Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 449
electrical means—and is notreally necessary; the short circuiting of the armature through re-sistances in the controller is all that can be desired. In many elevators where a variable speed is desired, connec-tion is made between the armature and a solenoid connected to a camps •Sivitch … 1 — 1 1 1 1 o 1 ? 7 ? < ? 1 1 1 lIiuWDijirif •Series Field Innjuuuiar•Shixnt Field Fig. 21. (C) Wiring Diagram for Mechanical Controller. switch which is kept closed except when the solenoid is actuated.This switch closes a circuit between the shunt field coils and a bankof resistances in the…
Architecture · Building · Carpentry
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