baber/WOPTO huggingface dataset:
Patent GB-1495283-A (GB)
Title: Vacuum switching apparatus
IPC: H01H31/00
Filed: 1974-12-10
Abstract: 1495283 Vacuum switch HAZEMEIJER BV 10 Dec 1974 [21 Dec 1973] 53396/74 Heading H1N A vacuum switch has a rigid member 2, Fig. 1, 26, Fig. 2 that serves as a bridging contact and as a barrier which is earthed, when the switch is opened to prevent a surge voltage from interconnecting by arc-over the line contacts 3, 4, Fig. 1, 21, 22, Fig. 2, when they are otherwise disengaged. Fig. 1 shows a vacuum switch in which a fixed conductive barrier 2 bridges two moving contacts 3, 4 when the switch is closed. Barrier 2 is earthed by a pin 17 engaged in a hole 16 in barrier 2 after the switch is opened. Fig. 2 shows a vacuum switch which has a tubular moving bridging contact 26, respectively with a barrier 25, respectively between stationary contacts 21, 22. The rod 27 that carries the moving contact 26 also carries an earthing contact 31 that co-operates in a fully open position with a stationary earthing contact 30. In Fig. 3 (not shown) the moving earthing contact (43) is mounted on the tubular bridging contact (40). In Fig. 4 (not shown) a stationary contact (48) is carried on a rod (49), a second tubular stationary contact (50) and a tubular barrier (56) are coaxial and concentric therewith. Moving bridging contact (51) that carries a barrier (56) co-operates in the switch open position with a fixed earthed contact (55) which is a part of the switch casing. A coil to produce an axial magnetic field may surround the housing.
Patent GB-1163535-A (GB)
Title: Radiation decay analyser
Inventor: THREADGOLD PHILIP
IPC: G01T1/30
Filed: 1965-12-16
Abstract: 1,163,535. Radio-active borehole logging. BRITISH PETROLEUM CO. Ltd. Dec. 15, 1966 [Dec.16, 1965], No.53451/65. Heading G1A. A borehole is logged by transmitting pulses of radiation into the formations surrounding a logging sonde, measuring the intensity of induced gamma activity at a number of instants at varying times after the exciting pulse and transmitting the measurements to the surface as pulse position modulated time multiplexed signals. A scintillation detector D is synchronized with a pulsed neutron source NS to detect induced radiation from the formations in the intervals when the source is not emitting. AND gates E1-E23 are opened in sequence so that the output of detector D passes into 23 channels corresponding to different times after the exciting pulse. The pulses are standardized by monostable circuits M1-M23 and integrated by integrators I1-I23 to produce signals representative of the number of pulses received in each channel. The outputs of integrators I1-I23 are fed in turn through sequentially operated AND gates A1-A23 to a multiplex transmitter TT. In TT the analogue signals from the integrators are converted into pulse position modulated signals and transmitted up the logging cable to a multiplex receiver TR which distributes the position modulated pulses through 23 AND gates B1-B23, to stores ST1-ST23. The contents of the stores may be displayed on a C.R.T. in the form of the decay curve of induced radiation in the formations, and the contents of selected combinations of stores may be displayed on indicators IND1-IND5 by suitable closure of switches SS1-SS115. The ratio of selected channels may be displayed on a ratio meter RM. The synchronizing pulses for the neutron source NS and detector D and the various gates are provided by a multi cathode discharge tube as described in Specification 1,095,630. The pulses passing a selected one of gates E1-E23 into a corresponding channel may be applied to a pulse height analyzer and the results of the analysis transmitted up the logging cable as pulse position modulated time division multiplexed signals as described in Specification 1,095,630.
