baber/WOPTO huggingface dataset:
Patent GB-1513279-A (GB)
Title: Motor control circuits
IPC: H02M7/757
Filed: 1975-12-08
Abstract: 1513279 Controlling motors; converters VILLAMOS AUTOMATIKA INTEZET 8 Dec 1975 [6 Dec 1974] 50274/75 Headings H2J and H2F A motor control circuit comprises a plurality of controlled rectifiers arranged to supply at least one controlled current and a control circuit for preventing triggering of undesirable combinations of the controlled rectifiers, the control circuit including at least one channel consisting of a current differential transmitter arranged to provide an output signal corresponding to the first derivative with respect to time of the or one of the controlled currents, a shaping unit consisting of a rectifier, a limiter and a low pass filter in cascade connected to the output flow of the transmitter, and a logic network connected to the output of the shaping unit and arranged to detect when the first and second derivatives with respect to time of the controlled current are zero, the logic network being arranged to prevent triggering of the controlled rectifier or rectifiers which are not supplying the controlled current or currents until said first and second derivatives are substantially zero. As shown in Fig. 1, a D.C. motor 1 is driven in one direction from an AC supply via controlled rectifier 2 and on the opposite direction via controlled rectifier 3, under the control of a unit 10, differencing circuits 8, 9, feedback from a shunt 5, adding circuits 6, 7 and triggering units 4, 5. To prevent simultaneous conduction of rectifiers 2, 3, and inductive transducer (transmitter) 11, 12 provides a signal representing the first derivative w.r.t. time of the current supplied to the motor. This signal is applied to a rectifier 13 whose output is applied to an amplitude limiter and integrator R, Z, C. The logic network 14 detects when the integrated signal is zero for a predetermined time, e.g. 4-5 Ás, thus indicating that the first and second derivatives are zero. The outputs of the logic network are applied to the inhibit inputs 26 of the triggering units 4, 5. As shown in Fig. 2, an A.C. motor 20 is supplied by a three-phase supply RST via controlled rectifier networks 21, 23 and 25 for one direction of rotation and via rectifier networks 22, 24 and 25 for the other direction, the rectifier networks being under the control of circuitry as described with reference to Fig. 1. Transmitters 27, 28 are provided in two respective phase lines to the motor, and logic networks 29, 30 are provided and have their outputs connected to the networks 21, 22 and 23, 24 respectively. The transmitters may consist of a Hall generator or a capacitative transmitter connected to an amplifier and differentiating circuit.
Patent GB-1439139-A (GB)
Title: Surfacing material
IPC: D06N3/10
Filed: 1972-11-01
Abstract: 1439139 Coated needle felt JENS VILLADSEN'S FABRIKER AS 31 Oct 1973 [1 Nov 1972] 50342/72 Heading B2E A needle felt is top-coated with a layer of a polymer-containing reclaimed rubber particles, the polymer being neoprene or a styrene/butadiene copolymer. The felt is preferably made from a synthetic fibres or mixtures thereof with natural fibres such as polypropylene and nylon fibres, optionally supported by a supporting web. Before or after application of the top coat, a coat of styrene/butadiene copolymer, gelatinised p.v.c., or a preformed rubber or plastics foam may be applied to the under side of the felt. The binder is preferably applied as an emulsion by rollers, spraying or scraping, or a melt of the binder may be applied. The top surface of the felt may be precoated with plasticised p.v.c. or viscous styrene/butadiene copolymer, or the felt may be impregnated with a binder. The top coat may be overcoated with a cured neoprene latex layer. The coated felt may be used as an indoor or outdoor sports surface and the felt may be coated after being bonded to a surface.
Patent GB-1281738-A (GB)
Title: Ceiling air terminal
IPC: F24F11/04
Filed: 1969-10-14
Abstract: 1281738 Ventilators CARRIER CORP 14 Oct 1969 [29 Nov 1968] 50495/69 Heading F4V The subject-matter of this Specification is identical with that described in Specification 1,281,737, but the claims are concerned with an air terminal comprising a plenum chamber, an apertured plate within the plenum chamber forming an air distribution chamber, and a damper controlling the flow from the distribution chamber and including at least one plate having a recess with an inflatable bladder therein and another plate co-operating with the bladder.
Patent GB-1164319-A (GB)
Title: Dehydrogenation Processes and Catalysts Therefor.
