Templot Club Archive 2007-2020                             

topic: 3721Wooden point motors
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posted: 21 Jul 2020 17:57

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Just doing some housekeeping on the Templot web site, and I came across this:

 http://templot.com/info/wooden_point_motors_1956.pdf

I have no recollection of ever seeing it before, or where it came from. :?

cheers,

Martin.


posted: 21 Jul 2020 21:20

from:

Bill_Lobb
 
Scarborough - United Kingdom

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Isn't that splendid? Wonder if it would work in 2FS.

Bill

Martin Wynne wrote:
Just doing some housekeeping on the Templot web site, and I came across this:

 http://templot.com/info/wooden_point_motors_1956.pdf

I have no recollection of ever seeing it before, or where it came from. :?

cheers,

Martin.



posted: 21 Jul 2020 22:59

from:

John Lewis
 
Croydon - United Kingdom

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My guess is that It might have come from Model Raiway News in the 1940s or 1960s.

posted: 21 Jul 2020 23:20

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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John Lewis wrote:
My guess is that It might have come from Model Raiway News in the 1940s or 1960s.
Hi John,

The file name says 1956. :)

The greater mystery is how it came to be on the Templot web site without my having the faintest recollection of it? The file upload date is 2012, so there is no chance of me remembering now. :?

Martin.

posted: 22 Jul 2020 06:34

from:

Hayfield
 
United Kingdom

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Reminds me of the DIY articles in all three mags of that era, using either discarded (food mainly) packaging, matchsticks and balsa wood. Was it Railway Modeler that had the "Shows you how" series. Paper Mache and chicken wire featured heavily, with card of off cuts of wood formers

posted: 22 Jul 2020 09:22

from:

John Shelley
 
St Ciers Sur Gironde 33820 - France

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Martin Wynne wrote:
John Lewis wrote:
My guess is that It might have come from Model Raiway News in the 1940s or 1960s.
Hi John,

The file name says 1956. :)

The greater mystery is how it came to be on the Templot web site without my having the faintest recollection of it? The file upload date is 2012, so there is no chance of me remembering now. :?

Martin.
[edited message]
To me the style says Railway Modeller, also top right of first page is the word Railway.
A look in my Railway library located the May 1956 Railway Modeller with that article on pages 116 & 117.
The number 67 top left  of the first page is the issue number of that Railway Modeller (Vol 7 No.67).

John S from 33820 St Ciers sur Gironde.

posted: 22 Jul 2020 14:02

from:

Nigel Brown
 
 

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The author of the article, Sir Eric Hutchison, was a well known modeller of the era and a co-founder of Merco. He wrote quite a few articles for the Railway Modeller, including one of his superb layout based on the Highland Railway main line from Blair Atholl north; it really captured the atmosphere of the line. There's a bio of him here:
http://www.brightontoymuseum.co.uk/index/Category:Sir_Eric_Hutchison

posted: 25 Jul 2020 05:59

from:

Andrew Barrowman
 
USA

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Martin Wynne wrote:
Just doing some housekeeping on the Templot web site, and I came across this:

 http://templot.com/info/wooden_point_motors_1956.pdf

I have no recollection of ever seeing it before, or where it came from. :?

cheers,

Martin.
Hi Martin,
I don't remember seeing it in RM but I don't think I started reading that until 1959. (I was amazed to see it in a news agent's window.)

Incidentally, I may be missing something but I don't think it works, at least not for the reasons that the author seemed to think. The two sides are always going to be balanced or more likely not, in which case a single weight is all that's required.

What would work I think is if the action of moving the lever elevated a single weight so that it acted like an over-centre spring. I've always imagined full-scale point levers work that way. I've thought of trying  it on a model myself but I've yet to get around to it. Maybe on the new layout?

Cheers,
Andy

posted: 25 Jul 2020 06:58

from:

Igor Kurgan
 
Netherlands

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I tend to agree with Andy.
It is a very interesting design worth to build soon.
Indeed a spring is missing(or a locking mechanism), a old fashion clock work can work also without a spring.

Best Igor

posted: 25 Jul 2020 08:49

from:

Hayfield
 
United Kingdom

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Whilst both weights are the same weight, owing to the pivot point being well off center the force of C will be greater than D. It also suggests adding extra weight if required

posted: 25 Jul 2020 09:16

from:

Andrew Barrowman
 
USA

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Hayfield wrote:
Whilst both weights are the same weight, owing to the pivot point being well off center the force of C will be greater than D.
Hi John,

I completely agree. But if all you want to do is exert a force, why do you need two weights when you can achieve exactly the same result with one?

It's a "net effect" thing. My old physics teacher in Paisley (who we irreverently nick-named "Bilko" due to his receding hairline) would have had a field day with this one :D

Cheers,
Andy

posted: 25 Jul 2020 09:55

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Andrew Barrowman wrote:
I completely agree. But if all you want to do is exert a force, why do you need two weights when you can achieve exactly the same result with one?
Hi Andy,

I'm not sure you can. If you use tension in the operating cord to pull the points over against a single falling weight return, the points aren't trailable when so held over. And it needs some very careful adjustment to the operating cord to hold them against the stock rail with the right amount of force.

The beauty of this design is that you can use any old bit of string to lift the weight from the operating crank. The points are held either way by the weights only, and are trailable both ways.

cheers,

Martin.

posted: 25 Jul 2020 18:12

from:

Andrew Barrowman
 
USA

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Martin Wynne wrote:
Andrew Barrowman wrote:
I completely agree. But if all you want to do is exert a force, why do you need two weights when you can achieve exactly the same result with one?
Hi Andy,

I'm not sure you can. If you use tension in the operating cord to pull the points over against a single falling weight return, the points aren't trailable when so held over. And it needs some very careful adjustment to the operating cord to hold them against the stock rail with the right amount of force.

The beauty of this design is that you can use any old bit of string to lift the weight from the operating crank. The points are held either way by the weights only, and are trailable both ways.

cheers,

Martin.
Hi Martin,

In the cold light of day I now see where I was going wrong :)

I thought the cord was was attached to the tie-bar and the thing sticking up above the fulcrum was the point lever. Doh!

Cheers,
Andy



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