Morris Co., then through its history, and explain what caused the company's switch in focus from eyeglasses to miniature
screw threads?
The displacements and slopes during this initial region were calculated, as it was thought they corresponded to the
screw threads sinking into the polyurethane foam as the system stabilized.
Lead of thread: The lead of thread is the distance a
screw thread advances axially in one complete turn.
Some of the issues associated with proper
screw thread is attributable to their many different sizes and shapes, the hardness and quality of the steel used in screw construction, the hardness of the metal where the attachment screws are threaded, and the quality of the tools being used.
The
screw thread dates back to 250 B.C, when it was invented by Archimedes.
On November 18, 1948 metalworking professionals on both sides of the Atlantic tossed their hats in the air and shouted a collective "huzzah." That day, delegates and representatives from the governments of Canada, the UK, and the US met at the National Bureau of Standards, Washington, DC, to sign a Declaration of Accord on unification of the American and British standard systems of
screw threads. The lack of fully interchangeable
screw thread parts had been a major stumbling block for industries dependent on assembly-line production, and--bottom line--to encouraging international trade.
Then I drilled a hole to tap for an 8-32
screw thread. I carefully drilled a #8 hole near the end in one side of the fork and at the opposing side of the fork I drilled a #27 hole for an 8-32 thread.
The
screw thread was also challenging, largely because of the close tolerances involved.