baber/WOPTO huggingface dataset:
Patent GB-1395600-A (GB)
Title: Current control circuitry
IPC: H01S3/134
Filed: 1972-12-04
Abstract: 1395600 Lasers XEROX CORP 4 Dec 1972 [6 Dec 1971] 55821/72 Heading H1C [Also in Division H3] A current supply arrangement for a high voltage, low current device, e.g. a laser 10, comprises a series-connected chain of transistors 12, 13, 14, in series with a further transistor 15, to the base terminal 22 of which is applied a voltage which determines the current through the series-connected chain and hence the device 10: the leakage currents I CBO  of the transistors 12, 13, 15 are, according to the invention, conveyed to the emitter of the transistor 15 by means of a voltage-limiting diode 21. Similar voltage limiting diodes 19, 20 may shunt the resistors 17, 18 in the bias network for the bases of the transistors 12, 13, 14. The emitter circuit of the transistor 15 includes resistors 23, 24 shunted by the collector to emitter path of a transistor 28 which may be driven by means of a further transistor 27, to the base terminal 26 of which may be applied either pulses which cut off the current in the series-connected chain, or alternatively current-modulating signals. In a simplified circuit, the collector to emitter path of a single transistor is connected across one resistor (24, Fig. 1, not shown) and its base pulsed. The transistors 12, 13, 14 may be replaced by Darlington pairs.
Patent GB-1443350-A (GB)
Title: Method of evacuating a capsule which encloses a body of powder
IPC: B28B3/00
Filed: 1973-12-03
Abstract: 1443350 Isostatic hot pressing apparatus ALLMANNA SVENSKA ELEKTRISKA AB 3 Dec 1973 [4 Dec 1972] 55912/73 Heading C7D [Also in Division B5] Sintered bodies such as high speed steel and super alloy billets are produced by isostatic hot pressing the powder 7 which is packed in a can 1 having a vacuum opening 9 in a wall 4 and subjecting the wall 4 to an external force sufficient to form a gap 25 between the powder and the wall prior to isostatic hot pressing. The vacuum opening 9 is provided by the externally threaded sleeve 8 which is connected to unit 12 by nut 13. As the nut 13 is screwed into the sleeve 8 to connect the can 1 to the vacuum connection 15 the sleeve is drawn upwards against washer 14 so forming a gap 25 between the can wall 4 and the powder 7. The opening 9 in sleeve 8 is sealed after evacuation by a plug 16 suspended from piston-rod 18 in nut 12.
Patent GB-1275060-A (GB)
Title: Electro-mechanical transducer apparatus for measuring or detecting mechanical displacements
Inventor: LEADBEATER DOUGLAS ALBERT
IPC: G01G3/08
Filed: 1968-11-27
Abstract: 1275060 Measuring displacement electrically GEORGE SALTER & CO Ltd 27 Nov 1969 [27 Nov 1968] 56194/68 Heading G1N In an electro-mechanical displacement transducer in which the output frequency of an oscillator is varied in accordance with the displacement of a rectilinearly movable sensing member according to a predetermined functional relationship, means are provided for selectively providing fine adjustment of the relationship over different selected portions of the working range of movement of the sensing member. In the embodiment shown in Fig. 2 the transducer comprises a brass tubular body/10a within which is coaxially mounted in sleeve 22a an inductance coil 11a and a central slidable plunger 12a carrying metal slug 14a, the latter forming a variable capacitor with the body portion 15a. Centre part 35a of the plunger 12a has a middle section 75 composed of compacted iron dust and together with sleeve 22a, also containing iron dust, and coil 23a forms a variable inductance. The inductance and capacitance form a parallel tuned circuit of an oscillator, Fig. 3 (not shown) and when the plunger 12a is axially moved in response to movement of the member whose displacement is to be measured and which is coupled to the plunger at 35a the change in values of the capacitance and inductance result in the oscillator operating at a different frequency. Thus the frequency of oscillation is a measure of the displacement of the member coupled to the transducer. The response characteristic of the transducer is modified by means of adjustable screws 71 which together with metal disc 72 on the end of the plunger alter the capacitance. Alternatively Fig. 1 (not shown) a vane of insulating material carrying a conductive coating can be provided instead of disc 72 and this is positioned to be opposite to an aperture of the outer cylinder which is obscured by moving a ring of wire across it. In the embodiment of Fig. 4 the sensing element comprises a movable plate 93 of a parallel plate 90 capacitor and which is connected in parallel with inductance 94 in an oscillator circuit. The apparatus may form part of a weighing apparatus Fig. 4 and Fig. 6 (not shown). The outputs from the oscillator may be applied to a timer counter which displays the displacement in digital, analogue form or which controls a printing device. Alternatively the output may be applied to a radio receiver or VHF transmitter. A visual display may be obtained on an oscilloscope.
