baber/WOPTO huggingface dataset:
Patent GB-872105-A (GB)
Title: Rare earth metal salts and their preparation
IPC: C01F17/00
Filed: 1958-04-17
Abstract: Rare earth metal salts of formula MRX4 where M is sodium, potassium or ammonium, R is one or more rare earth metals and X is a halogen, are prepared by fusing a rare earth metal halide with a halide of sodium, potassium or ammonium.  Rare earth chiefly concerned are Ce, La, Nd, Pr, Sm and Gd.  According to Examples, (1) a natural mixture of rare earth metal chlorides was treated with sodium fluoride and the precipitated fluorides were washed, dried and ground and then mixed with sodium fluoride in a molar ratio of 3:1 fused at temperatures rising to 1285 DEG C.  Excess sodium fluoride was removed by washing and the product contained double fluorides and in particular NaCeF4.  (2) An equimolar mixture of cerium fluoride and sodium fluoride was fused at 1400 DEG C. to form NaCeF4.  This double fluoride may be employed as an additive to copper and as an isomerisation or polymerization catalyst for aliphatic hydrocarbons. Thus sodium cerium chloride may be added to octene-1 and the mixture refluxed. On fractionation a polymerized product having a higher refractive index is obtained.ALSO:Double fluorides of rare earth with sodium potassium or aluminium and in particular NaCeF4 may be employed to improve the grain structure of copper.  For example sodium cerium fluoride of formula NaCeF4 may be added in amount up to 1% to copper which is melted at up to 1200 DEG C., cast and cooled. The copper obtained has a fine grain structure, an increased Rockwell hardness and an increased tensile strength.
Patent GB-527936-A (GB)
Title: Improvements in or relating to electric signal transmission systems
IPC: H04B3/20
Filed: 1939-04-24
Abstract: 527,936. Repeating arrangements ; automatic volume control. ELECTRICAL RESEARCH PRODUCTS, Inc. April 24, 1939, No. 12225. Convention date, April 28, 1938. [Class 40 (iv)] In a system having a four-wire section provided at either end with a volume compressor in the transmitting channel and a volume expander in the receiving channel, each comprising a voltage-operated impedance network, the control circuits are interconnected so that an increase of gain in the receiving channel is accompanied by a reduction of gain in the transmitting channel in order to avoid singing. As shown, the compressor 19 comprises a rectifier bridge 33, while the expander 22 comprises series rectifiers 46, 48 shunted by resistances. The compressor is subject to a backward control from the output of an amplifier 40 through a rectifier bridge 21, and the expander is subject to a forward control through 'a rectifier bridge 24. Condensers 43, 41 in association with resistances provide a delay in the controls. In Fig. 2, the outputs of the bridges 21, 24 are directly connected together, so that current in either control circuit reduces the gain of the compressor and increases that of the expander, and there is no increased tendency for the system to sing. In this arrangement, when the transmitting channel is in use, the noise which reaches the talker over the receiving channel is increased. This effect is obviated in the modification in Fig. 3 by the provision of a rectifier 55 in the connection between the bridges 21, 24 to prevent the control of the expander from the transmitting channel. In addition a battery 60 is inserted to provide a bias which must be overcome before the compressor can be affected by current from the receiving channel. This is advantageous when the noise level is high.
Patent GB-183917-A (GB)
Title: Apparatus for levelling flexible cords or lines
IPC: E04G21/18
Filed: 1921-04-29
Abstract: 183,917. Gwilliam, F. G. April 29, 1921. Levels.-For levelling a flexible line or cord, a spirit-level 3 is pivoted centrally at 5 to a base frame 1 to which one end of the line is anchored, while the other end passes over the pivot pin and close to the underside of the level and out through a hole 16 in the end of the frame, so that when this end is pulled tight it can be raised or lowered . to centre the bubble. The line is wound on a drum 6 fitted with ratchet mechanism for preventing further rotation when the desired length has been unwound, and passes around a spring pulley 11 to ensure tautness. To enable the device to be used as an ordinary spirit-level, screws 19 are provided for locking the level 3 against pivotal movement.
