baber/WOPTO huggingface dataset:
Patent GB-1225416-A (GB)
IPC: H02P1/46
Filed: 1968-06-21
Abstract: 1,225,416. Control of A.C. motors. GENERAL ELECTRIC CO. 21 June, 1968 [10 July, 1967], No. 29835/68. Heading H2J. An excitation control system for a synchronous motor 24 comprises a bi-stable circuit 16 have " start " and " run " modes, a speed detector 12 for switching 16 into its " run " mode during one half cycle of induced field current when the speed is at or above a threshold value, and a " solid state" circuit 18 which initiates energization of the field at the beginning of the next half cycle, thereby minimizing torque transients at the instant of energization. The field circuit is completed through a diode 54, and a thyristor 56 which is triggered only during starting by a neon tube 58. Field current induced during starting is detected by a winding 60 and during alternate half cycles causes a transistor 68 to conduct to discharge a capacitor 84 which is charged during the opposite half cycles from a constant voltage source + V through resistors 86, 88, 90. At the threshold speed the charge on 84 becomes high enough (before it is discharged) to trigger unjunction transistor 82 which changes over bi-stable transistor circuit 74, 78 from the start mode (78 conducting), to which it had been set by a polarity sensing transistor 72, to the run mode (74 conducting), thereby turning on a transistor 92 which applies the +V voltage to the excitation control circuit 18. This functions as an AND gate, the other input to which is from the field polarity sensing transistor 72 so that at the beginning of the next half cycle a triggering pulse is applied via transformers 42, 50 to thyristors 34, 36 connected in a bridge with diodes 46, 48 to energize the field from supply transformer 28. The circuit automatically switches to the start mode if the motor falls out of synchronism. The circuit 18 comprises a unijunction transistor whose emitter is connected to the two inputs and one base of which is connected to a square wave generator which turns on when the input conditions are appropriate.
Patent GB-1228171-A (GB)
IPC: A63B51/02
Filed: 1967-04-06
Abstract: 1,228,171. Strings. OSAKA GOSEN CO. Ltd. 8 April, 1968 [6 April, 1967], No. 15807/ 67. Heading D1T. A string for games racquets comprises a core consisting of at least one polymeric monofilament and at least one helical wrapping of a polymeric material and a liquid lubricant contained in the core and/or between the wrapping and the core. The core may be formed of longitudinal, aligned, twisted or plaited monofilaments which may be hollow. There may be more than one helical wrapping, the direction of winding of each wrapping being opposite to that of the previous layer. The material of the core and wrapping may be the same or different, e.g. a polyamide or polyester. The helical wrapping can be adhesively bonded to the core by using a solution of nylon in phenol and trichloroethane, followed by drying in a hot air stream. The lubricant may be contained in or between the filaments of the core the lubricant may be a vegetable or mineral oil or grease, e.g. paraffin wax, liquid paraffin, soy bean oil, habassic oil, palm kernel oil, palm oil, olive oil, coconut oil, castor oil; peanut oil or rape oil.
Patent GB-1229904-A (GB)
IPC: B29C70/00
Filed: 1969-03-06
Abstract: 1,229,904. Metal to fibre reinforced plastics composite laminate. AVIATION SUPPLY, MINISTER OF. 2 March, 1970 [6 March, 1969], No. 11869/69. Heading B5N. A process for manufacturing an article comprising a combination of a metal member and a fibre reinforced plastics composite comprises removably securing a layer of fibre reinforced resin plastics composite at one face to a metal backing member, bringing the other face of the composite into face to face bonding relationship with a metal structural member, the backing member having approximately the same coefficient of thermal expansion as the structural member, heating the members and composite to a temperature sufficient to bond the composite to the structural member, allowing the whole to cool and separating the composite from the backing member. The composite may comprise a layer of fibre reinforced uncured resin wherein bonding of the composite to the metal structural member is effected as the resin is cured by the application of heat, the resin itself acting as a bonding agent, or the composite may be a layer of fibre reinforced cured resin wherein a layer of adhesive is sandwiched between the structural member and the composite and bonding is effected by the adhesive setting when heat is applied. The fibre reinforcement may be of carbon fibres or glass fibres.
