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  2. ÖBB Class 4020 - Wikipedia

    en.wikipedia.org/wiki/ÖBB_Class_4020

    The ÖBB class 4020 of the Austrian Federal Railways (ÖBB) are electric commuter railcars developed by Simmering-Graz-Pauker. In the narrower sense, 4020 is the designation of the railcars, the control cars are referred to as series 6020 and the intermediate cars as series 7020.

  3. Sabbath mode - Wikipedia

    en.wikipedia.org/wiki/Sabbath_mode

    Sabbath mode, also known as Shabbos mode (Ashkenazi pronunciation) or Shabbat mode, is a feature in many modern home appliances, including ovens, [1] dishwashers, [2] and refrigerators, [3] which is intended to allow the appliances to be used (subject to various constraints) by Shabbat-observant Jews on the Shabbat and Jewish holidays.

  4. Electromagnetic lock - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_lock

    Electromagnetic lock. This article is about a mechanism to hold a door closed. For the mechanism to hold a door open, see Electromagnetic door holder. For a lock utilizing magnetism and a key, see Magnetic keyed lock. An electromagnetic lock, magnetic lock, or maglock is a locking device that consists of an electromagnet and an armature plate.

  5. Electronic lock - Wikipedia

    en.wikipedia.org/wiki/Electronic_lock

    A quick demonstration of an electronic door lock. An electronic lock (or electric lock) is a locking device which operates by means of electric current. Electric locks are sometimes stand-alone with an electronic control assembly mounted directly to the lock. Electric locks may be connected to an access control system, the advantages of which ...

  6. Door handle - Wikipedia

    en.wikipedia.org/wiki/Door_handle

    A door handle or doorknob is a handle used to open or close a door. Door handles can be found on all types of doors including exterior doors of residential and commercial buildings, internal doors, cupboard doors and vehicle doors. There are many designs of door handle, depending on the appropriate use. A large number of handles, particularly ...

  7. Reed switch - Wikipedia

    en.wikipedia.org/wiki/Reed_switch

    Reed switch. (from top) Single-pole reed switch, four-pole reed switch and single-pole reed relay. Scale in centimeters. Reed switch, contact detail. Commonly-used circuit symbol. Operation of the reed switch. The reed switch[i] is an electromechanical switch operated by an applied magnetic field. It was invented in 1922 by professor Valentin ...