Okay, I will preface this by saying, I haven’t uncovered any further information than other reported previously on the Elters patent Vise-O-Lift.
…but I have uncovered another Vise-O-Lift.
In digging around, I did find that W.S. Elters was the owner of the Gem City Sheet Tin Shop of Dayton, Ohio, which later became the Gem City Sheet Metal Co., of the same city, but little else has turned up thus far.
The hunt will continue!