baber/WOPTO huggingface dataset:
Patent GB-1252740-A (GB)
IPC: H04K1/00
Filed: 1968-02-09
Abstract: 1,252,740. Secret transmission. PLESSEY CO. Ltd. 7 Feb., 1969 [9 Feb., 1968], No. 6612/68. Heading H4R. In a speech secrecy system the speech signal is differentiated and fed to a phase splitter 3 the two outputs, 4 and 5, of which are selected alternately for connection, via a filter 8, for transmission. The selection is controlled by a digital code generator, 7, comprising a shift register with two stage coupled, via an "exclusive or" gate, to the register input. At the receiver the incoming signals are fed to a phase splitter with its outputs selected by a switch controlled by a similar digital code generator to that used at the transmitter, the selected signals being integrated before reproduction. In order to remove the syllabic rhythm of the speech a speech detector may be employed to switch a constant frequency bias tone to the coder input during inter word gaps in the speech. At the receiver a similar speech detector may be employed to remove the bias tone from the decoded speech, or a notch filter tuned to the bias tone may be used. Distortion at the receiver due to the band limiting characteristic of the transmission channel on the switched signal can be reduced by the circuit shown in Fig. 5 in which the incoming signal is sampled at a point immediately before the switching takes place, using an appropriate shift register tapping and delay 28. The sample is then gated to a pulse forming network 32 and added to the incoming signal applied to the phase splitter.
Patent GB-1256627-A (GB)
IPC: H01H50/26
Filed: 1969-01-31
Abstract: 1,256,627. Electromagnetic relay armature mounting. PLESSEY CO. Ltd. 4 Dec., 1969 [31 Jan., 1969], No. 5391/69. Heading H1N. The L-shaped armature 7 of a relay which may be a post-office relay has a portion 10 shaped so that the armature fits over a wedgeshaped projection 5 projecting from the end of the surface 2 of a magnetic yoke 1 and the armature is provided with a cut-out 12 at the joint of the link 7 thereof with the portion 10 and the armature is retained by a single strip 13 of resilient material which is supported by the yoke 1 and enters the armature cut-out 12.. During assembly of the relay the strip 13 is inserted under a fixed comb 3 until notches 18 engage shoulders 19 of the comb to engage a locating stud (not shown) with its recessed end 14. The link 9 of the armature is bificated to pass on either side of the fixed comb 3 which engages the free ends of two sets of fixed contact springs on either side thereof. Alternatively the end of the strip 13 may be bificated to retain two separate armatures (Fig. 2, not shown) or engage in separate cut-outs in a single armature. The cut-out or cut-outs may (as shown) be such that the strip 13 engages the knife-edge 6 or may extend only part way through the armature thickness. The end 15 of the strip 14 may be bent downward.
Patent GB-1258937-A (GB)
IPC: H02G1/12
Filed: 1969-06-03
Abstract: 1,258,937. Wire strippers. C. P. ADAMSON. 3 June, 1970 [3 June, 1969], No. 28104/69. Heading H2C. An electrically heated wire stripper comprises two tubes 11 with handles 10 and heads 12 which contain heating elements. When closed, against spring 13, blades 14 which have notches abut, U-shaped member 17 keeping the notches aligned. Collar 16 is movable and by placing the end of the wire against the plate 17 the length to be stripped may be gauged. The blades 14 are interchangable.
Patent GB-1264455-A (GB)
IPC: G21C7/12
Filed: 1970-06-18
Abstract: 1,264,455. Controlling reactors. SIEMENS A.G. 18 June, 1970 [19 June, 1969], No. 29729/70. Heading G6C. In a rapid shutdown coupling device, a coupling member 1 has at its upper end an armature plate 11 which in normal operation is held against an electromagnet 8 so compressing a spring 9 and at its lower end is connected by means of locking balls 4 to a drive rod 3 from which a neutron-absorbing control rod 5 is suspended. The coupling member 1 is housed within a guide tube 7 connected at its upper end to a drive mechanism 10 which serves to drive the absorber rod 5 into or out of the reactor core 6. On interruption of the holding current, the spring 9 expands downwardly accelerating the descending coupling member 1 and with it the control rod assembly 3, 5. After a short downward movement, the locking balls 4 are displaced into a recess 72 in the guide tube 7 and the control rod assembly 3, 5 is released. For withdrawing the control rod 5 from the core 6, the guide tube 7 is lowered until the drive rod 3 can return into the coupling member 1 which is then pushed upwards in the guide tube 7 until the armature plate 11 bears against the holding magnet 8. As a result of the bevel of the recess 72 in the guide tube 7 the locking balls 4 again engage within a recess 31 in the drive rod 3, and the member 1 and the rod 3 are locked together once more. After the holding current has been switched on, the control rod 5 can be retracted from the core 6 by the drive mechanism 10.
