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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.
For example, when used on the rear service door of a business, a worker whose hands are being used to carry bulky items can lean against a bar to release the lock. While the public generally prefers automatic doors, they can be costly to install and maintain. [20] Some manufacturers offer crash bars designed to resist microbial growth.
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Another device for smaller domestic doors used a loop of rope or skein fixed to the door frame, that was twisted, with a piece of wood placed in between the twists to push the door. The opening of the door twists the skein further, when the door is released the rope's torsional force pushes the arm back against the door, thereby closing it. [5] [6]