baber/WOPTO huggingface dataset:
Patent GB-1236475-A (GB)
Title: Variable rate angular drive mechanism
IPC: F16H35/16
Filed: 1968-10-29
Abstract: 1,236,475. Linkwork. PERKIN-ELMER CORP. 29 Oct., 1968 [30 Oct., 1967], No. 51287/68. Heading F2K. A drive for rotatably moving an optical reflecting diffraction grating 68 on the monochromator frame 10 of a spectrophotometer at two different but mathematically related angular rates comprises a compound lever system including a scanning arm 66, on which the grating 68 is secured, rotatably biased anticlockwise by a spring 76 and having an inclined slot 82 engaged by a pin 56 of a slide 35 connected at 38, 40 to a rod 16 axially movable at constant speed by a motor driven friction roller 28, the arm 66 being pivoted at 64 on a second arm 62 itself pivoted on a main pivot pin 60 with which the arm 66 has a lost motion connection 70, movement of the rod 16 to the left initially allowing the arm 66, under the spring bias 76, to turn anticlockwise, relative the second initially stationary arm 62, about the pivot 64 at a first, relatively fast, angular rate until the lost motion connection hole 70 is absorbed (Fig. 3, not shown) after which both arms 66 and 62 of the compound lever turn about the main pivot 60 at a second, relatively slow, angular rate, the initial pivot pin 64 moving upwards out of the path of the driving pin 56 (Fig. 4, not shown). As shown the straight edged slot 82 of the arm 66 enables the arm to turn about the respective pivots 64, 60 according to first and second cosecant functions of the movement of the driving member 16 which is moved at a constant linear rate in a straight line path. Alternatively, by modifying the geometry of the main driving elements and the shape of the scanning arm slot 82, the arm 66 can be moved according to a trigonometric function other than a cosecant.
Patent GB-1081823-A (GB)
Title: Improvement relating to the production of organotin compounds
Inventor: COATES HAROLD
IPC: B01J31/26
Filed: 1963-12-31
Abstract: A process for the production of organotin halides which comprises reacting metallic tin or an alloy thereof with an aliphatic chloride, bromide or iodide in the presence of a catalyst containing a divalent sulphur or selenium atom.  The organotin halide may subsequently be hydrolyzed to yield organotin oxides or organostannoic acids.  The catalyst used is an alkyl mercaptan having less than 20 carbon atoms or a metal mercaptide thereof, a dialkyl sulphide wherein each alkyl group has less than 20 carbon atoms, a thiocarboxylic acid or an ester or a salt thereof, a thiophosphite ester or an inorganic sulphur compound e.g. phosphorus pentasulphide, sulphur monochloride and even elemental sulphur which contains interlinked divalent sulphur atoms.  The action of the catalyst is assisted by a co-catalyst comprising metallic Mg, Zn, Cd, Hg, Cu, Co, Ni, Al, Ti, Mn, Fe, Ca, Cr or a salt, alkoxide or mercaptide thereof.  The metal co-catalysts may be alloyed with the said tin.  Also as co-catalyst there may be used bromine, iodine, interhalogen compounds, compounds which liberate iodine at the reaction temperature or, when not present as a reactant, an alkyl iodide. A solvent which is an aliphatic or cyclic ether may be employed. The reaction is performed at 100 DEG  to 200 DEG  C.
Patent GB-1533237-A (GB)
Title: Film or skin tensioning
IPC: B29D7/00
Filed: 1975-11-26
Abstract: 1533237 Film tensioning STRATHEARN AUDIO Ltd 26 Nov 1975 [27 Nov 1974] 51445/74 Heading B5B A film of thermoplastics material, preferably a crystalline film not susceptible to shrinking under heat treatment, e.g. polyester is stretched beyond its elastic deformation limit, the edges of an area of the stretched film held against relative movement, e.g. by gluing to a frame so that the area is in a smooth condition and heating the material so as to cause it to shrink and become wrinkle free.
