The Golden Era.....

 
Automatic Gate: Muslims’ invention makes life easier

AL-JAZARI INVENTED the earliest known automatic gates, which were driven by hydropower. He also created automatic doors as part of one of his elaborate water clocks.

Today a gate operator is a mechanical device used for opening and closing a gate, such as one at the end of a driveway. Automatic gate openers are typically powered by electricity, hydraulics or solar energy.

Modern electric powered gate openers are powered by an automatic arm which can open and close a gate. An electric gate operator uses a circuit to open, close or reverse the gate when it receives a signal from an access control.

Automatic gate operators can also be fitted with solar panels to operate without high voltage power. Solar power is used when an electricity source is not immediately available, or the owner wishes to use a clean and renewable energy source.

Electric gate openers are operated using access controls. These access controls can include remote controls, intercom, keypads and exit sensors. However, not all gate operators are compatible with all accessories. For example, certain operators require devices that must be wired where as others can be used wirelessly.

Most automatic gate operators are built for use with either swinging or sliding gates. A swing gate operator consists of a box and an extended arm which opens and closes the gate. A sliding gate opener slides a gate or fence horizontally past the operating unit.

Modern Automatic Gate System requires power to operate the system. They range depending on the system; solar systems are available, low voltage, high voltage ranging from 110vac to 480vac. Most of the components to Automatic Access System require low voltage to power them.

http://www.technologytimes.pk/mag/2011/jan11/issue04/golden_era.php