baber/WOPTO huggingface dataset:
Patent GB-1289477-A (GB)
IPC: H02M7/523
Filed: 1968-10-25
Abstract: 1289477 Automatic tuning arrangement DEFENCE SECRETARY OF STATE FOR 27 Oct 1969 [25 Oct 1968] 50762/68 Heading H3A [Also in Divisions H2 and G1] In an inverter or frequency changer for supply of power to an induction heater, extra capacitance is switched in across the inductive load in response to an increase in current on the D.C. (or low frequency) side of the inverter. Fig. 1 (not shown) depicts a pair of thyratrons alternately turned on to switch current through an inductor to opposite sides of a centre tapped output transformer, the secondary of which feeds the winding of an induction heater. The supply current for the converter may be derived from a three-phase rectifier RV, the current in each phase being monitored by current transformers CT1 ... CT3 the outputs of which are rectified by Zener diodes FWR2, the resulting voltage being developed across R2. The voltage across R2 is compared with an adjustable reference voltage at the slider of variable resistor RV so that when the current supplied to the inverter exceeds a predetermined value, an amplifier AMP becomes effective and turns on a transistor J which energizes a relay RO contacts of which (not shown) connect an extra capacitor across the induction heater. Negative feedback via capacitor C3 prevents unwanted operation due to transients. Positive feedback via R8 ensures a rapid response once the voltage rises sufficient to turn off diode D9. Similar circuits B, C, using different reference voltages connect further capacitors following further increases in supply current. The Zener diodes FWR2 protects the ammeter A against short circuits. The power factor correcting capacitors may be switched in binary manner.
Patent GB-1289553-A (GB)
IPC: H01B11/08
Filed: 1969-11-17
Abstract: 1289553 Cables SUPERIOR CONTINENTAL CORP 17 Nov 1969 [22 Nov 1968] 56134/69 Heading H1A In a telecommunication cable a metal foil electrical shield 15, 15<SP>1</SP>, 15<SP>11</SP>, Fig. 12, or 15, Fig. 16, or 15, Fig. 17, is provided between groups of insulated conductors 14, 16 transmitting signals in opposite directions. The metal foil, e.g. of aluminium may be coated on one or both sides with plastic insulating material, e.g. polyethylene, polypropylene or polyethylene terephthalate, or completely surrounded, i.e. also at the edges, by plastic insulating material. Where the foil is uncoated, and possibly also where the foil is coated, conductor regions are filled with a polyethylene grease-like material serving both as dielectric insulation and as a moisture barrier. The shielding foil may be longitudinally or helically wrapped around the conductors and may be corrugated to increase its mechanical strength. As shown in Fig. 12 the shield is composed of three overlapping helically disposed tapes 151, 15<SP>11</SP>, 15<SP>111</SP>. The composite core formed by the conductor groups 14, 16 is surrounded by a polyethylene terephthalate tape 17, a corrugated longitudinally folded or wrapped armour tape 18 which may be bonded on one or both sides to a layer of polyethylene, and a polyethylene sheath 19 which may be filled with carbon black. The metal foil may have a thickness of 0.0254 to 0.1270 mm. and may be twice the thickness of the dielectric coating. The polyethylene grease-like material has an average molecular weight below 10,000 and a density below 0.91 grms./ml, at 25 C. Rotating wire twisting apparatus and dies for applying a plastic-coated metal foil shield between groups of conductors are diagrammatically illustrated (Figs. 18, 19), the die plates having rows of radially spaced holes and slots for the conductors and foil shield.
Patent GB-1290462-A (GB)
IPC: B21C47/14
Filed: 1971-05-28
Abstract: 1290462 Winding wire HUTTENWERK OBERHAUSEN AG 28 May 1971 [4 Aug 1970] 18090/71 Heading B3E The position of a laying tube 5 mounted on a rotating loop layer 4, when a sheared end of a wire emerges from its mouth, can be regulated to prevent snagging of the wire end on a conveyer 7 during the formation of overlapping wire loops 1 on the conveyer. Shears 9 are allowed to be operated by a controller 10 when a signal has been received (a) from a photo-cell 11, the signal having been delayed by an adjustable timer 12 to allow the necessary cropping length at the start of the wire, and (b) from a stationary device 13, actuated by a member 14 mounted on the loop layer 4, the signal being delayed by an adjustable timer 15 so that the wire end emerges when the laying tube 5 is in the required position. When one quadrant of the loop layer is required to be blocked against wire emergence the shears 9 are allowed to operate by the controller 10 when (a) release is obtained from a timer 15a, which blocks release for a certain: adjustable period corresponding to a certain quadrant of the loop layer, coupled to the device 13. The signal from the device 13 is delayed by the adjustable timer 15 until the blocked quadrant of the loop layer has reached the desired position, and (6) the photo-cell 11 has transmitted its signal through the timer 12.