Patent GB-1163477-A (GB)
Title: Improvements in and relating to Transfer Printing
IPC: B44C1/17
Filed: 1967-03-16
Abstract: 1,163,477. Transfers. TRENTESAUXTOULEMONDE. 16 March, 1967 [16 March, 1966], No. 12319/67. Heading B6C. A temporary support for a transfer printing process comprises an aluminium foil coated on at least one surface with a release coating of ethyl cellulose, and a design printed thereon. The transfer printing process comprises coating an aluminium foil with ethyl cellulose on at least one surface, printing a design on to the ethyl cellulose, superimposing the so-obtained temporary support and a final support, applying heat and/or pressure to the superimposed structure, and separating the temporary support from the final support which retains the printed design, the adherence of the material of the design to the temporary support being lower than its adherence to the final support. The final support may be a plastisol which is spread on to a prepared temporary support and allowed to gel before being separated from the temporary support. The ethyl cellulose release coating may include up to 10% by weight of octyl adipate. The aluminium foil may be backed with paper or a cellulosic or plastics film, for example of polyethylene or polypropylene. The design is preferably printed in inks based on vinyl resins, particularly copolymers of vinyl chloride and vinyl acetate. Examples of ink compositions are given, and include dispersions in vinyl resins of metals, titanium dioxide and numerous organic materials. A protective varnish may be applied to at least parts of the temporary support before the design is printed thereon, the varnish being transferred with the design. A transfer may be incorporated in a mould during moulding articles from plastisols. The design may be printed in multi-colour.
Patent GB-1409263-A (GB)
Title: Neutron beam collimators
IPC: G21K5/08
Filed: 1972-03-16
Abstract: 1409263 Collimating neutron beams; moderating neutrons; neutron shielding ELLIOTT BROS (LONDON) Ltd 23 Feb 1973 [16 March 1972] 12373/72 Headings G6P and G6R A neutron beam collimator comprises a body containing tungsten, for moderating neutrons by inelastic collisions, a flow neutron absorber in intimate admixture with the tungsten to reduce collisions of slow neutrons therewith, and hydrogenous material for further moderating the neutrons by elastic collisions to reduce them to thermal energies and for capturing thermal neutrons, and a material having a density of at least 10 gm./cm.<SP>3</SP> for attenuating γ-radiation arising from the neutron capture, the body including a bore to define the cross-section of the emergent beam. In one embodiment (as shown), the collimator 24 comprises a matrix 40 in three layers 34, 36, 38. Layer 34 comprises tungsten powder mixed with boron carbide powder; layer 36 comprises polyethylene granules and may also contain boron carbide mixed with the matrix bonding agent, e.g. epoxy resin, or forming a coating on the granules; and layer 38 comprises lead shot or powder. In a modification, layer 38 comprises solid lead. In another modification, lead may form the bonding agent of layer 34. In a further modification, nickel powder is added to the layer 36. In a second embodiment (Fig. 3, not shown), the matrix 40 contains a uniform dispersion of the loading materials previously mentioned in relation to Fig. 2. The collimator is intended for use with a neutron radiation therapy apparatus (Fig. 1, not shown) in which a neutron source (10) is surrounded by a shield (12) comprising an inner layer (14) of iron which slows down primary (15 MeV) neutrons by inelastic collisions, an intermediate hydrogenous layer (16) of polyethylene and boron carbide which, by elastic collisions, moderates the neutrons to thermal energies, the latter then being captured, and an outer layer (20) of lead to attenuate γ-radiation produced in the neutron capture processes. The outer layer (20) overlies a stainless steel casing (18) which contains the intermediate layer.
Patent GB-1480440-A (GB)
Title: Method of manufacturing the second of a pair of reproduction masks for use in the manufacture of a shadow mask
IPC: H01J9/14
Filed: 1975-03-25
Abstract: 1480440 Colour television tubes PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 25 March 1975 [28 March 1974] 12379/75 Heading H1D [Also in Division B3] A shadow mask for a colour TV tube produced using a pair of reproduction masks and photographic techniques (see Division B3) may be of 0À15 mms. thick iron sheet with vertical rows of elongate apertures (Fig. 2, not shown), cross-sections at right angles to and along the rows of apertures being as shown in Figs. 3 and 4 respectively. The aperture widening in the screen direction prevents electron collisions which might liberate secondary electrons.
