Whitehead Machining Patent
Greg Whitehead @grwster • 20221106183335000
[I love old patent diagrams]
A micrometer for measuring the diameter of a screw, patented by George E Whitehead in 1887.
Back when people cut their own screws, I guess:
"In cutting screws I am at all times enabled to quickly ascertain the trueness of the die by gaging the screw cut thereby and comparing the reading with the known reading of the standard screw"
Kind of wish I was related to George, but from what I know I'm not.
