×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Seat Belt Locking Mechanism
2

Seat Belt Locking Mechanism

Seat Belt Locking Mechanism

(OP)
I am designing a wirelocking(size of wire .125") system using the principle of seat belt locking mechanism in cars. The wire is run in to the pipe at a constant rate when it shears, the wire is lost. Hence the design. I was unable to find a reference of the seat belt mechanism in the net. Which would be the best possible source to find the working principle(with schematics).

RE: Seat Belt Locking Mechanism

US Office:

www.uspto.gov

RE: Seat Belt Locking Mechanism

flyingpig.com or howstuffworks.com

RE: Seat Belt Locking Mechanism

Not to be overly pragmatic, but go to your "Automotive recycling facility" and buy some retractors.  Take 'em apart and marvel at the cleverness.  There is a centrifugal element that reacts to how quickly the belt is being pulled from the internal spool, and there is also a pendulum device that locks the spool if the car's instantaneous gravitational vector gets very far from vertical( acceleration, rollover, etc.)

RE: Seat Belt Locking Mechanism

Make sure when you experiment with the structure of the seat belt
The spring is winded inside the belt that help in the winding of the belt.If you try to open the belt be cautious sometime the spring recoils out with great force.

Second thing, you can only pull out the belt from the assembly only if it place in the orientation that it is fixed inside the car.

I had a chance to replace the seat belt inside my car, when I observe these problems. Might be it will help you.

RE: Seat Belt Locking Mechanism

Why not use a principle similar to that in the wireline industry, oilfield technology?

When a wireline is attached to the Fish Neck of a Top Sub, it is simply threaded into a hole, like threading a needle.  A set of pawls located in slots then grab the wire.  As the wireline tension increases, the pawls grab the wire harder.  Thus you have a situation where resistance to slip is proportional to wireline tension.

I have used this mechanism extensively, most recently to grab a wire specimen for a Universeral Testing Machine.  We got a good stress/strain curve on the wire without slippage.  Most importantly, the wire broke at a location other than where the pawls had grabbed it.

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada

RE: Seat Belt Locking Mechanism

Patent sites are listed in the FAQ Patent Databases (FAQ404-887).

Best regards,

Matthew Ian Loew


Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

RE: Seat Belt Locking Mechanism

The simplest cable grabber is the splicer use to repair electrical distribution lines.  I don't know the name of it, but power company used tons of them after the hurricanes.  Al or Cu, it made no difference.

Tried to call the Power Company and couldn't get pass the press 1,2, or 3 crap.   

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources