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Mine Exploration Forum

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Author Sigafoos Rotary Tunneler
nwminer

Joined: 27/11/2007
Location: Maple Valley, WA USA

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Sigafoos Rotary Tunneler
Posted: 14/11/2012 04:08:52
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On ebay at the moment is a stock certificate listed for the Colorado Rotary Tunnel Machine & Dev. Co. - included with the stock certificate is a postcard showing the Sigafoos Tunneler (same view as posted previously). Of interest is that the back side of the post card is also shown, giving some further info (tunneler diameter of 8 ft, and that this was the first tunneling machine used in the USA). Stock certificate date is 1909. IP: 71.212.75.4
carnkie

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Joined: 07/09/2007
Location: camborne, cornwall

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Sigafoos Rotary Tunneler
Posted: 14/11/2012 09:47:18
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There is not a very good photo here.

[web link]

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The past is a foreign country: they do things differently there.
IP: 92.28.222.108
grahami

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Joined: 29/01/2007
Location: Telford, Shropshire

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Sigafoos Rotary Tunneler
Posted: 14/11/2012 11:39:26
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Patent drawings (I don't think I've posted them before...) Innocent

http://www.aditnow.co.uk/photo/Personal-Album-54-Image-80629
http://www.aditnow.co.uk/photo/Personal-Album-54-Image-80630/
http://www.aditnow.co.uk/photo/Personal-Album-54-Image-80631/
http://www.aditnow.co.uk/photo/Personal-Album-54-Image-80632/

Cheers
Grahami

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The map is the territory - especially in chain scale.
IP: 212.219.117.106 Edited: 14/11/2012 11:40:42 by grahami
vorlon

Joined: 06/08/2020

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Sigafoos Rotary Tunneler
Posted: 06/08/2020 16:18:05
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Hello Graham,

If you can access Newspapers.com there is a 1909 article concerning the Sigafoos.

https://www.newspapers.com/image/206559478/?terms=sigafoos

I haven't had any luck with the U.S. Patent or which R.B or Russel Sigafoos. The was a Russel Sigafoos in Montana who was manager of the American DeForest Wireless company. This is possibly him.None of the Sigafoos entries at Findagrave seem to be him.

Best of luck
Steve Stewart
IP: 205.232.28.240
Yorkshireman

Joined: 23/06/2011
Location: Hanover, Germany

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Sigafoos Rotary Tunneler
Posted: 07/08/2020 23:05:27
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Russell B. Sigafoos, "Rotary tunneling machine," U.S. Patent 901,392 (filed: May 18, 1907; issued: October 20, 1908).

Source: Wikipedia Tunnel Boring Machine - Notes

Download the PDF of the patent here (the text on the website is almost unreadable:
https://patents.google.com/patent/US901392

This may well be a related patent (what a wonderful description!Big Grin:
https://patents.google.com/patent/US912904A/en?inventor=Russel+B+Sigafoos

I reckon the second picture at the start of this thread refers to the difference between tunnelling tools from 1849 (quote: was a miner, forty-niner etc.) and 1909 (which tallies quite well with the patent issue date)
IP: 87.150.66.154 Edited: 07/08/2020 23:46:07 by Yorkshireman
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