Strain Stress Gauge Set Ff Metzger Son 1932 Ptd 8" Bar Dial Micrometer Wood Box

US $220

  • Buffalo, New York, United States
  • Jan 30th
 Antique strain gauge with analog dial to measure stress/strain in construction/engineering materials.  Comes in nice wooden box with blue velvet lining.  Main bar unit, but a second bar with marks for 4,5,6,7, and 8 inches.  Also a 19/32" Williams wrench for adjustments in the set.  I think the main pivot point on the bar is stuck.  Needs lubrication I am sure.  The manual dial indication moves nicely when the plunger is moved by hand.  Not sure on age.  Marked 1932 for patent.    My guess is 1930-40's.  Manufactured by F F Metzger and Sons,  Philadelphia.  Made in USA.

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