baber/WOPTO huggingface dataset:
Patent GB-1256836-A (GB)
IPC: A61G7/05
Filed: 1970-07-09
Abstract: 1,256,836. Clamps. L. L. ROGERS. 9 July, 1970, No. 33404/70. Heading E2B. An invalid support, for a bed 21 having a head 22 and a foot 23 at opposite ends of the bed and in parallel relation, comprises a generally horizontal bar 25 extending longitudinally of the bed and invalid support means 26 mounted thereon, posts 27, 28 rigidly secured to the bar and depending therefrom in outwardly spaced parallel relation to the head and foot respectively, a clamp member 39 slidably mounted on each post for engagement with the top of the respective head and foot, a transverse member 38 underlying the lower end of each post and means securing the member to each post, and a clamp member 41 slidably mounted on each end of the member 38 for engagement with the sides of the head and foot. The clamp members 39, 41 loosely fit the posts and member 38 for easy sliding movement thereon when in aligned relation and are adapted to bind against the posts and transverse members when canted with respect thereto; the transverse member is formed of spring material and adapted for biassing the clamp members into clamping engagement with the top and sides of the head and foot of the bed. In a modification, the support is adapted to be attached to a head and foot comprising a tubular frame.
Patent GB-1256877-A (GB)
IPC: F28F21/06
Filed: 1968-03-22
Abstract: 1,256,877. Hydraulic pumps or motors. HYDROSTATIC TRANSMISSIONS Ltd. March 19, 1969 [March 22, 1968], No. 14025/68. Heading F1A. In a fluid pump or motor having pistons 4 and cylinders 3 disposed in a circular array around an axis, a valve element 14 rotates with the cylinder block 2 relative to the casing 6 and has passages 14A, 14B which cyclically communicate each cylinder 3 with each of a pair of crescent-shaped recesses 10, 11 formed in the casing wall, the cylinders 3 also communicating via the passages 14A, 14B with a pair of pressure chambers 10B, 11B corresponding to the recesses 10, 11, and subtending substantially the same angle at the axis of rotation. The chambers 10B, 11B are formed at the interface between the valve element 14 and a cylindrical skirt 13 extending from the casing end-cap 12, and are so dimensioned to balance the radial forces on the valve element 14. As shown, the pistons 4 are reciprocated by a fixed swashplate 5, and seals 17 couple the cylinders 3 to one end of the axial passages 14A in the valve element 14, sealing rings 16 sealing the other ends of the passages 14A against an annular sealing plate 15. The recesses 10, 11 are provided respectively with an inlet 10A and an outlet 11A. In a second embodiment, the valve element is integral with the cylinder block, and in a third embodiment, the respective recesses 10, 11 are in constant communication with their corresponding pressure chambers 10B, 11B through ducts formed in the casing end-cap 12 and sleeve 13, the ducts being each provided with a flow restricting orifice.
Patent GB-1257044-A (GB)
IPC: B01L99/00
Filed: 1969-05-02
Abstract: 1,257,044. Fluid extractor. CENTURY DISPOSABLE DEVICES Inc. 2 May, 1969 [28 May, 1968], No. 22568/69. Heading A5R. A fluid extractor comprises a vial 10, open at both ends, the forward end being closed by a resilient stopper 16, with a communicating channel leading from the vial 10 to a needle 23 mounted on the front end 22 of the stopper 16, the channel being closed by a web 20 with a slit 21, a moveable piston plug 24 having an actuator 26 moveable in the vial, and means for locking the actuator and plug in a retracted position. The locking means are provided by a pair of wings 30 joined to the actuator, and withdrawable through a slot 13, but on slight rotation of the actuator, unable to pass back through the slot. Alternatively, a sleeve (40), Fig. 5 not shown, with tapering sides is joined to the actuator 26, and is deformable to slide over the outside of the vial 10, and is shorter than the distance of travel of the piston plug 24, so that on fully withdrawing the piston plug 24 the sleeve (40) passes the end of the vial 10, returns to its original shape and abuts the rear end of the vial to form a locking means. The device is operated by withdrawing the piston to form a vacuum in the vial 10. The needle 23 is inserted in the patient or a fluid in a vessel and then the slit 21 is opened by pressure on the stopper 16, so that the fluid flows into the vial. To stop the flow, the pressure on the stopper 16 is released.
