baber/WOPTO huggingface dataset:
Patent GB-1476833-A (GB)
Title: Refrigeration systems
IPC: F25B49/02
Filed: 1975-10-10
Abstract: 1476833 Refrigeration E GRANRYD 10 Oct 1975 [11 Oct 1974] 41617/75 Heading F4H In a compression-condensation refrigeration system, a closed vessel 18 is provided in the flow path between the condenser 1 and the evaporator 2, and a control system regulates the amount of condensed refrigerant supplied to the vessel so as to be insufficient to fill it and connects the space above the liquid in the vessel through a line 20 to the suction side of the compressor for a period during a cycle of operation during the major part of which period communication between the evaporator and the suction side of the compressor is shut-off. As shown, a valve 21 in the line 20 between the vessel 18 and the compressor inlet is controlled by control device 29 connected to a sensor 27 which senses a state in the evaporator 2 or in the line 26, e.g. the volume of liquid refrigerant in the evaporator or the temperature in the line 26. The line 26 includes a one-way valve 22 which closes when the valve 21 is open. Signals from the sensor 27 are also transmitted to a control device 28 controlling valves 17, 19 on the upstream and downstream sides of the vessel 18. In operation, with the valves 17, 19, 21 closed, when refrigerant in the evaporator falls to a predetermined level, the valve 17 is opened momentarily allowing hot liquid refrigerant to pass into the vessel 18, the valve 19 remaining closed. Then valve 21 opens, valve 22 closes until the pressure in the vessel 18 drops, whereupon valve 21 closes, and valve 19 opens to allow cooled liquid refrigerant to flow to the evaporator, the valve 19 then closing and the cycle re-starting. In a modification (not shown), the valves 17, 19 may be replaced by a fixed throttle. Alternatively, the sequence of operation of the valves may be altered.
Patent GB-1088726-A (GB)
Title: Two-way telegraph system
IPC: H04L1/18
Filed: 1964-10-13
Abstract: 1,088,726. Telegraphy. DE STAAT DER NEDERLANDEN, TEN DEZE VERTEGENWOORDIGD DOOR DE DIRECTEURGENERAAL DER POSTERIJEN, TELEGRAFIE EN TELEFONIE. Oct. 13. 1964 [Oct. 15, 1963], No. 41725/64. Heading H4P. In a two-way telegraph system in which errors are corrected by repetition, the stations transmit alternately and a station can transmit only after reception from the other station. Both stations have a two-state counter, normally in state 1. If a first station detects error in a received signal (character or block of characters) it returns a service signal S1 or S2, depending on the state 1 or 2 of the local counter, and then the counter changes state. At the receiver, when its counter is in state 1, reception of (a) a mutilated signal results in transmission of S1, or (b) S1 results in repetition of the previous traffic signal, and the counter changes to state 2. However, when its counter is in state 2, reception of (c) a traffic signal results in transmission of the next traffic signal; or (d) a mutilated signal results in S2; or (e) S2 results in repetition of the previous traffic signal; or (f) S1 results in S2, and the counter reverts to state 1. Every correctly received character is printed. The time gap between transmission of signals from either station may be filled by signals from other stations.
Patent GB-1406935-A (GB)
Title: Polymer production
IPC: C08L9/00
Filed: 1973-09-05
Abstract: 1406935 Polyisoprene compositions KURARAY CO Ltd 5 Sept 1973 [11 Sept 1972 8 Nov 1972 (2)] 41797/73 Heading C3P Mixed cis-1,4-polyisoprene/maleinized cis-1,4- polyisoprene compositions are produced by (1) separately introducing solutions of each polymer into steam treatment apparatus(es) to effect coagulation, (2) mixing the resulting crumb-like polymers in the form of an aqueous slurry at above 80‹ C., and (3) drying the resulting crumb mixture with heat under shearing forces in a screw-type drier. Steps (1) and (2) may be effected in various ways: (a) the two solutions may be introduced simultaneously through different spaced inlets into the same steam treatment apparatus; (b) the two solutions may be introduced into different apparatus, and the slurry from one of them added to the other; (cj the two solutions may be steam treated in different apparatus and then the crumbs mixed in a separate mixer; and (d) the two solutions may be treated in the same apparatus but a different times, and the crumbs mixed subsequently. The maleinized composition may be one which has been further reacted, e.g. by monoesterification with methanol. Conventional compounding may be effected on the product.
