Publication: Western Electrician
Chicago, IL, United States
Porcelain Insulator for Use Without
The accompanying cut illustrates a new type of porcelain insulator "in action", as the manufacturer puts it. The illustration shows the wire in place within the knob. A close inspection of the knob to the right reveals the fact that the screw hole in the knob is on an incline. The structure of this latter porcelain special is so simple that no further explanation relative to this is necessary.
As will be readily seen, the insulator is a safe one; the wire must stay in the hole, hence with it in service there can be no mysterious fires from a misplaced wire. It is exceedingly economical and with the screw hole on an incline the insulator may be attached with ease in the most inexcessible places, as between joists and in similar situations. One screw, too, does the work and prevents the knob from turning. Besides this, if it be desired, a tie-wire can be used likewise on this knob. The knob excels also where the space in which it can be placed is small. Summarizing, there is needed no tie-wire, no half hitch and no wrapping the knob.
The Snyder-Hunt Company of Belle Plaine, Iowa, the manufacturer of this knob, calculates that through its use the following saving is made: One tie-wire measuring eight inches for each knob makes 8,000 inches for 1,000 knobs, which is 666 feet or more, depending on the size of wire used, which will cost more than $7; the time spent in cutting and typing the wire costs another $5 a thousand; the slanting screw or nail hole on the side (see cut) makes it easy to attach the knobs to a joist or the studding and it can be done in one-third of the time formerly required, saving an additional $2. Thus the total saving is at least $14 a thousand knobs.