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The backbone of any electric gate, whether automatic or not, is the electric gate motor, two distinct motor types exist hydraulic, or electromechanical. This is the electric device which actually enables the electric gate to open and close without having to manually push the gate.
The operator may or may not include a return spring to close the door in case of power failure while the door is open. Operators are often categorized by the means by which the motor's energy is applied. Electromechanical—the motor uses purely mechanical means to open the door: gears, cams, levers and such. This is the preferred type in the US.
Besam was an international supplier and manufacturer of automatic entrance equipment for commercial, health care and residential buildings owned by Assa Abloy. [1] The product portfolio included automatic doors, automatic swing doors, sliding doors and revolving doors, as well as air curtains and dedicated service and maintenance.
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.
Automatic mechanisms are also used for security purposes, being controlled by a keypad, swipe card, or biometrically controlled electromagnetic device. [citation needed] The latter include retina scanners, fingerprint readers, and voice recognition technologies. [28] Electric door closers may also be hooked to a building’s fire alarm system.
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