H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/246
H01H 85/02 (2006.01) H01H 33/57 (2006.01) H01H 85/43 (2006.01)
Patent
CA 1043400
IMPROVEMENT IN EXHAUST CONTROL DEVICE FOR CIRCUIT INTERRUPTING DEVICES ABSTRACT: An improvement in an exhaust device to absorb the energy of exhaust gasses released during operation of a circuit inter- rupting device such as a power fuse or an expulsion fuse is disclosed. The exhaust control device includes a hollow housing coated with a corrosion resistant coating mounted to the circuit interrupting device by means of an adapter, composed of a corrosion resistant material such as brass, which is retained in a counterbore within the housing by rolling or folding over the extended upper rim of the housing so that the coating is not damaged. Alternatively, a steel header, welded to and plated along with the steel housing shell, within which the threaded brass adapter is installed, may also be used. The same rolling or folding operation may be used to secure a plated outlet end wall. Baffles positioned within the housing for partitioning the housing into chambers for cooling and filter- ing the hot exhaust gases, for changing the direction of flow of the gases and for attenuating sound are held in place by crimping the hollow housing around the baffles so that the plating is not damaged. An annular ex- pansion space formed between the hollow housing and an inner cylindrical shell increases the surface area of the hollow housing which is exposed to the blast of exhaust gases emitted from the fuse and provides an additional expansion chamber for receiving the exhaust gases produced by the interrupting device. A labyrinth plate with circumferential notches formed therein and arcuate ridges formed within and adjacent to said notches, forms gas diverting channels and a labyrinth flow pattern exhaust path to the exit ports formed within an outlet end wall.
254612
Scherer Henry W.
Swanson Roy T.
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