baber/WOPTO huggingface dataset:
Patent GB-1434067-A (GB)
Title: Temperature compensated voltage regulator circuits
IPC: G05F1/56
Filed: 1973-12-17
Abstract: 1434067 Automatic voltage regulation FAIRCHILD CAMERA & INSTRUMENT CORP 17 Dec 1973 [10 Jan 1973] 58396/73 Heading G3X  A circuit for supplying emitter coupled logic integrated circuitry with a reference voltage stabilized against temperature and supply variations, includes a pair of transistors one of which has a base resistor of a value chosen to produce compensation for parameter variations introduced during semi-conductor material processing. The basic circuit, Fig. 1, includes positive and negative supply terminals 12, 14 connected by a series resistor R1 and three parallel circuit branches including a diode Q1, transistor Q2 and transistor Q3 respectively. A stabilized output voltage V ref  is taken from the collector of transistor Q3, and variations caused by changes in base-emitter threshold voltages and base currents are compensated by choosing the value of base resistor R x  in accordance with a calculated formula. A practical circuit, Fig. 2 (not shown), for providing two reference voltages, includes three additional transistors connected between the parallel circuit branches and supply terminal 12. A formula for deriving an optimum value for resistor R x  in this circuit is also given.
Patent GB-1458209-A (GB)
Title: Producing a matrix from an original plate having a relief image
IPC: G03F7/038
Filed: 1973-12-18
Abstract: 1458209 Producing matrices from original plates having relief images SUMITOYO CHEMICAL CO Ltd 18 Dec 1973 [18 Dec 1972] 58643/73 Headings G2C and G2X A matrix is produced by contacting an impressionable material under pressure with an original plate, the original plate being prepared by applying a bonding layer and then a relief-supporting layer to a metal base, semi-hardening the relief-supporting layer by photopolymerization, applying a reliefforming layer to the relief-supporting layer, exposing portions of the relief-forming layer to actinic radiation to cross-link those portions and subsequently removing non-exposed portions of the relief-forming layer, the semi-hardened reliefsupporting layer comprising a polymeric material formed by photopolymerizing substances, at least 50 wt. per cent of which are identical with the substance(s) used to form the resin of the reliefforming layer. The metal base may be of iron, stainless steel, aluminium, zinc, copper, magnesium, nickel or an alloy thereof and may be 0À2-5mm thick. The bonding layer may comprise a synthetic resin brown paint. The relief-supporting layer may be 0À1-1mm thick and comprise (i) an unsaturated polyester having an acid value of 30 made from maleic anhydride, isophthalic acid and propylene glycol, styrene, hydroquinone and benzoin, (ii) a similar polyester but made using triethylene glycol, styrene, hydroquinone and benzoin methyl ether, (iii) a polyamide, glycidyl methacrylate, methacrylic acid, benzophenone and hydroquinone monomethyl ether, or (iv) polyvinyl alcohol (molecular weight 500 and saponification value 88%) treated with sodium benzaldehyde-o-sulphonate, 2, 6-di-tertbutyl-p-cresol, acrylic acid, glacial acetic acid and acryloyl chloride, and 2-hydroxyethylmethacrylate, benzoin and hydroquinone. The impressionable material may be a polycarbonate. In Example 3 the original plate having a relief image is post-  exposed for 10 minutes to complete hardening.
Patent GB-1434621-A (GB)
Title: Foamable polycarbonate composition
IPC: C08K7/14
Filed: 1973-12-19
Abstract: 1434621 Foamable polycarbonate compositions GENERAL ELECTRIC CO 19 Dec 1973 [2 Jan 1973] 58866/73 Heading C3C A foamable flame-retardant injection mouldable composition comprises (a) a thermoplastic aromatic carbonate polymer which is (1) a polycarbonate of a bromine or chlorine substituted dihydric phenol and/or (2) a copolycarbonate of a halogen-free dihydric phenol and a bromine or chlorine substituted dihydric phenol, or (3) a mixture of (1) and/or (2), with a polycarbonate of a halogen-free dihydric phenol; (b) a filler which is fibrous glass or a finely divided powder, in an amount of from 1 to 50 weight per cent of (a); (c) antimony oxide in an amount of from 0À10 to 5À0 weight per cent of (a) (as flame retardant); (d) a polytetrafluoroethylene resin in an amount of from 0À10 to 5-0 weight per cent of (a); and (e) a foaming agent in an amount of from 0À10 to 2À0 weight per cent of (a). The polycarbonate may be derived from bisphenol-A (i.e. 2,2-bis-(4-hydroxyphenyl)propane or tetrabromobisphenol - A. The foaming agent may be dinitrosopentamethylene tetramine, p-toluene sulphonyl semicarbazide, 5 - phenyltetrazole, calcium oxalate or trihydrazino - s - triazine. The compositions were injection moulded in the examples.
