[PRCo] Re: Double--Point__RR__Turnouts-__-1940--1950

[Derrick J Brashear]

On Wed, 13 Dec 2006, Jim Holland wrote:

> R-E----S-E-N-D    ----    AGAIN!!!!!!!

I got 4 copies...

> -------- Original Message --------
> Subject: 	Re: Double--Point__RR__Turnouts-__-1940--1950
> Date: 	Wed, 13 Dec 2006 03:59:10 -0800
> From: 	Jim Holland <prcopcc at p-r-co.com>
> To: 	- 1714 PRCo__WP__JTC -
> <pittsburgh-railways%dementia.org at alycia.dementia.org>, - 1717
> PRCo__WP__JTC - <pittsburgh-railways at dementia.org>
> References: 	<20061212.174608.9049.1673194 at webmail01.lax.untd.com>
>
>
>
> Hi Mark!
>
>
> The  URLs  for the double point RR style turnout are still at the bottom
> of this email  --  ALL  rails, including the points, are rail height and
> slide across the top of the ties on tie plates  --  Both points move in
> tandem.
> .
> The  NEW  URL  below is an old one provided by Ed of construction of the
> Drake loop.       The point is several inches high and contained within
> a casting  --  the point moves to set the straight or diverge move and
> the point in this photo is on our left.       The Mate is an open ended
> casting with fill in the flangeway so that the wheel will ride through
> on its flange in part, especially when taking the diverge move and the
> wheel must pass over the straight flangeway gap.       How the wheel
> makes it through the mate is determined by the point on the other side.
>
> With double points the wheels on both sides of each axle do not have a
> gap to pass over.
>
> Jim___Holland
>
>
>
> Mark McGuire wrote:
> .
>
>> I'd really like for someone to explain the difference between double
>> point and point-mate so a novice as myself can understand. Perhaps a
>> photo of point-mate alongside a double point. Thanks! Very nice photo
>> of Tylerdale Jim! When was it taken?
>>
>> -- Jim Holland <prcopcc at p-r-co.com> wrote:
>> RE--SEND!!!!!!!
>> -------- Original Message --------
>> Subject: Re: Double--Point__RR__Turnouts-__-1940--1950
>> Date: Tue, 12 Dec 2006 13:43:55 -0800
>> From: Jim Holland <prcopcc at p-r-co.com>
>> To: - 1714 PRCo__WP__JTC -
>> <pittsburgh-railways%dementia.org at alycia.dementia.org>
>>
>>
>>
>> RE--SEND!!!!!!!
>>
>> -------- Original Message --------
>> Subject: Re: Double--Point__RR__Turnouts-__-1940--1950
>> Date: Tue, 12 Dec 2006 03:28:42 -0800
>> From: Jim Holland <prcopcc at p-r-co.com>
>> To: - 1714 PRCo__WP__JTC -
>> <pittsburgh-railways%dementia.org at alycia.dementia.org>
>> References: <DDEFKPCBMPHGBMKPEPNBEELJDPAA.trams2 at comcast.net>
>>
>>
>>
>>> -----Original Message-----
>>> From: Jim Holland
>>>
>>>
>>> This is a Trivia Question Only for those who Are Interested:
>>> .
>>> Where did PRCo use::
>>> .
>>> ..........Double--Point__RR__Turnouts-__-1940--1950??
>>> .
>>> A photo of one is enclosed.
>>> .
>>> .
>>> .
>>> JJ
>>
>>
>>
>>
>>> Edward H. Lybarger wrote:
>>> This could be the barn lead at Tylerdale, for example. (That's still
>> in service at PTM's Arden Loop.)
>> .
>> .
>> Actually, it is the closest turnout in the photo below!!!
>> .
>> .
>> hrbran99 at adelphia.net wrote:
>> .
>>
>>> I can remember one on the Overbrook single track at one of the
>>> sidings...... I would always ask older operators if they knew when
>>> and why this type of switch was installed. None of them could ever
>>> give a reason for the railroad type switch and none of them could
>>> recall when it was installed.
>>> --
>>> HrB
>>
>>
>> .
>> .
>> A-L-L the Overbrook siding turnouts were the RR dual point type. Only
>> two_(02) sidings existed on Overbrook until 1953, those 2 being Bon
>> Air curved siding and Smith/Reflectorville.     McKinley Park Siding
