Publication: Scientific American
New York, NY, United States
A NEW SYSTEM FOR HIGH-TENSION INSULATION.
A patent recently issued to Louis Steinberger of Brooklyn, N. Y., covers a novel and improved system of insulation for high-potential electric conductors to be used in various relations and for various purposes, such as power transmission and for guy wires or cables employed as stays for towers or poles, masts, and other supports used in wireless telegraphy and telephony, as well as in regular commercial work. It marks a radical departure in the development of insulator systems.
The system comprehends a series of insulators, preferably of a thimble type, and a series of other insulators of a rod type, the thimble-type insulators being alternated with the rod-type insulators, and together therewith forming a flexible chain of parts which may be extended indefinitely.
The under surface of the thimble-type insulators will be, of course, at all times comparatively dry. Each thimble-type insulator acts like an umbrella covering the upper end of the rod-type insulator below it and connected therewith, thereby keeping it dry under the most unfavorable conditions (as, for instance, when all the insulators are subjected to the action of a driving rain); hence the group of insulators must always afford adequate insulation for all practical purposes.
This system will practically prevent leakage and undesirable grounding of the current either from conductors or from supporting structures for the same.
In this system the various parts may be readily detached and replaced by other parts, and the total number of parts may be increased or diminished at will after the original structure is built, this feature being especially important in instances where, after the installation of a conductor, the voltage is to be increased.
Not the least important feature of the system is the flexibility of the chain of units and that the structure as a whole when in operation is under spring tension, thereby insuring more or loss resiliency, so that the complete structure is relieved in all of its parts, as well as in its entirety, from the effects of sudden and abrupt accidental strains, usually so destructive to mechanism of this kind.