Patent GB-1258245-A (GB)
IPC: C03C21/00
Filed: 1968-06-10
Abstract: 1,258,245. Surface treating glass. PILKING- TON BROS. Ltd., D. G. LOUKES, A. S. ROBINSON, and J. LAWRENSON. 5 June, 1969 [10 June, 1968], No. 27564/68. Heading C1M. A hollow glass article 1 is produced having a modified surface characteristic (e.g. colour) by supporting the article on a bath of molten electrically conductive material 4 while the article is hot enough to be electrically conductive (e.g. 600-700‹ C.), and placing an electrically conductive material 29 in the hollow of the article 1, passing an electric current through the glass between bath 4 and layer 29 to impart a desired surface characteristic, separating the treated article from the bath and removing the layer 29 from the article. Either the inside or outside surface of the article may be modified, the direction of current being adjusted accordingly. The bath 4 or layer 29 may be Sn or an alloy of Sn with Li, Na, K, Zn, Mg, A1, Si, Ti, Mn, Cr or Fe, or a Cu-Pb or Cu-Bi alloy, or an alloy of Bi or Pb with Li, Na, K, Zn, Mg, Al, Si, Ti, Mn, Cr, Fe, Co, Ni, Ag, Au, Sb, As, or In. The treatment may be carried out in an inert atmosphere having a reducing constituent (e.g. N 2  comprising 5% H 2 ) so that metal ions in the glass surface are reduced to the metal when the article is removed from the bath. The articles preferably are dipped into the bath while being conveyed along carbon guide rails 16, 17 by chain drive 21, conductive fingers 27 on the chain drive engaging the articles. The articles may be hollow glass blocks, television tube face plates or curved glass sheets.
Patent GB-1259642-A (GB)
IPC: B29C43/00
Filed: 1969-02-03
Abstract: 1,259,642. Casting roll coverings. ROWLANDS PRODUCTS Inc. 3 Feb., 1969 [1 Feb., 1968], No. 5682/69. Heading B5A. [Also in Division F2]  A rigid (e.g. metal) core 12 with coaxial shaft ends 20 is inserted in a hollow mould 24 and the annular space between the core and the mould is filled with a liquid synthetic resin (e.g. silicone rubbers, polyurethane, polystyrene, polyethylene, may be containing distributed particles 16 of silicon carbide, silica, alumina, aluminium carbide &c.) which is then cured (e.g. by passing a hot fluid through spaces 46, 18 in the mould and the core) after the mould has been rotated relative to the core. The liquid resin may first be subjected to a. vacuum to remove air and gas. The resin may be ground after removal from the mould to provide a rough surface. The core 12 may first be coated with a primer 15. After the resin is ground, it may be retained on the core to the mould for another layer of resin of different stiffness. The roll produced may be paired with a steel roll to nip extruded plastics sheet passed between the rolls.
Patent GB-1265892-A (GB)
IPC: B65B55/24
Filed: 1969-05-02
Abstract: 1,265,892. Preparing sack mouths for heat sealing. STRACHAN & HENSHAW Ltd. 1 May, 1970 [2 May, 1969], No. 22593/69. Heading B8C. In an apparatus for opening the mouth of a sack 1 which is made of, or lined with, heat sealable material, and for cleaning around the inside of the mouth ready for heat sealing, the sack 1 is carried by a conveyer, not shown, in direction A, Fig. 4, past vacuum heads 2, Fig. 1, which draw apart the lips 8 of the sack so that a vacuum cleaning finger 9 can be inserted into the mouth to clean its inner surface. Each vacuum head 2 is mounted upon a hinged plate 4, 4<SP>1</SP> and is connected by a cup 3 and stem 5 to a bellows 7 which is supplied with vacuum through a duct 6 when ports 13 of a valve in part of the finger 9 coincide while the finger is travelling between the dotted and full line positions, Fig. 3. As a sack advances in direction A, Fig. 3, the finger 9, having vacuum ports at each side, rapidly rotates in direction B towards the leading end of the mouth of the bag, the material of the lips of the sack being drawn outwardly toward the vacuum heads 2 to obstruct the openings therein and cause a reduced pressure to obtain in bellows 7 which contract to tilt the plates 4, 4<SP>1</SP> and draw the lips 8 apart. Vacuum is then applied to the ports 14 in the finger 9 and shut off from the heads 2 to release the lips so that the finger 9, which remains in a vertical position, vacuum cleans the inner faces of the lips of the sack, the trailing end wall of the sack rotating the finger 9 until it is clear of the sack 1 and the vacuum is cut-off from the ports 14. The finger 9 may be made of two, or more, elements disposed laterally of each other and it may be movable vertically into and out of the sack in which case it is either held stationary or, moved counter to that of the sack. The vacuum supply could be controlled by solenoid operated valves and the finger could carry other cleaning elements in addition to the vacuum openings, in which case counterpressure means is preferably provided on the outside of the sack. The suction means for opening the mouth of the sack may move with the latter otherwise the plates 4 are formed as slide plates. The sack, when cleaned, is passed to closing machine, a heat-sealable material being applied to the mouth of the sack when this sack is made of non-heat sealable material.
