baber/WOPTO huggingface dataset:
Patent GB-860407-A (GB)
Title: Catalysts for polymerisation and process for polymerisation and copolymerisation usin
IPC: C08F10/00
Filed: 1957-05-07
Abstract: Compounds containing CH2=C< groups are polymerized in the presence of catalysts formed by reacting (a) a metal of sub-groups b of Group IV or V of the Periodic Table, or a hydride or organometallic compound of such a metal, (b) a halide of an element of sub-groups a of Group IV, V or VI of the Periodic Table, and (c) a halide of an element of Group III of the Periodic Table.  The polymerization is carried out in a liquid aliphatic hydrocarbon dried with sulphuric acid and with sodium, under a pressure of 1 to 30 atmospheres at a temperature of 50 DEG  to 100 DEG  C., in a reactor dried under vacuum or by sweeping with dry and hot inert gases until the dew point of the gas leaving the reactor is below - 20 DEG  C.  In examples, ethylene is polymerized in the presence of a solvent using catalysts obtained from titanium tetrachloride, tin tetrabutyl, antimony and aluminium chloride. Lead tetraethyl and boron trifluoride are also mentioned as suitable materials for making the catalysts.  Specification 799,392 is referred to.ALSO:Polymerization catalysts are formed by reacting (a) a metal of Sub-groups b of Group IV or V of the Periodic Table, or a hydride or organometallic compound of such a metal, (b) a halide of an element of Sub-groups a of Group IV, V or VI of the Periodic Table, and (c) a halide of an element of Group III of the Periodic Table.  In examples, ethylene is polymerized using catalysts obtained from titanium tetrachloride, tin tetrabutyl, antimony, and aluminium chloride.  Lead tetraethyl and boron trifluoride are also mentioned as suitable materials for making the catalysts. Specification 799,392 is referred to.
Patent GB-138801-A (GB)
Title: A safety hydraulic or pneumatic locking device
IPC: E05B37/00
Filed: 1919-06-10
Abstract: 138,801. Smith, A. G. S. June 10, 1919. Guarding against unauthorized use.-In a locking-device, shown as applied to a motor-vehicle for the purpose of locking the steering column, the bolt B carries a piston moving in a cylinder A filled with water &c. and can only be operated by a handle C when a by-pass D is opened to allow the flow of the water. The by-pass is normally closed by a series of permutation rings E, concentrically mounted, which in certain positions open a through passage. When applied to a motor-vehicle, the bolt B may also open a switch K in the ignition circuit. A lug L secured to the dash-board &c. N prevents the device from being removed when the bolt is shot.
Patent GB-237698-A (GB)
Title: Improvements in boot trees
IPC: A43D3/14
Filed: 1924-06-19
Abstract: 237,698. Sheasby, W. A., and Tomlin, A. W. June 19,1924. Trees.-A boot tree comprising toe and heel members c, d attached to links a, b connected by a slide g is characterized by the catch member j being pivoted about an axis l parallel to the top edge of the slide. Spaced bosses k carry the hinge pin on which the member j is mounted. The slide is locked by a tongue m passing through a hole n in the slide and one of a number of holes e on the toe member.
Patent GB-1345721-A (GB)
Title: Method for producing an element of inorganic foam material
IPC: C03B19/08
Filed: 1971-05-14
Abstract: 1345721 Inorganic foam elements SENTRALINSTITUTT FOR INDUSTRIELL FORSKNING 14 May 1971 [15 May 1970] 14983/71 Heading B5A [Also in Division C1] Inorganic foam elements, e.g. building or insulating blocks, are formed by depositing successive layers of granular material, each layer being bloated before deposition of the next layer, and forced cooling being applied from the bottom after at least two layers have been bloated. The granular material may be a clay, glass powder or aggregates thereof, slag or flotation waste and may be deposited in a mould in a batch process, cooling being by e.g. air pipes under the floor of the mould. Heating is continued from above as each successive layer is deposited, together with cooling from below. The partly solidified block is then removed to a cooling chamber where cooling is continued at the optimum rate which will avoid stress cracks, as determined by theoretical considerations fully set out. A continuous process using trolleys passing through a tunnel kiln to produce a continuous length which is subsequently sliced through the thickness and cut up into blocks is also described. Additional stress relief may be obtained by the method forming the subject-matter of Specification 1,345,724.
