baber/WOPTO huggingface dataset:
Patent GB-1432903-A (GB)
Title: Process for the preparation of cyanopyridines
IPC: C07D213/85
Filed: 1974-08-09
Abstract: 1432903 Cyanopyridines LONZA Ltd 9 Aug 1974 [10 Aug 1973] 35133/74 Heading C2C Cyanopyridines are obtained by reacting alkyl pyridines with oxygen or air and ammonia in the gas phase, the molar ratio of ammonia to alkyl pyridine being 3À5 : 1 to 12 : 1, in the presence of a catalyst which is pure vanadium pentoxide with a particle size of 50 to 500Á and a specific surface area of up to 10 m.<SP>2</SP>/g., the reaction temperature being defined by the equation T being the reaction temperature in  C., S being the specific surface area in m.<SP>2</SP>/g., m being a factor of from - 4 to - 6 and b being a number from 320 to 322.
Patent GB-1064121-A (GB)
Title: Improvements in and relating to radio relay and like  systems
Inventor: SMITH DAVID HESELTINE
IPC: H04B7/185
Filed: 1962-09-14
Abstract: 1,064,121. Radio signalling. COMMUNICATIONS CONSULTANTS Ltd. Sept. 5, 1963 [Sept. 14, 1962], No. 35163/62. Heading H4L. A radio relay or like system comprises a transmitter transmitting at least two different radio-frequency waves at least one of which is modulated and a relay station having means for deriving from these waves independently of any local oscillator at the relay station and radiating a signal of a radio-frequency different from either of the two waves. In one form the relay station comprises means for deriving a wave equal to the sum or difference of the received waves and radiating that wave or a multiple thereof. When one of the received waves is frequency-modulated the relay station is provided with a mixer for deriving a sum or difference wave from the received waves the output of the mixer being coupled through two parallel branch circuits, one including a narrow pass-band filter and frequency multiplier, to a second mixer providing the signal for radiation. This arrangement ensures that the frequency deviation is the same as in the received wave. The arrangement may be applied to a system including a plurality of relay stations and three or more channels A, B, C operating on adjacent radio-frequencies between the main stations. For example, channel A signals after passing through a narrow pass-band filter to remove the modulation may be mixed with the channel C signals, the resultant signal being suitably multiplied for transmission, and similarly for the other channels. In another embodiment in which a number of responder stations are required to transmit to a common central station the central station transmits waves at two different carrier frequencies at least one of which is modulated. At each station the two waves are mixed and a further wave derived as previously described, all these derived waves being locked to the waves transmitted from the central station. Suitable phase shifters are included at each remote station to compensate for varying distances from the central station, and gating pulses may be derived from the received waves at the remote stations so that the signals are sent back in time division multiplex. Alternatively, frequency division multiplex may be used. In a further arrangement an aircraft transmits two phase-locked carrier waves one being amplitude or phase modulated for recognition purposes and the other pulse modulated. A ground station receives these waves and from them generates a pulse carrier wave differing in frequency from the received waves as previously described. The aircraft receives this wave and compares the phase of the pulse modulation with that transmitted, the phase difference being a measure of range and the rate of change of phase a measure of speed.
Patent GB-1218587-A (GB)
Title: Oxidative degradation
Inventor: CAIN MAURICE EDWARD
IPC: C08K5/18
Filed: 1968-07-23
Abstract: 1,218,587. Antiozonants for rubber. NATURAL RUBBER PRODUCERS' RESEARCH ASSOCIATION. 17 July, 1969 [23 July, 1968], No. 35194/68. Headings C3E and C3Q. [Also in Divisions C2 and C5] A natural rubber vulcanizate composition contains as an inhibitor or retarder of oxidative degradation a compound of the Formula I or II where R 1 -R 7  are the same or different and each represents a hydrogen atom or a hydrocarbyl radical which may contain hetero atoms, and in addition in Formula I, R 1 -R 4  may form one or more aromatic rings fused to the aromatic ring shown in the formula, R 5  and R 6  together with the nitrogen atom may form a heterocyclic ring which may contain further hetero atoms, R is a hydrogen atom or a hydrocarbyl radical which may contain one or more functional groups, provided that each R group contains not more than 100 carbon atoms with the proviso that at least one R is other than a hydrogen atom. Specific examples include N,N-dimethyl-N<SP>1</SP>-(1- ethyl - 2 - methyl propen - 2 - yl) - p - phenylene diamine, 1 - hydroxy - 4 - (1 - ethyl - 2 - methyl propen-2-ylamino)benzene and the reaction products of p-nitrosodiphenylamine with polybutene and palm, castor, tung, rapeseed and pilchard oil and with oleic acid, the final product acting as a curing activator.