IPC: B01J23/78
Filed: 1966-11-11
Abstract: 1,164,319. Dehydrogenation catalysts. MONSANTO CO. 11 Nov., 1966 [12. Nov., 1965], No. 50708/.66. Heading B1E. A dehydrogenation catalyst comprises iron oxide having intimately dispersed therein zinc oxide or copper oxide and an alkali metal promoter (usually K 2 CO 3 ) such that the magnetic susceptibility is from 30 x 10<SP>-6</SP> to 300 x 10<SP>-6</SP> c.g.s.u. and surface area from 1-5 m<SP>2</SP>/gm. Additionally the catalyst may contain Cr 2 O 3  and diluents, binders or stabilisers e.g. Al 2 O 3 , ZrO 2 , BeO, silicates, cement, calcium aluminate, Kaolin, ball clay or stearic acid. The catalyst may be extruded into desired shapes.
Patent GB-1485329-A (GB)
Title: Isochronous cyclotrons
IPC: H05H13/02
Filed: 1975-12-11
Abstract: 1485329 Cyclotrons ATOMIC ENERGY OF CANADA Ltd 11 Dec 1975 [7 March 1975] 50885/75 Heading H1D In an isochronous cyclotron having flutter poles 16, trimming of the magnetic field, e.g. to permit operation at different output energies, is effected by reds 25 of magnetic metal movable in bores 26 passing through the polepieces. As shown, an identical array of rods in each polepiece is employed, the rods being graded in size in the radial direction. The cyclotron may have a magnetic yoke 10 which acts as a shield and includes cryostats 11 and 12 containing superconductive main coils 13A and 13B.
Patent GB-1408462-A (GB)
Title: Reel for a vehicle safety harness
IPC: B60R22/40
Filed: 1972-11-03
Abstract: 1408462 Reel for vehicle safety harness G E W SVENSSON 3 Nov 1972 [29 Nov 1971] 50886/72 Heading A3V  A reel for a vehicle safety harness comprises a spring acting against belt withdrawal, a ratchet wheel 4 keyed to the reel spindle 2, and a locking member 10 resting freely in a cavity 9 formed, for example, in a ring 6 and adapted to slide or tip into locking engagement with the ratchet wheel if the reel is tilted through a predetermined angle. If the reel tilts in the plane of the ratchet wheel the apex 14 of the wedge shaped head 12 partially engages a ratchet tooth and lifts the locking member to the broken-line position of Fig. 4 for complete engagement with the tooth. On lateral tilting the member tips about the bevelled lower surface of its rear portion 13 and the locking action is facilitated by a pin 25 which lifts the head 12 and, for tilting in the direction shown in Fig. 6, by an abutment 22. A belt-sensitive locking mechanism is also provided comprising an inertia ring 29 which engages the abutment 22 to lift the member 10 into locking position in the event of rapid belt withdrawal.
Patent GB-1020198-A (GB)
Title: Improvements in or relating to reciprocating cutter arrangements for mowers or like cutting machines
Inventor: EISTERT THEODOR
IPC: A01D34/13
Filed: 1964-12-16
Abstract: 1,020,198. Reaping machines. KOMBINAT FORTSCHNITT LANDMASCHINEN VEB. Dec. 16, 1964, No. 51121/64. Heading A1F. The reciprocating cutter of a mowing machine comprises a blade support 1 to which the blades 2 are secured and a reinforcing strip 3 secured to the support above the blades, the support and strip being extended at one end of the cutter to form a tongue 4 which is securable in a slot 5 in an element 6 of the driving mechanism for the blade, the element being rotatable relative to a bearing 9 about an axis perpendicular to the length of the cutter. The bearing 9 is carried by a rocking lever 11 connected to driving means (not shown). The tongue 4 is clamped by a nut 8 into the slot 5 in the bolt 6. The reinforcing strip is stepped at its end forming the tongue to accommodate for the thickness of the blades 2. The blade-structure can be withdrawn from the slot by a tool inserted into a hole 13 at the opposite end 12 of the blade support.
Patent GB-1369481-A (GB)
Title: Roof structures
IPC: E04H1/12
Filed: 1971-11-03
Abstract: 1369481 Roofed structures SKERNE ENG Co Ltd 3 Nov 1972 [3 Nov 1971] 51202/71 Heading E1A A roofed structure such as a canopy for a petrol filling station forecourt comprises at least one column 12 or 13, a spine girder 11 carried thereby and a plurality of rafters 14, 15, 16, 17 extending transversely through and supported on the spine girder which is in the form of an open trellis structure. The structure is provided with ceiling panels, a facia board 20 and roofing panels 19 which may be corrugated and direct storm water into gutters 40 on either side of the spine girder 11; the girder 11 being protected by a capping panel 41 and the gutters discharging through drain pipes 26 arranged in the columns 12, 13. For constructional details of the spine girder, its spigot and socket connection to the columns, method of erection, joints and modified structures the Specification and remaining drawings, (not shown), should be referred to.
