baber/WOPTO huggingface dataset:
Patent GB-1288966-A (GB)
IPC: G11C16/04
Filed: 1969-12-05
Abstract: 1288966 FET storage cell RCA CORPORATION 5 Dec 1969 [5 Dec 1968] 59501/69 Heading H3T A binary storage device uses a single FET of the type (such as MNOS) exhibiting two selectable threshold voltages which are respectively selected by application of a gate-source bias of an appropriate magnitude and polarity, reading of the stored state being effected by applying a gate source voltage having a value bteween the threshold values and by determining the resultant state of conductivity of the drain source path. The adjustable threshold effect is related to the capacitance between the gate (26, Fig. 1, not shown) and the substrate, source and drain regions (12, 15, 16), the di-electric being the oxide layer (22) and the nitride layer (24). This capacitance exhibits a hysteresis relation (Fig. 2, not shown) with the gate voltage, one level of capacitance producing one threshold voltage and the other level the other threshold. In this example the FET is an N-channel depletion type, but other types are mentioned. To write one state (Fig. 5, not shown) a 22À5 V. pulse applied to the gate (A) of an N channel enhancement type, will set its threshold to a higher level such as + 10 V. To write the other state a 22À5 V. pulse applied to the source will set its threshold to a lower level such as + 4 V. Thus a read pulse of + 5 V. will produce conduction or non-conduction according to which threshold is set. The power supplies may be pulsed, or half- or full-wave rectified A.C.
Patent GB-1290032-A (GB)
IPC: G01T5/10
Filed: 1970-11-20
Abstract: 1290032 Manganese doped silver halides AGFA-GEVAERT AG 20 Nov 1970 [21 Nov 1969] 55270/70 Heading C1A [Also in Division G6] A silver halide crystal doped with manganese ions is used as a detector and to record the tracks of ionizing particles. The manganese is preferably present in an amount of from 500 to 1500 p.p.m. based on the weight of silver halide. The Mn may be present in the tetravalent form. The preferred halide is silver halide. The doped crystal may be prepared by adding a solution of MnCl 2  to pure AgCl powder such that the product contains 1000 p.p.m. of Mn. The doped AgCl is then melted and introduced between two heated glass plates held apart by spacers. Cooling produced a polycrystalline sample which could be rendered monocrystalline by heating under pressure in an atmosphere inert to the sample, e.g. Cl 2 +N 2 . After exposure to ionizing radiation, the crystal is exposed to a high pressure xenon lamp fitted with a filter to restrict the wavelength of the emitted radiation. Alternatively the irradiated detector may be exposed to pulses of short wave light whilst a synchronously pulsed electric field is applied to the detector. Either of these treatments causes amplification of the damage track and render it available for study.
Patent GB-1295377-A (GB)
IPC: B32B15/08
Filed: 1970-11-27
Abstract: 1295377 Laminates NITTO ELECTRIC INDUSTRIAL CO Ltd 27 Nov 1970 [28 Nov 1969 30 Jan 1970 (2)] 56440/70 Heading B5N [Also in Division H1] A laminate suitable for the protection of communication cables comprises a metallic foil, e.g. of copper, iron, steel, silver, gold, tin or aluminium, a first layer laminated on at least one side thereof comprising an ethylene/unsaturated carboxylic acid or anhydride copolymer, an ethylene/unsaturated carboxylic acid or anhydride/unsaturated carboxylic ester copolymer or an ionomer containing one of these copolymers as base and a second layer laminated on to the first layer comprising polyethylene, an ethylene/vinyl acetate copolymer, an ethylene/unsaturated earboxylic ester copolymer or a graft copolymer of polyethylene and an unsaturated carboxylic ester. The laminate may be made by separately melting and extruding the first and second polymer as two streams, introducing the two streams into a single die, thereby forming a molten single stream and extruding the said single stream from said die to make a multi-layer film which is then bonded to the metallic foil by pressure at an elevated temperature. At least one surface of the multilayer film may be subjected to a surface treatment, e.g. corona discharge, flame treatment or chemical treatment. Suitable carboxylic acids or anhydrides are unsaturated aliphatic carboxylic acid or anhydrides containing 2 to 12 atoms (other than the carbon atoms contained in the carboxyl group), e.g. acrylic acid, methacrylic acid, itaconic acid or maleic anhydride. The esters employed are preferably ethyl, propyl, or butyl esters of the above acids.
