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+--- Thread: HP Slide-Rule from 1971 (/thread-18444.html)
HP Slide-Rule from 1971 - Des Spillane - 06-07-2022 12:36 AM
Please see attached 2 pictures of a Hewlett Packard slide rule from 1971.
It has a HP product/part code of 5952-2516 but it is in fact made by the Perrygraf division Nashua Corp.
It works our Vector Impedance on one side and on the other side gives reactances of Capacitors and Inductors against frequency.
I obtained this SlideRule when I worked for HP New Zealand many moons ago and I carried on using it quite often to do fast workouts of Capactive Reactance for many years. It was faster than use a calc.
I have a suspicion this slide rule may have been supplied with one of the Instruments of the time.
So, is this piece of cardboard considered to be a HP calculator , or not ??
Regards: Des Spillane
RE: HP Slide-Rule from 1971 - Thomas Klemm - 06-07-2022 11:27 AM
There was an older thread with similar slide rules: Nice finding in a drawer.
Unfortunately the links to the pictures are broken.
I used the idea for a talk about PostScript I gave at the Allschwil Meeting 2018.
The picture is in the attached zip file: allschwil-meeting-2018.zip
But I upload it here as well:
RE: HP Slide-Rule from 1971 - BobVA - 06-08-2022 01:17 AM
It's clearly one of their later model calculators. You can tell from the unopenable, riveted construction. :-)
I love those special purpose slide rules...nice find and thanks for posting!
RE: HP Slide-Rule from 1971 - Ren - 06-08-2022 10:19 PM
(sigh!)
Now I want one for my slide-rule collection!
I'd be interested if someone were to make one, sort of like the circular slide-rule that fits in a CD jewel case.
RE: HP Slide-Rule from 1971 - jlovda - 08-15-2022 02:14 AM
Seems to be very similar in functionality to the Pickett Cleveland Electronics metal slide rule.
RE: HP Slide-Rule from 1971 - anetzer - 08-21-2022 09:00 AM
I see a whole new field of business opportunities for SwissMicros here...