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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. List of Wheeler Dealers episodes - Wikipedia

   en.wikipedia.org/wiki/List_of_Wheeler_Dealers...

   Work Completed: Replaced gear knob, passenger door and door mirrors, pulled and filled dent in rear nearside quarter panel, repainted wheels and replaced the centre caps, applied new door sill decals, replaced handbrake lever, replaced handbrake warning light, adjusted rear exhaust section to prevent it from knocking against the undercarriage, fitted a new stereo, engine service including ...

4. Digital model railway control systems - Wikipedia

   en.wikipedia.org/wiki/Digital_model_railway...

   DWiC does not use any model rail specific items such as command stations and boosters and so is much lower in cost. This technology is also useful outside the model rail world as a DWiC controller could open a garage door or remotely turn on sprinklers. The web server/controller is similar to a DCC decoder in hardware and cost.

5. Radio - Wikipedia

   en.wikipedia.org/wiki/Radio

   Garage door opener – a short-range handheld transmitter which can open or close a building's electrically operated garage door from outside, so the owner can open the door upon arrival, and close it after departure. When a button is pressed the control transmits a coded FSK radio signal to a receiver in the opener, raising or lowering the ...

6. Switch - Wikipedia

   en.wikipedia.org/wiki/Switch

   An example of a push-to-break switch is a button used to release a door held closed by an electromagnet. The interior lamp of a household refrigerator is controlled by a switch that is held open when the door is closed.

7. List of EN standards - Wikipedia

   en.wikipedia.org/wiki/List_of_EN_standards

   EN 13231: Railway applications - Track - Acceptance of works EN 13231-1: Part 1: Works on ballasted track - Plain line, switches and crossings; EN 13231-2: Part 2: Acceptance of reprofiling rails in plain line, switches, crossings, and expansion devices; EN 13231-3: withdrawn, replaced by EN 13231-2; EN 13231-4: withdrawn, replaced by EN 13231-2