Patent GB-1303813-A (GB)
IPC: F16F15/36
Filed: 1969-05-22
Abstract: 1303813 Vibration dampers ASSOCIATED ENG Ltd 22 May 1970 [22 May 1969] 26068/69 Heading F2S A crank-shaft (not shown) is combined with a torsional vibration damper consisting of an annular housing 13 containing particulate solid material, e.g. balls or powder 14, and possibly also a silicone fluid.
Patent GB-1309631-A (GB)
Title: Electric motors or generators
IPC: F02B75/02
Filed: 1969-01-10
Abstract: 1309631 Reciprocating motors and generators; cooling dynamo-electric machines CENTRAL ELECTRICITY GENERATING BOARD 9 April 1970 [10 Jan 1969] 1686/69 Heading H2A An A.C. motor or generator comprises a conductor mounted for reciprocating movement in a direction transversely of a linear dimension of the conductor and means for producing a field transversely of the direction of reciprocation and of the linear dimension of the conductor. Preferably the field is produced by a superconducting coil and the conductor is of superconducting material. Fig. 2 shows a three phase machine in which three armatures 21-23 reciprocate in appropriate phase relationship in a toroidal field winding 20 of rectangular cross-section, the armatures, extending along the broader dimension of the toroid and preferably consisting of a number of parallel conductors connected in series, the connections between the conductors and to an external circuit being effected outside the toroid. The latter connections may be made by springs, pivoted levers, Fig 10 (not shown), or by inductive coupling means. The armatures are coupled by connecting rods 35 to a crankshaft 37 or a multi-humped cam-track, Figs. 7-9 (not shown). Liquid helium may be circulated through the toroid or it may be evacuated and a cryostatic envelope provided. In the latter case internal channels for the cooling fluid may be provided in the armature conductors. A type II superconducting material is preferably used for both the field winding and the armature and has a backing of copper or aluminium. Fig. 5 shows a modification in which two concentric toroids 30, 31 are provided and each connecting rod carries two armatures 32, 33 located in the two toroids respectively. The flux B is oppositely directed in the toroids so that connections may be effected between adjacent ends of conductors in the two armatures. Alternatively six armatures may be provided around a single toroid, diametrically opposite armatures being electrically interconnected to form each phase. Toroids of polygonal shape may be employed so that the armatures can be flat and oscillate in a uniform field. Internal and external combustion engines are referred to as suitable for driving the machine as a generator.
Patent GB-1313492-A (GB)
Title: Internal combustion engine crankshafts
IPC: F02B75/22
Filed: 1969-04-25
Abstract: 1313492 Making crank-shafts PERKINS ENGINES Ltd 23 April 1970 [25 April 1969] 47065/72 Divided out of 1313491 Heading B3A [Also in Division F2] A crank-shaft has balance weights attached to web portions thereof, the weights comprising primary balance weights welded to respective web portions the weights having side faces permitting radial access to adjacent journals or crankpins, and secondary balance weights detachably secured to side faces of the primary weights. The crank-shaft is made by forming and completely machining a crank-shaft body, welding the primary balance weights of the web portions, subjecting its bearing portions to finishing treatment and attaching the secondary balance weights. The crank-shaft and the method making it are disclosed in Specification 1,313,491.
Patent GB-1314454-A (GB)
Title: Pattern-controlled machine tools
IPC: B23Q5/36
Filed: 1970-06-25
Abstract: 1314454 Copy-milling PRECISION GRINDING Ltd 22 Sept 1971 [25 June 1970] 30789/70 Addition to 1069481 Headings B3B and B3K A pattern-controlled copying machine comprises a manually-controlled linkage 16-26 for moving a stylus and tool carried by a head 14a in three mutually perpendicular directions. The fore-and-aft movements of head 14 can be provided by the linkage, or when making a heavy cut, by a fluid-pressure cylinder 26, actuated by a twist-grip 29.
