Please post the image # yoooooou are referring to! This never ending thread is almost worthless without the image reference.
Ingersoll-Rand ER-1 straight line compressor. Circa 1939.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...r_fullsize.jpg
New plans added on 10/09: Click here for 2,501 plans for homemade tools.
baja (Nov 19, 2019)
I didn't see it in a quick scan of the description. Patents sure where sorter back then, mine is a LOT longer after the lawyer spiced it up.
https://patents.google.com/patent/US1481211A/en
Odd thing, the patent expired TODAY!
baja (Nov 19, 2019)
Fullsize image: https://diqn32j8nouaz.cloudfront.net...s_fullsize.jpgA man-sized machine and a man-sized job are effectively handled by 21-year-old Virginia Grochowski of Milwaukee, Wisconsin. Employed by a Midwest supercharger plant, this former hosiery mill worker operates these giant drill presses as expertly as any man. Allis Chalmers Manufacture Company. October 1942.
New plans added on 10/09: Click here for 2,501 plans for homemade tools.
jimfols (Dec 23, 2019), ranald (Dec 23, 2019), Seedtick (Dec 23, 2019), Toolmaker51 (Dec 23, 2019)
Knew that machine tool instantly. NATCO Multi-Spindle Drill Press, common to run 21 spindles. Close spacing would use RH and LH bits for a compact gear train. The head descends to pre-set stops, varied depths accomplished via individual toolholders. Despite ungainly size, an efficient production machine from Indiana.
And believe it or not still sought after.
Last edited by Toolmaker51; Dec 23, 2019 at 06:25 PM.
Sincerely,
Toolmaker51
...we'll learn more by wandering than searching...
greyhoundollie (Dec 23, 2019), Jon (Dec 23, 2019)
Toolmaker51 (Dec 23, 2019)
I appreciate that. I don't get too much toolwork in these days, so compensation is in form of historical and topical comments.
And worst fabricated quips ever.
I noticed between Ms. Grochowski's brace of NATCO's, another woman runs a single spindle on what might be a box jig. Her machine might be an Edlund, Avey, Ettco; doesn't matter. They and others built a tremendous variety based on box column versus round. You've never drilled until you lay hands on such a machine. My favorite are Cleereman, and Fosdick.
Last edited by Toolmaker51; Dec 23, 2019 at 08:44 PM.
Sincerely,
Toolmaker51
...we'll learn more by wandering than searching...
Toolmaker51 (Dec 23, 2019)
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