baber/WOPTO huggingface dataset:
Patent GB-1497667-A (GB)
Title: Apparatus for detecting and indicating the presence in a fluid environment of a potentially dangerous constituent
IPC: G01N27/04
Filed: 1974-04-26
Abstract: 1497667 Measuring gas concentration electrically NEOTRONICS Ltd 15 April 1975 [26 April 1974] 18386/74 HeadingGlN The methane content of an atmosphere is measured by a heated catalytic type resistance transducer connected in a bridge network which is energized periodically, the circuit incorporating alarm means energized at a predetermined methane level, and fault detecting means. As shown, Fig. 1, the bridge network 2, containing an inactive resistance transducer to provide automatic ambient temperature compensation, is energized from a D.C. power source 6 and arranged to give an output signal which changes its polarity when the methane concentration exceeds a threshold level. The bridge power supply is controlled by a timer 16 to be on for e.g. 10 seconds each 4 minutes, the time ratio being adjustable at 14, and capable of being overridden by a timer 22 to produce the 10 second period without delay. The bridge output signal is fed via comparator 4 to logic gating circuits 24, together with signals from circuits 30, 32 which sense open-circuit and short-circuit conditions of the bridge. A fault or an excess gas concentration signal energizes via latch 26 an audio frequency oscillator 38 to produce an audio alarm. An excess gas concentration signal also energizes via latch 28 an LF oscillator 34 which modulates the audio alarm. The gating circuits 24 also have an input from a battery voltage sensor 44 to produce an alarm signal when the battery voltage is falling. The calibration of the bridge network may be checked by replacing the catalytic transducer by a test resistor, using a manually operated switch, simulating a predetermined methane concentration.
Patent GB-206551-A (GB)
Title: Improvements in thread guides of twisting frames
IPC: D01H13/04
Filed: 1922-07-05
Abstract: 206,551. Mitchell, W., and Foster, H. H. July 5, 1922. Thread guides.-In thread guides for twisting- frames wherein pot eyes are secured in their holders by resilient means, the pot eyes are provided with a projection 9 to engage a hole or one or the other of two holes in a spring-pressed plate 6, so as to maintain them in position and to provide means whereby they may be adjusted when worn. The projection may be formed on the plate and the holes formed in the pot eye. The plate 6 is fixed to a spindle 12 mounted in a hole in the holder, or, as shown, in a slot 13 under the action of a spring 14, and is provided with a tail-piece 16 secured by a set-screw to a block 18 slidable in the slot.
Patent GB-1046093-A (GB)
Title: Variable pitch sheave
IPC: F16H55/56
Filed: 1964-05-04
Abstract: 1,046,093. Expanding wheel gear; securing articles on shafts. DODGE MANUFACTURING CORPORATION. May 4, 1964 [May 10, 1963], No. 18444/64. Headings F2D and F2U. In a variable pitch spring-loaded V-belt pulley the pitch is controlled by belt tension in response to mechanical adjustment of a cooperating variable pitch pulley or bodily movement of a fixed diameter pulley and the belt 12 is maintained in a constant plane by loading each axially movable pulley flange by separate aligned springs 60, 62 reacting on a common abutment 64 secured to the shaft hub 20. Sliding keys 35, 36 drivingly connect the hub to the inner flange and the two flanges together. The hub 20 is secured on a shaft end by a split coned bush 116 loaded in or out by a screwed collar 118 thrusting on the bush through a snap ring 124.
