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2. Light switch - Wikipedia

   en.wikipedia.org/wiki/Light_switch

   An example of a British corded pull switch. A light switch combined with a light socket is sometimes installed in basement or utility areas of homes. The switch is operated by a pull chain or cord. It is also possible to have the cord-operated switch separate from the light socket, which is particularly common in British bathrooms.

3. Output signal switching device - Wikipedia

   en.wikipedia.org/wiki/Output_Signal_Switching_Device

   An output signal switching device (OSSD) is an electronic device used as part of the safety system of a machine. It provides a coded signal which, when interrupted due to a safety event, signals the machine to shut down. It works by converting the standard direct current supply, usually 24 volts, into two pulsed and out-of-phase signals.

4. Motion detector - Wikipedia

   en.wikipedia.org/wiki/Motion_detector

   A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.

5. Security lighting - Wikipedia

   en.wikipedia.org/wiki/Security_lighting

   Security lighting to prevent intrusions may be counter-productive. Turning off lights halved the number of thefts and burglary in Övertorneå Sweden. [2] [3] A test in West Sussex UK showed that adding all-night lighting in some areas made people there feel safer, although crime rates increased 55% in those areas compared to control areas and to the county as a whole.

6. Childproofing - Wikipedia

   en.wikipedia.org/wiki/Childproofing

   A plastic electrical outlet cover. One of the more common concerns of child safety is the potential for electrocution or serious injury when an object, such as a key or metal paper clip, is inserted into an electrical outlet. Many childproofing devices exist that block access to the electrical outlets.

7. Child safety lock - Wikipedia

   en.wikipedia.org/wiki/Child_safety_lock

   The lock is typically engaged via a small switch on the edge of the door that is only accessible when the door is open. Some cars [4] implement the child lock control as a rotary mechanism which can only be operated with a key. This design ensures the child lock remains in position, preventing passengers from changing the lock position when the ...