A special type of switch

Discussion in 'General Electronics Chat' started by szepj1, Feb 27, 2014.

  1. szepj1

    Thread Starter New Member

    Feb 27, 2014
    1
    0
    I'm wondering if this switch type that I desire exists. I'm aware of the type that's momentarily on; if pressure is applied the circuit is closed but once the pressure is removed or released the circuit is open.
    What I'm looking for is sort of, the opposite; if you pull on it, the switch or circuit becomes closed; release the pressure and it returns to a normal state of open.

    Does such a switch exist?
    :confused:
     
  2. w2aew

    Member

    Jan 3, 2012
    219
    64
    Sure they do. It's called a Normally Open Pull Switch. Here's an example:
    http://www.conrad.com/ce/en/product...Switch-Normally-open-1-pole-onoff-12-Vdc-10-A
     
  3. Electric Al

    Member

    Nov 6, 2013
    58
    8


    Possibly some kind of air switch ? Just Guessing !
     
  4. wayneh

    Expert

    Sep 9, 2010
    12,120
    3,046
    Pull on it? I can't recall seeing any switch that activates this way. Lightbulb pull chains are similar but I guess are not suitable.

    You could construct one, though, with a limit switch set to close when you pull on something. Take a look at "roller switches".

    Or better yet, just search for "momentary pull switch". Lots of choices.
     
  5. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,542
    2,369
    Is this for manual activation or other means? Sounds like a trip wire or tension fail, release switch?
    Any lever activated limit switch can be set up this way, it is N.O. held close (or NC held open).
    Max.
     
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