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    • 5. 发明专利
    • Process of treating phosphate rock
    • GB953598A
    • 1964-03-25
    • GB3840961
    • 1961-10-26
    • JOHN NEWTON CAROTHERSRUDOLPH JOSEPH HURKA
    • C05B3/00C05B11/06
    • Water insoluble citrate soluble calcium phosphate, which is more basic than dicalcium phosphate is produced by heating a mixture of finely divided phosphate rock and finely divided ammonium sulphate to a temperature of 373-500 DEG C., hydrating the intermediate product with ammonia while maintaining the temperature below 80 DEG C. to produce calcium phosphate and ammonium sulphate and separating the ammonium sulphate from the calcium phosphate. Ammonium sulphate solution may be added to the hydrated intermediate product before reacting it with ammonia. In a preferred aspect the hydrated intermediate product may be reheated to a temperature of from 375 DEG to 500 DEG C. and again hydrated at a temperature of 100 DEG to 130 DEG C. before the addition of the ammonium sulphate solution. The hydrated product obtained after the reheating is suspended in the ammonium sulphate solution and the suspension may then be added to another ammonium sulphate solution containing the ammonia. Phosphoric acid may be added to the mixture of hydrated product and ammonium sulphate solution in an amount sufficient to react with substantially all the calcium present in excess of that in combination with P2O3 in the phosphate rock to form calcium phosphate.
    • 6. 发明专利
    • Process of forming phosphate solutions
    • GB835848A
    • 1960-05-25
    • GB982958
    • 1958-03-27
    • JOHN NEWTON CAROTHERSRUDOLPH JOSEPH HURKA JR
    • C05B11/08
    • High-grade Florida phosphate rock is solubilized with aqueous sulphuric acid to form a phosphate solution relatively free of aluminium and fluorine in which 1.9 to 2.1 parts by weight of sulphuric acid are employed for each part by weight of P2O5 in the rock, together with 1700 to 2500 parts by weight of water for each 1000 parts of phosphate rock, and in which there is added to the acid at least 0.6 parts mol. per 1000 parts water of at least one of the following alkali-metal salts: chlorides, sulphates, and orthophosphates of sodium and potassium. The reaction is carried out at not above 80 DEG C. A water-soluble silicate may be added to the solution thus obtained, to precipitate remaining fluorine impurities. Dicalcium phosphate may be recovered from the solution by adding calcium carbonate, lime, or limestone, and the resulting mother liquor employed in a subsequent solubilization. Prior to solubilization, the rock may be wetted with an aqueous solution of the alkali-metal salts. Preferably the acid solution contains 280 to 400 parts of sulphuric acid per 1000 parts water.ALSO:High grade Florida phosphate rock is solubilised with aqueous sulphuric acid to form a phosphate solution relatively free of aluminium and fluorine, in which 1,9 to 2,1 parts by weight of sulphuric acid are employed for each part of P2O5, together with 1700 to 2500 parts of water per 1000 parts of phosphate rock, and in which there is added to the acid at least 0,6 parts mol. per 1000 parts water of at least one of the following alkali metal salts: chlorides, sulphates, and orthophpophates of sodium and potassium. The reaction is carried out below 80 DEG C. A water soluble silicate may be added to the solution thus obtained to precipitate remaining fluorine impurity. Dicalcium phosphate may be recovered from the solution by adding calcium carbonate, lime or limestone, and the resulting mother liquor employed in a subsequent solubilisation. Prior to solubilisation, the rock may be wetted with an aqueous solution of the alkali-metal salt. Preferably the acid solution contains 280-400 parts sulphuric acid per 1000 parts water.
    • 7. 发明专利
    • Improvements in or relating to turntable couplings for articulated road vehicles
    • GB664611A
    • 1952-01-09
    • GB777549
    • 1949-03-02
    • JOHN NEWTON APGAR
    • B62D53/08
    • 664,611. Fifthwheel couplings for vehicles. APGAR, J. N. March 2, 1949 [June 7, 1948; Nov. 18, 1948], Nos. 7775/49 and 7776/49. Class 103(v). A fifth-wheel coupling for a vehicle, of the kind in which coupling may be effected automatically on backing the tractor beneath the trailer so that a king-pin projecting downwardly from a bearer plate fixed to the trailer is guided by a forked part of a lower bearer plate into engagement with a clutching device associated with the forked bearer plate which is carried by the tractor, comprises a turn-- table assembly adapted to be mounted on a tractor chassis and includes an upper turntable plate connected to a lower turntable plate for relative angular movement in relation thereto, the forked lower bearer plate being mounted on the upper turntable plate for rocking movement about a transverse horizontal axis, and means for locking the forked bearer plate against angular movement relative to the upper bearer plate fixed to the trailer so as to maintain the said transverse rocker axis parallel to the trailer axle during operation of the vehicle, the coupling being characterized in that means are provided for impcsitively latching the turntable plates together so as to position the forked bearer plate with the rocker axis thereof trans-- verse with respect to the longitudinal axis of the tractor so as to facilitate engagement of the king-pin with the clutching device. As shown a lower bearer plate 11 is pivotally mounted on a shaft 10 carried by an upper turntable plate 4. Means 15 are provided to lock the lower bearer plate to the upper bearer plate (not shown) carried by the trailer. An arm 26 is pivoted' at 25 to a lower turntable plate 3 and may be engaged at 30 with a bow spring 28. A projection 24 on the arm 26 is arranged to coact with a notch 23 in the lower turntable plate 3 whereby when the turntable is disposed as shown in Fig. 3, the forkedbearer plate is impositively locked with its rocker axis transverse to the tractor. After the tractor has been coupled to the trailer relative movement of the two portions cf the vehicle forces the end 30 of the lever 26 out of engagement with the spring 28 to allow relative rotation of the turntable plates about a pin 37 . According to a further feature of the invention the lateral stability of the vehicle is increased by so arranging the upper turntable plate 4 that it is displaced laterally when it rotates relatively to the lower plate due to the vehicle following a curved path. To this end the pin 37 is squared at 32 for engagement with the plate 4 and carries a spur wheel 33 which meshes with a rack 34 attached to the lower plate 3. Bushes 36 engage the pin 37 and slide within a lateral slot 35 in the plate 3. The relative angular movement of the plates 3, 4 is limited by stops 7, 8 thereon.
    • 10. 发明专利
    • Improvements in or connected with lawn mowers
    • GB200581A
    • 1923-07-12
    • GB1054622
    • 1922-04-12
    • HERBERT JOHN NEWTON CLARE
    • A01D34/43
    • 200,581. Clare, H. J. Newton-. April 12, 1922. Motor attachments with two wheels; couplings for road vehicles.-A motive power unit for pushing lawn-mowers &c. is coupled to the rear of the implement and carries a seat j for the driver in a convenient position for holding the ordinary steering-handles of the implement. The unit comprises a frame carrying an engine e which drives the wheels or rollers d by means of chains passing round sprocket wheels s , t' on the engine and on wheel d, and around wheels s, t coupled on a shaft k by a clutch k which is operated by a lever k , a second lever k being also provided to actuate the lever k . The driving-chains are adjusted by moving the bearings of the shaft k on the member i of the frame, or by adjusting the position of the member i with respect to the top h of the frame by means of a screw i'. A coupling n and spring m are provided in front of the unit, while a coupling r at the rear may receive a roller, &c. The coupling n is secured to the bar o which acts as a foot-rest. One of the Provisional Specifications states that the motor is coupled to the ground wheels by a friction drive.