US1767769A

US1767769A - Toy aeroplane

Info

Publication number: US1767769A
Application number: US253341A
Authority: US
Inventors: Mee Frederick John
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-01-28
Filing date: 1928-02-10
Publication date: 1930-06-24
Anticipated expiration: 1947-06-24

Description

June 24, 1930. F. J. MEE

TOY AEROPLANE Filed e 1928 2 Sheets-Sheet 1 June 24, 1930.. F. .9. MEE

' TOY AEROPLANE Filed Feb. 10, 19 28 2 siieetsfl-sheat 2 placed to its normal Patented June 24, 1930 UNITED STATES PATNT; or'

FREDERICK JOHN MEE,

TOY AEROPLANE OF LONDON, ENGLAND Application filed February 10, 1928, Serial No. 253,341, and in Great Britain January 28, 1828.

This invention relates to toy or model aeroplanes and more particularly to those of which a tractor propeller is driven by a motor comprising a number of strands of elastic which are adapted to be twisted. If a toy or model aircraft of this type, at the end of a flight, nose dives instead of alighting in a more or less horizontal position there is a risk that the propeller itself may be the first to come into contact with the ground and it and/or its mounting, may be severely strained if not damaged seriously. The object of the invention is to provide an improved construction which shall minimize or eliminate entirely all risk of such damage to the propeller.

In accordance with the invention the propeller of a toy or model aeroplane is angularly displaceable, against spring action, in a direction transverse of its normal axis of rotation.

In the case of a toy or'model aeroplane having the usual stranded elastic motor, the restoration of the propeller from a disposition is preferably effected by the pull of the stranded elastic motor itself.

In any case the shaft of the propeller may be adapted to be displaced angularly as one with the propeller. For example said shaft may be mounted in a hearing which itself is singularly displaceable about any axis transverse of the normal axis of rotation of the propeller. If the propeller shaft be mounted in a bearing as just mentioned, a landing chassis may be angularly displaceable as one therewith about the same axis.

If desired, the propeller may be adapted to be displaced angularly about a normally horizontal axis only.

' By way of example the accompanying drawings show two forms of the invention in which the propeller isdisplaceable about a horizontal axis the fore part only of the toy aeroplane being shown in side elevation in each case, the form shown in Figure 1 having a fixed landing chassis, whilst that shown in Figure 2 is provided with a landing chassis which is angularly displaceable as one with the propeller and its mounting.

In the case of the construction shown in igure 1 a propeller a is fast upon a short shaft I) mounted in bearings c, a and adapted to be rotated by the elastic strands d in the well known manner. The bearings c, c are pressed out from a metal plate 6 of which side pieces f extend downwardly one on each side of the longeron member y, constituting what in a real aeroplane would be the fuselage,- whilst a bolt h passing through the side pieces f and said longron 9 serves as a pivot about which the propeller a and its shaft are angularly displaceable against the pull of the elastic strands (Z, the plate e serving to limit the movement of the mounting in one direction so that the shaft Z) is in correct alignment. In this construction a landing chassis j is attached rigidly as at I76" 71; to the longron g and is not, there ore, angularly displaceable with the propeller a and its mounting.

In the construction illustrated in Figure 2 of the drawings a propeller a is fast upon a shaft Z2 mounted in bearings c a and is adapted to be rotated by. the elastic strands (Z as before. In this case, however, the metal plate 6 is shaped differently and a wire m serving asthe framework of a landing chassis j is attached to the rear of the side pieces 7 of said plate 6 an extends across the top of the longron g intermediately of the length of said side pieces so as to serve also as a stop to prevent undue displacement about a bolt it (as in the previous case) of the propeller a and its mounting in the direction of the pull of the elastic strands d. It will be observed that in this construction the landing chassis j is displaceable as one with the-propeller a and its mounting about the bolt it. y

In both constructions illustrated the propeller 00 either alone or together with the landing chassis j, as the case may be, will, upon a part thereof below its axis of rotation encountering an obstacle when the model is moving inv a forward direction be displaced about the bolt to a position such as those indicated by broken lines in the drawings, thus reducing or obviating the risk of damage.

in opposition to tional to the elastic strands (Z In cases where the motor is other than elastic strands (Z, a coiled or other spring or springs may be adapted to pull the propeller shaft Z2 into its normal position, and if de sired such a spring or springs may be addi to provide for the contingency of a nose-dive after said strands have become unwound or otherwise slack.

