Sometime in the early eighties, I built a tool holder to a design published in Model Engineer, intended to assist in tool retraction during screw cutting and boring operations, photo 1. The article was by 'Martin Cleeve', although I cannot verify this. It is odd, as he filed the patent for his retracting swing tool holder in 1970 and this would seem to be the Mk.l version. Perhaps he described both, and I went for the easier option when I made mine.
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