Patent GB-946890-A (GB)
Title: Guide tracks for tentering machines
Inventor: WATERMAN JOHN EVERETT
IPC: D06C3/00
Filed: 1962-03-30
Abstract: 946,890. Tentering-machines. WINSOR & JERAULD MANUFACTURING CO. March 30, 1962, No. 12385/62. Heading D1S. A tentering machine comprises two main track portions to guide the links of a chain comprising plates 15, 16 hinged together and track guides 25, 26 on the plates; a number of shorter track sections 31, 32, 33 to guide the chain links, the sections 33, 31 being pivoted at 65, 54 respectively to the track guides 25,26 respectively; a bar 73 pivoted to the plates 15, 16; and pivot pins 37, 44 between the sections 31, 32 and 32, 33 respectively having a pivot bearing in the bar 73. The plate 16 is secured to a disc 17 by screws 17<1> and is cut away at 18 to receive an arcuate portion 19 of the plate 15 pivoted to the disc 17 by a pin 20. The disc 17 is mounted on a block 22 in which a screw shaft 24 is threaded, the shaft 24 being rotatable to adjust the angular position of the plates 15, 16. Each of the sections 31, 32, 33 has ears 34, 35 extending therefrom, Fig 3. The sections 31, 32 and 32, 33 are pivoted together and to the bar 73 by pins 37, 44 respectively secured by screws 42, 45 respectively. The section 31 is secured to the track 26 and the section 33 is secured to the track 25 by pins 52, 59 respectively held by screws 54, 65 respectively engaging the plates 16, 15 respectively. Posts 67, 70 are pivoted to the plates 15, 16 respectively and to the bar 73, a slot 78 permitting sliding movement of the bar 73 about the post 67. On rotation of the shaft 24 the angle between the plates 15, 16 is split into four equal increments by the sections 31, 32, 33 to provide a gradual angle change for the fabric selvedge.
Patent GB-600030-A (GB)
Title: Improvements in or relating to pressure reducing valves
IPC: G05D16/06
Filed: 1945-05-17
Abstract: 600,030. Pressure - regulating valves. TALLEY, F. B. May 17, 1945, No. 12397. [Class 135] A pressure-reducing valve for use, e.g. in administering anaesthetics, comprises a casing 8, Fig. 1, having inlet and outlet passages 13, 16 respectively and provided with a nozzle 18 which coacts with a valve closure 10 carried by a member 9 attached at its upper end to a collar 5. Between the collar 5 and a cupshaped member 19 is secured a diaphragm 6 whose periphery is held between the casing and a ring 3 provided with lugs 2 which engage the arms of a leaf-spring 1, Fig. 3, secured to a nut 7 on a bolt 4 having a plain part slidable in the member 19. In operation, the valve is opened by the inlet pressure assisted by the leaf-spring, the loading of which may be adjusted, and closed when the outlet pressure acting on the underside of the diaphragm exceeds the opening pressure.
Patent GB-611259-A (GB)
Title: Improvements in or relating to liquid meters
IPC: G01F3/12
Filed: 1946-04-25
Abstract: 611,259. Liquid meters. AVERY-HARDOLL, Ltd., and FRASER, J. April 25, 1946, No. 12514. [Class 69 (ii)]- In a liquid meter comprising a number of flexible metal bellows arranged with their axes equidistant from a common centre, the bellows are operatively interconnected by a wobble plate and are connected alternately to inlet and delivery by a valve device actuated by the movement of the wobble plate. The meter body comprises upper and lower cases 10 and 11 separated by a partition 12. The bellows 14 are fixed to the partition and are connected by rods 21 to the dome-shaped wobble plate 24 secured to a spindle 28 mounted in a cup bearing 32 on a screwed stem 55 movable to raise or lower the bearing 32 to change the angle of inclination of the wobble plate and therefore the stroke of the bellows. Mounted on the partition 12 is a distribution block 35 having passages leading into each bellows, a port 36, and a central port leading into the lower casing 11. A valve member 41 on the spindle 28 rests on the block 35 and, due to the movement of the wobble plate, performs a circular sliding motion, being restrained against rotation. The spindle 28 projects into a fork 52 on a spindle 53 which is connected to the counting mechanism (not shown). The wobble plate engages a track 34 machined to give a slight dwell at the end of each stroke of the bellows, the plate being kept in alignment by projections 47 engaging in notches 51 on the track. Liquid under pressure is fed to the upper casing 10, passes through the valve into the bellows which it causes to expand, thus causing motion of the wobble plate and expelling liquid from the other bellows which is connected by the valve to the lower casing and thence to delivery.
Patent GB-528386-A (GB)
Title: Improvements in and relating to tension devices for use in winding textile threads
IPC: B65H59/32
Filed: 1939-04-26
Abstract: 528,386. Thread-tensioning arrangements. COURTAULDS, Ltd., DIAMOND, C., and WILSON, L. G. April 26, 1939, No. 12525. [Class 120 (ii)] A tension device for use in winding threads comprises two carriers each carrying a number of guides, one of the carriers 8 being fixed and the other 13 being pivoted at its lower end 14 and inclined to the vertical on the side of the pivot reserve from the fixed carrier so that when the thread is passed in a zigzag path around and between the guides 9... 12 and 15, 16, 17, movement of the pivoted carrier towards or away from the vertical caused by an increase or decrease respectively in the thread tension, correspondingly reduces or increases the friction exerted by the guides on the thread to counteract the increase or decrease in tension. As shown a movable weight 18 is attached to the pivoted carrier 13 so that its initial position may be varied, e.g. so that the angle it makes with the horizontal is approximately the same as the angle between the zigzag portions of the thread 1. Specification 25709/01, [Class 120], is referred to.
