Electricity: circuit makers and breakers – Electric switch details – Cases and bases
Patent
1995-04-28
1997-06-10
Walczak, David J.
Electricity: circuit makers and breakers
Electric switch details
Cases and bases
200295, 310 68A, H01H 164
Patent
active
056367317
ABSTRACT:
A switch assembly (10) for installation on a dynamoelectric machine (M). An electrical overload switch (12) is interconnected with the dynamoelectric machine and electrical conduits (C) are routed thereto for resetting the dynamoelectric machine after it is shut down due to an overload condition. A conduit box (14) has opposed sidewalls (16, 18) and endwalls (20, 22), and an open top and bottom. A bracket (30) on which the switch is mounted is sized to fit in the box for a switch element (32) of the switch to be positioned adjacent an opening (34) in one wall of the box. Dimples (44a, 44b) are formed in the wall against which the bracket is installed. The dimples extend inwardly into the interior of the box and act as stops for the bracket for properly positioning the bracket and switch within the box. A plurality of knockouts (K1-K6) are formed in the sidewalls for providing an opening through which electrical conduits are routed to the switch when a knockout is removed. Mounting flanges (24, 26) are formed on opposite sides of the box for mounting the box to a cover (60) of the dynamoelectric machine. The cover has a top (62) sized to fit over the interior of the box. The top has a peripheral depending sidewall (64) covering an upper portion of respective sidewalls and endwalls of the box. Dimples (66a-66c) are formed in a section of the cover sidewall and extend inwardly. The box has corresponding dimples (70a70c) formed therein into which the dimples in the cover sidewall fit for mounting the cover onto the box.
REFERENCES:
patent: 1569864 (1926-01-01), Leppert
patent: 3200227 (1965-08-01), Karos
patent: 3412225 (1968-11-01), Rogers et al.
patent: 3866868 (1975-02-01), Fiss et al.
patent: 4295018 (1981-10-01), Borrelli
Emerson Electric Co.
Walczak David J.
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