Constant-torque spring
![George Emmott]()
These are Constant Force Springs manufactured by George Emmott (Pawsons) which features its ability to extend through a working range of any position having the same force. These tools are composed of different tightly wound coil of spring steel or stainless steel having an inner end which is compatible to a shaft and its outer end that is extended.
Its natural curvature across the material width creates a stable retraction force. This is the ideal tool for motor arrangement wherein the spring is essential to the operation in a smaller drum. Using this tool, it is possible to create a constant torque motor or rewind system that suits to counterbalancing operation.
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