baber/WOPTO huggingface dataset:
Patent GB-1242559-A (GB)
Title: Improvements in or relating to lasers
IPC: H01S3/098
Filed: 1968-11-01
Abstract: 1,242,559. Lasers. SIEMENS A.G. 1 Nov., 1968 [3 Nov., 1967], No. 51880/68. Heading H1C. In order to stabilize the amplitude of the output beam of a laser a non-linear absorption filter which provides progressively increasing absorption with increasing energy density of the laser radiation is positioned in the laser resonant cavity. The non-linear absorption filter can be formed by any substance which has at least two transitions the frequency intervals between which, related to the frequency of the stimulated emission are in a harmonic ratio to one another, Figs. 2, 3 (not shown) in which three level systems are discussed each having two transitions with a ratio of 1:1 and 2 : 1 respectively. It is shown that with such absorbers the absorption coefficient rises with rising incident energy density. If the frequency intervals differ from one another then the absorption filter also acts as a non-linear frequency changer. In a first embodiment a neodymium doped yttrium aluminium garnet active medium is disposed between two parallel plane mirrors and in order to stabilize the amplitude of the laser emission a body of lithium niobate is inserted in the resonant cavity in the path of the stimulated emission. The wavelength of the stimulated emission 1À06 Á is converted to a wavelength of 0À503 Á which frequency conversion involves an energy loss which increases with rising energy in the stimulated emission supplied to the absorber thereby providing a stahilising effect upon the output radiation by negative feedback. The non-linear absorber may be controlled by pumping Fig. 4 wherein a laser active medium M and controlled absorber A<SP>1</SP> are positioned in cavity S1 S2. A small fraction of the laser output beam is deflected by partially transparent mirror S3 to photodiode PH connected to amplifier V. The output of the amplifier is connected to electrodes on the absorption filter A<SP>1</SP> which controls the pumping of the absorption filter A<SP>1</SP> whereby with rising amplitude in the laser output beam the filter A<SP>1</SP> is controlled to produce increasing absorption and vice versa. If the absorption filter consists of a semi-conductor or a gas e.g. CO 2  the pumping can take the form of a current flow or gas discharge or light. The frequency stability of the laser can be improved by including an additional selectively saturable absorption filter in the resonant cavity.
Patent GB-1397283-A (GB)
Title: Lining for metallurgical vessels
IPC: C04B35/03
Filed: 1972-11-10
Abstract: 1397283 Metallurgical converter linings DIDIER-WERKE AG 10 Nov 1972 [13 Nov 1971] 52035/72 Heading F4B A basic refractory brick for lining a metallurgical converter comprises comoulded magnesite and dolomite portions the former consisting of tar bonded magnesite containing 92-99% by weight of MgO and the latter constituting at least 10% of the brick length and containing 50-65% by weight of CaO this portion also facing inwardly of the converter when assembled in the lining. The above bricks are used in the most stressed parts of the lining the magnesite portion 3 in zone 10 comprising 81% of the brick length, that in zone 11 being 63%, that in zone 12 being 33% and that in zone 13 being 44%. The joints 7 in the bricks may be serrated or dovetailed and may be formed by using a suitably shaped metal partition during moulding.
Patent GB-1303016-A (GB)
IPC: H03K3/30
Filed: 1971-11-11
Abstract: 1303016 Heart pace-makers ESB INC 11 Nov 1971 [11 Dec 1970] 52477/71 Heading ASR [Also in Division H3] A pulse generator in a beam pacemaker is supplied by parallel connected batteries such that if one battery fails the pulse rate changes. This will give an external indication of the failure. The generator shown is of blocking oscillator type in which a timing capacitor is charged through resistors until transistor 25 starts to conduct, whereupon, by regenerative action both transistors 25 and 26 are turned on and then turned off. During the on period the capacitor is discharged and the transistors accordingly remain off until the capacitor has recharged. The supply is obtained from three parallel batteries connected to the supply line via isolating diodes and to the charging circuit via resistors 50, 52, 54. If a battery fails the charging current through the corresponding resistor falls and the pulse rate reduces. The pacemaker may be as shown in Fig. 2, one electrode being the side wall and the other a pole (72) in the form of a transvenous catheta for connection to the endocardium.