Patent GB-1194739-A (GB)
Title: A New or Improved Method for Forming Thermal Insulation Material into Sectional Shapes
Inventor: MACWILLIAMS JOSEPH ANTHONY
IPC: B29C43/22
Filed: 1967-11-11
Abstract: 1,194,739. Moulding pipe insulation. MICROPORE INSULATION Ltd. 23 Jan., 1969 [11 Nov., 1967], No. 51410/67. Heading B5A. [Also in Division F2] Thermal insulation material is formed into the desired shape by injecting the material into a confining envelope of porous material, passing said envelope containing the insulating material between rollers to impart the desired shape thereto and treating the insulating material and/or the envelope to render it substantialy rigid. The confining envelope is preferably of cylindrical form and is passed continuously over the end of a mandrel through which the insulation material is injected into the envelope. The insulating material may be a wet slurry which is heated after shaping or may be a powdered microporous material, the envelope being coated with a rigidizing material after shaping, the microporous material may be a silica aerogel and the envelope glass fibre which is coated with a ceramic stiffener. In the embodiment shown the envelope 11 is made by wrapping overlapping layers of glass fibre 13 around a mandrel 10 and sticking the glass fibre with adhesive from container 14. Insulating material is supplied from hopper 15 and through the mandrel 10 by screw 16 and partially fills the tube which is forced into shape between rollers 12. The glass fibre is then impregnated and hardened.
Patent GB-1446217-A (GB)
Title: Gain control circuit
IPC: H03G3/30
Filed: 1973-11-08
Abstract: 1446217 Gain control SONY CORP 8 Nov 1973 [9 Nov 1972] 51928/73 Heading H4R Gain control circuit comprises a signal current source 201 connected via a resistor 202 to the emitter of a common base amplifier transistor 203 having a load 205 in its collector circuit. A variable impedance 209 is connected in parallel with the signal current source to shunt part of the signal current away from the amplifier transistor 203 and provide control of the gain of the circuit. As described the variable impedance may be a diode Figs. 7 and 8 (not shown) or the collector emitter or collector base path of a transistor Figs. 3 to 6 (not shown), and the minimum value of impedance can be limited by a resistor or capacitor in series with the variable impedance. The signal current source can be a common emitter amplifier with a current setting resistor in its emitter circuit (Figs. 3 to 8). Two similar circuits may be connected in cascade to give the required gain range with the gain reduction of the first stage less than that of the second stage to reduce the noise level.
Patent GB-1183679-A (GB)
Title: Geodetic Instrument.
Inventor: SAUBERLICH GERHARD P
IPC: G01C5/00
Filed: 1968-11-04
Abstract: 1,183,679. Surveying instrument. ELGEO INSTRUMENTS OF AMERICA Inc. Nov.4, 1968 No.52198/68. Heading G1F. A geodetic instrument comprises a base having a levelling head with an upstanding post thereon (not shown), a housing 20 rotatable about a vertical axis on the post, which is located inside the lower part 21 of the housing, two spaced upstanding arms 22, 23 forming part of the housing carrying a horizontal shaft on which is rotatable a casing 30 containing a telescope with an eye-piece 50 and electronic distance-measuring means with a parabolic reflector 32, the axes of the telescope and electronic distance-measuring means being aligned, a horizontal graduated circle 56 concentric with the upstanding post in the lower part 21 of the housing 20, and a vertical graduated circle 63 concentric with and fixed in relation to the shaft between the arms 22, 23, light sources being associated with each of the circles 56, 63 and optical reflectors for directing light through diametrically opposed portions of each of the circles 56, 63 and thence to a viewing microscope 51 on the arm 22. For the horizontal circle a lamp produces a light beam 62 which passes via reflector 57 through the circle 56 and after reflection at mirrors 58, 59 through the diametrically opposite portion of the circle 56 and is then reflected by way of reflectors 60, 61, 69, 70, 71 and 74 to the microscope 51. A similar system is used for the vertical circle employing a light beam 68 for a further lamp and reflectors 64, 65, 66, 67, 72, 71 and 74.
