Table of Contents
When were Phillips screw invented?
Phillips’ major contribution was in driving the crosshead concept forward to the point where it was adopted by screwmakers and automobile companies. The credited inventor of the Phillips screw was John P. Thompson who, in 1932, patented (#1,908,080) a recessed cruciform screw and in 1933, a screwdriver for it.
Who invented the Phillips bit?
businessman Henry Phillips
In the early 1930s, the Phillips head screw was invented by Oregon businessman Henry Phillips (1889–1958). Automobile manufacturers now used car assembly lines. They needed screws that could take greater torque and could provide tighter fastenings.
Why are Phillips screws called Phillips?
The significance of the crosshead or Phillips screw lies in its self-centering property. In 1933, Henry Phillips purchased the rights to a socket screw and redesigned the screw with a cruciform recess.
Who invented the first screw?
P. L. Robertson
Screw/Inventors
Who invented Robertson screws?
Peter L. Robertson
The solution was found by a 27-year old Canadian, Peter L. Robertson. He was a pitchman for a Philadelphia tool company, a traveling salesman who sold goods at trade fairs and on street corners throughout eastern Canada. He spent his spare time in his workshop.
When were Allen screws invented?
In 1909–1910, William G. Allen too patented a method of cold-forming screw heads around a hexagonal die (U.S. Patent 960,244). Published advertisements for the “Allen safety set screw” by the Allen Manufacturing Company of Hartford, Connecticut, exist from 1910.
Who invented screws and bolts?
philosopher Archytas of Tarentum
Although the Pythagorean philosopher Archytas of Tarentum (5th century bc) is the alleged inventor of the screw, the exact date of its first appearance as a useful mechanical device is obscure.
Why did PL Robertson invent the screw?
He was demonstrating a spring-loaded screwdriver when the blade slipped from the screw-slot and badly cut his hand. The incident inspired him, so he decided to invent an improved and safer screw – The Robertson® Drive. P.L Robertson always looked for a better way of doing things and enjoyed working on new innovations.
Who invented Allen screws?
William G. Allen
In 1909–1910, William G. Allen too patented a method of cold-forming screw heads around a hexagonal die (U.S. Patent 960,244). Published advertisements for the “Allen safety set screw” by the Allen Manufacturing Company of Hartford, Connecticut, exist from 1910.
Who invented the screw simple machine?
Archimedes
Although Archimedes is credited with inventing the screw in the 3rd century bce,…
Who invented wood screws?
Archytas of Tarentum