Patent GB-1171138-A (GB)
Title: Improvements in or relating to Ferromagnetic Screening Caps for Colour Picture Tubes having Rectangular Display Screens
IPC: H01J29/00
Filed: 1966-11-17
Abstract: 1,171,138. Demagnetizing cathode-ray tubes. PHILIPS ELECTRIC & ASSOCIATED INDUSTRIES Ltd. 17 Nov., 1966 [20 Nov., 1965], No. 51552/66. Heading H4T. [Also in Division H1] A ferromagnetic substantially conical screening cap for a rectangular screen colour television picture tube having recesses 2 (Fig. 1) to accommodate the tube support lugs is provided with two demagnetizing coils 5, 5 wound with portions 6, 6 (see also Figs. 3 and 4) outside the edges 3 of the cap so that the latter form cores for the coils and the invention is characterized that the coils, before following a generating line of the conical portion, extend along the edges as shown at 7 over a distance which is at least 1/6 and at most 1/3 of the length of the longer sides of the tube screen. The arrangement provides an even horizontal magnetic field (Fig. 2, not shown), when an alternating current of decreasing amplitude is supplied to the coils at each switching-on of the apparatus utilizing known techniques, which is stated to remove magnetization of the ferromagnetic components of the tube, due e.g. to the switching on-and-off of electrical apparatus in the proximity of the tube and to changes in the direction of the latter with respect to the horizontal component of the terrestrial magnetic field. In the arrangement of Figs. 3 and 4 the anti-implosion band 11 of soft ferromagnetic material forms a pole shoe for the cap 10.
Patent GB-1487946-A (GB)
Title: System to render constant the probability of false alarm in radar signals converted into numerical form
IPC: G01S7/292
Filed: 1974-11-29
Abstract: 1487946 Digital radar SELENIA INDUSTRIE ELETTRONICHE ASSOCIATE SpA 29 Nov 1974 [30 Nov 1973] 51746/74 Heading H4B In a digital radar video signal processing system wherein means are provided for analogue to digital conversion of an analogue radar signal the probability of false alarm is rendered substantially constant by injecting into the system binary random noise. In Fig. 5, the analogue radar signal 21 is quantized in converter 22 and outputted in digital form with M binary digits to digital delay line 23, and appears at central tap output 24. The preceding and following signals in time are respectively fed from one of N lateral taps 25 of delay line 23 to processing device 30. Random signal generator 26 provides digital noise comprising H binary digits to the input of second digital delay line 27 which is arranged in the same way as line 23. Device 30 adds each signal present on taps 25, the digital value of the noise represented on corresponding terminal 29 giving an output signal 31 consisting of M+H binary numbers. Comparison device 32 on comparting signals 24, 28 and 31 by majority logic, i.e. comparing a signal with the highest of the temporally preceding and succeeding signals supplies at its output the quantized video with, it is stated, the false alarm rate thereof rendered substantially constant and favourably approximates to an analogue system, without appreciable loss in sensitivity. It is shown graphically (Figs. 7 and 8, not shown) that by incrasing the value of a parameter m = 2H the approximation is successively improved and that m = 8 is said to be adequate.
