baber/WOPTO huggingface dataset:
Patent GB-1246140-A (GB)
Title: Improvements in or relating to high efficiency transmitters
Inventor: SWANSON HILMER IRVIN
IPC: H03C1/16
Filed: 1968-10-25
Abstract: 1,246,140. Radio transmitting systems; pulse modulation circuits; transistor amplifying circuits. HARRIS-INTERTYPE CORP.. 25 Oct., 1968, No. 50860/68. Headings H3T and H4L. In a system for amplitude modulating a carrier wave, the modulating signal is converted into width modulated pulses which are amplified and demodulated prior to modulating the carrier wave. This enables the isolating transformer normally included between the audio amplifier and the R.F. modulating stage to be eliminated with consequent reduction of cost and weight. The modulating signal is supplied to terminals 17, 18 and a square wave reference signal is supplied to terminals 15, 16; the square wave being converted to a peaked triangular wave, Fig. 3 (not shown), by capacitor 23 cooperating with diodes 27, 30. The triangular wave and the modulating signal are compared at 20 and when the modulating signal exceeds the triangular wave a transistor 32 is cut off and a transistor 33 is driven into saturation, the transistor 33 being cut off and transistor 32 saturated when the triangular wave exceeds the modulating signal. The resulting duration modulated pulses are supplied via a Zener diode 64 to an amplifier 66 whose output is supplied via Zener diodes 76, 77 to an amplifier 79 followed by a power amplifier 99 which functions as a switch. A filter circuit 13 recovers the audio signal from the modulated pulse train and this signal is supplied to the cathode of the R.F. modulator valve 107 receiving R.F. oscillations via lead 110. Stray capacitance between the anode and cathode of valve 99 introduces distortion with narrow width pulse signals and to minimize this distortion the pulse signal is predistorted by amplitude modulation introduced by means of a filter consisting of inductor 128 and capacitor 129 in the anode circuit of amplifier 66.
Patent GB-1129767-A (GB)
Title: Class b transistor signal amplifier
IPC: H03F3/30
Filed: 1966-11-14
Abstract: 1,129,767. Transistor Class B amplifiers. GENERAL ELECTRIC CO. 14 Nov., 1966 [3 Jan., 1966], No. 50867/66. Heading H3T. In a Class B signal amplifier, having two transistors Q10, Q11 (Fig. 4) connected in series and a driver transistor Q9, the collector of Q9 is connected to the base of the transistor Q10 and to its emitter via a diode D2 and the emitter of Q9 is connected to the base of transistor Q11 and signal input means is connected to the base of the transistor Q9 such that Q9 is operative on one half cycle of the applied input signal as a common emitter amplifier to drive the transistor Q10 as a common collector amplifier, and as a common collector amplifier on alternate half-cycles of the input signal to drive the transistor Q11 as a common emitter amplifier, the output from the amplifier being taken from a terminal connected to the collector of Q11 and emitter of Q10. Diode D2 prevents the collector of Q9 from swinging far below the collector of Q11 so permitting maximum drive to Q11. Negative feedback is supplied from the output of the amplifier via a resistor R9 to an input transistor Q8, the feedback can alternatively be obtained from a tapping on a potential divider (R15, R16, Fig. 6, not shown) connected across the output. A diode (D4) filter may replace the resistor R7 (Fig. 5, not shown). The above circuits may alternatively use PNP transistors and each transistor could be replaced by a pair of transistors (Figs. 2 and 3, not shown). In a modified amplifier (Fig. 8) the input impedance of the amplifier may be raised by bootstrapping the base of a transistor Q20 to its emitter via a capacitor C9 and full drive of the output transistor Q24 may be achieved by bootstrapping via C10, this bootstrapping being limited by a resistor R25. Positive feedback through the power supply is minimized by returning the collector of the transistor Q20 to the resistor R25 instead of back to the supply so as to provide negative feedback to Q20. Additional A.C. and D.C. feedback paths are provided via resistors R26, R27; capacitor C9 and resistor R19; resistors R21, R22, R28; transistor Q21; resistors R24, R23, R20 and capacitor C10 and resistor R20. The amplifier circuit is supplied from an A.C. supply via a rectifier 18. Temperature effects are compensated by forming the amplifier circuit in integrated form. In a still further arrangement (Fig. 9, not shown), using separate components temperature compensation is provided by a diode (D8) in the D.C. feedback network (R34, R36).