Patent GB-355312-A (GB)
Title: Improvements in spinning machines for facilitating doffing
IPC: D01H9/04
Filed: 1930-04-23
Abstract: 355,312. Spinning - machine doffing arrangements. HAIN, M., 121, Park Street, Montclair, New Jersey, U.S.A. April 23, 1930, No. 12530. [Class 120 (ii).] I n spinning - machines wherein one or more bobbin rails are adapted to be moved to and from the spinning position, for example, for doffing purposes, a bobbin rail is mounted for movement about a horizontal axis in a structure which is itself movable about a horizontal axis, and automatic means is provided positively to turn the rail during the turning of the structure to cause it to maintain a determined relationship thereto. As shown, bobbin rails 16 are so arranged that, upon rotation of a support 12 to change their positions, they are maintained, as by sun-and-planet gearing, or by intermittently-operating or other gear, in a horizontal position. The rails 16 mounted on shafts 14a in the support 12 which is in the form of a disc secured with similar discs 13 on shafts 11 carried by arms 3a of the lifting bracket 3. Pins 19 projecting from the disc 13 engage with a diametrical groove in a rotary disc 18 so that, when the discs 12, 13 and the plates are lowered for doffing to the position shown in Fig. 2, they may be rotated by a handle 21a and a gear 21 engaging with the disc 18, the gearing of the pinions 14 on the shafts 14a with a central fixed pinion 10 maintaining the plates with the bobbins vertical. The operating- gears at each end of the frame are coupled by a shaft 18x. The groove in the disc 18 serves also to prevent the bobbin rails from turning during the normal traverse. Instead of pinion gearing, the axles of the plates may be provided with star wheels adapted to engage fixed stops when the support is rotated, whereby intermittent rotation is imparted thereto to maintain the plates in the desired alignment; in this arrangement the operating gear corresponding to the disc 18 and gear 21 is carried by the lifting-bracket. In another form the necessary planetary movement is effected by slotted levers secured to the axles of the plates and engaging fixed studs on the framework.
Patent GB-571736-A (GB)
Title: Dehydrogenation of butenes to butadiene
IPC: C07C5/327
Filed: 1943-08-04
Abstract: In the manufacture of butadiene by thermal non-catalytic dehydrogenation of a butene, a hydrocarbon mixture comprising predominantly C4 hydrocarbons and containing a substantial amount of a normal butene is heated to a dehydrogenating temperature by mixing with a separately heated inert gas having a temperature substantially above that of dehydrogenation, and rapidly quenching the resulting product.  A suitable feed may be prepared by dehydration of butyl alcohol, dehydrohalogenation of chlorbutane or, preferably, by treating a C4 fraction of cracked gas with cold sulphuric acid to remove isobutene, contacting with warm acid to isomerize butene-1 to butene-2, and separating the olefin from paraffins by extractive distillation. The butene feed is preheated to below about 550, preferably 450-550 DEG  C., an inert gas such as hydrogen, methane, ethane, steam, carbon dioxide or nitrogen is heated to about 700-1200, generally 800-1000 DEG  C., and mixed rapidly therewith to give a temperature above 600, preferably 650-850 DEG  C.  The time of reaction varies and is chosen to give a conversion of 5-85 per cent of the butene in the feed.  Contact with ferrous metals or iron oxides is avoided, heated surfaces preferably being of copper alloys or ceramics.  Pressures are about atmospheric or below, preferably not substantially above 100-150 lbs./sq. in.  The products are rapidly quenched by admixture with a cold fluid such as water or hydrocarbon which is inert and easily separable to lower the temperature to below 450, preferably 400-300 DEG  C. Butadiene and, if desired, a butene fraction for recycling may be separated from the products.  Butene-1 may be isomerized to butene-2 before recycling.
Patent GB-120019-A (GB)
Title: Improvements in the Manufacture of Boot Tips.
