Letters on inside of tube carriages

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causton

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Why are there letters above the windows on the inside of tube carriages? I have found them on the inside of Jubilee line stock in the centre of the panel between the windows and the advert panels with acronyms like PCOS. Any explanation?
 
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bengley

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They are linked with equipment under either that seat or the adjacent panel on the floor.

It's just to let the driver/maintenance staff know what is there.

Example: NSLG is negative shoe lifting gear.
 

Tubeman

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...And look out for the little star on the ceiling, that indicates the floor hatch for lifting Negative shoes.

They vary from stock to stock, I could probably still recall every single 1959 Stock acronym as these were drummed into us parrot fashion in the olden days of 'going up for Motors'. I ought to know all the C and D stock ones too.

Those ending in '-COS' = 'Cut out switch'

e.g. ComCOS = Compressor cut out switch
TCOS = Traction cut out switch

'-IC' = 'Isolating cock'

e.g. MLIC = Mainline isolating cock
DIC = Door isolating cock

Others off the top of my head: BRV = Brake release valve, EL = Emergency ladder, IS = Ice scraper
 

DavyCrocket

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Then there's doors.
M from cab to track (middle door)
N nearside cab door
O offside cab door
J cab to saloon door

R and S car communicating doors

Then the passenger door leaves have letters too.
(there might well be more letters)


I'm 99% sure that star is to do with brakes (release?), it's been donkeys since I've done a stock course!
 
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