baber/WOPTO huggingface dataset:
Patent GB-527608-A (GB)
Title: Improvements in and relating to lathe and like cutting tools
IPC: B23B27/22
Filed: 1939-04-17
Abstract: 527,608. Lathe &c. tools. SYKES, C., HOBSON, R. S., and METROPOLITANVICKERS ELECTRICAL CO., Ltd. April 17, 1939, No. 11599. [Class 83 (iii)] A lathe, planing or like tool A having a hard alloy cutting tip B is provided with a protecting piece D arranged to prevent chips X, Fig. 3, deflected by the chip breaker C, from impinging upon and damaging the part a<SP>1</SP>, Fig. 4, of the cutting edge which is not in use. The piece D may be attached by screws E, additional holes F being provided so that the piece D may be moved back as the tool is ground away by re-sharpening.
Patent GB-830319-A (GB)
Title: Improvements in or relating to velocity-modulated tubes
IPC: H01J29/94
Filed: 1958-04-11
Abstract: 830,319. Velocity-modulated tubes. SIEMENS & HALSKE A.G. April 11, 1958 [April 11, 1957], No. 11628/58. Class 39(1). In a velocity-modulated tube including an electron beam generating system and focusing means for concentrating the beam close to its axis, in which the preferred operating pressure of 10À8 mm. is not obtained, the gas residue is converted by the electron beam into ions which are concentrated by the focusing means to travel substantially concentrically with and in the immediate vicinity of the axis of the beam in a direction opposite thereto and a plate of getter substance, adapted to be heated, is arranged across the path of the ions. As shown in Fig. 1 the plate 3 of getter substance, which may be zirconium, tantalum, niobium or titanium, may be arranged at the centre of an annular electron-emissive coating 2 on the cathode 1. Alternatively a concave plate of getter substance may be arranged behind a central opening in the cathode. The getter substance may be heated by the cathodeheating means or separate heating means may be provided. In a further embodiment the getter substance 6 is coated on a re-entrant portion of the cathode 1 or this re-entrant portion may consist entirely of the getter substance. If titanium is used as the getter substance with a nickel cathode, a tantalum foil may be inserted between the titanium and the nickel of the cathode to prevent these substances from alloying.
Patent GB-844592-A (GB)
Title: A process for the polymerisation of chloroprene stabilised with phenthiazine
IPC: C08F36/16
Filed: 1959-04-07
Abstract: Chloroprene stabilised with phenthiazine is polymerized in an aqueous medium at a pH of 7-12 and 0-80 DEG C. in the presence of 0,2-2% (based on chloroprene) of formamidine sulphinic acid. The amount of water present may be 80-250 parts by weight per 100 parts of chloroprene.  An emulsifying agent may be present in amounts of 1-10% by weight of monomer, in the examples the sodium salts of disproportionated abietic acid and methylene dinaphthyl disulphonic acid are used.  The phenthiazine may be present in amounts of 0,01-2% based on monomer.  Modifiers may also be used, e.g. C10-C20 alkyl mercaptans, iodoform or dialkyl xanthogene disulphides in amounts of 0,05-7% based on monomer.  Chloroprene may be copolymerized with 0,1-20% by weight, based on total monomers of 2, 3-dichlorobutadiene. Specification 687,299 is referred to.
Patent GB-755880-A (GB)
Title: Improvements in or relating to filler materials for gas cylinders
IPC: C10L3/04
Filed: 1954-04-23
Abstract: A porous filler mass for gas storage containers is obtained from a slurry comprising, in parts by weight; lime 10, water 67 to 187, mineral fibre 1 to 10, silica-consisting of 50 to 60 per cent of finely powdered highly reactive silica the remainder being ground crystalline silica of -0.074 mm. size-10 to 15, and 1.8 to 6.5 of magnesium hydroxide, basic magnesium carbonate, bentonite, aluminium sulphate, sodium aluminate or aluminium hydroxide.  Specification 696,463 is referred to.
