Estimated Date: 1860
Name: Lithotrite, Rack and Pinion
Description: 13” steel body with end curve upward for 1.5” at about 80 degrees with distal lip hollow and internal rod with teeth. The internal rod ends with teeth (rack) which are advanced (pinion) by rotating 6” long rod with 2.5” checkered ebony handle at R angle to advance sliding inner rod. The rack is held in place by the screw mechanism which is only .5” long and pops up on spring rod inserts in it.
Reference 1: 160