baber/WOPTO huggingface dataset:
Patent GB-682656-A (GB)
Title: Improvements in or relating to amplitude limiting arrangements for electric carrier current communication systems
Inventor: MACMULLAN JOHN SUMNER MUNRO
IPC: H03G11/04
Filed: 1951-07-24
Abstract: 682,656. Valve circuits for radio reception. STANDARD TELEPHONES & CABLES, Ltd. July 24, 1951, No. 17510/51. Classes 40 (v) and 40 (vi). An amplitude limiting and noise suppressing arrangement for a receiver provided with automatic gain control arrangements, comprises a limiting amplifier valve to which the received waves are applied after subjection to automatic gain control, means including a normally blocked control valve for applying a cut-off bias voltage to the limiting valve, and means for applying the automatic gain control voltage to the control valve in such manner that when the received carrier level becomes less than a predetermined value the control valve is unblocked and the said cut-off bias voltage is increased. As shown, the received carrier, after subjection to A.G.C. in earlier stages of the receiver, is applied via potential divider 4, 5 to the control grid of the limiter valve 1. Under normal conditions the valve 1 is biased by means of a chain of resistors comprising a resistor 7 and potentiometer 8 connected between the positive high-tension supply and a negative bias source, to pass short pulses at the tips of the positive half-cycles of carrier wave, the tuned transformer 13 selecting the fundamental component of the carrier frequency to provide a carrier wave of constant amplitude. The valve 1 also removes the noise voltages, which under normal conditions cannot overcome the cut-off bias. When serious fading occurs the A.G.C. greatly increases the noise voltages which may then overcome the cut-off bias, and to overcome this a control valve 18 is provided which is connected across the potentiometer 8. The A.G.C. voltage is applied to the grid of valve 18 which is normally biased to cut-off, and if serious fading occurs the A.G.C. voltage decreases sufficiently to unblock valve 18, with consequent increase in the negative bias applied to valve 1 so that noise voltages are more efficiently removed. This will tend to make the limiting unsatisfactory since the carrier voltage may be insufficient to reach the grid current region which sets the upper limiting level, and a compromise is necessary between efficient noise suppression and efficient limiting, it being assumed that when the signal-to-noise ratio is low incomplete noise suppression is more harmful than incomplete limiting. The point at which valve 18 becomes unblocked can be adjusted by potentiometer 22 and once it is unblocked the cut-off bias applied to the valve 1 progressively increases as the carrier level decreases, and limiting becomes less and less complete until the carrier wave is cut-off altogether.
Patent GB-1256229-A (GB)
Title: Improvements relating to road vehicle lamps
Inventor: BROWN JOHN HERBERT
IPC: F21S8/10
Filed: 1968-04-11
Abstract: 1,256,229. Vehicle lamps. FLEXIBLE LAMPS Ltd. 10 April, 1969 [11 April, 1968], No. 17592/68. Heading F4R. A multiple-light rear lamp unit for a road vehicle comprises a combination on a flexible base 10 of a direction indicator light with bulb 18, a tail light with bulbs 19 and a stop light with bulb 20, the direction indicator light being in one compartment 17A covered with an amber plastics lens 24 and the tail light and stop lights being in another compartment 17B covered with a plastics lens 25, this latter compartment having windows 51 made of clear or translucent uncoloured plastics material in apertures 46 on either side of the bulbs with means for inserting and retaining opaque or coloured translucent screens 53 inside each window to cut off the light or to colour it as required. A window 51 is inserted in guides 47 on either side of each aperture 46 and has a central spine 54 on its inside surface so that screen 53 is retained in grooves 48 in guide 47 in a bowed condition under pressure to prevent rattling. The screen may be omitted if white light is required to illuminate a number plate or a red screen may be fitted as a warning light.
