Search results
Results from the WOW.Com Content Network
Door closers at this time were known as a door spring and check. Later these two devices were combined into one unit that both closed the door and slowed the speed at which this was done. These early "door closers" used a pneumatic piston to check the speed, later models used a hydraulic or oil filled device for the same effect.
Fire/smoke dampers are similar to fire dampers in fire resistance rating, and also prevent the spread of smoke inside the ducts. When a rise in temperature occurs, the fire damper closes, usually activated by a thermal element which melts at temperatures higher than ambient but low enough to indicate the presence of a fire, allowing springs to ...
Albert Butz (1849–1905) was a Swiss-born American inventor and businessman who founded the Butz Thermo-electric Regulator Company that, through a series of re-organizations, name changes, and mergers, became Honeywell, Incorporated.
A top damper or cap damper is a metal spring door placed at the top of the chimney with a long metal chain that allows one to open and close the damper from the fireplace. A throat damper is a metal plate at the base of the chimney, just above the firebox, that can be opened and closed by a lever, gear, or chain to seal off the fireplace from ...
Switzerland said on Tuesday it was concerned by U.S. President-elect Donald Trump's proposals to raise tariffs and is considering how to respond if his new administration does so. Trump aims to ...
In this way, applying power to the "open damper" terminal causes the motor to run until the damper is open while applying power at the "close damper" terminal causes the motor to run until the damper is closed. The motor is commonly powered from the same 24 volt AC power source that is used for the rest of the control system. This allows the ...
Traders work on the floor of the New York Stock Exchange during morning trading on Aug. 23, 2024, in New York City. (Michael M. Santiago/Getty Images) (Michael M. Santiago via Getty Images)
message on a blog site on a top-secret computer network. Axsmith criticized waterboarding: “Waterboarding is torture, and torture is wrong.” Ms. Axsmith lost her job as well as her top-secret clear-ance, which she had held since 1993. She fears her career in intel-ligence is over.1 July 28: “DRAFT BILL WAIVES DUE PROCESS FOR ENEMY ...