[PRCo] Re: Railroad crossings

[Jim Holland]

Good Morning!

> Matt Barry wrote:

> I believe it was simply like an oval wire fence, if you
> will, to keep the trolley pole from going off the wire
> as it crossed the railroad tracks.


	In fact, this  *fence*  was  *live*  to keep the trolleycar
supplied with power in the event it did dewire  *and*  remained
within the fence!

	If it went outside the fence it would still scrape against same
and poles were live so it would still get power but bounce at
each span wire as long as the crossing was tangent.    But at the
mentioned photo in Carnegie, the trolleycar tracks cross on a
curve and it is possible for the pole to bounce outside the guard
to the outside of the curve where it would not touch the guard!

	If Derrick's software performs, the enclosed scan will result in
an URL in the post and it reveals the trolleycoach installation
of the trolley guard.


>> Boris Cefer wrote:
 
>> Hello, folks!

>> I have noted, that PRCo used some protective device
>> mounted closely above the trolley wire at points where
>> the trolley tracks crossed railroad.    Was e.g. at
>> crossing with PRR Panhandle Div. on Main St. in Carnegy,
>> clearly visible in PCC From Coast To Coast, page 170.
>> Does anybody know what was that wire roof for?    Seems
>> it could provide an emergency power supply in case
>> of dewirement to prevent the streetcar stay on
>> railroad track.

>> Boris


<><><><><><><><><><><><><><><><><><><><>

Waiting for a bus is as thrilling as fishing,
    with the similar tantalisation that something,
        sometime, somehow, will turn up. 
            George Courtauld

<><><><><><><><><><><><><><><><><><><><>

James B. Holland

• Holland  Electric  Railway  Operation....... 
  "O"--Scale St.-Petersburg Trams Company (SPTC)
	Trolleycars and "O"--Scale  Parts
		including Q-Car
	mailto:pghpcc at pacbell.net

• Pennsylvania Trolley Museum
	http://www.pa-trolley.org/
• Pittsburgh  Railways  Company  (PRCo),
	1930  --  1950
• N.M.R.A.  Life member #2190;
	http://www.nmra.org

<><><><><><><><><><><><><><><><><><><><>

-- Attached file removed by Ecartis and put at URL below --
-- Type: image/jpeg
-- Size: 255k (262091 bytes)
-- URL : http://lists.dementia.org/files/pittsburgh-railways/wire_guard_TC.jpg