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Unusual Go-No Go Tool?

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Martin King 209/08/2021 18:50:07
864 forum posts
365 photos

Hi all,

This little item was in the bottom of a crate of tooling we just got, I think it is incomplete but would love to know its specific use? Turning the end moves the pointer along the scale marked "Micrographs"

gonog 1.jpg

gonogo 2.jpg

Cheers, Martin

Michael Gilligan09/08/2021 19:34:25
avatar
18992 forum posts
945 photos

I wonder if ‘Micrographs’ might be the manufacturer, rather than the scale.

MichaelG.

old mart09/08/2021 20:31:57
3349 forum posts
208 photos

It is obviously made to fit in a coat pocket along with pens. What happens at the buisiness end when the scale is moved?

Martin King 209/08/2021 22:42:14
864 forum posts
365 photos

Nothing seems to happe when the end cap is turned, as I said it looks incomplete?

Martin

DC31k10/08/2021 06:13:53
578 forum posts
1 photos

The scale on it is non-linear (perhaps logarithmic), so that eliminates a vast amount of possible applications and opens up other possibilities.

Chris Kirby 113/08/2021 07:28:14
6 forum posts

Almost looks like some sort of sighting/viewing device on top. Look through the small hole and align something within the rectangular part?

Martin Connelly13/08/2021 08:16:23
avatar
1901 forum posts
205 photos

I wonder if the scale is logarithmic, it is clearly not a linear scale but I wonder if it is a sine/cosine/tangent curve. Is there a spring in the tool?

Martin C

Michael Gilligan13/08/2021 08:57:28
avatar
18992 forum posts
945 photos

Here’s a first stab at calibrating that scale

.

c7ec1551-aa96-4568-a436-fdfd83b7979f.jpeg

.

Now you can all try curve-fitting, whilst I go out for the day

MichaelG.

Edited By Michael Gilligan on 13/08/2021 09:01:01

Martin Connelly13/08/2021 16:35:06
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1901 forum posts
205 photos

If you add 60 to each scale point you get close to a logarithmic progression. The deviation may be due to small errors in the numbers for the scale due to it being measured from a photo.

Martin C

Martin King 213/08/2021 17:36:19
864 forum posts
365 photos

All waaay over my head! sad!

Are we saying that the tool might be complete?

Martin

Martin King 213/08/2021 17:45:39
864 forum posts
365 photos

No spring that i can see but there does appear to be a kind of small window by the clip and as one winds the end knob a sloping point moves back and forth in the window. window is quite murky and discolored so not easy to see.

Hers a pretty ropy pic:

gonogo 3.jpg

Michael Gilligan13/08/2021 22:16:44
avatar
18992 forum posts
945 photos

With considerably less confidence … I have inserted values for most of the sub-divisions

.

5e3851fd-db17-4a04-a2b2-f757c5403dd6.jpeg

.

If anyone wants to play; please feel free to offer corrections and/or curve-fitting

MichaelG.

.

Edit: __ This looks pretty good to me; but I still don't know what it’s for sad 

.

abf93ec2-c3ab-4508-b2d1-4f70b6dd35e0.jpeg

Edited By Michael Gilligan on 13/08/2021 22:24:22

SillyOldDuffer14/08/2021 09:47:34
Moderator
7573 forum posts
1681 photos

The non-linear scale implies the gauge is for measuring intensity rather than a physical dimension, and the peep hole and squared top suggest a simple optical assembly is missing.

As the instrument is a pocket tool, it's used by someone walking about. The peep hole suggests she eyeballs the target. Sound and light, hence heat, are perceived by humans on a logarithmic scale. I think it's for judging the temperature of a furnace or flame for making glass, normalising steel, welding, or melting without boiling etc. Possibly confirming a lighting system is performing to specification.

Any sign of anything mechanical missing at the top? If it's a visual intensity gauge I'd expect the control wheel to adjust an aperture between the peep hole and the lens carrier, now lost.

Dave

Martin King 214/08/2021 11:06:29
864 forum posts
365 photos

Hi All,

Thanks for the helpful comments.

Does anyone want it? FOC and free postage!

Cheers, Martin

Michael Gilligan14/08/2021 11:10:37
avatar
18992 forum posts
945 photos
Posted by Martin King 2 on 14/08/2021 11:06:29:

Hi All,

Thanks for the helpful comments.

Does anyone want it? FOC and free postage!

Cheers, Martin

.

I would love to explore it further, Martin

MichaelG.

Martin King 214/08/2021 11:41:58
864 forum posts
365 photos

Hi Michael,

It will be in the post to you on Monday morning. Please email me your address again as I seem to have mislaid it! blush

Cheers, Martin

pgk pgk14/08/2021 13:25:33
2324 forum posts
293 photos

SOD,

I was speculating that the square held the base of a tool that was snapped into place into your 'aperture'. Something like fixed and sprung divider arms as a quick sizing of some tiny items for consistency...
The attachment would be kept in a separate pouch.
But since evidently the arms are easily bent it's an odd choice of design for any real accuracy.

pgk

Steviegtr14/08/2021 18:04:20
avatar
2244 forum posts
311 photos

Never mind. I am sure Michael will google it to death & surprise us all with it's use. Mnn.???.

Steve.

Michael Gilligan14/08/2021 18:31:15
avatar
18992 forum posts
945 photos
Posted by Steviegtr on 14/08/2021 18:04:20:

Never mind. I am sure Michael will google it to death & surprise us all with it's use. Mnn.???.

Steve.

.

Sorry Steve,but it has to be said :

I am sick of people assuming that I just 'Google' everything.

What I wrote was :

"I would love to explore it further"

... and you will see that I have already put quite a lot into the exploration.

PLEASE just give it a rest

MichaelG.

Steviegtr14/08/2021 23:21:24
avatar
2244 forum posts
311 photos
Posted by Michael Gilligan on 14/08/2021 18:31:15:
Posted by Steviegtr on 14/08/2021 18:04:20:

Never mind. I am sure Michael will google it to death & surprise us all with it's use. Mnn.???.

Steve.

.

Sorry Steve,but it has to be said :

I am sick of people assuming that I just 'Google' everything.

What I wrote was :

"I would love to explore it further"

... and you will see that I have already put quite a lot into the exploration.

PLEASE just give it a rest

MichaelG.

Michael you have taken my post completely out of context. I was praising you for finding things that we rarely do. I always read your posts with great interest. If i seemed to offend it was not meant that way.

Steve.

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