baber/WOPTO huggingface dataset:
Patent GB-1266046-A (GB)
IPC: H02H7/26
Filed: 1969-06-05
Abstract: 1,266,046. H.V.D.C. converter systems, protection. NAUCHNO-ISSLEDOVATELSKY INSTITUT POSTOYANNOGO TOKA. 5 June, 1969, No. 28409/69. Headings H2F and H2K. Relates to circuitry for sensing earth faults in the D.C. bus-bar system of an H.V.D.C. converter sub-station. Static converters 1, 2 feed current I 1  to the D.C. bus-bar 3 while static converters 9, 10 draw current I 2  from the bus-bar. D.C. transformers 5, 12 sense the direct currents I 1 , I 2  and feed proportional alternating current magnitudes i 1 , i 2  to a subtractor 6. The difference value (i 1 -i 2 ) is rectified at 7 and fed to a comparator 8. The bus system includes earthing circuits 13, 14, 15 external of the converter sub-station. D.C. transformers 17, 18, 19 sense direct currents I 3 , I 4 , I 5  respectively and produce alternating current magnitudes i 3 , i 4 , i 5  respectively which are a measure of the direct currents. Currents i 3 , i 4 , i 5  are summed in a unit 20 and the sum current is rectified at 21 and fed to the comparator 8 for comparison with current (i 1 -i 2 ). With no earth fault in the bus-system portion bounded by the sensing transformers the difference between absolute magnitudes i 1  and i 2  equals the sum of the absolute magnitudes of currents i 3 , i 4 , i 5  and there will be no output from the comparator 8. With an earth fault at point A for example, currents I 1 , I 2  continue to flow but the earthing circuits 13, 14, 15 are effectively short-circuited and currents I 3 , I 4 , I 5  fall to zero, assuming the fault resistance is ignored. Thus the inputs to comparator 8 are unbalanced and it produces an output signal. Earth faults in portions of the D.C. system outside the portion bounded by the transformers e.g. at points B or C do not produce an output from the comparator 8. The D.C. transformers are energized by primary windings (not shown) connected to an auxiliary A.C. source. It is stated that in a sub-station wherein all the converter units are of one polarity (e.g. all feeding the bus-bars) the D.C. transformer in the common connection of the converters may be directly connected to the comparator 8 and the rectifier 21 may be omitted, The transmission line has a positive and a negative conductor at substantially equal voltages with respect to earth.
Patent GB-1288859-A (GB)
IPC: B41J17/24
Filed: 1970-12-04
Abstract: 1288859 Ink ribbon mechanism COLUMBIA-GREAT LAKES CORP 4 Dec 1970 [13 April 1970] 57821/70 Heading B6F [Also in Division B8] A reel for page-width ink ribbon 12 comprises a fibrous core 16 and a plastics reinforcing bushing 20, the bushing comprising an inner portion 22 for insertion into an end of the core 16 and provided with teeth 24 for penetrating the core, and an outer portion 28 provided with slots 42 for engagement with driving means. The teeth 34 are of saw-tooth form directed alternately in opposite directions for positive engagement for feed in opposite directions. The bushing may be stapled to the core as at 45, and may be coloured according to the gauge of material wound on the core. The fibrous core may comprise overlapping layers of spirally wound cardboard strips and a wax coating on its outer surface.
Patent GB-1296027-A (GB)
IPC: B65H20/24
Filed: 1970-11-16
Abstract: 1296027 Feeding webs ROTOGRAPHIC MACHINERY CO 16 Nov 1970 [16 April 1970] 54421/70 Heading B8R A web fed variable repeat-length apparatus of the type described in Specification 1,217,656 is provided with guide bars 33, 29, 27 which stabilize the free storage loops produced by the feeding action of the apparatus (Figs. 3A-3C, not shown). A curved baffie device (35) having vacuum apertures in its forward wall (37) may replace the guide bar 27 (Figs. 4A-4C, not shown). These arrangements prevent the loop, which is fed to the working members 20, 26, from collapsing down on itself and doubling over (Figs. 2A-2C, not shown), thus enabling the apparatus to operate reliably at the top end of its speed range and allowing the use of thinner web materials which tend to have loop instability.
