denis M
Part of the e-furniture
Posts: 300
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Post by denis M on Nov 18, 2015 23:36:43 GMT
Hi all,
I am trying to find where I can get hold of toughened, 2mm glass, ideally cut to size, for some gauge glass protectors and cab windows, as usual do not need a lot.
Anyone any idea's.
Denis
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Post by Deleted on Nov 19, 2015 8:30:26 GMT
Hi Denis
In a past life I was buyer on the film 'Batman Begins' responsible for the budget of all materials, involved with the company 'Cutting Edge' making the miniature models/sets. Anyway one such set was the 3rd scale monorail that ran through Gotham city, for those who may have seen the film this was were the villain Liam Neeson met his end in the big train crash. The train required all of it's glazing to be toughened glass which was a lot of glass, not for safety but because on impact it would break up in a scale like manner, no big shards giving the game away. Now this is over 10 years ago now so can't say if the company still exists but since I still have my 'Buyers Book' I can give you the details of where I sourced the glass back then.
Fine Glass ( ex Henham's glass) Unit 6 Park Rd Great Chesterfield Essex CB10 1RN Tel: 01799 530655 Fax: 01799 531752
contacts were one of three although as i say it was a long time ago now, they were Les, Steve and Tom
The alternative I see from others is the microscope glass plates, i'm not sure what these are made off nor their thickness, may be better scale wise on most locomotives 2mm being a little thick...mind you Gresley retro fitted armoured glass due to a serious accident in his pacific's iirc 3/4" thick...still not to scale at 2mm but close enough perhaps.
good luck and please report back if they are still in business...cheers
Pete
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Post by ejparrott on Nov 19, 2015 9:17:11 GMT
I must meet up with you for a chat about your fascinating work days some time Pete!
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Post by Deleted on Nov 19, 2015 9:52:50 GMT
Anytime Ed... these are my past days though....health stops me from doing as much these days...film work is very demanding...long hours which isn't good for you..at times much longer than junior doctors.... Pete
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oldnorton
Statesman
5" gauge LMS enthusiast
Posts: 693
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Post by oldnorton on Nov 19, 2015 10:41:52 GMT
Glass toughening or tempering is a process of heat treatment applied AFTER the glass is cut to size. Quite a lot of fiddly work for a commercial organisation I would have thought. People use microscope slide glass but a lot of that seems to be around 0.2mm and perhaps 1mm would be better. You can cut, nibble and grind glass to size. If you want to you, you can apparently temper glass yourself by heating to 600 farenheit in a furnace and air cooling rapidly. It would be interesting to do some experiments and see if it works on small pieces?
Or use 1mm polycarbonate sheet. It is thermally stable to 130-140 deg C and is strong enough to do a reasonable safety job in a miniature gauge glass perhaps? Or quartz silica glass for scientific use is available 1mm thick and might be a nicer material than 2mm picture glass. I get the impression that the quartz silica is quite strong but I cannot find references to shatter resistance as its main use is in optical and scientific systems. A few pieces of 30x30x1 mm are about £10 from China so I might get some and experiment.
I am going through the same 'what could I use' process myself.
Norm
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Post by bobpendleton on Nov 19, 2015 11:40:34 GMT
People use microscope slide glass but a lot of that seems to be around 0.2mm and perhaps 1mm would be better. Norm Some years ago I reported here that I have a stock of 2" x 2" slide glass left over from the days when I mounted my own 35mm colour film for projection. There were no takers and it is still available if anyone wants some. I'll dig it out and measure the thickness if that is critical. Bob
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Post by Deleted on Nov 19, 2015 12:23:36 GMT
People use microscope slide glass but a lot of that seems to be around 0.2mm and perhaps 1mm would be better. Norm Some years ago I reported here that I have a stock of 2" x 2" slide glass left over from the days when I mounted my own 35mm colour film for projection. There were no takers and it is still available if anyone wants some. I'll dig it out and measure the thickness if that is critical. Bob I'd certainly be interested in knowing how thick they are please Bob.....i'd like to use scale glass for 4472, as close as possible to the prototype cheers Pete
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Post by bobpendleton on Nov 19, 2015 14:01:45 GMT
Some years ago I reported here that I have a stock of 2" x 2" slide glass left over from the days when I mounted my own 35mm colour film for projection. There were no takers and it is still available if anyone wants some. I'll dig it out and measure the thickness if that is critical. Bob I'd certainly be interested in knowing how thick they are please Bob.....i'd like to use scale glass for 4472, as close as possible to the prototype cheers Pete Hi Pete Sometimes I amaze myself, found them straightaway. My first measurement came out at 1.82mm. Closer examination revealed that I had two pieces clinging together (as they will) so call it 0.9mm/piece. I have one opened packet which measures 67.18mm so, say, 74 or 75 pieces. There are also two unopened packets so I guess 100 in each. Have as many as you like. No charge and I'll take care of the postage. Regards, Bob
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Post by Deleted on Nov 19, 2015 14:40:24 GMT
Hi Bob That is most kind of you..I just did a little re-reading of RCTS 2A to check the glass thickness.. my memory was wrong, it wasn't 3/4", it was in fact 3/8" which is around 0.9mm in 5"...talk about perfect so yes please to your kind offer Bob, what ever you can spare would be most welcome, I could do with a break and do something a little different, a little glass work sounds very therapeutic..... A little information for anyone interested on why Gresley fitted armoured glass to his pacific's...There had been a number of incidents with express trains having their spectacle glass smashed by dislodged lumps of coal from passing trains, the first solution was to fit a hinged panel on the right hand side as some form of protection. Gresley didn't like this as it relied on the crew remembering to close the cover so did a trial with No.2544 using Triplex glass in 1929, after costing the change an order to fit all pacific's with 1/4" triplex was issued in 1932. However this wasn't the end to the story, there was a fatal accident in 1937 involving a footplate inspector and works were then instructed to fit 3/8" armoured glass. The info given is that two loco's passed each other while taking on water and that due to the onrush of water the inspector was killed.There's no more info but I'm assuming that the water shot through the spectacle plate with either the glass or the impact of water/solid object causing the fatality, I assume this as only the spectacle glass was so treated, starting from June 1938. Bob if you don't mind I'll PM you my address.. many thanks Pete
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Post by steamjohn248advent on Nov 19, 2015 20:56:33 GMT
Dennis,
You may remember our Baldwins running together at Bedford.
We have recently had to fit some locos at the Museum of Power with gauge glass protectors and after a long search I located a firm (the only one in the UK as far as I could see) who will do small toughened glass to order. Turn around time about two weeks. they did us several sizes of toughened 3mm glass at a very reasonable cost. We made the frames as bought in jobs are pricy. Contact me and I'll send you the details. John
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denis M
Part of the e-furniture
Posts: 300
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Post by denis M on Nov 19, 2015 22:56:04 GMT
Many thanks for the replies. Think we may have to just try to find plain 2mm glass.
Denis
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Post by modeng2000 on Nov 20, 2015 6:57:53 GMT
My local glazier produced some toughened glass shelves for me. Perhaps they could toughen thin picture frame glass.
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