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Thread: Cox's Patent Auger Bit,
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12th November 2019, 10:14 AM #1Try not to be late, but never be early.
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Cox's Patent Auger Bit,
In 1903 Edward Thomas Cox of Yering, Victoria, received a patent for an improved wood boring auger.(Aus' Pat 13195) He also patented his auger in Great Britain, France and 1905 USA which is shown here: https://patentimages.storage.googlea...d/US778845.pdf
In his description he say's:
"My said invention is confined, chiefly, to the tip or worm of the auger, namely, in the set or taper of the spiral thread of such tip so arranged as to form a double thread, each thread conjoining at its termination with one of the two cutting blades or wings at the head of the auger, and in prolonging or extending the tip spiral grooves from the base of the tip downward into the walls of the auger below the edges of the cutting-blades, whence they taper off to vanishment........."
I recently came across a pair of this style of bit both by W. Marples & Sons and branded Cox's Patent. The design of his lead screw is quite evident and differs from that of a Scotch bit which coarse lead screw terminates at only one of the cutters.
Enquiries in UK found no mention of Cox's bit in any Marples catalogues and the gent who I asked suggested they may have made them for the Aus' market only.
Mr Cox gave his occupation as fencer and there is a war service record of a E.T. Cox here: Edward Thomas Cox | The Australian War Memorial
though whether this is the same man I'm reluctant to guess.
Has anybody come across an example of this bit or have any information to add?
Cheers,
Geoff.Last edited by Boringgeoff; 12th November 2019 at 10:21 AM. Reason: puncturisation.
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12th November 2019 10:14 AM # ADSGoogle Adsense Advertisement
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17th November 2019, 09:27 AM #2Try not to be late, but never be early.
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I've added a photo of Cox's and a Scotch bit side by side in the unlikely scenario that a reader of this thread is unfamiliar with auger bits.
Cheers,
Geoff.
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17th November 2019, 11:02 AM #3
Have you been boring holes in brick walls with that scotch bit Geoff?
I'm sure you wouldn't be guilty of such vandalism, of course, but me being me, as soon as I saw it I itched to reach for an auger file and give it a bit of TLC. Which lead to a further thought - how would I deal l with the damaged lead screw? Maybe a small chainsaw file and some very careful filing? Is there a recommended way to tidy up a damaged lead screw?
Cheers,IW
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17th November 2019, 02:36 PM #4Try not to be late, but never be early.
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Ian, I've been looking at your posts for a long time and am absolutely certain that you know infinitely more than I do about sharpening every kind of tool. The reason that scotch bit made it onscreen is it's the same size as the Cox and was grabbed out of the "yet to be looked at" box. What I should have done, of course, is selected a Wm Marples & Sons scotch bit for a more accurate comparison and made sure it was clean and tidy.
Cheers,
Geoff.
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17th November 2019, 06:45 PM #5
Apologies Geoff, I didn't mean to embarrass you, I've got a few things in worse shape than that bit in the "to be looked at when I get around to it" box. Some have been waiting for more years than I reckon I have left! This year was going to be my big tidy-up & clear-out year, but little has happened in that vein so far, & I see distinct signs that 2019 is about to be spoken of in the past tense.
Really, I was musing out loud about how one might repair the leadscrew as well as asking a question - someone, somewhere, always has a better idea than I have, which I'm more than happy to file for future use....
Cheers,IW
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18th November 2019, 09:17 AM #6Try not to be late, but never be early.
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No I wasn't embarrassed Ian, I read your comment on the state of the lead screw, had a look at the photo and agreed it does look a bit rough, and I could see your point. The photo is larger than life and exaggerates the roughness, the bit is only 3/4" dia and has had a hard life.
I've got a couple of very thin triangular files for sharpening bits and I've got a few sets of good ready for action bits. There's a roll of bits, a file and a 10" brace permanently in our caravan........... just in case. I've also got boxes of "as found" bits waiting for attention.
The eventual aim is to clean, de-rust all the accumulated bits and categorise them into type, manufacturer and even size which will need a storage system with hundreds of compartments, and that was supposed to be going to happen this year.
Cheers,
Geoff.
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22nd November 2019, 02:50 PM #7Intermediate Member
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Hi Guys.. here are some odd bods... the one on the left is a Ridgeway, on the right is a Mathieson.. both have double threads.. Neither have any reference to a patent..
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23rd November 2019, 08:27 AM #8Try not to be late, but never be early.
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Good one(s) Kenny, I was hoping that more would come to light. I suppose the lack of a patent on them suggests that they may be later than the Wm. Marples. Ridgeway and Mathieson must have seen some virtue in tooling up to make them, and you'd expect to find some sort of publicity promoting their advantage over the conventional lead screw.
Thanks for showing them.
Cheers,
Geoff.
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