Tool Talk

What's-It Forum => What's-It Forum => Topic started by: Sudsy on June 30, 2018, 05:12:01 PM

Title: Odd calipers. I know what they are but I don't know what they are
Post by: Sudsy 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.

(http://www.stripersonline.com/surftalk/uploads/monthly_2018_06/20180630_164019_resized.thumb.jpg.2df1e48f5cdfd39411fdde9505cfe881.jpg)(http://www.stripersonline.com/surftalk/uploads/monthly_2018_06/20180630_164031_resized.thumb.jpg.ccfd766b419b3585937f6fa317317cca.jpg)(http://www.stripersonline.com/surftalk/uploads/monthly_2018_06/20180630_164038_resized.thumb.jpg.7c05cd0fc28107aafa46df385800e6c6.jpg)

Title: Re: Odd calipers. I know what they are but I don't know what they are
Post by: Northwoods on June 30, 2018, 07:11:12 PM

Curioser and curioser!

Title: Re: Odd calipers. I know what they are but I don't know what they are
Post by: turnnut 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.

Title: Re: Odd calipers. I know what they are but I don't know what they are
Post by: mvwcnews 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?

Title: Re: Odd calipers. I know what they are but I don't know what they are
Post by: Spartan-C on June 30, 2018, 09:02:40 PM

Poor mans micrometer. :cheesy:

Title: Re: Odd calipers. I know what they are but I don't know what they are
Post by: Sudsy 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.

Title: Re: Odd calipers. I know what they are but I don't know what they are
Post by: Sudsy on July 02, 2018, 01:09:57 PM

http://www.freepatentsonline.com/1365779.pdf