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2. Garage door opener - Wikipedia

   en.wikipedia.org/wiki/Garage_door_opener

   A residential garage door opener. The motor is in the box on the upper-right. A garage door opener is a motorized device that opens and closes a garage door controlled by switches on the garage wall. Most also include a handheld radio remote control carried by the owner, which can be used to open and close the door from a short distance.

3. Garage door - Wikipedia

   en.wikipedia.org/wiki/Garage_door

   A garage door is a large door to allow egress for a garage that opens either manually or by an electric motor (a garage door opener). Garage doors are frequently large enough to accommodate automobiles and other vehicles. The operating mechanism is usually spring-loaded or counterbalanced to offset the door's weight and reduce the human or ...

4. Chamberlain Group - Wikipedia

   en.wikipedia.org/wiki/Chamberlain_Group

   Chamberlain Group (CGI), the corporate parent company to LiftMaster, Chamberlain, Merlin, and Grifco, designs and engineers residential garage door openers, commercial door operators, security cameras, and gate entry systems. CGI is also the parent company to Controlled Products Systems Group, the largest wholesale distributor of perimeter ...

5. The Genie Company - Wikipedia

   en.wikipedia.org/wiki/The_Genie_Company

   Website. www.geniecompany.com. GMI Holdings Inc. (dba The Genie Company) is an American manufacturer of garage door openers & related accessories. It was founded in 1923 as the Alliance Manufacturing Company, located in Alliance, Ohio. At the time the company produced a broad line of consumer, industrial and military products. [2]

6. Door closer - Wikipedia

   en.wikipedia.org/wiki/Door_closer

   A door closer is a mechanical device that regulates the speed and action of a door ’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. Door closers can be linked to a building's fire and security alarm systems.

7. Limit switch - Wikipedia

   en.wikipedia.org/wiki/Limit_switch

   A set of adjustable limit switches installed on a garage door opener shut off the motor when the door has reached the fully raised or fully lowered position. A numerical control machine such as a lathe has limit switches to identify maximum limits for machine parts or to provide a known reference point for incremental motions.