baber/WOPTO huggingface dataset:
Patent GB-669774-A (GB)
Title: Improvements in or relating to prism systems
IPC: G02B27/14
Filed: 1949-05-31
Abstract: 669,774. Optical systems. LEITZ, E. May 31, 1949 [Nov. 1, 1948], No. 14587/49. Class 97 (i). In a prism system which comprises a prism having a partially reflecting surface for splitting a light beam incident thereon and image erecting means, the image erecting means in the path of one split beam is a Porro system of the first kind, the image erecting means in the path of the other split beam is a Porro system of the second kind and the partially reflecting surface of the beam splitting prism acts also as a reflecting surface of one of said Porro systems. In the system shown in Fig. 1, the prisms 2 and 6 constitute a beam splitting cube, the prisms 1, 2 and 3 comprise the Porro system of the first kind and the prisms 1, 3 and 5 comprise the Porro systems of the second kind and emergent beams A and B are parallel to the incident beam C. In order to make the optical parts of the beams A and B equal a glass block a is positioned in the path of beam A. Prism 1 may be omitted and, in such a case, a prism is placed immediately below the glass block a and another prism is placed below the prism 5. If, it is desired that the emergent beams be inclined at an angle to the incidentbeam, the latter may first pass through a prism having three internally reflecting surfaces - as described with reference to Fig. 5 of- SpeÚification 11556/99, [Class 97]. Various other forms of prism system are described. Fig.- 6 illustrates a microscope in which light from the objective 8 is incident on a prism 9 so that it is deflected through an angle of 45 degrees before striking the beam splitting surface of the prism system 10. The emergent beams pass through two rhomboidal prisms 11, 12 so that the distance therebetween is made equal to the interocular distance.
Patent GB-131749-A (GB)
Title: Improvements in and relating to Automatically Controlled Heaters for use with Incubators or the like.
Inventor: GODFREY EDWARD LEE
IPC: A01K41/02
Filed: 1918-09-09
Abstract: 131,749. Godfrey, E. L. Sept. 9, 1918. Hatching and rearing appliances. - An oillamp-heated incubator or the like of the type in which the height of the lamp flame is controlled automatically by the operation of an expansible capsule within the incubator is provided with means whereby on the return of the lamp after removal for trimming the controlling means for the flame is automatically connected to the lamp. The capsule moves a rod D connected to a link F carrying at its lower end an L-shaped members L, J having a slot N between its two arms. On sliding the burner back to position after removal, the crank B operating the wick strikes the top of the arm J and moves along it into the slot N. The L-shaped member may have a forward extension 0 to engage the upper surface of the oil container and thus to position the arm J ready for engagement by the crank. In a modification, the crank B carries a slotted plate or a wire bent to form a slot, in which slot the end of the rod F engages. The lamp can then be withdrawn the length of the slot without disconnecting the rod.
Patent GB-640368-A (GB)
Title: Improvements in or relating to process for the decomposition of hydrocarbons
IPC: C01B3/40
Filed: 1947-06-03
Abstract: Sulphur-containing hydrocarbons are passed over a nickel catalyst at a temperature greater than that required to obtain the same percentage of hydrogen from a similar sulphur-free hydrocarbon, and under similar other reaction conditions.  The sulphur content exceeds 0.5 per cent by weight and the temperature increase is from 75 DEG to 125 DEG  C.  Catalysts used include nickel-magnesia; nickel-magnesia-zirconium silicate; nickel - alumina - magnesia; nickel - zirconium silicate; nickel-alumina; nickel-diaspore; nickel-pumice and nickel-titanium oxide, the nickel being 10 per cent or more of the catalyst.
