Cast Iron Canning Jar Ring-Wrench: US Made? When?

Discussion in 'Tools' started by wlwhittier, May 20, 2022.

  1. wlwhittier

    wlwhittier Well-Known Member

    There aren't very many tools that make use of flexibility in cast-iron, at least in my experience.
    Internal-combustion engines used cast piston rings, long ago. I cannot think of another example.
    No matter...this wrench does; and to prevent over travel which would break the casting, it has integral stops in the ends of each grip arm.

    I would like to know roughly when it was made, and where. There's not a mark on it to answer those questions, let alone who designed it and formulated the specific iron alloy (and perhaps heat-treatment) to achieve such a simple and durable tool.

    Like so many old things, it's somewhat of an orphan.

    Thanks for looking!

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  2. terry5732

    terry5732 Well-Known Member


  3. wlwhittier

    wlwhittier Well-Known Member

    Not forged; please note the ground-off ingates in the first pic, below.

    5¾" long, 2⅝" ID, .250" thick at the bead around the ID; ~⅜" diameter of the stop-pads.


    Last edited: May 21, 2022
  4. wlwhittier

    wlwhittier Well-Known Member

    Now, to make this a lot more interesting: my original assessment of the purpose for this tool included an overlarge and incorrect stroke of foolishness! In measuring the ID of the ring in order to answer terry5732, I tried to fit a modern small-mouth canning ring into it. Lo and behold, to my shame & won't go!

    So...Mea in so many other things, I don't know what I'm talking about. I hereby throw myself onto the tender mercies of my betters, and hope for the best.
    Born2it likes this.
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