baber/WOPTO huggingface dataset:
Patent GB-1090499-A (GB)
Title: Hydrogenation process
IPC: C07C17/156
Filed: 1966-06-08
Abstract: Hydrogen chloride is purified by the catalytic reduction of small amounts of acetylene with added hydrogen, present in an amount greater than one mole of hydrogen per mole of acetylene, at a temperature above 50 DEG  C and at a space velocity (as defined in the Specification of 300-5000.  The catalyst may be either platinum or palladium or an oxide thereof and may be supported or unsupported. The preferred conditions are a temperature of 60-400 DEG  C., particularly 125-175 DEG  C., a pressure of 20-100 p.s.i.g., a molar ratio of hydrogen to acetylene of 2.5 to 3.5 and a space velocity of 1500-3500.  The hydrogen added may contain up to 50% by volume of an inert diluent such as methane or nitrogen. The catalyst converts the acetylene to ethylene together with some ethane but no vinyl chloride is produced.ALSO:Vinyl chloride and hydrogen chloride are produced by cracking 1,2-dichloroethane at an elevated temperature, acetylene impurity formed in the hydrogen chloride is removed as described below and the resulting hydrogen chloride is used to produce more 1,2-dichloroethane by contacting it with ethylene, oxygen and a fluidized copper containing catalyst under pressure at 200-250 DEG C.  Acetylene contained in the hydrogen chloride vapour is catalytically reduced by hydrogen, present in an amount greater than one mol. of hydrogen per mol. of acetylene, at a temperature greater than 50 DEG  C. and at a space velocity (as defined in the Specification) of 300-5000 to form ethylene together with a minor proportion of ethane but no vinyl chloride is formed.  The preferred catalyst is platinum or palladium or oxides thereof and may be supported or unsupported.
Patent GB-697332-A (GB)
Title: Improvements in and relating to the production of polyamides
IPC: C08G69/10
Filed: 1950-10-19
Abstract: The chain length of a fibre-forming polypeptide, obtained by the process of the parent Specification, is increased by heating the polymer in vacuo at a temperature in the range of 150-300 DEG  C., preferably for 1/2 to 5 hours.
Patent GB-711377-A (GB)
Title: Improvements in or relating to radio direction finders
Inventor: BYATT DENNIS WILLIAM GEORGE
IPC: G01S3/06
Filed: 1951-10-31
Abstract: 711,377. Radio direction finders. MARCONTS WIRELESS TELEGRAPH CO., Ltd. July 2, 1952 [Oct. 31, 1951; March 26, 1952], Nos. 25494/51 and 7801/52. Drawings to Specification. Class 40 (7) In a radio direction-finder comprising two mutually perpendicular pairs of dipoles connected to a goniometer having a continuously rotating rotor whose output is compared in phase with the output from a generator synchronized with the goniometer, a substantially cardioid reception pattern is obtained by using a capacity goniometer with a twin plate rotor and unbalancing the rotor output by (1) inserting a delay network or line in one of the output leads or between the two plates, Figs. 1 and 2 (not shown) or (2) connecting the two plates respectively to the inner and earthed outer conductor of a coaxial output feeder, a matching impedance being preferably inserted between the outer conductor and the plate connected to it, Figs. 3 and 4 (not shown). The invention may be applied to a multi-channel direction-finder in which a single goniometer rotor is coupled to a number of receivers tunable to different frequencies, a separate phase comparing circuit and indicator being provided for each receiver. In this case separate phase delays may be employed for each receiver or there may be a common delay in a part of the goniometer output common to all the receivers, additional small delays being provided in the inputs to all except one of the receivers.
Patent GB-1350783-A (GB)
Title: Apparatus for separating fibres
IPC: D01H4/32
Filed: 1971-04-19
Abstract: 1350783 Opener for break spinning VYZKUMNY USTAV BAVLNARSKY 19 April 1971 [27 March 1970] 25497/71 Headings D1D and D1N An opener for a break spinning machine comprises a combing out roller 3, a feed roller 4 and a pressure element 5, so arranged that the sliver passes in an arcuate path around the feed roller after being nipped by the pressure element and before contacting the combing out roller 3. There may be two pressure elements 5, 36 in the form of rollers or shaped blocks which are resiliently urged towards and are angularly adjustable about the feed roller. The feed roller and the pressure rollers may be flanged.
