Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 139
g the point A about two inches above the top 126 Steam Engineering row of tubes. The clamp thus formed is filled with acourse of side arch fire brick^ Fig. 50, and will form acomplete and self-sustaining arch, the bottom, B, restingon the back wall, and the top, A, supported by an angleiron riveted… … Fig. 51 wall to the other across the rear end of the boiler. A fifty-four-inch boiler would thus require six clamps, a sixty-inch boiler seven clamps, and a seventy-two-inch boilerwould require eight clamps; the length of a fire brick beingabout nine inches. In case of needed repairs to the backend…