Patent GB-522739-A (GB)
Abstract: 522,739. Closed solid fuel stoves. ZUBERBUHLER, A. Dec. 14, 1938, No. 36471. Convention date, Dec. 31, 1937. [Class 126] In a domestic stove burning solid-fuel supplied to a combustion chamber 2, there are three paths leading to the flue outlet 13, and a member 7 arranged in the latter is adjustable to vary the proportions of the gaseous currents along the three paths. The first path is the flue 4, which receives the products of combustion of the solid parts of the fuel with primary air. The second path comprises the flue 3, the space 8 within the outer casing, from which heat is radiated, and the flue 5, and receives the products of combustion of the gaseous parts of the fuel with heated air supplied through passages b. The third path is a passage 6, the lower part of which lies between the walls of the chamber 2 and the heavy heataccumulator 9, and which receives air from the ash-pit. The member 7 is rotatable. A serpentine passage 11 for water may be provided in the heat-accumulator. The Specification as open to inspection under Sect. 91 states that the invention is applicable to hot-air stoves, cooking stoves, and small waterboilers. This subject-matter does not appear in the Specification as accepted.
Patent GB-1500209-A (GB)
Title: Radar signal discrimination method and a radar system embodying the method
IPC: G01S13/931
Filed: 1975-12-24
Abstract: 1500209 Vehicle radar system NISSAN MOTOR CO Ltd 24 Dec 1975 [24 Dec 1974] 52834/75 Heading H4D For discriminating against unwanted echo signals from unimportant objects in a given zone, a radar carried by a motor vehicle is equipped to sense the entry of the vehicle into the zone and its exit from the zone, to reduce the echo detection range from long range to short range when the entry is sensed, and to restore the long range detection ability when the exit is sensed. In the Figs. 3a, 3b embodiment, units 30, 31 provide transmission pulses to antenna 12, and units 33,. 37 convert echo signals to an IF frequency. Comparator 39 squares up the IF signal pulses and eliminates low-level clutter. The resulting echo pulses are range-gated at 43. Roadway markers comprising buried magnetic plates mark the ends of the zone and are sensed by a Hall generator 17 on the vehicle. Decoder 40 counts pulses from generator 17 to determine whether the zone entry or exit has been sensed, and correspondingly enables either a long or short gating pulse (from monostable 50 or 53 respectively) to control the range gate 43. Target range is determined at 42 by counting clock pulses in the period between the transmission pulse and the gated echo reception. The magnetic markers may be replaced by reflective stripes; and the Hall generator 17 by a photoelectric sensor (Fig. 7, not shown). A second embodiment (Fig. 8, not shown) uses unmodulated CW transmission instead of pulses. Echo signals are heterodyned with the transmission frequency to obtain Doppler signals, the strength of which varies inversely with target range. The Doppler signals are not gated, but are fed via a controllable attenuator to a threshold detector, the output. of which actuates vehicle braking or alarm devices. When the vehicle enters the zone, the attenuation of the Doppler signals is switched from a low to a high value, whereby the threshold is exceeded only by high amplitude Doppler signals, i.e. in response to short-range targets. The low attenuation value is restored when the vehicle leaves the zone. The Doppler signals are fed also to a relative speed indicator.
Patent GB-1369241-A (GB)
Title: Cathode-ray tube displays device
IPC: H04N5/74
Filed: 1971-11-18
Abstract: 1369241 Modulating light PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 18 Nov 1971 [21 Nov 1970] 53607/71 Heading H4F [Also in Division H1] A projection display device of the type comprising a cathode-ray tube containing a screen which is locally deformable by the electron beam, and means for directing light at the screen to be variably reflected by it, is characterized in that the screen comprises electrostrictive or piezo-electric material. The light is preferably reflected on to the screen by a diffraction grating so that light reflected from undeformed areas is intercepted by the grating (Fig. 1, not shown). In one example, Fig. 2 (not shown), the target comprises a polycrystalline polished plate of BaTiO 3  0À2 mm. thick on a metal support; in a modification (Fig. 4, not shown) the surface is fluted. Another construction, Fig. 3 (not shown), comprises a plate of polished sintered polycrystalline PbZr 0À5 Ti 0À5 O 3  2À5mm. thick provided with a conductive layer to serve as an electric contact. The sensitivity may be increased by pre-polarizing the target; for this purpose, a pair of interdigitated comb-shaped electrodes may be evaporated on to both sides of the electrostrictive material and a potential difference of 2000V maintained between adjacent and opposite electrodes whilst the material is heated above its Curie temperature and allowed to cool, after which the electrodes are etched away and the reflecting surface is polished. If the material is thick, polarization through its thickness is difficult and the electrodes in the above process may be deposited on only one side to polarize the material at one surface only.
Patent GB-1187956-A (GB)
Title: Shaft Bearing.