Patent GB-589867-A (GB)
Title: Improvements in or relating to automatic tuning control systems for radio receivers
IPC: H03J7/04
Filed: 1944-09-14
Abstract: 589,867. Automatic tuning correction. JOHNSTON, W. G., and WRIGHT, C. S. Sept. 14, 1944, No. 17634. [Class 40 (v)] An automatic tuning control system for a receiver comprises a frequency discriminator circuit feeding an amplifier whose output is adapted to control the variation of the receiver tuning, wherein means are provided for feeding back a voltage from the output of the amplifier to the input thereof, in correct phase to produce oscillation of the amplifier and hence periodical variation of the frequency of local oscillation until an opposing voltage of sufficient magnitude to stop oscillation of the amplifier is produced by the discriminator. The output from the frequency discriminator appearing across resistances 19, 21 is fed between the grid and the bias source of the amplifier valve 23, the bias source consisting of a tapping on a potentiometer 24, 25 connected across a source of potential 3. The amplified voltage which appears across the anode load resistance 26 of valve 23, is applied to the end of a potentiometer 5 to vary the voltage on a frequencycontrolling electrode of the local oscillator 2 and so to correct the tuning. The output lead from amplifier 23 is also connected through a condenser 27 to a phase shifting R.C. network comprising series connected condensers 28 and resistances 29 connected between the condensers 28 and the cathode of valve 23. The phase shifting network is also connected, as shown, to the grid of valve 23 and thus feeds back a voltage which at one particular frequency, depending upon the time constant of the net. work, is in phase with the voltage applied to the grid from the discriminator and thus sets valve 23 oscillating at a low frequency. The resulting oscillatory output across resistance 26 is applied to the frequency control of the local oscillator causing its frequency to swing continuously through a predetermined band until the discriminator produces an opposing voltage of sufficient magnitude to stop. oscillation in the valve 23. Diode 30 causes the output waveform of the vale 23 when oscillating to be saw-toothed in shape. Thus, if the local oscillator sweeps upward slowly, the received signal of lowest frequency in the band is selected. This can be used to avoid image response. Mechanical tuning may be used instead of electronic to produce the desired frequency sweep.
Patent GB-1340169-A (GB)
Title: Socket terminal
IPC: H01R24/12
Filed: 1972-04-17
Abstract: 1340169 Two part couplings AMP Inc 17 April 1972 [27 April 1971] 17660/72 Heading H2E A socket for co-operating with contact pins 14 projecting from the hermetically sealed enclosure of a refrigerator motor comprises a unitary moulded plastics body (Fig. 5) having contacts located in three parallel passages. Each contact 1 comprises a channel-shaped portion 4. The mating pin 14 enters through a slot 8 in the base of the channel in line with a hole 9 in the body. Tongues extending from the ends of the slot have concave ends 13 which engage the pin 14 and are upturned to make insertion easier than withdrawal. Portions 11 of the channel walls have curved parts 15 which also engage the pin 14. Crimp and insulationsupport ferrules 5 and 6 are provided. In assembly, ears 16 guide the contact 1 into the body, and those ears 16 at the front end are deflected inwards by ramps 20 and latch behind shoulders 19, while the end of the contact 1 engages stops 17.
Patent GB-145569-A (GB)
Title: Improved process for the production of artificial trass
IPC: C04B7/147
Filed: 1920-06-29
Abstract: 145,569. Link, E. July 9, 1917, [Convention date]. Compositions containing blast furnace slag and silica.-Blast-furnace slag is mixed with burnt clays rich in silica such as brick-dust, clinker, chamotte, stones or other burnt clay, and the mixture is finely ground to produce a substance similar to trass for use in'mortar. The proportions used are from one-half to two-thirds of slag to from one-half to one-third of burnt clay.
Patent GB-789893-A (GB)
Title: Improvements in or relating to egg-cleaning apparatus and methods of cleaning eggs
IPC: A01K43/00
Filed: 1955-06-20
Abstract: 789,893. Eggs, fruit, &c., washing. HEWITT, S. R. June 13, 1956 [June 20, 1955], No. 17694/55. Class 28 (2). [Also in Group XXII] Eggs &c. in a perforate receptacle 4 are submerged in a liquid container 3 on a platform 5 which is vibrated to agitate and wash the eggs, after which the receptacle 4 is withdrawn to allow the eggs to drain and dry. The agitator comprises a weight 27 on a rod 25 rotated through a spring connection 23 by an electric motor in a casing 22. On rotation, the rod 25 vibrates a surrounding ring 26 attached to a board 20 bolted to the back 6 of platform 5. The platform 5 rests on the out-turned ends of uprights 10 clamped to the back 6 by bolts 9. Each upright 10 is resiliently secured to its stationary upright 11 on a base 12 by a U-shaped clamp 16 containing a spring 19 and by a rubber block 14 and bolt and nut 15.