Patent GB-1229997-A (GB)
IPC: H01B13/30
Filed: 1968-08-05
Abstract: 1,229,997. Cables. SIEMENS A.G. 5 Aug., 1968 [4 Aug., 1967], No. 37335/68. Heading H1A. A method of making a heavy current electric cable, in which a conductor 1 and its surrounding screen 7 are covered by paper tapes 2, which are impregnated with an impregnating mass 3, the latter then being brought into an elastomeric state by a cross-linking action at elevated temperatures. The cross-linking is accompanied by polymerization, or by a polyaddition reaction, the impregnating mass, e.g. low-polymer polyolefin being such that it is capable of undergoing such a reaction with material, e.g. dicumyl peroxide, already present in or beneath the insulation. The tapes may be of plastics material, non-woven fabric, tapes or foils. The cable is surrounded by an earthed screen 4 and by an outer-plastics sheath 5 incorporating a metal foil 6. Multi-core cables may be made in a similar manner.
Patent GB-1230893-A (GB)
IPC: H01H9/34
Filed: 1969-09-26
Abstract: 1,230,893. Arc barriers. LEACH CORP. 26 Sept., 1969 [22 Nov., 1968], No. 47393/69. Heading H1N. An arc barrier for an electrical unit with multiple sets of contacts has integrally formed compartments of electrically insulating material formed by spaced parallel walls 12, 14, 16, base 18 and end wall 20, a spring alongside the end wall on shelf 22 holding the barrier in position within the electrical unit. The unit, e.g. a relay, has each set of contacts enclosed within a separate compartment. The end wall has semicircular slots 24 to accommodate leads 32 to the contacts. Bow spring 28 connected to the relay base urges base 18 of the barrier against the relay cover 30.
Patent GB-1233233-A (GB)
IPC: B65D19/00
Filed: 1968-10-22
Abstract: 1,233,233. Load handling; pallets. UNION STEEL PRODUCTS CO. 22 Oct., 1968 [15 Nov., 1967], No. 50159/68. Heading B8H. A pallet comprises upper and lower platforms 11 of longitudinal and transverse wires 15, 16 received at the edges between two rods (17a), (17b), Fig. 3 (not shown) forming the peripheral framework of the pallet. The respective platforms are spaced apart by spacers 12, 13 located at the corners and mid-way therebetween, which spacers 12, 13 are substantially corrugated in plan view and the walls 20, 21, 25, 26 of which have slots (24), Fig. 6 (not shown), in which to receive the innermost frame-members (17b). The corner supports 12 are so shaped in conjunction with the frame members to provide a socket for side walls and for a post for stacking the pallets. The frame-members may comprise two pairs of U-shaped members each joined on a different opposed pair of spacer members 13. Alternately, Fig. 7 (not shown), the frame members may be continuous. The pallet may be reinforced by a rod 18 extending between a pair of opposed sides and is further reinforced by wires (19) extending from the other pair of opposed sides and under said rod 18.
Patent GB-1233802-A (GB)
IPC: G01S13/78
Filed: 1968-06-25
Abstract: 1,233,802. Pulse radar. HAZELTINE CORP. 25 June, 1968 [31 Aug., 1967], No. 30203/68. Headings H3T and H4D. In a position monitoring system an interrogator at a central station emits a coded signal comprising at least a reference portion, each (mobile) transponder responds to the coded signal to generate a reply signal distinguishable in time relative to the reference portion from the reply signals of all other transponders, and at the interrogator the reply signals are compared temporally with the emitted signal to provide an indication of the position of each transponder. The reference portion in the embodiment, Fig. 2, consists of a pair of pulses and further pulses in a recurrence period identify by their timing the transponders which are to reply but such further pulses are not transmitted if the transponders and the interrogator are synchronized. At a transponder, Fig. 3, the received signal, a circuit not shown, generates for each pulse a pulse delayed therefrom by the time interval between a reference pulse pair; the delayed pulses and undelayed pulses are applied to an AND gate 34. A multivibrator 30 provides a synchronizing signal for an AND gate 31 the output from which resets a counter 40 which counts the pulses as received (i.e. undelayed) to generate a timing signal after reaching a predetermined count. The counter in each transponder is preset to a different count. The timing signal activates multivibrator 38 to generate a control signal of predetermined duration. A generator 27 adds a reply pulse when actuated, e.g. in emergency. The reference portion may be a single large-amplitude pulse. The system reduces interference by, e.g. multiple reflexions in built-up areas.  Transistor pulse-delaying circuit, Fig. 3a. Counter 40 may be replaced by an analogue circuit: an input pulse through resistor 42 cuts off saturated transistor 43, the voltage at the collector then decaying from a magnitude of about + V 2  towards - V 1 ; when such voltage decays to a predetermined magnitude unijunction transistor 46 saturates and causes saturation of transistor 47 to afford a delayed pulse. The delay is different in each transponder and is given by the magnitudes of capacitor 44 or resistor 45 or the voltages - V 1  or +V 2 .
