Tuneable rotating unbalanced mass device

Details Tuneable rotating unbalanced mass device Tuneable rotating unbalanced mass device

1994-05-20

1995-08-22

Graham, Matthew C.

Spring devices

Vehicle

Torsion

244158R, 267154, 267160, B64G 166, F16F 114

Patent

active

054432472

ABSTRACT:
In a torsion spring the spring action is a result of the relationships between the torque applied in twisting the spring, the angle through which the torsion spring twists, and the modulus of elasticity of the spring material in shear. Torsion springs employed industrially have been strips, rods, or bars, generally termed shafts, capable of being flexed by twisting about their axes. They rely on the variations in shearing forces to furnish an internal restoring torque. In the torsion springs herein the restoring torque is external, and therefore independent of the shearing modulus of elasticity the torsion spring shaft. Also provided herein is a variable stiffness torsion spring. This torsion spring can be so adjusted as to have a given spring constant. Such variable stiffness torsion springs are extremely useful in gimballed payloads such as sensors, telescopes and electronic devices on such platforms as a space shuttle, a space station.

REFERENCES:
patent: 2238380 (1941-04-01), Almen
patent: 2950103 (1960-08-01), Ruf
patent: 3207497 (1965-09-01), Schoonover
patent: 5129600 (1992-07-01), Polites

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