Electricity: circuit makers and breakers – Interlocking
Patent
1996-02-06
1998-02-10
Nguyen, Matthew V.
Electricity: circuit makers and breakers
Interlocking
H01H 920
Patent
active
057171785
ABSTRACT:
The handle of an electrical switch reciprocally movable in a slot in the switch housing is locked in a desired position by a locking mechanism which includes a base plate secured to the housing adjacent one end of the handle slot. A hasp member is hinged to the base plate at a hinge end for rotation about a hinge axis transverse to the path of reciprocal movement of the handle. The hasp member is rotatable between a locking position in which it overlaps the front end of the slot so that the handle cannot be moved away from the second end of the slot. A staple extending transversely from the base plate protrudes through an opening in the hasp member and has an opening for receiving one or more padlocks for locking the hasp member in the blocking position. In a second embodiment, the hasp member has a second opening through which the handle protrudes for locking the handle at the front end of the slot. Notches in arcuate fingers forming the hinge connection for the hasp member are engaged by sliding the hasp member axially on the hinge connection to latch the hasp member clear of the handle which allows unrestricted movement of the handle even with the switch mounted vertically.
REFERENCES:
patent: 3291924 (1966-12-01), Tharp
patent: 4260861 (1981-04-01), DiMarco
patent: 4631373 (1986-12-01), Ochiai
patent: 4658102 (1987-04-01), Seim et al.
patent: 4920620 (1990-05-01), Yamamoto et al.
patent: 5077991 (1992-01-01), Stickel et al.
Kuzniarski Thomas T.
Puhalla Craig J.
Turner David C.
Eaton Corporation
Moran Martin J.
Nguyen Matthew V.
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