Patent GB-1324082-A (GB)
Title: Diazotype recording process and material used therein
IPC: C09B44/12
Filed: 1969-12-30
Abstract: 1324082 Diazotype materials and processes AGFA GEVAERT 10 Nov 1970 [30 Dec 1969] 63326/69 Heading G2C The coupler used in a one- or twocomponent diazotype process is a quaternary thiazolium salt of formula wherein R 1  is a substituted cycloalkyl, substituted aralkyl, alkyl, cycloalkyl, allyl, aralkyl or substituted alkyl group, R 2  and R 3  are hydrogen, alkyl, substituted alkyl, aryl, substituted aryl at least one R 2  and R 3  being other than hydrogen and X is an anion but is absent if R 1  contains an anion. The diazotype material for use in the process may contain, besides a diazonium salt and optionally the coupler specified above, urea, silica, allyl isothiocyanate, boric, phosphoric, ascorbic, tribromo- or trichloroacetic acid and gelatine. R 1  in the thiazolium salt may also be-A-CO-O-B-SO 2 - M wherein A is methylene or p-tolylene, B is -(CH 2 ) n  where n is 1 to 4 and M is hydrogen, an anion group or a metal atom or -B-W-NU-V-B 1  wherein B is as above, B 1  is alkyl, amino, substituted amino or H when V is a single bond, W and V and carbonyl or sulphonyl or a single bond but at least one is sulphonyl. The material may be heat developed if it contains an alkali-generator such as urea.
Patent GB-1326071-A (GB)
Title: Section insulators for use in overhead conductors and electrical  traction systems
IPC: B60M1/18
Filed: 1971-04-19
Abstract: 1326071 Section insulator BRITISH INSULATED CALLENDERS CONSTRUCTION CO Ltd 19 April 1971 [17 Feb 1970] 7537/70 Heading H2C An insulating runner comprises at least one elongate inner body 1 of resin bonded glass or other fibre, metal end-fittings (2) (Fig. 2, not shown) on the inner body, and an outer body 3 of a resin composition at least partly enclosing the inner body between the end-fittings and carrying a plurality of ceramic or vitreous inserts 4. In Fig. 1 the outer body is cylindrical and is cast from cycloaliphatic epoxy resin together with hydrophthalic anhydride, as a hardener, stannous octoate, as an accelerator, and silica flour, as a filler. A longitudinal row of ceramic shell inserts 4 of semi-circular section are embedded in and interlocked by sawtooth projections 5 with the resin body. The shells are angled at about 45 degrees to the axis of the runner so they overlap longitudinally (Fig. 3, not shown), and the edges of the shells are chamfered. An alternative cross-section is shown in Fig. 4 in which the transverse dimension parallel to the running surface is greater than the dimension perpendicular to it, and the sawtooth projections are replaced by dovetails 7.
Patent GB-1328801-A (GB)
Title: Formation of dyes suited for reproduction purposes
IPC: C09B44/20
Filed: 1970-11-10
Abstract: 1328801 Benzothiazolium salt AGFAGEVAERT 10 Nov 1970 [3 Dec 1969] 59093/69  Heading C2C [Also in Division G2] 2 - methyl - 3 - N - (methylsulphonyl) - carbamylmethyl-5,6-dimethoxy benzothiarolium bromide of formula is prepared by heating 2-methyl-5,6-dimethoxy benzothiazole and N-(bromoacetyl)-methanesulphonamide. Reference has been directed by the Comptroller to Specification 1,252,751.
Patent GB-1329002-A (GB)
Title: Microwave oscillator circuit including a bulk-effect negative- resistance device
IPC: H03B9/14
Filed: 1970-09-03
Abstract: 1329002 Bulk effect oscillators VARIAN ASSOCIATES 3 Sept 1970 42309/70 Heading H3T [Also in Division H1] A microwave oscillator has a pair of variable lumped capacitors 5, 6 connected in shunt with and at opposite ends of a strip transmission line 7 to define a half wavelength resonator 3 open circuited at its ends and tuned to a fundamental mode of resonance at the operating frequency of the oscillator and a bulk effect device 14 connected in shunt with and at a point intermediate the length of the line 7 near the voltage null of said resonator for the fundamental mode of resonance for matching the impedance of the device 14 to the impedance of the resonator 3. The product of capacitance and self inductance (C 1 L 1  or C 2 L 2  Fig. 2, not shown), of the capacitors 5, 6 at the second harmonic of the operating frequency of the oscillator is greater at one end than the other end of the line 7 so as to position one of the voltage nulls of the second harmonic nearer than the other to the position of the device 14 such that during operation the total electric field between the terminals of the device causes the current in the device to be substantially a square wave at the fundamental operating frequency. The strip line 7 is formed of silver plated copper strips 9, 12 separated by a gold plated tungsten mesh screen 13 and supported by thermally conductive electrically insulative tabs 11, such as of beryllia. A silver plated copper capacitive loading ridge 15 supplies pulsed bias from conductor 18 to the bulk effect device 14, such as GaAs Gunn diode, via a strip of solder foil (17, Fig. 5, not shown), or a tellurium copper stud (16, Fig. 6, not shown). The foil (17) or stud 16 and slabs 11 provide heat sintering for the diode 14. Capacitive ridge 15 reduces the surge impedance of the line 7 to prevent avalanche current flowing when oscillations first begin and facilitates starting at the fundamental frequency. The amplitude of the second harmonic voltage must be sufficient to combine with the fundamental voltage wave so that the total electric field across the diode 14 is above the threshold for