Patent GB-526529-A (GB)
Abstract: 526,529. Rotary distributers and contactbreakers. BOHLI, J. March 18, 1939, No. 8741. Convention date, March 21, 1938. [Class 38 (v)] A magneto for internal combustion engines is mounted on the same shaft 1 as its circuitbreaker and distributer. A block of insulation material 7 is formed to give two hollow internal spaces, the upper space containing the circuitbreaker 10, and the lower space the distributer rotor 2. Shoulders 13, 14 and flanges 18 are fitted on the distributer - block and magneto housing for centring the distributer.
Patent GB-1085458-A (GB)
Title: Improvements in or relating to looms
IPC: D03D47/00
Filed: 1965-12-14
Abstract: 1,085,458. Shuttleless looms. A. E. MOES-, SINGER. Dec. 14, 1965 [Dec. 22, 1964], No. 53002/65. Heading D1E. Weft is picked by a gripper shuttle, then released by the gripper shuttle and clamped at the exit side of the shed, and is then pulled back through the shed and the clamp to the connect position. Weft 1 is picked by a gripper shuttle 8 and the weft is gripped by a clamp 14 and a suction tube 13. The weft is then pulled back by pulling means 5. At beat up the pulling means releases weft to allow for the movement of the stay. Weft is cut by cutters 16, 17 and, one side is clamped by a clamp 7 and the loose end is sucked away through the suction device 13. In a modification, Fig. 6, weft is clamped between members 21, 22 by the action of spring 31 when the pulling means 5 operates. The clamp 28, 29 operates from a cam on the loom to maintain tension in the weft.
Patent GB-1244450-A (GB)
Title: Improvements in or relating to tape transport apparatus
IPC: G11B23/107
Filed: 1969-10-30
Abstract: 1,244,450. Feeding record tapes. NEWELL INDUSTRIES Inc. 30 Oct., 1969 [6 Nov., 1968], No. 53130/69. Heading G5R. In a tape transport of the roll-to-roll type, Fig. 1, the supply roll 14 is contained in a cartridge 48 which is urged towards the tapefeeding means, e.g. capstan 13, the take-up roll 16 being formed outside the cartridge 48. As shown, the capstan 13 engages the periphery of the supply roll 14 through a window in the cartridge 48 and drives the tape past guide blocks 91, 94 and a resiliently mounted transducer assembly 93 to a take-up hub 68. A spring 53 acts through pivoted arms 54, 67 to urge the tape rolls 14, 16 towards the capstan 13. Friction in the mounting of the arms 54, 67 opposes the advancing and retreating movements of the rolls 14, 16 so that the capstan 13 exerts a greater thrust on the take-up roll than on the supply roll. Fast rewind is initiated by rotation of a knob 103 to swing a reverse gear (107, Fig. 2) into operative position. Loading and unloading of a cartridge 48 in guides 63 is facilitated by manual withdrawal of the arm 54 (by means of a knob 59, Fig. 2). In an alternative construction, Fig. 12, the tape rolls are contained in separate cartridges 120 urged towards a capstan 113 by a spring (132, Fig. 15) acting through catches 136 which are rotatable to permit loading and unloading of the cartridges. A frame, Fig. 10, detachably carries a plurality of such assemblies 111 with their capstans 113 in contact with rollers 167 which engage pairs of rollers 169, 171 so that, by means of electromagnetic clutches (Figs. 20 to 22), each capstan 113 may be driven in either direction by one or other of a pair of counterrotating shafts 172, 173 or braked by a stationary shaft 168. The belt-drive (Figs. 18 and 19) to the shafts 172, 173 is such that reversal of the direction of rotation of the drive motor (189) changes the speed but not the direction of rotation of the shafts.
