US2131222A - Aeroplane mounting - Google Patents

Description

Sept. 27, 1938. E. LI DALE 2,131,222

AEROPLANE MOUNTING Filed May 10, 1957 INV/VT0R. 1.00 L. Dal/E.

KT'TOR/VEX Patented Sept. 27, 1938 UNITED STATES A 2,131,222 AEROPLANE MOUNTING Eldon L. Dale, Long Beach, Calif., assignor, by

direct and mesne assignments, to Dale Radioplane 00., a corporation of California Application May 10, 1937, Serial No. 141,664

3 Claims.

This invention relates to an aeroplanemounting, particularly for toy aeroplanes and the prime object of my invention is to provide a mounting for an aeroplane which is revolvable about a central tower and which permits the plane to loop while revolving about the central pivot, the looping of the plane being accomplished by the pull of the propeller and the lift of the wings and without other controls or power applied to the mounting arm.

Still another object is to provide an aeroplane mounting of the character stated, which is simple in construction, is efiective and realistic in use and further, which is relatively inexpensive to manufacture.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed the appended claims.

In the drawing:

Figure 1 is a side elevation of the aeroplane mounting with parts broken away to show interior construction.

Figure 2 is a top plan view of the same.

Figure 3 is a side elevation of the aeroplane mounting showing the driving motor and mounting arm also in side elevation.

Figure 4 is a fragmentary planview of the pivotal mounting for the am. V

Figure 5 is a fragmentary plan 'view of the inner end of the mounting arm.-

Referring ,more particularly to the drawing, the numeral l indicates the central tower about which the toy aeroplane 2 revolves. The toy aeroplane includes the usual wings 3, and a driving propeller 4. The method of driving said propeller will be further described. A trunnion 5 is journaled in the top of thetower I and a ring 6 is integrally formed with the trunnion 5 and is positioned on the top thereof. A ball I is pivotally mounted in the ring 6 on the pintles 88. The ball I is thus permitted to pivot in a vertical plane. An electric motor 9 is attached to one side of the ball i by suitable means usual and well known in the art. A sleeve i0 is attached to the ball 1 and projects substantially horizontally therefrom on the side opposite to which the motor 9 is attached. The motor 9 receives its power through wires ll shown diagrammatically in Figure 1. Sliding contacts I 2 on the trunnion 5 convey the current to the motor 9 and also permit horizontal and vertical movement of the parts as will be further described. The speed of the motor is controlled from the rheostat l3, the rheostat being placed description and.

at a distance from the tower I. An arm I is journaled in the sleeve ill at its inner end and the outer end of the same is curved in a horizontal plane as shown at l5, so as to enter the fuselage of the plane 2 as shown in Figure 2. The outer end of the arm is also bent downwardly in a vertical plane as shown at IS. The curves l5-I6 permit the plane to loop as itrevolves about the trunnion 5 as will be evident from analyzing the forces exerted by the propeller 4. and the lift of the wings 3. It is noted that there is a lever arm extending from the center line of the arm l4 indicated at C in Figure 1 and extending to the line A B in Figure 1. The propeller 4 exerts a force in the line A B and the lift of the wings 3 exerts a force at right angles to this line A B. This last named force extends upwardly. The component of these two forces then, is a line extending upwardly at an angle to the line A B and consequently the plane will revolve around the point C, when the speed of the propeller 4, i. e. the forward speed of the plane is sufliciently high. The lifting force of the wings and the forward force of the propeller 4 are all exerted in a plane displaced horizontally from the point- C. This is evident from viewing Figure 2. The curve I5 accomplishes this purpose and again there is a lever arm, the length of which is from the center line of the arm It to the plane of lift of the wings 3. Ifhis ivill also tend to cause the plane to loop or revolve around the center 'line of the arm M. The propeller 4 is driven from the motor 9 by a flexible wire H which extends through the arm l4 and is attached to the armature of the motor. When'the propeller 4 is not revolving, the aeroplane would tend to hang close to the floor, with the propeller\ l pointing downwardly. To prevent this, I piovide a. i

stop for the arm It, so that when idle the aeroplane will assume an inclined position substantially as shown in Figure 1. This stop consists of a'finger l8, which is attached to the ring 6. A notch i9 is provided in the side of the arm l4, which notch is engaged by the finger l8 when the aeroplane is not in flight. As soon as the propeller i is driven, the aeroplane will lift the arm l4 upwardly, thus disengaging the finger l8 and permitting the arm M to revolve when the aeroplane is looping. It will be evident from the foregoing description, that the electric motor 9 counterbalances the aeroplane 2 and further, that the center of the motor is directly in line with the arm I4, thus permitting the driving cable or wire I! topass directly from the armature of the motor into the arm 14 and thence to the propeller 4. By regulating the speed of the motor from ing mounted for vertical movement, a driving motor on one side of the trunnion, an aeroplane mounted on the outer end of the arm, apropeller on the aeroplane and, a flexible cable extending from the motor through the arm and thence to the propeller, whereby the propeller is driven by the motor and a remote rheostat controlling the speed of said motor, said arm being curved in a horizontal plane as it enters the aeroplane and said aim being curved downwardly and in a vertical plane at the outer end thereof.

2. An aeroplane mounting comprising a central tower, a trunnion pivotally mounted in the tower, an arm journaled on the trunnion, said arm being mounted for vertical movement, a driving motor on one side of the trunnion, an aeroplane mounted on the outer end of the arm, a propeller on the aeroplane and a flexible cable extending from the motor through the arm and thence to the propellerpwherebythe propeller is driven by the motor and a remote rheostat controlling the speed of said motor, said arm being curved in'a horizontal plane as it enters the aeroplane and said arm being curved downwardly and in a vertical plane atf the outer end thereof, and disengageable means engaging the arm when the aeroplane is at rest, whereby said arm is prevented from rotating.

3. An aeroplane mounting comprising a cen tral' tower, a trunnion pivotally mounted in the tower, an arm journaled on the trunnion, said arm being mounted for vertical movement, a driving motor on one-side of the trunnion, an aeroplane mounted on' the outer end of the arm, a propelleron theaeroplane and a flexible cable extending from the motor through the arm and 'thence'to the propeller, whereby the propeller is driven by the motor and a remote rheostat controlling the speed of said motor, 'said arm being curved in a horizontal plane as it enters the aeroplane and said arm being curved downwardly and in a vertical plane at the outer end thereof,

a fixed finger adjacent the arm and means on the arm engageable by the finger when the aeroplane is at rest, whereby said arm isprevented from rotating,v

ELDON IL. DALE.

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