Patent GB-1267648-A (GB)
Title: Gas blast circuit breaker
IPC: H01H33/56
Filed: 1970-07-21
Abstract: 1,267,648. Gas blast circuit breakers. BROWN, BOVERI & CO. Ltd. 21 July, 1970 [23 July, 1969], No. 35222/70. Heading HlN. In a gas blast circuit breaker the arc extinguishing blast passes from a high pressure chamber 5 through a first isolating valve and a blast valve 9 into a low pressure chamber 3 and then through a second isolating valve into a support insulator 1, the isolating valves being jointly operated by a single control member. The isolating valves comprise ports 6a, 6b, in respective parts 6, 6c of a tubular slider, registering with respective fixed ports 2b, 7a in cylinders 2a, 7b. The slider is held in the valve-open position, shown to the left of the Figure, by means of nuts threaded on to studs 12 projecting through cap 11. When released, the slider assumes the valve-closed position isolating the low pressure chamber 3. The switching chamber is located at 4 on the low pressure chamber, an insulating rod 10 operating the blast valve 9. A tube 8 maintains the pressure of the gas, which may be sulphur hexafluoride, in the chamber 5.
Patent GB-1014527-A (GB)
Title: Improvements in or relating to devices for generating a persisting current in a superconductive circuit
IPC: G11C11/44
Filed: 1963-09-09
Abstract: 1,014,527. Dynamo - electric generators. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Sept. 9, 1963 [Sept. 12, 1962], No. 35476/63. Heading H2A. A continuously circulating current is generated in a superconductive circuit comprising coil 1 wires 2, 3 and plate 6 when magnet 7 is rotated around the junction point 5. Plate 6 is of soft superconductive material, i.e. having low critical field such as tin or lead so that the field of magnet 7 is sufficient to cause a " normal " area 10 to be produced where the flux passes through the plate. When the magnet is rotated this flux links with the closed superconductive circuit and generates a current. If further revolutions of the magnet are made in the same direction the current will increase and reverse rotation will reduce the current. The plate and flux pattern may be of any shape provided that a closed path always exists between points 4 and 5. If the magnet oscillates about a line joining points 4, 5 a cyclically varying current is produced. Wires 2, 3 and coil 10 are made of " hard " superconductive material, e.g. Nb 3 Sn or NbZr.
Patent GB-975495-A (GB)
Title: Process for the production of alkali metal salts of nitrilo triacetic acid
Filed: 1963-09-09
Abstract: Alkali metal salts of nitrilotriacetic acid are prepared by adding a mixture of hydrogen cyanide and formaldehyde to a solution of aqueous ammonia and an alkali metal hydroxide while maintaining the temperature at 40 to 55 DEG C., subsequently raising the temperature to 100-105 DEG C., adding sufficient formaldehyde to eliminate excess hydrogen cyanide and recovering the reaction product. The mixture of hydrogen cyanide and formaldehyde contains an excess of about 10 to 20% of hydrogen cyanide and is added at a constant rate to the aqueous alkaline solution.  Sodium hydroxide is the preferred alkali metal hydroxide. Nitrilotriacetic acid may be obtained from its trisodium salt by treatment with hydrochloric acid.  Examples describe the preparation of trisodium nitrilotriacetate and its conversion to the free acid. Disodium iminodiacetate and sodium glycinate are obtained as by-products.
Patent GB-763619-A (GB)
Title: Improvements in and relating to internal combustion engines and exhaust gas silencers therefor
Inventor: KROLL HARLEY E
IPC: F01N13/18
Filed: 1953-12-21
Abstract: 763,619. Mowing machines. TORO MANUFACTURING CORPORATION. Dec. 21, 1953 No. 35539/53. Class 6(3). [Also in Group XXVII] An engine 8 for a lawn mower is mounted on a support plate 14 which forms with a member 15 an exhaust silencer having an inlet opening 26 in the plate 14 and discharges orifices 35, 36 in the member 15 and the engine drive shaft 9 passes through a central opening in the silencer chamber formed by a tubular member 18 integral with the plate 14 and engaging the member 15 in a fluid-tight manner. The support plate 14 is mounted on the casing 5 of a lawn mower having a rotary cutter blade 10 driven by the vertical drive shaft 9. Ribs 20 ... 23 which extend from the plate 14 to the sleeve 18 and have their edges spaced from the member 15 divide the silencing chamber into an entry chamber 37 communicating past the ribs 20, 23 with three intercommunicating discharge chambers 38 40 from which the exhaust gases escape through the orifices 35, 36, which direct the escaping gases towards the ground, thereby enhancing the silencing action. Strengthening ribs 24, 25, are also provided on the member 14 and the member 15, which is held by bolts 33 to the member 14, has its ends 29, 31, flanged to receive the end of the sleeve 18 and a flange 19 on the member 14, gaskets 30, 32 being provided to make fluid-tight seals. Liquids condensing in the silencer drain off through the lower outlet orifices 35 and the air currents set up by the rotary motion of the blade 10 flow downwards past the orifices 35, 36.