Patent GB-1487324-A (GB)
Title: Gas turbine engines
IPC: F02C3/04
Filed: 1973-11-15
Abstract: 1487324 Gas turbine plant; gas generators ROLLS-ROYCE Ltd 11 Nov 1974 [15 Nov 1973] 53135/73 Heading F1G A gas turbine engine utilized as a core engine or gas generator comprises a multi-stage axial-flow compressor having at least one stage of variable pitch stator vanes, and a single-stage supersonic turbine, the turbine and the compressor being mounted on a common shaft. A supersonic turbine is shown in Fig. 2, the gas flow attaining supersonic velocity in the inlet guide vane assembly 142 as indicated by the shock wave pattern 146. The relative velocity of the gas as it enters the rotor blade assembly 143 is subsonic but the velocity becomes supersonic at the discharge throats of turbine rotor blades as indicated by the shock wave pattern 148.
Patent GB-1224999-A (GB)
Title: Container closure and a method of securing the same to a container
IPC: F16M13/04
Filed: 1968-11-08
Abstract: 1,224,999. Container closures. ALUMINUM CO. OF AMERICA. 8 Nov., 1968 [14 Nov., 1967], No. 53149/68. Heading B8T. A closure fitment 10 of the type described in Specification 1,224,998 (or the type of cap with a top portion removed) is secured to a neck of a container 64 by the application of pressure around the circumference of a bead 20 of the fitment so as to effect inward curling of the bead. The hollow bead 20 is of such a diameter that it is able to curl within itself in response to the pressure and in any event is less than eight times the nominal gauge of the sheet material. The radius 40 is the minimum bend radius which will not result in fracture in making the bend. Liner 50 may be formed from rubber, paper, cardboard or synthetic plastics. Sealing head 74 is applied to the top of the fitment 10 to seal liner 50 against surface 66, and thereafter relative movement of the sleeve 78 inwardly deforms bead 20. In modified forms of liner, the sealing surface is made in the side of the neck or at the undersurface 70.
Patent GB-1312906-A (GB)
Title: Charged particle beam scanning device with electrstatic control
IPC: H01J31/12
Filed: 1971-11-16
Abstract: 1312906 Discharge tubes NORTHROP CORP 16 Nov 1971 [16 Nov 1970] 53222/71 Heading H1D Charged particles from an area source 16, Fig. 1, pass to an area target 14 via control electrodes 25-30 provided with aligned apertures, each control electrode being provided on each face with a pair of electrodes arranged in the same pattern. The pattern may be arranged as shown with the electrodes connected to associated bi-stable circuits 75-79 so that only one channel is open to passage of particles, according to the states of the circuit 75-79; one electrode of each pair is connected to a negative potential Vc and the other to a positive potential which is V 1  or V 2  in alternate plates, these alternating potentials serving to focus the particles along the open channel or channels. Corresponding electrodes on opposite sides of a control electrode are preferably connected by conductive linings in the channels (Fig. 2, not shown); the diameter of a channel is preferably equal to its length and to the width of a spacer plate (not shown in Fig. 1) separating adjacent control electrodes, this distance being 0À015 inch when V 1  and V 2  are 10 and 15 volts respectively. The arrangement shown includes a lens plate 20 having an accelerating potential connected between conductive surfaces on its two faces, a modulation plate 50, and one or more dynode plates 54. The particles are preferably electrons but could be positive or negative ions, and the source may be a radio-active coating of tritium.
Patent GB-1568715-A (GB)
Title: Chromium complex dyestuffs
IPC: D06P1/10
Filed: 1976-12-21
Abstract: Asymmetric 1:2 chromium complexes which contain a single sulpho group in salt form and which correspond to the formula <IMAGE> wherein the variables X1, X2, Y, A, A2, B and M have the meaning given in Patent Claim 1, are prepared by addition reaction of the 1:1 chromium complex of one azo compound with the other metal-free azo compound, or vice versa. These chromium complexes are used for dyeing and printing natural and synthetic polyamides or polyurethanes, for dyeing leather or metals such as anodized aluminium, and for the bulk spin-dyeing of polyamides or of acetate rayon; chromium complexes soluble in organic solvents are moreover used in printing lacquers (varnishes) and ball point-pen inks.
