p.s.
I just had a thought. Since you can buy magnets that are the same thickness as standard stained glass (1/8"), you could actually place a magnet into the design of a leaded stained glass window dial. It would be surrounded by soldered lead came, just as if it were a piece of glass in the design pattern! This would give a VERY strong magnetic bond since the two magnets would be directly in contact with each other- without a piece of glass sandwitched in between them. And the magnets wouldn't slide around, since they would be restrained by the ridge of lead came around them. You wouldn't need a rubber cushion either, since the gnomon's magnet would be touching glass. I think I like this idea the best! John From: [email protected] [mailto:[email protected]] On Behalf Of Tony Moss Sent: Tuesday, January 04, 2011 6:28 AM To: Sundial Mailing List Subject: Re: Glass on Glass Mosaic Indoor Sundial Windows On 04/01/2011 05:27, John Carmichael wrote: Oh, by the way, on a related subject, I've been thinking about a neat way of firmly attaching a gnomon to a glass sundial that would prevent the glass from breaking if something bumps into the gnomon (i.e. a window washer or house painter) You could attach a gnomon that has a flat steel base to the outside of the glass by placing a magnet on the inside of the glass. I've already tested this and it works great! If somebody bumps into the gnomon, instead of cracking the glass, it simply falls off and you just stick it back on. This method of gnomon attachment is especially easy to do with a perpendicular rod gnomon since it just has one point of attachment. just put a flat steel base on the rod that will attract the magnet. Simple! No drilling, nuts, washers, or soldering needed! Great idea John but I think I would take it a stage further and have a magnet within the base of the gnomon for a mutual strong pull through the thickness of the glass. Ultra-powerful 'rare earth' magnets are easily available these days in a variety of forms. I have a pair which are 1/4" cubes and are impossible to separate by hand with a straight pull. Even sliding them apart is difficult. Google < rare earth magnets > for infor' and availability. Tony Moss
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