Patent GB-348390-A (GB)
Title: Improvements in and relating to oil-circulating pumps for electric-transformers and the like
IPC: F04D29/04
Filed: 1930-05-16
Abstract: 348,390. Rotary pumps. DRYSDALE & CO., Ltd. and DRYSDALE, J. W. W., Ferry Road, Yoker, Glasgow. May 16, 1930, No. 15053. [Class 110 (i).] Pumping machines. -An impeller for use in assisting or replacing thermo - syphon circulation of liquids is arranged to offer no resistance to the passage of the liquid when it is in its position of rest. An axial flow impeller 1 is mounted on a vertical spindle 2 in the pipe 8, 9 of the liquid flow system. The impeller can slide on the spindle between the stop nut 4 and the collar 5, and when it is in engagement with the collar it is in the proper working position in the port 6 in the wall 7 dividing the suction branch 8 from the discharge branch 9. When the motor 11 is started the thrust on the impeller 1 lifts it to its working position and when the motor is stopped, the weight of the impeller causes it to drop to the nut 4. The apparatus may be used to assist the circulation of oil for cooling electric transformers or the circulation of hot water in heating installations. Specification 172,848, [Class 110 (i), Centrifugal and screw fans &c.], is referred to.
Patent GB-681402-A (GB)
Title: Power screw driver
Inventor: AUSTIN LEONARD EDMOND
IPC: B23P19/06
Filed: 1950-06-16
Abstract: 681,402. Screwdrivers. ILLINOIS TOOL WORKS. June 16, 1950, No. 15126/50. Class 61 (iii). [Also in Groups XXII, XXIV and XXX] The bit of a power operated screwdrive comprises a rod 246 hav ing a hexagonal portion 252, a recess 254 for a ball detent on the chucl socket, an enlarged portion 256 for axially lo cating the bit in the socket and a tapped hole 250 for an inter changeable blade 258 The blade has concave depressions 260 on oppo site sides of a diametri cally-extending rib 262 that enters the screw slot.
Patent GB-282593-A (GB)
Title: Wood working machine
IPC: B23Q39/02
Filed: 1927-06-07
Abstract: 282,593. Hepper, K. June 7, 1927. Circular-saw machines.-In a combination woodworking machine a saw 25 and a cutter 26 are carried at opposite sides of a casing 15 containing a driving motor (not shown) connected by belts with the cutter spindles, the casing 15 being rotatable by means of gearing 20, 21 in an outer casing 9 which is pivoted in a bracket 8 attached to a compound slide 5, 6 carried by a pivot bolt 3. The casing 9 is clamped in the bracket 8 by means of sleeves 10 with operating handles 11.
Patent GB-979623-A (GB)
Title: Ultra-high-frequency electron tube
Inventor: SAWADA RYOKA
IPC: H01J25/34
Filed: 1961-04-26
Abstract: 979,623. Velocity-modulated beam tubes. KABUSHIKI KAISHA HITACHI SEISAKUSHO. April 26, 1961, No. 15149/61. Heading H1D. An ultra-high-frequency electron tube comprises an electron gun 43, an electron collector 45, a plurality of cavity resonators 25, 26 immediately adjacent each other in series and so arranged that an electron beam passes through all the resonators in turn, and means for exciting adjacent resonators in opposite phase, adjacent resonators being mutually high-frequency coupled and the electron transit angle through each resonator being such that the beam conductance at the excitation frequency is negative. The electron transit angle in each resonator has a value (2n + ¢)# radians where n is zero or a positive integer. The output may be delivered to a coaxial line, Fig. 5 (not shown), or a harmonic output obtained from an output cavity resonator 32 resonant at a harmonic frequency; in the latter case, the coaxial line 35 is connected to an appropriate load to adjust the intensity of oscillation. An input signal may also be applied to the coaxial line 35. All the cavities are tunable by flexure of wall portions 25a, 26a, 32a. There may be three, four or more mutually coupled resonators, and reference is made to a single cavity resonator arrangement which is stated to be impracticable.
