baber/WOPTO huggingface dataset:
Patent GB-1284318-A (GB)
Title: A device for forming a multi-channel primary group for a carrier frequency transmission system
IPC: H04J1/04
Filed: 1970-08-06
Abstract: 1284318 Frequency division multiplexing CIT-COMPAGNIE INDUSTRIELLE DES TELECOMMUNICATIONS 6 Aug 1970 [8 Aug 1969] 37966/70 Heading H4R In each channel of a multi-channel transmission system the input frequency is modulated with a common frequency F1, a filter passes the resulting common intermediate frequency band and a second modulator modulates the intermediate band with one of a set of carrier frequencies; the carrier frequencies of said set being consecutive multiples of a common basic frequency F0, F1/F0 being expressible as P/Q with P and Q both integers less than 100, substantially half of the channels using inverse modulation and the remainder using direct modulation. The invention can be used to send 16 channels each of 3 KHZ in a 48 KHZ band. In the preferred form, each channel transmits a voice band of 200-3050 HZ which is passed through a band pass filter 1 tuned to this band, modulated at 2 by a fixed frequency 14,850 HZ to produce signals in a band 15,050 to 17,900, passed through a second band pass filter 3 tuned to this band, modulated using direct or inverse modulation and a frequency Fn of a set of thirteen carrier frequencies to produce a transmission band of width slightly less than 3KHZ (e.g. 60À100 to 62À950 KHZ), combined with three adjacent and similarly produced transmission bands in a four resistive input amplifier 6 to produce a group of width less than 12 KHZ and after passing through a group band pass filter 74 combined with three further group bands in a four resistive input amplifier 9 to produce the required 16 channel band. Even numbered channels use normal modulation and the lowest eight carrier frequencies while odd numbered channels use reverse modulation and the highest eight carrier frequencies, the three middle carrier frequencies being used for two channels with different types of modulation. Within each group the carriers frequencies Fn used are outside the range of that group band pass filter 7 1  to 7 4 . The carrier frequencies are 48 to 120 KHZ in increments of 6 KHZ and can be produced by frequency multiplying 6 KHZ. A common oscillator operating at 2376 KHZ is divided by 396 and 160 by frequency divider chains (Fig. 5, not shown) to give the basic frequency 6 KHZ and the common frequency F1 respectively. Integrated circuits may be used for the frequency dividers.
Patent GB-1201373-A (GB)
Title: Compositions of ethylene-propylene polymers
Inventor: SOLDATOS ANTHONY CONSTANTINE
IPC: C08L23/16
Filed: 1967-08-17
Abstract: 1,201,373. Ethylene-propylene polymer compositions; isoprene polymer compositions. UNION CARBIDE CORP. 17 Aug., 1967 [17 Aug., 1966], No. 38033/67. Heading C3P. A composition comprises an ethylene-propylene polymer which is curable to an elastomeric product and an isoprene polymer which is a (1) homopolymer of isoprene; (2) a polymer of isoprene and at least one olefinic comonomer wherein at least 70% by weight is combined isoprene, O (3) a phenolated polymer of (1) or (2) wherein said isoprene polymer may be hydrogenated or halogenated and has a number average molecular weight of 500 to 30,000 and which contains less than 50% by weight of 1,4-addition. Suitable polymers (2) include copolymers of isoprene and butadiene or α-methyl styrene, and terpolymers thereof. Phenols include thiophenols. The ethylene-propylene polymer can be a terpolymer with 1,4-hexadiene. The polymers (1) and (2) are prepared by reacting the monomer or monomer mixture, which may be purified using Al 2 O 3 , in solution in tetrahydrofuran in the presence of lithium butyl at a temperature between 50‹ and 60‹ C. The monomer is preferably added in portions. The polymer can be separated using methanol. The polymers contain about 5% of 1,4-addition product.  Hydrogenated polyisoprene is made by reacting a liquid polyisoprene made as above with hydrogen in the presence of a platinum on charcoal catalyst. Phenolated isoprene polymers are made by reacting the above-produced isoprene polymers with phenols such as p-nonyl phenol, phenol, thiophenol, o-t. -butyl phenol, and p-dodecyl phenol in the presence of a catalySt such as p-toluene sulphonic acid or phenol-BF 3  complex.
