baber/WOPTO huggingface dataset:
Patent GB-1242205-A (GB)
Title: Methods of co-ordinating a plurality of audio frequency signal transmitting stations in an electric power supply network
IPC: H04B3/54
Filed: 1970-01-21
Abstract: 1,242,205. Signalling over power lines. LANDIS & GYR A.G. 21 Jan., 1970 [28 Jan., 1969], No. 2983/70. Heading H4R. Transmitting stations of audio-frequency signals, used for indication or control purposes, superimposed on a power supply network are co-ordinated by frequency dividing the supply voltage to produce a subharmonic of a pilot voltage at a central station and distributing it to each transmitting station where the pilot voltage is formed from the subharmonic and the audio-frequency signals are derived from the pilot voltage. As shown, the central station 1 has an input 3 at supply frequency fn which is converted in frequency divider 4 into a voltage at frequency fs which is a subharmonic of both the supply voltage and a pilot voltage. This voltage is used to amplitude modulate at 5 a carrier frequency voltage generated in oscillator 6 and this modulated voltage is transmitted after amplification at 7, 8 along individual paths 9 to transmitting stations 2. On receipt of the modulated voltage it is filtered and demodulated at 10, 11 respectively to reproduce the subharmonic voltage. From this voltage the pilot voltage is produced in frequency multiplier 13 and supplied to an audio frequency transmitter which superimposes a signal on the power network to provide the required indication or control. Any phase difference which occurs due to the length of a particular transmission path is corrected by comparison with the phase of the supply voltage.
Patent GB-1115273-A (GB)
Title: Building material laminate
IPC: B32B21/00
Filed: 1966-01-21
Abstract: 1,115,273. Laminates and laminating. JOHNS-MANVILLE CORPORATION. 21 Jan., 1966 [24 Feb., 1965], No. 3036/66. Heading B5N. A weather-resistant building material comprises a laminate of a cellulosic sheet, e.g. plywood or board lumber, and an asbestos paper adhered to each other by a waterinsoluble adhesive, the asbestos paper containing a water-insoluble binder and defining a weather resistant exterior face of the building material. As described the cellulosic sheet is a five-layer plywood and has the asbestos paper adhered to one face by a vinyl modified phenolic thermosetting glue sold under the name " Duro-Lok " (Registered Trade Mark). The asbestos paper weighs at least 4 lb per 100 sq. ft. and is at least 10 mils thick. It contains at least 4% by weight of a binder such as polyvinyl chloride, vinyl chloride, or vinylidene chloride, and has a porosity such that the time for 100 c.c. of air to pass through the thickness of the paper, as measured by TAPPI Test T-460 M49 is at least 200 secs. The paper, which may be embossed, is abrasion, fire, and weather resistant. In apparatus for making the laminate, Fig. 5, asbestos paper 34 is coated with adhesive by a roller 44 before coming into contact with a cellulosic sheet 42 on a conveyer belt 40. The assembly then passes between pressure rolls 50 and beneath a heater 54 to cure and set the adhesive.
Patent GB-815605-A (GB)
Title: Improvements in apparatus for recording data
Inventor: BIKALY LAJOS
IPC: G06K1/12
Filed: 1956-07-29
Abstract: 815,605. Selective printing. INDUSTRIAL ACCOUNTANCY PARTNERSHIP Ltd. Oct. 29, 1957 [July 29, 1956], No. 3048/56. Addition to 747,812. Class 100(4) A data recording apparatus as claimed. in the parent Specification in which one record is made by printing and a second record is made by paper punches, wherein the second record instead of being made by the punching of holes is marked by further printing or by the formation of magnetic spots. As shown in Fig. 1, each of a row of vertically reciprocable type-bars 15 has at its lower end, a resiliently mounted type-rod 400 which is connected to a cross pin 180 which slides in a slot 183 provided in the impression operating frame 181. Impression may be effected through an ink ribbon 403 on to the tape 29, by the interaction of two or more chemically treated papers, or by a holder carrying a graphite rod wax marking pencil which directly marks the tape. In a further modification, Fig. 3, markings on the tape are effected by the energization of an electromagnet 415 which causes a pole piece 411 to mark a magnetic tape. A spring 414 returns the pole piece 411 after operation.
