0t---1943 American Pacemaker----Wikipedia goof?
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  1. #1
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    Default 0t---1943 American Pacemaker----Wikipedia goof?

    so I am chasing history of 3 dimensional barrel cams--Wikipedia is of course referenced

    and Wiki article on cams has photo reference of American Pacemaker lathe cross feed
    assembly with extracted cylindrical element labeled constant lead barrel cam---
    and in my opinion--this construct does not qualify as a barrel cam mechanism

    in fact, American Tool Works product literature--1943--provides detailed focus on the mechanism--
    referring to it as "micrometer ball stop"

    as a gearhead--I find a degree of satisfaction in Wiki reference to Pacemaker class tools--but
    using the rapid retract/advance mechanism with single fixed ball in constant pitch ground screw
    is inappropriate- a multitude of more appropriate barrel cam examples are available
    Attached Thumbnails Attached Thumbnails ap7.jpg   ap4.jpg   ap3.jpg   ap5.jpg   ap6.jpg  


  2. #2
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    2---------------------------------------------


    Cam - Wikipedia


    https://pounceatron.dreamhosters.com...16-1943-si.pdf
    Attached Thumbnails Attached Thumbnails ap7.jpg   ap8.jpg   ap9.jpg  

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    My 57 16x120 has it...Phil

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    Same setup on my 1918 L&S, the 43 Pacemaker and the 46 Sidney here at work. Super handy thing for repetitive work.

  5. #5
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    Many thanks for putting the great pacemaker pictures on here.Where I worked, one of those greeted you as you entered the machine shop.I think it was a 20",but that's 50 years ago.A great memory brought back.

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    I have owned quite a few lathes with that type of stop on the cross feed screw. Primarily it's intended for threading so that the tool can be removed, carriage returned to start, cross feed turned to stop, additional depth of cut with the compound. But it can be used as a stop for repetitive turning.


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