|T.J. Sloan, Making Wood Screws, No. 4704, Patented AUg.
20, 1846. USPTO
The unmistakable pointed wood screw, now universally used, was
patented by United States patent No. 4704, August 20, 1846...
Dating of Old Houses,
Henry C. Mercer, SC.D., Doylestown, Pennsylvania, 1923.
BY THOMAS J. SLOAN. — Nov. 24th, 1846.
Improvement in the machinery for cutting the threads of pointed
What I claim is the retarding and accelerating the motion of
the alternate cutters in making pointed screws. I also claim the
employment of a series of cutters acting alternately on the blank
to cut and finish the head of the screw, all placed on the same
side of the axes of the screw blank.
Scientific American, Vol. 2, 012. p. 92. Source: Rochester