Patent GB-510024-A (GB)
Title: Lubricating systems
IPC: F01M5/04
Filed: 1938-02-01
Abstract: 510,024. Lubricating. WORTH, W. Feb. 1, 1938, No. 3111. Convention date, Feb. 11, 1937. [Class 12 (iii)] When starting up a lubricated mechanism from cold, only a part of the lubricant store is circulated in the lubricating system, said part being diluted by a liquid to reduce its viscosity. As shown, an internal-combustion engine 12 has an oil supply pump 10 and an oil scavenging pump 16, a cooler 18 with an automatically actuated valve 20 being included in the lubricant circuit to keep the lubricant at constant viscosity. The main oil reservoir 14 has a compartment comprising a vertical tube 76 open above and below to the reservoir 14. The oil inlet 46 is tangential to the sides of the tube 76 so that the lubricant entering the tube is given a rotating motion to separate any air from the oil. The bottom portion of the tube has vanes 84 to stop the rotating movement of the oil before the latter reaches the outlet 80 which is located above the lower end of the tube 76. The oil lead from the reservoir has a drain cock 72 and is connected at 60 by a pipe 48 communicating at 50 with the source of engine fuel supply. A valve 62 which normally blocks the pipe 48 can be opened by pressing on a button 68. In operation, the valve 62 is opened a few minutes before it is desired to stop the engine 12 so that oil fuel is drawn into the lubricating system. As the system includes the tube 76 oil fuel does not mix with the main body of lubricant in the reservoir 14. The engine can thus be easily started up again when cold as the lubricating fluid in the lubricating system is quite fluid due to the presence of oil fuel. As the engine warms up the oil fuel content vaporizes and separates out from the lubricating oil, this loss being made up by some of the oil in the reservoir 14 passing into the tube 76 and so into circulation. Further, during normal running only a comparatively small amount of lubricant is circulated, the wastage being made up by oil from the reservoir 14. The oil fuel pressure gauge 54 is fitted to the pipe 48, and this will give an indication of the amount of oil fuel passing into the lubricant system when the valve 62 is opened.
Patent GB-1259733-A (GB)
Title: Sheet receiver
IPC: B65H31/38
Filed: 1970-01-22
Abstract: 1,259,733. Sheet receivers. NORFIN Inc. 22 Jan., 1970 [24 Feb., 1969], No. 3187/70. Heading B8R. A sheet receiver having spaced shelves 5 each comprising a sheet stop 7 at one end is characterized by a vibratable jogger belt 8, disposed at the opposite ends of the shelves, or between the stops 7 and the opposite ends of the shelves for causing the sheets to engage the stops. The belt, which may be of resilient, flexible, elastic material, e.g. open cell neoprene, the cells being closed on the sheet-facing side, is connecetd via doubly pivoted link arms 18, 19 to a top rail 10 and bottom runner 11, a top belt bracket 15 being glued to the belt and pivotally connected to the link arm 18 which is pivotally located in slots 24 on a plate 23 adjustably positioned on the rail 10. A bottom belt bracket 16 is affixed to the belt by a "Velcro " (Registered Trade Mark) tape which facilitates tensioning and removal, the bracket being pivotally connected to the link arm 19 located in one of a series of slots 43 in a runner 11 by a foam pad 44. The forward edges of sheets fed on to the shelves abut the belt 8 which is thus vibrated and pushes the sheets back against the stops 7 which are set at an angle of less than 90 degrees to the shelves.
Patent GB-725428-A (GB)
Title: Improved power converting device or system
Filed: 1953-02-04
Abstract: 725,428. Generating arrangements. PESTARINI, J. M. Feb. 4, 1953 [Feb. 4, 1952], No. 3201/53. Class 38 (4). A constant frequency network L is supplied from a variable speed prime-mover 1, such as a water turbine, by plant comprising an alternator 2 driven by the prime-mover, a constant current D.C. generator 6, such as a metadyne machine, a rotary frequency converter 3 having a " stator " rotatable by a D.C. machine 4, and a rotary D.C. to A.C. converter 7 (preferably of the metadyne type) driven by a synchronous motor 5 having means whereby its running phase angle with reference to the network L may be adjusted. The last means may comprise a phase shifting transformer arranged between the network L and the A.C. winding of the motor, or, as shown, the motor may have two angularly displaced field systems separately and adjustably excited by D.C. generators 12, 13. Over a high-speed range of the primemover, the alternator 2 feeds the network over the converter 3, the output frequency of which is controlled by adjustment of the fields 8, 29 of the D.C. machines 4, 6, respectively. During this stage converter 7 is short circuited and isolated from the network. Over a lower speed range the alternator is isolated from the converter 3, and power is supplied to the network by the machine 6 over the converter 7, from which the short-circuit has now been removed and which is connected to the network. Instead of the machine 6 being directly driven by the prime-mover, it may be arranged to be driven by one or two synchronous motors alternatively from the network, or alternator. Variable ratio transformers may be interposed between the network and the converter 3.