Patent GB-1495158-A (GB)
Title: Method of rendering artificial or natural structures moisture-proof
IPC: C04B41/45
Filed: 1975-12-31
Abstract: 1495158 Impregnating structures with water repellant BALFOUR BEATTY Ltd 31 Dec 1975 [31 Dec 1974] 56234/74 Heading D1P Part or all of a natural or artificial structure of stone, brick, timber, concrete or other building material in contact with the ground is waterproofed by applying suction to a surface of the structure to withdraw air or other fluid from pores and/or other voids within the structure and then, whilst continuing to apply suction allowing a water repellant material to flow through another surface into the structure at least to impregnate the boundary surfaces of the pores and/or voids and thereby form a substantially fluidimpermeable barrier. Preferably the process is used to form a damp - proof course. A transparent polythene sheet 15 is applied to part of one surface of brick wall 11, the edges of the sheet being sealed to the wall by putty or adhesive tape. A preformed duct 16 of transparent material overlys an opening in sheet 15 and allows vacuum to be applied. Preferably the wall is heated either by radiant heaters directed at the opposite side of the wall (Fig. 1a not shown) or by heating air drawn through inlet 21 of a polythene sheet 19 spaced from wall surface 14 by a layer of nylon mesh. The water repellent is then placed in channel 22 so that it is drawn through the wall 11' by the suction, suction is stopped when water repellent collects in duct 16. Channel 21 is formed by two strips of sheet 19 separated by spacers (25, Fig. 3 not shown). In another embodiment the water repellent is soaked in a strip (9, Fig. 1c not shown) of sponge and the strip is secured to the surface of the wall opposite to the vacuum source. The water repellent may be applied at a pressure of 50-60 lbs/ sq. in. a reciprocating. piston and cylinder connected to the pipe carrying the water repellent may be used to produce periodic pressurisation. Manual or mechanical, preferably ultrasonic vibration may be applied to the structure to shake out bubbles of air. Water repellent. The water repellent is preferably a silicone liquid. Where the structure is extremely porous hardenable low viscosity nolyester, epoxy or acrylic resins may be used Cracks may be filled in with the waterrepellent resin and the resin allowed to harden before water repellent material is sucked into the structure to coat the boundary surfaces of the pores.
Patent GB-1134259-A (GB)
Title: 1,4,5-triamino-8-hydroxy-anthraquinone
Inventor: PETERS KARL-HEINZ
IPC: C09B1/503
Filed: 1966-12-19
Abstract: 1,134,259. Anthraquinone dyes. FARBENFABRIKEN BAYER A.G. 19 Dec., 1966 [13 Jan., 1966], No. 56739/66. Heading C4P The invention comprises compounds of the formula where X is halogen and Y is hydrogen or halogen. The compounds are prepared by reacting a cyclic sulphamide ester of the formula or a cyclic sulphimide ester of the formula with sulphur in oleum.