>> immediately south of the McKinley Park trestle and Edgebrook between
>> Bon Air and Reflectorville were added in 1953, A-L-L turnouts on these
>> new sidings were also RR dual point.
>> .
>> Sometime late in the Overbrook saga ({[pat]}) did replace one or more
>> of these RR points with the point and mate commonly used in streets.
>> .
>> .
>> Bob Dietrich wrote:
>> .
>>
>>> If I'm not mistaken Professor Holland you once pointed out to methat
>>> the turnouts just south of the Tunnel branching to Knoxville were
>>> double point.
>>
>>
>> .
>> .
>> Yes, this is very true. The outbound (southbound) one was converted to
>> point and mate probably when the tower operation of turnouts was
>> discontinued. It is a longer turnout and makes for a little difficulty
>> in using the point and mate but this type of point is less prone to
>> problems when electrified -- see below. The inbound one remained RR
>> style til the end.
>> .
>> .
>> Fred Schneider wrote:
>> .
>>
>>> It seems to me that most of the T-rail turnouts, except for a few
>>> instances where they reverted to single point castings, were double
>>> point. That includes any crossovers on routes 10-15, 62, 56,
>>> Washington, Charleroi, 42, 38-A,
>>
>>
>> .
>> .
>> This seems to be a good general statement. One major exception was
>> Washington Junction where both inbound and outbound were point and mate.
>> .
>> Where turnouts need to be electrified the point of point/mate would
>> have much less chance of clogging, especially in the winter. The
>> typical RR points had a much wider throw and garbage, snow, slush,
>> ice, etc. could jam the points. The motor used to power typical
>> mainline RR switches might draw significantly more amperage and be far
>> more problematic on TrolleyCar systems thus making the simple
>> point/mate much more efficient to use.
>> .
>> Here are some that I know of (and some I am unsure of in parenthesis)
>> but it would seem there were many more of them than one would realize
>> at first blush:::::::
>> .
>> .
>> .
>> 10/15 X-Overs West View Park
>> .
>> (23 Neville Island Sidings?)
>> .
>> (28 prw sidings?)
>> .
>> (29 Thornburg Siding?)
>> .
>> 32 X-Over Smithfield Bridge
>> .
>> MANY SouthEast South Hills Yard
>> .
>> Overbrook Sidings -- 10 turnouts, 2 at each siding and one on either end
>> to enter/exit the single track.
>> .
>> Some Castle Shannon Yard
>> .
>> Many/Most Charleroi and Washington Interurban Sidings
>> .
>> (Siding prw near Washington Park Jefferson/Maiden line?)
>> .
>> Tylerdale Car House and X-Over (photo enclosed)
>> .
>> W.Library loop enter and exit.
>> .
>> Northbound entry to South Hills Tunnel
>> .
>> 38A siding
>> .
>> 39 entry to single track OB exit single track IB
>> .
>> (40 single track near SHJ?)
>> .
>> 42 entry single track OB 42 to 38 - leave single track IB 38 to 42.
>> .
>> 44/48 outbound connection to Admin back track SHJ
>> .
>> 44/48 Loop Under prw near Warrington
>> .
>> 62 Trafford Sidings
>> .
>> 65 X-Over near Muldowney
>> .
>> (68 Kennywood Loop?)
>> .
>> .
>> .
>
>
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> http://lists.dementia.org/files/pittsburgh-railways/RR%20Double%20Point%20Turnout%20096.jpg
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> http://lists.dementia.org/files/pittsburgh-railways/03-Tylerdale%200096%20195xxxxx%20RSchramm.jpg
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> -- Attached file removed by Ecartis and put at URL below --
> -- Type: image/jpeg
> -- Size: 79k (80999 bytes)
> -- URL : http://lists.dementia.org/files/pittsburgh-railways/03-Track%20Drake%20Loop%20Construct%201953xxxx%2001.jpg
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