Henry Hindley (1701–1771) was an 18th century clockmaker and maker of scientific instruments. He was the inventor of a screw-cutting lathe. He built a clock for York Cathedral, where he apparently lived for much of his life, in 1752.
Solid information about the man, outside of his relationship with John Smeaton, appears to be difficult to come by.
He is thought to have made the world's first equatorially-mounted telescope, which can now be seen in Burton Constable Hall.