Patent GB-1187365-A (GB)
Title: Motor Vehicle Friction Clutch
IPC: F16D13/72
Filed: 1968-11-29
Abstract: 1,187,365. Friction clutches. RIFF INDUSTRIA FRENI FRIZIONI S.r.1. 29 Nov., 1968 [1 Dec., 1967; 15 June, 1968], No. 56814/68. Heading F2C. In a friction, clutch having a disc spring 11, Fig. 2, deformation of the spring is aided by fulcra 17, 16 which are formed respectively on a strap 18, riveted to the clutch cover 3 and on the cover itself. The straps 18 are located in radial slots in the pressure plate 10 and pass through holes 21 in the cover. Straps 14 hold the spring in contact with the pressure plate 10 and ventilating holes 27 are provided in the cover 3. In a second embodiment, Fig. 8, the spring 11 is attached to the cover 3 and pressure plate 10 by projections 31 carried by the fulcra 16, 17. The projections 31 are formed by embossing one of the fulcra or by riveting them together in such a way as to permit axial movement. A spring 33 with clip-portions 34 holds the disc 11 in contact with the pressure plate 10.
Patent GB-1328587-A (GB)
Title: Method and apparatus for inductively heating and quenching elongated workpieces
IPC: H05B6/02
Filed: 1971-12-08
Abstract: 1328587 Heating and quenching apparatus PARK-OHIO INDUSTRIES Inc 8 Dec 1971 [14 Dec 1970] 56939/71 Heading C7N [Also in Division H5] An elongated element e.g. an axle shaft 122, is heated and quenched by supporting it in a pair of recesses 106 in arms 100,102 of a reciprocating shuttle unit G, indexing the shuttle unit forward in direction a so that the element is directly beneath an elongated heating inductor 10, raising the element into coupling relationship with the heating inductor 10 by means of a Vee-elevator F which comprises a rectangular frame 90 with two pairs of axiably spaced Vee blocks 92, moving head stock C and tail stock D towards each other until chuck 44 engages and grips one end of the element and the nose 62 of centering means 58 engages the other end of the element, lowering Vee-elevator F and simultaneously raising lateral restraint E so that rollers 86 laterally support the element, rotating the element whilst the inductor is energised, returning the shuttle G during the heating so that a fresh element may be placed therein, moving the head stock C and tail stock D apart at the end of the heating cycle, lowering the element by means of lateral restraint E into a work station 112 in shuttle arms 100, 102, indexing the shuttle unit G in the direction a until the element is beneath a quenching unit 30 which is parallel to and coextensive with the inductor 10, and then raising the element into working relationship with the quenching unit, rotating the element whilst quenching, and lowering the element in the manner previously described. During normal operation one element is heated whilst another is being simultaneously quenched.
Patent GB-1363878-A (GB)
Title: Devices for driving electric power operated tools
Inventor: HALLERBECK STIG LENNART
IPC: B24B23/02
Filed: 1971-12-08
Abstract: 1363878 Grinding SKF INDUSTRIAL TRADING & DEVELOPMENT CO BV 8 Dec 1971 [8 Dec 1970] 57094/71 Heading B3D [Also in Division H2]  An electric power operated tool such as a hand held grinding tool comprises a resiliently deformable housing 1 of, for example, plastics material in which the stator 2 of an electric motor is resiliently supported by rubber blocks 8 or an annular resilient member, the rotor shaft 4 of the motor extending from one side of the stator and out through an opening in the housing and being supported by bearings 6, 7 in the stator and a further bearing in the opening. The further bearing may be resiliently supported in the opening by means of a cup (13), Fig. 3 (not shown) formed with a corrugation (15) between the bearing and the opening or attached to the opening by a rubber element.
