Description This open wire lead supports a six-pin arm which supports six strands of aerial wire with insulators. Here, we have Hemingray No. 16 toll glass type insulators on wooden locust pins. A 20 span steel brace is seen with its carriage bolt attachment at middle photo bottom.Note the simple ties on this local (not long distance) transmission line. This is an exchange circuit and ties were relatively simple here: the basic Western Union horseshoe tie.Conductors are not strung from pole-to-pole and then wrapped several times around an insulator. That process would lead to fatique and line breaks with wind and other vibratory issues. Instead, the line wire is dropped on the crossarm with the installer using a one foot long tie of separate strand wire to wrap the continuous line wire to the insulator groove. The tie wire is then wrapped several times around the conductor, as here in this example.Ties developed for rural exchange service and high frequency carrier became quite a craft. There were over 20 different ties using various types of wire, copperweld, alumoweld, high strength steel, copper and iron materials. Also, when there was a need to further reinforce the conductor against aeolian vibration (wind) and long span stresses, Preformed armor rods were applied at the points where stress would inflict potential damage and the ties applied over them, making the line very stiff and self-damping.
Douglas G. Schema, Topeka, Kansas Member Since November 2011 Artist Statement Administrator of The Electric Orphanage, a non-profit historical preservation project highlighting the technological evolution of the electric power distribution and transmission industry, street and highway lighting technologies. Open wire telecommunications technology, which provided the early foundation for power system design, is also a part.
Mr. Schema holds two master's degrees and has worked in the telecommunications industry. His dual electric power and telecom background has facilitated contacts throughout the United States in order to preserve the heritage of the industries for which he has worked.
Utilizing 20+ years of experience with library science and bibliographic research (in the medical, allied health, scientific, engineering, public policy and state and federal document divisions), he has a significant grasp of the technical literature sources.
His artwork topicality and specialties ARE the electric and telcom industries specifically; having devoted over 50 years of work to advance their aims. Each piece is constructed with both creative care and technical expertise, to guarantee a high degree of technical accuracy and authenticity. This is a hallmark of both his artwork and photography. His artwork takes the form of both pen and ink drawings or highly detailed renderings in pencil.
Among the many utilities for which his works have been commissioned or requisitioned, are the Los Angeles Department of Water & Power, Southwestern Public Service Company/Xcel Energy, Tri-County Telephone Association, Northwestern Bell and many other organizations. He has had continuous relationships with nearly all the U. S. investor-owned utilities and hundreds of smaller municipals, public power districts, electric distribution and G&T cooperatives since the 1960s. Every year, the artist attends major conventions of the IEEE/PES, IES of NA, Investment Recovery Association, and other industry-related groups.
"The Song of the Open Wire" will initiate a host of upcoming websites in this technological arena of the utilities. Anticipate additional sites which will envelope both outdoor lighting as well as T&D/Substation technical topics and processes.