Patent GB-1515971-A (GB)
Title: Growing silicon crystals
IPC: C01B33/021
Filed: 1976-03-24
Abstract: 1515971 Crystal growth INTERNATIONAL BUSINESS MACHINES CORP 24 March 1976 [27 May 1975] 11807/76 Heading BIS A process for controlling the oxygen content of silicon crystals which are drawn from a silicon melt contained in a vessel having an interior surface of silica, comprises prior to introducing the silicon charge into the vessel treating at least a portion of the silica surface of the vessel which is to be in contact with the melt, by heat treatment or by roughening, in such manner as to provide an oxygen concentration in the melt during the crystal growing process which is greater than, and an oxygen concentration gradient along the length of the drawn crystal which is less than that which would occur without such treatment.
Patent GB-1208069-A (GB)
Title: Brake control circuit
IPC: F16D59/02
Filed: 1968-03-11
Abstract: 1,208,069. Electro-magnetically controlled brakes. GENERAL ELECTRIC CO. 11 March, 1968 [3 April, 1967], No. 11817/68. Heading F2E. Brake solenoids 10, 12 are energized with halfwave rectified current from an A.C. source 14 to hold off brake shoes (not shown) from a brake drum on an electric motor shaft, when the motor is switched on. The solenoids initially receive a high pull in current via normally closed contacts 20, contacts 26 (which are closed on energization of a relay coil 22), and relay coil 28. After the solenoids have become fully energized, the relay 28 opens contacts 20 and a resistor 18 is inserted in series with the solenoids to reduce the current therein to a minimum level necessary to hold off the brake shoes. On switching off the supply to the motor and solenoid circuit, relay 22 is de-energized and relay contacts 34 open, thereby inserting a resistor 32 in a closed loop discharge current path of solenoid 10 causing it to be de-energized rapidly, thus allowing rapid brake application, while solenoid 12 is discharged through a closed loop including a diode 36 and a conductor 38 and which loop being a lower resistance the discharge of energy from solenoid 12 is slower than that of solenoid 10 resulting in a delayed braking action. Alternatively, the solenoid 12 may be omitted.
Patent GB-202689-A (GB)
Title: Improvements in carburettors
IPC: F02M5/02
Filed: 1922-04-27
Abstract: 202,689. Constantinesco, G. April 27, 1922. Closure members, hinged.- The butterfly throttle valve e of a carburettor is so arranged that it can be inclined in either direction to the vertical according to the direction of air flow. The throttle valve tapers towards the extremities, so that when fully open it forms Venturi passages with the narrowest part of the choke tube and its spindle carries a depending arm actuated by a lever t. The edge of the throttle valve is machined on both sides which meet at an angle of 90‹ so that the valve can close the pipe in either direction.
Patent GB-345126-A (GB)
Title: Improvements in cartridge type fuses
IPC: H01H31/12
Filed: 1930-04-15
Abstract: 345,126. Fusible cut-outs. MATTHEWS CORPORATION, W. N., 3722, Forest Park Boulevard, St. Louis, Missouri, U.S.A. April 15, 1930, No. 11936. Convention date, April 19, 1929. [Class 38 (i).] A cartridge type fuse comprises a tube 41, Fig. 6, of insulating material through which the fuse wire or strip 38 passes and connects to terminal pieces 35 being gripped at its upper end by a set screw 37 and at its lower end bent over to enter a recess 70 in the lower terminal piece and gripped by a set screw 53. Pivoted to the lugs 60,on the lower terminal piece is an insulating member 66 having a channel 68; when the hinged member is shut the exposed portion of the fuse wire is enclosed in this channel by the contiguous tube 41. This fuse cartridge fits into a box 3, Fig. 1, the terminal piece 35 engaging spring clips 29. The front of the box is recessed at 13 for the reception of a hinged lid 15 fitted with detents 21 and the side walls have external projecting lugs to give a longer and more tortuous leakage path. The lower wall 9 is sloping and has a hole 57, bevelled at 61, 59 for the reception of the lower end of the fuse cartridge which is positioned by lugs 55, 56 on projections 51 from the lower terminal piece engaging with the sloping wall 9 of the box and with the lower contact piece 29 respectively. A projection 39 is provided on the upper terminal piece for the engagement of a removal tool. When the fuse cartridge is in position the edge of hole in wall 9 keeps the member 66 and tube 41 pressed together. The door is retained open by the detents 21 which engage with the recess 13 in the box front.