Patent GB-1294818-A (GB)
IPC: B26F1/10
Filed: 1971-06-16
Abstract: 1294818 Perforating apparatus MASCHINENFABRIK GOEBEL GmbH 16 June 1971 [18 June 1970] 28225/71 Heading B4B A perforating mechanism for simultaneously perforating sheets or webs along intersecting lines comprises a plurality of rotatable discs 18 provided with perforating pins 14, 15 and mounted on one or more shafts 5, 20, the pins being engageable with holes formed in a matrix roller 1, 2. Each disc 18 includes a ring 7 having flanges 8, 9 and rotatably mounted via bearings on a sleeve 6 eccentrically mounted on a shaft 5. The pins extend outwardly through holes formed in a member 10, the inner ends of the pins 14 for forming the longitudinal row of holes engaging with the frusto-conical surface of a ring 11; the ring 11 is provided with wedge members 12 adapted to engage the pins 15 which extend in the transverse direction. By rotating screws 13, the ring 11 is moved thereby causing the pins to be forced outwardly in order that the pins can be re-ground to conform with the initial diameter over the tips of the pins. The inner ends of the pins are embedded in a resilient foam plastic material 28 which permits the ring 11 to be moved while maintaining the location of the pins. An individual pin may be replaced by being pulled outwardly. In order to perforate the web in the portions between adjacent discs 18, further discs 19 are mounted on a second shaft 20 and arranged to cover the spaces between the discs 18. In an alternative arrangement, two matrix rollers (22, 23), Fig. 4 (not shown), are arranged to co-operate with their associated discs (24, 25), the latter being in staggered formation in order to completely perforate the web.
Patent GB-1296754-A (GB)
IPC: C07D491/04
Filed: 1970-02-02
Abstract: 1296754 1 - Substituted - 6,7 - methylenedioxy - 4(1H) - oxocinnoline - 3 - carbonitriles ELI LILLY & CO 2 Feb 1970 [4 Feb 1969 29 Dec 1969] 19320/72 Divided out of 1296753 Heading C2C Novel compounds of the Formula I wherein R is methyl, ethyl, n or i-propyl, nbutyl, #-hydroxyethyl or allyl may be prepared by reducing 2<SP>1</SP>-nitro-4<SP>1</SP>,5<SP>1</SP>-methylenedioxyacetophenone to 21-amino-4<SP>1</SP>,51-methylenedioxy -  acetophenone followed by diazotizing with nitrous acid and cyclizing to yield 6,7-methylenedioxycinnoline - 4 - ol, brominating to 3- bromo - 6,7 - methylenedioxycinnoline - 4 - ol followed by treatment with cuprous cyanide to form 6,7 - methylenedioxycinnoline - 4 - ol - 3- carbonitrile and alkylating to form the 1-alkyl, alkenyl or #-hydroxyethyl compound I. The compounds I are intermediates in the formation of pharmaceutically active 1-substituted - 6,7 - methylenedioxy - 4 - (1H) - oxocinnoline-3-carboxylic acids of the parent.
Patent GB-1296845-A (GB)
IPC: D06M11/71
Filed: 1969-11-04
Abstract: 1296845 Radiation-resistant cellulose INSTITUT OBSCHEI I NEORGANICHESKOI KHIMII AKADEMII NAUK BSSR 4 Nov 1969 53908/69 Headings C3A and C3G [Also in Division G6] A method of producing fibrous material for use in forming radiation shielding fabric comprises modifying cellulosic fibres to form acid groups in the cellulose in the fibres without destroying the fibres and treating the modified fibres with an aqueous solution of a salt of a radiation-absorbent metal (e.g. lead or barium). The chemical modification of the cellulose may be effected by (i) esterifying the cellulose to form acid esters, e.g. by phosphating or by treating with a polybasic organic acid such as citric acid, or (ii) grafting on to the cellulose monomers containing acidic groups, e.g. methacrylic acid, or (iii) oxidation of the cellulose, e.g. with nitrogen oxides, so that carboxylic groups are introduced into the cellulose. To colour the material, the chemically modified cellulose containing acidic groups may be treated with solutions containing not only a salt of a radiationabsorbent metal, but also a salt of a metal capable of forming coloured compound with the cellulose. Thus, for example, the modified cellulose can be treated with a solution of lead and copper salts, or lead and nickel, or barium and iron salts. Alternatively, the modified cellulose can be treated with a solution of a salt of a metal which forms coloured compounds, either before or after its treatment with the solution of the salt of the radiation-absorbent metal. In the chemical modifications of cellulose described in the examples, cotton cloth is (a) treated with an aqueous solution of orthophosphoric acid and urea or with an aqueous solution of citric acid or (b) alkylated by treating it with a sulphuric ester of 4-#-hydroxyethylsulphonyl-2-aminoanisole, and then treated with an aqueous solution of monomeric methacrylic acid to obtain a grafted copolymer of cellulose and polymethacrylic acid or (c) oxidized with nitrogen dioxide. Metal salt treatments of the chemically modified cotton cloth mentioned in the examples are with aqueous solutions of lead acetate, barium chloride, (lead acetate + copper acetate), (iron chloride then ammoniacal copper sulphate then lead acetate) or (chromium acetate then barium chloride).