Patent GB-1233936-A (GB)
IPC: B32B27/00
Filed: 1968-07-23
Abstract: 1,233,936. Laminated packaging film. OSCAR MAYER & CO. Inc. 23 July, 1968 [14 Aug., 1967], No. 35105/68. Heading B5N. [Also in Division B8] A laminated packaging film comprises an ethylene-vinyl acetate copolymer film containing 30-40 wt. per cent vinyl acetate adhered at one face at least to an oxygen-impermeable film of polyvinylidene chloride, e.g. an 85 wt. per cent vinylidene chloride-15 wt. per cent vinyl chloride copolymer. The other face may be bonded to a film of polyvinylidene chloride, polyethylene, chlorinated polyethylene, ethylene-vinyl acetate copolymer or polyvinyl chloride. The laminate may be made by extruding ethylene-vinyl acetate and polyvinylidene chloride films into a water bath at 35- 100‹ F., whereby the polyvinylidene chloride film is rendered amorphous to assist the adhesion of the films between pressure rollers. The laminate may be heated to 150‹ F. or stored at ambient temperature to crystallize the polyvinylidene chloride film, either before or after its formation into a package.
Patent GB-1257463-A (GB)
IPC: E04G11/48
Filed: 1967-12-09
Abstract: 1,257,463. Scaffolding. MILLS SCAFFOLD CO. Ltd. 7 March, 1969 [9 Dec., 1967; 5 March, 1968], Nos. 56081/67 and 10526/68. Heading E1S. A scaffold tower has extension members 24 of rectangular channel section telescopically arranged at the upper end of tubes 22, the extension members carrying sockets at their upper ends for shuttering brackets 27, and being supported, in the embodiment shown, via flat pins 35 (Fig. 5, not shown) passing through aligned slots in the flanges of the members 24 and resting on the tops of the tubes 22. In an alternative embodiment (Figs. 7-11), the slots (134) in the flanges of the extension member (124) are of L-shape with upwardly and downwardly directed vertical legs in the respective opposed flanges. The supporting tubes each have at the upper end a spigot (61a) of reduced dimensions, and supporting a sleeve 61 with opposed T-shaped slots 62 therein. A load transmitting bar 63 passes through opposed holes in the sleeve and carries a pin 135 which extends through the T- and L-shaped slots in the sleeve and the extension member respectively. The bar can be pulled back and rotated from the engaged position shown in Fig. 9 when it extends through the horizontal legs of the L-shaped slots to move the extension member.
Patent GB-1257486-A (GB)
IPC: F16B39/34
Filed: 1969-07-15
Abstract: 1,257,486. Screw sockets. STANDARD PRESSED STEEL CO. 15 July, 1969 [15 July, 1968], No. 35441/69. Heading F2H. An insert 10 comprises a cylindrical body having internally and externally threaded surfaces, a groove 32 machined to the depth of the pitch diameter of the external threads and at least one area of the groove being plastically deformed radially inwardly to deform a portion of the internally threaded surface to provide a locking action on a fastener 18. A patch 40 of thermoplastic material such as nylon is bonded to the externally threaded surface of the insert to secure the insert in a member 14. As described, the groove is deformed at two diametrically opposite points, the deformation being located so that a crest of the internal threads of the insert is displaced to enhance the locking action of the insert.
Patent GB-1266986-A (GB)
IPC: E02F9/02
Filed: 1969-09-16
Abstract: 1,266,986. Excavators. ERNST MENZI AG. 16 Sept., 1969 [8 Oct., 1968], No. 45550/ 69. Heading E1F. [Also in Division F2] To minimise movement of an excavator over ground when the excavator is digging, at least one ground-engaging wheel of the or each undriven pair of wheels at one end of the chassis frame of the excavator is locked against rotation by a toothed wheel 1 coupled to the wheel being engaged by a pawl 6 pivotally mounted on the chassis. The wheel 1, which is rigidly secured to the ground wheel, may be either an internally or an externally toothed annular plate, the teeth being defined by flat surfaces having, between adjacent surfaces, included angles of about 90. Each tooth is symmetrical about a radius of the plate. The pawl is a rectangular, spring-loaded flat plate that, dependent on the form of its pivotal support on the chassis may also function as a ratchet pawl to allow of rotation of the wheel 1 in one or the other of the possible directions of rotation of the wheel.
