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Author Topic: Odd calipers. I know what they are but I don't know what they are  (Read 2027 times)

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Offline Sudsy

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Odd calipers. I know what they are but I don't know what they are
« on: June 30, 2018, 05:12:01 PM »
I just finished rehabbing these odd little calipers -
About 4 1/2" long

No idea what were for or how to read em - anyone here have any ideas ?

Made by Grove Mfg. Co. of Dayton, Ohio
All I could find anywhere was this one line:

The 1922 edition of Engineering Directory lists Grove Mfg. Co. of Dayton as the maker of "Grove Indicating" brand calipers.

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Offline Northwoods

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Re: Odd calipers. I know what they are but I don't know what they are
« Reply #1 on: June 30, 2018, 07:11:12 PM »
Curioser and curioser!
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The ORIGINAL Northwoods.

Offline turnnut

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Re: Odd calipers. I know what they are but I don't know what they are
« Reply #2 on: June 30, 2018, 08:34:17 PM »
 if you set t on zero, what is the ID measurement ?

 same on the 4 on both ends.
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Offline mvwcnews

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Re: Odd calipers. I know what they are but I don't know what they are
« Reply #3 on: June 30, 2018, 08:38:49 PM »
( https://books.google.com/books/content?id=NohNAAAAYAAJ&pg=PA82&img=1&zoom=3&hl=en&sig=ACfU3U3GUXwpIZgY82d2d9hsyC02pjE8iQ&ci=10%2C712%2C469%2C779&edge=0 )  Sept. 1918 MACHINERY write-up for the tool, with an illustration of how it could be used.
P.S. Found the patent #1,365,779 which will soon be in DATAMP -- can I use your photo of the tool for that entry?
« Last Edit: June 30, 2018, 08:45:42 PM by mvwcnews »
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Offline Spartan-C

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Re: Odd calipers. I know what they are but I don't know what they are
« Reply #4 on: June 30, 2018, 09:02:40 PM »
Poor mans micrometer. :cheesy:
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Ken

Offline Sudsy

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Re: Odd calipers. I know what they are but I don't know what they are
« Reply #5 on: July 02, 2018, 12:47:48 PM »
Quote from: mvwcnews on June 30, 2018, 08:38:49 PM
can I use your photo of the tool for that entry?

Of course

And here's how I read that ad (I'm far from an engineer so i could be wrong)
OK, I just read it over again, here's what i got from the ad - It's a tool used to accurately measure an inside measurement. It's used in conjunction with a micrometer to match a pin to a hole.
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Offline Sudsy

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Re: Odd calipers. I know what they are but I don't know what they are
« Reply #6 on: July 02, 2018, 01:09:57 PM »
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