Patent GB-200942-A (GB)
Title: Treatment of xanthorrhoea gums for the production of dyes and stains
IPC: C09B61/00
Filed: 1922-04-28
Abstract: Xanthorrhoea gums are melted and heated to 180 DEG -220 DEG  C. and sulphuric acid (18.4 lbs. per 100 lbs. of gum) is then slowly added and the heating continued; the product is cooled and extracted with ethyl or methyl alcohol.  The alcoholic extract may be used as a stain or varnish.  The crude product is soluble in caustic alakli; according to the Provisional Specification the insoluble residue from the alcohol extraction may be dissolved in caustic alkali and used for colouring soaps, fats, &c. Specification 103,006, [Class 95, Paints &c.], is referred to.ALSO:Xanthorrhaea gums are melted and treated hot with sulphuric acid; the product is cooled, crushed, and extracted with alcohol. According to the Provisional Specification, the insoluble residue from the alcohol extraction may be dissolved in caustic alkali and used for colouring soaps, fats, &c.  Specification 103,006, [Class 95, Paints &c.], is referred to.
Patent GB-396348-A (GB)
Title: Improvements in or relating to the manufacture of photo-electric cells
IPC: H01J40/06
Filed: 1933-04-25
Abstract: 396,348. Photo-electric cells. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. April 25, 1933, No. 12089. Convention date, July 22, 1932. [Class 39 (i).] In the preparation of an alkali metal electrode, excess of alkali metal is removed by providing one or more metals in the cell, outside the photoelectric electrode, and capable of forming an alloy with the excess metal at temperatures below 150‹ C. ; the metals may be (a) in group II B, zinc, cadmium, or mercury or (b) in Group IV B, tin, lead, or germanium. As shown, the anode consists of a hairpin wire 4, and the cathode consists of a layer of silver coated with silver oxide to which a thin layer of caesium 9 is applied. A piece of tin 11 is .secured to a wire 10 sealed in the pinch, or the stem tube 3 may be coated with tin before sealing into the bulb. Mercury may be used in the form of an amalgam such as non-liquid cadmium amalgam.
Patent GB-139365-A (GB)
Title: Improvements in or relating to cream separators
IPC: B04B9/12
Filed: 1919-05-15
Abstract: 139,365. Poyser, G. W. May 15, 1919. Casings.-The casing 6 of a cream-separator is provided with a tongue 5 which passes through a slot 4a in the framing 4 and is slotted to receive a cotter or tapered key 7.
Patent GB-542814-A (GB)
Title: Improvements in and relating to the purification of gases, from sulphuretted hydrogens
IPC: C10K1/20
Filed: 1940-07-27
Abstract: 542,814. Gas-purifying materials. QUARENDON, R., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. July 27, 1940, No. 12231. [Class 55 (ii)] Hydrogen sulphide is removed from gases such as towns gas by passing them through a mass of a substance such as peat containing sulphur bacteria with the addition of a wetting agent such as soft soap, or that known under the Registered Trade Mark " Calsolene."
Patent GB-559706-A (GB)
Title: Baby chairs
IPC: A47D1/10
Filed: 1942-09-01
Abstract: 559,706. Folding chairs; seats for children. GRAHAM, F. E., and WOOD, B. G. Sept. 1, 1942, No. 12295. [Class 52 (ii)] A child's chair for placing on a dining-chair and having a tray in front is provided with a distance piece or transverse rail to space the two chair backs apart and is secured in position by strapping the backs together. The child's chair may have a rigid frame but, as shown, is arranged for folding. The distance piece or transverse rail D may be carried by the arm rests G, The securing strap R, owing to its divergence from the back of the child's chair to the larger dining chair back, tends to centralize the small chair. The seat B is pivoted on front uprights E and rests in notches N in inclined members L so as to lock the structure in its operative position. The upright, horizontal and inclined members are connected by pivots and links so that the chair folds substantially flat.