Patent GB-1265941-A (GB)
IPC: B31B23/00
Filed: 1970-01-13
Abstract: 1,265,941. Cutting blanks from webs. BOSTON ENVELOPE CO. 13 Jan., 1970 [15 Jan., 1969], No. 1647/70. Heading B4B. Apparatus for cutting envelope blanks 12 from a web 10 comprises a roller 14 having blades e.g. 25, 31 on its curved surface for cutting " chips " from the web and conduit means connecting the areas defined by these blades with a source of vacuum 40 through valves 60, 62 for part of the rotation of the roller 14, to remove these " chips " from the blank. The conduits extend from the ends 50, 52 of the roller 14 axially of the roller, then radially to the areas defined by the blades for cutting notches 24, 26, 28 and apertures 3, 30 in the web. Valves 60, 62 are identical and comprise an arcuate slot 74 for connecting the conduits with the vacuum source 40 to lift the " chips " from the blank and an orifice 72 for connecting the conduits with a pressure source 42 for blowing the " chips " clear of the blades when the blades are aligned with hoods 44, 46, 48 which are permanently connected to the vacuum source 40.
Patent GB-1265997-A (GB)
IPC: H01H33/70
Filed: 1969-02-26
Abstract: 1,265,997. Gas blast switches. ENGLISH ELECTRIC CO. Ltd. 24 Feb., 1970 [26 Feb., 1969], No. 10286/69. Heading H1N. In a gas blast switch of the kind shown in Specification 919,843 the movable arcing contact is subdivided by an insulating barrier 25. This separates the contact making portion 24 from the central electrode 23. It prevents an inward pinching effect on very heavy currents and ensures that the current path to the contact making surfaces is bowed downstream of the blast and thus generates a magnetic field tending to drive the arc downstream. This ensures that the arc does not move upstream in the period just after contact separation before the blast action is sufficient. In a modification (Figs. 4, 5, not shown) slots are cut in the surface of the contact portion 24 to ensure that blast commences as soon as the blast valve is opened and before the contacts separate. Further slots may be cut in the electrode 23 as disclosed in Specification 1,022,682.
Patent GB-1267118-A (GB)
IPC: E04F11/16
Filed: 1970-04-02
Abstract: 1,267,118. Moulding stair treads. G. A. SEEGERS. 2 April, 1970, No. 15764/70. Heading B5A. [Also in Divisions E1-E2] A mould for producing a stair tread comprises a plurality of spaced raised portions 12 for producing voids in the back of the tread and a plurality of spaced channel elements 14 which produce channels in the back surface which do not penetrate to one edge of the moulded tread. The channel elements 14 may be cast into the treads and support reinforcement 16 for the slab. Preferably the mould has four parallel channel elements 14 and six void producing projections 12.
Patent GB-1306934-A (GB)
Title: Derivatives of allylphenol polymers
IPC: C10L1/195
Filed: 1969-05-22
Abstract: 1306934 Acylated allyl phenol polymers BRITISH PETROLEUM CO Ltd 19 May 1970 [22 May 1969] 26198/69 Heading C2C [Also in Division C5] The invention comprises compounds of the formula where X is a group and Y is a hydrogen atom or -COR group, one of the groups Y being hydrogen and the other a -COR group, where R is a C 12 -C 30  alkyl group, R<SP>1</SP> is hydrogen, a C 1-4  alkyl group or an aryl group and n is from 1 to 50. Such compounds are obtained by polymerizing an appropriate o-allyl phenol and acylating the polymer. In the example allyl phenyl ether is prepared by reacting phenol with allyl bromide, rearranged to form o-allyl phenol by refluxing with sodium hydroxide solution, oallyl phenol is polymerized and the polymer reacted with arachidoyl chloride to form the acyl derivative. The products are pour point depressants in fuel oils.
