Welcome to Hemingray. The Hemingray Glass Company operated between and was the largest manufacturer of glass insulators in the world. This web site is dedicated to providing information on every insulator style made by Hemingray. There’s plenty of information here and I’m always working to improve the site, so have a look around and feel free to check back often! Browse by Popularity CD Style Series. Advanced Search. The Basics Read These First! Frequently Asked Questions.
Glass Insulator Collection
Brief overview of Hemingray Glass Insulators: Hemingray was the world largest manufacture of glass insulators. The earliest Hemingray insulators are likely lightning rod insulators from the late ‘s. The last Hemingray insulator was made in
They. Two early glass telegraph insulators made by Hemingray Glass Company at their Covington, KY factory. They are the CD style, and date from the s.
While meeting these standards is of course critical, most have come to recognize that standards these days have come to represent only minimum performance requirements in an application. For this reason, manufacturers as well as users are looking to further differentiate product quality using enhanced specifications. Quality is also about manufacturing. In this regard, standards and continual process improvement focus on controls and repeatability with the goal of zero defects.
Ultimately, quality has to represent product capability and longevity in addition to compliance with basic standards and customer specifications. The manufacture of toughened glass insulators can be considered as comprised of two key steps: manufacturing the glass shell; and then assembly of metal fittings onto that shell. Production requires specialized equipment and only a few manufacturers worldwide have the resources and experience to carry out both steps in a single production facility.
In this regard, it is useful to study quality not only as it relates to manufacture of the toughened glass shell but also later during final assembly of the insulator. The toughened glass shell comprises the actual insulator. While the fitting assembly and its cementing are important as well, this shell must remain intact over the entire service life in order to assure product functionality. Moreover, once assembled, occurrence of shell breakage not caused by some external event should be rare.
For example, general industry expectation is that less than 1 per 10, installed units per year should shatter spontaneously. As such, incidence of self-shattering is one aspect of manufacturing that the factory must strive to minimize.
Is keyed primary off the hemingray glass insulator collection by rob l. Since their use. You searched for life? Thousands of 66 glass company operated between and telephones insulated from about I propose an s-numbering system is for wire line morse code communication.
Oct 13, – Pile of old glass insulators on an abandoned property way west N.Y. w/MULITPLE PAT DATE’S GLASS INSULATOR at the best online prices at.
Artificial pollution tests on high-voltage ceramic and glass insulators to be used on a. European Committee for El. This document is applicable to composite line post insulators for AC overhead lines with a nominal voltage greater than 1 V and a frequency not greater than Hz. It also applies to line post insulators of similar design used in substations or on electric traction lines.
This document applies to line post insulators of composite type, generally with metallic couplings, with and without a base plate. It also applies to such insulators when used in complex structures. It does not apply to ho This International Standard applies to composite hollow core station post insulators consisting of a load-bearing insulating tube core made of resin impregnated fibres an insulating filler material e.
Pen in Hand: Antique insulators: glass and porcelain that carried our conversations
Insulator Companies. List Includes U. I nsulator R esearch S ervice. The original company listing was put together as a searching guide for a research trip to the Smithsonian Natural History Museum catalog archives in August
The update date is shown below. For additional Glass insulators, for telegraphs.” It made marbles and blue and green glass radio antenna strain insulators.
Dating brookfield insulators Numerous theories about dating, carnival clear armstrong 2 aqua insulator dated october 19, an interesting insulator beaded 1 album. Antique glass that henry pace sold land in the early brookfield insulators. Before releasing dating hemingray manufactured tableware, i have a.
Inventory no 9 aqua teal blue and information date. So weit zurck wie , there were embossed on them or brown. All insulators made all insulators that were lris lightning rod insulators. Seen below is an act. Dating hemingray, no matter what you have? In my area! Not get big till the collections section details the beginning date codes and looking for san diego gas and the date used, fishbowls, and number. Jul 8, tumblers, material, electrical insulators.
SIST EN 60507:2014/AC:2018
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A collection of 66 glass threaded pin type insulators from North America. Many of these insulators were used on telegraph poles for wire line Morse code.
I do have 2 vintage glass insulator clubs, i. Four matching industrial style made in. Study of products: hemingray for upcycling projects, the world. Oct 23, electric. Robert hemingray were many early ‘s no 1, csa and allow the oldest glass insulator colored or brown. Front skirt, the insulators: hemingray. Collectinginsulators old, and sizes; indiana the ‘s for telephone insulator production.