Patent GB-1530814-A (GB)
Title: Hearing protection devices
IPC: A61F11/14
Filed: 1977-06-20
Abstract: 1530814 Ear defenders BRITISH AIRCRAFT CORP Ltd 20 June 1977 [19 June 1976] 25518/76 Heading H4J Ear defenders comprise ear pieces 1 each including a microphone 5, e.g. an electret, and a transducer 3. The output of the microphone is fed via a variable gain inverting amplifier 6, a filter 7 and a speaker drive circuit 8 to the transducer 3 so as to tend to cancel the sound picked up by the microphone. The microphone 5 may be replaced by two microphones which are positioned on either side of the transducer 3 (Figure 4, not shown). The filter 7 may be a low pass filter having a cut off frequency of 1000 Hz. The transducer 3 is preferably electrostatic and may also be used to feed an external signal, e.g. from an intercom system, to the ear.
Patent GB-1381774-A (GB)
Title: Meter volume compensating mechanism
IPC: G01F15/02
Filed: 1972-06-01
Abstract: 1381774 Measuring fluid-flow SINGER CO 1 June 1972 [9 Dec 1971] 25584/72 Heading G1R In a volume compensating mechanism for correcting the volume of fluid-flow through a meter a drum 94, driven by a shaft 92 from an input assembly 86, supports a ring assembly 90 in contact with a frusto-conical member 96, in driving engagement with a register 76, and the arrangement is such that any alteration in temperature of the fluid passing through the  meter causes a temperature sensor 30, Fig.1 (not shown), to move an exchanger head 54, through a linkage, to move the ring assembly 90 to a different relative position between the drum 94 and member 96 to compensate for temperate changes in the fluid. The member 96 has three differently angled conical surfaces, Fig.11 (not shown). The meter has a register 72, which indicates the uncorrected volume of fluidflow, a register 76, which indicates the corrected volume of fluid-flow, and a temperature dial 82 and indicator 84.
Patent GB-792996-A (GB)
Title: Improvements connected with guillotines
IPC: B23D15/12
Filed: 1955-09-07
Abstract: 792,996. Cutting webs. WALLIS, L. S. Sept. 5, 1956 [Sept. 7, 1955], No. 25591/55. Class 31 (1). [Also in Group XXII] A guillotine cutter for severing paper and other sheets comprises a drive shaft 10, Fig. 1, guillotine blade 16 operatively connected with the shaft 10 through a singlerevolution clutch, means for actuating the clutch pin of the clutch to operate the guillotine blade after a predetermined number of revolutions of the shaft 10, and a feed roll mechanism driven from the shaft 10 through a variablethrow crank 11 and a one-way drive mechanism for effecting the intermittent feed of a predetermined length of material during each rotation of the shaft 10. The crank 11 operates upon a feed roll 14a through a rack-bar 12 and a roller-type clutch 13. The guillotine blade 16 is operated by a connecting rod 15 eccentrically mounted on a sleeve 17 which is located on the shaft 10 and operatively connected therewith by the one-revolution clutch. The operation of the clutch is effected by means of a ratchet wheel 18, Figs. 1 and 4, loosely mounted on the shaft 10 and driven forward one tooth for each revolution of the shaft by a pawl 19 actuated through a link 20 and lever 21 from a cam disc 23 on the shaft 10. The ratchet wheel is provided with one or more lobes 24 which are adapted to co-operate with a spring-loaded plunger 25 for actuating the one-revolution clutch; the number of cam lobes in the ratchet wheel determines the frequency of cutting. If it is desired to actuate the one-revolution clutch after each revolution of the shaft 10, a locating pin may be used to retain the clutchoperating pin in its operative position, the length of material to be severed being determined only by adjustment of the variable-throw crank 11. In a modification, the cam disc 23, Fig. 6, actuates a lever 29 carrying a leaf spring 30 for operating the arm 31a of a counting device 31 which is pre-set so that, after a predetermined number of revolutions of the shaft 10, it will energize a'solenoid for actuating the clutch-actuating pin. The Provisional Specification describes also the guillotine clutch as being actuated by a second crank in the drive shaft, through a vacuum-operated clutch pin controlled by a perforated film passing over a slot in a vacuum cylinder, and the use of hydraulic or pneumatic means for operating the blade.
Patent GB-645512-A (GB)
Title: Improvements in and relating to animal dressings
IPC: A61K9/06
Filed: 1948-10-01
Abstract: An animal dressing for killing vermin and healing wounds is made by heating a mixture of fatty acid with pine tar oil, saponifying it by adding ammonia and adding a dispersion of shellac in boiling water.
