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A curtain rod, curtain rail, curtain pole, or traverse rod is a device used to suspend curtains, usually above windows or along the edges of showers or bathtubs, though also wherever curtains might be used. When found in bathrooms, curtain rods tend to be telescopic and self-fixing, while curtain rods in other areas of the home are often ...
A curtain rod or traverse rod is a device used to suspend curtains, usually above windows or along the edges of showers, though also wherever curtains might be used. The flat, telescoping curtain rod was invented by Charles W. Kirsch of Sturgis, Michigan, in 1907. However, they were not in use until the 1920s. Kirsch also invented the traverse ...
Metric threaded rods are marked on the end with a color code to define the ISO strength class. The color codes are: [9] Unmarked — 4.6 class (tensile strength = 400 N/mm 2, yield strength 240 N/mm 2) Yellow — 8.8 class (800 N/mm 2, 640 N/mm 2) Green — A2 stainless steel (304) Red — A4 stainless steel (316) White — 10.9 class (1000 N ...
Russell A. Kirsch (June 20, 1929 – August 11, 2020) was an American engineer at the National Bureau of Standards (now known as the National Institute of Standards and Technology). He was recognized as the developer of the first digital image scanner , and subsequently scanned the world's first digital photograph – an image of his infant son.
A curtain is a piece of cloth or other material intended to block or obscure light, air drafts, or (in the case of a shower curtain) water. [1] A curtain is also the movable screen or drape in a theatre that separates the stage from the auditorium or that serves as a backdrop/background.
The working strength of a tie rod is the product of the allowable working stress and the rod's minimum cross-sectional area. If threads are cut into a cylindrical rod, that minimum area occurs at the root of the thread. Often rods are upset (made thicker at the ends) so that the tie rod does not become weaker when threads are cut into it.
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