Patent GB-434069-A (GB)
Title: Improvements in or relating to flat shaking separating screens for the manufacture of wood pulp, cellulose, esparto and the like
IPC: D21D5/04
Filed: 1934-12-11
Abstract: 434,069. Strainers. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Voith, W., Voith, H., and Voith, H., (trading as Voith, J. M., [Firm of]), Heidenheim-on-Brenz, Wiirtemberg, Germany. Dec. 11, 1934, No. 35612. [Class 46] [See also Group II] Apparatus for sifting or straining materials suspended in liquid, such as wood pulp &c. comprises a screen 1 having a gyrating motion at the feed end and an upwardly and forwardly inclined reciprocating motion at the discharge end, in combination with a trough 3 having an overflow for the screened material which is set so that its surface is maintained about'the level of the mean position of the screen. In the example described with reference to the Figure, the screen is driven directly by eccentrics 6 on a shaft 7 and is supported at its forward end by inclined links 9. According to a modification, the screen is supported by leaf springs from a bar in turn supported on helical springs and carries a shaft with rotary unbalanced weights. The forward end of the screen is supported by inclined leaf springs. In both constructions, the underside of the screen has depending boards 14 which dip permanently into the pulp in the trough.
Patent GB-1110568-A (GB)
Title: A process for the production of blue iron cyanide complex pigments
Inventor: KRUGER JOACHIM
IPC: C01C3/12
Filed: 1966-08-09
Abstract: Blue iron cyanide complex pigments are prepared by oxidizing Berlin White (potassium or ammonium ferrous ferrocyanide) which has been precipitated by the reaction between aqueous solutions of potassium or ammonium ferrocyanide and of a ferrous salt, the precipitation being carried out so that when it is completed no excess of ferrous salt is present in the supernatent liquid. Preferably, no excess of the alkali metal ferrocyanide is present and the precipitate is formed in an oxygen free atmosphere, e.g. nitrogen, at 60-100 DEG  C. The addition of soluble ammonium or potassium salts slows down the ageing rate and leads to pigments of high colouring power.  In an example the Berlin White is oxidized using hydrogen peroxide.
Patent GB-492233-A (GB)
Title: Improvements in index cards, particularly for vertical filing systems or vertical card indexes
IPC: B42F17/08
Filed: 1937-12-24
Abstract: 492,233. Card indexes. FRIEDRICH, L. Dec. 24, 1937, No. 35729. Convention date, Dec. 28, 1936. [Class 146 (i)] A guide card for a vertical card index consists of a sheet 1 of transparent material with foldedover edges forming a sheath, and a tablet 3, adapted to be slid into the sheath, having a series of pockets 4 in which are placed strips 5 with inscriptions relating to the cards forming the card index. The pockets 4 are formed by securing a length of folded paper to the tablet by adhesive.
Patent GB-819247-A (GB)
Title: Manufacture of ethyl chloride and higher chlorinated ethanes
IPC: C07C19/10
Filed: 1955-12-13
Abstract: Ethyl chloride is prepared, with or without higher chlorinated ethanes (e.g. 1 : 1- and 1 : 2-dichloroethane), by a combined hydrochlorination of ethylene and chlorination of ethane in which the hydrogen chloride formed in the latter step is employed in the former, the amount of ethane used being in excess of that theoretically required for the chlorination and the amount of chlorine fed to the chlorination reactor being so adjusted that the amount of hydrogen chloride developed therein and fed to the hydrochlorination reactor is in 1-15 per cent excess over that theoretically required for the hydrochlorination of the ethylene present in that particular feed.  Advantageously a gaseous stream of hydrocarbon containing ethane and ethylene is fed via a purification tower (wherein it is freed from lighter hydrocarbons) into the hydrochlorination reactor, wherein it is treated with ethane and hydrogen chloride from the chlorination reactor, the material (predominantly ethyl chloride and ethane) flowing from the hydrochlorination reactor is (preferably after removal of the ethyl chloride in a separating tower) recycled in its entirety to the chlorination reactor, or part only is so recycled and the remainder recycled via the tower to the hydrochlorination reactor and/or discharged from the system. Alternatively two gaseous streams of hydrocarbon, one containing predominantly ethane and the other predominantly ethylene, are introduced through separate purification towers, or the two streams may even consist of substantially pure ethane and ethylene respectively, the purification towers being dispensed with.  When a product which is predominantly ethyl chloride is desired, the molar ratio of chlorine:ethane should be maintained between 0.2 and 0.5.  Suitable arrangements of apparatus are described with the aid of drawings, and detailed examples are given. Specification 778,029 is referred to.