Patent GB-1200217-A (GB)
Title: Strainer cloth of polyester yarn
IPC: D06M15/267
Filed: 1967-11-24
Abstract: 1,200,217. Coated filaments. GLANZSTOFF A.G. 24 .Nov., 1967 [26 Nov., 1966], No.53517/ 67. Heading B2E. [Also in Division D1] In a multifilar polyester yarn (intended for weaving into a strainer fabric of open construction) the individual filaments have an uninterrupted coating in amount of 15-20% based on the yarn substrate and constituted by crosslinked acrylic resin material and are stretched 'by up to 1.5%. The coating is applied by immersion impregnation, roller squeezing, hot stretching and drying of an untreated yarn or groups of filaments and cross-linking is effected by addition of alkanolamine hydrochloride. The impregnating liquid is an aqueous dispersion composed of an acrylic acid copolymer of butylaurylate and acrylonitrile and an etherified melamine resin precondensate.
Patent GB-1452301-A (GB)
Title: Direct positive silver halide emulsions
IPC: G03C1/485
Filed: 1973-11-20
Abstract: 1452301 Photographic direct-positive silver halide emulsions AGFA-GEVAERT 20 Nov 1973 [8 Dec 1972] 53859/73 Heading G2C Photographic direct-positive silver halide emulsion of improved photo-sensitivity comprise silver halide grains which are fogged to a degree as defined in the Specification, which are monodisperse i.e. have a grain size distribution such that at least 95% by weight of the silver halide grains do not differ by more than 40% from the average grain size, and which have a silver iodide content of 1 0 to 20 mol. per cent. The grains may have interior electron traps and may be core and shell grains in which the cores may be sensitized with noble metal and/or sulphur compounds or by reduction and the shells are fogged. The emulsions may contain developing agents and in processing the activator or developer solutions may be free from halide ions. The processing solution may be applied as a viscous solution e.g. from a rupturable container. Specification 1452302 is referred to.
Patent GB-1403453-A (GB)
Title: Components for variable resistances
IPC: H01C10/34
Filed: 1972-11-23
Abstract: 1403453 Variable resistors WALTER PREH GmbH 23 Nov 1972 [23 Nov 1971] 54260/72 Heading HIS A variable resistance element comprises an insulating member 1, with connecting elements 2 embedded therein so that the top surface is in the same plane as the surface of member 1, a resistance element, which is a film 2, which a sliding contact slides over, and an annular contact element 4, which is embedded in member 1 and has a connecting portion 6 and surrounds a central aperture 5, which receives an actuating shaft (not shown). Member 1 may be made from hard paper, glass fibre-reinforced epoxy material or anodized aluminium covered by varnish or plastic. Material in the form ofÀa strip with perforations along both edges to facilitate positioning, punching and stamping may be used in the manufacture of a plurality of components (Fig. 3, not shown). Elements 2, coated underneath with a temperature activated adhesive may be copper foil 0À03 mm, thick coated with tin or an alloy of 95% lead 5% tin 0À005 mm. thick and embedded in member 1 by heating and pressure. The resistance film is then applied by spraying or printing and then burnt or calcined. Bridges retained between the components are then removed. The variable resistance component may also be of a multiple slide linear type (Figs. 4 and 5, not shown) and resistance tracks may be formed on both sides of the insulating member. The component may also be part of a potentiometer.
Patent GB-1244415-A (GB)
Title: Process and plant for etching copper and copper alloys, in particular copper-coated laminated materials
IPC: C23F1/08
Filed: 1969-11-06
Abstract: 1,244,415. Etching. SABA SCHWARZWALDER APPARATE - BAU - ANSTALT AUGUST SCHWER SOHNE G.m.b.H. 6 Nov., 1969 [7 Nov., 1968], No. 54532/69. Heading B6J. Copper or copper alloy, e.g. copper-coated laminated materials for the production of circuit plates, are etched by immersion or spray with cupric chloride, which is regenerated with hydrochloric acid and hydrogen peroxide under the control of the redox potential of the etchant. The etchant is recirculated to sprays 4 by pumps 6, 7. The hydrochloric acid and hydrogen peroxide is supplied from tanks 8, 9 through magnetic valves 10, 11 and pumps 12, 13 controlled by an applicator 15 comprising an amplifier amplifying the potential determined by the redox electrode 14, and a measuring instrument for the potential having a pointer co-operating with two sensors to generate a signal when the potential dips to a certain point with increase in the concentration of cuprous ions, and the arrangement being such that the valve for the hydrochloric acid is opened first and closed last.
