motorised gates

posted by .

Try this website:
http://www.howstuffworks.com/

Try different search terms until you find what you're looking for.

=)

how do they work ?

A trick many employ to open and close gates: they use an endless helical drive screw, so the motor turns the screw only one way. It has limit switches on each end to shut off motor.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. computer

    How to be a expert in programming in c language These sites show how to learn programming in the C language. http://www.howstuffworks.com/c.htm http://www.cprogramming.com/tutorial.html
  2. english

    I am having trouble with two words. Match the words to their definition. Recalcitrant Defiant A. Rebellious B. Extremely disobedient to the point of rebellion Thank you for using the Jiskha Homework Help Forum. When you find a word …
  3. Current Events

    Where would be a good place to find a current event article that I can follow from now til about Dec.?
  4. english

    To what extents did Tolkien borrow characters,events and objects that are found in the book,"The Hobbit" from the pervious literature,"Scandinavia" I have not read either of these works, but if you go to http://www.google.com and enter …
  5. P.E.

    I need to type an esay on my favorite athelete unfoetunately I don't have a favorite athelete can you show me famous atheletes What sport do you enjoy?
  6. English

    i need to define bandwagon,glittering generality, image advertising, name calling, etc and this web site but i don't know were to look for There are many websites you can try. Be sure to try more than one website for each term. http://www.answers.com …
  7. Writing

    Where Can i find some short current event articles?
  8. Science

    How do you descirbe how gas exchange in the air sacs?
  9. Science

    A battery operated flashlight is turned on. What energy transformations take place and how does the amount of energy in the batteries compare to the total amount of light given?
  10. physics

    how does a vcr work through electromagnetism?

More Similar Questions