Patent GB-1532810-A (GB)
Title: Apparatus for monitoring evaporation loss
IPC: G05D9/12
Filed: 1975-12-18
Abstract: 1532810 Automatic level control J W WALKER AND J P MAGILL 18 Dec 1975 51787/75 Heading G1A An apparatus for maintaining evaporation loss has an evaporimeter containing a liquid, first and second sensors positioned at different levels and connected to an electric circuit having means for controlling a refilling means and for indicating levels of the liquid. In the evaporimeter shown the first and second, i.e. zero set level, photo-resistors are mounted aligned with lensed end-point source lamps on a member displaceable in a vertical slot. The evaporimeter is initially filled to the zero line with distilled water which concentrates light on each photo-resistor. As water evaporates, from the cup which is filled with glass balls on a level with the zero line and connected by a flexible U-tube to the transparent scaled part of the vessel, the level falls so that one and then both photo-resistors receive less light. Potentiometer VR 1 , is set so that the voltage on the inverting input of amplifier A, is lower than its non-inverting input so that its output goes positive, so that transistor T4 conducts giving a collector potential of TTL'O'. The potentiometer VR 2  is set so that the voltage on the inverting input of amplifier A 2  is the higher, so that the output of transistor T 5  will be 'I'. For the RS bistable in the initial condition the outputs of gates G 1  and G 2  are 1 and 0 respectively, so that the zero indication lamp lights. As the level drops below the first photo-resistor transistor T 4  output rises to 1 and when it drops below the second photo-resistor, transistor T 5  output drops to 0, whereupon the RS bistable changes so that the outputs of gates G 1  and G 2  are 0 and 1, so that the refill lamp lights and relay RLA is energized causing the refill valve to be opened, the exhaust valve to shut, a water supply for a greenhouse to be turned on and causing audible warning. The RS bistable changes back when the level reaches the first photo-resistor again. Reference has been directed by the Comptroller to Specification 1438271.
Patent GB-1498154-A (GB)
Title: Aqueous impregnating resin solutions and a method for their production
IPC: C08L33/02
Filed: 1975-12-19
Abstract: 1498154 Laminates CASSELLA FARBWERKE MAINKUR AG 19 Dec 1975 [21 Dec 1974] 52089/75 Heading B5N [Also in Division C3] Laminates are prepared incorporating at least one layer, preferably of a fabric or paper web, impregnated with an aqueous resin solution which contains 30 to 65% by weight of solid resin, of which 80 to 99% by weight comprises a melamine resin precondensate and 1 to 20% by weight comprises a water-soluble copolymer of (by weight): (a) 15 to 80% of one or more esters of acrylic acid, methacrylic acid, crotonic acid, maleic acid or itaconic acid with an alcohol having 1 to 4 C atoms, vinyl acetate, versatic acid vinyl ester, acrylonitrile and/or methacrylontrile; (b) 0À5 to 60% of one or more hydroxyethyl or hydroxypropyl esters of acrylic acid, methacrylic acid, crotonic acid, maleic acid, or itaconic acid, acrylamide, methacrylamide, crotonamide, maleamide and/ or maleic hemi-amide and (c) 2 to 25% of acrylic acid, methacrylic acid, maleic acid, itaconic acid and for crotonic acid (see Division C3). The fabric or paper webs after impregnation are dried and pressed on to a wood-based material or a stack of resin-treated papers to form a decorative protective surface layer in the final product.
Patent GB-1282438-A (GB)
Title: Stereoscopic viewing apparatus with single axis optical system
Inventor: DAVIS ALLEN VAN CLEVE
IPC: G02B30/25
Filed: 1969-10-27
Abstract: 1282438 Stereoscopic viewing apparatus A V C DAVIS 27 Oct 1969 [6 Nov 1968] 52455/69 Heading G2J The image 10<SP>1</SP> of an object 10 may be projected on to a screen 12 by a uniaxial projection system 14 and yet it may seem to have a three dimensional form if two pairs of orthogonal polarizers are used as shown. The polarizers 18, 20 may be in contact with, or formed directly on, the objective of the projector 14 and if the projector inverts the image then the polarizer 22 would be of the polarization shown for 24 and vice versa for 24. The screen 12 may be omitted, e.g. as in a microscope.
Patent GB-525915-A (GB)
Abstract: 525,915. Slide buckles. BUTTONS, Ltd., and NICHOLLS, A. March 3, 1939, No. 6947. [Class 43] [Also in Group XXV] A wire slide comprising a rectangular frame a with movable cross-bar b for adjustable connection to a strap is pivotally connected by eyes c with the back plate d of a lever clip, the lever f of which is mounted in lugs e slotted as shown so that the clip may be applied to the edge of material wider than the clip. Tooth-like projections j may be provided to retain the material against movement out of place as the lever is being moved to the clamping position. The back - plate may be curved as shown, or may be provided with a trough-like transverse depression in the region engaged by the toothed edge i of lever f.