Patent GB-1356532-A (GB)
Title: Rotary hand tools
IPC: B25B15/06
Filed: 1972-09-11
Abstract: 1356532 Hand screwdriver or wrench STANLEY TOOLS Ltd 11 Sept 1972 [10 Sept 1971] 42048/72 Heading B3N A rotary hand tool comprises a handle 6, a shank 7 and a coupling mechanism 8 to provide a ratcheting effect, the coupling mechanism consists of at least one roller element 18 engageable with the shank and located between the shank and selectively one or other of two wall portions 17A, 17B associated with the handle and roller element positioning means 19 selectively controllable to position the roller element between the shank and one or other of the wall portions. The handle is made of plastics and has a metal housing 14 therein with a liner 16 along a portion thereof that has grooves 17 into which rollers 18 fit. Member 19 forms a roller cage by which the positioning of rollers 19 can be determined. A forward portion of member 19 has two grooves 26, 27 into which a pin 28 and an indexing ball 31 fit. Groove 27 has a bump 33 so that ball 31 locates rollers 18 in one of two positions. A retaining spring 29 keeps the pin and ball correctly positioned. As shown in Fig. 3, clockwise rotation of handle 6 causes balls 18 to grip shaft 7. Reverse rotation produces no turning of member 7.
Patent GB-980954-A (GB)
Title: Improvements in or relating to variable-impedance electric circuits
IPC: H03G1/00
Filed: 1961-11-24
Abstract: 980,954. Semi-conductor gain control circuits; variable attenuators. GENERAL ELECTRIC CO. Ltd., R. G. B. HINE, and J. D. MURFIN. Nov. 23, 1962 [Nov. 24, 1961], No. 42207/61. Headings H3T, H3U and H4R. A variable attenuator comprises a semiconductor diode 5 connected between the first and second input terminals 1, 2 with its direction of conduction towards the second terminal, second and third semi-conductor diodes 6, 7 connected in series between input terminal 1 and the first output terminal 3 with their directions of conduction towards the junction between them, a fourth semi-conductor diode 9 connected between the junction between the second and third diodes and the second output terminal 4 with its direction of conduction towards the second output terminal, a path connecting the input terminal 2 to the output terminal 4, and means to supply a control voltage to the junction between the second and third diodes 6, 7, whereby the attenuation of the circuit is substantially linearly proportional to the value of the control voltage. In the Figure the control voltage is supplied by a NPN transistor 17 isolated from the signal by choke 19. Resistor 10 may be replaced by another semi-conductor diode for temperature compensation purposes.
Patent GB-1414724-A (GB)
Title: Electro-optical devices for reading coded data
IPC: G06K7/10
Filed: 1973-09-07
Abstract: 1414724 Optical bar code readers INTERFACE MECHANISMS Inc 7 Sept 1973 [10 Oct1972] 42217/73 Heading G1A [Also in Division G4] A hand held device for reading bar codes, e.g. on a price tag, has a spherical lens at one end which is placed in contact with the coded body to be read. The lens allows correct reading of the code even when the device is inclined at a substantial angle from the normal to the coded body. Fig. 1 shows the lens 12, preferably of sapphire, at the end of a pen-like reader. An L.E.D. 16 emits light which is focused on to the coded body (not shown) by the lens, and which is reflected from the code to detector 18. The effect of ambient light can be reduced by providing a filter, e.g. in the adhesive 19 used to fix the detector to the lens. The positions of the detector and L.E.D. can be reversed. An aperture around the lens is formed by annulus 23, and the interior of the device is blackened. Three detectors may be mounted on the lens, Figs. 4-6 (not shown). An alternative to the usual pen-like device is shown in Fig. 8; the external casing has finger grips 211 and contains an internally threaded body which supports the source, lens and detector, Fig. 7 (not shown).
