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Eureka form relief tool

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Rob.Wilson:

--- Quote from: rotorhead on December 19, 2012, 01:26:13 PM ---Hello Lads,

Might I be so bold, as to ask if there is a current set of drawings, or even Ivan Laws publication available among'st the fora, for this contraption.

Chris

--- End quote ---

Here you go http://www.amazon.co.uk/Gears-Gear-Cutting-Workshop-Practice/dp/0852429118


Rob

philf:
Rob, Chris,

The Stephen M Balzer attachment is a different beast to the Eureka. It uses gears. It was patented in 1895. You can view the patent application here:

https://patentimages.storage.googleapis.com/pdfs/ec8d3eb4c5ebb85c2ce3/US535127.pdf

In 1906 Charles G Taylor patented another relieving attachment which looks a little more like the Eureka:

https://patentimages.storage.googleapis.com/08/e4/92/3588edcf0129bc/US817885.pdf

I have a book dated 1916 with another variation looking even more like the Eureka but it allows cutters with 9, 12, 18 & 36 teeth to be backed off.



I've attached a pdf of the article including an explanation. It's much easier to understand if you've got one mounted on the lathe in front of you as Craynerd knows.

Rob - what material did you use for your cutters? I'm thinking of using O1 tool steel. (By the way Rob - I've just remembered that I promised you a stereo microscope!)

Phil.

rotorhead:
Hi Rob,

That's great stuff, went straight there and it should be here Friday, with '1 day click'

I'll save those very nice pics of yours too, and later I'll look for that other book you mentioned.

Thanks for that Rob, a scanned page or two would be appreciated, as the more cross referencing of the same principle would help towards stress relieving my brain cells.

Whilst typing this missive I received another posting notice, thanks go to Phil as well.

Chris

Rob.Wilson:
Hi Phil


Nice patent finds  :thumbup:

 If you have a look at the photo I posted in shows a ratchet and pawl and re reading the text it dose not mention gears on this device .


I used gauge plate to make my cutters .


Rob

Rob.Wilson:
No worries Chris  (rotorhead)


I take it your planning on making one ?


Rob

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