I claim V 1. In a toy aeroplane, a body, a shaft, a propeller mounted upon sail shaft and rotatable about an axis adapted normally to extend in the direction of flight, a bearing support on said body for said shaft, means mounting said bearing support for angular displacement of the propeller transversely of the axis thereof, and spring means normally maintaining said shaft with the propeller axis substantially parallel with the direction of flight, said mounting of the bearing support of the shaft being adapted for the angular displacement of the propeller by the application pressure toward the rear on one of the propeller blades when it is below said shaft.

2. In a toy aeroplane, thereon rotatable about an axis, adapted normally to extend longitudinally of said body in the direction of flight, a hinged bearing support for the propeller adapting it for angular displacement about a pivot transverse to the direction of flight and an elastic motor adapted to impart rotary motion to said propeller and normally to maintain it with its axis substantially parallel with the direction of flight.

3. In a toy aeroplane, a body, a rotary shaft, a bearing support for said shaft hinged to said bodyon a transverse pivot, a propeller on said shaft, andspring means adapted normally to maintain said shaft substantially parallel with th direction of flight, said hinged bearing support being adapted for angular displacement of said shaft and propeller transversely of their axis.

4. In a toy aeroplane, a body, a shaft, a bearing support for said shaft hinged to the body on a transverse pivot, a propeller fast on said shaft, an elastic motor'adapted to impart rotary motion to said shaft and normally to maintain it substantially parallel with the direction of flight, the transverse pivot for said bearing support being adapted to permit movement of the bearing to effect angular displacement of said shaft the elastic motor transversely of said axis. V 5. In a toy aeroplane, a body, a shaft, a propeller faston said shaft, a bearing support for said shaft, a transverse pivot mounting said bearing support for movement of the shaft and propeller in an axial plane of the shaft normal to a body, a propeller an axial on the body said pivot, a landing chassis movable with said bearing support, and spring means adapted normally to maintam said bearing support and landing chassis in position for flight with the axis of the propeller sub stantially parallel with the direction of flight. I

6. In a toy aeroplane, a body, a shaft, a propeller fast on said shaft, a bearing support for said shaft, a transverse pivot mounting said bearing support on the body for movement of the shaft and propeller in an axial plane of the shaft normal to said pivot, and an elastic motor adapted to im part rotary motion to said shaft and normally to maintain said bearing support with the axis of the propeller substantially parallel with the direction of flight.

7 In a toy aeroplane, a body, a shaft, a propeller fast on said shaft, a bearing support for said shaft, a transverse pivot mounting said bearing support on the body for movement of the shaft and propeller in plane of the shaft normal to said pivot, a landingchassis mounted upon and movable with said bearing support, and an elastic motor adapted to impart rotary IllO- tion tosaid shaft and said bearing support and landing chassis in such position that the axis ofthe propeller is substantially parallel with the direction of flight.

8. In a toy aeroplane, a body, ashaft, a propeller fast on said shaft, a bearing support for said shaft, a landing chassis, means securing said bearing support and the landing chassis to said body for pivotal move-- men-t thereof about a horizontal axis normal to said shaft, and spring means adapted normally to maintain said bearing support and landing chassis in such position that the axis of the propeller is substantially parallel with the direction offlight.

9. In a toy aeroplane, a body, a shaft,a propeller fast on said shaft, a bearing support for said shaft, a landing chassis, means normally to maintain