baber/WOPTO huggingface dataset:
Patent GB-944721-A (GB)
Title: New hardenable epoxy resin compositions
Inventor: STARK BERNARD PETER
IPC: C08G59/42
Filed: 1960-12-01
Abstract: The invention comprises a hardener for epoxy resins (see Division C3) comprising in admixture a compound of the formula: <FORM:0944721/C2/1> and a compound of the formula: <FORM:0944721/C2/2> where n is an integer greater than 1 and R is an organic radical of valency equal to n.  The initial mixture of dianhydrides is prepared by reacting styrene and maleic anhydride, e.g. in the presence of picric acid and benzene, and then the partial esters are prepared by reacting the mixture with a polyhydroxy compound, e.g. ethylene, propylene or polyethylene glycols, bis (4 - b  - hydroxy - ethoxy phenyl) dimethyl methane, glycerol and pentaerythritol, and, in Examples 3 and 4, polypropylene glycol of M.W. 1025 and diethyleneglycol respectively.  Specification 795,378 is referred to.ALSO:A hardenable composition comprises (a) an epoxy resin and (b) a mixture of the compound of the formula: <FORM:0944721/C3/1> with the compound of the formula: <FORM:0944721/C3/2> or with a mixture of the monoanhydride partial esters of those compounds with an organic polyhydric compound.  The compounds are prepared by reacting styrene with maleic anhydride, e.g. in the presence of picric acid and benzene, and the esters are prepared normally (see Division C2). Long lists of suitable materials are given, the following being used in the examples:-(a) an epichlorhydrin/bis-phenol A condensate, and a compound of the formula: <FORM:0944721/C3/3> (b) the mixture and esters thereof with polypropylene glycol of M.W.1025 and diethylene glycol.  Lists of additional hardeners and fillers are also given, benzyl dimethylamine with or without methyl endomethylene octahydro-. phthalic of anhydride being used in the example. In comparative examples epoxy resins are hardened with pyromollitic dianhydride with or without silica. Specification 795,378 is referred to.
Patent GB-1262362-A (GB)
Title: Improvements in audio frequency power amplifiers
Inventor: DANNAHY PATRICK THOMAS HENRY
IPC: H03F3/30
Filed: 1969-08-20
Abstract: 1,262,362. Transistor amplifying circuits. RANK ORGANISATION Ltd. 12 Aug., 1970 [20 Aug., 1969], No. 41535/69. Heading H3T. The invention relates to a power amplifier of the type comprising an output stage formed by two transistors T4, T5 of opposite polarity, connected in series with the output taken from their junction, a driver stage for the output stage, an input stage T1 and overall negative feedback, provided by resistor R6 between the output and input stages. According to the invention, the driver stage includes a driver transistor T3 for driving the output transistors and a pre-driver stage T2 connected to drive the driver transistor, the pre-driver stage T2 being connected in grounded emitter configuration, and the driver transistor T3 is connected in grounded collector configuration with its emitter connected to the junction of the two output transistors T4, T5. This ensures that the input to the output transistors T4, T5 is between base and emitter, effectively making them arranged in grounded emitter connection. The input stage comprises an input transistor T1 connected in grounded emitter configuration. Further features of the invention are that the emitter of the driver transistor T3 is connected to ground for D.C. through the load impedance, and to the junction of the output transistors T4, T5 for A.C. through capacitor C3. The collector circuit of the pre-driver transistor T2 includes a resistor R5 which is returned to ground through the load impedance RL, and as shown through the resistor R7 comprising the load of the transistor T3, as well.
