TODAY’S PATENT – BALANCE WHEEL
This invention “Balance wheel” was invented by Wilhelm Tilse and assigned to Timex Group USA Inc, was granted patent on 4th May, 1976 by the USPTO bearing patent grant number USRE28794E to the patentee. The present invention pertains to a balance wheel carrying a body mounted thereon. The body is mounted asymmetrically with respect to the balance wheel’s axis of rotation, which means that the centre of the body is displaced a predetermined distance from a reference plane via the balance wheel axis. Variations in body weight or wheel design cause rotation about the balance wheel’s axis.
The balance wheel comprises a substantially annular rim portion having a gap within which part of coil is mounted to the tapered faces and of the rim by means of a suitable adhesive compound. The coil’s opposite side is nested between the yoke’s arms and held in place with adhesive. The yoke is one end of a spoke that extends inward from the balance wheel’s rim. The rim also includes a slightly enlarged portion that extends on both sides of the spoke and an enlarged counterweight portion with a predetermined inner curved surface. The balance wheel is designed so that an unbalanced axially supported wheel will rotate a predetermined amount with respect to a fixed tool, such as a punch or drill, depending upon variations in coil weight and wheel design. The tool is presented with a section of the counterweight when the balance wheel moves.