Specification of Andrew Robertson : preventing smoke.

  • Robertson, Andrew.
Date:
1860
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Andrew Robertson : preventing smoke. Source: Wellcome Collection.

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    Robertson s Improvements in Preventing Smoke. SPECIFICATION in pursuance of the conditions of the Letters Patent, filed by the said Andrew Robertson in the Great Seal Patent Office on the 9th November 1860. TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Andrew Robertson, of Neilston, in the County of Renfrew, North Britain, Bleacher, 5 send greeting. WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters Patent, bearing date the Eleventh day of May, in the year of our Lord One thousand eight hundred and sixty, in the twenty-third year of Her reign, did for Herself, Her heirs and successors, give and grant unto me, the said 10 Andrew Robertson, Her special licence that I, the said Andrew Robertson, my executors, administrators, and assigns, or such others as I, the said Andrew Robertson, my executors, administrators, and assigns, should at any time agree with, and no others, from time to time and at all times thereafter during the term therein expressed, should and lawfully might make, use, 15 exercise, and vend, within the United Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for “ Improvements in Preventing Smoke,” upon the condition (amongst others) that I, the said Andrew Robertson, my executors or administrators, by an instrument in writing under my, or their, or one of their hands and seals, should par- £>0 ticularly describe and ascertain the nature of the said Invention, and in what manner the same was to be performed, and cause the same to be filed in the Great Seal Patent Office within six calendar months next and immediately after the date of the said Letters Patent. NOW KNOW YE, that I, the said Andrew Robertson, do hereby declare 05 the nature of my said Invention, and in what manner the same is to be per¬ formed, to be particularly described and ascertained in and by the following statement in writing, that is to say :— My said Invention has for object the prevention of smoke in furnaces of various kinds, and comprises a system the practical working of which may be 30 assisted by sundry special contrivances ; but which without such contrivances is capable of more or less complete application in almost all ordinary furnaces. The Invention consists in systematically and constantly admitting air from the ash-pit through and between the fire-bars at their front ends, and is carried out in its simplest form by arranging the fuel so as to leave uncovered the 35 front ends of the fire-bars to the requisite extent. The extent of the fire-bars to be thus left uncovered cannot be defined by a rule applicable to all cases as it will vary with the numerous peculiarities of each furnace ; but in practice