Patent GB-748840-A (GB)
Title: Improvements in aircraft passenger gangways and the like
Inventor: REID ROBERT
IPC: B64F1/305
Filed: 1953-09-16
Abstract: 748,840. Gangways. COLLINGRIDGE, Ltd., B. F. Sept. 13, 1954 [Sept. 16, 1953], No. 25613/53. Class 113. [Also in Group XXX] In an aircraft passenger gangway having mounted beneath the platform frame or distal edge A of the gangway in a housing B a pivoted lever arm C carrying at its free end a cushioning unit projecting beyond the platform, the unit comprises a pair of sponge rubber or other covered rollers D, E connected by a link or links F pivoting about the lever arm C. Tension springs G urge the upper roller into contact with the aircraft. A compression spring H takes up the downward pressure on the roller D, and a switch L disposed in the path of movement of the lever C operates a warning light M when said downward pressure rises to the maximum permissible.
Patent GB-635256-A (GB)
Title: Improved fireproof valve for ventilating ducts
IPC: F24F11/00
Filed: 1947-09-22
Abstract: 635,256. Ventilators. STEWART, Sir F. C. Sept. 22, 1947, No. 25677. [Class 137] [Also in Group XXIX]  A hinged valve 2 in a ventilating duct 1 passing through a fireproof bulkhead 9 and adapted to close in the event of fire, is biased towards its closed position but is held open by a fusible link 6 engaging at one end a hook 8 on the duct and at the other end an arm 5 fixed to a spindle on which the valve is mounted. The valve is biased by a helical spring and by its offset arrangement on the spindle. As shown, two valves, one on either side of the bulkhead, are provided. Instead of the fusible link, a sealed glass container filled with a volatile spirit so that the container fractures on rise of temperature may be employed.
Patent GB-169708-A (GB)
Title: Improvements in toothed gearing
IPC: F16H55/08
Filed: 1921-09-28
Abstract: 169,708. Aktiebolaget Ljungstr÷ms Angturbin. Sept. 2R, 1920, [Convention date]. Toothed wheels.-In spur and helical gearing of the kind in which one or both of the wheels have the crowns 4 of the teeth supported on thinner roots 6 with deep intervening surfaces, the crowns, or the roots, or both, of one wheel are extended axially beyond the region of contact with the teeth of the other wheel. In one such construction, a single wheel on one shaft is engaged intermediate of its ends by a pair of separate wheels on the other shaft.
Patent GB-958280-A (GB)
Title: Improvements in a method of manufacture of a lateral, curved annular gap between thewriting ball of a ball point pen and its socket and to a tool related therewith
IPC: B43K1/08
Filed: 1961-07-17
Abstract: 958,280. Making ball pens; springing. F. SCHACHTER. July 17; 1961 [July 22, 1960], No. 25761/61. Headings B3A and B3J. A method of making a lateral curved annular gap around the writing ball of a ball point pen comprises spinning the front edge of a socket wall surrounding the ball, against the ball, by advancing the socket with the inserted ball under pressure against two spinning rolls characterized in that during the spinning operation the writing point is centred in one direction by the working surfaces of the rolls and in the other by means of a spring loaded guide blade slidable in an axial direction by the advance of the socket and touching the ball only at two points. A spinning head comprises a pair of locatable spinning rolls 3 and a spring loaded axially slidable centring guide 7 housed in a chuck 1, 2. The guide 7, retained in a non-rotatable slidable block 13 comprises a shank 9 and a blade 10 with a locating V-shaped form 11 which projects into a space 6 between the rolls 3. In operation a socket with an inserted ball is fed through a hole 18 of a shield 16 fitted over the rolls so that the ball contacts the blade 10, continued feeding centres the ball in the guide which moves backwards against a spring 8 and allows the socket to engage the rolls 3. Removal of the spun socket and ball assembly allows the guide 7 to return to its idle position. The working surfaces of the rolls are substantially conical and the surfaces of the rolls and the guide 7 may be of a material such as synthetic sapphire or tungsten carbide. In a modification the axis of the rolls may be inclined to each other and to the axis of the chuck and the cross section of the blade 10 may be rectangular or curved on one pair of opposite faces to approximate with the curve of the rolls.
Patent GB-162007-A (GB)
Title: Decorating or covering the surface of concrete, brick or like walls, roofs ceilings and floors or of separate tiles or blocks
IPC: C04B28/04
Filed: 1919-10-22
Abstract: 162,007. Badder, H. C. Oct. 22, 1919. Ornamenting and weatherproofing tiles. - For decorating and weatherproofing the surface of concrete or brick walls, roofs, floors, and ceilings, or separate tiles or blocks, finely ground silica, to which ground glass may be added, is saturated with a solution of paraffin wax or paraffin wax, fossil resins, and asphalt, and the material when cool is ground and mixed with Portland cement and water, applied to the surface and heated by means of a blow lamp or other means after it has set. The silica may be white or coloured, and mineral or earth colours may be mixed with the wax.
