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Sectional garage door Up-and-over garage door Garage Door Hardware. A garage door is a large door to allow egress for a garage that opens either manually or by an electric motor (a garage door opener). Garage doors are frequently large enough to accommodate automobiles and other vehicles. The operating mechanism is usually spring-loaded or ...
A pulley is a wheel on an axle or shaft enabling a taut cable or belt passing over the wheel to move and change direction, or transfer power between itself and a shaft. A sheave or pulley wheel is a pulley using an axle supported by a frame or shell ( block ) to guide a cable or exert force.
Forged door handles October 10, 2013 22-02: 275: Rock crushers: Fabric lampshades: Cake sprinkles/Hundreds & Thousands: Steam irons: October 17, 2013 22-03: 276: Indy steering wheels: Mixed salad: Wind turbines: October 24, 2013 22-04: 277: Blast doors: Lipstick: Artificial palm trees: Brass plaques: October 31, 2013 22-05: 278: Carbon fibre ...
Garage door openers (1 C, 7 P) Gears (5 C, ... Differential pulley; Differential screw; ... Mecanum wheel; Mechanical advantage;
Examples of rope and pulley systems illustrating mechanical advantage. Consider lifting a weight with rope and pulleys. A rope looped through a pulley attached to a fixed spot, e.g. a barn roof rafter, and attached to the weight is called a single pulley. It has a mechanical advantage (MA) = 1 (assuming frictionless bearings in the pulley ...
A simple dumbwaiter is a movable frame in a shaft, dropped by a rope on a pulley, guided by rails; most dumbwaiters have a shaft, cart, and capacity smaller than those of passenger elevators, usually 45 to 450 kg (100 to 992 lbs.) [2] Before electric motors were added in the 1920s, dumbwaiters were controlled manually by ropes on pulleys.
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