Patent GB-1290342-A (GB)
IPC: G01G3/14
Filed: 1969-11-10
Abstract: 1290342 Weighing electrically ART'S-WAY MFG CO 10 Nov 1969 [2 July 1969] 54894/69 Heading G1N Weighing apparatus comprises a plurality of elastic members supporting a container to be weighed, each member bearing four resistance strain gauges so arranged that a first pair is in tension and the second pair in compression. On a feed mixer having a wheel 34 on an axle 10, gauges 14, are spaced axially of gauges 16, by a predetermined distance so that the weight supported by the wheel is proportional to the difference of the moments at the strain gauges, the gauges being connected differentially in a bridge circuit. A hitch 50 for a two wheel vehicle includes a member 60 bearing strain gauges 68, 68<SP>1</SP>, 70, 70<SP>1</SP>. The member rotatably mounted in bearings 74, 74<SP>1</SP> so that horizontal misalignment of the wheels due to uneven ground causes rotation of the member with respect to a drought vehicle so that no weighing error is introduced. An A.C. bridge includes a bridgebalancing potentiometer 98 and a readout potentiometer 102 with a slider 104 geared to a counter 106. In use with the load container empty the potentiometer 102 is adjusted for a zero count and the balancing potentiometer 98 set for a null on indicator 96. Potentiometer 102 is then set to a desired weight as shown on counter 106 and material added to the container until the indicator 96 shows a null. Methods for weighing additional material are described.
Patent GB-1297969-A (GB)
IPC: G08B5/24
Filed: 1969-12-05
Abstract: 1297969 Electromagnetic rotary indicators TELDIX GmbH 5 Dec 1969 [6 Dec 1968] 59667/69 Heading H2A An electromagnetic indicator comprises a permanent magnet rotor 7 and a stator comprising axially extending polepieces 2, each carrying a winding 3, the rotor being connected to an indicia carrying drum 10 whose axial length is greater than the length of its outer periphery divided by the number of indicia to be shown. Each of the indicia extends axially on the drum. The stator polepieces are formed on a central yoke member 1 and the stator assembly is embedded in casting resin 4. For a given rotor position either two or three adjacent windings are energized simultaneously. For improved positioning, the rotor, when cylindrical, Fig. 3 (not shown), may have slits (15) formed in its periphery.
Patent GB-1302793-A (GB)
IPC: B21C47/26
Filed: 1970-04-24
Abstract: 1302793 Electrolytic treatment of wire FURUKAWA ELECTRIC CO Ltd 24 April 1970 19764/70 Heading C7B Metal wire is treated electrolytically, e.g. electro-plated or electro-polished, using apparatus comprising at least two electrolytic treatment tanks for containing electrolyte and at least one pair of guide rolls positioned outside of said tanks such that the wire to be treated may be guided through the first tank, about the first guide roller, through the second tank, about the second guide roller and back into the second tank; the guide rolls serving to connect the wire to one pole of an electrical source. The form shown comprises two tanks 1 containing counterelectrodes 6, and vertically positioned guide rolls 2 having a plurality of circumferential grooves about which the wire passes, entering and leaving the tanks 1 via vertical slits in the end walls of the tanks. Electrolyte which flows out through these slits is returned to the tanks. The wire 5 passes from supply spool 10 through pro-treatment equipment 11 and 12 to the electrolytic tanks, and thereafter through post-treatment equipment 13 and 14 to the,take-up spool 15. Using the present method for electro-plating, the wire may be maintained in a wetted condition whilst passing between the electro-plating tanks by a liquid shower or spray. Examples are given of cleaning brass wire with sodium hydroxide followed by nickel plating from a Watts' bath, or followed by electro-plating with copper from a copper cyanide bath and thereafter with cadmium from a bath containing cadmium oxide and sodium cyanide; of cleaning steel wire with sodium silicate followed by electro-plating with tin using a potassium stannate bath; and of cleaning copper wire with trichloroettylene followed by electro-polishing using phosporic acid.
Patent GB-1320356-A (GB)
Title: Methods of feeding electrode wire and electrode-wire feeding devices
Inventor: SAMOKOVLIJSKI D A
IPC: B23K9/133
Filed: 1970-10-29
Abstract: 1320356 Welding by fusion NII PO ZAVARYAVANE 29 Oct 1970 [19 Feb 1970] 51559/70 Heading B3R A device for feeding electrode wire 3 in welding apparatus comprises opposed grooved rollers 5 having grooves of hyperboloidal section the rollers being driven by a motor 1 in planetary manner about the wire 3 which they engage under adjustable pressure, with the roller axes at an angle to the wire feed direction and the rollers free to rotate about their own axis. The rollers 5 are mounted on piston members 7 which are radially adjustable by means of a conical member 4 threaded on the motor shaft 2 so that the device can accommodate wires of different diameters and the contact pressure of the rollers on the wire 3 may be adjusted. In a second embodiment radial adjustment of the rollers is controlled by a scroll plate (Figs. 4-7, not shown).
