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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.
In modern applications, automatic switches (such as contactors and relays) and manual switches such as circuit breakers are used. These devices use snap-action mechanisms which open the switch contacts rapidly and feature arc chutes where the arcs caused by opening the switches are quenched. These devices also prevent injury due to accidental ...
Electric eye for a garage door opener. An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam. The ...
A simple on-off switch. The two terminals are normally disconnected (open) and are closed when the switch is activated. An example is a pushbutton switch. SPST-NC Form B [4] Single pole, single throw, normally closed A simple on-off switch. The two terminals are normally connected together (closed) and are open when the switch is activated.
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Nissan offered the same door keypad technology on the 1984 Maxima, Fairlady, Gloria and Cedric, essentially using the same approach as Ford, with the addition of being able to roll the windows down and open the optional moonroof from outside the vehicle on the door handle installed keypad on both the driver's and front passengers door as well ...
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