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  2. Garage door opener - Wikipedia

    en.wikipedia.org/wiki/Garage_door_opener

    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.

  3. Garage door - Wikipedia

    en.wikipedia.org/wiki/Garage_door

    Sectional garage door Up-and-over garage door Garage Door Hardware. 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 ...

  4. List of screw drives - Wikipedia

    en.wikipedia.org/wiki/List_of_screw_drives

    The Phillips/square screw drive, also known as the Quadrex, Pozisquare screw drive, is a combination of the Phillips and Robertson screw drives. While a standard Phillips or Robertson tool can be used, there is also a dedicated tool for it that increases the surface area between the tool and the fastener so it can handle more torque.

  5. Cam out - Wikipedia

    en.wikipedia.org/wiki/Cam_out

    Cam out (also cam-out or camming out) is a process by which a screwdriver slips out of the head of a screw being driven once the torque required to turn the screw exceeds a certain amount. [1] Repeatedly camming out damages the screw, and possibly also the screwdriver, and should normally be avoided.

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  7. Diagnostic program - Wikipedia

    en.wikipedia.org/wiki/Diagnostic_program

    Everyday examples are a microwave oven that displays code F6 to warn of a shorted temperature probe [1] or a garage door opener that flashes its control board's LED four times warning of critically misaligned safety sensors and impending shutdown. [2] Diagnostic programs are also inserted into consumer electronic products and electronic games.

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