Talk:Pyrometric device

Hello,

There is a confusing line in the History section concerning Josiah Wedgwood's contribution. it reads:

'''In 1782, Josiah Wedgwood created accurately scaled pyrometric device, with details published in the Philosophical Transactions of the Royal Society of London in 1782 (Vol. LXXII, part 2). '''

Should that read devices or an accurately-scaled pyrometric device or the first accurately-scaled pyrometric device? It might seem to be trivial, but all three of these different wordings imply different possible interpretations of JW's contribution. I suspect it's simply a typo, but the discussion below between andy and steph makes me loathe to just jump in and make the change myself.

Nzelnick (talk) 17:25, 1 September 2012 (UTC)nzelnick --

Hello all, needs some polishing up but any thoughts? Regards, Andy

Hello Stuph, Thanks for the contribution but I think you were a little heavy with the editing on Josiah Wedgwood. I've now merged yours with the earlier. Seems better to me, and to you?

Regards,

Andy

Hello Stuph, I've not added to the entry eyt but I think it very, very important that a brief explanation be given about heat work as it's a rather loose and imprecise concept ... any thoughts?

Regards, Andy

its a bit presumptuous to give one fella the credit for "inventing" the idea pyrometric devices. i've mirrored the history content from pyrometric cones, as its a bit more appropriate. Stuph

Hi Stuph, I hope you don't mind that I've moved you comment so that it is now in chronological order. Any way you're being a little unfair to J.Wedgwood as he is credited with the invention of modern pyroscopic devices, as well as being the first to apply scientific principles to pottery/ceramics. Although much has been published on him a brief online summary can be found at [] with his invention noted towards the bottom. I'v added a little about him to the entry

Regards, Andy

andy

saying "invented the first accurately scaled pyrometric device" is far more appropriate than "Pyrometric devices were invented by". thank you for qualifying his section. however, your article states he is credited with, "inventing the pyrometer to measure oven temperatures" I've found multiple articles on him, and the closest reference I can find credits him with, "developing a system of pyrometric beads, made of a varying mixture of ceramic materials which would contract according to the heat work done on them. He devised a simple scale by which the size of the beads could be measured and an approximate temperature read off the scale." I attempted to be more specific by mentioning these beads. when the industry can not agree on a "first inventor" i do not think one should be incorrectly identified here. I am striking the word "inventor" and "first" from the article. Stuph

Hi Stuph, I'm don't understand your confusion with the BBC link ... the pyrometer to measure oven temperatures were the beads you describe and were a pyrometric device. There is agreement on the "first inventor", though you may be better to qualify using words such as controlled, reproduceable, using a scientific approach. I'll try to hunt down some other references

Regards, Andy

Hello Stuph, Found two quicket than I thought:
 * The earliest form of pottery pyrometer is that devised by Wedgwood. It consists of small cylindrical pieces of clay which have been previously heated to a low temperature, and their length accurately measured in a special scale. These small pieces of clay are then placed in the kiln and are drawn out one at a time, allowed to cool, and their length again measured, the contraction giving a rough idea of the temperature.The Clayworkers’ handbook. Searle A.B. 4th edition. Charles Griffin & Company Limited 1929


 * In January 1782 he had progressed to the point of making a gauge for measuring the degree of shrinkage undergone by clay cylinders ... We know now that Wedgwood’s ‘thermometer’ indicated heat-work rather than temperature, but this fact was not recognised for many years neither could it be proved until other pyrometers became available around the middle of the eighteenth century.Josiah Wedgwood; the arts and Sciences United. Science Museum London Catalogue for exhibition March to September 1978

Regards,

Andy

Bullers Rings
I have reinserted the recently added section. I can not understand any reason for its removal, including:
 * Bullers rings are globally recognised standard pyrometric device.
 * There is only one company that producers them: Taylor Tunnicliff.
 * Bullers rings have been mentioned in this article for sometime: I have just added some more, relevant information.
 * The information I have added is referenced.
 * Information on another type of pyrometric device and a manufacturer, Orton, is included.
 * The information about Bullers rings is no more commercial than that for Orton.
 * The information about Orton is unreferenced.
 * Should the information about Bullers rings be deemed unacceptable than that about Orton must also be, and so that also has to be removed. —Preceding unsigned comment added by 210.54.238.178 (talk) 03:04, 3 May 2010 (UTC)