Locked in car park

[noomill060]

How have I managed to miss this thread???

[noomill060]

Forgive me, but has a hearing date been listed?

[noomill060]

yes

[noomill060]

A hydraulic system works by a fluid under pressure being forced along pipes into a cylinder. The expanding fluid in the cylinder forces a piston along the cylinder. There will be a rod attached to the piston, called a connecting rod or just "con rod".

 

This con rod will be connected to the barrier arm.

 

Pump (or possibly an electrically acuated lever, think "brake pedal" on your car sends high pressure fluid down pipes into cylinder- piston get forced out, the con rod lifts the barrier.

 

Just like the brakes in your car- you jump on brake pedal, the lever on the pedal compresses the brake fluid in the brake cylinder and the force is transmitted through the brake pipes to your brake slave cylinders pistons which get pushed out, expand the brake shoes an your car comes to stop.

 

Theres no gears or cogs in this system to damage.

[noomill060]

Years ago I had an MG Midget sports car which was so damn low you could drive right under these barrier arms!

[noomill060]

The RIB ones have a motor with a worm gear on the end which spins round and turns another gear which is attached to whatever it is that lifts/ lowers the barrier.

 

Its impossible to break the gears by lifting the barrier, the flimsy barrier would bend and crumple before you could exert enough force of the worm to damage it.

 

If any of you had a Hornby electric train set, remember how you couldnt push the engines round with out the power being on? The wheels were just locked sold. This is because they had a worm gear on the motor which meshed with a cog driving axle.

 

In other words the system only worked one way -from the motor to the wheels. The system cant work in reverse, but if the worm gear is already been terminally damaged, (and I mean worn out to the point that it no longer meshes with the gear wheel) in some way PRIOR to your attempting to get the mechanism to run backwards, of course you could push the thing around because the axles wouldnt be engaging with the worm.

 

I'll do vid of how worm gears work and put it on youtube....probably easier than trying to work out what Im trying say here!

[noomill060]

I think theres a FAAC one in the local mall car park. I go check it out tomorrow.

[noomill060]

The college.

[noomill060]

When? Soon?

 

Hope so!

[noomill060]

*Waves at guest*

[noomill060]

Heh heh!

 

Is wasting police time still, errrr....discouraged by the courts?

[noomill060]

Whats happening with the insurance fraud investgation? Is that still a runner?

[noomill060]

"I do know for fact that none of the parties involved 'lit up' at the last hearing so everyones in the clear there.....:grin::grin:"

 

Well thats a relief.

[noomill060]

Shocking that someone would waste the time of Plymouth's finest.

[noomill060]

At least the cop shop is convenient for Mr Dexter's job if he has to report there on a regular basis.

[noomill060]

Maybe the cop shop has CCTV of the college car park

[noomill060]

Typical- they're never around when you want one...

[noomill060]

This gets more bizarre everyday.

[noomill060]

*waves at guests*

 

[noomill060]

If you want to PM someone, just do it.

[noomill060]

indeed-

Edited August 11, 2009 by noomill060

[noomill060]

or an "incident", maybe?

[noomill060]

Someones gonna swing for this one- and it aint fred.

 

*waves at guests*

 

In the words of Marty McFly in Back to the Future-

 

"Better get used to those bars, kid"

[noomill060]

*waves at guest*

 

fun this, isnt it?

[noomill060]

Excellent news