Patent GB-1306997-A (GB)
Title: Memory
IPC: G11C16/04
Filed: 1970-04-29
Abstract: 1306997 Variable conduction threshold memory SPERRY RAND CORP 29 April 1970 [9 May 1969] 20651/70 Heading G4C [Also in Division H3] A memory comprises a number of insulated gate field effect transistor memory cells of the variable conduction threshold type, see Specification 1,280,519. General.-The memory is a matrix having word lines W1-W4 connected to addressing circuitry 68 comprising four NOR gates 71, 73, 75, 77 and associated switching transistors 85, 87, 89, 91. The circuitry 68 is formed on a common substrate as are the memory cells, a deep diffusion 69 being provided to isolate the address and memory circuits. In operation a WRITE cycle is begun by grounding the gates of all the memory transistors and applying a - 50 volts to the substrate, in practice the source electrodes, via transistors 67. This procedure results, when the voltages are removed, in a negative charge being stored at the insulation between the gate and the substrate and the transistor being set in its positive conduction threshold (binary zero). Selected cells are then set to binary one by applying - 40 volts to terminal 61, i.e. the cell drains, and a potential of - 50 volts to address terminal 83, i.e. to the cell gates, and by holding terminals 87 and 65 in the address and memory sections respectively at ground potential. Assuming binary one is to be written into cell 29 and binary zero into cell 31 wordline W1 is energized by the appropriate address signals Y 1 , Y 2 , X 1 , X 2  and transistors 67 1  and 67 2  are enabled and not enabled respectively. Transistors 63 1  and 63 2  are then enabled so that, although -40 volts is applied to the drains of both cells 29 and 31, the source drain path of 29 is clamped to earth via transistor 67 1  whereas that of cell 31 remains at - 40 volts, due to 67 2  being non-conductive. Thus the potential difference between the gate and the source/drain of cell 29 is 50 volts and the negative charge stored at the gate is dissipated and replaced by a positive charge whereas the difference in cell 31 is only 10 volts and the gate charge is undisturbed. Thus at the end of the write cycle cell 29 stores binary one and cell 31 stores binary zero. READOUT is made by enabling transistors 67, placing - 20 volts on address terminals 83, 92, on memory terminal 61, i.e. the cell drains, and on terminal 64. Address line 88 is then pulsed with a negative voltage as the required word line is addressed so that a negative voltage of magnitude less than the 40 volts used in writing binary one is applied to the cell gates. This pulse biases transistors storing a negative gate charge (binary zero) conducting and these cells draw current through load transistors 63 causing a voltage pulse to occur at the relevant output 60. However the pulses are of insufficient magnitude to bias cells storing a positive gate charge (binary one) conducting so that these cells do not draw current and no voltage pulse occurs at the corresponding output 60.
Patent GB-1310182-A (GB)
Title: Belt conveyors
IPC: B65G21/14
Filed: 1970-12-08
Abstract: 1310182 Endless conveyers BURKESHIRE ENG CO Ltd 8 Dec 1971 [8 Dec 1970] 58195/70 Heading B8A  A belt conveyer comprises a boom 12 which is slidably suspended from a main boom 1. At its inner end 14, the boom 12 has a roller 22 which runs along a track 23 on the top of the main boom 1, the remote end 13 of the boom 12 being supported on rollers 27 mounted on straps 24 secured to the main boom. Chains 28 suspend the conveyer from a monorail, for example. Sections 4, 5 of the main boom are connected by plates 6 and a section 9 is adjustably connected by plates 10 between the section 5 and a drive unit 7. For displacing the boom 12 relative to the main boom, a pair of hydraulic rams have brackets 18 which are releasably connected, by a pin engageable in holes 19, with the boom 12. The belt 30, driven by a motor-gear-box unit 31, engages various idler and tensioning rollers.
Patent GB-1313506-A (GB)
Title: Vapour vacuum pumps
IPC: F04F9/00
Filed: 1969-05-07
Abstract: 1313506 Diffusion pumps EDWARDS HIGH VACUUM INTERNATIONAL Ltd 4 May 1970 [7 May 1969] 23382/69 Heading F1E A diffusion pump comprises a gas inlet 16 having an isolation valve 18 and a fluid-cooled casing 8 which has an enlarged portion surrounding the top-most nozzle 2 of a jet assembly 6 to increase volumetric pumping speed, and containing baffles or traping surfaces to reduce backstreaming. The valve 18 and the baffles 14 or vapour trap may be dismantled to provide access to the jet assembly 6. The baffles 14 may have one or more cooled guard rings to limit the solid angle through which vapour is emitted from the nozzle 2.
