Rocket motors

专利名称：Rocket motors

发明人：PORCHER FREDERICK JAMES申请号：US79222459申请日：19590211公开号：US2972859A公开日：19610228

摘要：844,245. Rocket motors. IMPERIAL CHEMICAL INDUSTRIES Ltd. Feb. 13, 1957[Feb. 24, 1956], No. 5923/56. Classes 9(1) and 9(2). A rocket motor comprises a casing, afirst solid propellent charge secured therein in gastight manner to prevent continuousflow of gas between the casing and the outer surface of the charge, a second chargespaced from the first on the side remote from the outlet in the casing for propellent gas,each charge being adapted to be ignited so as to generate propellent gas in the spacebetween them, a transfer tube for directing propellent gas to said outlet and positionedin a bore in the first charge to receive gas generated in the space between the charges, aclearance being provided between the tube and bore to permit equalisation of pressureon both sides of the first charge, each charge having ignition preventing means on part ofits surface whereby as the charges burn the displacement of the centre of gravity of thesystem defined by the two charges does not exceed an allowable maximum and ignitingmeans for igniting said charges. In the arrangement shown in the figure the propellentcharges 5, 6 are arranged inside a cylindrical casing 1 with their ignition surfaces facingeach other and are coated with ignition inhibiting material on their other surfaces. Thecharge 6 is secured to the casing bymeans of a charge locating ring 11 provided with aflange 13 engaging a groove in the charge and screwed to an end plate 3 of the casing. A

gas-transfer tube 17 is secured in a gas tight manner to the wall of an aperture in the endplate 3 and extends through a bore in the charge 6 and is provided at its inner end withan ignition device 18. The transfer tube communicates with the nozzle of the motor (notshown) and may be formed integrally with it. The Provisional Specification describesanother embodiment wherein a single propellent charge is employed and is arranged toburn simultaneously from opposite ends towards the middle. The charge is supportedwithin its casing by means located around its middle, the support also constituting orincorporating obturation means. Gas from the forward end of the charge passes througha transfer tube towards the rear end of the casing which is provided with a commonoutlet for the gases from both ends of the charge to the motor nozzle.

申请人：IMPERIAL CHEMICAL INDUSTRIES LIMITED

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