Free online plans:

http://www.charlesedisonfund.org/exp...-Expt1/p1.html

or input edison, electric-pencil into a search box

Suitable for marking metal by the arcing principle. Will work from a
six-volt lantern battery.

Mike Mandaville

Wow, I made one of these things in junior high metal shop almost 40
years ago. Did I say that?

MikeMandaville wrote:
Free online plans:

http://www.charlesedisonfund.org/exp...-Expt1/p1.html

or input edison, electric-pencil into a search box

Suitable for marking metal by the arcing principle. Will work from a
six-volt lantern battery.

Mike Mandaville

I've been married that long (same sweet gal) - had a metal home shop at home years before.
Martin
Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member


MikeMandaville wrote:
Shabtai Evan wrote:

"Wow, I made one of these things in junior high metal shop almost 40
years ago. Did I say that?"

Congratulations, young man. I must have been in high school at about
that time :-)

The Edison pencil, if built as shown, is evidently good for the softer
metals, such as aluminum or copper, though since I have a transformer
which can deliver twelve volts at eight amps, I'm guessing that I will
be able to mark tools with my version.

Mike Mandaville


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