Martin (3)
NB it is possible this refers to Henry Martin (b.1855) who was a marine engineer living in Cardiff in 1891.
1892 Mr. Martin patented a stokehold ventilation system as described in The Engineer 1892/09/30
1893 Mr Martin was a member of local Reception Committee for the Institution of Naval Architects meeting in Cardiff.
1893 At the meeting of architects in Cardiff:
"... Mr. Martin's System, and these trials were made in comparison with-forced draught. At first they were carried out on a locomotive boiler, but experiments had recently been made on a torpedo boat at Chatham, where one stokehold was being worked ...[1]
1893 ... Martin's system of draught instead of having the ordinary closed stokehold. The feature of this system is that the draught is induced, not forced, the fans being placed ....[2]
At the meeting it was reported that "The Admiralty had made extensive trials with induced draught on Mr. Martin 's system. They were made in strict comparison with forced draught. They were first carried out on a locomotive boiler at Portsmouth , and they had been more recently repeated in a torpedo gunboat at Chatham, one stokehold being worked in the ordinary system, and the other under the induced draught system. These experiments, so far as they had gone, did not bear out the claim to certain of the advantages of induced draught over forced draught which Mr. J. D. Ellis's trial led him to think would be gained. In the French service, before forced draught was adopted, trials were made of induced draught, but after a considerable trial the French set it aside in favour of the closed stokehold."[3]