Device for creating an angular biasing force

A device for creating an angular biasing force between a fixed structure and an elongated member mounted with respect to said structure for rotation about an axis generally perpendicular to said structure, said device comprising:

• a plurality of parallel connected torsion spring, each formed from convolutions of flat spring metal coiled concentrically around said axis, each of said torsion springs having a first end fixed to said structure and a second end connected to said member.

A device as defined in claim, 24 wherein said radial cavity includes a radial slot.

A device for creating an angular biasing force between a fixed structure and an elongated member mounted with respect to said fixed structure for rotation about an axis generally perpendicular to said structure, said device comprising:

• a plurality of torsion springs concentric with said axis and connected in series from a first torsion spring to a last torsion spring, each of said torsion springs formed of flat spring metal coiled concentrically around said axis with a first inner convolution end and a second outer convolution end, a mounting cup for each of said torsion springs, each of said cups having a spring cavity defined by a cylindrical wall concentric with said axis and a slotted shaft extending from said cavity and concentric with said axis, said cylindrical wall having a contoured opening to capture said second end of one of said torsion springs, said slotted shaft adapted to capture the first end of a next series spring, with said member only connected to said first end of said last torsion spring and said mounting cup of said first spring connected to said fixed structure.

A subassembly for a series torsion spring motor, said subassembly comprising a mounting cup having a spring cavity defined by a cylindrical wall and a slotted shaft extending from said cavity and concentric with said wall, a torsion spring formed of flat spring metal with an axis concentric to said shaft, a second outer convolution end connected to said wall and a first inner convolution end adapted to be connected to a slotted shaft of a mounting cup of an adjacent, concentric subassembly.

A device for creating an angular biasing force for a member, which member is mounted to a fixed structure, said device comprising an element attached to said fixed structure and a plurality of force units each including a torsion spring exerting a biasing force between said structure and said member, wherein said torsion springs each have a first inner end associated with said fixed structure and a second outer end associated with said member so the torsion biasing force of each spring is in a direction from said fixed structure to said member.