Inventor: WATSON ALGERNON CHARLES
IPC: B21D53/38
Filed: 1918-08-03
Abstract: 120,019. Watson, A. C. Aug. 3, 1918. Small plates, metallic.-In the manufacture of boot tips of the kind shown in Fig. 6, the inner edge 10 is cut out simultaneously with the bending up of the flange 4. The tips are stamped from a strip of sheet metal in a press, the ram of which carries one set of tools for piercing the strip for the nailattaching holes and another set for dieing, as described in Specification 120,020. According to the present invention, the strip is positioned above a spring-supported bed 7 in the lower tool 6 of the dieing-out set, the upper tool 1 of which is formed with a concave edge 5 for cutting out the edge 10 of the tip and with the necessary clearance at the edge 3 for bending up the flange 4. The bed 7 serves to eject the finished tip from the lower tool 6. The lower face of the tool 1 may be formed with a slight convexity and the bed 7 with a slight concavity to produce a dish-shaped tip.
Patent GB-686590-A (GB)
Title: Improved shaking grate for boilers and other heating devices
IPC: F23H9/04
Filed: 1949-08-18
Abstract: 686,590. Furnace grates. SOC. FRANCAISE DE CONSTRUCTIONS MECANIQUES ANCIENS ETABLISSEMENTS.CAIL. Aug. 18, 1949 (Aug. 20, 1948], No. 12707/52. Divided out of and addition to 686,544. Class 51 (i). In an improvement in or modification of the shaking grate according to the parent Specification a sloping plate 38 forming the bottom of the fuel hopper 37 is secured to the oscillating grate 36 by lateral brackets 39 forming an observation opening 41 closable by a door 40. A register 42 controls the passage of fuel from the hopper 37 and a clinkerarresting device 12 the depth of the fuel bed. In the embodiment shown in Fig. 2, the pneumatic drive for the grate 47 incorporates a rotary distributer 43 which connects the pipe 45 alternately to a conduit 44 supplying compressed air or steam and to a waste pipe 48 whereby the grate 47 is at first drawn against the pressure of a spring 49 and then released sud-. denly until a shoulder 50 of the piston 46 strikes the cylinder cover 51.
Patent GB-1241788-A (GB)
Title: Chlorophenyl siloxanes and their use as solvents for chemiluminescent materials
IPC: C07F7/08
Filed: 1970-03-17
Abstract: 1,241,788. Chlorophenyl siloxanes. DOW CORNING CORP. 17 March, 1970 [17 April, 1969], No. 12726/70. Heading C3S. [Also in Divisions C4/C5] Chlorophenyl siloxanes of the formula in which x is 1 to 4 and R is methyl or phenyl, are prepared by cohydrolysing methoxysilanes of the formula with ClSiCH 3 R 2 . The compounds are useful as solvents for chemiluminescent materials such as bis(2,4,5 - trichloro - 6 - carbobutoxyphenyl)- oxalate.
Patent GB-665319-A (GB)
Title: Improvements in and relating to ward-leonard systems
Inventor: EVANS OWEN THOMAS
IPC: H02P7/34
Filed: 1949-05-12
Abstract: 665,319. Control of D.C. motors. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. May 2, 1950. [May 12, 1949] No. 12728/49. Class 38 (iii). [Also in Group XXXV] The speed of the motor M1, supplied from the generator G of a Ward-Leonard set, is maintained constant at a value determined by the setting of a potentiometer P2, which, via transductors TD4, TD5, controls the voltage across resistor R8. This is compared with the output voltage of a tachometer generator TG, (or the back e.m.f. of the motor) and the resultant voltage is connected through rectifier ARX to control via transductors TD6, TD1, TD2, TD3, the output of a gried controlled rectifier R which supplies the field GF of the generator G. Contactors in all circuits ensure correct polarities when the motor is reversed. Rectifier ARX provides regenerative braking, since if the control voltage is reduced to a value below the tachometer voltage, the rectifier blocks and the rectifier R is cut off. The rates of acceleration and retardation are controlled by transductors TD9, TD10, which modify the reference voltage across resistor R8 by being energised via a condenser C according to the rate of change of reference voltage at P2. Additional limitation of the motor armature current is provided by transductors TD7, TD8, which are energised via rectifiers ARY, ARZ, according to the voltage drop across the series fields of the generator and motor, and which modify the output of transductor TD6. The input current to the AC motor M2 may be limited by a further transductor similar to TD7 energised from a current transformer in the A.C. supply line. In a modification, transductors TD7, TD8 have auxiliary control windings responsive to the rate of change of tachometer voltage and transductors TD5, TD9, TD10 are omitted. Specification 580,005, [Group XXXV], is referred to.