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A utility pole, commonly referred to as a transmission pole, telephone pole, telecommunication pole, power pole, hydro pole, telegraph pole, or telegraph post, is a column or post used to support overhead power lines and various other public utilities, such as electrical cable, fiber optic cable, and related equipment such as transformers and ...
The rod, perch, or pole (sometimes also lug) is a surveyor's tool [1] and unit of length of various historical definitions. In British imperial and US customary units , it is defined as 16 + 1 ⁄ 2 feet , equal to exactly 1 ⁄ 320 of a mile , or 5 + 1 ⁄ 2 yards (a quarter of a surveyor's chain ), and is exactly 5.0292 meters.
Telegraph_Poles,_Boston_-_geograph.org.uk_-_1206673.jpg (640 × 480 pixels, file size: 61 KB, MIME type: image/jpeg) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
A pin insulator is a device that isolates a wire from a physical support such as a pin (a wooden or metal dowel of about 3 cm diameter with screw threads) on a telegraph or utility pole. It is a formed, single layer shape that is made out of a non-conducting material, usually porcelain or glass. It is thought to be the earliest developed ...
A collection of objects from the Gutta Percha Company at the Great Exhibition of 1851, including a table and picture frames. The Gutta Percha Company was an English company formed in 1845 to make a variety of products from the recently introduced natural rubber gutta-percha.
In 1808 the Royal Telegraph Institution was created and Edelcrantz was made director. [59] The Telegraph Institution was put under the jurisdiction of the military, initially as part of the Royal Engineering Corps. [60] A new code was introduced to replace the 1796 codebook with 5,120 possible codepoints with many new messages.
Oppenheimer poles are galvanised iron telegraph poles. They consist of three oval sections that collapse into each other telescope-style for transportation. Once extended, the joints between the sections are clamped with collars. The pole is fixed to a base for support with a u-bolt. The poles were used in the construction of the Australian ...
There are a few borderline designs that are partly free-standing and partly guyed, called additionally guyed towers. Examples: Gerbrandy tower consists of a self-supporting tower with a guyed mast on top. Blaw-Knox towers Those few of the towers still standing do the opposite: They have a guyed lower section surmounted by a freestanding part.