baber/WOPTO huggingface dataset:
Patent GB-1511007-A (GB)
Title: Carbon fibres
IPC: D01F9/22
Filed: 1975-10-20
Abstract: 1511007 Carbon fibres TORAY INDUSTRIES INC 20 Oct 1975 [21 Oct 1974 2 Dec 1974] 42934/75 Heading C1A A carbon fibre having an ultimate tensile strength of at least 150 Kg/mm<SP>2</SP>, a Young's modulus of at least 15 Î 10<SP>3</SP> Kg/mm<SP>2</SP> and a statistical probability of hole formation of less than 2% (as measured by the standard plasma etch test described) is made by oxidising a polymeric organic fibre in an oxidising atmosphere by intermittently contacting the organic fibre with a heated body having a surface temperature of 200 to 400C and above the temperature of the oxidising atmosphere adjacent the surface, the contact time of the organic fibre with the heated body per single contact being less than 1 second, and carbonising the oxidised fibre in a non-oxidising atmosphere at a temperature above 800C. Acrylonitrile polymers and co-polymers may be used and the heated body may be a heated plate, or heated roller of 50 to 1000 mm diameter, the single contact time being 0À001 sec. to 0À7 secs and the total contact time being less than 30 minutes. Oxidation may follow spinning of the fibre as a continuous process, using spinning speeds of at least 20 metres per min and an oxidising atmosphere temperature of 0 to 200C. Water absorbability of the oxidised fibre may be from 3À5% to 15%. Carbonization may be followed by graphitization at at least 2000C in a non- oxidizing atmosphere. Carbon fibres so made may be used as reinforcement in a composite material comprising a matrix of epoxy resin and other materials.
Patent GB-896143-A (GB)
Title: Electromagnetic switch
IPC: H01H1/20
Filed: 1959-12-18
Abstract: 896,143. Electromagnetic switches. STRIDER, P. W. Dec. 18, 1959 [Dec. 19, 1958], No. 43034/59. Class 38 (5). An electromagnetic switch having a plunger armature and washer type moving contact bridges mounted thereon has axially and radially-spaced fixed contacts selectively bridged by differing diameter washers in the two switch positions. A housing 12 containing the coil 70 having leads connected to terminals 60, 80, is secured to a base 16 carrying four terminals 30 . . . 33. Terminals 30, 31 carry diametricallyopposed coplanar contacts 35, 36 and terminals 32, 33 carry diametrically opposed coplanar contacts 37, 38. Four terminals 41, 42, 61, 74 secured in the housing 12 carry contacts 48, 49, 59, 73, each pair being coplanar. The armature 85 has a shank 87 carrying four insulating members 94 97 retained on the shank by a fixed washer 93. Contact washers 91, 92 occupy spaces 104, 106 between members 95, 96, 97 and a light spring 102 urges washer 90 toward a shoulder 100 on the member 94. A spring 99, stronger than the armature return spring 88, acts between the members 94 and 96. In the de-energized position shown, the washer 90 bridges contacts 35, 36 and the washer 91 bridges contacts 37, 38. In the energized position the washer 91 bridges contacts 59, 73 and the washer 92 bridges contacts 48, 49, the spring 99 being strained so as to augment the restoring force of the spring 88 on de-energization.