microwave oscillation for a first half cycle and then slightly below this threshold to delay domain formation during a second half cycle of fundamental frequency. Also the total voltage of the fundamental and second harmonic should be arranged to be less than the avalanche voltage so as to avoid failure of the device. A pair of lumped trimmer capacitors 23, 24 similar to trimmers 5, 6 are tuned to the fundamental to provide output via coaxial line 26, 27 but are detuned with regard to the second harmonic to reduce the coupling of the second harmonic to the load. To increase the output power of the oscillator a plurality of Gunn effect diodes can be connected in parallel. Preferably the diodes have a transit time mode frequency of operation within 30% of the operating frequency of the oscillator. U.S.A. Specification 3,416,099 is referred to.
Patent GB-1329045-A (GB)
Title: Connecting device for a printed circuit board
IPC: H01R12/50
Filed: 1971-08-02
Abstract: 1329045 Two-part couplings MERLIN GERIN 2 Aug 1971 [10 Aug 1970] 36177/71 Heading H2E An edge connector for a panel or circuit board 10 comprises sockets 18 and further comprises a series of respective screw clamping terminals for receiving leads 33. In the embodiment of Fig. 4 a screw 36 co-operating with a fixed square nut 38 causes a clamping plate 40 to move thereby clamping the lead 33 inserted in a hole in the lug 42 of the plate 40 against the connector body . The plate 40 is in two parts 47, 49 which are electrically insulated from each other, the part 49 being electrically connected to the socket 18. The insertion of a conducting screw 50 completes a conducting path between parts 47, 49 and thereby interconnects the socket 18 and the lead 33. In the embodiment of Fig. 6, the insertion of a jack plug having an insulated tip 64 breaks a conducting path between lead 33 and socket 18 and connects the socket 18 to a lead carried by the plug. Such an arrangement may be used for test purposes. Several such edge connectors may be arranged side by side to form a composite connector for a plurality of circuit boards (Figs. 1 to 3 and 5, not shown). In addition each edge connector may have a series of subsidiary contacts (26, Figs. 1 and 2, not shown) for wires connecting contacts on the same, or adjacent boards by means of soldering, clipping or crimping. Channels (56, Fig. 5, not shown) may be formed between adjacent edge connectors for receiving the external leads 33.
Patent GB-1329089-A (GB)
Title: Transfer printing processes
IPC: B44C1/16
Filed: 1969-09-24
Abstract: 1329089 Transfers ADHESIVE MATERIALS Ltd 18 Sept 1970 [24 Sept 1969] 47117/69 Heading B6C Printing characters mounted on one support surface for transfer to another support surface are each formed with a surrounding boundary area transferred with it and serving to position it with respect to other transferred characters so that spacing corresponding to that obtained with normal type characters may be achieved. In one embodiment, Fig. 2, a laminated sheet comprising a body material 1 such as transparent cellulose acetate, and a layer 2 of peelable adhesive, protected by a siliconized release paper is printed with characters 4 from a normal fount of type or from a block or screen made from the fount, which fount may include spacing elements. Cuts 5 are then made through the layers 1, 2 by means of a steel-rule cutter so that each character is enclosed in a rectangular area defined by the cuts 5 and corresponding to the type size. Each character can be detached and applied to another support surface, the cut edges 5 of adjacent characters abutting to give the correct spacing. As shown in Fig. 4, a laminate is used comprising an opaque layer 7 of black P.V.C. or paper, a layer 11 of peelable adhesive, and a release paper 13. The layers 7, 11 are cut not only along the lines defining te rectangular boundary of each character but also along the lines of the characters themselves. Each character is detached along the boundary lines for placement on another supporting surface. Subsequently the area surrounding the character or the character itself can be removed according to whether a positive image or a reverse image is required. In this embodiment, each character and its surrounding area may be printed in different colours. Further, a heat melt adhesive may be used, and there may be small joins between the edges of the characters and their surrounds so that after transfer the characters may be fixed by a heated stylus. Also, a gummed sheet may be used, and a wet brush used to attach the characters. An encapsulated adhesive may be employed. In the arrangement shown in Fig. 8, the characters comprising a layer of ink 15 or stove paint are sandwiched between a translucent silicone-treated mounting sheet 17 and a layer of pressure-sensitive adhesive 20. A further layer 19 of coloured lacquer or varnish defines a rectangular area enclosing each character. By application of pressure to the sheet 17 the layers 15, 19, 20 can be transferred to a surface. The colour of the lacquer is such that when the finished assembly of characters is photographed for reproduction, thd colour of the lacquer is not visible. However, for reverse printing, the  characters are printed in white and rectangular surround of varnish coloured with a colour which appears on the photographed image. The laminates containing the characters may  be made in reel form and the cutting may be effected by high-frequency current methods.
