Author Topic: Slide rules!  (Read 116 times)

Offline lloydsp

  • CNC Jedi
  • *****
  • Posts: 8449
    • View Profile
Slide rules!
« on: July 24, 2021, 19:17:33 pm »
'Still cleaning out the barn attic, and I found a box with FIVE slide rules I used all through college.  Four still work fine.  One all-aluminum one is jammed, but can probably be repaired.

I'm going to make up a picture frame with the little 6-inch 'pocket model' Starrett that says,  (bed router job, so in the 'art')

"In case of total failure of electronics, Break Glass.  Pull slide and cursor."

<smile>

Lloyd
« Last Edit: July 24, 2021, 21:20:38 pm by lloydsp »
"Pyro for Fun and Profit for More Than Fifty Years"

Offline airnocker

  • CNC Jedi
  • *****
  • Posts: 560
    • View Profile
Re: Slide rules!
« Reply #1 on: July 24, 2021, 22:50:37 pm »
I thought it was "pull slide and curse".  ;D
airnocker

Everything depends on everything else

Offline lloydsp

  • CNC Jedi
  • *****
  • Posts: 8449
    • View Profile
Re: Slide rules!
« Reply #2 on: July 24, 2021, 23:07:48 pm »
Heh!  I never cussed mine!  They got me through college physics with no issues.

We didn't have electronic calculators, back then.  I built (from scratch) my first '4-banger' (add, subtract, multiply, divide, 8-digits) in my senior year.

Lloyd
« Last Edit: July 24, 2021, 23:10:02 pm by lloydsp »
"Pyro for Fun and Profit for More Than Fifty Years"

Offline airnocker

  • CNC Jedi
  • *****
  • Posts: 560
    • View Profile
Re: Slide rules!
« Reply #3 on: July 25, 2021, 00:28:18 am »
(I meant "electronics failure" and having to re-compute)

Mine always slide, no problem, no batteries.  My first calculator was an HP-35 from mid '70s or so, still have it, still works.
« Last Edit: July 25, 2021, 01:04:08 am by airnocker »
airnocker

Everything depends on everything else

Offline EddyCurrent

  • CNC Jedi
  • *****
  • Posts: 4739
    • View Profile
Re: Slide rules!
« Reply #4 on: July 25, 2021, 18:40:20 pm »
Lloyd, good find, I'd like a good ratch about in that attic (if needed, https://www.cumbriandictionary.co.uk/#R)

At school we used log tables, at college we used mechanical calculators and slide rules.
I still have a circular slide rule but mostly used a linear type.
I also have a collection of electronic calculators starting with a "Sinclair Cambridge type 2" from 1973
The one I use almost every day is a Casio fx-82SX from 1996
Made in England

Offline lloydsp

  • CNC Jedi
  • *****
  • Posts: 8449
    • View Profile
Re: Slide rules!
« Reply #5 on: July 25, 2021, 19:02:45 pm »
"Sinclair Cambridge type 2" from 1973?"

0000000000

Oh, my goodness!  I owned one (long gone).

Lloyd
"Pyro for Fun and Profit for More Than Fifty Years"

Offline airnocker

  • CNC Jedi
  • *****
  • Posts: 560
    • View Profile
Re: Slide rules!
« Reply #6 on: July 25, 2021, 22:24:23 pm »
Eddy, you are the first person I've run across that used a mechanical calculator.  In my plane surveying class in college we used mechanical calculators to solve the related math and trig problems.
airnocker

Everything depends on everything else

Offline Bob La Londe

  • CNC Jedi
  • *****
  • Posts: 4117
  • ^ 8.5 pounds on my own hand poured bait.
    • View Profile
    • CNC Molds N Stuff
Re: Slide rules!
« Reply #7 on: July 25, 2021, 23:13:25 pm »
I pulled out my old slide rule the other day, but it didn't work at all.  New batteries didn't help. 
Getting started on CNC?  In or passing through my area?
If I have the time I'll be glad to show you a little in my shop. 

Some Stuff I Make with CamBam
http://www.CNCMOLDS.com

Offline Bubba

  • CNC Jedi
  • *****
  • Posts: 3145
    • View Profile
Re: Slide rules!
« Reply #8 on: July 25, 2021, 23:57:39 pm »
I pulled out my old slide rule the other day, but it didn't work at all.  New batteries didn't help.

Because you don't need it anymore. ;D ;D
My 2ยข

Win10 (64 bit, CB(1.0)rc 1(64 bit) Mach3, ESS, G540, Endurance Laser.

Offline lloydsp

  • CNC Jedi
  • *****
  • Posts: 8449
    • View Profile
Re: Slide rules!
« Reply #9 on: July 26, 2021, 00:16:16 am »
I need MINE!  The power WILL fail here (sometimes for a week or more, during 'storm season').  If the calculator batteries fail, the slide rule will do!

I've already re-practiced some use of it, and still have left to explore the log functions.

Lloyd
"Pyro for Fun and Profit for More Than Fifty Years"

Offline airnocker

  • CNC Jedi
  • *****
  • Posts: 560
    • View Profile
Re: Slide rules!
« Reply #10 on: July 26, 2021, 00:20:59 am »
(My slide rule is to always do it feet first)   ;D ;D ;D
airnocker

Everything depends on everything else