[TheForge] A different needle question

[Jerry Frost]

I read about this same technique for wound flat springs of many types, from
clocks to firearms to bell mechanisms. I don't remember the book even though
I can visualize the text and illustrations in my mind's eye. Heat to cherry
red, (low orange) water quench, lay in a shallow ceramic dish in a little
oil, light the oil and it's done when it's cool. As I recall the
illustration the oil depth was less than half the width of the spring strip.

Frosty
-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Bob Ehrenberger
Sent: Friday, October 25, 2013 4:22 AM
To: theforge
Subject: [TheForge] A different needle question

I don't think that I've seen this one on this question.

I have not tried this, but guys that build flint locks tell me that they
temper the springs by putting them in a shallow dish, covering the spring
with oil and lighting it.  By the time the oil burns off the spring has
reached the proper temper.

Robert Ehrenberger
Shelbyville, Mo.
eforge at centurytel.net