Spon, Ernest, Haldane, Robert, Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 · London ; New York : E. & F.N. Spon · leaf 123
Electrics — Bells. 101 Fig. 52. (11) Another plan. — Make connec- tions like Fig. 54 at both ends: a, … Fig. 53. do) ; /, line-wire. The switch is made of a piece of wood with 3 studs at bot- tom, connected with the wires as shown. A strip of brass is made to slide over them so as to make contact, and com- municate with line wire. When not in use, the handle must be in contact with the centre stud at…
Workshop recipes · Technology · Industrial arts
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