Patent GB-1064536-A (GB)
Title: Improvements in and relating to dual material flange bearing liners
Inventor: KINGSBURY GEORGE ROTHWELL
IPC: F16C33/12
Filed: 1965-09-06
Abstract: 1,064,536. Making composite strip material. CLEVITE CORPORATION. Sept. 6, 1965 [Sept. 17, 1964 (2)], No. 38035/65. Heading B3A. [Also in Division F2] A bearing comprises two equal parts each having a semi-cylindrical portion (10), Fig. 1 (not shown), the inner bearing surface of which has a layer (22), Fig. 2 (not shown), of strong high-load carrying bearing material, such as bronze, adhered thereto and may have the layer (22) provided with a thin layer (23) of white metal thereon; and at least one flange portion (11), to which is adhered a conformable layer (21) of white metal, for example, with or without a thin layer of bronze (19) between the layer (21) and the flange (11). Stripmaterial for the bearing is produced by applying a layer (22) bearing material to a length of steel strip, working the layer (22), Fig. 4 (not shown), so that it has a pre-determined thickness over the area of the strip which forms the bearing surface of the portion (10) and has a lesser thickness over the area (or areas) of the strip which forms the flange (or flanges). The layer (22) may be cast across the steel strips and be partly removed, by milling for example, at the flange-forming areas of the strip; may be sintered and rolled, may be bonded and rolled; and may be confined to the area of the strip which forms the bearing surface (10). White metal may be cast across the complete area of the machined strip so as to provide a thin layer over the layer (22) and a thicker layer over the flange area (or areas); and may be confined to the area of the strip which forms the flange (or flanges) (11). The strip is cut into blanks which are then roll-formed, for example, into. bearings.
Patent GB-1518370-A (GB)
Title: Endless-belt filters
IPC: B01D33/04
Filed: 1976-09-15
Abstract: 1518370 Endless belt filter NORDENGREN PATENTER AB 15 Sept 1976 [16 Sept 1975] 38113/76 Heading BID In an endless belt filter apparatus wherein a filter cloth is supported on a perforated endless carrier belt 2, e.g. of vulcanised rubber with internal cord reinforcement, the belt passes over suction boxes 1 each in the form of a channel provided with side walls a surface of the upper edge of which sealingly abuts the belt undersurface; the belt is supported by support bars 4 on either side of the suction box; each suction box is arranged on a pivotable arm 10 by means of which it may be swung away from the operating position to a position whereat it may be inspected and cleaned; and the pivotable arm and one of the support bars are provided with co-operating stop means 16 to correctly positioning the box in the working position. The arm may be held in the working position by means of a pivoted bolt and associated nut 12, 13 positioned in a notch in the arm. A magnet 14 against which the bolt may be swung, holds the bolt when the arm 10 is pivoted, e.g. by hydraulic cylinder 15. The support bars 4 may have a channel in their upper surface to which water may be supplied to lubricate belt movement over the support bars. Such a construction forms the subject of Specification 1518369. The belt may have upstanding edge portions, transverse drainage ribs and a row of perforations along its axis. The belt is tensioned over rollers and the belt and cloth may be separated on the return path for separate cleaning by water sprays. The apparatus may be used for filtration of gypsum from phosphoric acid during manufacture of the latter.
Patent GB-1520212-A (GB)
Title: Internal structure for pressure vessel of a nuclear reactor
IPC: G21C13/087
Filed: 1976-09-17
Abstract: 1520212 Testing pressure vessels COMMISSARIAT A L'ENERGIE ATOMIQUE 17 Sept 1976 [2 Oct 1975] 38543/76 Heading G6C A nuclear reactor comprises a vertical pressure vessel 2, a core basket 22 supported within the vessel by means of a support ring 28 connected to the basket by radial struts 30 and resting on an annular shoulder 26 formed in the internal wall of the vessel, a reactor core 25 resting on a bottom end wall 24 of the basket, and guide means 44 for a test instrument 46 on the external wall of the basket. The core basket has an axial pivot pin 40 at its lower end engaging a recess 42 in the vessel and at its upper end is provided with a grid 34 supported by a ring 36 connected thereto by radial struts 38. The guide means 44 consists of a vertical rail 44 which carries a rack engaged by a pinion on an ultrasonic test instrument 46. To test the welds 10, 12, the closure head 14 of the vessel and the grid 34 are removed, and a machine 50 is bolted to the top of the vessel and coupled to the basket by means of yokes 62 and pins 64 engaging the struts 30. The yokes are carried by a vertical rod 70 mounted on a support 76 which may be raised by a rack and pinion 86 to lift the support ring 28 out of engagement with the shoulder 26. The instrument 46 is positioned at the level of one of the welds, and rod 70 and the basket are then rotated by means of motor 78 to scan the length of the weld. The coolant duct 90, Fig. 4 (not shown) is disconnectible from the basket to permit the rotation. In the alternative embodiment of Fig. 5, the basket remains stationary, and the instrument 46 is mounted on vertical guide rod 124 which is mounted on rails 120, 126, for movement around the basket.