Patent GB-1205418-A (GB)
Title: Fanfold stacking apparatus
IPC: B41J15/16
Filed: 1967-12-19
Abstract: 1,205,418. Folding paper. RANK XEROX Ltd. 19 Dec., 1967 [22 Dec., 1966], No. 57507/67. Heading B8R. A web having transverse weakening lines 12, 14 is fed through rollers 36, 37 over a tray 38 and into a fanfolded stack 15 on a base member 22, the trailing edges being engaged and aligned by an upstanding member 24 and the leading edges being engaged by retarding means comprising at least one flexible member 16, such as a bead chain, secured at one end to a bar 34 through a link 19 and a non-friction member 18 resting on the tray 38, while the lower end hangs in a slot in the member 22. For lightweight webs, the leading edges may be positively advanced downwardly along the retarding means by an air blast from a source 26.
Patent GB-1170770-A (GB)
Title: Method of Improving the Recovery of Sugar from Sacchariferous Plants
Inventor: SWIHART JOHN ROGER
IPC: C13B10/00
Filed: 1966-12-23
Abstract: 1,170,770. Sterilizing extraction apparatus, harvested sugar-containing plant products and extracted juices. DIVERSEY Ltd. 23 Dec., 1966 [3 Feb., 1966], No. 57651/66. Heading A2D. [Also in Division C6] In a process for improving the extraction of sugar from harvested sugar-containing plant products, such as sugar-canes, sugarbeet, sorghum, saccharatum, pineapples, oranges, apples and grapes, a sterilizing composition, preferably in the form of an aqueous sterilizing solution, containing mixed available chlorine and bromine, is applied to the extraction apparatus, the plant products and the extracted, raw, sugar-containing juice in an amount sufficient to reduce or inhibit contamination by micro-organisms, such as bacteria, yeasts, moulds and slime-producing microorganisms, which might lower the purity of the extracted juice and, consequentially, the yield of sugar. The amount of sterilizing solution applied, as by spraying, may give a total of 5 to 150, e.g. 5 to 25 p.p.m. of available chlorine and bromine in the extracted juice, based on its weight. The applied solution may contain between 0.05 and 5 p.p.m. of available chlorine and bromine based on the weight of the harvested plant products. A suitable dry sterilizing composition, which may be dissolved in water to furnish a sterilizing solution, comprises the following ingredients in dry granular form and in percentages by weight: sodium hypochlorite 3.25 per cent; potassium or sodium bromide 2.00 per cent; sodium phosphate 12 H 2 0 (or any other water-soluble alkali metal phosphate) 89.92 per cent; and sodium chloride 4.83 per cent. The presence of a water-soluble, alkali metal phosphate is not essential. U.S.A. Specifications 1,555,474; 1,965,304; 2,802,757 and 2,815,311 are referred to.
Patent GB-1409087-A (GB)
Title: Hauled vehicle transport system for a transport or material handling installation
Inventor: LAURENT R
IPC: B61B9/00
Filed: 1972-12-14
Abstract: 1409087 Transport systems POMA 2000 SA 14 Dec 1972 [24 Dec 1971] 57654/72 Heading B7L [Also in Division B8] A passive individual hauled vehicle transport system comprises an endless traction cable 32 extending along a track 10, 12 on which the vehicles 14 run, each vehicle 14 having a respective operable cable-gripping device 18 for clamping on to the cable 32; grooved support wheels 36 and hold-down wheels 38 spaced along the cable 32 to guide the same; and a respective support lever 42 for each wheel 38 which is movable, between a working position guiding cable 32 and a retracted position, as in Fig. 5, when lever 42 is actuated on the passing of a vehicle 14 by a device 52 carried by the vehicle. Device 52 is a cam formed by an inverted U- shaped rail which engages a follower roller 46 on the lever 42, which is biased towards its working position against a stop 50 by a spring 48. The grips 18 are arranged at a higher level than the wheels 36 so that the cable 32 is disengaged from the groove of a wheel 36 while a vehicle 14 is passing that wheel. As in Fig. 4, the cam rail 52 has a symmetrical shape such that each lever 42 is pivoted about its pivot 44 so as to move the wheel 38 from its working position to the retracted position while the vehicle 14 and its associated grip 18 are passing, and then back to its working position engaging the cable 32.
