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A bar that is installed on a panic exit device located on a door and serves to unlock the door and, sometimes, to activate an alarm.



Related Terms

AZIMUTH BAR

An instrument for measuring azimuths, particularly a device consisting of a slender bar with a vane at each end, and designed to fit over a central pivot in the glass cover of a magnetic compass.

DIPPER TRIP

A device which releases the door of a shovel bucket.

DOOR CLOSER

  1. A device that makes use of a spring for closing, and a compression chamber from which liquid or air escapes slowly, to close a door at a controlled speed. Also known as door check. 2. In elevators, a device or assembly of devices which closes an open car or hoistway door by the use of gravity or springs.

BEARING BAR

An instrument for measuring bearings, particularly a device consisting of a slender bar with a vane at each end, and designed to fit over a central pivot in the glass cover of a magnetic compass. See also AZIMUTH BAR.

DROP BAR

  1. Protective device used to ground a high-voltage capacitor when opening a door. 2. A bar that guides sheets of paper into a printing or folding machine.

BAR SUPPORT

A device used to support or hold steel reinforcing bars in proper position before or during the placement of concrete. Also known as bar chair.

CROWBAR

  1. An iron or steel bar that is usually bent and has a wedge-shaped working end; used as a lever and for prying. 2. A device or action that in effect places a high overload on the actuating element of a circuit breaker or other protective device, thus triggering it.

BAR CLAMP

A clamping device consisting of a long bar with adjustable clamping jaws; used in carpentry.

EQUALIZER

  1. A network designed to compensate for an undesired amplitude-frequency or phase-frequency response of a system or component; usually a combination of coils, capacitors, and resistors. Also known as equalizing circuit. 2. A bar to which one attaches a vehicle's whiffletrees to make the pull of draft animals equal. Also known as equalizing bar. 3. A bar which joins a pair of axle springs on a railway locomotive or car for equalization of weight. Also known as equalizing bar. 4. A device which distributes braking force among independent brakes of an automotive vehicle. Also known as equalizer brake. 5. A machine which saws wooden stock to equal lengths.

OPTICAL BENCH

A rigid horizontal bar or track for holding optical devices in experiments; it allows device positions to be changed and adjusted easily.

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