mercury switch


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mercury switch

[′mər·kyə·rē ‚swich]
(electricity)
A switch that is closed by making a large globule of mercury move up to the contacts and bridge them; the mercury is usually moved by tilting the entire switch.

mercury-contact switch

A wall-mounted switch used in interior electric wiring; contains a sealed glass tube of mercury which provides a silent contact when the switch is turned on.
References in periodicals archive ?
This further highlights the need to find a stable funding source for the National Vehicle Mercury Switch Recovery Program (NVMSRP), if the mercury from these convenient light switches is to be kept out of the environment.
They trigger a mercury switch that brings the counterbalance to its full height and then slowly falls to allow the mechanical clock to carry on working.
The National Vehicle Mercury Switch Recovery Program is designed to remove mercury-containing light switches from scrap vehicles before the vehicles are flattened, shredded and melted to make new steel.
Environmental Protection Agency (EPA) announced the establishment of the National Vehicle Mercury Switch Recovery Program a voluntary program designed to remove mercury-containing switches from the U.
Another option is the capacitance type, which is similar in performance to the photo eye yet closer in price to the mercury switch.
As recognition for the Company's leadership in recycling and mercury switch removal, the Steel Manufacturers Association (SMA) recently named Schnitzer Steel's two auto parts businesses as "Recycler of the Year.
29 /PRNewswire/ -- United States Steel Corporation recently marked the one-year anniversary of its participation in the national mercury reduction program known as the National Vehicle Mercury Switch Recovery Program (NVMSRP).
The program under discussion is focused on purchase specifications in two main categories: 1) restricted metallic scrap would contain no auto shred, oil filters, oily turnings, lead Components, mercury switches, chlorinated plastics, or free organic liquids; and 2) general scrap, which can contain auto shred, but must be depleted of organics and HAP metals, must address mercury though specifications or certification that the scrap dealer participates in new EPA mercury switch removal program.