Phone exchange insulators that have double grooves have been usually employed about residential places. The upper groove was for the principal line and the lower groove for the drop wire to the residence. A shot of two poles for a total of 23 glass insulators. This specific mold has the numbers just about running collectively as “21893”. Some of them are considerably thicker and heavier than their narrower “mold twins”. “1893” on a Script style moldThe “Prismic” embossing tends to have a much more angular look to the letters, with sharper corners and a crisp, “cut” larger-relief prism-like appearance in proof. https://rubin-irwin.blogbright.net/austin-insulators-inc-companies-of-rf-transformers-and-insulators Inside the Prismic embossing, there are two most important varieties of the quantity “2” including the “Looped” or “Cursive” two, and the “Swan” style 2. The pole on the left has eight CD 219 Hemingray-660's, two CD 231.2 Kimble-820's, and 5 CD 183 Hemingray-71's. Suitable pole has six CD 231.two Kimble-820's and two CD 183 Hemingray-71's. There had been 5 telephone poles with glass insulators leading to an old farm property. In this shot, the two glass insulators are CD 122 Hemingray-16s. Pole Top Discoveries' Early September Sale #2108 Closed # “M in a circle” mark used by Maryland Glass Corporation. Here, as embossed on the base of a smaller cobalt blue Bromo-Seltzer bottle. I’m sorry but this short article is mainly about the oldest primary form of “No 9” insulator which is classified in the price guides as embossing index number . There are a number of other variants, which includes the sort with the “No. I do list that embossing variation, along with numerous other big variants, in about the seventh paragraph down in this write-up. I haven’t tried to go into detail about the later, newer forms of the Hemingray NO. 9. CD 272 Whitall Tatum insulators are widespread in amber. Boyd glass “chick salt” covered dish in lilac glass. On the old poles the I&M lines have been up on the best crossarms though the CL&P lines would be on the bottom crossarms. Right after all the upgrades to the power grid, two neighborhoods in Fort Wayne about 10 years ago from nowadays in no way got the new upgrades. There are a quantity of other variants, like the sort with the “No. The second kind is the most popular, noticed on possibly 70% or additional of these units. All of the insulators photographed are from my individual collection. This trio of Hemingray insulators are still stained with carbon soot from their time spent in close proximity to a steam powered railroad line. Some collectors like to clean the insulators of this black residue but I don't touch them. Dark Teal Green ? Cd 162 Hemingray No 19 Glass Ins Closeup of “EVO 1” style, No 9 sideThe “EVO 2” is a seldom-observed variant which is a lot more lightly engraved, the lettering with rather squared-off orientation and comparable to the succeeding Prismic style. The Script embossing has a comparatively lightly-embossed excellent about the lettering. The “1893” date is typically crude with a noticeably “handwritten” appearance. I located five of these, the initially ones in my collection. Found along the former Rock Island close to Malcom, Iowa. On most of the examples with the “Looped 2”, although not all, the embossing tends to be rather modest. These two varieties of the “2” are believed to reflect the function of two diverse mold engravers. This style of insulator was broadly distributed across the United States, becoming utilised practically everywhere, and can be identified in virtually just about every state in the country. Nevertheless, I look to notice these are far more often found in the Midwestern and Western states, and less so in the Northeastern, East Coast and Mid-Atlantic states. This is an estimated value range only, primarily based on historical hobby collecting data. Insulator values vary extensively based on several things, which includes embossing, color, condition, mold variations, manufacturing anomalies, and other attributes. A different variant has a letter “M” placed to the left of “No 9”, most likely resulting from the mold worker beginning to engrave “MAY” on the second line, and then realizing his error. Two examples, both from the same precise Hemingray No 9 “STAMP” style mold. The a single on the suitable is the wider version (created right after the mold was re-tooled). It may perhaps have been manufactured months or years immediately after the one particular on the left. This pole along with the crossarms likely date back to the 1920's when the states upgraded most of its energy distribution during this time. All 3 of the actual insulators shown above were created in the second quarter of the 20th Century. It was a time when makers of glass insulators were getting to compete with porcelain insulator suppliers for marketplace share. Many low voltage glass insulators created throughout this period were formed in dark colored glass to compete with similarly colored porcelain things. The Price Guide lists D-512's in red amber at $50 - $75.
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