Patent GB-1103470-A (GB)
Title: Rectangular cathode ray tube with protection against implosion and method to manufacture such a tube
IPC: H01J29/87
Filed: 1965-10-01
Abstract: 1,103,470. Cathode-ray tubes. INTERNATIONAL STANDARD ELECTRIC CORPORATION. 1 Oct., 1965 [2 Oct.. 1964], No. 41728/65. Heading HID. A rectangular cathode-ray tube is protected against implosion by a strap encircling the tube within the area of its maximum periphery, with an intermediate layer of packing provided between the tube and the strap, and after assembly on the tube, the strap is held rigidly at its comers, or along its shorter sides, and is heated to cause at least its longer sides to bow outwards providing additional space between the strap and the tube which is filled with packing before the strap is allowed to cool. The strap may be allowed to cool down over preformed filler bodies pre-fixed to the tube. The strap may be of metal, glass or plastics material and the packing of foamed rubber, plastic foil, quartz or crystal sand in cement, e.g. resins, or alloys or cements applied in liquid form. The strap 3 may be arranged in a frame 9, Fig. 6, so that it is bowed into position 3<SP>1</SP> upon heating, or it may be formed integrally with frame 9, Figs. 7 and 8 (not shown). Also, the frame 3 may have a fixed flange 11, Fig. 9, at its rearward end, packing 6 being inserted from the front when frame 3 is bowed into position 3<SP>1</SP>
Patent GB-1164136-A (GB)
Title: Measurement Bridge
IPC: G01R17/00
Filed: 1966-09-19
Abstract: 1,164,136. Measuring bridge circuits. YOKOGAWA-HEWLETT-PACKARD, Ltd. Sept.19, 1966 [Oct. 7, 1965], No.41802/66. Heading G1U. A reactance measuring bridge designed to automatically compensate for the loss factor of a component being measured, e.g. a capacitor 11, incorporates a standard capacitor 21 in parallel with an adjustable resistor 22 in a reference arm 14. The difference in phase between the bridge output e o  , amplified at 23, and the phase of the signal across the arm 14, amplified at 26, is detected at 25 and used to control the adjustment of the resistor 22 through an arrangement 28. In use the reference arm resistors RA, RB are adjusted to balance the bridge, a null being detected on meter 24, and the phase detecting control system operates automatically during the adjustment to compensate for the loss factor of the component 11. The resistor 22 may be controlled either by a motor or photo-electrically and may be replaced by a variable reactance in which case the reference phase signal must be shifted by 90 degrees. In an alternative arrangement Fig. 2 (not shown) the phase signal derived across the arm 14 is converted to a signal having a phase angle twice as large and it is explained in the Specification that this enables the phase detector to function at maximum sensitivity throughout the operating range. The arrangement may be used with fully automatic bridges and also to determined the loss factor of the component 11.
Patent GB-1418570-A (GB)
Title: Method of producing oligo esters of oxalic acid
IPC: C07C69/36
Filed: 1973-09-06
Abstract: 1418570 Oxalic acid esters ORDENA TRUDOVOGO KRASNOGO ZNAMENI INSTITUT KHIMII DREVESINY AKADEMII NAUK LATVIISKOI SSR 6 Sept 1973 42007/73 Heading C2C Oligomeric esters are prepared by reacting oxalic acid and polyhydroxy alcohols at 20‹ to 150‹ C. and at a pressure not exceeding the water vapour pressure at that temperature, and continuously removing the water vapour from the reaction zone. Examples describe the reaction of oxalic acid with glycerine, diethylene glycol, mixtures thereof, 1,3-propylene glycol, xylitol, and a mixture of ethyleneglycol and propylene glycol. An inert gas may be passed through the reactants.
Patent GB-933353-A (GB)
Title: Improved metallurgical apparatus
Inventor: PEARSON THOMAS FELIX
IPC: C22B1/20
Filed: 1960-12-08
Abstract: 933,353. Alloy steel. CONSETT IRON CO. Ltd. Dec. 7, 1961 [Dec. 8, 1960], No. 42227/60. Classes 72 and 82. [Also in Group XII] In a method for the manufacture of steel by smelting iron ore in an oxygen steelmaking furnace, lime and ore fed from hoppers 19 and 20 respectively are preheated on a foraminous endless grate 12 disposed below a chamber 11 supplied with hot waste gas from the furnace by a duct 10, the gases passing to plenum chambers 26 below the grate, each being connected by a valve-controlled duct to a common exhaust main. The grate comprises pallets 13 cast from an alloy containing:- 25% chromium 20% nickel 0.25-0.35% carbon balance iron.
