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A sliding electric gate with electric motor and backup battery in case of mains failure. Note also the Infrared obstacle sensor located on the wall to prevent the gate from closing while a vehicle or other obstacle is in the way. Driveway gate openers can be the rollback (sliding) type that retracks a gate along the fence or wall on wheels or ...
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.
Website. www.automatic-systems.com. Automatic Systems, a subsidiary of Bolloré Group, is a company, specialising in the automation of secure entrance control. [1][2] The company designs and manufactures vehicle, pedestrian and passenger access control equipment. According to the IMS research, titled "The World Market for Pedestrian Entrance ...
Bar gate. Animation of level crossing booms lowering in Queensland, Australia. A bar gate in the Netherlands. A bar, post, pole, beam, or boom gate, [1] also known as a boom or a boom barrier, [2][3][4][5] is a beam or bar on a pivot used as a gate. The boom is lowered to block vehicular or pedestrian access through a controlled point or raised ...
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In electric power distribution, automatic circuit reclosers (ACRs) are a class of switchgear designed for use on overhead electricity distribution networks to detect and interrupt transient faults. Also known as reclosers or autoreclosers, ACRs are essentially rated circuit breakers with integrated current and voltage sensors and a protection ...
Many garage doors open upward using an electric chain drive, which can often be automatically controlled from inside the resident's vehicle with a small radio transmitter. [10] Garages are connected to the nearest road with a driveway. Interior space for one or two cars is normal, and garages built after 1950 usually have a door that connects ...
Heron used a similar application to open the gates to the city. [2] In 1931, engineers Horace H. Raymond and Sheldon S. Roby of the tool and hardware manufacturer Stanley Works designed the first model of an optical device triggering the opening of an automatic door. The invention was patented and installed in Wilcox's Pier Restaurant in West ...
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