Inventor: HAITH GEORGE
IPC: F16C17/10
Filed: 1966-12-01
Abstract: 1,187,956. Bearings. ULTRA ELECTRONICS Ltd. 1 Dec., 1967 [1 Dec., 1966], No. 53754/66. Heading F2A. A plain bearing comprises an inner plastics ring 1 with a convex bearing surface 2 slidable in an outer metal ring 3 with a concave bearing surface. The outer ring is split and has flanges 6 to prevent entry of large particles. Ring I s of nylon and ring 2 of phosphor bronze. In Fig. 3 (not shown) the outer ring is unitary and ring (1) moulded inside it. The bearing is used in electrical apparatus submerged in a liquid and is lubricated by the liquid.
Patent GB-1595245-A (GB)
Title: Method of producing thinclad materials for printed circuits
IPC: B32B15/08
Filed: 1977-12-29
Abstract: A film (21) consisting of insulating material is, first of all, continuously provided, by electrochemical means, with a metal layer (22) having a thickness in the range of 0.1 to 100  mu m and then exists in roll form. The composite material (20) consisting of film and metal layer is then cut to the same size as the core sheets (36-39) intended for forming a laminated moulded material (23) and is laid with its metal layer outwards on one of the outer core sheets. These parts are compressed by the effect of pressure and heat to form a homogeneous body. The process permits the production of basic material for printed circuits without the occurrence of waste material; a good bonding of the metal layer (20) with the laminated moulded material pressed at the same time being produced in one operation. <IMAGE>
Patent GB-1372428-A (GB)
Title: Quick-return severing device for a moving continuous rod
IPC: A24C5/28
Filed: 1971-11-23
Abstract: 1372428 Cutting tobacco rods GENERAL CIGAR CO Inc 23 Nov 1971 [25 Nov 1970] 54298/71 Heading B4B [Also in Division A2] A rotary severing device for cutting a longitudinally moving continuous rod into rod segments comprises a frame 14 reciprocally movable parallel to the axis of the continuous rod; a support plate 20 transversely mounted on the frame 14; a cylindrical ledger guide 28 held by the plate 20 near its free end; a rotatable shaft 44 supported by the plate 20 with its axis parallel to the axis of the continuous rod; a knife blade 58 eccentrically mounted on the shaft 44 and coating with the guide 28 to cut the continuous rod when the blade 58 passes transversely therethrough; drive transmission means on the plate 20 extending to the shaft 44 from a parallel drive shaft 80 of a length to permit reciprocation of the frame 14 therealong; and means to reciprocate the frame 14 and simultaneously rotate the drive shaft 80 so that the blade 58 cuts one of said rod segments from the continuous rod with each complete reciprocation of the frame 14. The ledger guide 28 includes a transverse slot (32) through which the blade 58 passes to cut the continuous rod. The shaft 44 is driven by a Whitworth drive 82 via the drive shaft 80 (which is of square section), a drive collar 66, and a timing belt 72, and is so synchronized that the blade 58 passes through the slot (32) at its highest rotational speed. The slot (32) may extend right across the bore 30 of the ledger guide 28, e.g. when used for cutting a continuous cigarette rod or a continuous cigar bunch rod, or only partly across as indicated by the dotted lines in Fig. 3, when used for cutting the tobacco sheet linking a continuous series of cigar bunches which have been wrapped and linked by a helically wound tobacco sheet. The device is also stated to be suitable for cutting continuous paper, plastics or rubber rods or tubes.
Patent GB-1098944-A (GB)
Title: Improvements in or relating to electrical supervisory systems
Inventor: BROWN ANDREW
IPC: H02J13/00
Filed: 1964-04-14
Abstract: 1,098,944. Interconnection systems. STANDARD TELEPHONES & CABLES Ltd. April 9, 1965 [April 14, 1964], No. 15341/64. Heading H4K. [Also in Division H2] In a system in which a station can be connected through alternative routes to another station, some or all of the stations are provided with a circuit which simulates the main connecting network. Each link of the main network is provided with a link-busy contact, e.g. AB in the corresponding portion of the simulator network and each station is represented by a relay, e.g. AR. In the station at which the simulator is located, e.g. E, the positive pole of a battery is connected to the network side of the associated relay, the free sides of all the relays being taken to the negative pole. Those relays, corresponding to stations to which at least one free route extends from E, come-up and operate a suitable indicator so that the state of the network can be seen immediately. The relays may be replaced by solid state switches. The system is applicable to the supervision of an electricity supply network in which messages may be sent over the power lines or over an independent communications network.