Patent GB-1307249-A (GB)
Title: Spanner
IPC: B25B15/02
Filed: 1970-06-11
Abstract: 1307249 Spanner W A WOODWARD 27 May 1971 [11 June 1970] 28415/70 Heading B3N A spanner comprises a handle portion 1 at least one engaging portion 2 depending therefrom, the or each engaging portion having two outer projections 4, 5 substantially perpendicular to the handle and adapted to engage opposite faces of a nut and a central projection 3. If the spanner has an engaging portion at each end then these will be suitable for different size nuts.
Patent GB-1307813-A (GB)
Title: Arc welding torches
IPC: B23K9/028
Filed: 1969-02-26
Abstract: 1307813 Fusion welding FOSTER WHEELER JOHN BROWN BOILERS Ltd 25 Feb 1970 [26 Feb 1969] 10404/69 Heading B3R An arc welding torch for welding internal bores particularly of very small tubes comprises a torch body 12, a rotatable stem 14 projecting from the body and carrying a non-consumable electrode 16, the stem having a core 18 of material of high heat conductivity which is in contact with both the electrode 16 and a heat sink block 26 in the torch body. The block 26 is of larger heat capacity than the core and in use heat is conducted away from the electrode to the block 26. The core and block are preferably of copper. A ceramic sleeve 20 surrounds the core 18 and is itself enclosed for the greater part by a guide sleeve 44 adapted to fit closely in the bore of a tube to be welded. Argon shielding gas supplied through a supply tube 51 passes down a channel 52 in the block 26 and via a passage formed by a flat on the core 18 to the electrode 16. Current is supplied from a supply lead 60 via a spring-loaded terminal 62 which makes contact with a carbon brush 64 in rubbing contact with the block 26. Rotary drive to the stem 14 is via worm 34 and worm wheel 32 and is taken from a motor and gear-box arrangement 36. In an alternative arrangement (Fig. 4, not shown) a carbon bush forms a bearing for the end of the heat sink block as well as supplying current thereto.
Patent GB-1308141-A (GB)
Title: Bagging apparatus and method
IPC: B65B43/14
Filed: 1969-02-25
Abstract: 1308141 Carrier Bags A S SMITH and E A BAILEY 22 May 1970 [25 Feb 1969] 9983/69 Heading A4G [Also in Division B8] A carrier bag for use with bagging apparatus (see Division B8) has a preformed finger-hold aperture, 77, in the mouth margin of one panel 68 and spaced holes 79 in the mouth margin of the other panel (69), the material between the holes 79 being rupturable to produce a second fingerhold aperture. The mouth margins each comprise two layers 73, 74 and 75, 76, the spaced holes 79 being provided in one layer 76 of the mouth margin of panels (69) and a finger-hold aperture 78 being provided in the other layer 75. The material between the holes 79 is weakened by a medial slit 80 and perforations (81). One side margin of the bag is doubled and provided with holes 82 to cooperate with side rods in the apparatus. A notch 83 is provided at the top of panel 68 to facilitate opening of the bag by an air jet. Separate marginreinforcing strips, which are respectively apertured and holed and, which may be of a different material to that of the bag, may be fused to the bag. An added strip containing the holes 79 may be situated between the plies of the bag or attached to the bag in register with a finger-hold aperture. The panels 68, (69) may be of different lengths, as shown, or may be of the same length. The bag has a bottom gusset. The bag may be made of plastics material, paper, or a combined plastics and paper material.
