Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 338
])ycontacts placed on the doors or windows so that the opening ofeither will cause the bell to ring. The same device may be usedon money-drawers, safes, etc. In the case of the electric fire alarm, the signal may be giveneither automatically when the temperature reaches a certain degree,or pushes… … << X H H CA > iJ >JU KOO H■< U O BI KHH a. < X u s < H UO o:sd._] < ??cS «en cu >< 5 •y: = |a ooen o 2 00 _ o> sa a, .. I. CO^(31 -a H = ^ g a <uvt^ o o a •ai>a esO
Architecture · Building · Carpentry
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