Patent GB-1409613-A (GB)
Title: Apparatus for welding together a base part and a cover part of a photographic slide frame
IPC: B29C65/78
Filed: 1973-09-13
Abstract: 1409613 Seaming non-metallic sheet material GEIMUPLAST PETER MUNDT KG 13 Sept 1973 [21 Sept 1972] 43134/73 Heading B5K Apparatus for welding together two plastics parts 5, 6 of a photographic slide frame, consisting of a base 5 hinged by a film to a cover 6, and for aligning the welded frames on carrying and centering rods 31, 32, comprises two feed magazines 1 from which tracks extend to an ultrasonic welding horn 12 and which are open on those sides 3, 4 which are at right angles to the direction of travel of the parts 5, 6, the tracks being designed to bend up the part 6 from a horizontal plane, in which both the parts 5, 6 lie initially, into a vertical plane and guide the part 6 into the part 5 in a succeeding portion ; endless conveyer belts or chains 7 provided with pushers 8, 9, 10, 11 and associated one with each magazine 1 to move the parts 5, 6 towards the horn 12; and two downwardly extending centering magazines 23, 25 which succeed the horn 12 and are provided each with a plunger 28, 27 disposed above the track. As shown in Fig. 1, the parts 5, 6 are supplied to the magazines 1 in an unfolded state with the parts 6 extending outward through the sides 3, 4. After the pushers 8, 9, 10, 11 have moved the parts 5, 6 towards the horn 12, fingers 13, Fig. 2, centre the folded parts beneath the horn. As the parts 5, 6 are fed by the chains 7, the folding of the parts is effected by rails 15, 16, Fig. 3, the rail 15 being provided with a rising cam 19 to fold the part 6 to a vertical position and with a deflecting ledge 22 to guide the part 6 into the part 5. Four centering magazines, e.g. 23, 24, 25, Figs. 2 and 4, are each provided with a plunger 28, 29, 27 carried in pairs by a holder 29a, and movable by a fluid pressure actuator 30. Centering rods 31, 32 are provided. Guides 33, 34, 35 are provided for the welded frames 36, 37, the guides 34, 35 being swingable outwardly so that the plungers 27, 28 can force the frames 36, 37 into the magazines. When the rods adjuacent to the horn 12 are full, changeover means is actuated so that the other two plungers are actuated to fill the other two centering rods. The magazines 1 are provided with a lifting plate 38, Fig. 5, pivotable about a pin 39 and upon which only a few slide frames rest to prevent lower frames in the stacks from becoming canted. The major portion of the stacks are supported by a clamping device 40.
Patent GB-954832-A (GB)
Title: Production of tertiary butyl acetate
Inventor: CROCKER HENRY PETER
IPC: C07C69/14
Filed: 1959-12-19
Abstract: Tertiary butyl acetate is produced by contacting isobutene with a mixture of from 0.5% to 30% by weight of sulphuric acid in acetic acid, neutralizing the sulphuric acid with aqueous alkali, removing hydrocarbon from the product by distillation and distilling the resulting mixture to recover tertiary butyl acetate and unreacted acetic acid. The isobutene may be used in liquid or vapour form, and may contain other hydrocarbons. Suitable procedures for recovery of the tertiary butyl acetate are described.  Some tertiary butanol may be obtained during the separation.
Patent GB-1395386-A (GB)
Title: Laser arrangement for generating a laser beam for machining blanks
IPC: B23K26/06
Filed: 1972-09-19
Abstract: 1395386 Lasers PIERRES HOLDING SA 19 Sept 1972 [23 Sept 1971] 43260/72 Heading H1C A laser suitable for boring close tolerance holes, e.g. in watch jewels, has the radii of curvature of its resonator mirrors and the position of the laser active rod within the resonator chosen to provide a stable fundamental mode output. Two resonator parameters g 1  and g 2  are defined, stable outputs being obtained when 0 < g 1  . g 2  < 1; the parameters are defined by the following equations, and the stability condition is satisfied if, when plotted on a rectangular co-ordinate graph, g 1  and g 2  both lie within a region bounded by the two curves satisfying the following equation In the above equations the variables are the distances a, b and d shown in Fig. 5, the radii of curvature P 1  and p 2  of the two mirrors, the focal length f of the thermal lens formed when the active medium is heated during pumping, the refractive index n of the medium # is defined as 1-(d/nf))<SP>1/2</SP> and L as #(a+b)+ (d/n)-   (ab/f). The preferred value of g 1  . g 2  is ¢, this allowing the maximum fluctuation in the focal length f of the laser rod before the resonator becomes unstable.
