baber/WOPTO huggingface dataset:
Patent GB-975758-A (GB)
Title: Electronic switching devices
IPC: H03K17/58
Filed: 1961-02-03
Abstract: 975,758. Semi-conductor bi-stable circuits. INTERNATIONAL BUSINESS MACHINES CORPORATION. Feb. 3, 1961 [Feb. 8, 1960,] No. 4098/61. Heading H3T. A bi-stable circuit comprises a tunnel diode E, Fig. 1, supplied from a constant source I s  biasing the diode approximately mid-way between the maximum and minimum values of current bounding the negative-resistance portion of the diode characteristic, and a transistor T having its base connected to one electrode of the tunnel diode and a load resistor R L  connected in its collector circuit. By virtue of the biasing of the diode E, it has two stable states to which it may be set by current pulses I in  of suitable amplitude and polarity. In the low-voltage state the potential applied to the base of the transistor is of the order of 0.03 volt whereby the transistor is substantially cut-off, while in the high-voltage state, the potential applied to the base is of the order of 0.45 volt, which by a suitable choice of resistor R L  is made sufficient to saturate the transistor. Fig. 4 shows an embodiment comprising two tunnel diodes E 1 , E 2  supplied from a common constant-current source I1 s . The application of a positive current pulse from source 56 makes diode E 1  assume its highvoltage state and diode E 2  its low-voltage state. The base of transistor T 1  is accordingly positive with respect to the base of transistor T 2  so that transistor T 2  conducts and transistor T 1  is switched-off. The circuit may be re-set in its other state with T 1  conducting and T 2  switched off by the application of a positive-current pulse from source 58 or a negative-current pulse from source 56. In a modified form of the circuit, Fig. 6 (not shown), the two diodes E 1 , E 2  are replaced by a single tunnel diode connected between the base of transistors T 1 , T 2 , the biasing means for the transistors being slightly modified to ensure that only one transistor is conducting at any one time. Reference has been directed by the Comptroller to Specification 939,953.
Patent GB-652421-A (GB)
Title: Improvements in or relating to the manufacture of insoluble sulphur
IPC: C01B17/12
Filed: 1948-02-12
Abstract: Insoluble sulphur is produced by introducing molten sulphur at above 200 DEG  C., e.g. 350-420 DEG  C., into an expanding stream of a gas which does not react with insoluble sulphur or cause its reversion to soluble sulphur, e.g. steam, flue gas, carbon dioxide, air, nitrogen, or sulphur dioxide.  The sulphur may be introduced near the point at which a cold anhydrous expanding gas stream is released and a stabilizer for insoluble sulphur such as chlorine, <FORM:0652421/III/1> bromine, iodine, sulphur chloride or bromide may be added, before or after dispersion, to the extent of 0.1-1.0 per cent.  The sulphur is melted, filtered into a storage tank at 140-150 DEG  C., filtered into a feed tank where the stabilizer is added, heated to 400 DEG  C., and dispersed in the gas stream directed at a rotating hollow cylinder cooled with brine.  The sulphur m  is removed from the cylinder, passed to a masticator, e.g. a rubber mill, for partial curing, given a final curing at 30-50 DEG  C., and ground in a brine jacketted mill.  As shown, the disperser has a central tube 4 for molten sulphur, surrounded by insulating intermediate pipe 3, between which and housing 1 flows compressed gas from pipe 11.  The gas flows through adjustable orifice 2 directed at the molten stream of sulphur from orifice 5, the point of emergence of the sulphur may also be adjusted relative to the gas stream. Alternative dispersers are also described.  The Specification as open to inspection under Sect. 91 comprises also introducing sulphur vapour into the expanding gas stream. This subject-matter is not included in the Specification as accepted.