Patent GB-1085796-A (GB)
Title: Improvements in or relating to transformers
Inventor: THEAKSTON JOHN HERBERT
IPC: H03H7/38
Filed: 1963-10-01
Abstract: 1,085,796. Aerial couplings. ASSOCIATED AERIALS Ltd. Oct. 1, 1964 [Oct. 1, 1963], No. 38590/63. Heading H4A. A balun for connecting a coaxial cable to a balanced aerial comprises an insulating -housing 11 in which the ends of a folded dipole or other aerial 10 are secured by means of terminals 12, 12a, and which contains a conductive former 15 secured by means of a terminal 13. The former 15 is wound with an insulated conductor 16, which may have an effective length of a halfwavelength at the mean working frequency of the aerial, and be disposed as a bifilar non- inductive winding, its ends being connected, to the terminals 12, 12a. The terminal 13 also carries a clamp 14, and may carry a metal shroud 17 disposed around the former 15 with its winding 16. The outer conductor of a coaxial cable is secured in the clamp 14 and its centre conductor is connected to the terminal 12. The operation of the balanced aerial 10 is stated to be unaffected if other radiators are connected to the former 15.
Patent GB-1536293-A (GB)
Title: Temperature monitor for semiconductor junction
IPC: G01R31/26
Filed: 1976-09-17
Abstract: 1536293 Monitoring temperature of semiconductor devices CANADIAN GENERAL ELECTRIC CO Ltd 17 Sept 1976 [3 Dec 1975]  38667/76 Heading G1N [Also in Division H2]  A circuit for monitoring the temperature of a semi-conductor junction produces voltage signals V 3 , V 4 , V 5  representing respectively the temperature difference between junction and heat sink, the temperature difference between heat sink and ambient, and ambient temperature and sums them to produce a signal representing junction temperature. Analogue circuit 12 receives a voltage V 1  proportional to average current through the semiconductor junction and by successive conduction of Zener diodes 24 and 27 simulates the relationship between average power dissipated at the junction and average current therethrough. Analogue circuits V 3  and V 4  receive the voltage V2, proportional to average power dissipated, and provide outputs V 3 , V 4  respectively which vary with time according to the Formula V 2 .A.[1-e<SP>-t/RC</SP> ] where A is the steady state gain of the circuit and R and C are the feedback resistor and capacitor respectively. Temperature sensor 15 includes a thermistor 16.
Patent GB-358817-A (GB)
Title: Improvements in roller bearings
IPC: F16C33/37
Filed: 1930-12-23
Abstract: 358,817. Roller bearings. TAYLOR, G. W., 11, Sessions Street, Wellesley, Massachusetts, U.S.A. Dec. 23, 1930, No. 38674. [Class 12 (i).] Rollers 17 running on cylindrical race tracks 14, 15, on rings 1, 2, are spaced by pairs of rollers 22 the projecting ends of the latter rollers engaging bearing faces of the rollers 17 which are free from contact with the race tracks 14, 15. For this purpose the tracks 14, 15 are recessed at 7, 16. The spacing rollers 22 have bevelled ribs 24 and each pair is encircled by a ring 23. The main rollers 17 are of dumbbell shape and the edges are chamfered to correspond with bevelled parts 6, 12 on the race rings so that small end thrusts can be taken up. As shown the race rings are formed of three rings 9, 10, 11 held together by a sleeve 13. In a modification the outer race ring is in one piece and the inner ring is formed of two parts.