Patent GB-1335257-A (GB)
Title: Oil-soluble mixed copper soap products
IPC: C07C53/126
Filed: 1971-05-17
Abstract: 1335257 Mixed copper soaps TENNECO CHEMICALS Inc 17 May 1971 [1 June 1970] 15217/71 Heading C2C [Also in Division C5] Oil-soluble copper mixed soaps of two structurally different saturated or unsaturated aliphatic monocarboxylic acids, for example straight chain, α-, #-, γ-, 8- substituted branched chain acids, are prepared by simultaneously reacting copper or a copper compound with the acid-group containing compounds. Copper acetate, or sulphate may be used and the acidgroup containing compounds may be acids or salts. Many suitable acids are listed and examples describe the use of 2,2-dimethyl pentanoic and 3,5,5-trimethyl heptanoic; 2- ethyl-4 methyl pentanoic and 3,5,5-trimethyl hexanoic; 4-ethyl-5,5-dimethyl hexanoic and 3,5,5-trimethyl hexanoic; n-nonanoic and 3,5,5- trimethyl hexanoic; 2-ethyl-2-hexenoic and 3,5,5-trimethyl hexanoic; 4-ethyl-5,5-dimethyl hexanoic and 2-ethyl hexanoic; n-nonanoic and 2-ethyl hexanoic; 4-methyl pentanoic and nhexanoic; 4-methyl pentanoic and 3,5,5-trimethyl hexanoic; 2-ethyl butanoic and 3,5,5- trimethyl hexanoic acid mixtures in the preparation of the soaps and of mixed copper 3,5,5- trimethyl hexanoate and copper 4-ethyl-5,5- dimethyl hexanoate or copper nonanoate, or copper caprylate/n-nonanoate soaps. The salts may be dissolved in mineral spirits, a non-polar hydrocarbon solvent or a chlorinated non-polar hydrocarbon solvent and mixed with a fuel oil as a soot-remover additive.
Patent GB-1494153-A (GB)
Title: Preparation of hydroxylammonium salts
IPC: C01B21/14
Filed: 1975-04-15
Abstract: 1494153 Hydroxylammonium salts INVENTA AG FUR FORSCHUNG UND PATENTVERWERTUNG 15 April 1975 [10 May 1974] 15343/75 Heading C1A [Also in Division B1] Hydroxylammonium salts are prepared by the catalytic hydrogenation of nitric oxide in an acid medium maintained at a concentration of at least 2N throughout hydrogenation and in the presence of a Pt metal catalyst containing 15-50 atoms per cent of Se based on the amount of Pt metal. Sulphuric acid is exemplified as a suitable acid media, the hydroxylammonium salt product being and the catalyst may be supported on activated carbon or graphite. The Se containing catalyst can be prepared by suspension of a Pt metal catalyst, supported on activated carbon, in the acid used in the preparation of the hydroxylammonium salt and thence passing first N 2  and then H 2  into the suspension. An aqueous solution of a selenium compound, e.g. SeO 2 , or a solution of the compound in the acid used in the salt preparation is added dropwise to the suspension with stirring and hydrogen addition. Thereafter the hydrogenation of nitric oxide is effected. Other suitable selenium compounds which can be used are the dioxide or selenious acid and its salts.
Patent GB-568200-A (GB)
Title: Improvements in electric power supply systems
IPC: H02M7/62
Filed: 1943-09-18
Abstract: 568,200. Converting. PLESSEY CO., Ltd. (Mallory & Co., Inc., P. R.). Sept. 18, 1943, No. 15358. [Class 38 (ii)] D.C. current at two or more voltages is supplied from a D.C. source 20, 21 by means of a vibrator 36, a transformer 30 with a centretapped primary 29 energized first in one direction and then in the other according to whether a contact 38 or 39 is engaged by the vibratory reed and two secondary windings 31, 32 respectively in series with contacts 41, 42 on opposite sides of the reed. Current thus flows in the winding 31 only when current is flowing in the upper half of the transformer primary and the secondary 31 delivers unidirectional current between points 20 and 45. Similarly, the secondary 32 delivers unidirectional current of another voltage between points 20, 48. A third secondary 33 may, by means of a, rectifier 49, doliver unidirectional current between points 20, 52. The system shown is adapted for use with a D.C. source of either 6 or 12 volts.
