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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.
Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow. An attacker with an appropriate receiver could discover the code word and use it to gain access sometime later. More sophisticated remote control systems use a rolling code (or hopping code) that changes for every use.
In May 1954, the Alliance Manufacturing Company first produced its own garage door opener and called it Genie. [2] In 1983 the company entered the home and shop vacuum market, and in 1985 it changed its name to Genie Home Products. [2] Overhead Door Corporation purchased the company in 1994. [2] The Genie Company is headquartered in Mt. Hope ...
One of these trains was converted to a battery electric multiple unit and branded as cityjet eco. The battery-electric version of the Siemens train is equipped to operate with batteries and overhead wires, with a battery only range of 80 km (50 mi) reaching a maximum speed of 100 km/h (62 mph) in battery mode.
The 1955 model upped the compression to 8.5:1 for 185 hp (138 kW) and 320 lb⋅ft (430 N⋅m) in the 88 and 202 hp (151 kW) and 332 lb⋅ft (450 N⋅m) in the Super 88 and 98. For engines built during the first part of 1955, the 324 skirted pistons had a reputation for failing due to the cast aluminum skirt separating from its steel interior brace.
AC units operate off 25 kV alternating current (AC) from overhead wires. Where clearances for the overhead wires on the Great Eastern Main Line, North Clyde Line and London, Tilbury and Southend railway routes were below standard, a reduced voltage of 6.25 kV AC was used. The Midland Railway units used 6.6 kV AC. Under the computer numbering ...
The Class 455 was originally to be classified as the Class 510, which were planned as a 750 V DC version of the Class 317. However, as the chopper control system at the time was not considered robust enough for the electrically rougher third rail Southern Region, they were fitted with GEC Traction camshaft-control systems instead. The Class 510 ...
The recovery of the Discoverer 14 return capsule (typical for the CORONA series) A KH-4B CORONA satellite Discoverer 14 launch 1960, Thor Agena "A" launch vehicle. The CORONA [1] program was a series of American strategic reconnaissance satellites produced and operated by the Central Intelligence Agency (CIA) Directorate of Science & Technology with substantial assistance from the U.S. Air Force.
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