On the morning of July 2, 1956, an explosion involving scrap Thorium occurred at the Sylvania Electric Products Metallurgical Laboratory.
Sylvania was experimenting with large-scale production of Thorium metal from Thorium dioxide. Part of the process of shutting down this experiment was the reprocessing and burning of thorium metal powder sludges that went unprocessed during the experiment. It was during the incineration of the this material that the explosion occurred.
At the time the metallurgical properties of Thorium were not well understood.
More information can be found at this PDF document (http://ma.mbe.doe.gov/execsec/foia/request/42070.pdf).
SylvaniaElectric (Canada) Limited is a wholly owned subsidiary of SylvaniaElectricProducts Inc. of New York.
Products manufactured by the parent organization were sold in Canada for many years before the decision to manufacture there was reached.
Yet another Sylvania innovation is a high-tensity lighting system for guiding planes during periods of limited visibility, one of which was installed at a major Canadian Military base in 1958.
Wiring to comply with the electrical code, workmanship, and final code approval are the responsibility of the installing electrician, assured by an inspection by the local electrical inspector.
The new electrical panel is then mounted in place and all of the existing wires are routed back into the new panel, strain reliefs secured, and wires routed to breakers in the new panel.
The electric panel is not built into a finished wall (for example exposed in a basement or garage), so that all of the panel's exterior is readily accessible, and the panel capacity is not being upgraded.
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