Patent GB-777722-A (GB)
Title: Improvements in or relating to magnetic scanning circuits for cathode ray tubes and the like
Inventor: KIRKHAM PETER
IPC: H03K4/90
Filed: 1954-06-16
Abstract: 777,722. Saw-tooth generating circuits. PYE, Ltd. June 1, 1955 [June 16, 1954], No. 17701/54. Class 40(6) The slope at the beginning of a saw tooth deflection wave form is linearized by providing a linearity control member made at least partly of conducting material and coupled electro-magnetically to the deflection coil, the member having such dimensions that it causes loss at the frequencies contained in the fly back pulse but not at the scan repetition frequency whereby the energy available for producing the first part of the scan, is reduced. The member may take the form 1, 1a, and may be made of metal or of insulating material lined with aluminium foil. In an alternative embodiment used in an efficiency diode type circuit the linearizing element consists of a synthetic resin impregnated paper tube lined or covered with aluminium foil and fitting over the neck of a cathode ray tube partly within the deflector coil assembly, the rear end of the tube being clamped in position by the iron trap magnet assembly (complete drawing, not shown).
Patent GB-977147-A (GB)
Title: A machine for the manufacture of articles of footwear
IPC: A43D117/00
Filed: 1961-05-16
Abstract: 977,147. Removing shoes from machines. E. A. G. BERTRAND. May 16, 1961 [Aug. 24, 1960], No. 17703/61. Heading A3B. A machine for use in the manufacture of articles of footwear comprises a fluid actuated discharging device functioning automatically after an operation has been performed on an article of footwear. In the construction shown the removal means comprises a base 19 on which are, pivoted about axles 5, levers 1 carrying at their extremities plates 2 mounted for swivelling on ball joints 3 which balls are continuations of the arms 4 which are screwed into tapped holes in levers 1. The upper ends of the levers 1 are attached by pivots 8 to piston rods 7 of the pistons 6 which work in opposition in the cylinder 9. The passage of compressed air through f, into the central pipe 51 works on the pistons 6 forcing their front faces apart thus effecting the closing of plates 2 to grip an article e.g. a shoe 41. The gripping act is terminated by admitting compressed air through f 2  into the pipes 50 on to the rear faces of the pistons 6, the supply of air passing through f 1  having been cut off. The removal means is mounted on a arm 20 which is mounted for movement vertically and angular rotation horizontally, the former being effected by attaching the arm 20 to a piston rod 10 the piston of which works in the cylinder 11 and the latter by pivotally connecting the arm 32, which is rigidly attached to the piston rod 10, through a forked joint 34 to a piston rod and piston working in the cylinder 30 pivoted about its base and on a pivot 29 so that the linear motion of the piston working in cylinder 30 may be translated into rotational motion of the piston rod 10. The control devices for the cylinders 9, base attachment, is terminated the gripping mechanism is triggered by the rotation of cams in the aforementioned heel base 11 and 30 are mounted on a base plate 16 and comprise a common air inlet valve 35, a reducing pressure guage 39, two electrically operated valves 36 and 37 and for each individual cylinder two pressure adjusting cocks 25 the settings of which give various working speeds of the piston, When the operation, which may be heel attaching machine thus gripping, lifting and transferring the article to a point above a conveyer system, which may be a conveyer belt 42 whence the article is freed, the conveyer system carrying the article to the next operating station.
Patent GB-904845-A (GB)
Title: Magnetic drum data storage system
IPC: G11B5/76
Filed: 1961-05-16
Abstract: 904,845. Magnetic drum storage apparatus. NATIONAL CASH REGISTER CO. May 16, 1961 [May 20, 1960], No. 17722/61. Class 40 (2). In a magnetic drum storage apparatus the spacing between the recording surface and the heads is controlled by means of a slightly tapered record drum having axially movable positioning means. Fig. 1 shows in exaggerated form such a tapered drum 26 which is rotatable with the outer sleeve 27 of a bearing having an inner sleeve secured to a stationary shaft 23. The drum is driven via dogs 33, 34 and a belt drive 35, 36 by a motor 28. The shaft 23 and drum 26 is axially movable with respect to fixed transducing heads 46 by wormwheel 37 mounted in a threaded part of the shaft 23 and driven by a reversible servomotor 39, which is normally stationary in the absence of a correction voltage applied either to a coil 120, Figs. 13A and 13B, which rotates motor 39 in a direction to close the spacing between the drum and transducers, or to a coil 121 which rotates the said motor in a direction to open the said spacing. The said voltages are obtained by the operation of relays operated by electronic circuits tripped by the increase or decrease of an A.C. voltage beyond predetermined limits, said excursions being detected by a magnetic head 103 which reads a continuous A.C. signal recorded by a head 101 from signals generated by a multi-gapped head 44 and a toothed ring 42 of magnetic material mounted on the end of drum 26, the strength of the recorded signal varying with the variation of the spacing between head 101 and the drum surface.
