The Shop > Tools
Ye Olde Screwplate
Fergus OMore:
The answer now to the Funny threads s that these are Lowenherz threads for German optical etc stuff.
I now recall GHT writing about making a 42.5MM thread on his Leica camera.
Now we have it- easy( if you have a 1942 copy of Machinery 's Handbook and GHT's equally pedantic prose.)
N
vtsteam:
I probably will use the screwplate and threads, just because I enjoy doing stuff that other people aren't doing, and because I like to connect with people who made things in the past. And because I like to see old tools being used and not just sitting on shelves in a museum, or at the bottom of a pile on a sale table.
Whether or not people will curse me in the future because I didn't make replacement screws easier to come by, I can't say -- personally, I doubt they will remember me for any reason at all. :lol:
And iIf it causes them to have to do historical research, and then develop an older skill to replace them, I'll feel I've contributed something to the world, after all.
Ned Ludd:
Hi Guys.
Just to add another line of thought, let us not forget wheel spokes can have gauge size threads.
Ned
wgw:
I have one of these screw plates, marked "the weiss" and Warrington (a town in N England ). There are 12 pairs of holes but no size markings, range from aprox 5/16" to aprox 1/8", look like whitworth threads . I think each pair is a starter and finish die, but have never tried them. I always understood that they were used by blacksmiths and mechanics to make a thread for repair work.
Rick O Shea:
Clockmakers use these screw plates and they are fairly common in clockmakers workshops today I have a lot of them which I regularly use. They may have been made by Stubbs but were sold all over Europe certainly Stubbs made them for the french clockmaking industry and I suspect they were exported to the USA at the end of the 19-early 20 cent. They are really good for matching old threads found in clocks and other mechanical devices with non standard pre Whitworth form thread pitches.
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