Patent GB-1365700-A (GB)
Title: Treatment of a sulphite- and or bisulphite-containing aqueous stream to selectively produce elemental sulphur
IPC: C01B17/06
Filed: 1971-11-04
Abstract: 1365700 Production of sulphur UNIVERSAL OIL PRODUCTS CO 4 Nov 1971 [5 Nov 1970] 51305/71 Headings C1A and C1C Sulphur is produced from the sulphite and/or bisulphite contained in an aqueous stream by (i) contacting with a reducing agent selected from finely divided sulfur, a polysulfide compound, a water soluble sulfide compound or mixtures thereof, to form a thiosulfate compound; (ii) reacting a portion of the effluent stream from (i) with a reducing compound selected from carbon monoxide, hydrogen and mixtures thereof to produce a sulfide containing effluent stream; (iii) reacting the remaining portion of the effluent stream from (i) with at least a portion of the effluent stream from (ii) to produce a polysulfide containing effluent stream; (iv) decomposing at least a portion of the effluent stream from (iii) by heating or the addition of a strong acid, to form elemental sulfur, hydrogen sulphide and a substantially sulfate free treated water stream. The sulfite in the aqueous effluent is preferably ammonium, sodium, potassium, or magnesium sulfite or bisulfite.
Patent GB-1283919-A (GB)
Title: Coaxial pipes with couplings
Inventor: POPE JOSEPH ALBERT
IPC: F16L53/32
Filed: 1968-10-30
Abstract: 1283919 Coaxial pipes; pipe couplings MIRRLEES BLACKSTONE Ltd 24 Oct 1969 [30 Oct 1968] 51351/68 Headings F2G and F2P [Also in Division G1] The inner and outer tubes of a coaxial pipe are spaced by a relatively rigid helix, so that fluid can flow in the inner and/or outer tubes. Couplings may be fitted to the pipe ends. A tube for conveying fluid under high pressure, e.g. to a fuel injection engine, comprises a thick-walled inner tube 10, separated by a helical metal spring 11 from outer tube 12, thus allowing the pipe to be bent and clamped without collapsing the outer tube or disturbing the coaxial relationship. The annular space may also contain an electrical resistance wire 30 or hot or cold fluid, to control the temperature of the inner tube. The pipe is coupled to, e.g., a fuel pump discharge union 16 by a connector 14, which has a threaded bore 15 adapted to receive the union 16, and a groove 18 containing an 0-ring seal 19, alternatively, groove 18 may be cut in union 16. The inner tube 10 protrudes sufficiently from outer tube 12 to seat within the bore of union 16, a seal being made by collar 21. Counterbore 22 accommodates outer tube 12 and a high pressure seal comprising ring 24, welded to pipe 12 using welding material 25, compressible packing rings 26 and externally flanged collar 27. The seal is compressed by screwing internally threaded and internally flanged sleeve 29 on to connector 14. A channel 23 may connect counter bore 22 to groove 20 which is in turn connected to a drain or reservoir as indicated schematically by arrow D, so that any fluid leaking to outer tube 12 from inner tube 11 is removed. The reservoir may be provided with a float which actuates an alarm when moved by the collection of fluid from the outer tube. Alternatively, outer tube 12 may contain a fluid under low pressure which, will be increased by any leakage from the inner tube and this increase in pressure can be used to actuate a pressure sensitive alarm system. Where the pipe is only required to transport fluids at moderate pressure the seal between the outer tube and the connector may be made by a simple 0-ring (55, Fig. 2, not shown).