Patent GB-823057-A (GB)
Title: Improvements in and relating to the manufacture of powder carrying tapes for use in xerographic apparatus
IPC: G03G15/06
Filed: 1956-02-10
Abstract: 823,057. Applying powder to porous tapes for storage purposes. BATTELLE DEVELOPMENT CORPORATION. Feb. 10,1956 [Feb. 18, 1955; March 14, 1955], No. 4191/56. Class 94(1). [Also in Group XX] In a method of, or apparatus for, making a powder-carrying tape for use in xerographic cloud generators, a tape of porous material is moved at uniform speed through a loading zone at which an aerosol of xerographic developer powder particles is directed on to and through the tape. In Fig. 3, a tape 28, e.g. of velveteen or flannel, is led from a braked supply reel 30 around guide rollers 32-36 and under a rotary brush 40 which raises the nap and then over a slot 39 in a cylinder 37 to a driven feeding roller 38 from which it passes to a take-up reel 31. Powder 26 is fed to the surface of a rotary grooved disc 16, levelled by a metering blade 17 and sucked into an aerating tube 18 by compressed gas supplied through a pipe 20. The gas stream conveys the aerosol thus formed into the interior of the cylinder 37 and directs it through the slot 39 so that the particles of powder are picked up by the tape. Surplus particles passing through the tape are withdrawn by an exhaust duct 41. In Fig. 4 (not shown), the brush 40 and duct 41 are omitted and the cylinder is formed with several slots.
Patent GB-684023-A (GB)
Title: The production of phosphate coatings on silicon steel sheet stock
IPC: C23C22/74
Filed: 1948-02-13
Abstract: Silicon steel sheet stock has on its surface a thin, uniform, homogeneous, adherent coating wholly or principally of heat treated phosphate of iron, the iron in the phosphate being derived from the iron in the stock, and the coating having a sensitivity of at least 1 ohm per sq.-cm. per lamination at a pressure of 50 lbs. per sq. in. The coating is formed by treating the cleaned surface with a 7-50 per cent phosphoric acid solution, which may contain chromic acid, soluble chromates, fluorides, nitrates or zinc or iron salts, followed by heating at 400-600 DEG F; or it may be annealed in a reducing atmosphere with subsequent slight oxidation during cooling, or in a neutral or slightly oxidizing atmosphere.
Patent GB-466365-A (GB)
Title: Improvements in the joints of tubular structures
IPC: E04F11/18
Filed: 1936-02-13
Abstract: 466,365. Fencing. SHANKS, T., and CRUIKSHANK & CO., Ltd. Feb. 13, 1936, No. 4340. [Class 45] [Also in Group X] In a railed partition or other tubular structure one tube is secured at an angle to another by means of a socket e having extending lugs to be fixed, as by screws i, to the horizontal tube h. The vertical tube a is held in the socket by means of a nut l fitted to a bolt d anchored to the tube and passing through a diaphragm j in the socket.
Patent GB-607820-A (GB)
Title: Improvements in electromagnetically-actuated friction clutches and brakes
IPC: F16D27/08
Filed: 1946-02-12
Abstract: 607,820. Electromagnetic friction-clutches. SAMPIETRO, A. C., and ROBERTSON, D. R. Feb. 12, 1946, Nos. 4360 and 14582. [Class 80 (ii)] [Also in Groups XXXIV and XXXV] To obtain a substantially constant axial engaging (or disengaging) force as the air-gaps vary in an electromagnetic friction clutch or brake, the air gaps, e.g. at 37, 38, 43, are inclined to the axis and are of variable inclination throughout their length so that the ratio of the axial flux-component to the total flux decreases as the total flux increases with reduction in the gap. Axial attraction may thereby be held constant within 25 per cent over a travel of 0.125 in.; and the necessity for periodic adjustment of the gap to avoid fierceness due to wear of the friction facings is avoided. An alternative method of obtaining the same effect is also described below. The clutch is of the kind in which a faced driven disc 20 is gripped between a backing-plate 25 and presser-plate 18 by axial attraction between a magnet 17, secured to the backing-plate 25, and a driving armature 10 to which the magnet 17 and presser-plate 18 are non-rotatably splined, the presser-plate being axially supported by an abutment-ring 19. Inclined air-gaps 37, 38, 43 are provided by interengagement of wedge-shaped pole-pieces on the armature 10 and magnet 17, their profiles being curved to provide a gap variable along its length, the cross-section being determined by a trial and error method detailed, together with dimensions, in the Specification. Shims 30 provide an initial adjustment of the gap. In Figs. 4-6, not shown, the air gaps are provided between inter-engaging sets of straight-flanked, tapering, facial teeth on the armature and magnet, which are slidably connected by pins to maintain tooth-clearance. The teeth are shaped as contrate gear teeth, dimensions being quoted. The roots of the teeth on the armature only increase in radial length towards their roots to produce a relatively increasing radial flux component and so a relative reduction in the axial component as the gap decreases. The clutch may be used on a motor-vehicle, with speed-responsive automatic control (not described).
