PSN-L Email List Message

Subject: Re: SPREGNETHER HORIZONAL SEISMOMETER
From: "JAMES C ALLEN" jcallen1@...........
Date: Fri, 06 Apr 2012 21:46:15 -0700


Hello George.  I really appreciate your offer to make me a hinge.  However, 
I mailed the stock and drawings to Jim Hannon this morning who is making one 
for me.  I hope I can count on your assistance in the future since I know I 
will be needing it.  Again, I really appreciate your offer and kindness.
Jim Allen

-----Original Message----- 
From: George Bush
Sent: Friday, April 06, 2012 9:24 AM
To: jcallen1@........... ; psnlist@..............
Subject: Re: SPREGNETHER HORIZONAL SEISMOMETER

James-

I may be able to help if you can't find a lower hinge  and have to
make one. My hobbies are PSN, model railroads, and amateur machine
shops. I have a precision mill, drill press and lathe and would be
glad to try to make you a hinge.

Please send me a drawing or picture, or even send me the old part so
I can see what you need and it's dimensions and I will try to make
something for your instrument.

George

At 09:45 PM 4/4/2012, you wrote:
>I know that this is a long shot, but does anyone have parts for an old 
>Spregnether horizontal seismometer?  Specifically the lower wire hinge. 
>The piece is a short wire with a round brass fitting at each end.  I tried 
>to make it myself using piano wire and round brass stock.  But drilling the 
>round brass stock to insert the wire into has been fraught with failure 
>thus far since the very small drill bits I purchased at the hobby shop keep 
>breaking,  Also, any advice on drilling an approximately .030 diameter hole 
>in round brass stock would also be appreciated.  Do machine shops do this 
>kind of work?
>James Allen
>

George


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