Patent GB-1323050-A (GB)
Title: Fermentable flour water mixture treatment
IPC: B01F7/00
Filed: 1971-08-16
Abstract: 1323050 Dough G P STERNBERG 16 Aug 1971 38402/71 Headings A2A and A2B [Also in Division B1] A fermentable flour and water mixture is successively blended and fermented, both operations being performed under pressure higher than atmospheric. Apparatus for blending the mixture comprises a screw conveyer 18 driven through reduction gearing 20 and enclosed in a housing 11 with longitudinal ribs 22 and a tapering discharge end 12 with a fixed, apertured plate 7 and a rotary, apertured plate 9, this arrangement causing the mixture to be pressurised as it is blended during its passage through the conveyer. The mixture is discharged into a hopper 25 of a fermentation vessel 24 comprising a screw conveyer 30 which rotates at a speed such that the mixture is retained for the required fermentation period before it is dischargd at 27. The expansion of the fermenting mixture results in its being pressurised during its passage through the vessel 24. Alternatively, if the mixture is a brew with insufficient body to be carried forward by a screw conveyer, the fermentation vessel may be a closed container pressurised by air or an inert gas. The mixture discharged from the fermentation vessel may pass to a further rotary mixer where water is added to form a slurry which may then be pumped, under the control of valves, to alternative receivers where additional ingredients, e.g. sugar, lard, dry milk, are mixed with it to form doughs for different purposes, e.g. to produce a bread dough and a bun dough.
Patent GB-1332067-A (GB)
Title: Analog-to-digital converter
IPC: G01S7/292
Filed: 1971-11-03
Abstract: 1332067 Pulse radar; pulse amplitude discriminators M HIKOSAKA 3 Nov 1971  51085/71 Headings H3P and H4D In apparatus for converting an analogue video signal into digital form a plurality of integrators associated with differently phased pulse trains thereby reducing "conversion loss' in a known apparatus Figs. 1 to 6 (none shown) when an echo signal straddles adjacent intervals in a single pulse train. The embodiments relate to pulse radar video signals from a logarithmic receiver and in one embodiment gating trains F/F2 Fig. 9, S.F/F2 control integrators 10, 10a, Fig. 7 to afford the outputs indicated. Threshold detectors 12, 12a have levels controlled manually or automatically and their digital outputs feed detectors 17, 17a, see also Fig. 8 (not shown) and Fig. 4 (not shown), to yield a final output E5, Fig. 9 for a computer. The conversion loss for various amounts of straddle is depicted Fig. 10 (not shown). A further reduction in conversion loss, so as not to exceed 1dB, is achieved by an embodiment utilizing four integrators, Figs. 11, 12, 13 (none shown).
Patent GB-1339566-A (GB)
Title: Hoppers
IPC: B65D90/58
Filed: 1970-10-30
Abstract: 1339566 Hoppers for feeding sheets TRUE FLUE Ltd 10 Nov 1971 [30 Oct 1970] 51853/70 Heading B8S A hopper 1 for feeding soiled linen &c. to a shoot 2 comprises a material inlet door 4 and a material outlet shutter 5 mechanically interconnected together so that when one is opening or open, the other is held closed and vice versa. The door 4 is pivotally mounted about a horizontal axis 6 and is opened by a hand grip 7, whereas the shutter 5 slides vertically under the control of counterweighted cable and drum mechanisms 16, 16A, 17 manually openable by a drum handle 15. A pivoted lever arm 14, at its upper end, is gravitationally or spring biased downwardly to lock the door 4 closed when the lower end of the lever 14 is free, this lower end being freed by the shutter 5 as soon as it starts to move upwardly to open. Side cheeks on the hopper door 4 each have an arm 9 pivotally connected at one end thereto, the other end being pivoted to a disc 8 on the hopper housing, and a further arm 10 pivoted to each disc 8 passes through guides 11 and 12 to cross the travel path of the shutter 5, the arrangement being such that as soon as the door 4 starts to open, the discs 8 rotate causing the rods 10 to block the path of the shutter 5 thereby preventing it opening.