Patent GB-830827-A (GB)
Title: Polymer compositions
Inventor: CLEGG PETER LIONEL
Filed: 1957-02-08
Abstract: Polyolefin compositions comprise polythene of specific gravity greater than 0.93 and up to 30% of crystallizable polypropylene not more than 80% of which is insoluble in boiling diethyl ether. The composition may also comprise an oxidation inhibitor such as bis-(2-hydroxy-3-alpha - methyl cyclohexyl - 5 - methyl phenyl)-methane; 4,41 - thio bis (2 - methyl phenol) or 4,41 - thio bis (3 - methyl, 6 - t - butyl phenol).  The polypropylene preferably has a melt viscosity at 190 DEG  C. of from 5 X 104 to 5 X 106 poises.  The compositions may be used for the moulding of bottles, buckets, bowls and electrical equipment.
Patent GB-676689-A (GB)
Title: An axle box
Inventor: AMERY ROBERT CECIL
IPC: B61F15/06
Filed: 1949-02-17
Abstract: 676,689. Bearings. HOFFMANN MANUFACTURING CO., Ltd. Feb. 15, 1950 [Feb. 17, 1949], No. 4372/49. Class 12 (i). An axle-box of the built-up type comprises a two-part shell housing f, f<SP>1</SP> for bearings b, b<SP>1</SP>, disposed in two load plates e and welded thereto at g, and welded to each other at h. The half shell housings are arranged to be sprung into position before welding. Wear plates which also act as stiffeners to the load plates e are provided.
Patent GB-590807-A (GB)
Title: Improvements in or relating to fire or heat detecting systems or devices
IPC: H01H39/00
Filed: 1945-02-21
Abstract: 590,807. Press-button retractive switches; actuation of switches. GLENDINNING, W. G., MacLENNAN, A. M., MATHISEN, A., and GRAVINER MANUFACTURING CO., Ltd. Feb. 21, 1945, Nos. 4388 and 16578. [Class 38 (v)] A fire or heat detecting device comprises a switch and a substance 24 such as gunpowderimpregnated cotton or fabric strip which decomposes under the influence of heat and evolves a gas, the pressure of which actuates a piston 18 which presses down a plunger 29 against spring action, so causing a contact 31 to ride out of a recess 30 and engage a contact 39 to complete an alarm circuit, or operate a fireextinguisher, or stop the operation of overheated equipment. The plunger may be manually operated for testing, by means of an extension 36, covered by a flexible cup 37. A rubber guide disc 21 for the piston rod 20 renders the cylinder 19 damp-proof. A cover 12 enables replacement of the piston 18, cylinder 19 and detector 24 after operation. The plunger 29 and contacts 31, 39 are contained in a moulded insulating casing 13. The first Provisional Specification states also that the detector 24 may be contained in a copper or copper alloy capillary tube.
Patent GB-948361-A (GB)
Title: Improvements relating to potato lifting machines
IPC: A01D17/00
Filed: 1961-02-06
Abstract: 948,361. Root crop harvesters. P. J. PACKMAN. April 9, 1962 [Feb. 6, 1961], No. 4393/61. Heading A1F. A machine for lifting root crops comprises a share 6 with sides 7 arranged to lift a ridge of earth and crop and a divider 9 which deflects the ridge on to two transversely spaced saucer-shaped riddles 15 whose receiving surfaces are arranged to travel rearwardly at a speed greater than the forward speed of the machine to move the riddled crop on to a further conveyer 18 consisting of a number of overlapping star-shaped rubber wheels 19. The riddles are driven from the power take-off 20 of a tractor through a gear box 24 and the conveyer 18 is driven through a separate gear box 41. The machine is supported on rear wheels and has a tow-bar connection for a tractor. A further conveyer may be fitted to carry the crops directly to a hopper. Specification 584,502 is referred to.
