Abstract A device for automatically lowering and landing an electric model plane of the free flight type comprising an electromagnet securely mounted on a plane body and energized by a battery for supplying a motor for a propeller with an electric power; and a system connecting said electromagnet to horizontal planes hingedly mounted on the plane body and which includes a magnetic member rotatably held by said electromagnet and a tensile means fixed to the plane body. Said magnetic member is adapted to be attracted by said electromagnet against an action of the tensile means while the magnet is sufficiently energized by the battery thereby to maintain said horizontal tail planes in a horizontal flight position and said tensile means acts on the tail planes to shift the same into a slantingly raised position when the attracting force of said electromagnet is overcome by the action of said tensile means by exhaustion of the power thereby lowering and landing the plane automatically.
Inventors
👤 K Mabuchi
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 02:17
CPC Classifications
A; A63; A63H; A63H27/00; A63H27/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
136 words
A device for automatically lowering and landing an electric model plane including horizontal tail planes hingedly mounted on a plane body at a tail portion thereof, an electric motor for rotating a propeller and a battery acting as a power source for said electric motor; which comprises an electromagnet securely mounted on the plane body and energized by said battery; and a system for connecting said electromagnet to the horizontal tail planes which includes a magnetic member attracted By the electromagnet to maintain said horizontal tail planes in a horizontal flight position while the electromagnet is sufficiently energized by the battery, and a tensile means action on the tail planes for shifting the same into a slantingly raised position when the battery is almost exhausted thereby to lower the plane before complete exhaustion of the power.
Claim 2
Independent Claim
136 words
A device for automatically lowering and landing an electric model plane including horizontal tail planes hingedly mounted on a plane body at a tail portion thereof, an electric motor for rotating a propeller and a battery acting as a power source for said electric motor; which comprises an electromagnet securely mounted on the plane body and energized by said battery; and a system for connecting said electromagnet to the horizontal tail planes which includes a magnetic member attracted By the electromagnet to maintain said horizontal tail planes in a horizontal flight position while the electromagnet is sufficiently energized by the battery, and a tensile means action on the tail planes for shifting the same into a slantingly raised position when the battery is almost exhausted thereby to lower the plane before complete exhaustion of the power.
Claim 3
Dependent Claim
139 words
A device for automatically lowering and landing an electric model plane as claimed in claim 1, wherein said system comprises a rotary member pivotally mounted on a shaft and securely fitted to said magnetic member; a rod member connected at one end to the lower portion of said rotary member and at the other end to said horizontal tail planes, said magnetic member being attracted by said electromagnet to pull said rod member forward thereby maintaining the horizontal tail planes in the horizontal flight position while the electromagnet is sufficiently energized by said battery; and a tension spring having one end thereof connected to said rod member and the other end secured to said plane body and pulling backward the rod member to shift the horizontal tail plane into a slantingly raised position when the battery is almost exhausted.
Claim 4
Dependent Claim
34 words
A device as defined in claim 2, wherein said rod member is connected to the horizontal tail plane by way of a horn member secured to the lower face of said horizontal tail plane.
Claim 5
Dependent Claim
25 words
A device as defined in claim 2, wherein said shaft is supported on a pair of arm members extended on both sides of said electromagnet.