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The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. [1] Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.
Chamberlain, LiftMaster, and Craftsman have interchangeable parts, primarily the gear and circuit boards. The greatest difference between the brands is that Chamberlain and Craftsman operate on a square shaped split-rail system, while LiftMaster consists of one single solid piece of inverted t-shaped rail.
The i-Opener was a low-cost internet appliance produced by Netpliance (later known as TippingPoint) between 1999 and 2002. The hardware was sold as a loss leader for a monthly internet service. Because of the low cost of the hardware, it was popular with computer hobbyists, who modified it to run desktop PC software without the internet service.
YouTube Premium offers original films and series produced in collaboration with professional studios and YouTube personalities, [10] under the banner YouTube Originals. For multi-episode series, the first episode of a YouTube Originals series is available free. [ 10 ]
A two-pulley jackshaft redirecting belt power from horizontal to vertical. A jackshaft, also called a countershaft, is a common mechanical design component used to transfer or synchronize rotational force in a machine. A jackshaft is often just a short stub with supporting bearings on the ends and two pulleys, gears, or cranks attached to it.
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A Crocodile of the Swiss Federal Railways.Each set of 6 driving wheels is driven by a jackshaft between the driving wheels, gear-driven by a pair of traction motors. A jackshaft is an intermediate shaft used to transfer power from a powered shaft such as the output shaft of an engine or motor to driven shafts such as the drive axles of a locomotive.
Movies often depict a safe-cracker determining the combination of a safe lock using his fingers or a sensitive listening device to determine the combination of a rotary combination lock. Other films also depict an elaborate scheme of explosives and other devices to open safes. Some of the more famous works include: