Edwards Signaling and Security, now a part of GE Security, Plainville, Conn., has appointed DJ Ryall Electrical Group, Denver, as its rep for Colorado.

Alkco, Franklin Park, Ill., has appointed Resource Lighting Inc., Virginia Beach, Va., as its product representative throughout eastern Virginia. Lighting & Controls, Parma, Ohio, is now responsible throughout eastern Ohio.

Wm. B. Bleiman & Sons Inc., Philadelphia, has expanded its territory of representation for Western Tube & Conduit Corp., Long Beach, Calif., to include eastern Pennsylvania, southern New Jersey, Delaware, Maryland, northern Virginia and Washington, D.C. Additionally, the agency has appointed Ed Harvey sales manager.