US 4,524,637 A · Spring-operated mechanism

Abstract

A spring-operated mechanism for actuating a switch gear, etc. comprises a cam member secured to a crankshaft and adapted to be moved thereby. Cam grooves are formed in the cam member such that the distance from the center of the crankshaft is smallest at the middle portion of the groove and progressively increases towards the extremities of the groove. A rod is provided with a pin at one end adapted to be rolled at each end within the cam grooves, and at the other end the rod is provided with a spring support. A stationary member is provided with guide elements to cause the rod to move linearly, and a spring is disposed between the stationary member and the spring support, whereby the spring is adapted to store compressive energy when the crankshaft is rotated through a predetermined angle by a driving source, and, through a further revolution of the crankshaft, the spring releases the stored energy to accelerate the revolution of the crankshaft.

Claims4

Dependent claims

A spring-operated mechanism comprising:

a cam means secured to a crankshaft and adapted to be moved thereby,
cam grooves formed in said cam means having such a shape that the distance from a center of said crankshaft is smallest at a middle portion of said cam grooves and progressively increases towards extremities of said cam grooves,
a connecting rod provided with a guide roller at one end rolling within said cam grooves,
a spring rod provided at the other end of the connecting rod,
a bottom spring support connected to the spring rod at an end opposite from the connecting rod,
a stationary member provided with groove means at the other end of the connecting rod for guiding rectilinear movement of said connecting rod, and
a spring support means disposed between said stationary member and said bottom spring support,
whereby said spring means is adapted to accumulate energy when said crankshaft is rotated through a predetermined angle by a driving source, and, upon further revolution of said crankshaft, said spring means releases said energy to urge said crankshaft to rotate quickly.

5 more elements

Dependencies are inferred from the claim text.

Spring-operated mechanism

Life of this patent

Spring-operated mechanism

Life of this patent

Abstract

Claims4