Patent ID: 9682329
Date: 2017-06-20
CPC Classifications: A63H

Claim:
1. A toy airplane comprising a sheet paper fuselage and wings extending horizontally from respective opposite longitudinal free edges of a vertical crease forming the fuselage and an electric power conversion unit operably mounted thereon, the electric power conversion unit comprising: a one-piece, plastic nose-piece comprising a combination rechargable electric power supply unit mounting portion and nose clip; a rechargeable electric power supply unit mounted in the rechargeable electric power supply unit mounting portion; a rear propulsion unit including an electric motor mount and motor driving a pusher propellor and, an electrical lead connecting the rechargable electric power supply unit to the electric motor and contained in a conduit extending rearwardly above the vertical crease to a tail; wherein: the conduit is of square cross-section and keys into a complementary socket of the motor mount maintaining the rear propulsion unit tilted upward at a predetermined angle relative to the nose-piece as required for flight stability; the nose-clip comprises a pair of cantilever leaf spring arms extending rearwardly in spaced-apart, coplanar, side-by-side relation under the rechargeable electric power supply unit mounting portion and having portions which converge horizontally towards each other adjacent rear free ends and, a paper spreading fin depends from a rear end of the nose-piece vertically aligned with and below the conduit and adjacent but spaced apart rearward of free ends of the pair of cantilever leaf spring arms, the paper spreading fin extends from the nose piece more downwardly than rearwardly and is stuffed into the vertical paper crease, maintaining paper walls of the vertical paper crease spread apart, forming the fuselage between the pair of cantilever leaf spring arms so that portions of the pair of the cantilever leaf spring arms which converge horizontally towards each other are in horizontal, inward clamping engagement with the vertical walls of the vertical crease, which are urged horizontally apart by the spreading action of the paper spreading fin and, with leading edge portions of the horizontal paper wings on each side of the vertical paper crease clamped vertically between respective cantilever leaf spring arms of the pair of the cantilever leaf spring arms and the rechargeable electric power supply unit mounting portion.