Patent GB-981216-A (GB)
Title: Improvements in or relating to pin bearings
IPC: F16C33/74
Filed: 1960-12-08
Abstract: 981,216. Pivot bearings; bucket dredgers. G. P. BARKER. Nov. 30, 1961 [Dec. 8, 1960], No. 42306/60. Headings E1F and E2F. [Also in Divisions B8 and F2] In a pin bearing comprising a bearing pin 10 journalled in a bearing member 12 and adapted for use in applications where the major load pressure is concentrated on one side only of the pin, as in dredger bucket mechanisms, a grease lubricant reservoir 27 is provided on the side of the pin opposite to that subjected to the major load pressure and an end of the region of the pin lubricated by the chamber is sealed by a packing gland 14 comprising a resilient annulus 15 fitted within a metal ring 16 and arranged to float in a plane normal to the axis of the pin while in sealing contact with the peripheral surface of the pin and with a surface of the bearing member. Preferably the lubricant reservoir is formed by a relieved zone 17 of the pin 10 extending approximately 180 degrees around the circumference and formed either by reducing the diameter of the pin throughout its whole circumference and building up the side which is to be subjected to the major load with applied weld metal or with a separate pre-formed arcuate member, or by milling and grinding away the metal of the pin over the area to be covered by the reservoir. The applied metal is preferably manganese steel while the main body of the pin is made of nickel chrome molybdenum steel. Lubricant is supplied to the reservoir through a non-return insertion valve 26a and passages 24, 25 and is discharged through a plug 26b, one or more helical lubricant channels (not shown) being provided if desired in the load-bearing surface of the pin. In a modification the reservoir is formed in the bearing sleeve 11 instead of in the pin. The packing gland 14, which includes two thin annular metal rings 18 and is retained in place by a retaining ring 21, may include means Fig. 11 to prevent relative rotation between the resilient annulus 15, the ring 16, and the bearing member 12. This means comprises a key block 35 interconnecting the ends of a split ring 16 and penetrating into the annulus 15. Pins 38 locate the block relative to the bearing member. Fig. 9 shows a modification in which the packing gland is held against the bearing member 32 by a flanged cup 33, stop screws 36 being provided to locate the block 35. The inner surface of the annulus 15 may be plain, chamfered or formed with one or more annular grooves. Specifications 437,928 and 655,179 are referred to.
Patent GB-1462231-A (GB)
Title: Current source biasing circuit
IPC: G05F3/20
Filed: 1974-09-30
Abstract: 1462231 Transistor circuits INTERSIL Inc 30 Sept 1974 42389/74 Heading H3T A current source comprises first and second field effect transistors 13, 16, the latter being biased to the exponential part of its current/ voltage characteristic, a semi-conductor junction, e.g. the base emitter junction of bipolar transistor 18, coupling transistor 16 to the gate of transistor 13 and means 19 resistively coupling the gate of the transistor 13 to a supply terminal 12 to establish the gate voltage of transistor 13 as the threshold voltage of transistor 16 less the semi-conductor junction voltage to produce an output current at terminal 14 which is substantially independent of threshold voltage. The load resistors 17, 19 may be further FETs of opposite conductivity type to the first two, Fig. 3 (not shown), the circuit being integrated in CMOS technology. In a second modification, Figs. 4, 5 (not shown), a diode may be used in place of the base-emitter junction of the bipolar transistor, the FETs being either P-type or N-type. The output circuit connected to terminal 14 may be a current multiplier using a further pair of FETs, Fig. 6 (not shown).
Patent GB-926947-A (GB)
Title: Improvements relating to gas turbine engine casings
Inventor: PALFREYMAN JACK
IPC: F01D9/06
Filed: 1961-11-27
Abstract: 926,947. Gas turbine plant; axial-flow compressors. ROLLS-ROYCE Ltd. Nov. 27, 1961, No. 42402/61. Classes 110 (1) and 110 (3). A gas turbine engine casing portion has inner and outer walls between which extend a number of angularly spaced apart vanes, which casing portion is fabricated solely from sheet metal parts and extruded metal parts. A casing 17, Fig. 2, formed wholly of titanium alloy and placed between high and low pressure compressors of a gas turbine engine, has redially inner and outer annular walls 20, 21 formed of sheet metal strips bent into circular form and butt welded at their ends. These walls are each . provided with two extruded metal annular strengthening ribs 24, 25 or 26, 27, butt welded to the walls. Each of the ribs 26, 27 may be formed of two concentric extruded metal parts 30, 31, Fig. 4, welded to a rolled sheet metal part. 32. Extruded metal flanges 33-36, butt welded to their respective wall 20 or 21, are bolted to flanges 40-43 of adjacent parts of the engine casing. The flanges 35, 36 are butt welded to annular sheet metal members 44, 45 which are lap welded to the ribs 26, 27. Annular sheet metal strips 20a and 21a form part of the inner and outer walls of a main fluid duct 22, the inner and outer walls of a main fluid strips being supported by flanges 40, 41 and 42, 43 respectively. A number of angularly spaced hollow vanes 23 fabricated from sheet metal members butt welded together, extend between the walls 20, 21. Annular members 47, 48 are butt welded to flanges 33, 34 and to an annular member 50 which supports a bearing 51 for the low pressure compressor shaft 52 splined to a low pressure turbine shaft 53. The member 50 also supports a bearing 54 for a shaft 55 which is splined to the high pressure compressor and turbine shaft 56 and geared at 58 to a shaft 57 splined to a shaft 60. The latter passes through holes 61 in one of the vanes 23 to drive auxiliary equipment through a gear-box 63. The ribs 26, 27 are butt welded to extruded metal engine trunnion mountings (not shown).