Patent GB-1275917-A (GB)
Title: Improvements in high magnification optical apparatus
Inventor: FREEMAN ROBIN JOHN
IPC: G02B23/00
Filed: 1968-12-12
Abstract: 1275917 Microscopes or screen projectors with enlarged exit pupils VISION ENG Ltd 1 Oct 1969 [12 Dec 1968] 59137/68 Heading G2J A microscope having no eye-pieces or a screen projector has means to position and illuminate an object to be viewed and an optical device for producing enlarged exit pupils which comprises in the light path to the eye of an observer a multiplicity of lenticular faces which are traversed within the light path such that when the motion of said faces exceeds the persistence of vision the angle of light egress is multiplied with respect to the angle of light incidence. In a microscope, a primary image at B is further imaged by an objective C and projection lens D and then passes through a beamsplitter prism E to collimator lens F abutting a rotating disc G having the lenticular reflective faces thereon. The magnified images so produced are further enlarged by field lens H and finally appear as enlarged exit pupils (approximately 2 inches to 5 inches in diameter) at normal interpupilliary distance. The lenticular faces on disc G may also be formed on an endless belt of aluminized plastics material (27) Fig. 5 (not shown), which is rotated or motor driven on rollers (29). In a profile screen projector they may be embossed as convex protrusions on a transparent plate, Fig. 4 (not shown). A non-stereoscopic microscope and a research microscope having the optical device are also described. Applications for such microscopes and screen projectors may be teaching aids, small screen displays and in sales promotion films.
Patent GB-1460890-A (GB)
Title: Machines having a reciprocating member coupled to a rotary  member
IPC: F01B9/00
Filed: 1972-12-22
Abstract: 1460890 Reciprocating piston IC engines H E ROBERTS 21 March 1974 [22 Dec 1972 23 March 1973] 59354/72 and 14053/73 Heading F1B [Also in Division F2]  A piston 23 reciprocating in a cylinder 24 is coupled to a rotary shaft 11, 12 by a sleeve unit 15  rotatably mounted on a crank-pin 10, the sleeve unit 15 having a pinion 16 which is adapted to mesh a fixed ring of teeth 20 and an eccentric hub 17 which engages a big end 22 of a connecting rod 21. The axis of the hub 17 extends through the pitch circle of the pinion 16, and the diameter of the pitch circle of the ring of teeth 20 is twice that of the pinion 16 so that the axis of the hub 17 is caused to reciprocate along a straight line which intersects the axis of the shaft 11, 12. Alternatively, the sleeve unit 15 is formed integrally with the crank-pin 10 which is rotatably mounted in the shaft portions 11, 12. An opposed piston twin cylinder engine may be constructed by securing a second connecting rod to the rod 21. Additional big end bearing hubs may be formed integrally with the hub 17 and be secured to pistons in in-line or angularly spaced cylinders. Specification 1094649 is referred to.
Patent GB-1185134-A (GB)
Title: Clip for Holding Pipes, Rods and the like
IPC: F16L3/13
Filed: 1968-12-13
Abstract: 1,185,134. Clips. ILLINOIS TOOL WORKS Inc. 13 Dec., 1968 [31 Jan., 1968], No. 59482/ 68. Heading E2B. A sheet-metal clip for securing a pipe or the like 38, comprises a base 14 having downwardly projecting barbed stud members 30, 30a for engagement in a hole 35 in a mounting board 34, and curved arms 16, 16a (and 18, 18a, not visible) which engage the top of the mounting board and support gripping jaws 24, 24a which also have barbs 26, 28 (and 26a, 28a, not visible). In a modification, (Figs. 5 and 6, not shown) the barbs and the edges 25, 25a of the jaws are turned back to avoid denting the pipe surface, and the pipe rests on a saddle (50) on the base 14.
