Disengageable charging mechanism for spring powered electrical switching apparatus

HA Wehrli III, PL Ulerich, W Brocklebank - US Patent 5,938,008, 1999 - Google Patents
The large close Spring in the operating mechanism of electrical Switching apparatus is
charged by a charging mechanism which includes a charging cam mounted on a cam Shaft …
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Disengageable charging mechanism for spring powered electrical switching apparatus

HA Wehrli III, PL Ulerich… - US Patent …, 1999 - freepatentsonline.com
The large close spring in the operating mechanism of electrical switching apparatus is
charged by a charging mechanism which includes a charging cam mounted on a cam shaft …