Patent GB-294366-A (GB)
Title: Improvements in latch locks for desks and the like
IPC: E05B65/44
Filed: 1927-07-13
Abstract: 294,366. Butter, A. J. July 13, 1927. Latches, sliding; lock. ing sliding latches; staples for locks and latches. - In a latch Jock for desks &c. the casing i has an open transverse slot k at its upper edge to receive the co-operating member carried by the lid, shown separate, Fig. 4. This comprises a rectangular eye c integral with a plate d having holes e for affixing screws and spikes f which enter the lid. The latch bolt q, guided by stop pins n, is projected into the slot k by a spring r and has a finger-piece s for withdrawing the latch in the form of a rod, knob, or handle, passing out of the front of the desk, and preferably placed so as to be concealed by the rim of the desk. The lock bolt u has a projection v adapted, when bolt u is shot by a key, to engage the left end of a recess w in the latch bolt, to lock the latch bolt against withdrawal.
Patent GB-881313-A (GB)
Title: Gearbox
Inventor: FELL LOUIS FREDERICK RUDSTON
IPC: B61C9/10
Filed: 1959-06-01
Abstract: 881,313. Change-speed gear. ROLLSROYCE Ltd. May 25, 1960 [June 1, 1959], No. 18706/59. Class 80 (2). [Also in Group XXXI] Gearing for use in two-engined Diesel locomotives comprises first and second input shafts, an output shaft which is driven by a differential gear, and gear change means for selectively transmitting the drive from the first and second input shafts either to the same or to opposite sides of the differential gear. As shown, a bevel gear differential having a planet carrier 39 fast with a driven shaft 16 has one of its sun gears 25 fast with a shaft 23 driven through a hydrodynamic torque converter (not shown) from one of the Diesel engines, the other sun gear 38 being carried by a sleeve 37 surrounding the driven shaft and prevented from reverse rotation by a one-way detent 44 of general similar construction to a Legge clutch. Fast with the first engine-driven shaft 23 and the sun gear 25 is a gear 29 meshed by a gear 30 carried by a shaft 24 driven through a hydrodynamic torque converter by the second Diesel engine and connected for rotation therewith by a ratchet clutch 32 of the Legge type. A gear 34, mounted for rotation upon the second engine drive shaft 24 but adapted to be clutched thereto by a positive dog sleeve 36, meshes a gear 35 secured to the sleeve 37 and a sun gear 38. If both the Diesel engines rotate their shafts 23, 24 and the clutch 36 is disengaged, the Legge clutch 32 engages and the torque of the shaft 24 is transmitted through the gears 30, 29 to the sun gear 25, which latter also receives torque directly from the shaft 23, the one-way detent 44 preventing reverse rotation of the sun gear 38. Accordingly a low ratio drive is obtained. If, however, the positive clutch 36 is engaged, the drive from the second engine shaft 24 is transmitted through the gears 34, 35 to the sun gear 38, and the Legge clutch 32 overruns, as also does the one-way detent 44. Accordingly both sun gears 25, 38 are driven, and a relatively high ratio is obtained. If the Diesel engine driving the shaft 24 should become inoperative, then the locomotive may be driven through the shaft 23, the one-way detent 44 preventing the sun gear 38 from rotating backwardly. If, during operation of the gearing in the high ratio, the engine driving the shaft 23 fails, the speed of rotation of the gear 30 decreases until the Legge clutch 32 engages, so that drive is still momentarily transmitted to both sun gears 25, 38. Due to the increase load placed on the engine driving the shaft 24, its speed is reduced, and automatic means (not further described) shuts down the engine and disengages the dog clutch 36. Drive is then taken up again from the shaft 24 through the Legge clutch 32, the gears 30, 29 and sun gear 25, the one-way detent 44 again restraining the sun gear 38 from reverse rotation. The driven shaft 16 is connected to the rail wheels of the locomotive through a reverse and reduction gear (not further described).