Patent GB-1283430-A (GB)
Title: Improved dry-grinding system and method
Inventor: ROWLAND CHESTER ARCHIBALD JR
IPC: C22B1/14
Filed: 1970-10-30
Abstract: 1283430 Comminuting ores; ball milling ALLIS-CHALMERS MFG CO 30 Oct 1970 [6 Nov 1969] 51718/70 Heading B2A A milling system comprises a primary separator 1 having a coarse outlet connected by a conveyor 10 to a rotary dryer 6 whose outlet is in turn connected by a conveyor 15 to a mill 12. The mill output is delivered by a third conveyor, and the fines of the separator 1 are added to the material, without drying or grinding by a fourth conveyor 18. This material is cooler than the dried and milled fraction and by mixing it with the hot material a cooler product results which prevents excessive steaming when it is wetted at 24 preparatory to balling in a balling drum (not shown). As described, the dryer output is further separated at 27, the tines fraction by passing the mill. The coarse fraction is concentrated at 32, the tailings being delivered as waste at 33 and the values, e.g. Iron ore, only being supplied to the mill. Water is added from a source 22.
Patent GB-1114378-A (GB)
Title: Improvements in or relating to electric blankets
Inventor: TADMAN DONALD HENRY
IPC: H05B3/34
Filed: 1965-12-07
Abstract: 1,114,378. Electric blanket. E. K. COLE Ltd. 6 Dec., 1966 [7 Dec.,1965], No. 51794/65. Heading H5H. The heating element 4 of a blanket is arranged in a plurality of parallel ducta formed by stitching together layers of the blanket. The loops at the ends of each straight portion are held in place by retaining bands 5, e.g. adhesive bands.
Patent GB-1168998-A (GB)
Title: Speed Responsive Governor Devices
Inventor: MOWBRAY DORIAN FARRAR
IPC: G05D13/00
Filed: 1965-12-09
Abstract: 1,168,998. Speed governors. JOSEPH LUCAS (INDUSTRIES) Ltd. Feb. 3, 1967 [Dec. 9, 1965], No. 52221/65. Heading G3B. A device for controlling the flow of fluid in accordance with speed changes in a rotary apparatus comprises a member 21 angularly movable with respect to a body 12 by an amount dependent upon the speed of the apparatus, the angularly movable member and the body having respective formations defining an opening 27 which varies with the position of the angularly movable member, the member 21 being moved by a rotating sleeve 15 a copper disc 19 and a magnet 20 and being restrained by a torsion spring 22. The casing 10 has a fuel inlet 11. A screwed connection (not shown) determines the initial setting of the member 21. Specification 1,168,999 is referred to.
Patent GB-1495965-A (GB)
Title: Dispensing closure
IPC: B65D47/08
Filed: 1974-12-05
Abstract: 1495965 Dispensing closure with pivoted cover EDWARD JOHNSON TOWNS & ASSOCIATES 5 Dec 1974 [6 Dec 1973] 52624/74 Heading B8T A dispensing closure comprises a skirt 11, Fig. 2, whose upper end has an apertured, stepped recessed panel 14, 15 surrounded by an annular rim 13 to which a top cover wall 21 is hinged. The top cover wall has lugs 25 which engage apertures 17 in the upper step 15 of the panel and a tab 31 which snaps into a recess 33 in the annular rim 13. The rim 13 has a recess 41, Fig. 1 to accommodate the cap's hinge 43 upon closure. To open the closure the cap is depressed immediately above the lower step 14 of the panel whereupon, with a rib 37 on the upper step 15 acting as a fulcrum, the cap bends about a hinge 27 such that the tab 31 and lugs 25 disengage from the recess 33 and apertures 17. The top cover wall is retained in the open position by engagement of diametrical ribs 29, 39.  In a modification the upper step 15 is divided into two quadrants, one having small apertures, the other having a single large quadrant shaped hole. Both types of hole are engaged by corresponding lugs on the cap unless the quadrant shaped hole is as large as its containing quadrant in which case the corresponding lug can be omitted. The skirt 11 may be snap fitted or screwed to a vessel.