Patent GB-1330301-A (GB)
Title: Isotope container
IPC: G21F5/02
Filed: 1970-09-28
Abstract: 1330301 Shielded containers S G YOUNG 28 Sept 1970 [17 July 1969] 36090/79 Heading B4Q A shielded transport container for a radioactive source includes an unsegmented solid lead core 1 encased in an iron shield 2, with a blind hole 6 in the core for accommodating a source holder 10 which is withdrawable through an aligned opening 4 in the shield, which opening is provided with a connector 11 for a screw-on closure cap (Fig. 2, not shown) which, when in place prevents access to a lateral safety screw 13 locking the source holder in the hole by engagement in a recess or groove 14 of the holder. The container may be employed as an exposure container when associated with a separate withdrawal mechanism which may be secured to the shield by a mounting case 19, and removal of which while the source holder is in a withdrawable condition is prevented by the engagement of the screw 13 in a socket 21 of the casing 19 whenever the screw is withdrawn to permit movement of the source holder.
Patent GB-1335407-A (GB)
Title: Compressor or evacuator
IPC: F04B45/02
Filed: 1971-05-14
Abstract: 1335407 Reciprocating compressors and capacitors METAL BELLOWS CORP 14 May 1971 15114/71 Heading F1N [Also in Division F2] A compressor or evacuator comprises a bellows 10 formed from a stock of identical annular stainless steel diaphragms welded together alternately at their inner and outer edges, the ends of the bellows being secured, respectively, to a reciprocable connecting rod 16 and a plate 32 containing a valve assembly 48, 46, 52 (See Division F2). The plate 32 includes a cylindrical portion 32c which fills the interior of the bellows when in its fully contracted position with adjacent diaphragms lying flush against one another. The rod 16 is reciprocated by an eccentric 104 driven by an electric motor 22 and balanced by a stock of bad washers 110 disposed between a screw 108 and a cover 114. Details of the way the bellows is manufactured are provided.
Patent GB-1340329-A (GB)
Title: Cushion foams
IPC: C08G18/48
Filed: 1970-02-24
Abstract: 1340329 Flexible polyurethane foams UNITED KINGDOM ATOMIC ENERGY AUTHORITY 19 April 1971 [24 Feb 1970] 8913/70 Heading C3R Flexible polyurethane foams are prepared by reacting a mixture comprising at least two polyether triols having differing molecular weights, the triol of lower M.W. having a maximum M.W. of 1700, a cyclic polyisocyanate composition comprising a cyclic polyisocyanate component amounting to at least 85% by weight of the composition and having two aromatic rings and two isocyanate groups per mol. of component, water, a catalyst to promote the isocyanate-water reaction, a catalyst to promote the isocyanate-triol reaction and a foamstabilizing agent. The triols are most preferably prepared by reacting propylene oxide with hexane triol and the mixture thereof suitably has a minimum average M.W. of 1200. The preferred cyclic polyisocyanate component is diphenylmethane diisocyanate which may be mixed with at least one cyclic polyisocyanate of higher frictionality. Tertiary amine and organometallic catalysts are used and the foam stabilizing agent is preferably a polydimethylsiloxanepolyoxyalkylene copolymer.