in the housing which recess is closed by a cover plate. The bridge may assume various forms, one passing rectified current to the indicating instrument, another having several indicating instruments for location at various points and a third having each polepiece 14, 15 supplied with primary and secondary coils which function as transformers.
Patent GB-690556-A (GB)
Title: Improvements relating to egg cups
IPC: A47G19/28
Filed: 1950-03-18
Abstract: 690,556. Egg cups. SUMMERSGILL, J. F. March 16, 1951 '[March 18, 1950], No. 6806/50. Class 128 An egg cup 1 having a downward internal taper is supported either by an outwardly flared skirt 2, or by outwardly and downwardly curving legs (not shown). Where the skirt joins the egg cup there may be an internal. rim 3.
Patent GB-689584-A (GB)
Title: Improvements in electrodes for electrically-heated glass melting furnaces
IPC: H05B3/03
Filed: 1950-03-20
Abstract: 689,584. Electrode for glass furnaces. BRITISH HEAT RESISTING GLASS CO., Ltd., and HANN, D. G. March 19, 1951 [March 20, 1950], No. 6824/50. Class 39(iii) An electrode 21 for a glass melting furnace is vertical and is fixed to the upper part of a metal pillar 16 disposed partly in an opening in the furnace base 10 and partly in the lower part of the furnace. The pillar 16 is mounted on a separate vertical metal stem 14 of smaller cross-section disposed in the lower part of the opening. The electrode comprises vertical molybdenum strips 21 arranged edge to edge attached to horizontal metal 1 strips 20 and is screwed to a step in the end of the pillar 16, the electrode projecting a considerable distance from opposite .sides of the pillar. The lower end of the stem has a tapered recess into which fits closely the tapered end of the stem 14. A copper sleeve 22 is fitted on the stem 14, and crushed glass 26 is fused as shown to seal the opening in the furnace bottom. Nitrogen is blown in through a passage 27 with openings 28 in the lower part of the sleeve during fusion of the glass. The lower end of the sleeve has fins 30 cooled. by air from a nozzle 31. Current is supplied through a clamp 32 on the stem 14. Specification 689,583 is referred to. Reference, has been directed by the Comptroller to Specification 664,121.
Patent GB-592518-A (GB)
Title: Improvements in or relating to apparatus for controlling variations in an electricalor mechanical quantity
IPC: G01S1/02
Filed: 1945-03-19
Abstract: 592,518. Sights. WESTERN ELECTRIC CO., Inc. March 19, 1945, No. 6924. Convention date, Feb. 23, 1944. [Class 92 (ii)] [Also in Group XXXVIII] In apparatus for translating observed variations in position. of a moving object, e.g. an aircraft, into corresponding variations in an electrical or mechanical quantity, undesired variations such as are due to observational errors are minimised by smoothing the electrical (or mechanical) variations in dependence on an average value of the first derivativethereof over a predetermined time period. As applied to an aircraft course predictor, the wipers 5-6, 12-13-14, 20-21 of three sinusoidally wound potentiometers 2-4, 7, 17 are moved either manually or automatically in known manner in correspondence with the range of the aircraft, its elevation Eo, and its azimuth A0, respectively. The potentiometer windings 2, 4 are energized from separate D.C. sources 1, 3 and with the angular displacements of the brushes of each potentiometer as shown the voltages x0, y0, v0 derived from the brushes 20, 21 and 12, respectively, correspond to the rectangular co-ordinates of the aircraft. These voltages are applied over lines 22-24 to any suitable computing system 25 and are also applied to condensers 26-28 respectively, whereby the currents fed to the constant gain amplifiers 29, 30, 31 are proportional to the time derivatives of x0, y0, v0. Each amplifier comprises stages 35, 36, 37, Fig. 4, coupled through suitable networks, e.g. as described in U.S.A. Specification 1,751,527, the final stage being so connected so as to give zero output in the absence of a signal. Negative feed-back is supplied over a resistor 44 from a tapping on the output potentiometer 43 or direct from the anode of tube 37. It is shown in the Specifications that the amplifier introduces some smoothing of the observed value derivatives, the remaining smoothing being effected in filter networks 45-47, Fig. 2, of the lattice or bridge type, Fig. 3 (not shown). The Specification also shows mathematically the manner in which the network constants are derived. The outputs of the networks 45-47 proportional to the smoothed derivatives of x0, y0, v0 are fed, if desired through amplifiers as shown in Fig. 4, to potentiometers 60-62, the brushes of which are adjusted manually or automatically in known manner proportionally to any desired time interval such as the time of flight of a shell travelling from the point of observation to the aircraft. The voltages supplied thereby to the computing system are thereby proportional to the smoothed values of the predicted displacements in the rectangular co-ordinates of the aircraft.
Patent GB-312702-A (GB)
Title: Improvements in heat exchangers
IPC: F28D9/00
Filed: 1928-03-06
Abstract: 312,702. Owen, W. H. March 6, 1928. Plate apparatus.-Heatexchanging cells for use in apparatus as described in Specification 228,218, [Class 64 (i), Heating liquids &c.], are formed by two juxtaposed thin metal sheets A united along their edges except to leave laterally arranged inlet and outlet ports B, C, one or both plates being transversely corrugated in a panel situated centrally so as to leave a clear wall adjacent the ports and clear lateral margins. The corrugations may be parallel, or opposite as shown in Fig. 4.
Patent GB-991111-A (GB)
Title: Improvements relating to valves for controlling the flow of fluids
IPC: F16K5/20
Filed: 1961-02-28
Abstract: 991,111. Valves. W. GOMERSALL. Feb. 21, 1962 [Feb. 28, 1961], No. 7202/61. Heading F2V. A fluid-control valve comprises a valve body having inlet and outlet openings 3, 4, and associated resilient seat rings 6, 7, such as of natural or synthetic rubber, a quasi-spherical diametrically bored closure member 10 rotatable by means 8, the contour of the closure member being such that it automatically compresses the rings when the member is moved to the closed position and relieves the pressure when moved to the open position, the closure member being formed from two separate portions secured together. The closure member is flattened in the inlet and outlet regions of the bore through the member so that sealing pressure is relieved in the open position. The plug is cored out at 13 for lightness, and the two symmetrical portions joined together by plates 11, 15. The pressure on the resilient seat rings 6, 7 may be adjusted by means of the movable support ring 5 in which the seat ring 7 is mounted. In a modification, the two portions of the closure member may be secured together by means of a circular locking ring fitted over a boss formed on the top of the closure member.