Patent GB-1009868-A (GB)
Title: Transistor switching devices
IPC: H03K17/10
Filed: 1962-04-24
Abstract: 1,009,868. Transistor switching circuit. ZAVODY PRUMYSTONE AUTOMATISACE NARODNI PODNIK. April 24, 1962 [April 20, 1961], No. 15460/62. Heading H3T. In order to reduce in a transistor switching circuit the effect of the resistance existing between the emitter and collector of a transistor when conducting and the voltage drop across the emitter and collector of the transistor when the current to be switched through the transistor is zero, but the transistor is rendered conducting four transistors are connected as shown in Fig. 1 across the source of voltage to be switched across the load. In order that current from source 13 flows through load 14, transistors 1 and 4 are rendered conducting by control sources 9, 12 and transistors 2, 3 are blocked by their respective sources 10, 11. If the value of the switched in voltage from source 13 is zero, the collector-emitter leakage current ICE o  of transistors 2, 3 is short-circuited through transistors 1, 4 and source 13 and the voltage drops across transistors 1, 4 will be opposed and only their difference effective to cause an error. If the switched in voltage from 13 has a non-zero value there will be a voltage drop across the conducting transistors 1, 4, the polarity of which is determined by the polarity of the switched-in voltage as well as the difference in voltages due to the leakage currents ICE o . If the control current of each conducting transistor is greater than the switched-in current then the total error is given substantially by the voltage drops due to the leakage currents. In the OFF state of the circuit transistors 1, 4 are blocked and transistors 2, 3 conductive, the leakage currents ICE o . of transistors 1, 4 being short circuited through transistors 2, 3. In the arrangement of Fig. 2 (not shown), the collectors of transistors 1, 2 and 3, 4 are connected together instead of their emitters as in Fig. 1. PNP transistors may be employed. In the embodiment of Fig. 3 a second source of switched in voltage 16 is connected as shown.
Patent GB-475257-A (GB)
Title: Waxed paper container for liquids
IPC: B65D41/04
Filed: 1937-06-04
Abstract: 475,257. Milk &c. cartons. JONES, H. S. HARDIE-. June 4, 1937, No. 15496. [Class 125 (iii)] The thread c around the mouth of a waxed paper carton or container for milk or other liquid, adapted to be engaged by the screw-cap a, is provided by a spirally wound wire which serves also to strengthen the mouth of the container.
Patent GB-380047-A (GB)
Title: Improvements in articulated v-belt drives
IPC: F16H9/16
Filed: 1931-05-28
Abstract: 380,047. Driving-belts. MAURER, A., 28, Promenade, Bad Homburg v. d. H÷he, Germany. May 28, 1931, No. 15618. Convention date, May 31. [Class 80 (i).] The links 10 of V-belts for use with variable-speed cones &c. carry balls on rollers 23 which are rotatable together and upon the pulley grooves with point contact.
Patent GB-1086211-A (GB)
Title: Director system for aircraft
Inventor: PRIESTLEY ERIC
IPC: G05D1/06
Filed: 1963-04-19
Abstract: 1,086,211. Aircraft take-off indicators. ELLIOTT BROS. (LONDON) Ltd. April 17, 1964 [April 19, 1963], No. 15636/63. Heading B7W. [Also in Division G4] An aircraft take-off indicator comprises a cathode-ray tube on which is displayed a spot (91, Fig. 4, not shown) whose position relative to a scale indicates the required pitch control for optimum take-off procedure. A line (60) may also be formed on the screen and may tilt to indicate an angle of bank. The take-off pattern is split into four phases, pre-rotation A, rotation B, pull-up C, and take-off climb D, the phase changes varying the input to the indicator 41 from a computer which combines, in the embodiment of Fig. 2, signals representing constants T 1  (the minimum time to rotate), k 1  (a measure of the maximum permissible pitch rate), V TOC , V R , V RW  (the rotation warning sped, e.g. (VR - 10) knots) and ##R (the required pitch change during rotation) and variables V (airspeed), q and #q. In phase A, a switch 40 supplies a signal representative of (V-V R ) to the indicator, or if V<V RW , (V RW -V R ) When V reaches V RW , therefore, the spot (91) starts to move upwards from the marker (58) and when V=VR, the wiper 42 of the switch 40 moves to contact 51 and a signal representative of the pitch change for rotation ##R - #q is supplied (Phase B). The end of Phase B is indicated when time T 1  has elapsed and switches 24, 24a on the undercarriage legs have closed, the wiper 42 moves to contact 54, and the input, i.e. the command pitch rate, becomes a measure of the acceleration #V and V TOC  - V). The difference between this and the actual pitch rate q, on line 45, is displayed. When V TOC -V=2 or 3 knots, the line 45 is disconnected (Phase D) and if the spot (91) is centred in the marker (56) V rises asymptotically to V TOC . In another embodiment (Fig. 3, not shown) the speeds V R , V 2  and V 3  are computed by an arrangement of cams or their electronic equivalent (65) actuated by a flap angle sensor (64) and by setting up the aircraft weight on a display panel (63). These are also provided a barometric height sensor (61), an attitude reference system (62) having outputs 4, and (heading, pitch and bank angles respectively), and a unit (79) providing a demanded heading angle signal. Signals for indicating the required pitch changes are fed into a computer (88) and differ from those of the last embodiment in that V TOC  is computed in a computer (86) and equals (V 2 +[k 1 (h<SP>1</SP>- k 2 )]) <v3  where h<SP>1</SP> = the climb rate and k 2  is a constant dependent on the climb rate appropriate to V 2 . A noise abatement switch (69) may be operated to vary the constants k 1  and k 2 , to indicate the c'imb procedure appropriate to a reduced thrust. In a turn, the value of V TOC  is reduced by an amount proportional to (g/V2 sin # tan #) which has the effect of increasing the commanded nose-up pitch rate. The output of the pitch demand computer may be fed to an autopilot.