Patent GB-1399424-A (GB)
Title: Method of preparing lightweight concrete
IPC: C04B28/02
Filed: 1973-01-22
Abstract: 1399424 Lightweight concrete NEDUCO INDUSTRIELE WONINGBOUW NV 22 Jan 1973 [26 Jan 1972] 3205/73 Heading C1H A lightweight concrete is prepared from cement, water, aggregates and additives by forming a first mixture from at least part of the water, an ionogenic surfactant, and cement  aggregate and mixing until at least 15% of air is entrained, then adding the remaining water and, if not added before, the aggregate, then plastic foam particles and untwisted fibre, mixing being continued until homogeneous. Foamed polystyrene flakes and fibres of polypropylene, glass, rock wool and nylon, and metal wire are specified. Surfactants are suphonates. The cement can be partially replaced by slag, flyash and quartz. Sand is the preferred aggregate.
Patent GB-501727-A (GB)
Title: Manufacture of imidazolinium salts
IPC: C07D233/10
Filed: 1937-07-29
Abstract: 501,727. Imidazolinium salts; foaming- agents. WALDMANN, E., and CHWALA, A. July 29, 1937, No. 3243/39. Addition to 479,491. Divided application of which a Specification was laid open to inspection under Sect. 91 of the Acts, Jan. 31, 1938. Samples furnished. [Classes 2 (iii) and 15 (ii)] Imidazolinium salts are prepared by heating to 200-250‹ C. a mixture of a fatty acid containing at least nine carbon atoms or a salt or ester thereof, an ethylene diamine or homologue thereof in which two hydrogen atoms respectively attached to both nitrogen atoms are replaced by aliphatic or araliphatic radicles and a salt of said diamine with a strong acid. In an example, 2-heptadecyl- 1 : 3-diethylolimidazoliniumchloride is prepared from lauric acid, N : N<1>-diethylotethylenediamine and the dihydrochloride of the latter. The product forms a foam with water. Samples have been furnished under Sect. 2 (5) of products prepared from N : N<1>-diethylol, N : N<1>-dimethyl and N : N<1>-dibenzyl-ethylenediamines by condensing in the presence of the dihydrochloride of these bases with stearic acid.
Patent GB-1416561-A (GB)
Title: Semiconductor arrangements and cooling means therefor
IPC: H01L23/34
Filed: 1973-01-22
Abstract: 1416561 Thyristor converters SIEMENS AG 22 Jan 1973 [22 Jan 1972] 3257/73 Heading H1K A converter circuit, e.g. for A.C.-D.C. or D.C.-A.C. comprises 12 controllable semiconductor thyristors respectively connected in three series pairs in one surge and three in the opposed sense between the unidirectional outputs, with the alternating phase conductors connected successively to the junction of the pairs. Component plates 15a 1 , 15 a2 ; 15b 1 , 15b 2  &c. (Figs. 1, 2) forming parts of corresponding assemblies have resilient springs 23 therebetween corresponding with the axially aligned semiconductive thyristor components 1, 2 in sandwich form gripped between outer contact plates 13, 14 in unitary arrangements. Thus the semiconductor components 1, 3, 5, 7, 9, 11 have terminals electrically commoned over plate 13 and semiconductor components 2, 4, 6, 8, 10, 12 have terminals commoned over contact plate 14. Insulant walls 22 separate the plates 13, 14 which are held together by rigid insulant clips 29. The resilient members 23 are covered by conductive coppered steel mesh shrouds to establish a resilient electrical connection between plates 15a 1 , 15a 1 ; 15b 1 , 15b 2 , &c., interconnected in adjacent pairs by elastic connecting members 21 while remaining thyristors are similarly inter-connected. The walls 22 define inner cooling channels through which insulant cooling liquid may pass in the sense of arrows 18. The contact plates may be finned and the coolant may circulate round the periphery of the individual units, which may comprise thirtysix thyristor units for frequency multiplications; one of the contact plates being insulatedly subdivided (Figs. 3a, 3b, 3c, not shown). The coolant circuit may be closed to permit boiling, or open to permit circulation. In a modification in which the semiconductor assembly is unitary with its A.C. feed source (Figs. 4a, 4b) a transformer 27 energizes a sequentially connected direct frequency changer, and its tank wall 14a serves as a thermal contact plate and a common neutral. Secondary connections 28 extend through insulant bushes 14d of the wall to thyristors 1, 2, &c. interposed between an outer contact plate 13 divided into insulated sections 13a, 13b, 13c providing the A.C. outputs; the tank wall 14a, and inner contact plates 15a 1 , 15a 2 , &c. being separated by the resilient member. The tank contains an oil coolant which flows through aperture 30 of the wall to surround and cool the thyristors, and sections 13a, 13b, 13c may have cooling fins 24 extending outwardly thereof. Alternatively the thyristor assembly (Fig. 4c) may be mounted on a separate contact plate 14 carried by wall 14a, arranged so that the assembly may be plugged into the A.C. source through an interposed insulant plate 14e by means of insulated sockets 31 in wall 14a engaging pins 32 of the thyristor assembly; a tube 33 of the latter engaging an aperture 30 of the transformer tanks, arranged to open only when the assembly is plugged in.