Patent GB-1487589-A (GB)
Title: Process for the manufacture of pure cyclopentene
IPC: C07C6/06
Filed: 1974-12-18
Abstract: 1487589 Cyclopentene CHEMISCHE WERKE HULS AG 18 Dec 1974 [21 Dec 1973] 54589/74 Addition to 1467504 Heading C5E Cyclopentene, free of conjugated dienes, is prepared by contacting at above 0‹ C. cis,cis-1,6- cyclodecadiene with a heterometathesis catalyst comprising an oxide of group 6a or 7a element on a support. Preferred catalysts are oxides of Mo or Re on SiO 2  or Al 2 O 3  containing alkali metal ions. The reaction may be carried out at 40-180‹ C. in a hydrocarbon or halohydrocarbon solvent.
Patent GB-1404478-A (GB)
Title: Centrifugal blasting wheel
IPC: B24C5/06
Filed: 1972-11-27
Abstract: 1404478 Blasting WHEELABRATOR. FRYE Inc 27 Nov 1972 [5 April 1972] 54681/72 Heading B3D The subject matter of the present Specification is identical with that of Specification 1,404,479 but the main claim is directed to a centrifugal blasting wheel in which the blades can be inserted between the side walls of the wheel through a central opening in one of the side walls.
Patent GB-1260764-A (GB)
Title: Improvements in or relating to fasteners
Inventor: SIEGEL KARLHEINZ
IPC: A44B19/16
Filed: 1969-11-07
Abstract: 1,260,764. Strip fastener. K. SIEGEL. 7 Nov., 1969 [8 Nov., 1968], No. 54742/69. Heading E2S. A fastner of the longitudinal rib and groove type has a rib 6 with a mushroom like section, co-operating with a groove having two undercut hooks 8, 9. Mounting strips 3, 4 are connected to the elements in plane X-Y. A groove 18 is provided so that hooks 8, 9 pinch together when opening forces are applied in plane X-Y. The fastner may have a slider 15 (Fig. 2, not shown) and slider guide ribs 13, 14. The section of the fastner may be circular (Fig. 3, not shown).
Patent GB-1242434-A (GB)
Title: Light unit assembly
IPC: G03B27/16
Filed: 1968-11-19
Abstract: 1,242,434. Lamps. BERKEY PHOTO Inc. 19 Nov., 1968 [18 Dec., 1967], No. 54825/68. Heading F4R. [Also in Divisions G2-G3] A light unit assembly comprises a housing 11, a main reflector 12, a metal additive lamp 14, a shutter control means 16 for a shutter unit 17, a fan 15 on the rear of the housing for passing cooling air in through an aperture 51 in the housing and an opening 20 in the reflector 12, and a deflector 24 to prevent direct cooling of the lamp 14. A thermostat 21 controls the fan 15. The shutter unit 17, containing a roller curtain 65, is provided so that the lamp 14 need not be switched off between successive exposures, thus obviating the delay while the lamp 14 reaches its operating temperature.