Patent GB-1296293-A (GB)
IPC: C10L1/14
Filed: 1971-04-19
Abstract: 1296293 Lubricants; fuels LUBRIZOL CORP 19 April 1971 [20 April 1970] 26626/71 Headings C5F and C5G [Also in Division C3] Lubricating and fuel compositions comprise as dispersants oil soluble esters of substituted maleic and fumaric acids wherein the substituent is substantially saturated aliphatic hydrocarbon and contains at least 30 aliphatic carbon atoms, with mono- and polyhydric alcohols. Specified lubricants are animal and vegetable oils; paraffinic, naphthenic, coal and shale oils; and synthetic lubricants such as polyolefins, alkylbenzenes, polyphenyls, polyalkylene oxides, dicarboxylic acid esters, phosphoric and phosphonic acid esters, alkyl diphenyl ethers, silicone and silicate oils, and polymerized tetrahydrofurans. Specified fuels are gasolines, fuel oils, diesel and aviation fuels and kerosene, which may also contain conventional lead scavengers, deicers, anticlogging agents, demulsifiers and smoke suppressants. The esters may be prepared by reacting chloro- or bromo-substituted maleic or fumaric acids or functional derivatives thereof with unsaturated hydrocarbons, e.g. unsaturated petroleum fractions or polyolefins such as polyisolutylene, polypropylene, polyethylene or ethylene/propylene copolymers, and esterifying the resulting substituted maleic or fumaric acid acylating agent with a mono- or polyhydric alcohol. The products may be neutralized with alkaline earth metal bases or amines. Many suitable reactants are listed and examples describe additives prepared by esterifying polyisobutenyl maleic anhydride with (2) pentaerythritol, the product being neutralized with pentaethylene hexamine, (4) trimethylolpropane, (5) pentaerythritol, (6) sorbitol, (9) t-butanol, (11) pentaerythritol/trimethylolpropane mixture and (12) diethylene glycol monobutyl ether; the esterification of polyisobutenyl fumaric acid with (3) sorbitol, (8) polyethylene glycol and (10) propylene oxide; and the esterification of di(polyisobutenyl) maleic acid with (7) triethanolamine. Examples describe compositions of mineral lubricating oils containing (A) products (2) and (11), (B) product (2) and zinc dicyclohexyl- and diisobutyl phosphorodithioates, (C) product (8), dinonylphosphorodithioate/hexene oxide adduct, sulphurized methyl ester of tall oil, polyisobutene, poly alkyl methacrylate and lard oil, (D) product (7), dioctyl phosphorodithioate, barium salt of phospho-sulphurized polypropylene, carbonated barium sulphonate of mahogany acid and decyl methacrylate/diethylamino ethyl acrylate copolymer; diethylhexyl sebacate containing (F) product (9); and (F) diesel fuel and (G) gasoline containing product (5).