Patent GB-1064819-A (GB)
Title: Fuel oil burner and a method of actuating same
IPC: F23D11/40
Filed: 1963-10-28
Abstract: 1,064,819. Burners. OPTIMAL OLFEUERUNGSMASCHINENBAU G.m.b.H. Oct. 28, 1963 [Oct. 26, 1962], No. 42326/63. Heading F4T. An oil burner has an oil atomizer 3 slidably mounted in a slide 2 forming an end wall of a cylindrical casing 1 provided with a row of air inlet orifices 1a. The air orifices in the casing 1 may be slot-shaped or of an inwardly convergent cone shape with the axes of the cones lying on tangents to a circle within the casing 1. The latter can be fixed in different positions inside a burner head 19 supplied with air from a blower 15. External screws 4, 5 control the movement of the slide 2 and the atomizer 3. An ignition electrode 8 is provided in the casing 1 and the burner may have an ionization flame governor. In a modification, the casing 1 is connected to a member slidable on a fixed pipe and moved longitudinally of the burner head 19 either by a threaded rod (Fig. 2, not shown), or by threaded rods extending perpendicularly to the burner head and locked by nuts to the burner housing, Fig. 4a (not shown).
Patent GB-1116690-A (GB)
Title: Piezoelectric quartz elements
IPC: H03H9/19
Filed: 1965-10-06
Abstract: 1,116,690. Piezo-electric resonators. WESTERN ELECTRIC CO. Inc. 6 Oct., 1965 [8 Oct., 1964], No. 42344/65. Heading H1E. A DT-cut quartz crystal resonator has a width to length ratio of substantially 0.4 and a thickness to width ratio within the ranges 0.0525 to 0.0638 and 0.0825 to 0.1138. DT-cut rectangular plates have their length parallel to the X-axis of the crystal and their major faces at an angle of substantially - 5230' to the Z- axis. The specified W/L ratio gives a low temperature coefficient and a high Q. The ranges for T/W result in the absence of unwanted flexure modes within  5% of the desired faceshear mode.
Patent GB-1375103-A (GB)
IPC: B25B23/145
Filed: 1972-01-20
Abstract: 1375103 Riveting CHICAGO PNEUMATIC TOOLCO 20 Jan 1972 [8 March 1971] 42450/72 Divided out of 1375102 Heading B3U A nut running and crimping tool as described in Specification 1,375,102 is characterized by a nut crimping mechanism comprising a plurality of crimping jaws 68 mounted around the axis of a sleeve 57, each jaw having a fulcrum point 73 and an inner wall provided with a cam surface 70 at its upper end and a crimping surface 75 at its lower end, means, e.g. a downwardly spring biased plunger 76 having a flange 79 co-operating with lugs 82 on each of the jaws, for constantly urging the levers about their fulcrum points to swing the crimping surfaces away from the sleeve axis to define an opening for receipt of a nut 29, and a coned wedge 63 movable axially of the sleeve and jaws into camming relation with the cam surfaces of the jaws so as to pivot the levers about their fulcrum points and force the crimping surfaces into compressive relation with the sides of the nut.
Patent GB-1059425-A (GB)
Title: Safety glass for vehicles
IPC: C03B27/00
Filed: 1965-10-11
Abstract: 1,059,425. Laminates. COMPAGNIE DE SAINT-GOBAIN. Oct. 11, 1965 [Oct. 10. 1964], No. 42950/65. Heading B5N. Safety glass for vehicle windows comprises a first transparent sheet which is sufficiently rigid to prevent the window from collapsing in the event of breakage, and a second transparent sheet which is made of tempered glass and which extends beyond the first sheet round at least part of the periphery to provide a projection portion which is to be used for mounting the safety glass in a window frame of a vehicle. The sheets may be cemented together by an intermediate layer of polyvinyl butyral. The first transparent layer may be glass or a plastics material.
Patent GB-1146427-A (GB)
Title: Improvements in or relating to packages
IPC: B65D75/52
Filed: 1967-09-22
Abstract: 1,146,427. Packages. DEVENTER ELASTIEKFABRIEK FORTUIN & CO. N.V. 22 Sept., 1967 [11 May, 1967], No. 43219/67. Heading B8C. A package is formed by bending a strip 3 of transparent plastics material, for example, polyvinyl chloride, into a loop and adhering together the inner faces of the strip near the ends 4. An article, which may be a card 2 carrying elastic tape 1, is enclosed by the strip, and a paper band 7 prevents the article sliding out. The band 7 may be secured to the strip 3 by adhesive tape 8, and a suspension eye 6 is provided in the sealed portion 4.
