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The ceiling projector or cloud searchlight is used to measure the height of the base of clouds (called the ceiling) above the ground. It is used in conjunction with an alidade, usually positioned 1000 ft (300 m) away and wherever possible set at the same level. The projector is normally set at 90°, although 71° 31' may be used, in relation to ...
Following a fire at the drive-in theater's projection booth, Doc Green gives Mr. Bunty a Holomorphic Projector to replace the movie projector as Kade plans to find a copy of his favorite Kaiju movie "Attack of Humungado" (a movie about the Godzilla-like monster Humungado) to give it a test run. During the test run, a power surge from Mr. Bunty ...
The projector was made by the manufacturing firm G. A. Harvey of Greenwich, which delivered a batch of ten projectors less than six weeks after receiving the drawings. By September, the firm had completed 1,000 launchers from the order for 2,500 as the Mark 1 for the Army and 3-inch Harvey L. S. Projector for the Navy, most of which were fitted ...
A ceilometer is a device that uses a laser or other light source to determine the height of a cloud ceiling or cloud base. [1] Ceilometers can also be used to measure the aerosol concentration within the atmosphere. [2] A ceilometer that uses laser light is a type of atmospheric lidar (light detection and ranging) instrument. [3] [4]
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Approved drop out (or drop-out) ceilings allow the installation of a dropped ceiling beneath existing fire sprinklers because the tiles, sometimes called melt-out ceiling tiles, are heat-sensitive and are designed to fall from the dropped ceiling suspension grid during a fire, allowing the sprinklers to spray their water.