ph@wudma.UUCP (04/08/85)
A few weeks ago I posted a request for someone out there more mechanically inclined than I to explain how the Rouleaux drill bit (the one that drills square holes) was driven, since it didn't rotate around a fixed axis. Unhappily all I have received in reply is one one-sentence message saying, "Use an eccentric chuck and a square template." (I have since lost the actual message, so I'm afraid I can't address the poster directly.) Well. The use of the template had already been discussed in previous messages on the subject, but I must admit to some confusion about the eccentric chuck. If by that you mean a chuck which is off-center, surely this would not work; the bit would still rotate about a fixed axis, just not the one which is its center. You would end up making a somewhat larger but still round hole. If, on the other hand, you mean the device which I have heard called a "free-floating chuck", that's fine but it still leaves me in the dark as to how the widget works. So once again may I request that someone please explain just how it is this magic device works? Thanks. --pH P.S. I apologize in advance for requesting information on a subject which really needs diagrams for proper discussion.
gjerawlins@watdaisy.UUCP (Gregory J.E. Rawlins) (04/11/85)
In article <233@wudma.UUCP> ph@wudma.UUCP writes: > So once again may I request that someone please explain just how > it is this magic device works? Thanks. > --pH The drill was described in Martin Gardener's Mathematical Recreations column in the February 1963 edition of Scientific American. If you need further information he give the patent numbers for the device. greg. -- Gregory Rawlins CS Dept.,U.Waterloo,Waterloo,Ont.N2L3G1 (519)884-3852 gjerawlins%watdaisy@waterloo.csnet CSNET gjerawlins%watdaisy%waterloo.csnet@csnet-relay.arpa ARPA {allegra|clyde|linus|inhp4|decvax}!watmath!watdaisy!gjerawlins UUCP