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    • 1. 发明申请
    • ELECTRICAL CIRCUIT UTILIZING AVALANCHE TRANSISTOR FOR GENERATING AND TRANSMITTING SINE-WAVE ENERGY PULSES
    • 用于产生和发送正弦波能量脉冲的AVALANCHE晶体管的电路
    • WO1996015590A1
    • 1996-05-23
    • PCT/US1995014683
    • 1995-11-13
    • MORGAN, Harry, ClarkBOYD, William, Harsha
    • H03K07/04
    • H04B1/24H03K7/04H03K9/04H03K11/00H04B1/04
    • A method and apparatus are shown for generating and transmitting very short and widely separated high frequency sine-wave pulses of electromagnetic energy into space. A transistor (TR3), a charging capacitor (C8), and an inductor (L1) are coupled into a first series loop path to form a discharge circuit. A bias voltage source (52), the same charging capacitor (C8), and a charging resistor (R13) are coupled into a second series loop path to form a recharging circuit. The bias voltage source is selected to be capable of biasing the forward conduction path of the transistor near its breakdown condition. The transistor is intermittently triggered into its breakdown or avalanche mode, and an antenna (56) is coupled to the inductor (L1) for transmitting the energy pulses.
    • 示出了一种方法和装置,用于将非常短且广泛分离的电磁能量的高频正弦波脉冲发射到空间中。 晶体管(TR3),充电电容器(C8)和电感器(L1)耦合到第一串联环路径中以形成放电电路。 偏置电压源(52),相同的充电电容器(C8)和充电电阻器(R13)耦合到第二串联环路径中以形成再充电电路。 偏置电压源被选择为能够在其击穿条件附近偏置晶体管的正向导通路径。 晶体管被间歇地触发到其击穿或雪崩模式,并且天线(56)耦合到电感器(L1)以传送能量脉冲。
    • 3. 发明专利
    • Improvements relating to presses for consolidating finely divided materials
    • GB693450A
    • 1953-07-01
    • GB2500650
    • 1950-10-13
    • FRED HARRY CLARKCHARLES ARTHUR LEES
    • B30B15/00
    • 693,450. Compression - moulding machines. CLARK, F. H., and LEES, C. A. Oct. 15, 1951 [Oct. 13, 1950], No. 25006/50. Addition to 669,835. Class 87 (ii). The parent Specification describes a press for consolidating finely-divided material in a mould the air being removed from the material by vacuum before it is consolidated by pressure. It has been found that when the mould is put under vacuum there is a tendency for the bottom die (the article-ejector) to be sucked upwards, and the present invention seeks to remedy this by holding the die down. The die is secured to the upper end of a vertical plunger a, and this plunger is held down, during the application of the vacuum, by two hooks r which engage rollers q mounted in lugs p secured to the plunger. The hooks are mounted on fixed pivots t and are pulled together by a spring (not shown) engaged in holes v in the hooks. When the consolidation has been effected and the moulded article is to be ejected, a manually-operated lever (not shown) engaging in a slot k in a sleeve j is raised, whereby chamfered edges x on the upper end of the sleeve engage rollers w on the hooks and cam them aside, the hooks being thus moved aside off the rollers q and a spring n urging the plunger a upwardly to eject the article. The retaining edges y of the hooks are struck from centres z displaced inwardly from the centres of the pivots t, so that as the hooks move inwardly they pull down on the rollers q to seal the bottom of the mould. An extension e of the plunger has a pin l which moves in a slot m in the fixed support s on which the hooks are pivoted. If the rollers q are to rise above the hooks, the upper ends of the hooks may have rollers by which the hooks may be moved apart by descent of rollers g.
