Carlson MTT-1 Torsion Spring Tester
  This is a Carlson model MTT-1 Electronic Tester for torsion springs. It powers up, and as far as I know it does what it is intended to do. You can test all kinds of torsion springs with this. The chuck holds a user-supplied arbor to fit the inside of the spring, or if necessary you can fabricate special holding devices to suit special needs. The "tailstock" carries a degree ring so you can test spring force against angular deflection.
   This closeup shows the device set up to test a small spring. Notice the light surface rust from sitting on a shelf for a couple years.
   This picture shows the display and controls and the data tag.
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