Patent GB-675259-A (GB)
Title: Improvements in or relating to tread blocks for track shoe structures of endless track vehicles
IPC: B62D55/275
Filed: 1949-09-14
Abstract: 675,259. Vehicular endless track. INTERNATIONAL HARVESTER CO. OF GREAT BRITAIN, Ltd. (International Harvester Co.). Sept. 14, 1949, No. 12314/51. Divided out of 675,220. Class 79(i) A rubber tread block has front and rear portions shaped to provide enlargements adapted to co-operate with inwardly directed flanges of a retaining plate on a track shoe structure of an endless track vehicle, the block being provided at the underside with a slot of dove-tailed crosssection disposed substantially parallel with the front and rear' faces of the block and the side faces of 'the slot converging towards the base of the block. As shown the tread block 1 is formed with a tread face 2, a base face 3, end faces 4 and front and rear faces 5. Portions 5a of the front and rear faces extend angularly therefrom to provide the enlargements adapted to fit closely, but slidably in an endwise direction, against the convergent faces of the inwardly directly flanges of the track shoe structure shown in Specification 675,220. The tread block is formed at the underface with the dove-tailed slot 7, the part 7a of which extending substantially to or above the junctions of the portions 5a with the faces 5. The slot 7 is adapted to receive endwise a clamping bar of keystone section, which bar is drawn downwardly by bolts to press the portions 5a against the convergent flanges. In a modification the slot 7 may be discontinuous, the clamping bar being then in two or more parts.
Patent GB-911959-A (GB)
Title: Improvements in or relating to the stabilisation of polymers
IPC: C08G2/32
Filed: 1961-04-06
Abstract: An aldehyde polymer is treated, in solution in an anhydrous liquid reaction medium which is a polyacetaldehyde solvent, with pyridine or a derivative thereof and the polymer separated out using an aqueous alkaline solution.  A second treatment, using a carboxylic anhydride, e.g. acetic anhydride in the presence of pyridine may also take place.  Sodium carbonate or bicarbonate may be the alkaline medium, and pyridine or its derivative the solvent while a catalyst, sodium acetate, may be present in the acetylation.
Patent GB-939941-A (GB)
Title: Improvements in or relating to the manufacture of derivatives of 5-nitrofuran
Inventor: JACK DAVID
IPC: C07D405/12
Filed: 1959-04-14
Abstract: The invention comprises compounds of the formula <FORM:0939941/IV(a)/1> wherein R and R1 represent hydrogen atoms, alkyl or aryl groups, one but not both of R or R1 being a hydrogen atom; and the preparation thereof by condensing 5-nitrofurfuraldehyde or its diacetate with an appropriate 3-amino-hydrouracil, or by treating a semicarbazone with a substituted acrylic or b -haloacetic ester, having an alkyl or aryl substituent on the a - or b -carbon atom, in the presence of an alkaline condensation agent in alcoholic solution and then acidifying the reaction mixture and treating it with 5-nitro2-furfuraldehyde or its diacetate.  Included in the invention is a variant of the latter process in which the semicarbazone is acetone semicarbazone and in which, after the acidification, the reaction mixture is treated with benzaldehyde and the resulting 3-benzylideneamino-dihydrouracil is isolated and hydrolysed before further treatment with 5-nitrofurfuraldehyde.
Patent GB-846018-A (GB)
Title: Detection system
IPC: G08B13/26
Filed: 1957-04-17
Abstract: 846,018. Burglar-like alarms. MONROE CALCULATING MACHINE CO. April 17, 1957 [July 13, 1956], No. 12595/57. Class 118 (1). [Also in Group XXXVI] A system for detecting the approach of bodies from an unauthorized direction comprises a conductor 20, Fig. 1, mounted parallel to the ground and shielded longitudinally to prevent accidental operation by, for example, animals and authorized persons, and an amplifier 22 arranged to keep the shield at substantially the same potential with respect to the ground as the conductor. The circuit responsive to the comparatively rapid change of capacitance due to an intruder may be made unresponsive to slow changes due to the growth of vegetation, atmospheric conditions &c. The responsive circuit may be a normally balanced bridge 23 or an oscillator 231, Figs. 5 and 6, having its frequency determined by the capacitance of the protective conductor to ground and measured by a heterodyne method. Maintaining shield and conductor at the same potential. As shown, Fig. 4, the capacitance between the protective conductor and its shield is tuned to the energizing frequency by the primary 29 of a transformer and any alternating potential differences is applied to an inverter 51, the output of which is rectified and applied as a bias to a pentode 38 forming the load resistor of cathode-follower pentode 36 forming the output stage of amplifier 22 so as to increase the gain of the amplifier. The output of the latter acts in opposition to the potential difference across 29 and so maintains the conductor and its shield at the same potential. The effect of the capacitance of the shield to ground is neutralized by a tuning inductor 31. Compensating for slow changes in the capacity of the protective conductor to ground. In Fig. 4 the bridge output after amplification may be applied over lead 76 to the input of the phase inverter so that amplifier 22 acts also to keep the bridge effectively in balance. The time constant of the amplifier is such that this action does not prevent the operation of the alarm in the presence of an intruder. In the modification shown in Fig. 5, in which change in capacitance is detected by the change in beat frequency of a heterodyne system, the effect of slow variations can be eliminated by the provision of a slow acting A.F.C. control 251 tending to keep the beat frequency constant. In the system shown in Fig. 6 in which the conductor is sectionalized and conditions in adjacent sections are compared, compensation is inherent since such sections can be assumed to be affected in the same way by long-term changes.
