Austrian self-tying knob

[Trade Journal]

Publication: Electrical Review and Western Electrician

Chicago, IL, United States
vol. 61, no. 8, p. 376, col. 2

New Insulator for Interior Work.


The accompanying illustration shows a new form of porcelain insulator for interior construction, which holds a wire or cable securely in place without the necessity for binding it or injuring the insulation in any way. This results in a saving of both material and labor and reduces the cost of installation.


Insulator for Interior Work.
Insulator for Interior Work.


The new insulator is made by the Porak-Isolatoren-Unternehmung, Wiedener Gurtel 28, Vienna, Austria, by whom applications for patents have been made in all civilized countries.


Researcher notes: 
Supplemental information: 
Researcher:Elton Gish
Date completed:September 28, 2009 by: Elton Gish;