| 摘要 |
441,103. Controlling slot-forming slats for aircraft. BLACKBURN AEROPLANE & MOTOR CO., Ltd., Seaplane Base, and BUMPUS, F. A., Elloughton, both in Brough, near Hull. Dec. 27, 1934, No. 37059. [Class 4] An aircraft having slats which operate automatically during flight is provided with a locking device which permits the slats to be locked in the closed position .and which is adapted to be operated to lock the slats in the closed position only when the aircraft is on the ground. Mechanism is provided for automatically unlocking the device by operations performed prior to, or in the take-off, or during flight, if it has not been unlocked by hand. The slat a is pivotally mounted by links a<1>, a2 near the nose of the wing and a tubular member c connected to the link a<2> and extending in the direction of the wing span is engaged in the locked position of the slat by a recess in a bell-crank lever b pivoted at b on the spar of the wing. The arm b<2> of the bell-crank is connected to a spring-loaded device d connected at d<1> to the frame of the wing. Movement of the end b<3> in the counter-clockwise direction to unlock the slat, compresses the spring until a dead centre position has been reached after which the spring device expands to move the bell-crank and retain it in an unlocking position against a stop f. The slats may be unlocked by the operation of the lever controlling the ailerons. A cable e passing round a pulley e<2> is splayed into portions e<4>, e<5> connected to a yoke e<3> rigid with a rotatable shaft e<8> which carries a yoke e<10> having its ends connected by cables e<11>, e<12> to the lever, (not shown), controlling the ailerons. The locking device may be released by movement of the tail wheel or skid under spring action as the tail of the aircraft rises prior to flight.
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