Patent GB-1174576-A (GB)
Title: Improvements relating to Methods of Joining Metal in Lead Acid Secondary Electric Batteries
Inventor: EVANS JAMES ARTHUR
IPC: H01M50/54
Filed: 1965-12-24
Abstract: 1,174,576. Welding by pressure. ELECTRIC POWER STORAGE Ltd. 22 Dec., 1966 [24 Dec., 1965], No. 54878/65. Heading B3R. [Also in Division H1] In connecting a metal terminal pillar to a plate grid formed of dispersion strengthened lead for a lead acid secondary electric battery, a joint between the grid and the pillar or between the grid and a metal member which is itself secured to the pillar is effected by cold welding. A grid 10, Fig. 1, formed by extrusion and rolling from dispersion strengthened lead has an integral lug 11 with a tapered end 13 and this end 13 is lapped over a strip of lead alloy 12 also having a tapered end 14 in a die 15. A punch 16 having a working face 17 with semicircular ends and rounded edges is applied to the ends 12, 14 at a pressure of 12,200 p.s.i. to weld them together with 50% reduction. The bulging edges of the joint may be sheared off. The strips of a number of grids are then secured to a pillar by burning. In another embodiment, a number of dispersion strengthened lead grids 20 have integral lugs 21, Fig. 3, and these lugs are arranged in grooves 22 in a lead or lead alloy pillar 23 formed with an integral terminal and the pillar is compressed in a press to cold weld the lugs in the grooves. The materials to which the dispersion strengthened lead is cold welded may be a lead alloy containing tin and selenium or tin, calcium and silver or tin and calcium or it may be pure lead.
Patent GB-1353220-A (GB)
Title: Tow target
IPC: F41J9/10
Filed: 1971-11-26
Abstract: 1353220 Aerial target SUSQUEHANNA CORP 26 Nov 1971 [14 Dec 1970] 54951/71 Headings B7W and B7G A target to be towed by an aircraft comprises two wings 14 and a vertical fin 16, the wings being joined so as to form a channel in which the fin is installable. The wings and fin are of foamed plastics material and each wing is formed with a channel 20 of lightweight metal, the respective channels being bolted to a hinge 22 and arranged to form a further channel in which the fin 16 is held by bolts 26. The wings and the fin are formed with a light rigid tube 18 in their leading edges. A forward landing assembly 41 includes a skid 47 carried by shock absorbers 42 and an arm 43 connected to nose ballast assembly 34, while each wing carries a rear landing assembly 51 consisting of a skid 56 borne by a cantilever arm 52 fixed in a mount (53) attached to either a channel (55), Fig. 7 (not shown), or a plate (54), Fig. 8 (not shown) fixed in the wing during manufacture.
Patent GB-1450106-A (GB)
Title: Pressure vessel closures
IPC: G21C13/02
Filed: 1973-11-30
Abstract: 1450106 Hydraulically operated fastenings BABCOCK & WILCOX Ltd 30 Nov 1973 [30 Nov 1972] 55667/73 Heading E2A [Also in Division F2] A vessel used for example to enclose a nuclear reactor comprises a body portion and a lid portion, one portion being provided with members that each project through an opening in the other portion, each member including one or more elements that are moveable between an extended condition in which movement of the lid away from its closed position is prevented and a retracted condition which allows such movement, these movements of the lid being effected in a direction longitudinally of the projecting members. As shown a plurality of pins 9 equally spaced around a coping beam C which forms the upper edge of vessel F are positioned vertically using the pivoting movement allowed by the bearing surfaces of washers 8, 4 and then locked in that position by ring 5. Rings R are adjusted in height on the pins G so that they are all on the same level. To install the lid, sleeves 31 closed at their upper ends and slidably mounted on the upper ends of the pins are simultaneously supplied with compressed air, through holes 36 drilled axially through the pins, forcing the sleeves upwards against springs 35 compressed between fixed rings 30 on the pins and flanges 33 on the sleeves. This action uncovers the upper ends of elements A, three of which are hinged to a tapered portion of each pin at point 19, so that springs 26 can push them into their retracted positions Fig. 2 (right hand part) wherein their overall diameter is less than the minimum diameter of the holes 12 in the circular flange beam P and of the holes in washers 13, 14 enclosed in a collar 15 welded to the flange P. The lid is then lowered vertically, aligning its holes on the pins, until it rests on rings R. The air supply to the sleeves is cut off enabling them to be retracted by springs 35 thus extending elements A Fig. 2 (left hand part) so that their bottom edges have an overall diameter greater than the holes in the flange and in washers 13, 14. If the lid is accidently raised eg. by internal over-pressure, its movement is stopped when washer 14 contacts the edges of latches A any uneveness in contact being taken up by washers 14 pivoting freely on the surfaces of washers 13. Sealing between the lid and the body of the vessel is by sealing rings T which are inflated shown by chain dotted lines when the lid is in place and seal the space between skirt J of the lid and the vessel wall F. The lid may be rapidly removed by deflating sealing rings T; supplying compressed air simultaneously to sleeves 31 which then move to elements A against the pins Fig. 2 (right hand side) allowing the lid to be lifted vertically away from the vessel. The two inflatable sealing rings are located one above the other in channel members bolted to the face F. When deflated as shown by full lines the rings return to their original moulded forms the cross sections of which have re-entrant profiles that enable them to disengage rapidly from the skirt so breaking the seal.