Patent GB-682585-A (GB)
Title: Improvements in and relating to electrical feeds for machine tools and log saws
IPC: B23Q15/00
Filed: 1949-02-18
Abstract: 682,585. Electric control systems. BRITISH THOMSON-HOUSTON CO., Ltd., and JEFFERSON, H. F. Feb. 16, 1950 [Feb. 18, 1949], No. 4497/49. Class 40 (i) [Also in Group XXII] The feed drive motor of a machine tool, e.g. a planing machine or a log saw, is controlled through a selsyn system by a control lever adapted to be reciprocated between mechanical stops. As shown in Fig. 1, a continuously running shaft 2 driven by a pilot motor 1 or other source, drives, or tends to drive, a shaft 11 through an eddy current clutch 3 and gearing 8, 10, in the direction of the arrow. Normally, with the clutch 3 de-energized, the shaft 11 is biased by a spring 20 to a zero position in which a radial arm 19 on the shaft engages a stop disc 21. The stop disc is an eccentric rotatably adjustable by a knob 22 to adjust this zero position. When the clutch is energized the shaft 11 is driven in opposition to the spring 20 until the radial stop arm 19 engages a further stop 25 carried by a spindle 26 rigid with a pointer arm 27 for adjusting the stop. The stop arm 19 is held against the stop 25 until the clutch is de-energized when the shaft 11 is rotated back to zero by its spring 20. Thus, periodic energizations of the clutch cause sequential rocking-forwards and backwards-of the shaft 11 which steps the selsyn transmitter 18 forward at each clutch energization through a freewheel device 50. As shown in Fig. 2, each closure of the switch 37 energizes the clutch 3 to step the selsyn transmitter 18 through a fixed but adjustable angle as above described. The resultant error voltage from the receiver 29 controls the D.C. feed motor 30 through a phasesense sensitive rectifier 45, 46, 48, the motor resetting the selsyn receiver directly or through gearing. The D.C. control signal may be amplified at 31 and, if necessary, the error signal may be amplified at 51.
Patent GB-1469039-A (GB)
Title: Elongate composite aritcles
IPC: A63B49/10
Filed: 1975-02-03
Abstract: 1469039 Moulding composite articles FANSTEEL Inc 3 Feb 1975 [13 Feb 1974] 4499/75 Heading B5A [Also in Division A6] Elongate composite articles (e.g. for shaping into tennis racket frames, bows, golf and hockey sticks, skis, helmets, shin and shoulder guards) comprising a foam resin core 22 and a shell 17 which includes two or more layers of resin coated unidirectionally orientated graphite fibres, at least one of the layers having its fibres oriented in a direction different from those in another layer, are moulded by (a) wrapping an extruded core of foamable plastics with a layer of resin coated fibres and placing the wrapped core in a heated mould to expand the core and bond it to the fibre wrapping, or (b) lining a mould with a layer of resin coated fibres and introducing the foamable core or injecting foamable plastics into the mould, the pressure of foaming and/or the injection pressure causing bonding to the fibre layer. To make a tennis racket a foamable resin core 22 is helically wrapped with four layers of resin coated graphite fibres, the fibres in successive layers being inclined at opposite angles of 45 degrees. The core is bent to lie around a mould cavity forming an eliptical head 11 with the ends of the core extending parallel to each other in two handle forming portions of the cavity. Another wrapped core 18 is spliced across to complete the elipse of the head and strips 16 having fibres aligned with the core are applied to both faces of the frame before the whole mould assembly is placed in a heated press or clamped and placed in an oven. The mould has pins to form holes 23 for stringing the racket. The resin on the fibres is a nylon, polyolefin, polycarbonate, acetal resin, linear or crosslinked polyester, phenolic resin, or a cyclized epoxy novolac resin.
Patent GB-163445-A (GB)
Title: Improvements in bricks, blocks, slabs, tiles, and the like for building, flooring, paving and other structural purposes
IPC: E04F15/04
Filed: 1920-02-13
Abstract: 163,445. Hester, B. R. Feb. 13, 1920. Compound bricks. - Composite bricks, blocks, tiles, &c. with a concrete back and a wooden face are formed with interengaging means on the edges. The concrete back is provided with projections 3, 4 on one end and edge to engage corresponding recesses 5, 6 on the end and edge of the adjacent blocks. The top surface of the concrete blocks may be tarred to render it waterproof. The wooden surface is secured by means of metal-ties 7 in the concrete engaging undercut grooves on the wood, Fig. 12, or by dovetail projections on the concrete engaging corresponding undercut recesses in the wood.
Patent GB-1089882-A (GB)
Title: A process for sulphonating and/or sulphating organic compounds containing one or more hydroxyl groups
IPC: C07C305/00
Filed: 1965-02-02
Abstract: 1,089,882. Controlling chemical reactions. MO OCH DOMSJO A.B. Feb. 2, 1965 [Feb. 4, 1964], No. 4559/65. Heading B1X. [Also in Division G3] In a process for sulphonating and/or sulpating an alkyl or alkylaryl compound containing one or more hydroxyl groups, and alkylene oxide adducts thereof, or mixtures containing these compounds, by reaction with a sulphur trioxide gas mixture in a reactor 1, the sulphonating and/or sulphating degree is controlled by signals obtained from a conductivity measuring cell 13 arranged in the product outlet flow, in such a way as to keep the conductivity of the reaction product added constant. A relation between the conductivity and the sulphonating degree is shown graphically in Figs. 1-3 (not shown) and therefrom the correct conductivity for any desired sulphonating degree may be inferred, and so the correct amount of unsulphonated substance introduced. A control device 14 maintains the conductivity at a set value, any deviation causing valve V to alter the feed of unsulphonated substance. A cyclone 12 separates any residual gas from the product prior to cell 13.