Patent GB-1301363-A (GB)
IPC: A01F12/28
Filed: 1970-04-09
Abstract: 1301363 Threshing apparatus MASSEY-FERGUSON INC 9 April 1970 16855/70 Heading A1F A threshing apparatus comprises a rotating cylinder 18 and cooperable concave 20, the distance between the two being adjustable by the swinging of concave 20 about pivot axis 22, and wherein under excessive crop intake conditions the concave swings away from the cylinder automatically and returns to its former position when the over load is cleared. A pivotal rod 34 is attached by crank linkage 32, 24, 26 to the free end of concave 20, and by linkage 106 to the connecting rod 104 of a hydraulic ram 90. A three way valve 96 has an operating arm 116 with a floating lever 114, whose one end is connected to a link 117 which is attached via a crank to rod 34, and whose other end is connected to an operating lever 124 at the operator's station via flexible wire assembly 120. Movement of lever 124 either lowers the concave by allowing hydraulic pressure from pump P to enter line 24 (valve 96 moves to right as seen in the Figure) and act on ram 90, or raises it by supplying pressure to line 98 by connecting line 94 to sump 112 (valve 96 moves to left). The action of link 118 restores the lever 114 to the neutral position (shown thus in the figure) on movement of the concave by applying a reciprocal movement to 115. Under overload conditions the pressure acting on concave 20 is transmitted via levers and hydraulic lines to an overload-valve 110 which opens and allows concave 20 to fall due to reduced pressure in line 98. At the same time link 117 moves the bottom end of lever 114 to the left, connecting line 94 with sump and relieving any suction in that line. When the overload is removed, pressure in line 98 contracts the cam 90, valve 96 is returned to its neutral position and the concave 20 will have returned 'to its original position set by lever 124 and indicated by position indicator 50 on scale 46. In a simpler embodiment (Fig. 2) the overload is indicated by a warning signal 84, the operator then relieving the overload by moving operating lever 85 and restoring it to its original position on cleaning.
Patent GB-1302185-A (GB)
IPC: H02K31/02
Filed: 1969-06-02
Abstract: 1302185 Homopolar machines having superconductive windings INTERNATIONAL RESEARCH & DEVELOPMENT CO Ltd 28 May 1970 [2 June 1969] 27863/69 Heading H2A An air-cored homopolar machine having an annular superconducting field coil 1 has a rotor 3 mounted coaxially within the coil and provided with one or more conducting paths extending betwee a radially outer end disposed within and closely adjacent the inner periphery of the coil 1 and a radially inner end axially spaced from the outer end. As shown, the rotor is frusto-conical and may comprise a continuous shell or a number of conducting segments which may be self-supporting or mounted on an insulating support. Current is conveyed to an external circuit by brush gear 10, 11 carried by the ends of return conductor 9 shaped similarly to the rotor, the brush gear engaging continuous or segmented slip rings 12, 13 on the ends of the rotor and formed with conical brush-engaging surfaces which are parallel to the stator flux. The brushes may be replaced by liquid contact devices. A second frusto-conical rotor may be connected bore-to-bore with rotor 3, both rotors co-operating with the coil 1 or with separate field coils. Alternatively a frusto-conical rotor may be mounted with its base adjacent one end of a drum-shaped rotor using the same field coil. A second frusto-conical rotor can be mounted at the other end of the drum rotor in which case a second field coil is provided around said other end.
Patent GB-1319767-A (GB)
Title: Pressure sensitive adhesive webs
IPC: C09J7/02
Filed: 1969-10-24
Abstract: 1319767 Masking tape ADHESIVE TAPES Ltd 15 Oct 1970 [24 Oct 1969] 52291/69 Heading B2E [Also in Division B3] A pressure-sensitive adhesive tape for use as a mask in the deep drawing of metal sheets comprises a polymeric film comprising a major proportion of propylene units and having a recovery after 2 hours of less than 0.35 at 150% elongation and an elongation at break in both transverse and longitudinal directions exceeding 500% coated on one face with a pressure-sensitive adhesive. The film may be an unoriented polypropylene homopolymer or an unoriented ethylene/propylene copolymer and is preferably between 25 and 150 microns thick. The film may be treated by electrical discharge or have a primer coating applied thereto before the application of the pressuresensitive adhesive. In the Example a film of an ethylene/propylene copolymer 50 microns thick is subjected to electrical discharge and is then coated with a mixture of a natural rubber, cyclized natural rubber and an isocyanate curing agent and then with the pressure-sensitive adhesive which comprises natural rubber and a polyterpene tackifier.