Patent GB-1179249-A (GB)
Title: Dryer for Web or Cut Sheet Material.
Inventor: PULLEN PETER
IPC: G03D15/02
Filed: 1966-11-25
Abstract: 1,179,249. Drying webs or sheets. ILFORD Ltd. 21 Feb., 1968 [25 Nov., 1966], No. 52838/66. Heading F4G. [Also in Division G2] In an apparatus for drying webs or sheets (e.g. photographic material) the web 3 is conveyed by pairs of rollers 4 and guided by metal wires or strips 6, 7 between air conduits 1 extending across the web path, which conduits are provided with one or more longitudinal slots 2 and are supplied with air from both ends by air supply manifolds 8, 9 which extend longitudinally of the web path. The air is supplied to the manifolds by fan 12 via heater 18 and the air issuing from slots 2 is subsequently returned to fan 12 for recirculation via exit passages 15 between the conduits 1 and chambers 16, 17. Fresh air is drawn into the circulating air via inlet 10 and outlet 11 of the dryer and some of the circulating air is exhausted via valve 19. The rollers may be driven by a friction band or chain and sprocket drive. The wires 6, 7 may be coated with a non-stick material.
Patent GB-1085770-A (GB)
Title: Improvements relating to methods and devices for recording the rate of a watch movement
IPC: G04D7/12
Filed: 1965-12-14
Abstract: 1,085,770. Recording-apparatus. PORTESCAP, LE PORTE-ECHAPPEMENT UNIVERSEL S. A. Dec.14, 1965 [Jan.13, 1965], No.52957/65. Heading G1J. [Also in Division G3] In using a chrono-comparator Cr to record the rate of a timepiece movement, the record is interrupted intermittently through switching apparatus P, controlled by amplitude measuring apparatus G, whenever a binary counter Cbi signifies that the amplitude of the oscillating member of the movement has consistently fallen below a predetermined value. An electronic amplifier in the apparatus G transforms into pulses Id, Ic the "unlocking" and "drop" noises of the movement of a watch placed on a microphone M. Bi-stable and mono-stable multivibrator circuits Bo, To simultaneously produce pulses of, for example, -12V. upon receipt of a pulse Id, the former terminating upon the arrival of a pulse Ic and the latter being inverted at N. A logical circuit E 1  permits a negative pulse Ii to pass to the counter Cbi only when the duration of a standard pulse To is shorter than the interval between the pulses Id and Ic, which occurs only when the amplitude of the oscillating member is below the predetermined value. The pulses I i  are counted, and, for example, each eighth pulse triggers a circuit Ti which through the electronic switch circuit P blocks the line from the microphone M to the chrono-comparator Cr, for, for example, one or two seconds to stop the recording of the rate.
Patent GB-1083014-A (GB)
Title: A method of and apparatus for identifying mechanical parts
Inventor: RIDEAU JEAN
IPC: G21C17/00
Filed: 1964-12-31
Abstract: 1,083,014. Determining shapes. COMMISSARIAT A L'ENERGIE ATOMIQUE. Dec. 31, 1964 [Dec. 31, 1963], No. 53090/64. Heading G1M. A method and apparatus for identifying mechanical parts comprising applying against the part 1 to be identified the openings of tubular members 4 whose relative positions are known, introducing a fluid under pressure into said tubular members or creating an underpressure within said tubular members determining the tubular members (4b in Fig. 1) in which fluid freely flows either from the tubular members or thereinto and those which are closed (4a and c in Fig. 1) by contact with the part 1, and deducing therefrom the identity of said part. In the embodiment described the parts to be identified have annular grooves 16 whose number position vary with the said part. The tubular members are formed by channels 4 bored in a control head 2, the channels being connected to a fluid conduit 6 and each channel also being connected to a manometer 10 which gives two indications i. e. whether the outlet is blocked or open. As shown three channels are used, one 4b in the centre of the head 2, one 4a at the periphery and one 4c half-way between. Two further channels 4d, 4e Fig. 2 (not shown) may be provided for determining the shape of the part 1. In a further embodiment Fig. 7 (not shown) a series of heads are provided which are kept in contact with the parts under test by springs 36.