Patent GB-1357609-A (GB)
Title: Data transmission
IPC: H04L25/03
Filed: 1971-09-17
Abstract: 1357609 Automatic equalizers INTERNATIONAL BUSINESS MACHINES CORP 17 Sept 1971 [31 Dec 1970] 43346/71 Heading H4R In an automatic equalizer set up by transmission of test signals prior to data transmission, a number of transversal equalizers are connected in series and the multipliers of each equalizer are adjusted so that each equalizer has a transfer function 1 +D, where the input signal to that equalizer is 1-D, -D being the distortion introduced by the channel after partial correction in any preceding equalizer. As shown each equalizer stage 10 comprises a tapped delay line or succession of shift register stages 11 with multipliers 14 connected to the taps or junctions between stages and feeding adders 13, the output from which feeds the input of the succeeding delay line or shift register 11. For setting up, pulses are transmitted over the system, separated by a suitable interval so that their distortion products will not overlap, even after passing through the equalizer which spreads the distortion. Initially each equalizer is set so that its centre tap multiplier is at a factor of 1 while all the remaining multipliers are set to 0. The resulting signal at the equalizer output, which initially just shows the distorted pulse received from the line, i.e. 1-A where -A is the distortion, is fed to difference circuit 17 where the distorted signal is subtracted from a pulse identical with the desired output pulse but of twice the amplitude. The resulting signal, i.e. 1+A, is utilized to adjust the multipliers of the first stage 10, via the tap adjuster 16, to give a transfer function (1+A). On the succeeding pulse the multipliers of the second stage 10 are adjusted, the input being the equalized signal at the output of the first stage, i.e. 1-A<SP>2</SP> and the tap settings 1+A<SP>2</SP>, the second stage requiring twice as many delay or shaft register stages as the first, due to the expansion of the signal 1-A<SP>2</SP> relative 1-A. The process is repeated until all the equalizer stages have been adjusted. During setting up a signal averaging circuit 2 averages a number of signals received from the line to provide a test signal and an automatic gain control circuit 3 normalizes the main pulse of the test signal to unity amplitude
Patent GB-1407340-A (GB)
Title: Semi-automatic welding gun
IPC: B23K9/007
Filed: 1973-09-15
Abstract: 1407340 Welding by fusion E BUCHEL 15 Sept 1973 43399/73 Heading B3R In an are spot welding gun having linear ratchet means which advances a coated consumable electrode 90 each time a weld is made and is responsive to relative axial movement between a gun body 51 and a workpieceengaging hollow head 59 into which the electrode protrudes, the head comprises inner and outer sleeves 60, 62 of metal, preferably copper, and an intermediate sleeve 61 of thermally insulating material, e.g. of asbestos. The outer sleeve 62 may have cooling fins 63. All three sleeves are forwardly coned and, Fig. 5 (not shown), the outer sleeve may be further coned at its forward end for welding in tight corners. At the rear of the head is positioned a disc 65 of electrically insulating heat resistant material, e.g. asbestos, apertured for passage of the electrode. The gun comprises an aluminium alloy body 51 with a synthetic resin moulded pistol grip 52. The head 59 is threaded into a sleeve 53 which is axially slidable, on pins 54, within the open end of the body, against springs 55. For further cooling of the head, slots 57, 58 are provided in the gun body and the sleeve 53. A lower ratchet bar 77 is fast with the gun body, and an upper ratchet bar 69 is at one end fast with the sleeve 53 and at its other end slotted at 71 for sliding guidance with respect to the body. An electrode carrier 87 is slidable within a metal, e.g. brass, tube 84 supported on the body by two electrically insulating rings 85, 86, e.g. of P.T.F.E. The carrier is fast with a synthetic resin moulded slider 79 having spring-loaded pawls (80, 81) respectively engageable with the ratchet bars 69, 77. On forward movement of the gun body, when the head engages the workpiece and is pushed back into the body against the springs 55, the electrode is taken along with the body by operative engagement of the lower bar and its pawl, and on withdrawal of the body, when the springs 55 push the head outwardly of the body, the electrode is fed forwardly of the body in readiness for the next weld, by operative engagement of the upper bar and its pawl. Relative axial movement between the head and the body, providing electrode advance equal to one or more ratchet tooth pitches, is determined by the setting of a screw-secured stop 73 adjustable along the bar 69 and engageable with the bcdy. The electrode carrier includes a spring-loaded electrode-stub-ejecting pin (95, Fig. 2, not shown) which is released by manual raising of a latch plate vertically slidably mounted on the slider 79. A spring 88 provides electrical contact between the tube 84 and the carrier 87. A trigger 100 controls a microswitch 101 connecting, via a relay, welding current to the tube 84, and may also control a valve admitting cooling compressed air to a connection (not shown) to one or more of the slots 57, 58.
