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An explanation about the Robertson screw
Posted: Tue Nov 12, 2024 2:22 pm
by Herb Iffrig
Re: An explanation about the Robertson screw
Posted: Tue Nov 12, 2024 6:27 pm
by bryan831daniel
Herb - I saw that too, very interesting. Seems like they’re potentially missing some time between 1913, when this screw was first used, and 1932/1935 when the Phillips head was invented by Thompson and patented by Phillips. The Phillips head screw would have never been used on a Model T like the video implies.