westinghouse brake signal seen under London tube seat

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westinghouse brake signal london tube pounds pressure

westinghouse brake signal london tube pounds pressure2

I've seen this device under the London tubes which run via Liverpool Street station. These tubes are very old and are a bit worn out. I dont know what this device is but I spotted the following written on it:

westinghouse brake signal

pounds pressure per sq. inch

So, it may be some kind of pressure measuring device.

Visit London



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  1. Cris Page (trademale@yahoo.com)

    Its a brake cylinder pressure gauge the reading indicates brakes applied. Higest application pressure would be 55lbs PSI ((emergency appliocation). The old LT training was good... 24 years after I left the tube I still remember

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