Patent GB-1214951-A (GB)
Title: Improvements in machine tools
Inventor: WIEST HORST
IPC: B23Q1/52
Filed: 1968-09-12
Abstract: 1,214,951. Machine tool details. H. WIEST. 12 Sept., 1968 [15 Sept., 1967], No. 43351/68. Headings B3B and B3C. A machine tool comprises an annular indexable work-table 5, four work stations 8, and a loading/unloading station 9. Each work station includes three slidable drilling, milling, tapping &c. heads 8, 10 and 13, Fig. 2, and table 5 carries a plurality of work supports 42, Fig. 3, one more than the number of groups of tool units 8, 10 and 13. Each work support is adjustably secured to the table by pins 43, and is urged upwardly from the table by a spring 44. The work supports are each provided with two or more centring members 46, and two or more clamping members 47, which co-operate with the heads 59, 66 of the hydraulic pistons 56 located at the work and loading stations. Control rods 61 are provided with switches 62, 63, which are actuated by rings 64 on the pistons so as to prevent the table indexing motor from operating while the workpieces are being machined. Each work support carries a workclamping member 33, Fig. 1, which member is actuated at station 9 for releasing the workpiece. The heads 8, 10 and 13 may be multi-spindle.
Patent GB-1207175-A (GB)
Title: Improvements in or relating to valve systems
Inventor: WILLIAMS ROBERT SPENCER
IPC: F22D11/00
Filed: 1967-09-23
Abstract: 1,207,175. Steam generation. G.W.B. BOILERS Ltd. 1 Feb., 1968 [23 Sept., 1967], No. 43378/67. Heading F4A. [Also in Division F2] A vessel 10, such as a steam boiler, is connected by means of pipe lines 13 and 35 to a control device 12 which serves to main the vessel liquid level constant and to actuate burners associated with the vessel when the vessel liquid level is above a predetermined value, there being provided in these lines valves 15 and 39 respectively, both of which are so constructed that the contol device 12 is never isolated. In the arrangement shown, both valves when in a first terminal position communicate the vessel with the control device, which may incorporate a float or an electrical sensing arrangement, so that the pressure and liquid level in the device are the same as that in the vessel, and when in a second terminal position isolate the device from the vessel but place it in communication with atmosphere, both the vessel and the device being placed in communication with atmosphere when the valve is in any intermediate position, the arrangement and construction of the valves thus facilitating removal from the pipe lines 13 and 35 of any debris contained therein.
Patent GB-1066504-A (GB)
Title: Improvements in or relating to optical objectives of variable equivalent focal length
Inventor: CHAPMAN ALAN
IPC: G02B7/10
Filed: 1962-11-16
Abstract: 1,066,504. Lens mounts. RANK PRECISION INDUSTRIES Ltd., [trading as RANK ORGANISATION RANK TAYLOR HOBSON DIVISION]. Nov.14, 1963 [Nov.16, 1962], No.43441/62. Heading G2J. In a zoom type objective comprising a front assembly which includes the relatively movable members A2, A3, and a normally stationary rear assembly A4, members A2, A3 are carried by two axially movable concentric tubes C1, D1, coupled together through a cam groove coupling formed by roller C4 on tube C1 engaging cam groove D5 on tube Dl, tube C1 being held against rotation by roller C5 engaging a longitudinal groove F1 in a fixed casing F, whilst tube D1 is rotated by a zoom control element through the intermediary of gears, not shown, engaging gear teeth D4 on tube D1, the latter having a roller D3 engaging a cam groove B7 on the stationary member B1. Three pairs of angularly spaced ball-mounted rollers, such as G carried by tube C1 run on the inner surface of casing F, one pair G being mounted on supports which are spring urged towards each other and have inclined faces riding up corresponding faces on members secured to tube C1 so that the rollers G are forced outwardly against casing F. The member A1 which is axially movable for focusing, is carried by a mount H1 rotatable by a ball type screwthread within a fixed extension H2 of casing F. In a modification, tube D1 is held against rotation by means of an inwardly projecting roller engaging in a longitudinal groove in the surface of tube Bl whilst the casing F, and thus tube C1, is rotated by the zoom control element. A second cam groove on the outer surface of tube D1 is engaged by a roller on a pin projecting inwardly from the casing F.
