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 ?
The costs associated with removing, storing and disposing of the mercury switches will be taken on by the vehicle manufacturers.
The key part of that legislation is requiring producer responsibility from the automakers to help finance and recover the mercury switches that are out there in existing vehicles."
Until November 1, simple depollution steps, including the removal of oil components, batteries and mercury switches, will satisfy legal requirements along with the customer selfcertifying it has been done.
Unveiling the SSN DIN-rail mount for replacing low-amperage mercury switches. Also introducing the THV power controller and new MA900/901 series 1/4-DIN controller with up to eight channels.
A few states have laws mandating that mercury switches be removed from cars before crushing them for landfill.
He also points out that many state vehicles contain potentially hazardous mercury switches, and that a statewide effort is underway not only to stop buying cars with mercury in them, but to capture the toxic metal in the fleet now.
The program's sponsors hope to replace 10,000 mercury switches. For no charge, the mercury switches will be replaced with a ball-bearing switch.
During the first few days of the WASO, numerous mercury switches began disappearing out of local condominiums.
The collars had mercury switches that changed the signal from the collar if the deer was bedded or up and moving around.
Additionally, some of the older timers are said to contain mercury switches found to be a potential environmental hazard.
Potential sources of elemental mercury in residential settings include mercury switches, mercury-containing devices (e.g., thermostats and thermometers), and mercury obtained from laboratories, dental offices, or other industrial sources.
Staff who provide direct supervision carry two-way radios with built-in mercury switches that activate if the radio is placed in a horizontal position.