Patent GB-882251-A (GB)
Title: Data storage devices
IPC: G11B5/004
Filed: 1959-05-25
Abstract: 882,251. Electrical digital-data-storage apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 25, 1959 [May 26, 1958], No. 17734/59. Class 106 (1). A magnetic storage drum 10 is supported in a housing 13 and rotated under the action of a fluid, a single tranducer 16 is located in the housing and means are provided to bring any of a series of annular storage tracks on the drum adjacent the transducer. The drum 10 rotates on a hollow shaft 28 to which air under pressure is supplied through entry 21, passages 22, 23 and inlet port 27. Orifices 28 in the shaft deliver the air to end caps 31, 32 between which the drum is located and which have orifices 37 directing jets of air against notches 17 in reduced portions 37 of the drum 10 which the end caps embrace. The air then forms a bearing for the drum between the outer surface of the drum and the inner surface of the housing before passing to atmosphere through outlets 41 packed with sintered metal. The drum is moved longitudinally to bring a selected track beneath the transducer 16 by a series of pistons 51 to 55, each acting on the next in line and piston 55 acting on the end of shaft 26. The movement of each piston is limited by an associated lug 63 to 67 and is initiated by pressurized air from passage 68 directed through solenoid-actuated valves 71 to 75. The pistons act against the pressure of air in passage 23 on the expanded end 87 of shaft 26 which provides the return force for the drum. Alternative fluid drives are described in which air is led from the interior of the drum through passages to be directed against the interior of the housing. Specification 882,250 is referred to.
Patent GB-1434054-A (GB)
Title: Spacers for supporting reinforcement for structural concrete  parts or the like
IPC: E04C5/18
Filed: 1973-04-12
Abstract: 1434054 Spacers in reinforced concrete structures W HUBNER 12 April 1973 [18 April 1972 28 Oct 1972 24 March 1973] 17769/73 Heading E1W Mesh reinforcement is spaced from a shuttering surface in cast in situ concrete structure by a plurality of spacers which each support the mesh of three triangularly spaced points. The spacers comprise at least two U-shaped yokes having legs 4 and mesh supporting struts 2. The yokes are secured together so that the struts extend generally in the same plane and in two dimensions in the plane. The yokes may be spot welded together at their legs or may be of tubular construction secured by clips engaging the ends of the tubes. Alternatively they may be integrally formed as a single part. The struts of the yokes may intersect and be secured at the intersection. The struts may be sinuous or curved. The yokes may be stamped, cast, moulded or bent, formed from steel or iron wire asbestos cement or plastics, may have height adjusting feet, may be of metal wire coated at least in their foot region with plastics or may be provided with plastics suckers as feet. The feet may be turned out or in of the yoke so as to grip the shuttering under load.
Patent GB-681320-A (GB)
Title: A combined carrying bag and deck-chair sunshade
IPC: A45B11/00
Filed: 1950-07-17
Abstract: 681,320. Awnings for seats. EVANS, A. C., and POTTEN, C. H. July 16, 1951 [July 17, 1950; Feb. 12, 1951], Nos. 17811/50 and 3362/51. Class 52(ii) [Also in Group XVII] A bag which when empty can be fitted upon a deck chair to serve as an awning therefor has a flexible body 1 in which is fitted a U-shaped wire frame with the bridge portion 2 along the bottom of the bag and limbs 3 emerging from the bag and having hooked end portions 4 projecting above it. Brackets 5 are swivel mounted on the limbs 3 and have ends 6 of bifurcated form. To erect the awning the brackets 5 are slid up the limbs 5 so that the downturned ends of the hooks 4 can enter holes 7 and the bifurcations or clips 6 may then be engaged over the rail 8 of a deck chair. In modifications the brackets 5 are assembled between nuts and washers screwed on to threaded ends of the limbs 3, or they are attached to pivot pins on the limbs.
Patent GB-274083-A (GB)
Title: Improvements in and relating to excess current safety devices for electric circuits
IPC: H02H3/08
Filed: 1927-07-05
Abstract: 274,083. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts Ges.). July 7, 1926, [Convention date]. Cut-out arrangements. -- In the protection of polyphase mains in which a sheath surrounding the cable has imposed upon it a voltage derived from highly saturated transformers T1, T,2, T3 in series with the mains as described, for example in Specification 152,316, the series transformers are provided with auxiliary secondaries l1<SP>1>, l1<SP>11>, l1<SP>111>, instead of employing separate current transformers for protective purposes. In the arrangement shown the auxiliary secondaries are connected up in delta with an indicating ammeter MR, in the circuit. Protective relays MR2 and MR3 are connected across two of the secondaries in series with tuning condensers C so that the relays are particularly sensitive to the third harmonic of the normal frequency of the lines. In the event of fault this harmonic is developed and serves to operate the relays which isolate the lines. The arrangement provides an operating voltage of nearly sinusoidal form.
