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Electric gates alone, however solid and imposing they may be, cannot guarantee a completely secure environment electric locks, are often needed to boost the locking effectiveness of the gate motors. Electric gates are recommended to be used in combination with other security features to install a full security system .
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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.
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.
Half-height platform edge doors, also known as automatic platform gates, are cheaper to install than full-height platform screen doors, which require more metallic framework for support. Some railway operators may therefore prefer such an option to improve safety at railway platforms and, at the same time, keep costs low and non-air-conditioned ...
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