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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.
Electric eye for a garage door opener. An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam.
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 ...
Sick AG (stylized in all capital letters), based in Waldkirch (Breisgau), Germany, is a global manufacturer of sensors and sensor solutions for industrial applications. The company is active in the areas of factory, and logistics, and process automation. The company employs 12,185 employees worldwide and achieved sales of EUR 2.3 billion in ...
The photo also shows an unrelated distribution transformer, which reduces 4160 V to 240/120 V. Closeup of overhead powerline sensor hanging from one phase of a 4160 volt powerline. In the photos on the right, an antenna on the sensor transmits data to a communication device attached to a nearby utility pole.
SGX Sensortech Limited is a manufacturer and research company of sensors and detectors for Industrial Safety, and Environmental Monitoring.It is headquartered in Neuchatel, Switzerland with research and manufacturing sites in Katowice, Poland and Shanghai, China.
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