Patent GB-1047180-A (GB)
Title: Improvements in or relating to windows and window frames
IPC: E06B3/44
Filed: 1963-11-04
Abstract: 1,047,180. Window frames. W. A. REDDINGTON and C. F. CONWAY. Feb. 5, 1965 [Nov. 4, 1963], No. 43428/63. Heading E1J. The metal frame of a vertically sliding window is formed in two part frames 10, 11 secured by cruciform-section separator strips 12, 13 of thermally insulating material having two limbs of dovetail shape which fit in correspondingly shaped grooves in the frame parts. The parts 10, 11 are separated by rectangular arms of the strips 12, 13 and by a thermally insulating material 20 and air space such as between strips 12, 13.. Sashless panes 23, 24 are carried in carriers 21, 22 each formed from an extension having a groove for receiving the pane and a portion of rectangular crosssection 37 which slidably fits behind abutments 10d, 11d within the channel of frame parts 10, 11. The carriers are formed from synthetic resinous material reinforced with metal cores 21a, 22a to which is connected the ends of a spring 32 of a balancing device (not shown) accommodated in the housings 18, 19. The gaps between the frame parts and the carriers are closed by strips 25 of polypropylene pile surface secured in recesses 10e in the frame parts. The glass panes are held against vertical movement relative to the carriers by plates 36 and packing strips 37 fixed to the carrier metal cores. The carriers do not project beyond the frame members. The space between the two panes may be closed by a transparent block 28 carried on the pane 24 and having sealing strips between it and the pane 23.
Patent GB-1187571-A (GB)
Title: Improvements relating to Root Crop Harvesting Machines
IPC: A01D17/14
Filed: 1968-05-01
Abstract: 1,187,571. Root crop harvesting machine. F. A. STANDEN & SONS Ltd. and P. STANDEN. 30 April, 1969 [1 May, 1968; 12 Sept., 1968], Nos. 20741/68 and 43478/68. Heading A1F. A root crop harvesting machine comprises lifting elements adapted to lift crop from the ground to a rotating cage of openwork construction that effects primary screening and is characterized by the provision of secondary screening means including a riddle conveyer and a belt conveyer divided longitudinally into at least two sections. In an embodiment (Fig 2) the crop is lifted and carried to a rotating cage 2 from whence it is deposited on a riddle conveyer 4. The conveyer 4 comprises spaced apart bars 11 spanning a pair of cables. The bars 11 are adjustably clamped to the cables so that the separation of the bars may be varied. Small sized crop and debris pass through the riddle conveyer and are deposited by means of a guide 7 on the marginal areas of the belt conveyer 5. Large sized crop is retained on the conveyer and passes down a shoot 13 to the central area of the belt 5. The sorting is completed manually. In a further embodiment (Fig. 5) the riddle conveyer comprises spaced apart bars of oval cross-section spanning a pair of chairs which are moved transversely to the conveyer 5. The separation of the bars is varied by rotating the bars about their longitudinal axis. Alternate bars are pivoted to the other alternate bars so as to swing downwardly out of the general plane of the lower run of the riddle conveyer. Small sized crop and debris pass through the riddle conveyer and large sized crop is retained and passed to a conveyer 27 which runs in a direction 28 opposite to the direction of motion of the crop. The large potatoes however fall on to the belt conveyer 5 and any remaining debris is deposited from the conveyer 27 with the small sized crop and debris. The inclination of conveyer 27 is adjustable. The large sized crop section of the conveyer 5 is terminated by a crop outlet comprising a conveyer which delivers the crop to a tank or to another vehicle. The small sized crop section terminates in a debris discharge which may comprise a hammer mill to pulverise rejected material.