Patent GB-1398370-A (GB)
Title: Rotary pump and valve assembly
IPC: F04C2/10
Filed: 1973-11-16
Abstract: 1398370 Rotary positive-displacement machines SAFE WAY HYDRAULICS Inc 16 Nov 1973 53414/73 Heading F1F In apparatus for energizing an hydraulic motor 34, 35, 36 through supply and discharge conduits 32,33 inlet and outlet grooves 67,68 of a reversible gerotor pump are connected to said conduits by way of passages 56,57 containing spring-loaded check-valve balls 60, 61 and a chamber 37 containing a spool valve-element with stems 49 to unseat the balls 30 of check valves 26,27. Depending upon the direction of rotation of a reversible electric motor driving pump members 16,17 fluid enters the conduit 32 or 33 from the outlet groove 67 or 68 through a passage 50 or 51  which has a throat 54 or 55, and the valve 26 or 27, the spool valve-element being shifted by the pressure of the outgoing fluid so as to open the passages 57, 58 and unseat the ball 30 of the check valve 27 or 26. Fluid expelled from the motor by the piston is sucked into the inlet groove 68 or 67 past the unseated ball 30 and through the passage 51 or 50. If the rate of flow of fluid discharged by the motor exceeds that of the fluid supplied the surplus fluid returns to a reservoir 44 past the ball 60 or 61; but if said rate is less than that of the fluid supplied the extra fluid required is drawn from the reservoir past the ball 61 or 60. When the electric motor is stopped the spring 31 of the unseated ball 30 partially restores the spool valveelement to the neutral position, the reservoir pressure transmitted through a passage 64 or 65 restoring the element fully to said position. The throats 54,55 are said to prevent cavitation in the pump.
Patent GB-1130038-A (GB)
Title: Refrigerating equipment for refrigerator cabinets or the like
Inventor: REIF PAUL
IPC: F25B41/06
Filed: 1965-12-16
Abstract: 1,130,038. Refrigerating. R. & C. SCHMOLE METALLWERKE K.G. 16 Dec., 1965, No. 53490/65. Heading F4H. [Also in Division B3] Refrigeration apparatus comprises an evaporator 1 having a tubular connecting portion 3, and a suction pipe 8 having a portion 8b of enlarged external cross-section which when the end 8c of pipe 8 is inserted into portion 3 abuts the end of the latter and is connected thereto by welding or soldering at the line of abutment. The evaporator and pipe 8 consist of aluminium or an alloy thereof and the suction line further comprises a copper pipe 9 having a tapering portion 9b through which the copper capillary tube 5 for supplying liquid refrigerant to the evaporator is introduced into the suction line. The end 4 of pipe 9 is connected directly to pipe 8 by welding. Alternatively pipe 9 is formed of steel and is provided at its end with internal or external non- communicating grooves (Figs. 6 to 8, not shown) into which the material of the end of pipe 8 is pressed in a cold-forging process.
Patent GB-1368128-A (GB)
Title: Process for dyeing cellulose fibres
IPC: D06P3/68
Filed: 1971-11-19
Abstract: 1368128 Dyeing wound packages of cellulose fibres FARBWERKE HOECHST AG 19 Nov 1971 [20 Nov 1970] 53834/71 Heading D1B Slivers and yarns of cellulose fibres are dyed in the form of a wound package by impregnating the package with an aqueous alkaline liquor containing an azo coupling component followed by injecting one or more weakly acidic aqueous solutions each containing a mixture of one or more reactive dyes and one or more diazonium compounds derived, from an aromatic amine, the package then being allowed to dwell at a temperature from room-temperature to 60‹C to fix the dyes. Reactive dyes containing vinylsulphonyl groups are preferred, the impregnation may be at 20 to 70‹C and preferred coupling components are arylamides of aromatic or heterocyclic 0-hydroxy-carboxylic acid or of an acylacetic acid or an aromatic or heterocyclic hydroxy compound or a compound containing an enoligable for enolized ketomethylene group in a heterocyclic ring.