Patent GB-1365536-A (GB)
Title: Crystallisation column
IPC: B01D9/00
Filed: 1971-11-12
Abstract: 1365536 Countercurrent crystallizer NETHERLANDS CENTRAL ORGANISATION FOR APPLIED SCIENTIFIC RESEARCH 12 Nov 1971 [13 Nov 1970] 52594/71 Heading BIG A crystallisation column comprises a plurality of perforated plates positioned at spaced intervals in a column so that a crystal mass may pass the plates in countercurrent with a liquid, freely movable bodies are located between the perforated plates. If desired further movable bodies may be arranged on supporting elements below the perforated plates. The column may be subjected to vertical reciprocations by mounting it on a vibration unit. The movable bodies e.g. balls or spheres, may be set in motion by the unit to vibrate at a frequency of 100-10,000 per minute. If the balls are metallic they may be vibrated electromagnetically. As shown crystallizer 1, contains at one end a cooling mantle and a helical crystal scraper, and at the other end a melt section 2, including a heating coil. The column consists of four glass tube segments 3 connected together by flanged joints 4. Between each of the segments is connected a perforated plate 6 made from a fluorinated plastics material, by ring 9 and supporting plate 7 of similar material. The freely movable bodies are stainless steel balls 5. The column is jacketed with insulating material and flow controlled by two pumps 8. The column is used to separate cyclohexane from benzene, thiophene from benzene, benzoic acid or beta naphthol from naphthalene, and stearic acid from impurities.
Patent GB-1320427-A (GB)
Title: Muffler with reed valve providing continuous venting
IPC: F01N3/06
Filed: 1971-11-12
Abstract: 1320427 Exhaust gas silencers McCULLOCH CORP 12 Nov 1971 [28 Dec 1970] 52662/71 Heading F1B I.C. engine muffler for a small two-stroke engine driving a chain-saw comprises a housing 27, part of which forms an expansion chamber 28, having a gas outlet 30, a major portion of which is covered by the free end of a flexible elongate reed spring 32, the other end of the spring being clamped to the housing, so that the spring is deflected to an open position by the force of exhaust gases, the uncovered minor portion of the outlet 30 being continuously open to atmosphere to vent an amount of gas sufficient to prevent flutter of the spring when the engine is idling and floating of the spring when the engine is operating. The muffler is clamped to the exhaust port of the engine 19 by an adapter 42, the gas inlet and outlet ports being out of alignment to provide a tortuous path for the gas. The deflection of the spring is limited by a stop 47. A wire mesh spark arrester is fitted in the gas outlet. The spring covers 55-85 per cent of the outlet 30, when in the closed position. For an engine having a displacement of 2 to 8 cu. ins, the volume of the expansion chamber is 2 to 40 cu. ins, the area of the outlet 30 is 0À25 to 1À25 sq. ins, the exhaust gas pressure is 1 to 10 p.s.i. and the force required to flex the spring is 1 to 10 lbs.
Patent GB-1154600-A (GB)
Title: Lift.