Patent GB-1142704-A (GB)
Title: Olefin co-dimerization and catalysts therefor
IPC: C07C2/24
Filed: 1966-09-30
Abstract: 1,142,704. Co-dimerizing olefins. GOODYEAR TIRE & RUBBER CO. 30 Sept., 1966 [20 Oct., 1965], No. 43742/66. Heading C5E. [Also in Division B1] Propylene, butene-1, butene-2, isobutene, pentene. 1, iso-pentene and pentene-2 are codimerized with each other or with ethylene in the presence of a catalyst consisting of 1-30% of potassium on a support consisting of microspheroidal alumina, which may or may not contain 5-40% of K 2 CO 3 , KCl, KBr, KI or K 2 SiO 3 , the support having a surface area of 100-300 m.2/gm. and a bulk density of 0À7- 1.0 gm./c.c. Examples describe (1) co-dimerization of butene-2 and ethylene to yield 3-methyl pentenes-1 and -2, n-hexene and (2) dimerization of propylene to yield 2-methyl-2 pentene and 4-methyl-2 pentene.
Patent GB-1495251-A (GB)
Title: Flame resist textile
IPC: D02G3/44
Filed: 1974-12-12
Abstract: 1495251 Flame resisting composite yarns IWS NOMINEE CO Ltd 12 Dec 1974 [19 Sept 1973] 43987/73 Headings D1F and D1W A composite yarn comprises a central strand of continuous inorganic filaments surrounded by a structure of organic tactile fibres bearing a flame-resist composition. The yarn may be formed by feeding glass filaments into the front drafting rollers of a spinning frame while a wool roving is drafted. The twisted yarn may comprise at least one strand of glass filaments twisted with at least one strand of the organic fibres. The yarn may be doubled with a further yarn, e.g. a wool yarn, in the opposite twist direction. The yarns may be formed, e.g. by weaving, into a flame-resistant fabric. The organic fibres preferably comprise wool, although up to 20% of other fibres may be present. The flame-resist composition may comprise inorganic salts, boric acid - boric mixtures, mono-ammonium phosphate and precipitated compositions of tin, titanium or zirconium, flame-resist treatments based on phosphoric acids, or using tetrakis - (hydroxymethyl) phosphonium chloride may be used.
Patent GB-1455058-A (GB)
Title: Apparatus for open-end spinning
IPC: D01H4/10
Filed: 1974-10-10
Abstract: 1455058 Open end spinning, cleaning machines ZINSER TEXTILMASCHINEN GmbH 10 Oct 1974 [11 Oct 1973] 43991/74 Headings D1D and D1F An open end spinning machine comprises a chamber 10 containing a rotor 1 with sloping conical surface 20, a fibre collecting groove 14 formed at the intersection of surface 20 and a concave (base surface 16 extending between the rotor axis X and groove 16, and a stationary plate 2 having an exterior surface within rotor 1 and cleaning duct 6 for 'blowing dirt and fibres from the groove 14, the point of greatest depth of the surface 16 below the plane Y may be ¢ to ¥ of the distance from axis X to groove 14. The concave base surface 16 assists cleaning of the rotor.
