Cab Signals on N&W FM Trainmasters at Lamberts Point?

[nw-mailing-list at nwhs.org]

I realize that my description of the N & W cab signals, done late at night, was not very clear. I mentioned "three heads," but a conventional signal head can display as many as three aspects.  On the N & W cab signal boxes, the three aspects were separate.  I forget which was at the top, but let's say it was the stop indication.  Its aspect would have been three lights in a horizontal row.  Below it would be three lights in a diagonal row (indication "Approach"), and on the bottom would be three lights in a vertical row (indication "Proceed").  Only one aspect would have been displayed at a time, depending on the code received from the track.

I hope that this clear up things a bit.

Gordon Hamilton
  ----- Original Message ----- 
  From: nw-mailing-list at nwhs.org 
  To: NW Mailing List 
  Sent: Sunday, February 12, 2006 12:04 AM
  Subject: Re: Cab Signals on N&W FM Trainmasters at Lamberts Point?


  Abram,

  When I first went to work at the Shaffers Crossing roundhouse in 1956, I remember seeing the cab signals in certain N & W steam locomotives.  They were three-head, position-light signals.

  I have no idea whether any survived.

  Gordon Hamilton
    ----- Original Message ----- 
    From: nw-mailing-list at nwhs.org 
    To: NW Mailing List 
    Sent: Tuesday, February 07, 2006 9:42 PM
    Subject: Re: Cab Signals on N&W FM Trainmasters at Lamberts Point?


    Someone wants a pix of the cab signal that was on the N&W FM engine.  Here it is as a composite image.

    Bottom left image shows the cab signal with front attached, displaying green.  Bottom right image shows the cab signal with front removed, showing that there is nothing inside except lamp bases.

    The top image shows it with some cab signals from other roads, to give an idea of its size. Between the bottom left cab signal (Reading) and the bottom center cab signal (CNJ) can be seen the top of a US&S 1900 ohm model P-4 code following relay.  The P-4 is used to follow the 180, 120 or 75 code which changes the cab signals to their various aspects, through resonant transformers and code selective relays.  Pardon the allegator clips... they'll be replaced with hard wiring some day when "the signal forces" have time.

    I have only seen a very few photos of N&W steam with cab signals mounted.  This one looks exactly like the ones used in steam days.  I doubt, however, that this one was taken from an N&W steam engine.  This style cab signal was probably a catalogue item from the Union Switch & Signal Co. for decades, and was probably sold by the hundreds, if not thousands.  When the N&W needed cab signals for their FM Trainmasters, they probably just bought the same equipment they had bought for their application on steam.  My guess.

    Wonder if any N&W cab signals from steam engines survive in captivity?

    -- adb




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