Publication: Western Electrician
Chicago, IL, United States
The Safety Insulator.
In the accompanying cut is shown the Safety insulator, recently placed upon the market by McLeod, Ward & Co., New York. This device is manufactured with the idea of placing before the trade a perfect insulator and one that would not injure the insulation of the wire. This insulator is constructed of porcelain and is made with a view of being mechanically and electrically simple. There is a slight raise on the upper piece of porcelain so that when the lower piece is screwed up the wire is clamped firmly and is thereby bent slightly so that it cannot be pulled in
and is thereby bent slightly so that it cannot be pulled in either direction. As a matter of convenience the insulator has been so designed that it can be readily put up without the use of a screw-driver or other tool. Three sizes are made: No. 1 takes from No. 18 to No. 12 B. & S, gauge; No. 2 takes from No. 12 to No. 6 B. & S. gauge, and No. 3 takes from No. 6 to No. 0 B. & S. gauge. The insulator is furnished with screws to suit the class of work required, different screws being used for wood work, iron work and plastered ceiling.