Patent GB-919925-A (GB)
Title: Coating compositions
IPC: B23D53/12
Filed: 1961-04-24
Abstract: A coating composition comprises solvent, and, as the essential film-forming materials (A) 100 parts by weight of at least one copolymer of (1) from 95,1 to 70 parts by weight of methyl methacrylate and (2) from 5 to 30 parts by weight of at least one ester of methacrylic acid with a 10 to 22 carbon-atom alkanol and (B) from 4,9 to 30 parts by weight of lacquergrade nitrocellulose. Preferred compositions comprise 90 to 80 parts by weight of methyl methacrylate and 10 to 20 parts by weight of at least one ester of methacrylic acid with a 10-22 carbon-atom alkanol, especially a 12-18 carbon-atom alkanol, and 10-20 parts by weight of lacquer-grade nitrocellulose.  The copolymer may have a relative viscosity of 1,117 to 1,196, determined in 0,5% solution in ethylene dichloride at 25 DEG C., and may be a copolymer of methyl methacrylate with lauryl methacrylate, stearyl methacrylate, decyl, hendecanyl, tridecanyl-, myristyl-, pentadecanyl-, palmityl-, arachidyl-, behenyl-, 10-methyl hendecanyl-, and 2-ethyl lauryl methacrylates and mixtures thereof. Minor proportions of other polymerizable materials, e.g. methacrylic acid or other esters thereof can also be polymerized with the essential constituents of the copolymers. Polymerization is effected by known methods of polymerizing methyl methacrylate monomer in bulk, solution or granular form, preferably in solution at temperatures up to about 150 DEG C. in the presence of a free radical catalyst, e.g. benzoyl peroxide, azo bis(isobutyronitrile), or ditertiaryl butyl peroxide.  Specified plasticizers include benyl butyl phthalate, dibutyl phthalate, tri phenyl phosphate, 2-ethylhexyl benzyl phthalate, di(cyclohexyl) phthalate, butyl cyclohexyl phthalate and mixtures thereof.  From 10-60%, preferably 25-45% by weight of plasticizers based on the total weight of film-forming materials may be used.  Specified pigments include metal oxides, hydroxides, chromates, silicates, sulphides, sulphates, carbonates, organic dyes and lakes thereof, carbon blacks and metal flake pigments.  Examples include titanium dioxide, copper naphthenate, and Indulin B dye. Specified solvents include toluene, xylene (commercial isomeric mixture), ethyl acetate, 2-ethoxyethyl acetate, n-butyl acetate, n-butyl ether, acetone, methyl isobutyl ketone, n-butanol, and other aliphatic, cycloaliphatic and aromatic hydrocarbons, esters, ethers, ketones and alcohols.  The constituents of the composition are preferably formulated by milling the pigment, part of the plasticizer and at least part of the nitrocellulose to form a pasty or even solid mill base.  The mill base or preferably a solution thereof is then blended with a solution of the copolymer, mixed with the remaining plasticizer and other additives, and diluted to suitable application viscosity, e.g. 10-20% solids. Application of the composition may be made by conventional methods and the coatings may be dried at room temperature or preferably at elevated temperatures, e.g. 45-10 mins. at 65 DEG -120 DEG C.
Patent GB-703567-A (GB)
Title: Improvements in or relating to hand vices
IPC: B25B5/04
Filed: 1951-06-21
Abstract: 703,567. Vices. SAUNT, J. A. Sept. 9, 1952 [June 21, 1951], No. 14710/51. Class 61 In a hand vice comprising a two armed lever 6 which rocks on a lever 1 about a fulcrum 9, the levers are connected together by a screwed stem 5 carrying a nut 8, a spring 7 being interposed between the nut and the lever 6 to urge the operative ends of the levers towards each other. The stem 5 is secured to the lever 1 and passes through a clearance hole in the lever 6. The fulcrum comprises a ball 9, which may be loose or secured to one of the levers. In modifications the fulcrum comprises a length of round rod interposed between the levers, a screw threaded through the lever 6 and having a head which bears on the inside of the lever 1, or a rib or projection on the member 1. The operative ends of the levers either themselves form jaws or are adapted to receive loose jaws 17 having stems which are received in end notches 18. The stems protrude beyond the outer faces of the levers and are grooved to receive spring clips 21 secured to grooved heads 22 on the levers. In a modification for use with long work a hole is provided in the fulcrum and the tang 3 is off-set to bring the handle clear of the centre line of the vice. In another modification the handle is grooved longitudinally.