Patent GB-1315314-A (GB)
Title: Metal extrusion press having a die-changer device
IPC: B21C23/21
Filed: 1969-10-03
Abstract: 1315314 Extruding LOEWY ROBERTSON ENG CO Ltd 3 Sept 1970 [3 Oct 1969] 48803/69 Heading B3P An extrusion press having a die changing device similar to that described in Specification 1,188,677, has a hydraulic jack 100 for supporting the die or die assembly 30 out of engagement of the carriage 52 to enable the die or die assembly 30 to be repositioned on the carriage 52. After the die assembly 30 has been transferred from the extrusion press by the transversely movable slide (14) (Fig. 1, not shown) on to one end of the carriage 52, it is raised above the carriage by the jack 100 which extends through a slot 55 in the carriage 52. Subsequently, the carriage 52 is moved to the left and the die assembly 30 lowered by the jack 100 on to the other end of the carriage 52 so that when the carriage is moved back to its initial position the die assembly 30 is enclosed in the heating chamber 82. Reference has been directed by the Comptroller to Specification 1,188,677.
Patent GB-1315847-A (GB)
Title: Thickened slurry explosives methods for the preparation of such thickened slurry explosives and nozzles for use in such methods
IPC: F42D1/10
Filed: 1970-06-19
Abstract: 1315847 Mixing nozzles IMPERIAL CHEMICAL INDUSTRIES Ltd (D K BISWAS) 21 May 1971 [19 June 1970] 29901/70 Heading B1C [Also in Divisions C1 E1 and F3] A column of slurry explosive has an outer layer thickened to a greater degree than the remainder of the columns. Such a column may contain dissolved, uniformly dispersed, crosslinkable thickening agent, which has become more cross-linked in the outer layer than in the remainder of the column to cause the desired thickening of the outer layer. In forming the column a liquid thickening agent is fed against the surface of the column and becomes mixed with the outer layer to cause the required thickening of this layer. Preferably a liquid, cross-linking agent is fed to the surface of an aqueous stream of crosslinking thickening aqueous-containing slurry explosive as non-radially directed jets as the slurry explosive passes through or emerges from a nozzle by which the slurry explosive is placed in a borehble, container or cartridge. preferred slurry explosive comprises ammonium nitrate, sensitiser, e.g. self explosive material such as TNT or PETN or a non-explosive material such as aluminium, water, thickening agent, e.g. guar gum, and a cross-linking agent, e.g. a water soluble chromate or dichromate.
Patent GB-1321086-A (GB)
Title: Formwork
IPC: E04G11/46
Filed: 1970-04-27
Abstract: 1321086 Shuttering for ribbed floors R C REID K A BOND W D JAMES and G G LARON 19 April 1971 [27 April 1970] 20049/ 70 Heading E1S A ribbed concrete floor is cast on shuttering which comprises inverted channel-section units 20 of a resilient material, e.g. sheet metal, with outwardly extending edge flanges 22 and further short perpendicular flanges 23 by which adjacent units are bolted together, each unit being provided with a device for moving the side walls 21 towards and away from each other, e.g. a turnbuckle 28 connected by links 27 to the side walls. The units 20 may be reinforced at longitudinally spaced points by transverse inverted T-shaped stiffeners, each of which has the end of its stem secured to the base 24 of the unit and the ends of its cross-bar connected by bolts through slots to longitudinal ribs on the side walls 21, to allow movement of the walls.
Patent GB-1322322-A (GB)
Title: Paint applicator handles
IPC: B05C17/00
Filed: 1969-05-29
Abstract: 1322322 Paint applicators P MARTIN 31 July 1970 [29 May 1969] 4541/73 Divided out of 1322321 Heading A4K [Also in Division B4] The subject matter of this Specification is identical with that described in Specification 1322321 but the claims are directed to the handle.
Patent GB-1324367-A (GB)
Title: Disperse dyes
IPC: C09B43/22
Filed: 1970-11-24
Abstract: 1324367 N - ethyl - N - tolyl - # - aminoethylbenzoate YORKSHIRE CHEMICALS Ltd 24 Nov 1970 [4 Dec 1969] 59178/69 Heading C2C [Also in Division C4] The compound of formula  in which R<SP>5</SP> is CH 3 , R<SP>6</SP> is H, R<SP>7</SP> is C 2 H 5  and R<SP>8</SP> is -CH 2 CH 2  is prepared by reacting benzoyl chloride with 1-(N-ethyl-N-#-hydroxyethyl)- amino-3-methylbenzene in pyridine.