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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.
Z-Wave is a wireless communications protocol used primarily for residential and commercial building automation. It is a mesh network using low-energy radio waves to communicate from device to device, [2] allowing for wireless control of smart home devices, such as smart lights, security systems, thermostats, sensors, smart door locks, and garage door openers.
A remote keyless system can include both remote keyless entry (RKE), which unlocks the doors, and remote keyless ignition (RKI), which starts the engine. Numerous manufacturers have offered entry systems that use door- or pillar-mounted keypad entry systems ; touchless passive entry / smart key systems that allow a key to remain pocketed; and ...
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.
This makes the unit ideal cosmetically and also allows for up to 180 degrees of leaf swing as required. However controlling the pivot point of the gate, is like opening a door by twisting the hinge, and as so is very difficult due to the loads needed at that point. This is highlighted with snap, as the gate has to change direct, as soon as it can.
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The weight of the door may be 400 lb (180 kg) or more but is balanced by either a torsion spring system or a pair of extension springs. [2] A garage door opener is controlled motorized mechanism for opening garage doors adds convenience, safety, and security often used with a remote or a button on wall. [3]
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