In trains when chain is pulled how the train is stopping?

Question

how the train is stopped by pulling chain

Answer 1

The brakes on 95% of trains operating in the USA are operated by air. The chain you are referring to is connected to a air valve when the chain is pulled the valve is opened causing a reduction in the brake pipe pressure and this action put the train into and emergency application. During an emergency application all the brakes on the cars and locomotive are applied and this stops the train.

Answer 2

pulling of a chain sounds like it may be some sort of an older passenger train type deal, sounds like you're talking about an emergency brake application, you have some okay explanations but to keep it simple -- passenger trains in the us operate with 90 lbs. of pressure throughtout all of the cars, or should unless something is wrong with one of the cars, as long as you have 90 lbs. in the brake pipe the cars move along freely, but when some of that brake pipe pressure is released, a brake application takes place, depending on how much pressure is released the train stop gradually or it stops immediately (keep in mind that because of the momentum and weight of the cars, no train stops immediately, technically)  --- when an emergency brake application occurs all the air pressure is released and all the brakes apply causing the train to slide to a stop --

Answer 3

I think you are referring to the hand brakes on cars and locomotives.  there is a wheel, or lever that operates a drum which the chain feeds through  and it goes to the brake rigging to tighten one of the brake shoes against a wheel.  When  stopped we always set a few brakes to tie a train down as well as the brake on the locomotive.

Don't confuse this with the airbrakes, or the dynamics.

I don't think hand brakes can stop a moving train if it is moving at any speed at all.  But you can slow or stop a single car when it is kicked by tightening the brake.   I always wanted to do that.

Answer 4

I presume you mean the emergency chain?

Most trains have air brakes so a compressor pressurises the brake cylinders to release the brakes (not to apply them), when the chain is pulled a valve is opened and air escapes allowing either a powerfull spring or a reserve air supply to apply the brakes.  This system is used to prevent the train losing braking power if the air system fails.  The train driver has a more controllable valve for normal operation of the brakes.

Answer 5

The chain is connected to the brakes, and when you pull it, the train stops..

Hope that help;-)