Patent GB-1487627-A (GB)
Title: Multiple-frequency code receiver
IPC: H04M11/06
Filed: 1974-12-09
Abstract: 1487627 Automatic exchange systems PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 9 Dec 1974 [12 Dec 1973] 53123/74 Heading H4K A voice frequency receiver comprises a sampling circuit for supplying digital representations of a multifrequency signal to a computer which is programmed to determine the values of two frequencies in the signal based on the sum and difference values of the two frequencies. The receiver may be used in a compelled register signalling system utilizing the European method of two-out-of-six high forward frequencies and two-out-of-six low return frequencies, or in the U.S. two-out-of-six subscriber multifrequency signalling system. The Specification provides considerable detail on the methods to be used for avoiding ambiguity in resolving the signals. Frequency is calculated in terms of the number of samples between calculated zero-crossings of the sum and difference (beat) signals.
Patent GB-1138677-A (GB)
Title: Hairspring collet for a timepiece
IPC: G04B17/34
Filed: 1967-11-23
Abstract: 1,138,677. Clocks and watches. DAINI SEIKOSHA K. K. Nov. 23,1967 [NOV. 29,1966], No. 53347/67. Heading G3T. A hairspring collet for a.timepiece comprises a body 9, 10 having one face formed with an aperture 6 and a groove 7 for receiving, respectively, the balance staff and one end of the hairspring, said face also being formed with at least two slots 5 which do not extend to the opposite face of the collet. A lower body portion 10 is of greater diameter plan an upper portion 9, but may be of substantially the same diameter. The aperture 6 may be of constant cross-section, or taper upwardly, or comprise two portions of uniform but differing cross-sectional area.
Patent GB-1160080-A (GB)
Title: Winning Apparatus for use in Mines
Inventor: PLASSAT JEAN EMILE
IPC: E21C25/56
Filed: 1966-12-01
Abstract: 1,160,080. Mineral - mining installations. ATELIERS DE CONSTRUCTIONS ELECTRIQUE DE CHARLEROI. 1 Dec., 1966 [1 Dec., 1965; 13 June, 1966 (2)], No. 53743/66. Heading E1F. A mineral-mining and loading installation involves a chain-reciprocable train of hinged together .pallets 2, 3 of which some so pivotally carry cutter elements 4 that the elements will attack a mineral face during passage of the train to and fro along the face whilst both the terminal pallets 2 have at the free ends thereof scraper edges for picking up mined mineral from the floor at the face and one of these terminal pallets has a, pivoted plate 13 that allows of the movement of mineral through the pallet in a direction away from the scraping edge thereof.
Patent GB-1176439-A (GB)
Title: Improvements in or relating to apparatus for Drawing an Anchor Head on a Tensioned Rod or Cable
IPC: E04G21/12
Filed: 1968-11-13
Abstract: 1,176,439. Tensloning cables. SOC. DES GRANDS TRAVAUX DE MARSEILLE, S.A. 13 Nov., 1968 [26 Dec., 1967], No. 53847/68. Heading B8B. An hydraulic apparatus for tensioning and drawing an anchor head on rods or cables 1 embedded in and extending from a structure or block 2 comprises a cylinder 4 through which the cables extend and in which a hollow pistonrod 13 having pistons 8 and 9 is longitudinally movable to tension the cables via a cable clamping device 25, 26 and to draw an anchor head out of a socket 3 via die 14. In operation, fluid pressure is supplied to a chamber 7 to move the piston 9 to the right, this causing the clamp 25, 26 to grip the cables as it is moved to the right via the piston-rod 13, a distance-piece 28 and transverse keys 18, 19 extending through the cylinder 4 and movable in longitudinal slots therein. The die 14, socket 3 and a punch 17 slidable within the rod 13 also move to the right. The tension is maintained in the cables once the pressure is released from the chamber 7, by a nut 42 engaging threads 27 on the device 25, 26 and abutting a nut 33 secured in the end of the cylinder 4. Before starting the drawing operation, a chamber 6 is pressurized and piston 8 moves the rod 13 and die 14 back to its original position, and after the socket 3 and punch 17 have been returned to their original positions the keys 18, 19 are withdrawn and reinserted in the slots at the other side of the distance piece 28 which is moved to the right into abutment with a piston 36 (Fig. 3, not shown). The socket 3 can now be drawn into an anchor head by the die 14 as pressure is again supplied to move the piston 9, its rod 13 and the die 14 to the right, the punch 17 resisting movement of the socket 3 to the right. However, with increase in length of the socket 3 as it is drawn, the punch does move to the right against the resistance of the piston 36 whose chamber 38 is pressurized.