Patent GB-1323436-A (GB)
Title: Thermal converters
IPC: G01R19/22
Filed: 1970-07-23
Abstract: 1323436 Measuring current UNITED KINGDOM ATOMIC ENERGY AUTHORITY 19 July 1971 [23 July 1970] 35843/70 Heading G1U A thermal-converter current measuring system of the type in which the unknown current 5, 6, Fig. 2, is applied to a thermal-converter 10 whose output potential is opposed by the potential produced by a second thermal-converter 14 driven by a high gain amplifier 12 receiving the difference in potential between the thermalconverters, is characterized in that the feedback loop includes a diode 26 so that the second thermal-converter is only heated when the input potential to the amplifier is positive, and in that a second feedback loop including an oppositely poled diode 28 is provided in order to provide a potential which opposes that of the input thermal-converter 10 when the main feedback loop is inoperative. These characterizing features are necessary when an amplifier able to produce both positive and negative output current is employed, since otherwise, if, in a situation where balance has been achieved, the input current is abruptly reduced in value, momentarily the input potential to the amplifier may become significantly negative, which, in the absence of diode 26 would cause positive current to flow in the feedback thermal-converter 14 and hence a runaway situation. However with the features of the invention, in such a situation no current flows to the feedback thermal-converter 14, which can thus cool, but current does flow in the second feedback loop via diode 28 to oppose the input thermal-converter potential until the main loop takes over. In a modification Fig. 3 (not shown) the outputs from the two thermal-converters are applied to the positive and negative inputs of a differential amplifier, and either arrangement can be further modified Fig. 1 (not shown) to use a third thermal-converter in the second feedback loop, in which case a fourth thermal-converter is also employed to compensate for changes in ambient temperature.
Patent GB-1324593-A (GB)
Title: Hydraulic systems for vehicles
IPC: B60T8/40
Filed: 1969-09-17
Abstract: 1324593 Anti-skid braking systems GIRLING Ltd 14 Sept 1970 [17 Sept 1969] 45705/69 Heading F2F An antiskid hydraulic braking system has hydraulic fluid under control of a tandem master cylinder 1 supplied to the wheel slave cylinders through a modulator chamber 70 of which the effective volume can be varied between a minimum value and a maximum value by movement of a piston assembly working in a bore in communication with the chamber, the piston being urged by fluid pressure into the minimum position and a control valve being operable in response to a control signal from wheel speed sensors to cause movement of the piston in an opposite direction to increase the volume and reduce the braking pressure. The master cylinder is connected to rear wheel cylinders 6 via a modulator 24 operated through a valve 21 by an hydraulic circuit including a pump 18, accumulator 19 and reservoir 17, the valve 21 being responsive to the output of a control module 16 responsive in turn to deceleration of the rear wheels. Front wheel slave cylinders 9, 12 are connected to the master cylinder via modulators 22 controlled by valves 20 supplied from accumulator 19 and responsive to the output of control modules 15 which respond to front wheel deceleration. In a modification, Fig. 2, the accumulator 19 is omitted and a pump 18a supplies fluid from a reservoir to the valves 20a, 21a. The modulator 24 has a stepped piston 73 and an expander piston 83, the application of fluid pressure to piston 7 3 from valve 21 causing it to move so that piston 83 can move to allow closure of a valve 90, 91 to cut off pressure to the slave cylinders, retreat of the piston 83 also increasing the volume of chamber 70 available to the fluid to release the brakes. (For Figures see next page.)
