FILENAMES:

whatsis1.jpg

DESCRIPTION:

This is a picture of a dial indicating snap gage.

Posted by Tom Jenks <tjinks@twcny.rr.com>.

The following description was provided:

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The following picture in whatsis1.jpg is a gauge/indicator I found.  
I can't figure out exactly what it is for.  The piston on the left 
side of the dial seems stuck.  It can be pushed up and the needle 
moves but doesn't return to where it was.  What is the purpose of 
the slider that comes up from 45 deg.  There is a locking screw on 
it.  The dial is graduated from -5 to 65.  It is marked "The F. W. 
Horstman Co.  Irvington, N. J.  U. S. A." and "Pat. Apld For."  The 
movement is very simple.  The piston serves as a rack which drives  
a short pinion segment.  The other end of the pivoted plate from the 
rack is a gear segment that meshes with a gear on the needle shaft.  
Has anyone seen one of these?

TJ