Patent GB-1510892-A (GB)
Title: Drive coupling
IPC: F16D1/096
Filed: 1975-05-05
Abstract: 1510892 Mounting parts on shafts; flexible shaft couplings HILLIARD CORP 5 May 1975 18758/75 Heading F2U  A flexible shaft coupling comprises bushes 8, 10 removable from the shaft ends and provided with frusto-conical outer surfaces 30 for mounting coupling heads 12, 14, each head having axial projections whieh overlap those on the opposite head to provide the drive. The bushes and heads may be moulded in polycarbonate or nylon and the axial projections may engage the spokes of a resilient spider ring 16. The inner frusto-conical surfaces of the heads may each be provided with small axial ribs and a slot for receiving a spline on the associated bush. Each bush has an end stop and is held on its shaft by a key. Alternatively, each bush may be held by a setscrew (35) Figs. 5 to 7 (not shown) which passes through a metal insert (36).
Patent GB-315981-A (GB)
Title: Improvements in vacuum brake cylinders for railway and like vehicles
IPC: B60T13/46
Filed: 1928-06-28
Abstract: 315,981. Gresham,S. T. June 28, 1928. Fluid-pressure. - A vacuum brake cylinder for railway and like vehicles comprises a cylinder proper a and a casing g welded to a common base rmg f , a cover plate s welded to a ring q to which is also welded a vertical slotted cylinder r disposed between the piston d and an enlarged lower part of the cylinder b and forming a seating for the rolling packing ring c, the connection between the cover and the base of the vacuum chamber being so positioned that the base of the piston d in its lower position is approximately at the level of the base of the vacuum chamber formed between the cylinder and casing so as to provide a large vacuum space. The ring q is detachably bolted to the ring f. A sleeve t in which fits a bush u for the piston rod v is welded to the cover plate s and a boss p for the piston rod is welded to the piston d. The cylinder a, cover s, casing g and piston d are all steel pressings. The ring w containing the piston rod packing is detachably secured to the cover s. Apertures are formed in the bottom or the side of the ring f so as to provide with the fitting n to which the release valve m is attached, two passages extending respectively into the vacuum space j and the cylinder a. A strengthening vertical plate g<1> may be welded to the top of the casing g to enable it to be made flatter than would otherwise be advisable.
Patent GB-1024120-A (GB)
Title: Improvements in or relating to teleprinters
Inventor: MASON FREDERICK PERCIVAL
IPC: H04L25/40
Filed: 1964-05-06
Abstract: 1,024,120. Telegraphy. CREED & CO. Ltd. May 6, 1964, No. 18806/64. Heading H4P. In a receiver in which characters are printed or perforated in accordance with received Start-Stop signals, the electromagnets which select the character are energized by rectified but unsmoothed A.C. as is also the electromagnet which initiates the recording operation. Signals received on line 10 are converted to parallel form and feed gates 22-26. When a complete character has been received a pulse appears at 39 whereby pulses from unit 35 step counter 40. These pulses correspond to the zero points in the unsmoothed rectified A.C. from 27. When the first pulse is received, gate 34 opens, and the 5-bit signal is set up on electro-magnets 28-32 in the recorder. At the second pulse release magnet 46 is energized, causing recording. At the end of the recording operation a pulse from 47 resets the counter to its rest position.
Patent GB-335214-A (GB)
Title: Improvements in or relating to flour and dough
IPC: A21D2/04
Filed: 1929-06-19
Abstract: 335,214. Dapper, J. June 19, 1929. Treating with solid substances. - In the process for improving the baking property of flour or dough wherein a small proportion of a mixture of persulphates and bromates is added thereto, an acid-neutralizing constituent, such as magnesium carbonate and/or calcium carbonate, preferably in a quantity exceeding that of the additions, is incorporated with the mixture or is added, jointly with the mixture, to the flour or dough. Thus a mixture, of 3 grams of potassium bromate, 5 grams of potassium persulphate, and 50 grams of magnesium carbonate is added to 100 kgs. of flour.