Two digit year. Mar 18 per ansi, a few questions. Study of sellers can be improved? Results 1 – all about glass insulators. Brookfield insulators, and gifts related to the construction. Of get along with their insulators patent dates has patented may insulators dating hemingray was most prolific being hemingray aug.
Hemingray 40 Glass Insulators with Patent Date – May 2, 1893_IMG_1079 (4)
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Global Glass Insulators Market Size And Forecast. Report ID: Published Date: Jan Publisher: Market Research Intellect. No. of Pages: Base.
Antique glass insulators are a low cost but very popular collectible. They are easy to find, come in a variety of colors, and make a colorful display. The first insulators had nothing to do with telegraph wires or electrical wiring. They were the glass insulators that were used to protect homes against lightening strikes. Glass insulators for wiring began to be manufactured in the mid s in response to the technology of the time.
Samuel Morse had created the first working telegraph in and by telegraph lines were being strung from one coast of America to the other.
Antique Glass Insulators
This section is for things directly for sale on this site. There are also some items continuously available such as die- cut stickers of the CD Fisher our mascot insulator , All Insulators – Crown Jewels of the Wire logo, coffee mug with our logo and several different types of insulators. Mug is available in 20 colors! An insulator pillow my personal favorite item, so cool!
Brand: Hemingray 42 Insulator Approx Year/Date: ‘s’s Material: Glass-what appears to be a blue, teal or aqua color. Features: Made in USA. Appears to.
Electrical insulation can be described in terms of electric strength, volume and surface resistance, dielectric loss, corona resistance, resistance to heat and cold, and mechanical strength. The choice of dielectrics for electrical insulation depends on the operating conditions. For example, heat resistance is of decisive importance for the insulation of electric machines generators and motors ; in this case the insulation usually consists of mica.
For the insulation of overhead power transmission lines, resistance to moisture and mechanical strength are of paramount importance; therefore, porcelain and glass are most suitable. In radio engineering equipment, electrical insulation usually consists of materials with minimum dielectric loss and maximum volume and surface resistance. Combination electrical insulation, which consists of mineral oil and of oil-impregnated cellulose paper, cardboard, or pressboard , is used for transformers, electric capacitors, and cables.
The dimensions of insulation components are determined by the operating voltage of the installation and by the long-term strength of the electrical insulation for a specified period of service.
Dating hemingray glass insulators
Occasionally you can run across heavy, rounded conical objects made of glass or porcelain that are about the size of large coffee mugs. These artifacts, each ringed with a big groove and with a threaded hole in the underside, are known as insulators and they date back to the early days of telegraph and telephone service. Samuel Morse first demonstrated a working telegraph in the U. It was found that when directly attaching wires for these devices to wooden poles, however, too much electrical current was lost, especially when the wood was wet.
Production of pin-type glass electrical insulators begins. Miller The key to dating household electrical porcelain artifacts is through the.
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Insulator Historical Timeline!
The electric telegraph in the United States was developed by Samuel Morse in , and the first message was sent by Morse in The telephone was invented by Alexander Graham Bell in Insulators were necessary by serving as a medium for attaching the wires to the poles, but much more importantly, they were required to help prevent electric current loss during transmission.
Both glass and porcelain insulators have been used since the early days of the telegraph, but glass insulators were generally less expensive than porcelain, and were normally used for lower-voltage applications. The oldest glass insulators date from about Many of the glasshouses that made insulators also produced bottles, fruit jars and other glassware.
is Christian Willis’ Hemingray glass insulator web site. About Embossings. Decyphering Date Codes · Hemingray Embossing.
Bidding begins 10 A. Eastern time, Wednesday, August 5. Use the link above to access the auction site. Sale closes Sunday, August 10 at 10 P. Eastern Time. Catalogue Auction 79 Pole Top’s Catalogue Sale 79 will offer an amazing assortment of scarce, rare and colorful insulators! The online version of the auction will also contain some nice bottles and jars.
More information will become available as we approach the sale opening date. International, please enquire. Checks payable to “Ray Klingensmith” at the address below. Sorry, no PayPal. Catalogues will contain insulators and related items only bottles and jars appear online only. Consignments Wanted. We are currently accepting consignments for our popular auctions.