Patent GB-1015120-A (GB)
Title: Safety control apparatus
IPC: F16P3/18
Filed: 1963-10-02
Abstract: 1,015,120. Machinery safety devices; valves. E. HERION. Oct. 2, 1963, No. 38747/63. Headings F2J and F2V. A machine actuated by fluid pressure, e.g. a press, is operated only when two valves admitting pressure fluid are opened substantially simultaneously. Each of two valve chambers A, interconnected by a passage 7, has a closure member 6 movable from a position allowing high-pressure fluid from a supply duct 2 through inlets 5 and a duct 3 to operate the machine (not shown) to a position opening the duct 3 through an outlet 8 to exhaust ducts 4. Switches 12, 13 control solenoid valves 10, 9 which when not energized allow high-pressure fluid from duct 2 to pass through inlets 32 into cylinders 11, causing pistons 15 to hold the closure members 6 in the position closing the inlets 5. When energized, the valves 9, 10 allow fluid from the cylinders 11 to exhaust through outlets in the tops of the valves 9, 10, and close the inlets 32, allowing the closure members 6 to move upwards. Hollow piston rods 18 and lines 17 connect the cylinders 11 to the two sides of a double piston 16 at a pressure comparing device. Ball valves 22 in the piston rods 18 are opened by adjustable rods 23 when the closure members 6 near the ends of their strokes, so that if only one of the valves 9, 10 is operated, the unequal pressures in the cylinders 11 will displace the piston 16 from its centrally biased position to an extreme position in which a switch 31 is opened to de-energize the valves 9, 10. In Fig. 3 (not shown) the pressure comparing device acts directly on a valve in the supply duct 2 to shut off the supply of high-pressure fluid. Reference has been directed by the Comptroller to Specification 940,869.
Patent GB-1390117-A (GB)
Title: Explosive slurries
IPC: C12P19/06
Filed: 1972-08-21
Abstract: 1390117 Explosive compositions GENERAL MILLS CHEMICALS Inc 21 Aug 1972 [27 Aug 1971] 38921/72 Heading C1D A gelled explosive slurry comprises a fuel, a gelling agent comprising a blend of locust bean gum and xanthomonas gum, and a solvent for the gum blend. The fuel may be ammonium nitrate or perchlorate, or the nitrate of potassium, sodium, or calcium. The composition may also include a sensitizer, for example Al, TNT, cyclonite, nitrocellulose, or nitroglycerine. The glucuronic acid groups of the xanthomanas gum are preferably neutralized with Na and K ions, Na ions being in the larger amount. In examples slurries are desinted containing ammonium nitrate, sodium nitrate, water, Al flakes, together with the mixture of gums. The slurries are suitable for use immersed in water, being waterproof and insensitive to pH changes. Reference has been directed by the Comptroller to Specification 1,304,500.
Patent GB-1504289-A (GB)
Title: Surface acoustic wave composite transducer
IPC: H03H9/64
Filed: 1975-08-22
Abstract: 1504289 Surface wave devices PLESSEY CO Ltd 22 Aug 1975 [7 Sept 1974] 39154/74 Heading H3U A surface wave composite transducer for use in filter devices comprises a multistrip coupler 8 and two interdigital transducers R, I, each having uniform finger spacing, the transducers being connected in parallel and positioned equi-distantly from the coupler. The overlap functions of the transducers R, I respectively represent the real and imaginary parts of a desired impulse response function for the composite transducer. The coupler comprises aluminium strips and is preferably a 3 dB coupler. To form a filter device, a uniform finger-overlap output transducer may be provided in track C. Alternatively a further multistrip coupler across one of the output tracks of the coupler, couples surface waves to a variableoverlap output transducer. As shown in Fig. 6A a filter device may comprise two composite transducers. Bulk wave signals between R 1 , R 2  may be suppressed by providing an additional multistrip coupler (16, Fig. 6b, not shown) between the composite transducers, so that couplers 12, 14 no longer overlap.
Patent GB-1481539-A (GB)
Title: Constraint control for processes with equipment limitations
IPC: G05B9/00
Filed: 1974-09-11
Abstract: 1481539 Automatic process control EXXON RESEARCH & ENG CO 11 Sept 1974 [3 Dec 1973] 39632/74 Addition to 1420671 Heading G3R In a control system as described and claimed in the parent Specification, when the value of a variable reaches a hard constraint, i.e. one which cannot be exceeded, the actual deviation of the variable from its desired value is augmented by a quantity dependent on the deviation of a related variable from its target value. As shown, the feedrate to a distillation column 10 is adjusted by a constraint controller 29 in response to various parameter measurements, as described in Specification No. 1420671. In particular, the position of a valve TRCV in a reflux line 20 is input to controller 29 as a signal TME. The target value for the valve position is close to the fully open position. The setting of the valve is determined by the temperature of the overhead line 12 sensed by a device TRC 27, and under certain conditions, the valve TRCV may be fully opened, thus reaching a hard constraint, so that the actual deviation of the valve position from its target is less than that which represents the true conditions which effectively demand that the valve be more than fully opened. Under these conditions, the signal T ME  fed to the controller 29 is augmented by a signal proportional to the difference between actual sensed temperature T MP  and a set point temperature T SP . In a modification, Fig. 2 (not shown), the parameter concerned is the position of a valve in the fuel feed to input furance 17. Another embodiment, Fig. 3 (not shown), is concerned with a compressor control system in which the compressor speed is subject to a maximum limit representing a hard constraint.