Patent GB-946937-A (GB)
Title: Improvements in universal couplings
Inventor: FOLKARD FREDERICK JAMES
IPC: F16D3/46
Filed: 1960-10-18
Abstract: 946,937. Universal joints. J. S. & F. FOLKARD Ltd. Oct. 17, 1961 [Oct. 18, 1960], No. 35758/60. Heading F2U. A universal joint, for shafts of remotely controlled bench fittings such as valves, comprises two forked members 1 and an intermediate member 3, all of hardenable high-tensile resilient plastic, snapped together in retained pivotal engagement. The forks 1 may, as shown, have internal ribs 5, engaging grooves 4 in the spherical intermediate member 3, or in Fig. 2 (not shown) have trunnion pins snapping into holes in the intermediate member, such holes having lead-in grooves. In Fig. 4 (not shown) these trunnion pins have enlarged heads which snap through holes in a cube-shaped hollow intermediate member and subsequently expand to prevent withdrawal.
Patent GB-941603-A (GB)
Title: Golf bag trolley
Inventor: WHEELER LESLIE WILLIAM
IPC: B62B1/04
Filed: 1962-09-21
Abstract: 941,603. Collapsible golf bag carriers. SHELFORD ENGINEERING CO. Ltd. Sept. 21, 1962, No. 35937/62. Heading B7B. The legs 18, 19 of a collapsible golf bag carrier are pivoted at 20 between parallel V- shaped plates 16, 17, secured on either side of the backbone 1 and the legs are extended by struts 25 pivoted at 27 to a member 28 which slides in a slotted guide 29, the member 28 being reciprocated by a push rod 34 pivotally connected at 35 to the handle 37. The spring-urged catch 40 retains the trolley in its erected condition.
Patent GB-519663-A (GB)
Title: Forms for the construction of floors of concrete, hollow blocks or the like
IPC: E04G11/38
Filed: 1938-12-09
Abstract: 519,663. Beam centering for floor construction. SMEDEGAARD, E. J. Dec. 9, 1938, No. 35966. [Classes 20 (i) and 20 (ii)] Formwork for use in the construction of concrete and block floors or ceilings comprises cranked metal plates 29 supported on extensible horizontal beams 22, 23, the plates overlapping oneanother in the transverse and longitudinal directions to suit different shapes and sizes of floor area, and telescopic posts 10 supporting the beams at any desired height. The post members 13 are tapered and slide in a band clip 14 when the clamping screw 15 is eased. A scale 17 is provided on the member 13. The beam elements 22, 23' may be relatively inclined to provide a camber to the floor.
Patent GB-177256-A (GB)
Title: Improvements in screw-and-nut mechanism
IPC: B66F3/16
Filed: 1920-12-22
Abstract: 177,256. Bullis, F. J. Dec. 22, 1920. Presses, mechanical.-Screw-and-nut mechanism for actuating a press comprises a pair of screw-threaded members adapted to work one within the other, one member having a fast thread and the other a slow thread, and a rotatable nut adapted when actuated to move both members rectilinearly until one member engages the work, when the other member is caused to rotate while the work-engaging member continues its rectilinear movement. The slowthreaded screw 30<a> is screwed into a hollow quick-threaded screw 20<a> actuated by a nut 8<b> driven through bevel gears by a shaft 9<a>. An arm 40<b> adjustably mounted on a stem 40a secured to the screw 30<a> passes between vertical guides 1<a> and prevents the rotation of the screw. The guides are connected at the top by a loop 1<e>. In a modification, the quick-threaded screw is mounted in the slow-threaded screw and the shaft 9<a> is provided with a crank arm for rapid rotation with ratchet means for slow turning.