Inventor: HOPFELD FRED PETER
IPC: B66F11/04
Filed: 1966-11-24
Abstract: 1,154,600. Railway vehicle undercarriages. GRAND SPECIALTIES CO. 24 Nov., 1966 [5 April, 1966], No. 52728/66. Heading B7L. [Also in Division B8] A lift comprises a base, a pair of rams 30 supported on the base, a pair of chains 38, each being anchored to the base at one end, being connected to a platform 16 at the other end and having an intermediate portion trained over one of the rams 30 so that vertical movement of the rams is accompanied by vertical movement of the platform, and an equalizer for assuring that movement of one ram through a predetermined distance is accompanied by movement of the other ram through substantially the same distance, the equalizer including a horizontally disposed shaft 71 carried by the platform, a sprocket 74 secured at each end of the shaft, and each sprocket being meshed with one of the chains 38 so that the chains become a track for the sprockets during vertical movement of the platform. The lift has a frame F, masts 12 fixed to the frame and masts 14 carrying the rams 30 and movable relative to the masts 12 by rams 20 and chains 28 similar to the rams 30 and chains 38, an equalizer being provided similar to that referred to above and including a shaft 61 on the masts 12 having sprockets 63 secured to it, the sprockets meshing with the chains 28. The masts 14 have rollers 42, 43 which engage guide channels in the masts 12, and the platform has rollers engaging guide channels in the masts 14. Back-up means (69), Figs. 2, 3, 4 (not shown), for the sprockets 63, 73 are provided. The lift is self-propelled with a steering handle H connected to a wheel turning mechanism 165 by a chain drive 164. An electric motor 166 drives ground wheels 168 and the lift is also supported by wheels 170, 171 and casters 174, 175. Tracks 176, 177 engaged by rollers 178, 179 on the frame F guide the latter but these may be omitted.
Patent GB-1379145-A (GB)
Title: Brush holder for electrical machines
IPC: H01R39/40
Filed: 1972-11-17
Abstract: 1379145 Brushgear ROBERT BOSCH GmbH 17 Nov 1972 [20 Nov 1971] 53113/72 Heading H2A A brush 19 is mounted in the hollow part 20b of a holder 20 by bending a resilient tongue 20d outwards such that a lug 23 on the brush may be forced into a channel 20c in the holder; on releasing the tongue and brush, a spring 22 presses the lug against the rear face of the tongue, and thereby retains the brush in position. The lug 23 may be a contact lead, as shown, or a pressed on dog (320) as described with reference to Fig. 5 (not shown). In the embodiment of Figs. 3, 4 (not shown), the brush is retained in the holder by permanently deforming two parts (120d) of the holder, e.g. by heating, after insertion of the brush. In the arrangement of Fig. 6 (not shown), a bayonet cap type fitting is used, the brush lug being retained in a U-shaped channel-(220c) after insertion of the brush.
Patent GB-1144418-A (GB)
Title: Improvements in control devices for internal combustion engines
IPC: F16J15/12
Filed: 1967-11-23
Abstract: 1,144,418. Ignition systems; controlling fuel injection. ROBERT BOSCH G, m, b. H. Nov. 23, 1967 [Nov.24, 1966], No. 53286/67. Heading F1B. A control device for triggering an operating process in an internal-combustion engine comprises a source of light 21, a light-sensitive electrical switching component 18 for producing a signal to trigger the operating process, an optical conductor 22 for directing a beam from the source of light on to the light-sensitive electrical switching component and a member 24 adapted to be moved by the engine for influencing the light beam. In addition to triggering the ignition operation the control device may be used for controlling petrol injection. A vacuum-operated ignition timing device 29 may be associated with the plate 28. A centrifugal timing device 30 is arranged between the member 24 and the distributer shaft 10. A capacitor may be discharged via the primary winding of an ignition transformer at the instant of ignition by the light-sensitive switching component. Modified arrangements of the optical conductor are described.