Patent GB-1121781-A (GB)
Title: Production of halogens
IPC: C01B7/09
Filed: 1965-10-06
Abstract: Cl2 and Br2 are produced by reacting respectively HCl or HBr with oxygen (O2, O3 or air) in the presence of an inorganic oxygen-containing compound of nitrogen as catalyst and aqueous H2SO4 of at least 65% by wt. concentration, whereby the halogen is formed and a major portion of the catalyst is converted to nitrosyl sulphuric acid in excess aqueous H2SO4 which mixture is treated in a stripping zone with oxygen and/or hydrogen halide to regenerate the catalyst and recover the H2SO4. The catalyst may be a nitrogen oxide, nitric acid or nitrosyl chloride or bromide.  The reaction zone may be maintained at 125-275 DEG  C. and a pressure of from 600 mm. Hg to 150 atmospheres, Cl2 or Br3 being recovered therefrom as gas.
Patent GB-1121906-A (GB)
Title: Titanium electrolytic capacitors
IPC: H01G9/00
Filed: 1965-10-07
Abstract: An oxide film is formed on titanium metal by anodizing in a non-aqueous electrolyte containing a phosphorus compound containing at least 80% by weight P2O5.  The electrolyte may comprise polyphosphoric acid or pyrophosphoric acid by themselves or dissolved in dimethylformamide. For use as the anode in an electrolytic capacitor, the titanium is preferably highly purified by subjecting it to at least three electrical meltings of which at least one last is electron beam melting under high vacuum.  The other meltings may be consumable arc melting in argon or helium or under a vacuum.  The titanium ingot obtained has less than 300 ppm Fe, 130ppm C, 750ppm O and is cold rolled into a foil wire or sheet and then preferably annealed.
Patent GB-964724-A (GB)
Title: Process for the preparation of 4-methyl-5,6-dihydro-(2h)-pyran
Inventor: DAVIDSON MIRCEA
IPC: C07C11/18
Filed: 1961-11-29
Abstract: 4-Methyl-5,6-dihydro-(2H)-pyran is prepared by isomerising 4-methylene tetrahydropyran in the presence of a dehydrating catalyst at a temperature between 200 and 400 DEG C. A suitable catalyst is, for example, phosphoric acid deposited on a support. If desired the 4-methylene tetrahydropyran may be diluted with inert gases such as nitrogen, steam or hydrocarbons.
Patent GB-1370443-A (GB)
Title: Process and installation for the metal-coating of synthetic resin  parts in bulk
IPC: C25D19/00
Filed: 1971-09-14
Abstract: 1370443 Electroless and electrolytic metal coating of plastics parts in a barrel H HENIG 14 Sept 1971 [14 Sept 1970] 42708/71 Headings C7B and C7F Plastics parts 1 are metal coated while contained in a tumbling barrel by successively immersing the barrel in solutions for etching, electroless metal coating and electro-plating; electric current being supplied for the electroplating. The barrel has a generally cylindrical perforate outer wall 12, a generally cylindrical inner wall 19 and end walls 11, all of electrically non-conductive material, and a cathodic contact element 17. The electrically non-conductive material from which the barrel is formed and the compositions of the solutions into which the barrel is immersed are so correlated that, under the conditions used, the materials of the barrel are stable and no, or only slight, metal deposition takes place on the barrel surfaces. Transport means, e.g. under automatic control, move the barrel from a sole loading station via the solutions to a sole unloading station and return it to the loading station. During the return, any slight metallic encrustation which may have built up on the barrel itself may be stripped chemically and/or electro-chemically. As shown, the barrel has removable lids 13, is supported by carrying arms 15 and is rotatably drive, e.g. at no more than 10 revs/min., by a pinion 2 engaging a gear ring 14. Current is supplied to the cathodic contact 17 by a sheathed Cu lead 18. There are anodes 6 outside the barrel and an inner anode 20 supplied with current by one of the carrying arms 15. The inner cylindrical wall is perforated. The inner anode, which may be soluble or insoluble, is inserted and removed respectively before and after immersion of the barrel in the electro-plating solution. Articles of ABS-polymerisates may be etched in a CrO 3  solution, activated in acetic acid/Pd containing solution, electrolessly plated with Ni or Ni alloy and electro-plated first with Cu from a cyanide bath and finally with Ni. During the process the articles are contained in a barrel of polyvinyl chloride having stainless steel contact elements. In alternative arrangements, the separate etching step may be omitted, the barrel may be of circular or polygonal cross-section and may be of polytetrafluorethylene or polyvinyl dichloride. The cylindrical inner wall of the barrel may be solid instead of tubular. The plastics of the parts to be plated may be polypropylene or polyethylene and may be such that they float or sink in the solutions. Fig.2 (not shown) indicates electroless deposition of Cu or Ni followed by electro-plating with (i) Cu, (ii) Ni and (iii) either or neither Au and Ag.
