[PRCo] Re: 1019

[Phillip Clark Campbell]

Interlocking is set through track circuits as a rule aren't they and there are several clues to this.  Both the Inbound and the outbound cars do not have overhead contactors for clearing the interlocking  (overhead contactors are in place inbound for resetting the derails only as the vehicles have not cleared the junction itself)  and if you look closely at some of the pictures you can see insulated rail joints.  An inbound interurban could prevent an outbound car from crossing in front of it and the signal for the outbound cars would be red until point is set for straight through direction giving a proceed for that direction.  What happens at the first contactor won't affect the interlocking until the point is set.


Phil




----- Original Message ----
From: Jim Holland <PRCoPCC at P-R-Co.com>
To: - 1714 PRCo__WP__JTC - <pittsburgh-railways at lists.dementia.org>
Sent: Saturday, October 20, 2007 5:20:27 PM
Subject: [PRCo] 1019

Whether the first contactor also set priority for interlocking at this location or whether that was strictly track operated circuitry is unknown to me At This Time.
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^~^~^~^~^~^~^~^~^~^
Jim  Holland
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Studying Pittsburgh Railways Company (PRCo)
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..............................From 1930 -- 1950
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Pennsylvania  Trolley  Museum  (PTM)
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http://www.pa-trolley.org/
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N.M.R.A.
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http://www.nmra.org/

 http://lists.dementia.org/files/pittsburgh-railways/1019%2086%20Xpress%20Via%20Subway%20OB%20SHJ%2019590514%20unk.jpg







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