Patent GB-734149-A (GB)
Title: Improvements in or relating to self-sealing article
IPC: B29C73/16
Filed: 1953-05-27
Abstract: A self-sealing composition comprises a rubbery copolymer of a major proportion of an iso-olefine having 4 to 7 carbon atoms, and a minor proportion of an open-chain conjugated di-olefine having 4 to 8 carbon atoms, e.g. copolymers of isobutylene or ethyl methyl ethylene with isoprene, butadiene-1,3, piperylene, 2,3-, 1,2-, 1,3-, or 1,4-dimethyl-butadiene-1,3, and 1-ethyl butadiene-1,3, 0.2 to 1.0 per cent by weight of said copolymer of a curing agent, from 0.5 to 4 per cent of an auxiliary curing agent, and from 60 to 95 per cent of black iron oxide.  The curing agent is selected from sulphur with mercaptobenzothiazole accelerator, tetramethyl thiuram disulphide, p-quinone dioxime, and p,p1-dibenzoylquinone dioxime, and the auxiliary curing agent is selected from metallic peroxides, e.g. lead, barium, zinc, copper, potassium, silver, sodium, calcium, magnesium, and sodium pyrophosphate peroxides; metallic peroxy-borates, -chromates, -columbates, -dicarbonates, -diphosphates, -disulphates, -germanates, -molybdates, -monocarbonates, -monophosphates, -monosulphates, nitrates; organic peroxides such as caproyl, lauryl, heptoyl, capryl, nonyl, undecyl, tridecyl, myristyl, phenacetyl and benzoyl peroxides; metallic polysulphides such as calcium, sodium, potassium, and barium polysulphides and organic polysulphides such as alkyl, aryl, aralkyl, acyl alkyl and alkylaryl polysulphides.  Antioxidants, softeners, tackifiers, pigments, fillers and reinforcing agents may be included and the composition may be cured at 250-390 DEG  F. for 5 to 180 minutes to give a partially cured product.  Examples describe compositions of an isobutylene-isoprene copolymer, black iron oxide, stearic acid, zinc oxide, p-quinone dioxime, softeners, such as a low molecular weight liquid isobutylene, high molecular weight isobutylene and paraffin oil, and as a tackifier a non-reactive unmodified phenolformaldehyde resin, cured with zinc peroxide, calcium polysulphide and lead peroxide respectively.  After partial vulcanization they are used to form self-sealing layers in tyres or inner tubes.
Patent GB-138539-A (GB)
Title: Improvements in electric insulators
IPC: H01B17/38
Filed: 1919-06-11
Abstract: 138,539. Lutz, H. June 11, 1919. Insulators.-Relates to insulators composed of a body part C of good insulation adapted to withstand atmospheric influences and an insulating- core B to resist tensile strains, and consists in securing the core B to its metal caps A', A<2> by providing the core with flattened ends which are inserted into recesses A' in the caps and then rotated. Packings G, H are provided, and the part A<2> has a nut D. The air in the internal spaces is extracted, and melted insulating-material I poured in. When used in series, Fig. 4, the parts C may vary in diameter.
Patent GB-1101523-A (GB)
Title: A lamp mounting arrangement
IPC: F21V19/00
Filed: 1966-04-04
Abstract: 1,101,523. Lampholders. UNDERWRITERS SAFETY DEVICE CO. 4 April, 1966 [8 Sept., 1965], No. 14778/66. Heading H2E. [Also in Division F4] In a holder for a parallel array of two-pin tubular lamps, terminal blocks 12, 13, each have pairs of bores housing spring-loaded contact sockets, each pair being in a different angular position so that when the lamps are inserted uncoated strips (21) on their respective envelopes are in predetermined angular relation. Each bore, e.g. 31, of the block 12 houses a metal ferrule 34, which closely surrounds one end of a spring 40 which is compressed on insertion of a lamp pin 17 into a frusto-conical end portion 38 of the ferrule. The other end of each spring 40 is attached to a terminal tag 42-23, which passes through aligned apertures in a cover-plate 43 and a support 14, the members 12, 43 and 14 being bolted together. Each pair of bores, e.g. 56, 57 (Figs. 5, 6 and 8, not shown) of the block 13 is formed in a cylindrical insert body 55, which is slidably located in the block 13, having projections (59, 60) which loosely engage slots (62) in the block to allow limited rotation of each insert. The bores 56, 57 each house a spring-loaded contact stud 68, 69, the springs being attached to terminal tags which, as in the block 12, pass through apertures in a cover-plate 43 and support 15.
Patent GB-910215-A (GB)
Title: Process for the separation of wax containing mixtures
IPC: C10G73/06
Filed: 1961-04-24
Abstract: Mixtures containing waxes, for example wax mixtures, waxy oils and oily waxes, are separated by mixing them with a solvent, cooling from solution temperature to wax crystallization temperature, and recovering the wax, the process being characterized in that there is added to the solvent-containing mixture, prior to the recovery of the wax, an aqueous medium, being water alone or water containing other substances, such as freezing point depressants, or impurities (other than surface active agents) which do not deleteriously affect the crystallization of the wax, in an amount between 2% and 25% based on the total volume of the solvent, and the crystallized wax is recovered in the absence of any surface-active agent, of ice-producing conditions, and of any effective foam-producing gas, for example by filtration.  Any suitable solvent may be employed, including the well-known dewaxing media.  Preferred are solvents comprising one or more aliphatic ketones and their mixtures with aromatic hydrocarbons, such as methyl ethyl ketone, methyl isobutyl ketone, and their mixtures with toluene or xylenes.  The aqueous medium when added is preferably substantially cooler than the mixture.  The wax containing mixture may be diluted by successive injections of solvent, the water proportion of the solvent-containing mixture being substantially greater at an earlier solvent injection stage of relatively higher temperature that after further injection at relatively lower temperature. This solvent may contain at least one aromatic hydrocarbon, such that the proportion of aromatics immediately before wax recovery is higher than at earlier stages. The water content of the mixture may be increased while cooling to the wax crystallization temperature.  The aqueous medium may be recovered from the wax or the remaining liquid and recycled.