Patent GB-977402-A (GB)
Title: Improvements in turbine control system
IPC: F01K7/34
Filed: 1961-12-05
Abstract: 977,402. Turbines. GENERAL ELECTRIC CO. Dec. 5, 1961 [Dec. 7, 1960], No. 43479/61. Addition to 899,914. Drawings to Specification. Heading F1T. [Also in Division G3] In the control system for a multi-stage turbine described in the parent Specification, in which speed and extraction conduit pressure are measured and used to control jointly the position of the inlet valve and an interstage extraction valve, a switchover device provides that, should one valve approach a limiting position, the signal controlling that valve is prevented from modifying the signal to the other valve, which signal is instead boosted. The arrangement specifically described is such that, when conditions prevent the regulation of both valves, due to design limitations, the pressure control (extraction valve) is rendered inoperative and the inlet valve alone is controlled in response to speed, but it is stated that, alternatively, the speed control could be cut out and preference given to pressure control. Each valve is adjusted by a position control servo system with position and velocity feedback, and it is this feedback which triggers the switching device. The Specification describes in detail the manner in which signals proportional to speed and extraction pressure are used to effect joint control of the valves, and provision is made to preset desired and maximum permissible speed, desired and maximum extraction pressure, maximum flow in extraction, maximum and desired load and the maximum degree of opening of the valves; these settings also predetermine the maximum modification of one signal by the other. Unlike the parent Specification, the turbine speed is measured by an A.C. tachogenerator whose output is also used, when great enough, to power the control network. An "economy" setting of controls is provided wherein speed only is controlled.
Patent GB-1129790-A (GB)
Title: Adjustable steering column assemblies
IPC: B62D1/183
Filed: 1967-09-28
Abstract: 1,129,790. Adjustable steering columns. GENERAL MOTORS CORP. 28 Sept., 1967 [11 Oct., 1966 (2)], No. 44112/67. Heading B7H. [Also in Division H1] In an adjustable steering column assembly for a motor vehicle, an upper column portion 10 is mounted for both pivotal and telescopic adjustment relative to a fixed lower column portion 6, and a pair of power actuators 14, 16 mounted on the lower column portion 6 drive respective parts of screw-and-nut mechanism for producing independent pivotal and telescopic adjustment of the upper column portion 10. The upper column portion 10 is mounted for pivotal movement about a transverse axis 42 on an intermediate portion 8 telescopically mounted on the lower portion 6. A shaft 54 rotatably coupled to the actuator 14 but slidable relative thereto is axially located in bearings 60 carried by a shoe 56 mounted on the intermediate portion 8. A screw thread 64 on the shaft 54 engages a threaded sleeve 66 connected to the upper portion 10 by a link 70 and a pin 72 spaced from the axis 42, whereby rotation of the shaft 54 by the actuator 14 produces linear movement of the sleeve 66 and angular adjustment of the upper portion 10. A screwed shaft 90 secured to the shoe 56 engages a nut within the actuator 16, whereby the actuator caused linear displacement of the shaft 90 and shoe 56 to telescope the intermediate portion 8. Each actuator 14, 16 comprises a worm-wheel driven by a worm coupled through a flexible drive shaft to a remotely-disposed reversible electric motor. A control circuit (Fig. 8, not shown) for the motors includes a switch (106) movable in conjunction with the ignition switch, a multiposition manual selector switch (102, 104), and a follower switch assembly 18 comprising a pair of follower discs which are rotated in synchronism with pivotal and telescopic movement of the upper portion 10. Contact plates on the discs co-operate with fixed contact brushes to interrupt the adjustment of the upper portion 10 when the position set by the selector switch is reached. Whenever the ignition switch is moved to the " Off " position the upper portion 10 moves to the fully downwardly telescoped and fully upwardly tilted position, and returns to the position previously selected by the selector switch when the igntion switch is restored to the " On " position.
Patent GB-1518397-A (GB)
Title: Light emitting diode mounting
IPC: H05K3/32
Filed: 1976-10-23
Abstract: 1518397 Semiconductor devices AMP Inc 23 Oct 1976 44130/76 Heading H1K [Also in Division H2]  A light emitting diode 26, having electrodes on opposite sides 28, 30, is mounted in an aperture, formed in a flexible cable comprising a metal conductor 14 on a flexible insulating substrate 10, so that the opposite sides 28, 30 are supported by and electrically connected to the conductor 14. A transparent epoxy 32, which may include a lens or reflector system, may enclose the diode 26. The diode 26 may also be soldered or bonded by conductive epoxy to the conductor 14. Apertures in the form of slots may be simultaneously formed in a number of parallel metal conductors and underlying substrate by the use of a tool having a castellated blade, Fig. 1, (not shown). Also, the slot edges may have a sawtooth configuration.