Mystery tool/gauge

[Cruzatte]

Okay, this has stumped a tool and die maker, a machines, a machine set-up guy, and a few others...

My grandfather did a lot of woodworking at home,,, built lots of us kids wood toys and puzzles,,, as well as doing lots of other things with tools. Worked on machines at the local paper plants. He had quite the woodshop at home. He passed many years ago, but my uncle lived there until he passed a few months ago,,, so I never really went through the tools until now.
One of the things I found, and probably the only one I have no explanation for is this,,,,
View attachment 190015View attachment 190016View attachment 190017
The little brass numbers in the little circular windows move. The set closest to the pointy tip move when that tip is rotated. The others move with the turning of the little knobs on the side opposite them.

Anyone know what this is, what it's for, how it is used?

I don't know what its use is. But I can tell you that it has a way of aligning it. "Rechts" is German for right; "Links" is German for left. So this tool has a specific left/right orientation when in use.

The tool tip looks like a countersink. I've never seen anything like this.

 

[Brokennock]

If you continue to turn the shaft do the other numbers in the windows eventually change?

I don't know. I haven't turned it behind a few revolutions.
They turn with the knits on the back, so I am thinking maybe they calibrate and adjustment of the numbers turned by the point?

 

[hawkeye2]

The knobs on the back could be for returning the instrument to zero for the next use.

 

[Brokennock]

I thank everyone for their replies thus far.

A little back ground in case it helps.
My oldest uncle had access to the shop as well and I think he was a machines or did some kind of machine engineering.
Gramps was in the navy on a submarine at the end of WWII. Pacific theatre. He did bring some tools home, and some other stuff from Japan and other parts of the orient. Probably doesn't apply here.
He then worked on the machines at the paper mills in their part of the Massachusetts Berkshires.
Loved working with wood. Loved puzzles if all kinds.
Very handy and mechanical man,,,,,, I didn't get those genes...

 

[Ames]

Torque wrench for Slog Bitzco Fignuts.

 

[64Springer]

A tool refurbished by Hunter Biden.

To count Hookers and Blow.

 

[Davey Boy]

You could ask

Keith Rucker - VintageMachinery.org

 

[springfield art]

Range and depth setting device for torpedoes during WWII.

Nah.

 

[Brokennock]

You could ask

Keith Rucker - VintageMachinery.org

Thank you

 

[Brokennock]

Sometimes a random thought hits you hard....

Just popped randomly into my head.....

I bet Zonie would have known what it is

 

[smo]

It seems odd too me that the right & left numbers all add up too 9….

 

[TDM]

It seems odd too me that the right & left numbers all add up too 9….

View attachment 190149

Good catch SMO, I didn't notice that.

 

[Brokennock]

It seems odd too me that the right & left numbers all add up too 9….

View attachment 190149

I don't know that this always remains true once the tip is turned or the knows are turned to change the numbers that correlate to them.

 

[smo]

I was wondering the same thing…

 

[Dutch7]

Rechts- Right
Links - Left

Correct

 

[deerstalkert]

hand held tachometer . chisel point goes into the indent of a crankshaft.

 

[Pukka Bundook]

You don't stick it on the end of a shaft to find out the rotational speed do you?
My grandfather had one for setting shaft speed to get optimum working speed, but it looks different to this!
This was before tachometers were invented.

Seems we think alike, Deerstalkert!

 

[deerstalkert]

i have several dial type .

 

[Brokennock]

hand held tachometer . chisel point goes into the indent of a crankshaft.

Interesting.
Crankshaft of a what?
How does it work? As the numbers (at least in the windows closest to the point) would keep turning and I'd think be unreadable?

 

[hawkeye2]

Interesting.
Crankshaft of a what?
How does it work? As the numbers (at least in the windows closest to the point) would keep turning and I'd think be unreadable?

Any rotating shaft. Zero the instrument, apply to the shaft end and start a stopwatch. At the end of the interval disengage the tach and read the revolutions, do the math if necessary. 1,600 revolutions/60 seconds =1,600 RPM.