Patent GB-1417810-A (GB)
Title: Method of recovering maleic anhydride
IPC: B01D53/77
Filed: 1973-11-22
Abstract: 1417810 Recovering maleic anhydride CHEVRON RESEARCH CO 22 Nov 1973 [29 Nov 1972] 54371/73 Heading C2C Maleic anhydride is recovered, from a gas stream containing it, by contacting the gas stream with, as scrubbing agent, a di-(C 4-8  alkyl)<SP>1</SP> 1  phthalate, in which the alkyl groups contain a total of 10-14 carbon atoms or a mixture thereof, in the liquid phase at at least 10‹ C above the dew point of water under the contacting conditions but at not more than 260‹ C., at a pressure sufficient to effect maleic anhydride absorption.
Patent GB-1187236-A (GB)
Title: Alkylation Process
IPC: C07C2/62
Filed: 1967-11-29
Abstract: 1,187,236. Alkylating isoparaffins. TEXACO DEVELOPMENT CORP. 29 Nov., 1967 [7 Dec., 1966], No. 54433/67. Heading C5E. A process for alkylating an isoparaffin with an olefin in the presence of sulphuric acid comprises the following steps: (a) reacting an olefin with used sulphuric acid thus forming an absorption reaction product comprising a dialkyl sulphate phase and an acid absorption phase; (b) separating said dialkyl sulphate phase from said acid absorption phase, e.g. by extraction with isobutane; (c) treating the separated dialkyl sulphate phase with sulphuric acid (to remove polymeric oil), and separating the treated dialkyl sulphate phase from the acid phase, e.g. by settling; (d) extracting dissolved dialkyl sulphate from the acid phase resulting from (c) by means of a hydrocarbon, e.g.: isobutane; (e) separating the hydrocarbon phase formed in step (d); (f) charging to an alkylation zone an olefin, an isoparaffin, the dialkyl sulphate phase from step (c), the hydrocarbon phase from step (e), and sulphuric acid catalyst; and (g). separating used sulphuric acid from an alkylation zone and passing it to step (a). The hydrocarbon extractions in steps (b) and (d) may be conducted in a single zone. An example describes alkylation of isobutane with butylene and dipropyl sulphate.
Patent GB-1166849-A (GB)
Title: Blood Grouping Test Kit
IPC: G01N33/487
Filed: 1966-12-08
Abstract: 1,166,849. Blood grouping test kit NORDISK INSULINLABORATORIUM. 8 Dec., 1966 [8 Dec., 1965], No. 55045/66. Heading B1X. A test kit for blood grouping comprises a card having a plurality of test areas thereon and an instrument for transferring a blood to, and storing the drop on, each of said areas simultaneously, said instrument comprising a body portion 8 and prongs 9, the ends 10 of which are arranged in the same pattern as at least some of the test areas. As shown in Fig. 2, to which the numerals refer, the instrument is planar, the prongs are bent at 11, and the ends thereof lie in the same plane so that stirring can be effected by moving the instrument in a plane parallel to and spaced from the card. The test areas may contain a test serum (e.g. anti-A, anti-B, anti- D and an unspecific serum) together with conglutinin or conglutinin substitute (e.g. dextran) and salt.