Patent GB-1264632-A (GB)
IPC: E21C35/187
Filed: 1969-07-08
Abstract: 1,264,632. Mining. ATLAS COPCO MCT A.B. 8 July, 1969 [16 July, 1968], No. 34253/ 69. Heading E1F. A tunnel driving or mining excavation machine having rotary cutters 1 provided with detachable cutting teeth 2 at the periphery includes atomizing nozzles 4 supplied with compressed air and a liquid and having outlet ducts 5 directed between the teeth 2 and the tunnel face 8 to cool the teeth. There is a npzzle between each pair of adjacent teeth with two outlet ducts, one for each tooth. Each nozzle is supplied with air from a pipe 28 via an annular space 49 between slip rings 42 and 43 and via a pipe 50, and with water via an annular space 46 between the slip rings 41 and 42 and a pipe (47) parallel to the pipe 50. If the teeth 2 only contact the face 8 during part of the rotation of the cutter then the space 46 is only connected to the pipes (47) during that part. Liquid enters each nozzle 4 through apertures 61. There may be four cutters 1 on a rotatable drum head 17.
Patent GB-1265322-A (GB)
IPC: G03G5/00
Filed: 1968-04-24
Abstract: 1,265,322. Photoconductive recording element. AGFA GEVAERT. 24 April, 1969 [24 April, 1968; 12 Nov., 1968 (3)], No. 19457/68. Heading H1K. [Also in Division G2] A recording element comprises at least one water permeable recording layer, the waterpermeability of which can be reduced by exposure to electromagnetic radiation without rise in temperature, the layer comprising photoconductive particles and hydrophobic particles dispersed in a continuous hydrophilic binder phase. On exposure to radiation, the change in conductivity in the image areas produces coagulation of the dispersed particles and in consequence reduces the water-permeability of those areas. The areas of different permeability may be used in various ways to give a visible copy or a printing master: (a) dye or a colour catalyst may be diffused into the permeable areas to give either positive or negative images, (b) an etchant may be used on the recording layer or a support beneath to give a planographic or intaglio printing master, (c) dye or colour catalyst may diffuse imagewise from the element to a receiving sheet, (d) the permeable parts may be washed away to give a direct visible copy or a gravure master, (e) a stencil or screen-printing master may be made by coating one or both sides of a screen material, e.g. Japan paper, nylon fabric or woven bronze wire, with the recording layer and after imagewise exposure washing away the permeable areas of the layer, (f) the permeable portions of the image may be transferred to a hydrophilic and/or porous surface, e.g. a paper by squeezing the exposed element against the surface, (g) the converse of process (f) is possible and yields a hectographic master if the transferred materials contains appropriate dyes. In the specific embodiments, a support is provided of polyethylene terephthalate which may be coated with a mixture of urea-formaldehyde resin and silica, paper coated with polythene or cellulose triacetate. The support is coated with at least one subbing layer comprising an aqueous alcoholic solution of copoly vinylidene chloride N - t - butyl acrylamideitaconic acid or copoly butadiene-methyl methacrylate and polyethylene particles together with silica, gelatine, saponin, polyethylene glycol or the sodium salt of the condensation product of oleic acid and methyl taurine. Formaldehyde may be added to assist hardening of the polymeric layer. The photo-conductive particles may be ZnO or PbO + Bi whilst the hydrophobic particles are a dispersion of polyethylene or polymethyl methacrylate. Gelatine or polyvinyl pyrolidone are used as the hydrophilic phase. Additives to the recording layer are colloidal Ag or C, dye mixtures, Na hexametaphosphate, dibutylphthalate, paraffin oil, carnauba wax, isonoylphenyl decaethoxanol or n-hexadecyloxydecaoxethylene. Many other supports, photo-conductors, hydrophobic particles and hydrophilic binders are specified.
