Author Topic: Random bar, chain and sprocket development  (Read 1394 times)

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Offline HolmenTree

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Re: Random bar, chain and sprocket development
« on: October 25, 2016, 05:45:56 pm »
Some development history here on rim sprockets. From what I can find Oregon didn't introduce the Powermate rim sprocket until 1967-68.
McCulloch sold  a rim as far back as 1964 but it was solid to the drum. But in 1964 Armstrong introduced a floating spline drum rim sprocket.

So I'm thinking Armstrong was supplying McCullough the rims since they started in the sprocket business in 1959.
But nothing on information about Armstrong after Oregon introduced the PowerMate rim a few years later.

Oregon was know to have been involved in many patent wars but I'm thinking they may have just bought Armstrong out.



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