Patent GB-1328540-A (GB)
Title: Method and devices for the longitudinal stability of helicopters
IPC: B64C27/32
Filed: 1970-10-20
Abstract: 1328540 Improving longitudinal stability SOC NATIONALE INDUSTRIELLE AEROSPATIALE 20 Nov 1970 [27 Nov 1969] 55284/70 Headings B7G and B7W A method of improving the longitudinal stability of a helicopter H is characterized in that any incipient longitudinal divergence of the helicopter is compensated by creating an opposing moment generated by an inertiaactuated stabilizer E located at the tail end of the helicopter. The stabilizer E pivotable by the inertia of a weight 12 attached indirectly thereto generates a compensating moment which when equilibrated determines a new stabilizer position having a modified lift value which generates a further moment to counteract the initial divergence. Stabilizer E is bolted on to a channel shaped support 4 forming a lever arm, and having two depending flanges 13, 14 and a weight 12. Spaced vertical flanges 17, 18 having openings 19 (20) form an intermediate member within support 4 through which the stabilizer is connected to a vertical stabilizer D by hinge pin 21 and a bell crank 25 depends from flange 18 and is adjustably mounted for setting the equilibrium position of the stabilizer E, in a slotted bracket 30 also secured to stabilizer D. Flanges 13, 14 and 17 18 are differently spaced through hinge pins 45, 46 and 43, 44. A return spring 37 limiting the moment generated, extends between stabilizer 10 and a spacer pin 39 between flanges 13, 14. Vertical flanges 17, 18 are hingedly connected to divergent links 41, 42 through pins 43, 44 the links forming part of the coupling between the stabilizers D and E. A stabilizer damper is also located between flanges 17, (18). Before operation while the helicopter is grounded support 4 is set in an equilibrium position corresponding to the degree of weight attached to the lever arm, a restraining peg (58) Fig. 3 (not shown) is then removed to allow inflight operation. In an alternative embodiment Fig. 10 (not shown) the device is mounted on a tail boom with two half stabilizers 66 projecting one from each channel section 68 located one on each side of the boom and pivotable on a common spar axis 85. The rear end of section 68 carries a weight 69 and the front carries a spring 69a extending down to a transverse arm 77 pivotable on a clevis (78) Fig. 13 (not shown) on the helicopter centre line; the section 68 is pivotable at its front between two brackets 82, 83. A damper 70 and associated linkage 72, 73 are also provided. The stabilizers could be provided with additional control surfaces and the device is especially suitable for use in a helicopter having a rotor with flexible blades, devoid of hinges.
Patent GB-1284471-A (GB)
Title: Producing erosion electrodes
Inventor: HERTEL HEINRICH
IPC: B21D37/20
Filed: 1969-11-17
Abstract: 1284471 Making electrodes; stamping; spark erosion H HERTEL 17 Nov 1969 [15 Nov 1968] 56205/69 Headings B3A, B3Q and B3V [Also in Division C7] An electrode for use in electro-erosion or electro-chemical machining is made by a deforming operation using a die 11 which is a negative of the electrode. The deformation may be by rubber drawing, hydro-mechanical drawing, explosive forming, hydro-spark forming or electromagnetic forming. The electrodes for forming the upper and lower die of a tool set are made in a single operation from rolled copper sheets 12, 13, 14. The concave side of electrode 12<SP>1</SP> and electrode 13<SP>1</SP> are used as the roughening electrode and finishing electrode respectively for the upper die whilst the convex side of electrode 14<SP>1</SP> and electrode 13<SP>1</SP> are used as the roughening electrode and finishing electrode respectively for the lower die. Alternatively, a separate die 11 may be used to form a roughening and a finishing electrode for each of the upper and lower dies of the tool (Figs. 1 and 2, not shown). The shape of the formed electrode may be controlled by an intermediate layer (15) (Fig. 4, not shown). A prefabricated upper die (16) (Fig. 5, not shown) of a tool set may be used as the negative which is placed in a ring (17) and the space therebetween filled with sealing compound (18), e.g. Woods' alloy. The sheet 12 is placed on top of the ring (17) and the space therebelow evacuated during the forming operation. After shaping, the formed workpiece is removed from the ring (17) by melting the compound (18). Selected areas (22, 22<SP>1</SP>) (Figs. 7 and 8, not shown) may be removed from the electrode by a subsequent etching operation. Material may be added to the formed electrode by electrolysis or flame spraying.