Trengrouse moreover invented the cork jacket or "life preserver." This was a success, and has never been improved on. It has been the means of saving many hundreds of lives. He also built a model of a lifeboat, that could not be sunk, and was equal to the present lifeboats of the Royal Lifeboat Association in all respects except the "self-righting" principle. It was not until February 28th, 1818, after many journeys to London, and much ignorant and prejudiced objection that he had to contend against, such as is found so usual among Government officials, that Trengrouse was able to exhibit his apparatus before Admiral Sir Charles Rowley. A committee was appointed, and on March 5th it reported favourably on the scheme.
In the same year the Committee of the Elder Brethren of Trinity House reported in high terms on the invention, and recommended that "no vessel should be without it."
Thereupon Government began to move slowly; in the House the matter was discussed and haggled over. One speaker exclaimed: "You are guilty of sinful negligence in this matter, for while you are parleying over this invention and this important subject, thousands of our fellow-men are losing their lives."
THE WRECK OF THE "ANSON"
From a sketch by H. Trengrouse
At last Government ordered twenty sets of the life-preserving rockets, but afterwards resolved on making the apparatus itself, and paid Trengrouse the sum of £50, the supposed amount of profit he would have made on the order. Fifty pounds was all his ungrateful country could afford to give him. In 1821, however, the Society of Arts pronounced favourably on his apparatus, and presented Trengrouse with their silver medal and a grant of thirty guineas.
Through the Russian ambassador, the then Czar sent him a diamond ring, in consideration of the great advantage his apparatus had proved in shipwrecks on the Baltic and the Black Sea. Even this he was constrained to pledge, that he might devote the money to his darling project.
With these acknowledgments of his services he had to rest contented; but ever the news of lives having been saved through his invention was a solace to an even and contented mind.