Patent GB-1168260-A (GB)
Title: A Television Receiver Cabinet
IPC: H04R1/02
Filed: 1966-12-30
Abstract: 1,168,260. Television receivers; cabinets. MOSKOVSKY RADIOZAVOD. 30 Dec., 1966 [30 Dec., 1965], No. 58459/66. Headings H4F and H4J. A television receiver cabinet 4 comprises a trough-shaped chamber 1 at the cabinet bottom disposed so that the tip of the trough is transverse of the cabinet. Front and rear trough walls subtend an angle of substantially 90 degrees. A loud-speaker 2 is mounted to cover an opening in the rear trough wall and thereby communicate with the chamber. For forwards transmission of sound, a box-shaped sound waveguide 12 is provided having a bottom wall 11, a transverse rear wall 18 and side walls 9, 10. Wall 11 extends forwardly of the chamber. Preferably the rear trough wall extends into waveguide 12 so that a resonant volume is provided between the rear trough wall and rear of waveguide 12. The bottom of the waveguide 12 terminates rearwardly of the cabinet front panel and extends forwardly beyond the chamber, and the cabinet is provided with legs or runners extending downwardly of the bottom of waveguide 12. An external waveguide terminating in a front slot 14 is provided when the cabinet is placed on a table.
Patent GB-1347080-A (GB)
Title: Highly precise and stable logarithmic circuit
IPC: G01R15/00
Filed: 1971-12-17
Abstract: 1347080 Logarithmic junction generators YOKOGAWA ELECTRIC WORKS Ltd 17 Dec 1971 [29 Dec 1970] 58672/71 Heading G4G [Also in Division G1] The logarithm of an input signal is derived by a circuit which synthesizes a junction closely approximating the power series expansion for - log (1-x), viz. As shown, an input terminal receives a current I in  of the form I in  = I o e<SP>-y</SP> where I o  is a constant reference current and y is a variable to be measured. For convenience we consider the variable x = 1-e<SP>-y</SP>, so that I in  = I o (1-x). A current equal to I o  generated by source 14 is subtracted from the signal I in  and the difference signal is applied to feedback amplifier 12 whose output is E x  = -E o x where E o  is a reference voltage proportional to I o (E o  = I o R s2 ). The signal E x  is fed to a voltage divider R 1 , R 2 , R 3  from which are derived, at the junctions indicated, two voltages-- E d1  = -aE 0 x and E d2  = -(1-a)E o x respectively proportional to a and (1-a) where a is approximately equal to 1/#2. The first voltage E d1  is added to a voltage from source 18 equal to E o , to give E s1  = E 0 (1-ax), and this signal is used as the divisor in a dividing circuit 20 where a dividend equal to E<SP>2</SP> o  is provided by voltage sources E a , E b  where E a E b  = E<SP>2</SP> o . The output quotient E p  = E o <SP>2</SP>/E s1  is given by: E q  = E o /(1-ax). The second voltage E d2  is also added to E o  to produce a voltage E s2  = E o  - (1-a)E o x. Finally, subtraction circuit 24 provides an output given by: E out =E q -E s2 =E o [1/(1-ax)-1+(1-a)x] The bracketed expression may be expanded to yield the series:- x + (ax)<SP>2</SP> + (ax)<SP>3</SP> ... which, upon substitution of a = 1/#2, may be seen to provide a close approximation to the power series for - log (1-x).
