Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1997-04-03
1998-12-08
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
218 22, H01H 7500
Patent
active
058476296
ABSTRACT:
The helical contact compression springs of a circuit breaker are preassembled in a contact clip for easier assembly of the circuit breaker. The bottom wall of an elongated trough formed by the clip is pierced by holes forming cylindrical protrusions extending into the trough. The clip is placed over the springs supported in a row in a fixture. A die head presses on the spring clip to compress all the springs and then simultaneously insert punches into the holes in the clip to expand the protrusions and secure the springs to the clip. The fixture includes a slide mounted on guides for movement between a loading position and an operating position under the die head. A support block is pivoted on the slide to present one of two sets of spring recesses for circuit breakers having different current ratings with the slide in the loading position.
REFERENCES:
patent: 4635012 (1987-01-01), Kohanawa et al.
patent: 4932877 (1990-06-01), Zinn
patent: 5140742 (1992-08-01), Kaigler et al.
Beck Henry R.
Fischer Kenneth M.
Helms Roger W.
Humert Joseph B.
Little David E.
Donovan Lincoln
Eaton Corporation
Moran Martin J.
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