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Thread: BMT Patent saw teeth
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31st May 2013, 03:06 AM #1
BMT Patent saw teeth
Here's a sharpening challenge ...
Montague-Woodrough Saw Company - Chicago, IL
and someone who was up for the job ... bmt_hand_front.jpg Photo by daryl_weir | Photobucket
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31st May 2013 03:06 AM # ADSGoogle Adsense Advertisement
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31st May 2013, 03:24 AM #2
Doesn't look like there's any set on the teeth?
And what's a "Circular A"?
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31st May 2013, 10:42 AM #3
BMT Patent saw teeth
'You only need a single flat file with one safe edge' ..and 15 hours.
...I'll just make the other bits smaller.
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31st May 2013, 11:48 AM #4
And what's a "Circular A"?
Junk mail.
CheersHugh
Enough is enough, more than enough is too much.
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31st May 2013, 01:26 PM #5
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31st May 2013, 08:10 PM #6Senior Member
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Besides a small flat file wouldn't you also need a "raker guage "?
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31st May 2013, 09:31 PM #7
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31st May 2013, 09:33 PM #8
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31st May 2013, 09:40 PM #9
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31st May 2013, 10:39 PM #10Senior Member
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I wonder how fast it would cut in hardwood
cheers pat
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2nd June 2013, 11:04 PM #11Senior Member
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Woodough
Can you imagine this blade with a Woodrough and Macfarlin Panther Head handle - now that would be an amazing saw - Neil (I seem to have lost linefeeds)
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16th May 2015, 06:24 AM #12GOLD MEMBER
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Well it looks like TFWW have taken up the challenge and produced their own modern version of the BMT saw:
https://www.toolsforworkingwood.com/...20the%20Future
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16th May 2015, 09:39 AM #13
Interesting! I must have a look at the patent application to see what they claim is actually unique & patentable about those teeth, because they are very similar to one of the (many!) tooth patterns on old crosscut felling & docking saws I've seen. They are shaped differently, but the principle is the same as an "M-tooth raker" i.e., a couple of pointed side-cutting teeth followed by a raker tooth to take the chips out. It seems counter-intuitive to me that the raker precedes the side-cutters in this saw - maybe there's an explanation in the patent, I better go & read it!
Cheers,IW
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16th May 2015, 10:01 AM #14
OK, the first patent is here. And whaddya know, it's all about large timber saws, so my first-impression idea of its pedigree was pretty close, it seems..
I don't know how many saw tooth patterns have ever been patented (Paul, a job for you in your spare time? ) but in my search for the patent info, I dug up this interesting tidbit: .....from 1810 to 1925 almost 900 different saw sets were patented.....
I knew there were a few different sawsets kicking about, but nothing like that. As with so many patents, most never reached the market, I assume?
Cheers,IW
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17th May 2015, 07:31 PM #15GOLD MEMBER
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What, exactly, do they claim is the value of this toothing pattern?
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