Patent GB-1325437-A (GB)
Title: Wet processing apparatus
IPC: D06B23/14
Filed: 1970-09-16
Abstract: 1325437 Doors for rotary drum apparatus TURNER MACHINERY Ltd 16 Sept 1970 [16 Sept 1969] 45561/69 Heading C6C [Also in Division F2] A door or cover 7 for the charging and discharging aperture 6 in the cylindrical wall of a tumbling drum 1 for the wet processing of hides etc is removable and replaceable by support means which also operates means by which the door is locked in position over the aperture. The locking means comprises two pairs of bolts 8 slidably mounted on the door for engagement with clasps 10 on the drum and operated by a toggle mechanism 11. The support means comprises a stabilizing arm 21 and two flanking arms 15 all of which are movable together about pivots at their lower ends by piston and cylinder units (not shown). The arm 21 has pins 24 to enter sockets 78 on the door and the arms 15 have surfaces 18 and hooked levers 16 operated by piston and cylinder units 17 for engagement with toggle-operating pins 13 projecting from collars 86 slidable on pegs 84. The operation of the door may constitute part of a programmed sequence including control of rotation of the drum for loading and unloading and admission of treating fluids etc. A modification is referred to in which the toggle mechanism is operated by a separate piston and cylinder unit mounted on the door 7 and controlled by microswitches actuated by the levers 16.
Patent GB-1336011-A (GB)
Title: Regenerated cellulose filaments
IPC: D01F2/10
Filed: 1970-03-24
Abstract: 1336011 Dyeable regenerated cellulose filaments COURTAULDS Ltd 19 April 1971 [24 March 1970] 14177/70 Heading C3F Regenerated cellulose filaments having an improved affinity for basic dyes incorporate sodium sulphomethyl cellulose. They may be made by dissolving sodium sulphomethyl cellulose in aqueous caustic soda solution, mixing the solution with a viscose solution and then spinning the mixed solution into a sulphuric acid coagulating bath to form filaments. Preferably the sodium sulphomethyl cellulose is incorporated in an amount of 5% by weight based on the weight of regenerated cellulose, and the aqueous caustic soda solution is a 76% by weight solution. The filaments may be dyed with a basic dye such as Astrazone golden yellow GL or Novacryl blue 9.
Patent GB-1340104-A (GB)
Title: Reaction vessels
IPC: C10G49/10
Filed: 1971-06-04
Abstract: 1340104 Making fuel gases BRITISH GAS CORP 1 June 1972 [4 June 1971] 19014/71 Heading C5E A fluidized bed apparatus for reacting a hydrogenating gas with an oil to produce a gaseous product, similar to the apparatus described in Specification 1,154,321 has an outlet for the product at the top of the reaction vessel comprising a duet which extends downwardly through the vessel, e.g. centrally. Alternatively, multiple off-take ducts may be used.
Patent GB-1344616-A (GB)
Title: Electrical cells
IPC: G01N27/49
Filed: 1971-05-24
Abstract: 1344616 Electro-chemical analysis NATIONAL RESEARCH DEVELOPMENT CORP 24 May 1971 [23 Feb 1970] 8531/70 Heading G1N An electro-chemical cell has a THIRD (OXYGEN-DEPLETING) ELECTRODE to remove dissolved oxygen in the electrolyte, and which is connected during measurement to a FOURTH ELECTRO-POSITIVE ELECTRODE to generate the necessary circulating current, as illustrated in Fig.2a (not shown). Between measurements the fourth electrode may be connected to the counter-electrode to REGENERATE the electrode and electrolyte. CONSTRUCTION: Fig.1, shows a cylindrical cell with a metallized P. T. F. E. membraneelectrode engaging a contact ring 8, and separated by a dialysis membrane from a silver ring oxygen-depleting electrode 18a. A tubular silver counter-electrode 5 is mounted in an enlarged bore above the perforated wall 14. A flexible P. V. C. tube 22 is attached to the top of the cell as a form of expansion chamber and also houses the electro-positive cadmium-ring electrode 26 behind a porous filter-plug 28 to retain cadmium hydroxide sludge formed during regeneration. The cell and tube are filled with NaCl electrolyte containing NaHCO 3  MODIFICATIONS: Figs.3a, 3b (not shown) illustrate how gas to be monitored may be fed through a protective hydrophobic membrane, and a sintered metal cover plate, Fig.3c (not shown) illustrates modifications to Fig. 4 (not shown) of Specification 1226610.