Patent GB-292519-A (GB)
IPC: F04B39/10
Filed: 1928-06-20
Abstract: 292,519. Zallud, H. June 20. 1927, [Convention date]. Valves, arrangement of.- The inlet and delivery passages b, d of an air pump are arranged in a block a screwed into the barrel i, the inlet passage being of larger area than the outlet passage. The inlet passage b is closed by a ring f and the passage d by a ball h
Patent GB-725405-A (GB)
Title: Improvements in mixtures of polyvinyl acetal resins with ethyl acrylate polymers
IPC: C08L29/14
Filed: 1953-06-29
Abstract: A thermoplastic mixture comprises a blend of 5-20 per cent of an ethyl acrylate polymer consisting of any of polyethyl acrylate, and a copolymer of ethyl acrylate with isobutylene or with vinyl 2-chloroethyl ether and 95-80 per cent of a polyvinyl acetal characterized by at least 75 per cent ester replacement. Specified acetals are the formal and butyral resins.  Fillers, reinforcing agents, dyes, pigments and stabilizers may also be present.  The mixtures may be used to make gears, cams, bobbins, shuttles, pickers, tote boxes, phonograph records, steering wheels, roller skate wheels, printing plates and die-cutting blocks.
Patent GB-732919-A (GB)
Title: Improvements in or relating to blade assemblies of turbo-machines such as compressors and turbines
Inventor: KENT NELSON HECTOR
IPC: F01D9/04
Filed: 1953-07-15
Abstract: 732,919. Turbines and compressors. ROLLSROYCE, Ltd. July 14, 1953 [July 16, 1953], No. 17916/52. Class 110 (3). In a turbine or compressor, a blade-supporting structure comprises an inner wall 11 which is a wall of the workmg fluid passage, and an axiallyextending flange 16 disposed radially outwardly of the inner wall. Pairs of aligned slots 14, 17 are formed in the inner wall and flange, the slots in the flange being open at any edge of the flange and blades 10 are mounted in the slots and a locking wire 18 extends through holes formed in the ends of the blades and through a retaining channel formed by turning over the edge of the parts of the flange between the slots. The blades are formed from strip material and the leading and trailing edges at the root end may be cut away to form surfaces which abut against the inner surface of the wall 11. The compressor casing shown comprises also a sheet metal skin 12 and the flange 16 is formed with a radial flange 15 which is secured to a channelsection member 13 secured between the walls 11, 12. The edge of the flange may be in the form of a hollow bead through which the locking wire is threaded or the edge of the flange may be turned over on to the locking wire during assembly. The blades' may in addition be welded at 19 to the supporting structure.
Patent GB-1294596-A (GB)
Title: Process for the preparation of polypentenamers
Inventor: NUETZEL KARL
IPC: C08G61/08
Filed: 1970-04-15
Abstract: 1294596 Cyclopentene polymerization catalyst FARBENFABRIKEN BAYER AG 15 April 1970 [15 April 1969] 17944/70 Heading C3P Cyclopentene is polymerized in the presence or (a) WCl 6 , (b) an organotinhydride and (c) a hydroperoxy, nitro, aldehyde, epoxy or alcohol compound. In examples, the catalysts are WCl 6 -(C 2 H 5 ) 3 SnH or (C 6 H 5 ) 3 SnH or (C 4 H 9 ) 2 SnH 2 - cyclopentenyl hydroperoxide or ethanol or 1,2-dinitro-3,5-dichlorobenzene.
Patent GB-184957-A (GB)
Title: Process for the production of basic steel
IPC: C21C5/28
Filed: 1921-07-02
Abstract: 184,957. Soc. Anon. Usines Metallurgiques de la Basse-Loire. July 2, 1921. Addition to 163,693. Purifying and refining.-In a process for preparing basic steel as described in the parent Specification, hard or semi-hard steels with a high carbon content and practically desphosphorized are prepared by treating grey iron by a one-stage blowing process and dispensing with the usual recarburizing-agents by regulating the quantities of pig iron introduced into the bath. Owing to the fluidity of the material during treatent, and the elimination of projections during the blow, the converter may be filled with the maximum weight of charge capable of being dealt with by the turning or lifting apparatus.