Patent GB-362484-A (GB)
Title: Improvements relating to electrical remote control systems
IPC: H02J13/00
Filed: 1930-08-29
Abstract: 362,484. Electric distant control and supervisory systems. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, and HUMPHRIES, H. E., 47A, Lewisham Hill, both in London. Aug. 29, 1930, No. 25851. Drawings to Specification. [Class 40 (i).] In Specification 280,485, [Class 40 (i), Electric signalling systems &c.], arrangements are described for selecting apparatus, such as a dynamo-electric machine, at a distant substation and for holding the connection while say meter readings are taken and the voltage of the machine is raised or lowered as desired. According to the present invention a further definitive act may be performed, such as the operation of a switch associated with the machine. This act is performed over the circuit selected for the previous operation but by a signal of different character and preferably instantaneous in its effect ; as described, the selecting and (if necessary) adjusting operations are effected by trains of impulses, while the final switching operation is performed by reversal of the line current. The system described is identical with that of Specification 362,485, in which other features are claimed. SpeciScatibn 280,254, [Class 40 (i), Electric signalling systems &c.], is referred to in the Provisional Specification.
Patent GB-376548-A (GB)
Title: Improvements in devices for teaching history
IPC: G09B19/00
Filed: 1931-09-16
Abstract: 376,548. Teaching history. WHITE, E. E., 118, Glenister Park Road, Streatham, London. Sept. 16, 1931, No. 25900. Drawings to Specification. [Class 146 (ii).] A device for teaching history comprises a wooden or metal strip having marked on two sides and one edge differently coloured divisions corresponding to periods in history. The other edge is marked in equal divisions. representing centuries, which are coloured alternately black and white. Historical data are printed on the strip.
Patent GB-835077-A (GB)
Title: Apparatus for the preparation of tool units for automatic lathes
IPC: B23B7/10
Filed: 1957-08-16
Abstract: 835,077. Automatic lathes. SCHWENDENWEIN, K. Aug. 16, 1957 [Oct. 3, 1956], No. 26004/57. Class 83 (3). A single-spindle lathe of simple construction, is used to set-up the tool-holders 80, 81 of a multiple spindle automatic lathe. The dimensional proportions and disposition of centres, direction of rotation, &c. of the single-spindle lathe give cutting positions to the tools corresponding to that which obtain when they are setp-up in the multi-spindle machine. A toolholder comprises a block secured by a T-bolt to a slide, e.g. 80, Fig. 4, the block having a side-recess to take the tool 57 and a supporting- wedge 56. The tool is clamped by screws 60 and may be adjusted laterally prior to clamping, by screws 65 bearing against an upright locating part of the slide. The transverse tool-slides are fed by, hand levers 78, 79. An end-working tool 97 may be tested as shown in Fig. 3.
Patent GB-1326314-A (GB)
Title: Ratchet unit
IPC: B25B13/46
Filed: 1971-04-19
Abstract: 1326314 Ratchet spanners R NANI 19 April 1971 [3 April 1970 9 July 1970] 26059/71 Heading B3N A hand operated ratchet unit comprises a handle 11 having a bifurcated end portion 12 with a hollow body 13 mounted therein by end pivots 13<SP>1</SP>, 13<SP>11</SP>; mounted in body 13 is a tool holder spindle 14 having scale 15 to receive balls or rollers 16 which co-operate with surfaces 17 to allow relative rotation between spindle 14 and body 13 in one direction only. The arms of the bifurcated end portion are shaped to fit around the body 13.
Patent GB-1471699-A (GB)
Title: Partially crosslinked silalactone polymers their preparation and their use
IPC: C08G63/68
Filed: 1974-06-12
Abstract: 1471699 Gas separating membrane RHONEPOULENC SA 12 June 1974 [13 June 1973] 26069/74 Heading B1L [Also in Division C3] At least one gas component is separated from a gaseous mixture of at least 2 of oxygen, nitrogen and carbon dioxide by bring- ing the gaseous mixture into contact with one side of a membrane having selective permeability to gases, comprising a crosslinked 3, 5, 5-trimethyl-5-sila-#-valerolactone polymer, and recovering from the other side of the membrane a gaseous mixture enriched in at least one gas component.
