Illustrations of the theory and practice of ventilation : with remarks on warming, exclusive lighting, and the communication of sound (1844)
Reid, D. B. (David Boswell), 1805-1863 · London : Longman, Brown, Green, & Longmans · leaf 257
ise for the blower. All these parts connected with themovement of the valve or of the blower should be made of greatstrength, so as not to give way from any ordinary force, other-wise they give no satisfaction. Fig. 147 (No. 5); plan shewing the arrangements at the levelof the damper. Fig. 148 (No.… … Fig. 148. position, after which, on letting go e, the spiralspring returnsit to its proper place, and the pin g having been adjusted to oneof the openings in which it can be fixed, secures the valve inthe position in which it has been placed, the fire burning moreor less briskly, according to the…