Patent GB-128559-A (GB)
Title: Improvements in or relating to Ball Bearings Provided with Sectional Races.
IPC: F16C33/60
Filed: 1919-06-12
Abstract: 128,559. Aktiebolaget Svenska Kullagerfabriken. June 18, 1918, [Convention date]. Ball bearings.-In a ball bearing having a a race ring divided in a plane perpendicular to the axis, the edges of the sections 9, 10, Fig. 1, are bevelled and rounded as shown, the bevels being sufficiently small to preserve the two-point character of the contact between the balls and the races. The race grooves in the sections 9, 10 need not have the same centre of curvature in cross section. The Specification as open to inspection under Sect. 91 (3) (a) describes also a race ring divided in a plane containing the axis, the two parts 2, 3, Fig. 2 (Cancelled), being bevelled and rounded at the joints 4. The parts 2, 3 are enclosed in an outer ring 6 which may be shrunk on. This subject-matter does not appear in the Specification as accepted.
Patent GB-718989-A (GB)
Title: Improvements in and relating to indicator mechanisms
Inventor: SMITH KENNETH GRAHAM
IPC: B60Q1/36
Filed: 1952-06-12
Abstract: 718,989. Road-traffic signals on vehicles. N. S. F. Ltd. June 12, 1953 [June 12, 1952], No. 14849/52. Class 118 (2). A semaphore arm 22 attached to a vertical disc 17 is rotated about a horizontal axis from a vertically downwards non-operative position to a horizontal operative position by energising an electro-magnet which causes axial movement of the disc towards a fixed shell member 12, the vertical surface of member 12 and the disc 17 having opposed complementary arcuate cam recesses 18 with interposed ball bearings 19 so that axial movement of the disc causes rotation thereof as described in Specification 602,812, [Group XXXV]. As shown in Fig. 2 the electro-magnet comprises a coil 13 wound round a bush 11 within the shell 12 which is secured to the flange 10b of a bracket 10 mounted in a recess of a door pillar. The disc 17 is attached to an armature 16 attached to a shaft 15 rotatable in a bearing sleeve 14 mounted in the bush 11. The semaphore arm comprises a member 22 of translucent coloured plastic material housing a lamp and attached to a metal spine 21 fastened to an extension 20 of the disc 17, another arcuate extension 17a acting as a counterweight.' When coil 13 is de-energised, the arm falls by gravity against a rubber stop 23 secured to arm 24 on bracket 10 and it is retained in this position by a short rod 25 passing through the end of the shaft 15 projecting beyond flange 10b, the rod being pressed into a corresponding recess in the flange 10b by a flat spring 26 bearing against the end of the shaft and secured to the flange, Figs. 1 and 3 (not shown). According to the Provisional Specification when the arm approaches the horizontal position it operates contacts to light the lamp and reduce the holding current in the coil.
Patent GB-742016-A (GB)
Title: Improvements in or relating to cellulated silica and production thereof
IPC: C04B38/02
Filed: 1953-05-28
Abstract: A cellular silica body containing closed cells is made by grinding together silica and 0.1-5 per cent of a carbonaceous cellulating agent to produce an intimate pulverulent mixture, heating the mixture to a temperature sufficient to cause the silica to soften into a plastic mass and to react with the cellulating agent to produce gases comprising silicon monoxide and thus produce a cellular structure, and cooling the cellular plastic mass to a rigid body. The silica may be in the form of flint, chalcedony or jasper and up to 10 per cent of natural mineral silicates such as feldspar and nepheline may be substituted for the silica.  The cellulating agent may be graphite or silicon, boron, calcium, chromium or zirconium carbide.  The mixture may also contain 0.05-1.0 per cent or more of lithium, carbonate, boric oxide, ferric oxide, magnesium oxide and titanium dioxide.  The mixture may be ground in a ball mill until the average particle size of the silica is reduced to about six microns. After grinding, the mixture is pressed into shapes such as pellets, cones or slabs, placed on a suitable support such as a graphite slab, and then heated to a suitable temperature, for example 2600-3300 DEG F, preferably in an inert or reducing atmosphere.  Heating may be carried out in a carbon electric furnace in an atmosphere of argon.  In commercial operation a tunnel furnace is preferably employed.  After the mass has cellulated to the desired extent and while it is still plastic, it may be extruded or otherwise shaped, for example it may be shaped into a slab by graphite rollers.