Patent GB-1265501-A (GB)
IPC: G03F3/10
Filed: 1969-03-17
Abstract: 1,265,501. Photo-sensitive stripping films for colour proofing. MINNESOTA MINING & MFG. CO. March 17, 1969 [March 18, 1968], No.13981/69. Heading G2C. A photo-sensitive stripping film for use in colour proofing comprises a support releasably attached to a pigmented hydrophobic polymer layer softenable in an organic liquid, which layer either contains a diazo resin or is overcoated with a layer of diazo resin, the diazo resin being soluble in the organic liquid, and a water-insoluble transparent colourless polymeric barrier layer being coated over the layer containing the diazo resin. The barrier layer may have a pressure-sensitive adhesive and a protective layer on its outer surface. The carrier sheet for releasable attachment either has a smooth surface or a stripping layer which may be polyvinyl alcohol. The pigmented layer may contain polyvinyl butyral as the polymer and the polymer of the barrier layer may be a polyacrylate and a vinyl chloride/vinyl acetate copolymer. To produce a colour proof, the protective layer is removed and the film adhered to a sheet. The support of the stripping film is removed and the film is image-wise exposed and developed to remove the unexposed areas of diazo resin layer and corresponding areas of the barrier layer and pigmented layer. The process is repeated using a different coloured pigment to build up a 3- or 4- colour proof preferably in the following order, cyan, yellow, magenta and, optionally, black. The pigmented layer may contain an opacifier such as titanium dioxide.
Patent GB-1265556-A (GB)
IPC: B66B15/06
Filed: 1969-06-25
Abstract: 1,265,556. Winding apparatus. ALLMANNA SVENSKA ELEKTRISKA A.B. 25 June, 1969 [27 June, 1968], No. 32041/69. Heading B8B. [Also in Division F2] A mine hoist comprises two drums 3-4 for winding a pair of skip cables in opposite directions, the drum 4 being fixed to a driving shaft 5 whereas the drum 3 is rotatably mounted thereon and connectible thereto through friction clutch units 22 which are manually engageable by spring forces and are disengageable by hydraulic piston and cylinder assemblies. The units 22 are mounted on a hub disc 20 secured to the shaft 5, and act to engage or release frictional contact between a pair of friction discs resiliently secured to the interior of the drum 3 and a friction disc secured to the hub 20 and positioned between the said pair of discs. When the angular relation between the drums 3, 4 is to be changed to facilitate skip operation between a different pair of levels, the drum 3 is braked by a unit 9 and the clutch units 22 are disengaged, after which a brake unit 10 on the drum 4 is disengaged so that the drum 4 may be rotated relative to the drum 3, the brake 10 and clutch 22 being re-engaged thereafter. The hoist may be provided with interlock devices which prevent the brake unit 9 and the clutch units 22 from being released simultaneously.
Patent GB-1288751-A (GB)
IPC: B21D28/20
Filed: 1968-06-20
Abstract: 1288751 Punching; die sets COLEYROTOLIN Ltd 22 Sept 1969 [20 June 1968] 29374/68 Heading B3W Apparatus for actuating a die set, comprising a punch-plate 45 and a base-plate 14 held in alignment by pins 51 and bearings 52, comprises a base 12, a support 11 projecting upwardly from the base, a toggle linkage 34, 41 pivoted to the support 11 at 38 and screwed 16, an attachment block 43 for the punch-plate 45 and means for operating the toggle linkage such as a fluid-operated double-acting ram 31 and lever 32. The die set-actuating apparatus thus has no means for guiding the path of the attachment block 43, when the toggle linkage is operated to move the punch-plate towards or away from the base-plate, the path being determined solely by the pins 51 and bearings 52 of the die set. The support 11 and base 12 are formed by parallel, somewhat L-shaped plates 10 each carrying a lug 16 for location in a complementary groove in the base-plate. Bolts 18 pivoted to the base 12 are swung up and secured by nuts 24 in lugs 22 on the base-plate 14 to clamp the base-plate 14 in position. The attachment block 43 is pivoted to lugs 46 on the punch-plate and the link 41 is adjustable in length. Levers 34 and 32 form a bell crank 33. The apparatus may be mounted on a bench 53 by means of 54, 55 or have a base to form a free standing press.
Patent GB-1288929-A (GB)
IPC: B23K35/30
Filed: 1969-11-25
Abstract: 1288929 Welding steel BOFORS A B 25 Nov 1969 [2 Dec 1968] 57693/69 Heading C7A In a method of welding hardenable, corrosion resisting steel (e.g. as described and claimed in Specification 948964), the filler metal is provided by a material comprising:- C 0À01-0À1% Cr 11-14% Mn 0À25-2% Ni 3-8% Mo 0-3À5% and one or more of Nb, Ta, Ti and V in such an amount that the atomic ratio of these carbide formers to carbon in the weld metal formed is not greater than 1, the balance, apart from impurities and incidental elements (e.g. S, P and Si) being Fe. The welding may be effected by the M1G or T1G processes.