Patent GB-1374880-A (GB)
Title: Bumper assemblies for vehicles
IPC: B60R19/26
Filed: 1972-12-20
Abstract: 1374880 Bumpers DAIMLER-BENZ AG 20 Dec 1972 [21 Dec 1971 11 April 1972] 58806/72 Heading B7J A vehicle bumper assembly comprises a bumper body 2, Fig. 3a, which is supported by elastomeric blocks 13 in the direction transversely of a shock absorber 10, the end of which adjacent the front of the bumper body 2, in use, is received in an elastomeric insert 12, arranged so that the shock absorber 10, on the one hand, and the elastomerie blocks 13 and insert 12 on the other hand, act in series. The elastomeric insert 12 and blocks 13 are accommodated within a pocket 4, secured in the bumper body 2, and extend to a rod part 9 of the shock absorber 10 where they abut shoulders 14. The bumper body 2 is faced by a rubber strip 15 and may alternatively, Figs. 2 and 3b (not shown), consist of two body parts one above the other with the pocket 4 secured between them. The pocket 4 may receive two shock absorbers 10 in the same horizontal plane but at an acute angle to one another, Fig. 3b, which are interconnected at their rod parts 9 by blocks 13 and are received at thier ends by a common insert 12. While in the above forms the pocket 4 is inserted from the rear of the body 2, it may alternatively be inserted from the front as in Fig. 4 where pocket 4 is of rectangular or oval cross-section to receive a shoulder 14 having flattened sides to form a bayonet type of connection. As shown in Fig. 6, the shock absorber 10 carries a shell member 25 which includes radially extending trunnion pieces 24 fixed in elastomeric blocks 26 which are precompressed by a wall 27 and cover 28. The pieces 24 may be of non-circular cross-section. The insert 12 is secured to webs 22 of the bumper body 2 with its front face 23 spaced from the front wall of the body 2, so that the shock absorber 10 can freely pivot about the pieces 24.
Patent GB-589261-A (GB)
Abstract: 589,261. Heating mattresses. THERMALUX ELECTRICAL PRODUCTS, Ltd., and SYKES, A. March 21, 1945, No. 7088. [Class 39 (iii)] [Also in Group XIV] An additional covering layer B is applied to the top or bottom surface of a mattress A to form a pocket for an electrically heated pad C, the layer being secured on some or all of its sides to the mattress casing by sliding clasp fasteners H or other releasable fastenings. Specification 400,301, [Group XXXVI], is referred to.
Patent GB-1341749-A (GB)
Title: Photosensitive diazotype materials
IPC: G03C1/60
Filed: 1971-12-20
Abstract: 1341749 Diazotype materials DEFIANCE - AZON CORP 20 Dec 1971 [8 Jan 1971] 59178/71 Heading G2C An erasable two-component diazotype material comprises a support of translucent or transparentized paper coated with a polymeric layer and with a layer containing a water soluble cellulose derivative, a water-soluble melamine- or urea-formaldehyde cross-linking resin, a diazonium compound, an azo coupler and an organic acid of pk between 2À5 and 4À5. The light-sensitive layer may contain silica to help erasibility. In the examples, paper is impregnated with polystyrene to render it translucent, coated with a barrier layer of styrene/butadiene copolymer or polyethylene and then coated with a light-sensitive layer containing hydroxyethyl or methyl cellulose as the cellulose derivative. The material may be imagewise exposed and developed and unwanted image removed with a rubber eraser.
Patent GB-1270159-A (GB)
Title: Photographic materials
Inventor: BREDOUS FRANCOIS-JEAN-MARIE
IPC: G03C1/725
Filed: 1969-12-18
Abstract: 1,270,159. Photo-sensitive materials and processes. EASTMAN KODAK CO. Dec. 18, 1969 [Dec. 18, 1968], No. 61756/69. Heading G2C. A photo-sensitive material comprises a support bearing a layer containing an amine (including heterocyclic amines) metavanadate of an amine having a pKa of at least 8 and a binder. If the binder is proteinaceous, a positive relief image is formed an imagewise exposure and washing to remove the exposed areas. If the binder is not proteinaceous (e.g. ethyl cellulose or a vinyl polymer), a negative print-out image is formed on imagewise exposure. This image may be intensified by (a) heating and then washing with water to fix the image or (b) ammoniacal solution of a reducible silver salt which simultaneously fixes the image. The image may be transferred to a receiving sheet containing a reducible organic silver salt (e.g. silver behenate) by heating the exposed layers and sheet in contact to produce a silver-image on the sheet.