Trenle Porcelain Co. introduces the self-tying "Hook-It" knob

[Trade Journal]

Publication: Electrical Record

New York, NY, United States
vol. 30, no. 1, p. 19, col. 2

"Hook-It" Knob


The Trenle Porcelain Company, East Liverpool, Ohio, has recently placed on the market an unusually simple type of porcelain insulator for many kinds of wiring work. As shown in the accompanying illustration the wire is held in place by virtue of the slight curve or kink which it makes as it is fitted into the grooves of the insulator. The wire may be inserted or removed without the necessity of loosening or tightening the screw or nail which holds the insulator in place. The insulator measures 1-3/4 in. in height by 1-1/4 in. in diameter.


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Keywords:Trenle Porcelain Company
Researcher notes:The knob did not receive a patent.
Supplemental information: 
Researcher:Elton Gish
Date completed:January 14, 2021 by: Elton Gish;