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triparm

Discussion relating to the past and present operations of the NYC Subway, PATH, and Staten Island Railway (SIRT).

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triparm

  by rail10
 
what type of triparms are used for controlling nyc subway cars and who are the makers of them?

Re: triparm

  by Phil Hom
 
rail10 wrote:what type of triparms are used for controlling nyc subway cars and who are the makers of them?
See the link below:
http://www.nycsubway.org/tech/signals/stops.html

Whoever the signal came from is the maker of the triparm (Union, GRS, etc).

How many are you planning to buy?

  by KLCS
 
The older triparms are pneumatic and the newer ones are electrically-mechanically controlled.
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