Patent GB-1174167-A (GB)
Title: Improvements in or relating to the manufacture of diaphragm-sealed closures for containers
Inventor: BLAKEMORE THOMAS DAVID
IPC: B29C65/10
Filed: 1967-04-25
Abstract: 1,174,167. Container closures. GEE MFG. CO. Ltd. 15 July, 1968 [25 April, 1967], No. 18883/67. Heading B8T. A method of making a closure member for a container as described in Specification 1,080,184 is characterized by the use of heating means in the form of gas jets 20 or electric radiant heaters, disposed adjacent to the travel path 26 of the closure components Y which replaces the heating means associated with the punch 14 previously disclosed.
Patent GB-688208-A (GB)
Title: Improvements in or relating to joints between parts exposed to deleterious conditions, for example boiler flues
IPC: F23M9/00
Filed: 1949-07-19
Abstract: 688,208. Welded and riveted joints. THOMPSON (TRIUMPH STOKERS), Ltd., J., MARKS, B., and STANTON, F. E. Aug. 9, 1950 [July 19, 1949], No. 18997/49. Class 83 (iv). [Also in Groups XII and XIII] The riveted or welded joint between the furnace flue 1 and shell 4 of steam boiler, or like joint in other plants such as annealing and tempering furnaces, is protected along the whole or part of its length, particularly that arc above the level of the grate 6, by a channel member 8 through which air or a cooling liquid is circulated. Where the usual refractory arch 7 is fitted, one wall of the channel 8 may be provided with apertures 9 which are open to the atmosphere through coating short ducts 10 in the arch and radial ports 11 in an external extension 5 of the flue.
Patent GB-918513-A (GB)
Title: Improvements in or relating to outboard motor tilt release mechanisms
Filed: 1961-05-26
Abstract: 918,513. Outboard motors. INNOCENTI SOC. GEN. PER L'INDUSTRIA METALLURGICA E MECCANICA. May 26, 1961 [Sept. 22, 1960], No. 19053/61. Class 114. The tilt release mechanism of an outboard motor can be released manually or automatically when the motor strikes an underwater obstruction. The motor is supported by a transom bracket 19 upon which the swivel bearing 20 is pivotally mounted at 16. The motor is prevented from tilting by a forked latch member 1 having hooks 3 at one end which engage with a pin 4 on the bracket 19. The opposite end of the member 1 is pivoted to the free end 2 of an auxiliary lever 5 which is pivoted to the bearing 20 at 6. A spring 7 is disposed around the pivot 6 and between the members 1 and 5 to urge the former into engagement with the pin 4. A hand-lever 10, pivoted at 11, is provided, to lift the latch 1 off the pin 4 by engagement of the hook 9 with piece la. The pin 4 is located in a plane below that of the pivots 2 and 6 so that when the motor is subjected to a violent reverse thrust on striking an underwater object the members 1 and 5 will be caused to rotate about the pivot 6 against the action of the spring 8, which is of a tension sufficient to retain the latch 1 engaged with the pin 4 in normal reverse motion of the craft, and thereby release the latch 1 from the pin 4.
Patent GB-1260673-A (GB)
Title: Improvements in and relating to superconductors
Inventor: BURGESS JOHN RONALD
IPC: H01L39/24
Filed: 1968-04-23
Abstract: 1260673 Super-conductors TELCON METALS Ltd 22 April 1969 [23 April 1968] 19112/68 Headings H1A A5 and A4D  A composite super-conductor is produced by inserting a wire or rod of super-conductor material into a tube of Cu or Al, cold-drawing to produce a strand having a cross-section allowing plane contact with adjacent strands, packing an outer tube of high conductivity metal with a plurality of such strands and cold-working by drawing and/or rolling to produce a coherent conductor. The strands may have a hexagonal, triangular or square cross-section. The super-conductor material may be a NbTi alloy. The composite structure may be formed into a tape.