Patent GB-963488-A (GB)
Title: Apparatus for continuous analysis of solutions and gases
IPC: G01N21/21
Filed: 1960-12-22
Abstract: 963,488. Photo-electric measurement of transmissivity. HAGAN CONTROLS Ltd. Dec. 22, 1960 [Dec. 23, 1959], No.44048/60. Heading G1A. Apparatus for measuring the transmissivity of a fluid comprises a lamp shining through a sample on to a first photosensitive device and through polarisers on to a second photosensitive device and means responsive to the outputs of said devices to adjust the polarisers relatively to equalise the outputs. Boiler water is tested for phosphate (PO4) by passing it through a chamber 19 and adding a reagent which colours the water blue to a shade dependent upon the PO4 content at a rate proportional to the rate of flow. Light from a lamp 26 passes through chamber 19 to a photomultiplier PC2 and through polarisers 31, 30 to a photomultiplier PC1. The outputs of photomultipliers PC1 and PC2 are applied to the grids of triodes 40, 41 and any difference between the voltages E1 and E2 is made alternating by a vibrator 60 and energizes a motor 33 which adjusts the angle of polariser 31. The PO4 concentration is indicated on a meter 72 energized from a potentiometer 71 coupled to motor 31. Motor 31 may control the PO4 feed.
Patent GB-1105898-A (GB)
Title: Improved purifier for separating particles from a fluid
IPC: B04B3/00
Filed: 1966-10-03
Abstract: 1,105,898. Centrifugal strainer / separator. MICHIGAN DYNAMICS Inc. 3 Oct., 1966 [23 Oct., 1965], No. 44124/66. Headings B1D and B2P. A centrifugal strainer comprises a solid bowl centrifuge stage having a sediment trap 58 behind a louvred screen 57, an inward flow filtering screen 62 of frusto-conical shape and a by-pass valve 70 .. 77, which is operated by excess pressure to by-pass the screen 62. The housing is in two parts 12, 13, clamped together at 14, part 13 being mounted on a motor which drives shaft 22 and the assembly 27. Fluid is pumped by an external pump through inlet 24 and flows along passage 53, which may have additional impeller blades therein, radial passages 56 into annular cavity 33, in which heavy solids are separated out and enter annular trap 58, and passes inwards through screen 62 to openings 57' and thence to outlet 25. By-pass apertures 71 open from passages 56 into 'the space enclosed by shell 45, communicating with outlets 57', and are closed by a spring loaded annular gasket plate 73 which moves axially when pressure across screen 62 builds up. The apparatus is dismantled for cleaning.
Patent GB-1486945-A (GB)
Title: Electric resistance devices
IPC: H01C7/02
Filed: 1974-10-11
Abstract: 1486945 Barium titanate ceramic composition MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 11 Oct 1974 44135/74 Headings ClA and ClJ [Also in Division H1] A composition for making a ceramic PTC thermistor (by compressing into a shaped body and firing at 1240 to 1400 C. to form a sintered body) comprises as major component a barium titanate in which the Ba may be replaced by up to 40 atomic per cent Sr, up to 30 atomic per cent Pb, or by a mixture of 1-30 atomic per cent of Sr and 1-20 atomic per cent Pb or the Ti may be replaced by up to 30 atomic per cent Sn or the Ba is replaced by 1-20 atomic per cent Pb and the Ti is replaced by 1-30 atomic per cent Su; and as additives (by weight) (a) 0À05-1À24% SiO 2 ; (b) 0À05-0À22% of Nb 2 O 5  or Y 2 O 3 ; (c) 0À005-0À09% of lithium oxide or a compound which forms lithium oxide on air firing; (d) 0À003-0À04% of MnO 2  or a compound which forms it on firing; (e) 0 to less than 1À3% TiO 2 ; (f) 0 to less than 1À26 Al 2 O 3 ; and (g) 0 to less than 0À12% of Sb2O 3  and Bi 2 O 3 . The composition may be formed by heating BaCO 3 , TiO 2  and either Nb 2 O 3  or Y 2 O 3  to 900-1250% C. and then mixing in the additives.