Patent GB-1074718-A (GB)
Title: Heat exchangers
IPC: F28F7/02
Filed: 1965-12-20
Abstract: 1,074,718. Heat exchangers. HARZER ACHSENWERKE SCHWEMANN & ALTHOFF KOMM GES. Dec. 20, 1965 [Dec. 23, 1964], No. 53877/65. Heading F4S. A heat exchanger for two separate fluids comprises at least one cylindrical block with flat end faces and having fluid channels extending through concentric annular zones of the block, one alternate set of channels being intended for one of the heat-exchanging fluids and the other alternate set being intended for the other fluid, any two adjacent channels in a zone being parallel to one another and each channel being inclined in relation to a radial plane passing through its entry end. All the channels in the block may be inclined in the same direction (Fig. 3) or the channels in adjacent zones may be of opposite inclinations (Fig. 4) in relation to a radial plane of the block. The fluids pass in contraflow directions through their respective channels and are collected at each end of the block (or the assembly of blocks in a multiblock heat exchanger) by manifolds (Fig. 5) which interconnect the respective channels and conduct the fluids to inlet and outlet headers which may have a graphite lining. In a heat exchanger comprising a plurality of blocks, corresponding channels in adjacent blocks are of opposite inclinations to create turbulence in the fluids as they pass through the channels (Fig. 1).
Patent GB-1244820-A (GB)
Title: Process of preparing butadiene resin
IPC: C08K5/14
Filed: 1969-03-24
Abstract: 1,244,820. Cyclizing butadiene polymers. FIRESTONE TIRE & RUBBER CO. 24 March, 1969 [25 March, 1968], No. 54242/70. Divided out of 1,238,966. Heading C3P. A sulphuric acid reacted, acetylated, or hydroxylated polymer of butadiene having at least 35% of the non-sulphuric acid reacted, non-acetylated or non-hydroxylated groups in the 1,2-configuration is cyclized by heating at a temperature of at least 250‹ F. in the presence of a decomposable peroxide.
Patent GB-1246451-A (GB)
Title: Improvements in or relating to the mounting of gutters on buildings
Inventor: MOLYNEUX GEORGE
IPC: E04D13/072
Filed: 1967-11-30
Abstract: 1,246,451. Guttering. MOLYNEUX ENG. CO. Ltd. 26 Feb., 1969 [30 Nov., 1967], No. 54440/67. Heading E1B. A roof construction comprises a purlin 19 and a plurality of gutter brackets each comprising a support part 12 for the gutter 13 and a shank 11 which rests intermediate its length on the purlin 19 and engages the underside of a roof panel 31 at its free, inner end 15, the shank 11 being provided with an abutment 14 which engages the purlin 19 to prevent outward displacement of the bracket. The free end 15 may be cranked, as shown, or may carry an adjusting screw (Fig. 3) which bears on the panel 31. The abutment 14 may be welded to or pressed from the shank 11. Alternatively (Fig. 2) the abutment (24, 25) may be adjustably secured to the shank 11 by a bolt (23) engaged through a slot (26) in the abutment. Several abutments or locations for securing abutments may be provided along the length of the shank.