Patent GB-1290662-A (GB)
Filed: 1968-09-25
Abstract: 1290662 Fluoropyridazines IMPERIAL SMELTING CORP (NSC) Ltd 16 Sept 1969 [25 Sept 1968] 45573/68 Heading C2C Various fluoropyridazines of formula wherein each Y is hydrogen, fluorine, C 1-6  alkyl or C 1-6  alkoxy, at least one Y being fluorine and, in the case of the first formula, at least one Y being alkoxy, and E is hydrogen or C 1-6  alkyl, are prepared by (a) replacement of a fluorine atom by a methoxy group in the 3- and/or 6- position by reaction with an alkanol under strongly acidic conditions, or in the 4- and/or 5- position by reaction with an alkoxide, (b) conversion of a fluorine atom in the 6-position to a keto group by reaction with aqueous acid, (c) reaction of a 6-fluoropyridazine with a trialkoxy-tetrafluoroborate and treating the pyridazinium salt obtained with water, or (d) reaction of a 1-H-pyridaz-6-one with a diazoalkane to produce a 6-alkoxy-pyridazine and/or a 1-alkyl-pyridaz-6-one. The products have fungicidal, bactericidal and pesticidal activity. Tetrafluoropyridazine is prepared by reaction of tetrachloropyridazine and potassium fluoride. Reference has been directed by the Comptroller to Specification 1,163,582.
Patent GB-1295188-A (GB)
IPC: B26B25/00
Filed: 1970-12-23
Abstract: 1295188 Cutting apparatus A FISHMAN 23 Dec 1970 [29 Dec 1969 22 July 1970] 61119/70 Heading B4B Apparatus for cutting sheet material, e.g. paper, comprises a pair of cutting wheels 20, Fig. 3, having cutting edges 21 and mounted on shafts 26 to be freely rotatable and axially non- displaceable within a housing 10 which includes a pair of guide slots 24, 28 one of which 24 diverges away from the cutting wheels, and the other of which is straight. Centring members 22 include flaps 32, to centre material inserted at 34, and further include markings 36, Fig. 5, to permit cutting along a predetermined line. In operation a sheet of paper is fed into the apparatus, which is hand held, passes through the slot 28, rotates the wheels, and one of the cut-off pieces passes out through the diverging slot 24. The cutting wheels may be mounted on angled but coplanar axes, and the base (28a), Fig. 6 (not shown), of the groove 28 may be used as a guide surface to assist in cutting uniform strips.. A measuring rule and marker square arrangement may be attached to the housing 10 cutting strips of predetermined width, Fig. 8 (not shown).
Patent GB-1311847-A (GB)
Title: Fibre bearings
IPC: B29C70/78
Filed: 1969-04-09
Abstract: 1311847 Moulding bearings VANDERVELL PRODUCTS Ltd 8 April 1970 [9 April 1969] 18185/69 Heading B5A [Also in Division F2] A bearing has rigid backing member 11, Fig. 1, having a layer 10 of bearing material thereon, the layer 10 comprising a mixture of fibres and polymeric or polymerizable material. In a method of making the bearing, the backing member 11 is positioned in a mould 12 of a press (not shown) and is retained by means of a disc 13. A quantity of the mixture, sufficient to form the layer 10 when a punch 14 is pressed into the mould, is placed into the mould. Heat is then applied to the layer in order to cure it. In another embodiment, a half-bearing having a backing member 21, Fig. 2 (not shown) has a layer formed thereon. In a further embodiment a backing member 31, Fig. 3, is positioned in a mould 32 and is retained by means of a disc 30 and by means of a sleeve 35. A punch 34 is located within the mould and is slidablymounted in the sleeve 35. The material is injected into the mould cavity through a hole in the disc 30 and, after the material has hardened, the bearing is ejected from the mould by means of the sleeve 35, the disc 30 having been previously removed from the mould. The fibres may be carbon, asbestos, glass, P.T.F.E. or metal, may have a length of 0À003 to 0À120 inch may be sized prior to mixing with the polymeric or polymerizable material and may be sized with with a solution of the polymeric of polymerizable material. The latter may be provided with a hardener or curing agent, may be a thermosetting or thermoplastics material, may be an epoxy resin, a phenolic resin, a polyamide or a polyimide resin. The fibres may be mixed with the polymeric or polymerizable material prior to entering the mould, may be placed in the mould before the polymeric or polymerizable material, may be applied to the punch, the polymeric or polymerizable material having been previously inserted in the mould, may be magnetically responsive and maintained in position during moulding by a magnetic field, may be rendered magnetically responsive by coating with iron oxide, Fe 3 O 4 , may be held in position during moulding by an electrostatic field, and may be held normal to the bearing surface.