Patent GB-1167138-A (GB)
Title: Method for Preventing Growth of Metallic Whiskers.
IPC: C25D5/18
Filed: 1966-12-13
Abstract: 1,167,138. Electro-plating with tin. NORTHERN ELECTRIC CO. Ltd. Dec.13, 1966 [Jan.12, 1966], No.55800/66. Heading C7B. In a method of providing small electrical components with a thin electro-plated coating of tin, the plating conditions are controlled so as to inhibit absorption of hydrogen in the structure of the plating metal during the process of electroplating, and thereby prevent the spontaneous growth of whiskers on the coating of tin. To inhibit hydrogen absorption the plating solution may be agitated with ultrasonic energy during electro-plating or the polarity of the electrodes may be alternated during plating, e.g. to give phases of 7 secs. plating and 1 sec. deplating.
Patent GB-1147003-A (GB)
Title: Improvements relating to photometric apparatus
IPC: G01J1/42
Filed: 1966-12-13
Abstract: 1,147,003. Photo-metric apparatus. INTERNATIONAL POLAROID CORP. Dec.13, 1966 [Dec. 27, 1965], No. 55843/66.. Heading G1P. [Also in Division G2] Photo-metric apparatus, which may be used in or with a camera, contains a means for selecting a photo-metric value and an indicator system providing a positive signal when the selected value corresponds with that of the brightness of the field of illumination viewed and no signal when no correspondence is obtained. Light from the field viewed enters via aperture 54 Fig. 1, passes through variable density filter 60 and strikes photo-conductor 44. When the correct stop is selected on scale 64, the filter 60 allows sufficient light to reach photo-conductor 44 so that its resistance is such that transistors Q1 and Q2 switch so that lamp 20 is illuminated and an affirmative signal appears on the half-silvered mirror 76 in the view-finder 74. When the incorrect stop is selected on scale 64, no signal is obtained. The embodiment illustrated assumes a fixed film speed and a fixed shutter speed. Figs.2, 3 and 4 (not shown) illustrate alternative circuits. The apparatus may be coupled to a camera diaphragm via rack 70 and pinion 72, or to a variable speed shutter or to a shutter and a diaphragm. The disc filter 60 may be replaced by a linearly movable filter or optical wedge or by a diaphragm, or the variable filter may be dispensed with altogether and a potentiometer inserted in the circuit and used to vary the apportionment of voltage. Figure 2 chows a circuit involving a transducer e. g. earphones to give an audible instead of a visual signal.
