Small frames for rotary or moving coils of electrical measuring instruments

Claim 1

A small frame means for the moving coil of electrical measuring instruments, comprising a substantially rectangularshaped coil winding body member formed of metal, a respective support member for bearing needle means provided at the central region of two oppositely situated sides of said coil winding body member, bearing needle means forming an axis of rotation cooperating with said support members, said coil winding body member including a winding surface for the coil windings, said coil winding body member and said support members cooperating with one another to enclose the coil windings at said winding surface, said coil winding body member being provided at its marginal regions externally of said winding surface with means defining a zone cooperating with said support members, one of said members being substantially U-shaped and the other of said members being substantially flat at the region of the coil windings, and means for providing a connection between said coil winding body member and each of said support members for enclosing said coil windings, both said support members being substantially centered at said coil winding body member, said coil winding body member includes laterally raised boundary walls for the coil windings, said raised boundary walls being in the form of substantially circular segment-shaped support surfaces having substantially cylindrical guide walls, to thereby define socket means for said support members, said socket means being arranged substantially coaxially with respect to said axis of rotation, each of said support members incorporating a respective flat substantially circular-shaped plate member seated in said associated socket means, each said flat substantially circularshaped plate member of each associated support member being constructed to be resilient in the direction of the axis of rotation.