    • 4. 发明专利
    • Manufacture and use of dehydrated lactic acid
    • GB620320A
    • 1949-03-23
    • GB2923246
    • 1946-10-01
    • HOWARDS & SONS LTDLEONARD HAROLD ADCOCKGEORGE CHARLES HARRY CLARKRITCHIE HART LOCK
    • C07C51/48C08G63/06
    • A solution of anhydro-condensation products of lactic acid free from sugars, gums and inorganic salts is obtained from commercial aqueous lactic acid by removing water from it until the dehydrated acid is soluble in an aromatic, hydroaromatic or paraffin hydrocarbon solvent, dissolving it in the solvent as it is formed or after its formation, and separating the resulting solution from insoluble material. Benzene, toluene, xylene, cyclohexane, white spirit, or petroleum ether may be used as solvent. The water may be removed by distillation under reduced pressure, or in the presence of an entrainer. In the latter case the hydrocarbon solvent may be used as entrainer. In an example, "fermentation" aqueous lactic acid containing 7.7 parts by weight of C3H6O3 was boiled with excess xylene in a vessel fitted with a condenser and separator from which the xylene layer was returned to the vessel. Boiling was continued until the xylene contained in solution 7.42 parts of dehydrated lactic acid (calculated as C3H6O3). The solution was decanted from insoluble matter, and the xylene removed by evaporation. In another example, 75 per cent lactic acid was concentrated by evaporation under reduced pressure until it contained 106.2 per cent C3H6O3. The solution was then boiled under reflux for 30 minutes with about 4 parts of xylene. The solution was decanted off and the residue refluxed with a further quantity of xylene. The extraction was repeated 4 more times. In a further example, the aqueous lactic acid was boiled with benzene in a vessel fitted with a condenser and separator. The supernatent benzene solution in the vessel was continuously withdrawn and transferred to a second vessel from which the benzene was removed by distillation and returned to the first vessel. After several hours nearly all the original lactic acid was in the second vessel in the dehydrated state, while the insoluble impurities remained in the first vessel.ALSO:A solution of anhydro-condensation products of lactic acid free from sugars, gums and inorganic salts is obtained from commercial aqueous lactic acid by removing water from it until the dehydrated acid is soluble in an aromatic, hydroaromatic or paraffin hydrocarbon solvent, dissolving it in the solvent as it is formed or after its formation, and separating the resulting solution p from insoluble material. Benzene, toluene, xylene, cyclohexane, white spirit, or petroleum ether may be used as solvent. The water may be removed by distillation under reduced pressure, or in the presence of an entrainer. In the latter case the hydrocarbon solvent may be used as entrainer. Examples are given (see Group III). The purified dehydrated lactic acid may be used for various purposes, either in solution or after being freed from the solvent. Thus it may be used for the preparation of lactic acid esters, or for producing purified lactic acid by hydrolysis. The dehydrated lactic acid may be reacted with formaldehyde, lactose, furfuraldehyde, or monohydric or polyhydric alcohols, to produce resinous products.
    • 9. 发明专利
    • Manufacture of cyclohexyl-cyclohexanol and homologues thereof
    • GB397883A
    • 1933-09-01
    • GB298432
    • 1932-02-01
    • HOWARDS & SONS LTDJOHN WILLIAM BLAGDENGEORGE CHARLES HARRY CLARK
    • Cyclohexyl-cyclohexanol and its homologues are obtained by the hydrogenation of cyclohexylidene-cyclohexanone or its homologues using a catalyst belonging to the group of nonnoble metals, such as iron, nickel or copper, or a mixture of such metals. The catalyst may contain a promoter such as magnesium oxide or chromium oxide, and may be carried on a support. The hydrogenation is preferably carried out under pressure, e.g. 10 atmospheres and at a temperature of 150 DEG C. The cyclohexylidene-cyclohexanone may be prepared from cyclohexanol by condensation with agents such as caustic alkalis, sodium ethylate, barium hydroxide or hydrochloric acid. The condensation product is preferably freed from the condensing agent and purified by distillation. The crude condensation product may be hydrogenated if it is free from acid and combined halogen. Specifications 2306/14, [Class 1 (i), Chemical processes &c.], and 383,472 are referred to.ALSO:Cyclohexyl-cyclohexanol and its homologues are obtained by the hydrogenation of cyclohexylidene-cyclohexanone or its homologues, using a catalyst belonging to the group of non-noble metals, such as iron, nickel or copper, or a mixture of such metals. The catalyst may contain a promoter such as magnesium oxide or chromium oxide and may be carried on a support. The hydrogenation is preferably carried out under pressure, e.g. 10 atmospheres and at a temperature of 150 DEG C. The hydrogenation may be started at a lower temperature and pressure, for example 70 DEG C. and 5 atmospheres, and the temperature and pressure increased when the absorption of hydrogen becomes slow. The cyclohexylidene-cyclohexanone may be prepared from cyclohexanol by condensation with agents such as caustic alkalis, sodium ethylate, barium hydroxide or hydrochloric acid. The condensation product is preferably freed from the condensing agent and purified by distillation. The crude condensation product may be hydrogenated if it is free from acid and combined halogen. Specifications 2306/14, [Class 1 (i), Chemical processes &c.], and 383,472 are referred to.