Patent GB-1037377-A (GB)
Title: Naphthoylene-arylimidazole disperse dyestuffs
Inventor: SENSHU HISASHI
IPC: C09B57/12
Filed: 1964-09-02
Abstract: The invention comprises disperse dyestuffs having the general formula <FORM:1037377/C4-C5/1> wherein R denotes an alkyl, aryl or cycloalkyl group which may contain substituents other than sulpho groups and carboxyl groups; and Ar is either a benzene nucleus, which may contain substituents as above, the nitrogen atoms being linked to two adjacent carbons of the benzene nucleus, or a naphthalene nucleus which may be substituted as above, the nitrogen atoms being linked to two carbon atoms of the naphthalene nucleus in ortho or peri relationship. The novel dyestuffs may be made by heating a compound of formula <FORM:1037377/C4-C5/2> wherein X denotes a halogen atom, or sulphogroup or an alkali metal salt thereof with a compound ROH in the presence of a base, preferably in a temperature range of 60-150 DEG C.
Patent GB-386112-A (GB)
Title: Improvements in filters for air and other gases
IPC: B01D46/24
Filed: 1931-12-31
Abstract: 386,112. Dust-filters. FFENNELL, K. S. MOLYNEUX-, and BENJAMIN ELECTRIC, Ltd., Brantwood Works, Tariff Road, Tottenham, London. Dec. 31, 1931, No. 36077. [Class 8 (ii).] A filter comprises a number of layers 1 of wire gauze &c. adapted to be wetted with dirtcollecting substance, the layers being spaced apart slightly, e.g. by doubling their margins as at 1a, and the composite screen corrugated or undulated as a whole.
Patent GB-1203057-A (GB)
Title: Improvements relating to camera systems
Inventor: BARR JOHN DENZIL
IPC: G05D3/14
Filed: 1967-08-07
Abstract: 1,203,057. Lens focus control automatic speed control. RANK ORGANISATION Ltd. July 15, 1968 Aug.7, 1967], No.36122/67. Headings G2J and G3R. In a television or motion picture camera 7, Fig.1, the depth of field varies with aperture setting and accordingly a variable transmission is interposed between a focus demand 2 and a focus control 8, 10, 12, the variable transmission being coupled to the aperture setting, and in a zoom objective, also coupled to the focal length adjusting mechanism. As shown, a manually operated handwheel 2 is coupled through step-up gearing 3 to a tachogenerator 6 accommodated in housing 9 on the side of the camera 7. The output of tachogenerator 6 is fed into an electrical servo device 11 comprising a motor 8 whose output shaft is directly coupled to a second tachogenerator 14 and coupled through gearing 12 to the focus adjusting portion 10. The difference between the outputs of tachogenerators 6, 14 is fed to an amplifier (16), Fig. 2 (not shown) whose output controls motor 8, there being potentiometers 18, 20 controlled by gearing 22, 26 respectively coupled to the iris setting and focal length adjusting mechanisms, which may be arranged in circuit with tachogenerators 6, 14 and amplifier (16) in various arrangements Figs. 2-4 and 6 (not shown). Alternatively the iris and focal length settings may control the gain of amplifier Figs. 7 and 8, (not shown). In a mechanical embodiment, Fig. 5, rotation of focus demand handle 50 and thus of cylinder 52 causes rotation of wheel 54 and its attached cylinder 60 whose extent of longitudinal movement and thus of focus control 64, 66 depends on the skew angle of rollers 80 controlled by the setting of iris 70 and zoom element 68.
Patent GB-834672-A (GB)
Title: Improvements in or relating to the classification of solid particulate materials
IPC: B03B5/62
Filed: 1956-11-26
Abstract: 834,672. Washing granular materials; pneumatic separating. CHARBONNAGES DE FRANCE, and ETABLISSEMENTS NEYRPIC. Nov. 26. 1956. [Nov. 25, 1955; Jan. 11, 1956; March 2, 1956; Nov. 15, 1956], No. 36146/56. Classes 82(2) and 117 Mixtures of pulverulent solids are separated into the constituents in accordance with S.G. or size by passing them into a moving body of fluid the rate of flow of which being between the limiting velocities for deposition of the two constituents and forming a dune of unseparated material in the fluid. The tendency for the dune to move upstream is balanced by a contrary movement of the surface on which the dune forms. Material enters at 6 and meets fluid flow in the direction of arrows F 1 . A dune forms at F 4  and the conveyer belt 2 moving in the direction of arrows F 3  maintains it stationary. Heavy material falls on the conveyer and is carried to discharge at C. Light material (or fine particles) is entrained in the liquid and discharged at B. Instead of a conveyer a vibrating bottom of the conduit can provide the necessary counterbalancing action on the dune. Apparatus for rewashing the heavy material is also disclosed.