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-   -   Brass Gong (https://www.tractiontalkforum.com/showthread.php?t=33647)

8_10 Brass Cleaner 14th January 2015 03:34 PM
Quote:
Originally Posted by clayton21 (Post 324901)
Gentlemen & Ladies,

What is the bell needed or - I can see the parallel with a bicycle but surely your average steam tractor makes too much noise for such a bell to be heard / used as a warning (and you've got a whistle for that anyway) .....
Andrew,

At the time of manufacture a whistle was not a legal form of audible warning. Consequently bells were often original fitment.

According to the erection sheet of my Marshall it was fitted with one. As I understand was the case with Chris's Foster. Very often a whistle was not fitted. There is no record of a whistle being fitted to my Marshall when manufactured.

I find that road users take no notice of whistles, probably because of historical frivolous use.

8_10 Brass Cleaner 14th January 2015 03:40 PM
Quote:
Originally Posted by D-valve (Post 324899)
If you don't mind the cost, new longcase clock bells are available in various sizes from horological parts suppliers, they come in various sizes in the correct metal with a nice ring to them.

They can sometimes be purchased quite cheaply in salerooms on old movements.

http://www.m-p.co.uk/muk/parts/chap0...0280043815.htm

http://www.m-p.co.uk/muk/parts/chap0...0280051215.htm
john

Brilliant

http://www.m-p.co.uk/muk/acrobat/cat41e/mp41e-s-c3.pdf

Strikes me the 120mm cast 'Comtoise' is almost perfect.

http://www.m-p.co.uk/muk/parts/chap0...1098012015.htm

Lancashire Lad 14th January 2015 04:45 PM
Quote:
Originally Posted by 8_10 Brass Cleaner (Post 324894)
No just going to do the bell. it is 126mm OD diameter if that helps to confirm if your guts would suit.

I do not want to dismantle mine, but I see no reason to, everything is simply made out of flat stock except the striker, and I could carve one of them out of solid with an angle grinder if I had too, so have no doubt Chris could.
I'll dig it out the car later tonight and have a trial assembly etc see how it all fits up etc.

weidner 14th January 2015 05:03 PM
If anyone is ever going to the trouble of casting a gong , then it would be worth going to a bell foundry . Whitechapel still cast and finish hand bells , and I seem to remember that they have patterns for gongs , which would be cast similarly . Bell metal , which is 22% tin , rings better than anything else ( even better than Fowler gears ) I would bet that Whitechapel's gong patterns are imperial . They would tune it too if you wanted .

1882 14th January 2015 06:28 PM
Quote:
Originally Posted by Lancashire Lad (Post 324912)
I'll dig it out the car later tonight and have a trial assembly etc see how it all fits up etc.
Send me a picture of all the other bits please

Snail Trail 15th January 2015 03:03 PM
Quote:
Originally Posted by weidner (Post 324914)
If anyone is ever going to the trouble of casting a gong , then it would be worth going to a bell foundry . Whitechapel still cast and finish hand bells , and I seem to remember that they have patterns for gongs , which would be cast similarly . Bell metal , which is 22% tin , rings better than anything else ( even better than Fowler gears ) I would bet that Whitechapel's gong patterns are imperial . They would tune it too if you wanted .
Our local foundry is a very good old school firm. When we had ours coppied for the Aveling he recast the bell twice until he was happy with the ring ( much to the annoyance of Basil!!)

Burrell8 15th January 2015 03:46 PM
1 Attachment(s)
I have converted Hedd's drawings in to CAD and will send them to him, here is a PDF of the CAD, quite nice shapes for just an' ol' clanger!

Lancashire Lad 15th January 2015 03:57 PM
Quote:
Originally Posted by weidner (Post 324914)
If anyone is ever going to the trouble of casting a gong , then it would be worth going to a bell foundry . Whitechapel still cast and finish hand bells , and I seem to remember that they have patterns for gongs , which would be cast similarly . Bell metal , which is 22% tin , rings better than anything else ( even better than Fowler gears ) I would bet that Whitechapel's gong patterns are imperial . They would tune it too if you wanted .
Surely it would make more sense for me to go visit John Taylor & Co?

8_10 Brass Cleaner 15th January 2015 04:07 PM
Nah. Pay £25 for the one D valve found.

weidner 15th January 2015 04:12 PM
Quote:
Originally Posted by Snail Trail (Post 324998)
Our local foundry is a very good old school firm. When we had ours coppied for the Aveling he recast the bell twice until he was happy with the ring ( much to the annoyance of Basil!!)
Old school ? When I was at Whitechapel we still had to pick the beans out of the horse shit before we mixed it with the clay and the cow hair . I will admit that we cast the hand bells and gongs in that new fangled sand stuff . Taylors at loughborough are mere upstarts , Whitechapel go back to Queen Elizabeth's time , so must be the oldest foundry in the country .


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