Backwound pre-stressed spring motor and method

Motors: spring – weight – or animal powered – Spring – Spring mounting

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Details

242 783, 267 59, 267156, F03G 100

Patent

active

046357556

ABSTRACT:
A backwound pre-stressed flat spring motor and method of making the same having a pre-stressed spring element backwound on a central arbor within a cup wherein a portion of the spring element extends beyond the arbor wherein the initial turns of spring element backwound on the central arbor comprise alternating layers of the extended portion of the spring and the spring element resulting in increased initial torque when compared to a conventional backwound pre-stressed spring motor having the same construction otherwise.

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