Patent GB-907440-A (GB)
Title: Organic fluorine-containing compounds and a process for preparing them
IPC: C10M105/72
Filed: 1960-04-19
Abstract: Compounds of the formula Y(CF2)nCH2O.SO2.Z, where Z is chlorine or a group -OCH2(CF2)nY, each Y is hydrogen or fluorine and n is 1-6, are useful as solvents for polyvinyl fluoride.  The compound CHF2CF2CH2F is useful as a solvent medium for the polymerization of perfluoro olefines such as tetrafluoroethylene.  Specification 703,434 also is referred to.ALSO:The invention comprises the compounds of formula Y(CF2)nCH2O.SO2.Z where Z is chlorine or a group -OCH2(CF2)nY, each Y is hydrogen or fluorine, and n is 1-12; and their preparation by reacting 0.5-1.25 moles of sulphuryl chloride with about 1 mole of a compound Y(CF2)nCH2OM, where M is Li, Na or K, in an inert organic solvent at 25-120 DEG C.  The compounds of the invention react with (a) amines, e.g. at 230 DEG C., to produce the N-CH2(CF2)nY amine, and (b) with lithium halides LiX, e.g. in an inert solvent at 125-170 DEG C., to obtain Y(CF2)nCH2X and Y(CF2)nCH2O.SO2.OLi (see also Specificatio 907,439).  Specification 703,434 also is referred to.ALSO:Dyestuffs are obtained by coupling a diazotised compound with an aromatic amine N-substituted by a group -CH2(CF2)nY where Y is a hydrogen or fluorine and n is 1-12.  In an example N-1H,1H,3H-tetrafluoropropyl aniline is coupled with diazotized p-aminophenacyltrimethylammonium chloride.  Specification 703,434 also is referred to.
Patent GB-958781-A (GB)
Title: Improved methods of graphic reproduction
IPC: B41M5/00
Filed: 1960-05-30
Abstract: 958,781. Producing reduced images thermographically. MINNESOTA MINING & MANUFACTURING CO. May 30, 1960 [May 28, 1959], No. 19129/60. Heading G2C. A method of producing a reduced image of an original comprises placing an original bearing a radiant energy absorptive image in contact with a polymeric copy sheet which has been oriented in at least one direction but not heat set exposing to radiant energy and transferring image areas from the original to the copy sheet which is then heated above the second order transition temperature to effect shrinkage of the copy sheet. Specified polymers are polyesters, polyamides, polyolefines, polyvinylidene chloride and polymethyl methacrylate. The oriented polymer sheet may be placed in contact with an original bearing volatilisable images so that on exposure the image is transferred and on further heating a reduced image is produced. The oriented polymer may be coated with a layer which darkens on heating (e.g. ferric stearate-spiroindane) and exposed with a graphic original to produce darkened image areas. This imaged polymer sheet is now used as an original and placed in contact with a further oriented polymer sheet, exposed to heat whereupon the darkened image areas transfer and is heated above the second order transition temperature to produce a reduced image on the second polymer sheet. The second polymer sheet may have a light, sensitive heat-developable diazo coating so that on contacting with the imaged polymer sheet and exposing to light, a negative latent image is produced. On heating, a developed, reduced, negative image is produced. Alternatively, the negative latent image is allowed to age in the dark, exposed and is then heated to produce a reduced positive image. The oriented polymer sheet may be opaque due to voids therein which on heating becomes transparent. Alternatively, the oriented polymer may be coated with a layer which flakes off on shrinking the polymer (e.g. a metal soap dispersion) or an opaque layer which becomes transparent on heating (e.g. mircrocrystalline soap). Specification 958,498 is referred to.