Patent GB-1385490-A (GB)
Title: Yarn heating apparatus
IPC: G05D23/19
Filed: 1971-12-23
Abstract: 1385490 Drawing and heat setting yarns HEATING ELEMENTS Ltd 8 Dec 1972 [23 Dec 1971] 60199/71 Heading B5B [Also in Division G3] In an arrangement for drawing, heat setting or texturing a running yarn, the yarn is passed over a heating surface of at least one rotating drum (Fig. 3) heated by a stationary electric element 4. The element is controlled in dependence upon the surface temperature sensed by a sensor 6 and upon the rotational speed of the drum measured by a tachometer-since the heat imparted to the yarn and the heat losses due to wind vary with speed-(see Heading G3R). The sensor 6 is mounted in a stationary insulating ring 3 surrounding the edge of the drum. The drum is mounted on and is rotatable with a shaft 2. There may be separate temperature control units for each drum or a single control unit for all the drums.
Patent GB-1321817-A (GB)
Title: Sutures having long lasting germicidal and or other pharmacological  properties
IPC: D06M16/00
Filed: 1970-06-12
Abstract: 1321817 Germicidal and/or pharmacological sutures SUTURES Inc 12 June 1970 [20 Aug 1969] 60811/69 Heading A5E A method of imparting long-lasting germicidal and/or other pharmacological properties to a suture, comprises the steps of contacting the suture with a first solution capable of swelling the suture and containing first high molecular weight ions to swell the suture and to introduce said first solution including said first ions into the body of said suture, and subsequently contacting the suture with a second solution capable of swelling the suture and containing second high molecular weight ions having a charge opposite to the charge of the first ions to introduce said second solution including said second ions into the body of said suture, whereupon said first and second ions react to form a high molecular weight substantially insoluble precipitate in the body of said suture, the ions of one of said solutions being cations, the ions of the other of said solutions being anions selected from the group consisting of anions of an organic acid and anions of an organic ester sulphonate, each of said cations or anions being germicidal and/or having other pharmacological properties, whereby the insoluble precipitate formed in the body of said suture imbues said suture with long-lasting germicidal and/or other pharmacological properties. Sutures produced as above and sutures containing a salt of a basic antibiotic and an acid antibiotic also are claimed. The solutions used may be aqueous or organic (e.g. glycols), and if desired the suture may be pre-swollen. The cation may be benzcthonium, benzalkonium, lauryl dimethyl benzyl ammonium, cetyl dimethylbenzyl ammonium, lauryl pyridinium, bacitracin, polymyxin, tyrothricin, viomycin, vancomycin, neomycin, erythromycin, streptomycin, carbomycin, nystatin, kanamycin, puromycin, cycloserine, tetracycline, aureomycin, oxytetracycline, subtilin, anisomycin, or gentamycin. The anion may be heparin, penicillin (G, N, O or V), nafcillin, methicillin, oxacillin, fumagillin, lauryl sulphate or stearate. The suture may be made of silk, polyester, gut, cotton, regenerated cellulose, cellulose ester, polyamide, polyacrylic, polyvinyl or polyolefin. The specification includes references to Specifications 1229425 and 1321816.
Patent GB-1246680-A (GB)
Title: Rifle grenade
Inventor: DAUBAN ANDRE
IPC: F42B30/04
Filed: 1968-12-24
Abstract: 1,246,680. Rifle grenades. MECAR S.A. 24 Dec., 1968 [28 Dec., 1967; 29 Dec., 1967], No. 61340/68. Heading F3A. A rifle grenade comprises an explosive head 2 and a fuze 6 coaxially disposed around a duct 7 through which a bullet 38 from a rifle 5 can pass, the fuze comprising a first member 8 provided with at least one firing-pin 16 and detonator 13, a second member 21 comprising at least one cap holder 26 and percussion cap 24, means (not shown) which, before their removal or ejection, prevent relative rotation of the first and second members, under the action of a spring, from a position in which the percussion cap is out of alignment with the firing-pin and detonator, into a position of alignment, and means 28 which restrain the firing-pin and percussion cap from relative movement, parallel to the duct 7, until the aligned position is attained. Either of the members 8 and 21 is rotatable. The cap holder 26 may be an inertia member which serves to throw the percussion cap against the firing-pin on impact of the grenade, or the firing-pin is arranged to be displaceable. The retaining means 28 comprises a ring, the inner peripheral edge of which engages retaining grooves in the cap holder other than in the position of alignment where the cap holder enters a recess in the edge of the ring. The removable or ejectable means for preventing relative rotation of parts 8 and 21, comprises a plug (not shown) in the duct 7, with spindles extending into the fuze. The plug is ejectable by the bullet 38 or removable by hand if a blank cartridge is to be used. The duct 7 can be obturated by a metal disc (45, Fig. 6, not shown), which can be perforated by a bullet. A supplementary propellant charge (46, Fig. 7, not shown), ignitable by the hot propellant gases issuing from the rifle, may be lodged in the tail of the grenade.