Patent GB-702152-A (GB)
Title: Improvements in or relating to circuits for reducing pulse interference in radio receivers
IPC: H03G11/02
Filed: 1951-02-26
Abstract: 702,152. Limiters. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 26, 1951 [March 1, 1950], No. 4647/51. Class 40 (6) In a noise limiter circuit of the type in which an input impedance is connected in series with a rectifying component, e.g. a diode, and a capacitor which shunts the output terminals of the circuit, the rectifying component being normally so biased that desired signals can be transmitted through the circuit but pulses having steep wave-fronts cause the rectifymg component to become momentarily non-conductive, the input impedance is the cathode resistance of a discharge tube arranged as a cathode follower whereby both desired signals and interfering pulses are fed into the circuit. As shown in Fig. 1, to suppress pulses of negative polarity a diode 3 is connected to the cathode resistor 2 of the cathode-follower 11, the diode 3, triode 11, and a high resistance 6 shunted by a capacitor 4 being in series with the H.T. supply so that a small direct current component flows through the diode 3. This permits signal currents to be transmitted but negative pulses are limited by the diode 3. Both positive and negative pulses may be eliminated by two oppositely connected diodes in series, Fig. 2 (not shown). In an alternative arrangement, Fig. 3, the triode portion of the diode-triode 8 has the same function as the resistor 6 of Fig. 1 and under the normal conditions the diode 3 passes a current primarily determined by the impedance of the triode which is chosen to be high. Through the resistor 9 a positive bias is applied to the diode of the valve 8 so that the resistance of this diode for all signal voltages is negligible. The value of the resistor 9 considerably exceeds the impedance of the capacitor 10 and this auxiliary circuit passes a current proportional to the variation of the input voltage with time. An interfering negative pulse makes both diodes non-conducting and the pulse voltage on the control grid of the triode renders it also non-conducting. The capacitor 4 is thus isolated and retains a voltage approximating to that of the signal at the instant when the pulse was suppressed. This arrangement may be made more sensitive by including an additional diode in series with the triode 8, Fig. 4 (not shown). In a modification for suppressing positive pulses, Fig. 5, the auxiliary diode 21 is connected to a negative voltage source through a resistor 9 and the diode 14 is connected to a positive voltage source through a resistor 15, the D.C. path for the diodes 3, 14, being completed by a resistor 23. Under normal conditions all the diodes are conducting, but when a positive pulse occurs the diodes 3 and 21 cease to conduct, and the valve 8 becomes highly conducting causing its anode potential to fall and the diode 14 to become non-conducting. The output capacitor 4 is thus isolated and retains its charge during the occurrence of the pulse.
Patent GB-205762-A (GB)
Title: Improvements in means for connecting branch pipes to mains
IPC: F16L41/10
Filed: 1923-02-17
Abstract: 205,762. Blakeborough, J. E., Broadhead, J. B., and Wood, T. Feb. 17, 1923. Branches and mains, connecting. - In a branch to main connection in which a ferrule c, closed by a screwed plug d, is screwed into the opening b in the main a, a branch fitting being screwed to the ferrule and having a screwed passage in line with the axis thereof, before screwing on the branch fitting the squared or angular projection f<2> of a screwed boss f<1> carried by a spindle f is inserted in a correspondingly shaped opening d' in the plug. The branch fitting e with an internally screwed passage e<3> is then screwed to the ferrule, the boss f<1> and the ferrule having corresponding threads. The branch fitting is closed by a stuffing box g<1> on the cap g. Rotation of the spindle may then withdraw the plug d past the outlet e<2> to open up the waterway. The plug d may be formed with an extension d<2> and a cutting edge d<4> pointed or annular, so as to remove any obstruction which may choke the waterway. If necessary, when the plug is withdrawn beyond the outlet e<2>, the spindle and stuffing box may be removed, and a plain cap substituted.