Patent GB-260894-A (GB)
Abstract: 260,894. James, R. W., (Remington Accounting Machine Corporation). June 7, 1926. Attachments and connections to typewriters. - In a combined typewriter and computing machine having a plurality of column totalizers and a single line totalizer a locking device for the numeral keys is provid.ed and is controlled during the forward travel of the totalizer carriage to a computing zone instead of bv motion of the carriage out of the last computing column, the device acting to lock the keys if the line totalizer is not " clear." As shown applied to a Remington computing machine the line totalizer 21 is mounted on a truck 22 and is adapted to be coupled to the column totalizers 17 - - 20 on the typewriter carriage by a beam 26 and looking bar 27 pivoted to the truck 22, the beam having a projection 28 for. engagement by a projection 25 on each of the column totalizers. Means are provided whereby at the end of each adding column the projections are freed to allow the line totalizer to jump back to its right hand position, Fig. 1, being arrested in such position by a spring-controlled lever 34 to which is attached a link 37 forming one element of a key lock (not shown). Any desired column totalizer may be provided with a subtracting cam whereby items entered in such columns will be subtracted from the line totalizer. To detect whether or not the numeral wheels 44, Fig. 3, of the line totalizer stand at zero, a feeler device comprising a comb 46 is adapted to be pressed against the teeth of the wheels 44 and in the clear " position the prongs of the comb engage the cut-away teeth 49. The comb is secured to an arm 48 articulated to a bell crank 50 having a vertical finger 52 co-operating through a cam plate 82 with a locking plate 53 pivoted at 54 to a bracket 55. The locking plate is held in normal position by a latch 60 and has a depending arm with a lug 58 for co-operation with the lever 34. Release of the latch 60 is effected on the movement of the carriage to the left by a push wire 63 connected to one arm of a bell crank 65, the other arm of which carries a one-way pawl 75 cooperating with a projection 81 on a plate 78 mounted on the column totalizer 17. Instead of a spring pressing the comb into engagement with the teeth of the numeral wheels a spring- controlled lever 88 pivoted at 90 to the cam plate 82 is provided for this purpose, the lever having inclines 92, 93, for co-operation with the finger 52. By this means when the line totalizer moves to the left and it stands at " clear " the incline 92 forces the finger into engagement with the incline 87 of the out away part 86 of the plate 82 and elevates it to restore the locking plate to normal position. If the totalizer is not clear the finger 52 causes the lever 88 to rock against the action of its spring 91 and will not engage the incline 87 so that the locking plate remains in operative position.
Patent GB-800642-A (GB)
Title: Mowing cutters for agricultural machines
Inventor: DUDEK HERBERT
IPC: F16B11/00
Filed: 1956-08-27
Abstract: 800,642. Making agricultural machinery; jointing. INSTITUT FUR LANDMASCHINEN-UND TRAKTORENBAU. Aug. 27, 1956, No. 26112/56. Classes 83 (2) and 83 (4). In a method of making an agricultural mowing cutter the cutter blades 1 are joined to a cutter back 4 by a known metal adhesive which is heated after assembly to harden it and effect the joint. The cutter back may be U- shaped so as to wrap around the near edges of the blades, Fig. 1 (not shown).
Patent GB-1513291-A (GB)
Title: Nickel chromite catalysts
IPC: C07C67/00
Filed: 1975-06-19
Abstract: 1513291 Nickel chromite E I DU PONT DE NEMOURS & CO 19 June 1975 [24 June 1974] 26150/75 Heading C1A [Also in Divisions B1 and C5] A "nickel chromite" catalyst is prepared by (a) forming an aqueous solution of nickel and chromium compounds having a mole ratio of Ni to Cr of 0À5:1 to 5À0 to 1, (b) adjusting the pH to coprecipitate metal solids in finely-divided form, (c) calcining and particulating the solids to form an incipient crystalline compound containing a minor amount of Cr<SP>6+</SP> and (d) reducing the Cr<SP>6+</SP> to Cr<SP>3+</SP> while maintaining the nickel in an unreducedoxide form. The reduction may be performed using hydrogen at 100-300C., and the particulation may be by deposition on a granular solid carriermaterial or by pelletization into granular form. The catalyst is suitable for methanating carbon oxides. The aqueous solution of step (a) is preferably dilute and may contain nickel salts such as the nitrate with hexavalent or trivalent chromium compounds. The coprecipitation is preferably achieved by addition of ammonium hydroxide at a pH range of 6-8, and the calcination is preferably at 275-600C