Patent GB-1367911-A (GB)
Title: Apparatus for demagnetizing a magnetizable object
IPC: H01F13/00
Filed: 1971-08-24
Abstract: 1367911 Demagnetizing circuits A K LITTWIN 24 Aug 1971 [1 Sept 1970] 39665/71 Heading H2H A circuit for demagnetizing a chuck 10 of a machine tool comprises a first condenser 24 which is rapidly charged to and maintained at a constant predetermined maximum voltage, a second condenser 26 which is charged at a slower rate from a voltage below the maximum voltage of the first condenser to a predetermined voltage above that of the first condenser, circuit means for successively supplying current of a first polarity and current of an opposed polarity to the chuck and circuit means for reducing the current supplied to the chuck during successive reversals of polarity. With the switch 108 in the "DEMAG" position and the switches 20, 22 closed, condensers 24, 26 commence to charge, the condenser 24 quickly reaching its maximum voltage and switching on a transistor 64 which triggers a thyristor 70 so that current from the secondary winding 106S 1 of a mains transformer 106 flows through the primary winding 140P of a transformer 140. The secondary winding 140S is therefore energized to switch on a transistor 144 and since thyristors 154, 156 are energized during alternate half cycles of the mains supply, current is supplied to primary windings 84P, 86P during successive half cycles. Secondary windings 84S, 86S are energized and switch on thyristors 96, 98 to allow current of a first polarity to flow through the chuck 10 from the primary winding 106P. Eventually the charge on condenser 26 reaches a value sufficient to switch on a transistor 66 thereby turning off the transistor 64 and triggering a thyristor 68. The primary winding 138P and the secondary winding 138S are therefore energized. A transistor 142 is switched on and, via the conductive thyristors 154, 156, allows current to flow through the primary windings 74P, 76P which energize secondary windings 74S, 76S to trigger thyristors 92, 94, thus supplying current of an opposed polarity to the chuck 10. These polarity reversals occur repeatedly as the condenser 26 charges and discharges. A circuit including a capacitor 186 and transistors 162, 166 enables the amplitude of the demagnetizing current during successive polarity reversals to be gradually decreased. The capacitor 186 is initially fully charged via a transistor 166 which is conductive when the switch 108 is in the "ON" position, i.e. the position in which the switch 108a renders the condenser 26 ineffective so that only a single polarity magnetizing current is fed to the chuck. With the switch 108 in the "DEMAG" position, the transistor 166 is switched off and the decreasing charge on the capacitor 186 slowly increases the conduction of the transistor 166 thus shunting away some of the current fed to the windings 74P, 76P, 84P, 86P and causing the thyristors 92-98 to be triggered progressively later in each half cycle.
Patent GB-1428507-A (GB)
Title: Upholstered part of a chair or the like
IPC: A47C31/02
Filed: 1973-08-21
Abstract: 1428507 Securing upholstery K G NYSTROM 21 Aug 1973 [25 Aug 1972] 39671/73 Heading A4M An upholstered seat or backrest comprises a rigid base 1 or 1a with a downwardly extending peripheral flange 5 or 5a, a cushion 2 or 2a on the base, and a cover 3 or 3a overlying the cushion and having its edge secured to a fastening strip 4 or 4a engaged with the flange to secure the cover, the strip being of flexible resilient material and of uniform cross-section throughout its length and including a first portion 6 or 6a which engages the flange such that it requires to be resiliently deformed to disengage it, and a second portion 7 or 7a in the form of a web which extends upwardly on the outer side of the flange, the web being connected below the lower edge of the flange to a lower edge region of the first portion 6 or 6a and being readily deflectable away from the first portion so that when the web deflects in use due to loading of the cushion the first portion does not disengage the flange. In one embodiment, Fig. 1, the first portion 6 is generally U-shaped to receive the flange 5 and an extension 9 of one limb of the U overlies the edge of the base 1. In another embodiment, Fig. 2, an enlargement 11a along the edge of one limb of the first portion 6a has a snap engagement over a shoulder 12a on the flange 5a. In a modification Fig. 3 (not shown) of the Fig. 2 embodiment, the first portion (6b) does not include a limb disposed outside the flange (5b) and the enlargement (11b) additionally engages a shoulder (13b) on the underside of the base (1b),