Patent GB-776931-A (GB)
Title: Method and apparatus for treating granular material
Inventor: HORTH WALTER
IPC: B22C5/10
Filed: 1954-06-30
Abstract: 776,931. Separating solid materials. SIMPSON CORPORATION, H. June 30, 1954, No. 19196/54. Class 117 Granular material is fed at 12 to a chamber 10 from a vibrating conveyer 14, and divides between two parallel series of identical treating units, and after treatment by a series of units the heavier particles are discharged from the chamber through a spout 15. Each unit includes a conical baffle 20 against which the materials is directed from a tube 22 extending into a cylindrical casing 24 screwed into an opening on a platform or step 27 of the chamber. Air fed to the casing 24 from a blower 42 flows from a nozzle 38, Fig. 2, and entrains granular material which has fallen into the casing 24, and carries it through the tube. The baffle is adjustable on the tube which is vertically adjustable in a supporting spider 28. The high velocity air flows outwardly between the tube and a skirt 20a, and the finer particles are carried away by an exhaust fan 55 of greater capacity than the blower 42 so that air is drawn into the chamber through the outlet spout 15. The heavier particles fall back towards the platform and are recirculated, usually many times, before being discharged from an opening 50a in a barrier 50 to a second treating unit. The material is thus removed successively through the units, the rate of flow therethrough being controlled by its introduction rate at the inlet 12. To commence the treatment, auxiliary high pressure air jets 44 may be used.
Patent GB-256395-A (GB)
Title: Improvements in, or relating to, loud-speakers, gramophones, and other sound-recording or reproducing apparatus
IPC: H04R1/28
Filed: 1925-07-29
Abstract: 256,395. MahÚ, (C. M. de C. de la Bourdonnais), Prince de. July 29, 1925. Loud-speakers : diaphragms. - A device for use as a loud-speaker or gramophone sound-box comprises a large resonance chamber a provided with a short, shallow or dish-shaped horn d, preferably formed integral therewith, and a diaphragm b arranged in front of the resonance chamber so as to utilize the sound waves from both its outer and inner sides. This is effected in the construction shown in Figs. 1 and 2 by mounting the diaphragm on a number of blocks c so as to leave an annular aperture between the edge of the diaphragm and the inner wall of the horn. In modified constructions the diaphragm is stretched right across the inside of the horn and provided with a number of perforations around it near its edge or, as shown in Fig. 5, the diaphragm b may be supported on a flanged frame ax secured to the back d<1> and provided with holes b'. If desired, the walls of the frame ax may be made so thin as to dispense with the holes b<1>. In some cases the resonance chamber itself may be perforated either round the sides or at the back, or both as desired. In the constructions shown in which the device is employed as a loud-speaker, a receiver e is connected by a light rod e<1> to the centre of the diaphragm. the whole being mounted on a pillar f and pedestal f<1>.
Patent GB-1449727-A (GB)
Title: Voltage and temperature compensation circuitry
IPC: H03K19/086
Filed: 1974-05-02
Abstract: 1449727 Transistor switching circuits BURROUGHS CORP 2 May 1974 [1 June 1973] 19232/74 Heading H3T [Also in Division G3] A biasing voltage circuit produces an output which is not sensitive to variations in a supply voltage but which varies in dependence on temperature so as to compensate for variations in base-to-emitter junction voltage of an output transistor. The output voltage maintains a constant supply to the emitters of two transistors forming a current mode logic circuit. As shown, a CML gate circuit includes a differential amplifier 91, 93 supplied with constant current by transistors 101, 107 in order to stabilise its input thresholds and output voltage levels. Transistors 101, 107 are controlled by a biasing voltage V R  produced by a feedback compensation circuit 112 including an output transistor 115, the voltage across which is independent of variations in the level of a supply voltage V EE . Transistors 123, 127 are connected so as to produce a temperature variation in the voltage V R  which compensates for temperature variations in the base-emitter voltages of constant current transistors 101, 107.
Patent GB-516453-A (GB)
Title: Improvements in or relating to electrodes for secondary batteries
IPC: H01M4/73
Filed: 1938-06-29
Abstract: 516,453. Accumulators YOUNG ACCUMULA- - TOR CO. (-1929), Ltd. MARTIS, H. DE., anc CLARK, S. J. June 29 1938, No. 19260. [Class 53] A lead grid has main longitudinal bars 1 and supplementary strands 4 mechanically weaker than the bars 1, staggered cross strands 5 being arranged as shown.