Patent GB-272807-A (GB)
Title: Improvements in locks for nuts and bolt heads
IPC: F16B39/26
Filed: 1927-02-04
Abstract: 272,807. Klafke, A. Feb. 4, 1927. Locking nuts.-A nut or bolt-head having an undercut annular groove d with conical surfaces f, g is associated with a washer g on which is an upturned collar, divided into sections c<1>, c<2>, constructed to enter the groove d. The nut may have a bevelled surface s which forces alternate sections c<2> into the bolt-threads, the sections c<4> being bevelled on the inside, and the shorter sections c<1> on the outside. The wall f of the groove d may be slotted to increase the pressure of the nut on the bolt. The washer has tongues t or punched-out projections for engaging the work. Slots e, Fig. 11, in the wall g of the groove are arranged non-symmetrically in respect of the sections c<1>, c<2> so that one of the sections may be forced into one slot. In a modification for rail bolts the washer is rectangular and is bent down at opposite sides r, Fig. 22, to enclose a helical spring washer u. The washer b has slots v and tongues m for holding the spring washer. In a further modification the washer has a single flange r, Fig. 17, reinforced bv ribs y which engages the flange of the rail and may be bent under it.
Patent GB-432579-A (GB)
Title: Improvements in and relating to clay and similar pipes, conduits and the like
IPC: B28B21/54
Filed: 1934-02-01
Abstract: 432,579. Clay pipes. SUTTON, W. M. W., Holywell, Burton Road, Ashby-de-la- Zouch, Leicestershire. Feb. 1, 1934, No. 3307. Drawings to Specification. [Class 99 (ii)] [See also Group V] Clay and similar single-piece pipes, conduits, and the like are formed with holes or slots in the thickness of the walls which preferably extend axially from one end of the pipe to the other, including the socket portion if provided. After the pipes are fired the holes may be filled with hard-setting material such as cement or concrete. The holes may be of segmental form, spaced around the pipe with relatively narrow solid divisions between them.
Patent GB-1125224-A (GB)
Title: Improvements in or relating to method for packing railway sleepers
IPC: E01B27/17
Filed: 1966-01-26
Abstract: 1,125,224. Packing sleepers. F. PLASSER. 26 Jan., 1966 [27 Jan., 1965]. No. 3444/66. Addition to 1,120,840. Heading E1G. Sleepers packed in, at least, pairs by a travelling packing machine are packed with at least two unpacked sleepers between them, subsequent advance of the machine by at least double the sleeper pitch is such that at least one of the sleepers being packed lies between two previously packed sleepers. The machine may have two or three packing mechanisms or comprise articulated packing machines.
Patent GB-1525729-A (GB)
Title: Circuit board for a planar flash array
IPC: G03B15/04
Filed: 1975-06-27
Abstract: 1525729 Circuit boards for planar flash-lamp arrays GENERAL ELECTRIC CO 27 June 1975 [3 July 1974] 03469/78 Divided out of 1525722 Heading G2X The connector tabs 18, 18<SP>1</SP> of a circuit board for a planar flash array have a protective terminal 31, 31<SP>1</SP> which, as the tab is inserted in a camera socket, shorts the socket contacts 37, 38 before they engage the connector terminals for the flashlamp circuitry. This prevents inadvertent firing of the lamps due to stray residual voltages across the socket contacts. The protective terminal may be electrically connected to or integral with one of the connector terminals and may also be electrically connected to a reflector for the flash array to provide a large stray capacitance to ground. In an alternative embodiment the protective terminal is T-shaped The flash sequencing circuitry is such that the group of lamps further from the tab are fired, while the group near the tab may be short circuited (Fig. 4).
Patent GB-342143-A (GB)
Title: Improvements in paper makers dryer felts
IPC: D21F1/00
Filed: 1930-02-01
Abstract: 342,143. Multiply woven fabrics. HINDLE, T., 23, Maple Avenue, Haslingden, Lancaster. Feb. 1, 1930, No. 3479. [Class 142 (iv).] A dryer felt whereby the wet web of paper is carried through and pressed against the drying- cylinder in paper-making machines has a working surface formed by face warps a of single or multiply worsted yarns, whilst the back warps b and the wefts c are of multiply cotton yarn. The warps a are preferably coarser than the warps b, their diameter multiplied by the number of threads per inch being greater than 1, so that they cover the cotton weft.
