The next system, control D, to be discussed was characterized by the use of a four-point room thermostat which ... Figure 26 shows a block diagram for the thermostat with the relative positions of the contacts marked (1), (2), (3), and (4). ... system was for point (1) to make contact first, as the room cooled, thus closing one of the two contacts in the fan circuit. ... 26, the fan would start, and the travel of the thermostat blade would reverse, the blade then moving in the room heating direction.
|Title||:||Application of Model Tests to the Determination of Losses Resulting from the Transmission of Air Around a Mine Shaft-bottom Bend|
|Author||:||Arthur Cutts Willard, Cloyde Moffett Smith, Frank Erwin Richart, Rex Lenoi Brown, Vincent Stephen Day, Seichi Konzo, Alonzo Plumsted Kratz|