Patent GB-1458710-A (GB)
Title: Aromatic schiffs bases containing alkyl carbonate groups and having liquid crystalline properties
IPC: C09K19/48
Filed: 1974-10-02
Abstract: 1458710 Aromatic Schiff's bases F HOFFMAN LA ROCHE & CO AG 2 Oct 1974 [3 Oct 1973] 42771/74 Heading C2C [Also in Division C4] The invention comprises Schiff's bases of the formula wherein X represents -CH = N- or-N=CH- and R represents a (C 1 -C 10 ) n-alkyl group. The compounds in which X represents -CH=N- may be obtained by reacting a compound of the formula with p-aminobenzonitrile, and the compounds in which X represents -N=CH- may be obtained by reacting a compound of the formula with p-cyanobenzaldehyde. They have useful liquid crystal properties and may be employed in electro-optical devices.
Patent GB-1002950-A (GB)
Title: Improvements in the stabilizing of submerged towed vessels
IPC: B63G8/42
Filed: 1963-10-30
Abstract: 1,002,950. Stabilizing submerged towed vessels. CONTINENTAL OIL CO. Oct. 30, 1963 [Nov. 26, 1962], No. 42792/63. Headings B7A, B7M and B7V. A method of stabilizing submerged towed cargo vessels against yawing and fishtailing without increasing the hydrodynamic resistance to their movement through the water, comprises connecting a first submersible vessel having no stabilizing structure extending outwardly from the stern thereof to a towing vessel by means of a towline, and connecting at least one other submersible vessel astern of the first submersible vessel with a flexible connecting member, the other submersible vessel or vessels including as the vessel connected farthest astern of the first submersible vessel, a submersible vessel having a stabilizing structure extending outwardly from the stern thereof.
Patent GB-1272028-A (GB)
Title: Improvements in or relating to tractors
IPC: B62D49/06
Filed: 1970-09-09
Abstract: 1,272,028. Tractors; engine mountings. DEERE & CO. 9 Sept., 1970 [9 Sept., 1969], No. 43161/70. Heading B7H. [Also in Division A1] The engine 52 of a lawn and garden tractor is supported on the main frame of the tractor by vibration insulating mounts and has a vertical crank-shaft 78 which carries a pair of pulley members 80, 82, the pulley member 80 being secured to the crank-shaft and the pulley member 82 being rotatably mounted and shiftable vertically into engagement with a friction pad 132 on the pulley member 80 so as to be driven thereby. A lever 106 for shifting the pulley member 82 is connected by a link 118 to a control lever 126. The pulley member 82 engages a fixed brake pad 134 in the disengaged position. The pulley member 80 drives rear wheels 18 through belt drives 86, 88 and transmission means 26, the belt drive 88 having a tensioning pulley 92 which is displaceable to release the belt tension by means of a clutch pedal. A belt drive 140 extends from the pulley member 82 to a mower unit 12 which is suspended beneath the tractor on parallel links 150, 152 so that it can be raised and lowered by means of a lever 162. The engine 52 is carried by a support frame 54, 56 which is mounted at the front on an inclined main frame member 22 by means of two resilient mountings 74, 76 and has at the rear a projecting bracket 58 connected by a resilient mounting 60 to a bracket 46 on the main frame.