Spring device

A spring assembly comprising:

• a spring including a plurality of coils wound helically between first and second ends of the spring, the first end terminating at a first end coil and including a second end coil adjacent the first end coil;
• a first spring disc comprising a helical or spiral surface secured between the first end coil and the second end coil, and a hole extending through the surface;
• and
• a first elongate member coupled to the first spring disc via the hole for coupling the spring assembly to a machine element.

A system for supporting an arm of a user, comprising:

• a harness configured to be worn on a body of a user;
• an arm support coupled to the harness configured to support an arm of the user, the arm support comprising an arm bracket including an arm rest on a first end thereof, and a second end pivotally coupled to the harness such that the arm bracket is pivotable about multiple axes to accommodate movement of the user's arm while following the movement without substantially interfering with the movement of the user's arm;
• and
• one or more compensation elements mounted on the arm bracket to at least partially offset a gravitational force acting on the user's arm as the user moves and the arm bracket follows the movement of the user's arm,
• wherein the one or more compensation elements comprise a spring assembly comprising:
• a spring including a plurality of coils wound helically between first and second ends of the spring;
• and
• a spring disc attached to the first end of the spring between a first end coil terminating the first end and a second end coil adjacent the first end coil.