Tuesday, November 27, 1923. Oil Filters
The modern oil filter was patented by George H. Greenhalgh. Prior to this, automobiles simply used a screen, which would partially account for the short engine life early automobiles had.
The Purolator oil filter is essentially what most vehicles use today, and is still in production.
The Purolator original design featured the cardboard filter which was inserted into a fixed housing. I've worked on vehicles that retained this filter design exactly, and it is essentially the same as a modern filter except now the housing comes with the filter, and you replace the entire thing. I've also worked on cars that used this sort of filter for their fuel filter.
While a revolutionary design, it did not become immediately widespread. It wasn't until the 1950s, apparently, when they became universal, although my 1946 CJ2A, which I sold long ago, had one. A 1954 Chevrolet Sedan I once had also had one.
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