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Chamberlain — the company's do-it-yourself line of garage door openers. LiftMaster — the company's line of garage door openers for professional installers. Raynor — the company's line of garage door openers for professional installers. This line of professional installers is slightly less common than LiftMaster.
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.
Remote controls send a digital code word to the receiver. If the receiver determines the codeword is acceptable, then the receiver will actuate the relay, unlock the door, or open the barrier. Simple remote control systems use a fixed code word; the code word that opens the gate today will also open the gate tomorrow.
Modern openers have “force settings” that make the door reverse if it encounters too much resistance while closing or opening. Any garage door opener sold in the United States after 1992 requires safety eyes—sensors that prevent the door from closing if obstructed. Force settings should cause a door to stop or reverse on encountering more ...
The idea behind the creation of the company was inspired by Mackay's first-ever skateboard, a small plastic cruiser that his father bought for him at a garage sale. Ben Mackay first started manufacturing and designing his own skateboards to sell to local skate shops. [5] [6] Mackay began experimenting with different shapes and types of boards ...
In 1974, Powell's son came and asked for a skateboard. When Powell pulled an old one out of the garage, his son complained it did not ride smoothly. Powell became interested in skateboarding again, as he realized urethane wheels improved a skateboard's ride. With this prompting, Powell started making his own skateboards and wheels.
A fingerboard is a scaled-down replica of a skateboard that a person "rides" with their fingers, rather than their feet. A fingerboard is typically 100 millimeters (3.9 in) long with width ranging from 26 to 55 mm (1.0 to 2.2 in), with graphics, trucks and plastic or ball-bearing wheels, like a skateboard. [1]
A skateboard is propelled by pushing with one foot while the other remains on the board, or by pumping in structures such as a pool or half-pipe. A skateboard can also be used by simply standing on the board while on a downward slope and allowing gravity to propel the board and rider.
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