Patent GB-1299188-A (GB)
Title: Improvements in or relating to high voltage d.c. system
IPC: H01F27/32
Filed: 1969-12-23
Abstract: 1299188 Transformers; inductors LICENTIA PATENT VERWALTUNGS GmbH 23 Dec 1969 [23 Dec 1968] 62741/69 Heading H1T An oil-cooled transformer or reactor for use in H.V.D.C. systems has the end turns of its winding separated by small gaps 11 in order to increase the area of winding insulation exposed to oil and ensure that an adequate proportion of the direct potential drop occurs across the oil. The maximum direct potential across the solid winding insulation occurs at a point 10. The turns of a layer winding may also be spaced from the inter-layer insulation by channels 12 and the main cooling oil flow occurs along a wider channel 3. An insulating barrier (17, Fig. 7, not shown) over the end turns may be used to force the oil to enter the winding away from the winding end, and the exposed area may be further increased by subdividing the conductor into two or more wires connected in parallel and separated by narrow channels (13).
Patent GB-2000793-A (GB)
Title: Asbestos free friction compositions
IPC: F16D69/02
Filed: 1978-07-07
Abstract: Friction compositions contain, in place of asbestos >20% wt. of non-fibrous inorganic compounds, of Moh hardness 2-5, and also:(a) a thermo-setting resin, (b) cashew nut resin particles, and (c) non-asbestos fibre. Use: disc brake pads.
Patent GB-2025469-A (GB)
Title: Plasma sprayed MCrAlY coatings
IPC: C23C4/08
Filed: 1978-07-17
Abstract: The oxidation-corrosion resistance of plasma sprayed MCrAlY overlay coatings is improved. The coating method involves plasma spraying the MCrAlY coating alloy onto a superalloy substrate, applying a chromium or aluminium envelope over the outer surface of the coating or mechanically working the outer surface to seal the surface against penetration by the high pressure isostatic atmosphere to be subsequently applied and then hot isostatically pressing the coated substrate to close the coating defects and diffuse at least a portion of the envelope, is present, into the overlay coating. The invention thus can provide an MCrAlY coating not only substantially free of pores, voids and the like defects but also having at least an outer zone enriched in chromium, aluminium, or like metals.
Patent GB-2007412-A (GB)
Title: Electronic flow presetter
IPC: G01F15/00
Filed: 1978-09-27
Abstract: An electronic flow presetter having a plurality of functional circuits including a first set of circuits, composed of CMOS circuits, responsible for storing the operational state of the presetter, and a second set of circuits which are not required in connection with the storing of the operational state of the presetter, and a power pack associated with the presetter. The power pack includes a rectifier circuit 21 for normal energisation of both sets of functional circuits from an a.c. power supply, a storage capacitor 20 charged from the rectifier circuit 21 during normal use of the presetter, and switching means 23 to connect the first, but not the second, set of functional circuits, to the storage capacitor 20, on occasion of a drop in the voltage from the a.c. power below a reference level, to maintain storage of the operational state of the presetter immediately prior to the voltage drop. <IMAGE>
Patent GB-2030466-A (GB)
Title: High capacity blood transfusion micro filter
IPC: A61M5/165
Filed: 1978-09-26
Abstract: A high capacity blood transfusion micro filter comprises a case (22, 24) terminating at its upper and lower ends in inlet and outlet ports (18, 34), respectively, a perforate filter material support (46) defining an upper chamber (22) thereabove, a plurality of spaced, inward projections (42) in the upper chamber (22), and a quantity of woolly filter material in the upper chamber (22) and fluffed into the spaces between the projections (42) to provide therein areas of filter material of decreased density. Further woolly filter material may be contained in a lower chamber (26) defined below support (46), the material in chamber (26) being of greater density than that in the central part of chamber (22). The support means (46) may be arranged to direct the flow of blood centrally in both the upper and lower chambers. <IMAGE>
Patent GB-2023934-A (GB)
Title: Electromechanical time-lag relay of narrow construction
IPC: G04F3/06
Filed: 1978-12-13
Abstract: An electromechanical time-lag relay has at least one set of contacts actuable without a time-lag, at least one set of contacts actuable with a time-lag, a synchronous motor driving reduction gearing coupled to a time-lapse wheel, and a coil having an armature. The synchronous motor 14 and the coil 1 are attached to a common heat conducting plate, the axis of rotation of the synchronous motor 14 extending perpendicular to a longitudinal axis of the time- lag relay and the axis of the coil 1 extending parallel to said longitudinal axis. The contact sets 5, 6, 7, and 15, 16, 17, each comprise members inserted in and retained by a part consisting of insulating material which is partly overlapped by a front plate. The free ends of the contact set members directly support the contacts and a respective lever 3, 9 is provided for actuating each contact set. The lever 9 is driven by a spring 8 from the lever 3 and after the set time-lag operates contact sets 15, 16, 17. <IMAGE>
