12,819. Lohmann, H. May 26. Aerial machines without aerostats; planes, arrangement of; steering and balancing.-The supporting - planes of an aerial machine are divided at the middle and pivoted on a frame carrying the front elevator, rear rudder, and g r o u n d wheels. The planes on the two sides of the machine can be adjusted independently by hand, or they can be turned automatically in opposite directions for balancing. The handlevers controlling the planes on the two sides of the machine also serve to actuate the rudder and the elevator. The invention is shown applied to a biplane machine in which the upper and lower planes are connected by hinged struts 6 provided with toothed sectors 10, 11, which engage with pinions secured to shafts 16, 17 extending laterally. The shafts 16, 17 are carried on frames 22 secured to the frame 5 of the machine. A sprocket-wheel 30 connected by a chain to wheels on the inner ends of the shafts 16, 17 is mounted on a shaft 70 carrying a pulley 25. A similar sprocket-wheel 30 and pulley 26 are mounted on the shaft 71 for operating the planes 3, 4 on the opposite side of the machine. Separate operating - devices 33, 34 are provided for the planes at the two sides of the machine, each device comprising a hand - lever 42, Fig. 4, movable in two directions. The cord 35, passing around the pulley 25 or 26, is guided by pulleys 39, 40 around a pulley 38 mounted on an upright 37. The lever 42 is secured to the pivot of the pulley 38, and passes between a double locking-rack 43. The uprights 37 of the operating-devices 33, 34 are mounted to rotate in bearings, so that, by moving the hand-lever 42 horizontally, the pulley 45 is turned to actuate either the rudder or the elevator. The lever is locked against horizontal movement by a spring tooth 54, which engages with a rack 52 pivoted to the frame of the machine. The automatic mechanism for adjusting the lateral planes in opposite directions for balancing comprising a pendulum 60, Fig. 1, pivoted at 61 and controlling a relay mechanism. A shaft 64 is driven from the motor shaft and carries two bevel pinions 76, 77, one of which is adapted, when the shaft 64 is lowered or raised by an arm 63 attached to the pendulum, to gear with pinions 72, 73 on the shafts 70, 71. The shafts 70, 71 are connected by the sprocket-wheels 30 and chains with the shafts 16, 17 which adjust the inclination of the planes. A similar automatic device is used for actuating the front elevator, and comprises a rotating shaft 83 carrying pinions adapted to engage with a pinion 87 when the shaft is raised or lowered by the action of the pendulum 78. The pinion 87 is secured to a pulley 89 connected to the elevator.