The shield is a copper item that is screwed on to the front of the torch when all the other components have been put in. It is designed to protect the nozzle from splatter produced when piercing. The shield locates on the shield cap. Replacement of the shield is only required when the piece appears damaged by molten metal adhering to or melting it.
In cables an external mesh that shields the signal-carrying conductors from extraneous interference. In certain cables, the shield is only connected to one end of the cable and left floating on the other. In some very high-end designs, an electrical charge, usually battery-driven, is applied to the shield.
Protection from heat. Most glass workers who do not use long sleeved shirts pull a cotton sock with the toe end open over their arm when working bigger pieces. Wooden paddles held by other workers and full fledged flame gear are also used. Many workers put some kind of upright shield at the glory hole for body protection and to control ventilation and may shield yokes and hand tools. Most benches have a metal panel on the right arm to shield the gaffer's leg.
In an audio cable, a conductive cylinder around one or more center conductors that protects against unwanted electrostatic fields that could induce a signal, heard as a hum or buzz, across the conductors of the cable.
A broad piece of defensive armor, carried on the arm, -- formerly in general use in war, for the protection of the body. See Buckler.
Anything which protects or defends; defense; shelter; protection.
Figuratively, one who protects or defends.
A framework used to protect workmen in making an adit under ground, and capable of being pushed along as excavation progresses.
A large region of stable, ancient basement rocks within a continent.
The protion of a craton that is denuded or free of sedimentary cover. siderophile: A geochemical class of elements that form metallic bonds with iron, and are depleted in the Earth's crust and enriched in the core, relative to cosmic (solar)abundances.
An extensive area of a continent where igneous and metamorphic rocks are exposed and have approached equilibrium with respect to erosion and isostasy. Rocks of the shield are usually very old (that is, more than 600 million years old).
To ward off; to keep off or out.
A piece of armor worn on the forearm to ward off blows.
1. A wiring or covering over either a wire or circuit which blocks RFI from entering the wiring and thereby causing noise. In microphone wiring, it may be a foil type wrapping or a braided wire. Foil gives a 100% shield while a braided shield is less than 90%. The shiled of a wire is connected to a drain wire (in the case of a foil shield) which is then connected to pin 1 of an XLR type connector. 2. Faith–as in spiritual armour.
armor carried on the arm to intercept blows
See oral screen.
a bubble of energy that works like a window screen
Also called shielding. A screen or other housing (usually conductive) placed around devices or circuits to reduce the effect of electric or magnetic fields around them.
A housing, screen, or cover which substantially reduces the coupling of electric and magnetic fields into or out of circuits or prevents the accidental contact of objects or persons with parts or components operating at hazardous voltage levels.
A substance that lowers the levels of radiation, including lead (for gamma and alpha radiation), water, oil, polyethylene, polyurethane and other hydrocarbons such as paraffin (for neutron radiation).
An absorber placed between a radioactive source and an object to reduce the intensity of radiation. Synonym: shielding.
Material used to reduce the intensity of radiation that would irradiate personnel or equipment.
See rain-gauge shield, radiation shield.