Patent GB-2027493-A (GB)
Title: Pneumatic hammer without separate distributing valve
IPC: B25D/
Filed: 1979-05-18
Abstract: A pneumatic hammer comprises an external cylinder 30 defining an internal cylindrical cavity in which a movable element 40 is mounted for axial sliding, this element being of a lesser axial length than said cylindrical cavity so as to define alternately and/or simultaneously a lower chamber 11 and an upper chamber 10 within the said cylindrical cavity, and means for connecting the movable element to a tool to be actuated by the element, wherein the said movable element 40 has two axially-extending passages, 6, 4, the first of which, 6, communicates with the upper face of the movable element and the second, 4, with the lower face of the movable element, the first passage communicating through a first branch passage 5 of the element with the external surface of the movable element at the lower half of the element and the second passage communicating through second and third branch passages 8, 3 of the element with the external surface of the movable element respectively at the upper half and at about the mid-section of the surface, and wherein the external cylinder 30 has two passages 1, 9 which open on to the internal cylindrical surface thereof and are for communication respectively with a pressurised fluid source and with the atmosphere; the axial distance between the two internal openings of the external cylinder being substantially equal to the axial distance between the first and the second branch passages of the movable element. <IMAGE>
Patent GB-2023396-A (GB)
Title: A device for breeding snails and application thereof
IPC: A01K67/033
Filed: 1979-05-21
Abstract: A device for breeding snails comprises at least one independent column of superimposed cells, each cell being provided with an inclined irrigation surface 8 and at least two boxes 7, the said irrigation surfaces being arranged one beneath the other and the said column having a top part which comprises means for supplying water to the said irrigation surfaces. <IMAGE>
Patent GB-2050144-A (GB)
Title: Reinforced toe caps
IPC: A43B23/08
Filed: 1979-06-09
Abstract: A safety boot for use in industrial situations and which can meet the requirements of BSS 1870/1970 without using a steel toe cap has a toe cap is reinforcement 32 of layers of glass fibre fabric reinforced with epoxy resin. <IMAGE>
Patent GB-2032011-A (GB)
Title: Bearing arrangement
IPC: F16C32/00
Filed: 1979-08-23
Abstract: A bearing arrangement for the rotary support of a heavy shaft (5) consists of a cradle (1), the operative surface (10) of which slidably carries a member (4) of flexible sheet material adapted to receive a shaft journal (50) resting thereon whereby sliding movement of the member (4) on the cradle surface (10) facilitates rotation of the shaft (5). The member (4) preferably consists of an endless belt of chrome leather having an underface of nylon. The cradle surface (10) and/or the underside of the belt (4) may be faced or treated with anti- friction material such as PTFE. The belt (4) may be tensioned and means provided for releasably locking the belt (4) against movement as required in order to prevent or resist rotation of the shaft (5). <IMAGE>
Patent GB-2040041-A (GB)
Title: Drug detection device
IPC: G01N33/15
Filed: 1979-08-29
Abstract: The drug detection device which is composed of a pair of members interconnected together to form an internal enclosed chamber. An elongated swab having an absorbent tip is located within the internal enclosed chamber. One of the members of the housing has attached a pair of separate compartments which are interconnected by a frangible seal and further being interconnected to the internal chamber by a frangible seal. Within each of these compartments there is to be located a different substance and upon breaking of the frangible seal between the compartments, the substances within these compartments are to be intermixed. Upon the breaking of the frangible seal to the internal chamber, the tip of the swab will then become in contact with the intermixed substances. The other member of the housing has attached at its closed end a third compartment and within this third compartment is to be located a third substance. After the tip of the swab has been placed in contact with the drug contact area and caused to come in contact with the first two substances, the tip of the swab is then placed adjacent the third compartment and upon breaking of its frangible seal, the tip of the swab will then be contacted by the third substance. If the tip of the swab was placed in contact with a certain family of drugs, the tip of the swab will then change color. Prior to use of the device of this invention, the pair of members of the device are sealingly closed so as to maintain the device in an uncontaminated condition prior to use.