H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/280
H01H 9/20 (2006.01) H01H 9/04 (2006.01) H01H 9/22 (2006.01)
Patent
CA 1059193
ABSTRACT OF THE DISCLOSURE An explosion-proof electrical enclosure has a body with two threaded caps closing access openings on opposite ends of the body. Within the body is an electrical switch operable by a handle positioned outside the body. The caps are held against rotation by bolts which extend through the body and are resiliently urged into recesses in the caps. These bolts are accessible from outside the body so that they can be moved out of the recesses thereby allowing the caps to be rotated and unthreaded. A safety interlock mechanism includes a spacer positioned, when the handle is in the switch-closed position, between the inner ends of the bolts to prevent unlocking move- ment of the bolts and interconnected to the handle so as to be moved out of that blocking position when the handle is in the switch-open position. A threaded pin extends through the body and engages the mounting for the spacer so that by rotating the pin it moves axially thereof in the body. As it does so it engages the mounting for the spacer to move the spacer sidewise out of its blocking position between the inner ends of the bolts.
263365
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