Patent GB-1310693-A (GB)
Title: Central heating systems
IPC: F24D3/10
Filed: 1970-06-09
Abstract: 1310693 Central heating systems RICHARD BAXENDALE & SONS Ltd 8 Sept 1971 [9 June 1970] 27780/70 Heading F4U A central heating system 15 includes an expansion tank 10 of closed construction subdivided internally by a diaphragm 11, one side 12 of the tank being connected to the cold water supply tank 14, and the other side 13 to the central heating system, whereby the system pressure is limited to that of the height of the cold water supply tank. In another embodiment of a diaphragm expansion tank, two axially-spaced diaphragms are provided with a spacer block disposed therebetween. This construction ensures effective operation of the tank even with one diaphragm punctured.
Patent GB-1311659-A (GB)
Title: Electrical device substrates
IPC: H01L21/60
Filed: 1969-07-30
Abstract: 1311659 Semi-conductor devices DEFENCE SECRETARY OF STATE FOR 22 July 1970 [30 July 1969] 38241/69 Heading H1K A substrate for a semi-conductor device comprises a matrix of "insulating" material in which are embedded a plurality of rod-like conductive parts extending parallel to one another between the major faces of the substrate, and formed by the directional solidification of a eutectic mixture. The substrate is produced by crystallizing a melt, the materials being selected so that a conductive phase in the form of rods extending parallel to the growing direction is formed in a matrix of a second insulating phase. The conductive rods may comprise GaTi 2 , MoAs, or CrAs in a matrix of GaAs, which is preferably semi-insulating, or NbSi 2 , TaSi 2 , or MoSi 2  in a matrix of Si. As shown, Fig. 3, a substrate 1 having conductive rods 5 in an insulating matrix 7 is produced by cutting a transverse slice from an ingot produced as described above. A semi-conductor device 3 is mounted or deposited (epitaxially or otherwise) on one surface of the substrate and electrical contacts 9 are applied by evaporation on the lower face of the substrate to make connections to parts of the semi-conductor device via appropriate groups of the conductive rods 5.
Patent GB-1314065-A (GB)
Title: Device for moulding sheets of glass-reinforced plastics
IPC: B29C70/22
Filed: 1970-04-09
Abstract: 1314065 Moulding fibre/resin articles; laminates KONSTRUKTORSKOE BJURO MEKHANIZATSII I AVTOMATIZA-TSII SUDOSTROENIA 9 April 1970 16813/70 Headings B5A and B5N Lengths of fibre resin sheet material are laid upon a mould 19 by a dispensing head 4 carried by a carriage 3 reciprocable along a bridge truss 1 itself movable along rails 2 over the mould. The head is rotatable about a vertical axis and may be locked at any desired angle. By appropriately orienting the head and moving the head along the truss and the truss over the mould at the necessary relative speeds using a reduction gear assembly 34 and a series of clutches 32, 44, and 53 the sheet material can be laid in any desired orientation on the mould (see parts a-d of Fig. 4). The dispensing head comprises a valve 20 through which resin is cast on to the surface of the mould. Fibre glass sheets are dispensed from a reel 8 around a roller 18 and under a roller 15 carried cantilever fashion from an axle 17 by levers 16 on to the coated mould and are pressed into the resin  by the roller 15. The valve/dispensing apparatus complex is carried by a vertically reciprocable framework 14 which remains stationary when a flat mould is used but which may be raised  and lowered when a contoured or curved surfaced mould is used. The dispensing head is carried by an axle 5 which is rotated through bevel gear 49. The bevel gear itself rotated by a worm 49 driven through a belt 47 and electromagnetic brake 46 from a motor 45. The head is locked in its desired orientation by electromagnetically controlled stops 50 which engage slots in the dial. In use, longitudinally extending films of release material are deposited side by side on the mould surface by the appropriate movements of the truss and carriage, the head being rotated through 180 degrees at the end of each run along the mould. Subsequently fibre resin sheets are deposited in overlapping side-by-side relation over the release fibre and the whole hardened. First layers of sheets are deposited in the direction shown in Fig. 4a, then successive layers are laid in the directions shown in Figs. 4b, 4c and 4d. Finally the hardened composite sheet thus formed is removed from the mould surface.
Patent GB-1318196-A (GB)
Title: Liquid fuel injection pumps
Inventor: MOWBRAY D
IPC: F02M41/14
Filed: 1969-09-30
Abstract: 1318196 Fuel injection pumps C A V Ltd 11 Sept 1970 [30 Sept 1969] 47970/69 Heading F1A In a fuel injection pump having radial pumping pistons 13 reciprocable in a rotary block 12 by a cam ring 17 angularly adjustable in a cylindrical recess 11, the ring is of insufficient thickness to resist distortion by the pistons 13 whereby the ring distorts into contact with the cylindrical recess 11 and minimises the torque reaction transmitted to a piston 21 for adjusting the ring's position. The co-operating surfaces of the recess and the cam ring are knurled. The piston 21 takes up a position which depends on the output pressure of a pump 30, supplying through a regulator 31, the left hand end of a spool 24 slidable within the piston 21. If the pressure increases the spool 24 shifts to the right uncovering a port 33 in the piston 21 to pump pressure. Thus the left hand end of the piston 21 is pressurized through a passage 32, whereby the piston 21 moves to close the port 33. A subsequent fall in pressure connects the port 32 to a discharge port 34.