Patent GB-1323925-A (GB)
Title: Manufacture of fibre-reinforced articles
IPC: B28B21/48
Filed: 1970-10-09
Abstract: 1323925 Fibrous tubes F L SMIDTH & CO AS 9 Oct 1970 48148/70 Heading F2P A tube is formed by winding a film formed in a slurry reservoir of fibrous material and a binder, the film being compressed to remove liquid therefrom and then protected from penetration of air by the slurry reservoir. The film is formed in a winding mandrel 32 which, along with a screen cylinder 29 and a compression roller 28 on either side, bounds the slurry reservoir 33; the film is compressed between the mandrel and the roller and is then immediately exposed to the slurry, whereby another layer is formed to build up the tube wall. The mandrel 32 is driven by a felt belt 17 which also supports the film. The screen cylinder 29 has a vacuum bore 30 to aid water removal. As shown the vacuum bore 30 extends past the slurry reservoir 33 and to avoid air penetration to the cylinder .29 above the slurry reservoir, an air-impermeable band 27 of plastics foil covers the belt 17. Alternatively the vacuum bore is located inside the cylinder 29 only aligned with the slurry reservoir 33. The belt tension and mandrel/roller compression force are adjusted by hydraulic rams 20, 23 acting on beams 18, 21. A discharge valve 35 measures the quantity of slurry to the reservoir 33 so that the reservoir runs dry when the desired wall thickness of tube has been attained. The slurry is a liquid suspension of fibrous material with one or more binders, the material being asbestos-cement, plastics or glass. The tube may subsequently be cut along its generatrix to form a sheet of material.
Patent GB-1327040-A (GB)
Title: Gear change switch
IPC: G05G9/047
Filed: 1970-11-23
Abstract: 1327040 Change-speed control; electric switches C A V Ltd 23 Nov 1970 [10 Dec 1969] 60186/69 Heading F2D [Also in Division H1] A motor-vehicle ball-mounted gear shift lever 21 is movable in a gate from a central neutral position to any one of a number of micro-switch 28 operating positions for controlling five forward ratios and one reverse ratio, an auxiliary position, and to a further micro-switch 28 operating position for controlling the operation of the doors of the vehicle. The ball-end 18 of the gear lever 21 is seated in a sperical shell-like bearing member 16 which is mounted for rocking movement by means of pins 22 integral therewith, a stop tab 29 integral with the bearing member 16 being moved to block the centre neutral slot during movement of the gear shift lever 21 into fifth gear (Fig. 1) whereby downshift movement of the gear lever 21 from fifth gear can only be into the fourth gear position, such movement serving to pivot the bearing member 16 about its pivot pins 22 to retract the stop tab 29 to thereby allow further unlimited movement of the shift lever for selection of the lower gear ratios, &c., movement of the shift lever into first ratio, the door operating position, reverse and the auxiliary position being possible only after manually raising a spring loaded gear lever knob 36 to lift a latch sleeve 30 first clear of steps 33, 34 for first ratio and the door operating position, and then further lifted clear of steps 35, 37 for reverse and the auxiliary position repsectively, the steps being formed at the edges of the gate housing 14. A spring loaded detent ball 20 in a spigot 19 of the ball-ended shift lever 21 engages detent grooves 24 and 23, 25, corresponding to the neutral and gear-establishing positions, &c. of the shift lever 21, and further, spring urges the ball-end 18 into maintaining engagement with the bearing shell 16.
Patent GB-1329333-A (GB)
Title: Flow control valves
IPC: F16K7/08
Filed: 1971-05-26
Abstract: 1329333 Valves MUCON ENG CO Ltd 18 May 1972 [26 May 1971] 17358/71 Heading F2V In a valve having a fixed ring 1 and a rotatable ring (2) an operating handle 6 is fixed to the rotatable ring and pivotally carries an integral plastics trigger 10 and pawl 9. The trigger 10 resiliently bears on the handle 6 to bias the pawl 9 into engagement with one of a series of detents 17 on the fixed ring. The pawl 9 has an integral pivot pin (11) which together with its head 12 is split so that the head may be snap-fitted into the radial arm 8 of the handle. The particular valve described is a flexible open ended tube folded back on itself with the two ends connected respectively to the two rings.