Ads
related to: overhead projector mount drop ceilingebay.com has been visited by 1M+ users in the past month
Search results
Results from the WOW.Com Content Network
Older overhead projectors used a tubular quartz bulb which was mounted above a bowl-shaped polished reflector. However, because the lamp was suspended above and outside the reflector, a large amount of light was cast to the sides inside the projector body that was wasted, thus requiring a higher power lamp for sufficient screen illumination.
Projection screens may be permanently installed on a wall, as in a movie theater, mounted to or placed in a ceiling using a rollable projection surface that retracts into a casing (these can be motorized or manually operated), painted on a wall, [1] or portable with tripod or floor rising models as in a conference room or other non-dedicated ...
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.
Most Boeing 757s feature ceiling-mounted CRT screens, although some newer 757s may feature drop-down LCDs or audio-video on demand systems in the back of each seat. Many Airbus A320 series and Boeing 737 Next Generation aircraft are also equipped with drop-down LCD screens.
A projection clock (also called ceiling clock) is an analogue or digital clock equipped with a projector that creates an enlarged image of the clock face or display on any surface usable as a projection screen, most often the ceiling. [1] The clock can be placed almost anywhere if only the projected image must be seen.
Overhead Projectors . Early 1960s-2015 Big metal boxes with glass tops and protruding upper appendages called overhead projectors once did the heavy lifting at corporate meetings, in classrooms ...
Ads
related to: overhead projector mount drop ceilingebay.com has been visited by 1M+ users in the past month