Patent GB-1489971-A (GB)
Title: Device for protection against flooding
IPC: G01M3/04
Filed: 1975-01-28
Abstract: 1489971 Dishwashers HUSQVARNA AB 28 Jan 1975 [1 Feb 1974] 3597/75 Heading A4F [Also in Divisions D1, G 1 and H1] A flood protection device is located in a machine to which liquid is fed and/or discharged via an electromagnetic valve 5, e.g. a washing machine or a dish-washing machine, and comprises a body of material 14 which resists the force of a switch actuator 12 when dry to cause a switch 10 connected in series with the valve 5 to be closed but which yields to the force of the switch actuator 12 when wet to cause the switch 10 to open and the valve 5 to close. In the embodiment described, the switch 10 comprises a micro-switch having a spring arm 12 which is normally biased to close the switch 10 by a member 14 of porous plastics or water soluble material. Any water leaking from the machine collects in a bottom plate 1 where the member 14 is positioned causing the latter to become wet and to be compressed by the spring force of the arm 12. The switch 10 is thereby opened causing the valve 5 to shut off the water supply to the machine. The electrical circuit of the machine also includes a programme mechanism 4, a circulation pump 6, a heating element 7 and a signalling device 8.
Patent GB-1072714-A (GB)
Title: Process for the production of laurin lactam
IPC: C07D201/04
Filed: 1965-01-27
Abstract: Lauryl lactam is produced by reacting cyclododecanone with a hydroxylamine salt solution and subjecting the oxime thus formed in the presence of concentrated H2SO4 or oleum to Beckmann re-arrangement, both reactions being carried out at above 70 DEG  C. in solution in a non-interfering, water-immiscible, cycloaliphatic solvent having a boiling-point such that it is not distilled off during the reactions, and such that lactam may be separated from it by distillation. The solvent may be excess cyclododecanone, cyclododecane, decalin, butyl cyclohexane, pentyl cyclohexane or isopropyl cyclohexane. The preparation may be carried out in two separate stages or as one stage by allowing the mixture to run down the walls of a heated reaction tube as a thin film.  Prior to distillation, the mixture may be diluted with water and the organic phase separated and washed with alkali.  The hydroxylamine salt may be a sulphate.
Patent GB-741221-A (GB)
Title: Improvements in or relating to color television apparatus
IPC: H04J1/00
Filed: 1951-02-15
Abstract: 741,221. Colour television. CHROMATIC TELEVISION LABORATORIES, Inc. Feb. 15, 1951 [March 20, 1950], No. 3646/51. Class 40(3). Relates to colour television receiving apparatus incorporating a cathode-ray tube 1 of the type described in Specification 721,199 in which a green phosphor 17 is deposited directly on the tube face 5 and is backed by a grating comprised of a first set of strips 19 coated on both faces with a red phosphor and a second set of strips 21 coated in both faces with a blue phosphor. If the two sets of strips are maintained at the same potential, the electron beam passes between the strips to impinge the green phosphor, whereas a difference in potential applied in the appropriate direction will cause the beam to deflect to impinge the red or blue phosphor. In accordance with the invention, the apparatus is arranged to respond to simultaneously received green, red and blue video signals by means of a sinusoidal oscillator 49 which controls gate stages 63G-63B in a sequence to pass samples of the green, red and blue signals to modulate the cathode-ray tube grid 11 and simultaneously applies switching potentials to the two sets of strips 19, 21 to cause the correspondingly coloured phosphors to be impinged. The oscillator, which is free-running, operates at about 4 Mc/s. and produces a first output through transformer 53 for application over leads 23 and 25 to the two sets of strips. Further outputs in antiphase are derived from windings 61R and 61B and applied to switch the red and blue gate stages 63R and 63B. The output from winding 61B is also applied through a 90 degrees phase-shifting circuit 67, 69 to a frequency doubler stage 71, the output from which switches the green gate stage 63G. As shown in Fig. 2, the gate stages are switched to produce pulses at the crests of the applied waves whereby signal samples are passed to the cathode-ray tube grid in the sequence red, green, blue, green, &c. Simultaneously the electron beam is controlled to impinge phosphors of the corresponding colour, red being impinged on the positive crest of oscillation between leads 23, 25, blue being impinged on the negative crests and green being impinged at each nodal point. The apparatus may be set up for a three-phase type of sampling. Specification 741,278 also is referred to.