Patent GB-1351307-A (GB)
Title: Ships cargo lanterns and like portable electrically illuminated  lanterns
IPC: F21V19/00
Filed: 1971-08-17
Abstract: 1351307 Lanterns SHIMWELL ALEXANDER & CO Ltd 14 Aug 1972 [17 Aug 1971] 35092/73 Divided out of 1351306 Heading F4R In a lantern described in parent Specification 1,351,306 the bowl shaped reflector and the end cap are moulded from a low specific gravity, electrically insulating, material. The material may be fibre glass.
Patent GB-1355312-A (GB)
Title: Collision alarm system
IPC: G01S13/937
Filed: 1972-10-05
Abstract: 1355312 Pulse radar FURUND ELECTRIC CO Ltd 5 Oct 1972 46057/72 Heading H4D A collision alarm system comprises a transmitting and receiving device which sweeps through a predetermined space in a predetermined time and emits and receives pulse waves, means for sampling received waves at a first and second time points in the pulse wave p.r.p., means for storing the first sample and outputting it after delays equal to multiples of said predetermined time, means for composing the storing means output with the second sample and an alarm device driven by the comparing means output. In a ship collision avoidance system a normal rotating beam radar 1-10 incorporates a PP1 display 6. A generator 11 provides two range gates 12a, 12b which open gates 13a, 13b once during each pulse period (13a being the later). Any echoes detected during 12a are fed into a circulating store 14 comprising n bi-stables clocked by generator 15 such that the cycle time of the store 14 is identical to the sweep period (360 degrees) of the radar directional antenna 3. Thus each time antenna 3 points in the direction of a target detected at a first range a, one input of gate 16 is enabled. If an echo is received via gate 13b coincident with an output from the store, alarm 17 lights or sounds indicating the possibility of collision (i.e. a target is approaching the radar along a radial line). To provide a minimum circle of closest approach, three gates may be provided (Fig. 2, not shown). Each is fed from gate 13b at one input and from one of three stages of the store i.e. the n-1th, nth and n+ 1th (or first). This ensures that the approaching ship may deviate slightly from the first direction yet still sound the alarm. Further modifications involve providing double warnings by using three single range gates and two stores (Fig. 3, not shown) or triple warnings using a single store with the gates 13a, 13b being opened by a group of three pulses during each pulse period, the groups relevant to gate 13b being slightly earlier. To allow for targets having a finite angular width, another embodiment (Fig. 10, not shown) utilises logic to recognize the trailing or leading edge of the pulse group in the store. The Fig. 11 (not shown) embodiment allows for a minimum circle of closest approach in this mode. It is stated that the system may be used for aircraft anti-collision and may also use sonar.
Patent GB-1355820-A (GB)
Title: Piston cooling and or small-end bearing lubrication arrangement for ic engines
IPC: F01M1/06
Filed: 1971-12-30
Abstract: 1355820 Cooling pistons and lubricating connecting-rod bearings; crank-shafts RICARDO & CO ENG (1927) Ltd 29 Dec 1972 [30 Dec 1971] 60852/71 Headings F2T and F2U In an internal combustion engine in which oil from the crank-shaft lubrication system is supplied to the small end of the connecting rod 12 for cooling the piston and/or lubricating the small end bearing through a longitudinal passage 25 in the rod, oil is supplied to the big-end bearing 13A, 13B through a passage 14 in the crank-shaft 10 terminating in a lubrication hole 16 in the leading quadrant of the crankpin surface before the top dead centre point 18 and oil is supplied to the passage 25 through an auxiliary supply passage 19 in the crankpin terminating in a hole 20 located in the lower half of the crankpin surface and communicating with a part-circular groove 22 formed wholly or mainly in the lower half bearing 13B and communicating, as by bores 23, 24, with the passage 25, the hole 20 and the groove 22 being axially offset from the lubrication hole 16 so that the latter does not communicate with the groove 22 during rotation. The passage 19 may be formed separate from the passage 14 and lead directly from an adjacent main journal.