Waste sand from the production process tended to clog up the previous safety system, but Castell's heavy-duty KSE20 multi-key
electrical switches and Al access interlocks have been unaffected by the demanding environment.
A uniquely coded Castell key is released from the end of the lock and inserted into an
electrical switch located next to the bay door.
"It's like the main
electrical switch in a building.
At their home in Allerton, near Liverpool, his parents told how Andrew "talks" with an
electrical switch.
*
Electrical switch cover (left side, push-to-talk), NSN 5930-01-464-9981
Mike Walker of St Helens Chamber said: ``While the visit is likely to attract many companies from produce-related industries, it will be of interest to a variety of businesses since this area of France boasts a port, an engineering industry and an
electrical switch gear sector.
One of the latest developments out of Los Alamos (N.M.) National Laboratory is the super-fast, high-power
electrical switch. A pulse of laser light activates the device, turning electricity on in less than a billionth of a second.