Patent GB-811067-A (GB)
Title: Improvements in straight-bar rib knitting machines
IPC: D04B11/04
Filed: 1956-05-22
Abstract: 811,067. Knitting-machines. MONK (SUTTON IN ASHFIELD) Ltd., S. A., and MONK, S. A. Aug. 21, 1957 [May 22, 1956], No. 15698/56. Class 74 (2). The horizontal needle bar A of a straight-bar rib machine is carried by arms 3 supported at their inner ends by a vertical slide D which is actuated to effect the pressing action of the needles B of the bar A. The outer ends of the arms C are each provided with a pin K which engages in a slot L of a lever E actuated by a cam H through lever G to effect the usual knitting motions of the needles B. The pins K are normally held at one end of the slots L by catches M pivoted at N to the levers E but in the event of it being desired to withdraw and raise the needles B the catches M are raised to release pins K to permit them to slide along the slots L as the needle bar is withdrawn from beneath the sinkers. Thereafter the needle bar can be raised to an inoperative position by pivoting the arms C upwardly, the pins K turning in the outer end of slot L. Alternatively, the pins may be associated with the levers E and the slots with the arms C, the catches being pivoted to the arms C.
Patent GB-108599-A (GB)
Title: Improvements in Appliances for Playing a Game.
Inventor: EWART JOHN STURTON
IPC: A63F3/00
Filed: 1916-11-03
Abstract: 108,599. Ewart, J. S. Nov. 3, 1916. Board games.-A board for playing a war game with playing-pieces of three different values has a number of marked positions connected by three or more lines, along which the pieces are moved, and indicating camp positions 2, headquarters' positions 4, fort positions 5, and open positions 6, arranged as shown. There are two complete sets of positions, and the pieces, which represent privates, sergeants, and captains, are of different sizes and shapes, and have different playing-values. The object of the game is to place a " captain " in the opponent's headquarters' position 4, or to capture the opponent's pieces.
Patent GB-750416-A (GB)
Title: Improvements in or relating to the drying of hides or skins
IPC: C14B1/26
Filed: 1953-06-09
Abstract: 750,416. Drying hides and skins. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). June 8, 1954 [June 9, 1953], No. 15797/53. Class 34(2). [Also in Group VIII] Hides or skins are dried by confining the workpiece between the surfaces of a plane rigid member and a flexible member, one of which is vapour transmissive when wet, and applying heat and vacuum to the workpiece so confined in such a manner as to cause the flexible member to press the workpiece against the rigid member. Preferably the workpiece is confined between the surfaces of a porous plate and a flexible impermeable sheet heat applied to the workpiece thus confined and the vacuum applied to the surface of the porous plate opposite that with which the workpiece is in contact. In the illustrated apparatus the leather to be dried, 23, is supported on a plate 20 made of porous material and covered by a flexible sheet 22 which extends over the leather and contacts the porous plate 20 beyond the periphery of the leather. The plate 20 is spaced from a supporting face plate 10 by a series of cross pieces 30 provided with interconnecting channels 32 and a vacuum is applied to the space below the plate 20 by a vent 36 connected to a pump. A duct 40 supplies hot air to the upper surface of the impermeable flexible sheet 22. Alternatively heating may be effected by infra-red lamps. Shrinkage of the workpiece during drying is prevented by the action of the flexible sheet which holds the workpiece firmly against the porous plate 20. The grain surface of the workpiece is in contact with the impermeable sheet 22. The porous plate 20 may be made of sintered ceramic or metal or of a heavy wire mesh or other rigid perforated surface covered with felt, its essential characteristic being that it is vapour transmissive when wet.