Patent GB-1324165-A (GB)
Title: Fastening constructions for rails for wheeled machinery or rolling  stock
IPC: E01B9/34
Filed: 1970-10-22
Abstract: 1324165 Fastening railway rails KINS DEVELOPMENT Ltd 22 Oct 1970 [3 Oct 1969] 48654/69 Heading E1G In a laterally adjustable rail fastening a rail flange 7, which may be seated on a pad 8 on a girder 6, is laterally located by a flange 3 of a plate spring clip whose base 1a has two elongated bolt holes 2 allowing lateral adjustment, the base 1a being integral with a central arched portion 1b whose tip 1c bears on the top of the rail flange. The tip may be ground to suit different rail flanges. The clip shown has a flat base and two upstanding flanges 3. In a modification, Fig. 4 (not shown) the base (4a) is arched upwardly and has a single downturned flange (5) locating the rail.
Patent GB-1332204-A (GB)
Title: Apparatus for wet processing of textile fabrics
IPC: D06B3/28
Filed: 1971-03-20
Abstract: 1332204 Treating endless webs PLATT INTERNATIONAL Ltd 6 March 1972 [20 March 1971] 7535/71 Heading D1L Apparatus for treating endless length of cloth F in rope form comprises a vessel 1 of substantially straight tubular form mounted with its longitudinal axis inclined at an angle of 5-30 to the horizontal, an open-ended conduit 18 provided in the lower part of the vessel 1 at a similar inclination, means comprising a treatment liquid jet (Fig. 4, not shown) at the inlet 19 to the conduit 18 and freely rotatable guide roller 21 for feeding the endless cloth F through the downwardly inclined conduit and back through the vessel in multilooped arrangement to re-enter the conduit and means comprising circulation pump 6, jet throttle 8 and inlet 9 for introducing the treatment liquid under pressure to the inlet 19. As illustrated the vessel 1 preferably has a closable port 2 for loading and unloading the cloth to be treated with the aid of winch 3; inlet 4 and valve 5 for the introduction of compressed air for use when treatment under pressure is required; liquid outlet pipe 10 communicating with pump 6 via filter 12 for liquid circulation; and heat exchanger 7 provided on the outlet side of pump 6. The conduit 18 preferably progressively increases in width and decreases in depth along its length so that its cross-section is square at point A/A and oblong at point B/B (Figs. 2 and 3, not shown), this arrangement facilitating cloth feed back and opening to prevent crushing and creasing. The downstream end of conduit 18 is provided with an upturned portion 20 which has its outlet facing up the vessel. Roller 21 is positioned to allow the level of treatment liquid in the vessel to be set between L 2  when the cloth is totally submerged during treatment and L, when the cloth is allowed to emerge into atmosphere before passing again down conduit 18. Jet pipes 27 may also be provided to direct treatment liquid towards and through perforated baffles 29, 30 to provide a braking action on the cloth F as it exits from its multi-looped arrangement.
Patent GB-1336917-A (GB)
Title: Apparatus for measuring conversion of amplitude modulation to phase modulation
IPC: H04B17/00
Filed: 1971-10-13
Abstract: 1336917 Measuring phase distortion HEWLETTPACKARD Ltd 13 Oct 1971 47552/71 Heading G1U In order to measure the distortion introduced into a signal by a device under test (DUT) 4, which distortion is present in the output signal from the DUT in the form of unwanted phase modulation, a composite signal produced by  amplitude modulating 2 a carrier signal 1 by a sine wave modulation signal 3 is applied to the DUT, the output signal from the DUT has subtracted from it a second composite signal produced by a balanced modulator 5 so that the second composite signal does not include the carrier signal as a component, the second composite signal is adjusted in phase 6 and amplitude 7 until the modulation side-bands present in the first composite signal have been balanced out, this being indicated by an envelope detector 9, and finally any phase modulating prevent in the carrier signal component of the output signal from the DUT is measured by a discriminator 10. Thus effectively an input signal having components f c  and f c   f m  is applied to the DUT, components of frequency fc  fm present in the output signal from the DUT are removed, and any phase modulation suffered by the component fc is measured. This system is said to be particularly useful when the DUT is a limiter, operating typically on a 70 Mc/s FM communication signal.