Transposition Brackets

[NW Mailing List]

Gary Rolih, This is not about the Transportation Brackets but a question on 
the Peavine. Do you happen to have any photos of the Engine facility at 
Sardina Ohio. Located there was an elevated coal unloading track,a steam 
powered bucket ( Steam from the engine), Sand tower, Hostler's
Shanty.Also at Sardina were two water tanks, on the Hilsboro "Y', and the 
water teratment building.If you happen to have photos of such It would be 
very helpful in my completing  the area in HO. I have the Station completed. 
                 Thank You,
                                                                         Bob 
Stump , e-mail <clishay026 at hotmail.com>
                                                                         
Greenhills,Ohio &
                                                                         
Harlingen Tx



>From: NW Mailing List <nw-mailing-list at nwhs.org>

>Reply-To: NW Mailing List <nw-mailing-list at nwhs.org>

>To: "'NW Mailing List'" <nw-mailing-list at nwhs.org>

>Subject: RE: Transposition Brackets

>Date: Sun, 29 Jul 2007 19:06:07 -0400

>

>The bracket was a line cross-over using a frame and four insulator 'wheels'

>to cross over parallel signal lines.  Not up or down but side-to-side.

>These are still seen on older signal systems, such as the Peavine, but

>rarely now.

>

>The cross over works by, essentially, adding the electrical noise to the

>signal and at the next cross over subtracting the same.  Thus, it is a

>cancellation technique.

>

>The frame was mounted to the cross arm on the pole.

>

>Gary Rolih

>Cincinnati

>

>

>-----Original Message-----

>From: nw-mailing-list-bounces at nwhs.org

>[mailto:nw-mailing-list-bounces at nwhs.org] On Behalf Of NW Mailing List

>Sent: Sunday, July 29, 2007 4:19 PM

>To: NW Mailing List

>Subject: Re: Transposition Brackets

>

>I remember seeing an article in the N&W Magazine (probably in the 1950's)

>about the introduction of transposition brackets so that communication 

>lines

>

>could be placed on signal poles in order to eliminate separate 

>communication

>

>pole lines.

>

>Gordon Hamilton

>

>----- Original Message -----

>From: "NW Mailing List" <nw-mailing-list at nwhs.org>

>To: <nw-mailing-list at nwhs.org>

>Sent: Sunday, July 29, 2007 1:52 PM

>Subject: Transposition Brackets

>

>

> > In the days of the telegraph and telephone, both the ACL and the Norfolk

> > Southern had transposition brackets on the cross-arms of lineside

> > telegraph

> > and telephone lines.  If two wires stay parallel for a certain distance

> > they

> > have a tendency  to induce each other's signal. To prevent this

> > possibility

> > there are transposition brackets placed at strategic cross-arms. This

> > bracket has one insulator located above the cross-arm, and another

> > insulator positioned below the cross-arm to take the two wires

> > temporarily

> > out of being parallel for a short distance, thus preventing line 

>induction

> > between the two lines.  Did the N&W use these devices?   Or more to the

> > point,  are there any of them left on today's lineside cross-arms?  I 

>know

> > that they were used widely by AT&T and regional telephone companies.

> > Bill Sellers

> > Gainesville,Ga.

> >

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>

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