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That isn't the original patent. That is a modified post-1940 version, as i mentioned. The original patent is the JP Thompson patent #19008081 (screw - 1932) an
by DannyBee 4y ago
That isn't the original patent. That is a modified post-1940 version, as i mentioned.
The original patent is the JP Thompson patent #19008081 (screw - 1932) and patent #2046840 (screwdriver - i forget when)
- RobertRoberts 4y agoI agree, here's their original patent: https://patents.google.com/patent/US1908081A/en https://patents.google.com/patent/US1908081A/en The designers own statements of requiring "zero vertical angle" to avoid cam-out/throw-out is proof Phillips was designed with it to begin with. The patent change later only added _more_ cam-out/throw-out, it did not introduce it in 1942. Also, the 1942 patent represents the modern Phillips (which is what everyone would acknowledge is the problem screw), where the original 1932 patent looks more like a Reed and Prince.
- RobertRoberts 4y agoEdit: Previous comment should read -- "...is proof Phillips was _NOT_ designed with it to begin with."