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At the end of the 19th century, electric gates were also used at horse racing tracks. [5] The first commercial electric gate systems were hydraulic and designed for reliability and ease of use. The cost of the hydraulic systems however meant that other companies started producing more affordable electromechanical alternatives.
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.
The invention was patented and installed in Wilcox's Pier Restaurant in West Haven, Connecticut for the benefit of waiters carrying plates of food and drink. The entire system plus installation was sold for $100. [3] [4] In 1954, Dee Horton and Lew Hewitt invented the first sliding automatic door. The automatic door used a mat actuator.
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Double doors may be installed to allow for maintenance of large equipment. [1] If utility service entrance equipment and metering is present in the room, special provisions may be made for access by utility personnel. Fire detection and fire suppression systems, such as carbon dioxide, may be installed.
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