(wow) Words Of Wonders Level 2743 Answers – We begin this section with a discussion of cross assemblies (wood or metal) for open wire construction.
Depending on the mill or lumber company that manufactures the crossbars, the shapes and treatments vary greatly. Many customer organizations have specified the type of wood and type of storage for large orders. Other utilities, telephone companies, and railroad procurement were guided by national standards such as NELA (NEMA), ARA (Communications Division of the Association of American Railroads), REA (Rural Electric Power Administration), Bell System (AT&T Process and recommendations). As well as independent telephone associations with national or regional interests.
(wow) Words Of Wonders Level 2743 Answers
For example, if we take a Midwestern merchant, the Hughes Brothers of Seward, Nebraska, who began assembling equipment for telephone companies, their wood was Washington fir. A quote from their last article in the 1930s corresponds to the time when open-arm strings were best sellers:
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“Washing fir crossbars are made from selected, old-growth, yellow fir, which gives them strength and durability, exceptional strength and light weight. The Washington Fir can be considered a Douglas Fir, but not all Douglas Firs are Washington Firs. is Local, the general name given to all species of fir grown in the Rocky Mountain and Intermontane regions west of the Cascade Mountains. Douglas fir is usually red or yellow in color depending on the speed. The fast-growing tree is usually red. the slow-growing and old wood is usually yellow in color and is selected for fir crosses by Hughes Washington. The stay in the tree is considerable. main advantage of giving uniform strength in all sizes of inja-climates, and they have for many years had a satisfactory record of operations in all parts of this country, and even further afield, in different parts of the world. gives It is recommended to focus on transparent applications and choose materials with close grains to minimize durability. “
From the Electric Supply Company General Catalog published in the late 1920s, these are the standard specifications for wooden junctions. Also listed are electrical distribution and transmission, as well as types of open wire signaling and communication. The National Electric Lighting Association (NELA) became NEMA (National Electrical Manufacturers Association) in the mid-1930s. Usually, pins, brushes, screws and other accessories are provided independently of the cross. However, several manufacturers provide wooden pins with criss-cross instructions. This was mainly telecom and signal circuit armature (for railway use). The metal pin handle is not supplied as a part. Metal pins are purchased separately and installed by the user.
2A – Single wire length up to 600 feet. Typically, these arms support two end C-braces. A notch is cut in the arm to prevent the arm from swinging on the circular shaft. A 5/8″ or smaller carriage bolt will be used to attach the arm to the beam. Another advantage of this arm was that there was no need for steel or wood brackets on the contact parts of the line. The design (notch) prevents it from sticking to the arm . However, at the transition points, a 20″ span steel bracket was required to balance the weight of the bracket. The REA/RUS allows the arm to be positioned vertically rather than offset, so that two transfer insulators can be placed on the pins, and the actual arm to act as a switch bracket instead of putting a separate carriage bolt and metal point type bracket. Offset arm. Also this type of arm is widely used in REA designs as dead ends and double sided arms. Bell, GTE, Independents they used wooden side brace construction.In general, the line was not expected to grow by adding more pairs to existing buildings.
This little four-pin arm was four feet long and was supported by a single 20-inch span bracket and a 5/8-inch bolt. Wooden pegs are usually supplied with the unit. Often, the sign is cut by hand to create a log. This unit was sometimes used as a four-wire party line switch or service station line. Sometimes, it was added to existing lines, to support the lines of neighboring farm parties, as a ground building for the combined use of interchanges or tolls.
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The hands were identical in all but the type of needle (wooden or metal) held in the hands. They differed in that “two pairs” were not included and the separation between poles was 30 inches instead of the 16-inch separation of pole pairs in the standard 10-pin. The steel braces were of the 30-inch span type and secured with 1/4 carriage bolts. It is 10 feet long and all holes are drilled according to the manufacturer's instructions. Also, the steel pin type (S-8) is not fully developed; Both the pin and handle required separate orders. However, some manufacturers equip their W-8 sleeves with wood pins already installed. The distance between the two sides of the arm was twenty-six inches. There were eight inches between these pairs of locking pins. Distance between arm span bracket attachment points is 21 1/2 inches.
Wood W-8 sleeve pins are bored through 1 1/4-inch pin holes. Steel pin (S-8) sleeves are bored for 11/16 inch pins.
They were 6′ long arms with a specially designed wooden cabinet. Three pines on each side of the central beam. A 20-inch junction tensioner was used to correct lateral tilt of the grafted arm. A 3/8″ x 4″ carriage bolt was used to secure the bracket. At the bottom of the switch was a hole in which two pieces of metal were mounted on a 9/16 inch diameter post. At this point, the lag screw is fixed.
The N-type arm was used when a narrow band was a problem. Although it was equipped with wooden pins, the length of the arm was a short two feet, and the distance between the pins was 8 inches. The 20 inch brake lines on either side of the arm supported the weight of a 10. I saw this in Iowa using a CONTEL as a standard tangent arm. It is unusual to see, but it was used outside of various contexts when it was used as “illegal” instead of “law”.
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We've talked about this common wire elsewhere on this site, but it's often seen in open-wire construction where cross-mating and charging dominate the construction. These 10-legged arms may have 8 to 10 spines. Almost all that is specified by any commercial communications and rail/transport company is 10 different pins. This hand can use metal pins with wooden ends. Braces are required to balance the load stress on these types of 30-inch two-arm span braces. Sometimes, the 10B arm can be modified to add another pair of pins, resulting in a 12-pin arm with 10 inches (or 11 depending on the owner) between the pins. This is rare but has been noted. Geddes, South Dakota had a 12-pin lead arm before 1972. The 10A arms had 16 inches of separation between the two poles. The 10B had 18 inches of separation between the two pairs of arms.
16A was a unique feature of the open wiring space. Supported by two 30″ span steel beams, the unit was 10′ long with 4″ between each pin to create eight pins on either side of the arm. This strong separation was necessary in the specific situation of right-of-way and long construction. In my many years of looking at open wire construction, I have seen 16A arms a few times in my life. They are completely different. In January 1979 the manufacturers discontinued this type of crossarm.ZLINE 30in. Self Clean & True Convection Automatic Double Oven Edition Stainless Steel with Accents (AWDZ-30)
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