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-   -   Old engineering & mathmatics stuff... (http://forums.pelicanparts.com/off-topic-discussions/1076054-old-engineering-mathmatics-stuff.html)

1990C4S 09-17-2024 02:27 PM

^^ I think that's what I had. With a folding brown plastic cover...

I probably have it somewhere, but it died, I had two of them and neither one would work.

SpyderMike 09-17-2024 04:07 PM

Yep, mine is still intact:

http://forums.pelicanparts.com/uploa...1726617985.jpg

Scott Douglas 09-17-2024 04:18 PM

I found this in my drawer the other day. It recently died but I liked it enough to keep it around.
http://forums.pelicanparts.com/uploa...1726618648.JPG
http://forums.pelicanparts.com/uploa...1726618648.JPG

fanaudical 09-17-2024 04:55 PM

I still have my HP 42s. I run the Free-42 app on my tablet. I still have Excalibur 32-bit on my work computers...

CurtEgerer 09-17-2024 06:02 PM

Quote:

Originally Posted by mjohnson (Post 12322913)
Popped in this morning...

http://forums.pelicanparts.com/uploa...1726605731.jpg

And now I guess I should always learn to use one - I actually loved the fun exercises the ancient prof made us do in chemical thermodynamics, using numbers covering over 40 orders of magnitudes with fractional powers and other fun things, only in our heads or on at best a scratchpad just to get a good guess. Understanding exponents was critical, and we got pretty darn close!

I was at the Bradbury Science Museum a few months back with several other 911 drivers :cool: There's lots to see in there!

CurtEgerer 09-17-2024 06:06 PM

You guys with the dead calculators - try percussive maintenance. It's worked for me several times.

1990C4S 09-18-2024 05:35 AM

I'm actually sad that I don't have mine now. It's 50% nostalgia, 50% pathetic/why would you care.

I carried that little thing to school for years and used it all day long.

red-beard 09-19-2024 03:47 AM

Quote:

Originally Posted by CurtEgerer (Post 12323105)
You guys with the dead calculators - try percussive maintenance. It's worked for me several times.

No, I don't think that will do it

Tim Hancock 09-19-2024 04:54 AM

I still use this Radio Shack EC-4014 calculator nearly daily at work. The battery has been dead for many years but the solar still powers it on. I think this was a replacement for a lost calculator near the end of college days in the mid-late 80's. I used it for many years then at my old first machine design job and still use it to this day.

http://forums.pelicanparts.com/uploa...1726749798.jpg

http://forums.pelicanparts.com/uploa...1726749798.jpg

CurtEgerer 09-19-2024 05:49 PM

Quote:

Originally Posted by red-beard (Post 12323840)
No, I don't think that will do it

I'm only half kidding. It's worked for me on many cameras, watches, handheld video games and other electronics. Recently bought a race scanner and a handheld Garmin GPS at a garage sale. Neither worked. Until some percussive maintenance :D I have no idea why it works, but it occasionally does.

masraum 09-19-2024 08:37 PM

Quote:

Originally Posted by CurtEgerer (Post 12324342)
I'm only half kidding. It's worked for me on many cameras, watches, handheld video games and other electronics. Recently bought a race scanner and a handheld Garmin GPS at a garage sale. Neither worked. Until some percussive maintenance :D I have no idea why it works, but it occasionally does.

Clearly because you're the PPOT version of...

https://i.ebayimg.com/images/g/gIUAA...Lvs/s-l400.jpg


:D

TimT 11-05-2024 11:19 AM

I picked up one of my guitars from having a little spa type work, setup, frets polished.. noisy pots cleaned.. Got to talking with the owner about old tools and such... and since we hit it off he gave me a ruler that he got from an old timer who work at DuPont..

Interestingly it has a dimension correction for temp, however, it doesn't indicate the temp..

9/32in/ft on a 2 foot rule

http://forums.pelicanparts.com/uploa...1730837871.jpg


http://forums.pelicanparts.com/uploa...1730837871.jpg

masraum 11-05-2024 11:26 AM

Quote:

Originally Posted by TimT (Post 12352296)
I picked up one of my guitars from having a little spa type work, setup, frets polished.. noisy pots cleaned.. Got to talking with the owner about old tools and such... and since we hit it off he gave me a ruler that he got from an old timer who work at DuPont..

Interestingly it has a dimension correction for temp, however, it doesn't indicate the temp..

9/32in/ft on a 2 foot rule

http://forums.pelicanparts.com/uploa...1730837871.jpg


http://forums.pelicanparts.com/uploa...1730837871.jpg

Very cool, shrink rulers. I've seen a several for sale in the past couple/few months on an "old tool" sales group that I frequent. They are very interesting, although I suspect I'm unlikely to ever come up with a good reason to use one. Best thing that I could think of today would be if I could give someone one to use for a specific project on April 1st.

rwest 11-05-2024 12:08 PM

Here’s my Casio from HS. Would have been mid 80’s, so 40 years old! Still works fine, although the spline of the case has a split in it, the ribbon cable going between the sides is good.

http://forums.pelicanparts.com/uploa...1730840890.jpg

TimT 11-05-2024 01:36 PM

Also the rule I was just gifted has 10th of inches on one side, and 50ths on the other.. yet the temp correction is given as a fraction (32nds)

masraum 11-05-2024 02:23 PM

Quote:

Originally Posted by TimT (Post 12352362)
Also the rule I was just gifted has 10th of inches on one side, and 50ths on the other.. yet the temp correction is given as a fraction (32nds)

Interesting!

gwmac 11-05-2024 03:06 PM

Shrink rulers were used by pattern makers,

1990C4S 11-06-2024 09:16 AM

we used to eff around with people and give them shrink rulers without telling them. The other prank was to loan out the 'production' stopwatch. It looked like minutes/seconds but it was minutes and hundreds of minutes.

So 1:50 was actually 1M 30S. It made people panic about their machine cycle time.


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