![]() ![]() The fact that the known valves were not used, and the speedy and extensive adoption of Richardson's valve, are facts in harmony with the evidence that his valve contains just what the prior valves lack, and go to support the conclusion at which we have arrived on the question of novelty. He used some things which had been used before, but he added just that which was necessary to make the whole a practically valuable and economical apparatus. Richardson's invention brought to success what prior inventors had essayed and partly accomplished.The specification of the patent is as follows: Go to ![]() Richardson, September 25, 1866, for an improvement in steam safety-valves. On the 27th of May, 1879, the Consolidated Safety-Valve Company, a Connecticut corporation, brought a suit in equity, in the Circuit Court of the United States for the District of Massachusetts, against the Crosby Steam Gauge and Valve Company a Massachusetts corporation, for the infringement of letters patent No.
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