Patent GB-1518929-A (GB)
Title: Ventilator
IPC: F01N1/10
Filed: 1976-04-07
Abstract: 1518929 Acoustic attenuators for ventilators GREENWOOD AIRVAC VENTILATION Ltd 7 April 1976 [10 April 1975] 14874/75 Heading F1B An acoustic attenuation device suitable for a window ventilator 1 comprises a housing 4 containing sound absorbing blocks 12, 14, 15, 25 which define a void 29 and a silencing chamber 30 connected to a chamber 21 via a passage 22 defined between walls 23, 24, wall 23 extending into chamber 30 to prevent sound from impinging directly on to wall 24. A hit-and-miss grille 20 below chamber 21 may control the amount of air passing through the ventilator. Mounted above the housing is another sound absorbing block 11  which acts as an acoustic seal for sound which might otherwise pass through the housing. The blocks may be made of foamed plastics, e.g. expanded polyurethane foam, or mineral felt.
Patent GB-1028138-A (GB)
Title: Improved method of packaging and apparatus therefor
IPC: B65B25/06
Filed: 1964-04-10
Abstract: 1,028,138. Packaging-machines. SWIFT & CO. April 10, 1964 [April 15, 1963], No. 14889/64. Heading B8C. [Also in Division B6] A device for locating units of a product, e.g. groups of bacon slices, on a supporting member such as a card or tray prior to further packaging steps (not detailed) comprises a magazine holding the member substantially vertically and reciprocable member removing means for pulling each member from the magazine at right angles to its major surface and bringing it to a horizontal position beneath a product supply means which drops a unit on to it. The member may be a card consisting of two hinged halves one of which is folded over the product. In the machine shown, two magaxines 21, 22, the width of which is adjustable by screwed rods and a crank 60, supply a central loading position to where the product units 11 are fed by a belt 12. Suction grippers 39, 40 are pivotally mounted on the rods of pneumatic motors 47, 48 fitted on a transversely reciprocating carriage 29. The carriage is movable so that when a card 10 is being removed from one magazine, another is being deposited at the loading position. The cards are urged forward by weights 78 on telescopically adjustable rods 77 and retained at the front of the magazines by pins 70. Air from a jet 71 assists in separating each foremost card which is then pulled outwards and turned to the horizontal as the grippers retract and are pivoted on their rods by cam means 53, 55. As each card is carried towards the loading position by the carriage, a wire 91 folds it about a central hinge and it is left with a portion supported by rods 84 beneath the conveyer 12 and a portion resting on a frame 93. The weight of the product falling on it depresses the card to contact an outfeed conveyer 16 and it is fed clear of the loading position. A wire 94 folds down the upper half of the card. The product may be centralized relative to the loading position by means operated by a photo-electric scanner 102, 103. Further scanning means 95, 96 responds to the absence of a card to have one moved into position. In an alternative arrangement in which a flat card is loaded (Fig. 3, not shown), a feeler is contacted by a product unit to cause a stop checking the feeding out of a loaded card to be lowered when the unit has been deposited on a card.
Patent GB-1121584-A (GB)
Title: Improvements in the devices for the continuous manufacture of tiling sheets
IPC: A47B96/20
Filed: 1966-04-05
Abstract: 1,121,584. Laminates. L. C. J. LESCROART and P. L. M. MARLOT. 5 April, 1966 [7 April, 1965; 20 Oct., 1965], No. 15087/66. Heading B5N. [Also in Division D1] A device for bonding tiles 24 to a yieldable backing sheet of an open structure comprises a tiles conveyer 25, means 39 adapted to provide one face of the backing sheet with adhesive, and a backing sheet conveyer comprising two strips 28, 28<SP>1</SP> each moving synchronously with the tiles conveyer 25, and spaced laterally from it and each corresponding one edge of the backing sheet. These strips 28, 28<SP>1</SP> are suitably steel bands, and the backing fabric may be formed from yarns 32 unrolled from spools 33 connected to a rotating distributer comprising a rotating wheel 37 carrying bobbins 38 by means of which the yarns 32 are wrapped around the steel bands 28, 28<SP>1</SP>. Thus a non-woven fabric is formed when the adhesive is applied, and this is led against the reverse surface of the tiles. The adhesive may be cured in an oven 46 and an air blower 42 may be used after the application of adhesive to prevent this filling the gaps in the open mesh fabric. After bonding, the yarns are cut at the edges by circular cutters 47, 47<SP>1</SP>.