Patent GB-1443346-A (GB)
Title: Apparatus for atomizing and/or vaporising a liquid in a stream of gas
IPC: F02M29/04
Filed: 1973-11-16
Abstract: 1443346 Liquid atomizers; gas/liquid contacting H J SCHLADITZ 16 Nov 1973 [17 Nov 1972] 53354/73 Headings B1R and B2F [Also in Division Fl] ATOMIZING APPARATUS Apparatus for atomizing and/or vapourizing a liquid in a stream of gas, includes a porous body 2, Fig.1, traversed by the stream of gas and wetted by the liquid, which flow through a conduit, the porous body having a plurality of fibres 3, Fig. 2, orientated substantially parallel to the direction 4 of gas flow and formed from interconnected polycrystalline metallic or metallised whiskers, passages 9 through which gas flows also being present. The whiskers have a serrated surface, Fig. 4, (not shown) and overlap each other to form the fibres, Fig. 3, (not shown) and consist at least partially of at least one of the metals iron, nickel, aluminium, copper and silver. Upstream of the porous body is a porous insert 7 formed by a coarse skeleton of non-orientated polycrystalline metal whiskers and having relatively large pores which distribute the liquid, introduced by a spray 6, over the end face 8 of the porous body. The porous body may be formed from two spaced porous elements (15), (16), Fig. 5, (not shown) constructed in generally the same way as body 2 and being separated by a heating coil (17), Fig. 5, (not shown) which figure depicts the induction system of an internal combustion engine. An alternative use is in an air-humidifying plant. PRODUCTION OF POROUS BODY A method of producing a porous body comprises placing the whiskers in a magnetic field to align them into fibres, arranging the fibres formed by the whiskers parallel to one another and connecting them to form the body by deposition of a metal by thermal decomposition of a mteal compound such as a metal carbonyl. The body is arranged in a conduit for directing fluid through the body in the direction of alignment. The same method may be used to connect one or both ends of the paths to a porous plate 5, Fig. 2.
Patent GB-1321165-A (GB)
Title: Dice
IPC: A63F9/04
Filed: 1971-11-18
Abstract: 1321165 Dice D J THOMSON and M G THOMSON 18 Nov 1971 [14 Jan 1971] 53571/71 Heading A6H An icosahedral die has two sets of the numbers one to ten marked on its faces, one number to each face. One set of numbers are indicated as positive and the other set as negative.
Patent GB-1031733-A (GB)
Title: Improvements in or relating to hydraulic pumps and motors
IPC: F01B3/10
Filed: 1963-01-08
Abstract: 1,031,733. Reciprocating pumps and motors. C. VAN DER LELY N.V. Jan. 8, 1963 [Jan. 26 ,1962], No. 53727/65. Divided out of 1,031,731. Heading F1A. In a pump or motor having a relatively rotatable cylinder block and valve plate, hydraulic balancing of the valve plate is effected by recesses 81, 82 connected to the high pressure kidney port 31 and recesses 83, 84 connected to the low pressure kidney port 32, the recesses co-operating with arcuate recesses in the cylinder block face (Fig. 1, not shown) equal in number to pistons in the block, and the distance between each block recess and the axis of rotation being equal to that of each valve plate recess, and the distance between two valve plate recesses 81 and 84 or 82 and 83 being greater than the length of any one of the block recesses. The distance between recesses 81 and 82 or 83 and 84 is less than the length of any one of the block recesses. Leakage groove 38 and recess 39 communicate with the side of the valve plate.
Patent GB-538990-A (GB)
IPC: G03C7/06
Abstract: 538,990. Colour filters. TECHNICOLOR, Ltd., HAPPE, L. B. K., and WILLIAMSON, C. M. Feb. 20, 1940, No. 3170. [Class 97 (i)] Colour filters comprise two or more layers each consisting of elements forming a pattern and having different transmission characteristics ; the layers are relatively movable. As shown, two layers A, B, comprising yellow strips absorbing waves shorter than 4500 A, in alternation with clear spaces, are relatively slidable from the position shown, in which all wave lengths less than 4500 A are cut off, through all positions to one in which the strips are in register and 50 per cent. of the light of shorter wave length is allowed to pass. The clear strips may be replaced by strips passing wave lengths greater than 4000 A, or by opaque strips. The strips may be sectorial, relative movement being effected by rotation. The layers may be placed between the elements of a compound lens, may have pattern elements of such small size as not to be discernible, or may be otherwise associated with means for rendering the light substantially uniform.