Patent GB-641037-A (GB)
Title: Machines for making high frequency cables
IPC: H01B13/18
Filed: 1948-05-07
Abstract: 641,037. Cable-making machines. DEHN, S. G. (Soc. Anon. de Telecommunications). May 7, 1948, No. 12621. [Class 36] A machine for cutting out and placing insulating discs on conductors of single or multi-core high frequency cables includes a punch die 5 and a turntable 2 having perforations 3 therein to receive the discs and carry them round to a position where they can be transferred to the conductor. A strip 4 of insulating material such as polythene is fed into the machine and discs are cut therefrom by die 5 and pushed up into a perforation 3 while the turntable 2 is stationary. The turntable 2 then moves forward a step, the die 5 being withdrawn to allow the strip 4 to move forward. A second disc is punched while the first'one is opposite a punch 6 which makes a central hole in the disc. The disc continues step-by-step in the turntable until it reaches a fixed die 8 and punch die 9 which pushes the disc out of the turntable, past a knife 15 which slits it radially, and into a receptacle 12. The receptacle 12 then moves across to force the disc on to a moving conductor 18 which is fed through the axial bore of a pusher 19. The pusher moves along with the disc for a short distance and serves to straighten it on the conductor. A second turntable with associated dies may be arranged to apply discs cut from an insulating strip 4<SP>1</SP> alternately with those cut from strip 4, both sides of the machine being driven from a common shaft 16 with 180 degrees difference, so that they operate alternately. A modified form of machine is described (Fig. 4, not shown), which applies suitably punched discs to multi-conductor cables. In this case the discs are punched out having the same number of slits as there are conductors, as in Fig. 3, and are fed into the central space between the conductors while the conductors are held apart. When the disc is in position the conductors close thereon forcing themselves into the slits. As before, a pusher is provided to travel along with the disc for a short distance. Specification 616,896 is referred to.
Patent GB-1039555-A (GB)
Title: Hold-open devices for hinged doors
Inventor: DRURY CYRIL JOHN
IPC: E05C17/52
Filed: 1964-03-25
Abstract: 1,039,555. Door holders. PRESSED STEEL CO. Ltd. June 23, 1965 [March 25, 1964], No. 12727/64. Heading E2A. A door post 12 and door are connected by hinge leaves 11, 13 and the door is held open by a portion 15 projecting from the end of the leaf 13 and which engages the resilient hook portion 20 of a torsion bar 16 mounted to pivot on the door post. The torsion bar engages in a recess in part of the leaf 11. In a modification the end of the leaf 13 carries a roller, and the leaf 11 provides a stop therefor to prevent the roller engaging the torsion bar until the door is more than half open.
Patent GB-1041884-A (GB)
Title: Improvements relating to door handles
Inventor: CASTRO PETER
IPC: E05B1/00
Filed: 1964-03-26
Abstract: 1,041,884. Door handles. JAMES COLLINS (BIRMINGHAM) Ltd. March 4, 1965 [March 26, 1964], No. 12802/64. Heading A4U. A door handle with end portions 12, 13 and a strap portion extending between them has in the upper end portion an inclined recess 14 which when the handle is in position receives and encloses a complementary block 15 secured to the door by screws, the lower end part having a countersunk bore to receive a fixing screw which enters the door.