Patent GB-1260657-A (GB)
Title: Improvements relating to mountings for rectifier devices
Inventor: HAYWARD JOHN MCLAREN
IPC: H01L23/48
Filed: 1968-11-26
Abstract: 1,260,657. Semi-conductor devices. WESTINGHOUSE BRAKE & SIGNAL CO. Ltd. 31 Oct., 1969 [26 Nov., 1968], No. 55964/68. Heading H1K. A mounting for a rectifier device 10 comprises a leaf spring 1 deflected by tensioning means such as nuts and bolts 6, 7 to produce a predetermined pressure at a point along its length where it bears on the convex surface of an electrically insulating block 5 bearing on the rectifier 10 and clamping it on to the surface of a finned heat sink 14 through which the bolts pass. A contact-piece 11 is clamped in with the rectifier against its surface opposite the cooling fins to allow electrical contact to be made to this surface, the bolts being provided with insulating sleeves 4, 8, to prevent them shorting the device. Correct alignment is ensured by providing locating pips or holes on the contact-piece 11, the block 5 and the device 10. The pressure of the spring is gauged during assembly by measurement of the deflection by feeler gauges. A mounting with two heat sinks is described, Fig. 4, not shown, wherein the contact-piece 11 is replaced by a further finned heat sink.
Patent GB-1212368-A (GB)
Title: Substituted s-triazines
Inventor: HEIMBERGER WERNER
IPC: C07D267/20
Filed: 1967-12-18
Abstract: 1,212,368. Substituted s-triazines. DEUTSCHE GOLD - UND SILBER - SCHEIDEANSTALT. 18 Dec., 1967 [17 Dec., 1966], No. 57321/67. Addition to 1,070,636. Heading C2C. Salts of organic or inorganic acids and the substituted s-triazines of general formula where X represents the group -CCl 3 , -CHCl 2  or -CH 2 Cl, R<SP>1</SP> and R<SP>2</SP> independently represent a piperazino, piperidino or morpholino radical attached to the triazine ring through a nitrogen atom, the piperazine radical optionally being substituted on its second nitrogen atom by a linear or branched alkylol or alkyl group with 1 to 4 carbon atoms or by a phenyl group optionally substituted by one or more alkyl groups with 1 to 4 carbon atoms, nitro groups or halogen atoms, or R<SP>1</SP> and/or R<SP>2</SP> may alternatively represent the group in which R<SP>3</SP> represents an alkyl radical with 1 to 6 carbon atoms or a hydrogen atom, and R<SP>4</SP> represents an alkylene radical with 1 to 6 carbon atoms, are prepared by reacting the substituted s-triazine with a suitable acid e.g. sulphuric acid, phosphoric acid, hydrohalic acids, sulphonic acids, maleic acid, tartaric acid, citric acid, salicylic acid. The following salts are exemplified:-2 - trichloromethyl - 4 - piperazino - 6 - ethanolamino - s - triazine hydrochloride, 2 - trichloromethyl - 4 - N<SP>1</SP> - methylpiperazino - 6 - ethanolamino - s - triazine hydrochloride, 2 - trichloromethyl - 4 - piperazino - 6 - (2<SP>1 </SP>- hydroxy - n - propylamino-) - striazine hydrochloride. In the first two cases, the starting material triazine compound is itself prepared from the corresponding 2,6 - bis - trichloromethyl - 4 - piperazino - s - triazine (or the 4 - N<SP>1</SP> - methylpiperazino compound) by refluxing with ethanolamine.
Patent GB-1269320-A (GB)
Title: Container loading device
Inventor: TREBBIEN ALLEN R
IPC: G03G15/10
Filed: 1970-12-02
Abstract: 1,269,320. Packaging. ING C. OLIVETTI & C. S.p.A. 2 Dec., 1970 [30 Jan., 1970], No. 57346/70. Heading B8C. [Also in Division G2] When a container 7 is absent from a cradle 2 an L-shaped member 4 is held in the dotted line position by a spring 20. When a container 7 is inserted into cradle 2 it pushes a leg 4b of member 4 out of the way, which causes leg 4a to pivot downwards whereby a pointed tube 11 attached thereto punctures a seal 29 on container 7. Container 7, which is preferably of polyethylene having a metallic foil seal 29, is intended for use in replenishing liquid developer in electrophotographic copiers. Thus tube 11 is connected via a tube 18 to a pump (not shown) which forces developer through a tube 17 to a developer tank (not shown). Tube 11 may be connected to tubes 17, 18 via a solenoid valve 14 which is periodically operated according to the length of copy paper fed.