ORR, Hugh, inventor, born in Lochwinoch, Renfrewshire, Scotland, 13 January, 1717; died in Bridgewater, Plymouth County, Massachusetts, 6 December, 1798. He emigrated to this country in 1787, and, after residing a year in Easton, Pennsylvania, settled in Bridgewater, where, having been educated as a gun-and locksmith, he built a scythe and axe manufactory, and erected the first trip-hammer that was set tip in that part. of the country. For several years he was the only maker of edged tools in that section of New England. About 1753 he invented a machine for dressing flax, and became an exporter of flax-seed. Previously, in 1748, he had made 500 stand of arms for the province of Massachusetts Bay, and they were deposited in Castle William, but were nearly all carried away by the British when they evacuated Boston. At the beginning of the war of the Revolution, Orr became a warm adherent of the popular cause, and was again employed in the manufacture of arms. In concert with a French gentleman he erected a foundry for casting, here a great number of iron and several pieces of brass ordnance varying from 3- to 42-pounders were made, besides a vast quantity of cartoon-shot which proved of the utmost value to the patriots. In 1786 he employed two brothers, named Robert and Alexander Barr, from Scotland, to build for' him three carding, roping, and spinning machines. The legislature voted a grant of £200 to fissure their completion, and subsequently awarded the Barrs six tickets in the state land lottery, in which there were no blanks, as a reward for their "ingenuity " and " public spirit." Mr. Orr was allowed to use the machines as compensation for his trouble. They cost £187, and are believed to have been the first "jenny" and "stock-card" machines that were made in the United States. Mr. Orr was for several years a state senator.--His son, Robert, was the inventor of an improved method of making scythes with the trip-hammer, and was the pioneer in New England in the manufacture of iron shovels. In 1804 he was master-armorer at the United States arsenal at Springfield, Massachusetts.