ELECTRIC CONTROL OR SIGNALING DEVICE

摘要

An electric control or signaling device to be assembled through an opening formed in a wall, and including a tubular metal body which is to engage with a first surface of the wall, wherein the body includes a threaded cylindrical portion to be inserted into the opening and an attachment device including a metal clamping ring to be screwed onto the threaded cylindrical portion of the body to attach the control or signaling device through the opening, and a metal attachment plate to be applied against a second surface of the wall opposite the first surface by the clamping ring.