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A garage door is a large door to allow egress for a garage that opens either manually or by an ... pulley, or cable breaks under tension and makes the system ...
The company continued to expand its product line in the 1920s and 1930s, adding a wide array of products, including barn cupolas, exhaust and intake hoods and louvers, fans, valves, pulleys, power hoists, concrete mangers, a patented garage door hanger (using overhead door tracks for ease in opening and closing), playground equipment (including ...
A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain. The earliest evidence of pulleys dates back to Ancient Egypt in the Twelfth Dynasty (1991–1802 BC) [1] and Mesopotamia in the early 2nd millennium BC. [2]
A block is a set of pulleys or sheaves mounted on a single frame. An assembly of blocks with a rope threaded through the pulleys is called tackle. The process of threading ropes or cables through blocks is called "reeving", and a threaded block and tackle is said to have been "rove". [7]
Garage door openers (1 C, 7 P) Gears (5 C, ... Cable robots; Cam (mechanism) Cam timer; ... Differential pulley; Differential screw;
Custom wires and cables: Train wheels: October 23, 2009 14-05: 174: ... Garage door openers: Bicycle seats: June 19, 2014 ... Racing pulley systems: Inductors ...
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An overhead line or overhead wire is an electrical cable that is used to transmit electrical energy to ... If tension is lost the pulley falls back toward the mast ...
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