How to unstick center disk of round slide rule?
in [Design]
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From: Joerg on 20 Feb 2010 18:36 Jim Thompson wrote: > On Sat, 20 Feb 2010 13:03:04 -0800, Joerg <invalid(a)invalid.invalid> > wrote: > >> JeffM wrote: >>> Joerg wrote: >>>> They don't make'em no more. >>>> >>> The second-hand market? >>> http://google.com/froogle?scoring=p&q=intitle:circular-slide-rule >> >> But you easily end up with one that has the same issues. Those things >> don't seem to like California temperatures. > > Here's my round one, found behind books on the shelf... > > http://analog-innovations.com/SED/RoundSlideRule.png > That's a real antique. Amazing that the manufacturer wishes to remain incognito. > But my K+E "Slip Stick", found similarly... > > http://analog-innovations.com/SED/K+E_Slipstick.png > > didn't fare so well. In it's standard green leather case, unopened > for I'd guess at least 35 years,... the thin metal holding the > graticules has literally turned to dust :-( > If you are willing to drill out and re-install rivets it looks like this one could be salvaged. My small slip-stick has another problem, the melamine overlay or whatever material it is starts coming unglued from the wood. Have to fix it before it falls off completely. The slide-rule that held up best is the Aristo Scholar 0903VS. Good old Teutonian quality. Only the top of the cloth-clad cover got lost, probably during our last move. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Jim Thompson on 20 Feb 2010 18:45 On Sat, 20 Feb 2010 15:36:14 -0800, Joerg <invalid(a)invalid.invalid> wrote: >Jim Thompson wrote: >> On Sat, 20 Feb 2010 13:03:04 -0800, Joerg <invalid(a)invalid.invalid> >> wrote: >> >>> JeffM wrote: >>>> Joerg wrote: >>>>> They don't make'em no more. >>>>> >>>> The second-hand market? >>>> http://google.com/froogle?scoring=p&q=intitle:circular-slide-rule >>> >>> But you easily end up with one that has the same issues. Those things >>> don't seem to like California temperatures. >> >> Here's my round one, found behind books on the shelf... >> >> http://analog-innovations.com/SED/RoundSlideRule.png >> > >That's a real antique. I think I bought it in 1960 at the Harvard Coop >Amazing that the manufacturer wishes to remain >incognito. I was puzzling over that as well. But, IIRC, it's by Post. > > >> But my K+E "Slip Stick", found similarly... >> >> http://analog-innovations.com/SED/K+E_Slipstick.png >> >> didn't fare so well. In it's standard green leather case, unopened >> for I'd guess at least 35 years,... the thin metal holding the >> graticules has literally turned to dust :-( >> > >If you are willing to drill out and re-install rivets it looks like this >one could be salvaged. Yep. I was looking at it here. I wonder if the slider mechanism, as I recall its better days, something like spring steel, is still available? >My small slip-stick has another problem, the >melamine overlay or whatever material it is starts coming unglued from >the wood. Have to fix it before it falls off completely. > >The slide-rule that held up best is the Aristo Scholar 0903VS. Good old >Teutonian quality. Only the top of the cloth-clad cover got lost, >probably during our last move. I can't really see any use for them now, if you have a good calculator (*). I think I'll make a shadow box for my "antiques" ;-) (*) I have TI-60X and TI-83, use mostly the 60X. Why trouble yourself even with those when you have a simulator that can solve the most difficult of non-linear differential equations, over temperature, in seconds ?:-) ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
From: Joerg on 20 Feb 2010 18:57 Jim Thompson wrote: > On Sat, 20 Feb 2010 15:36:14 -0800, Joerg <invalid(a)invalid.invalid> > wrote: > >> Jim Thompson wrote: >>> On Sat, 20 Feb 2010 13:03:04 -0800, Joerg <invalid(a)invalid.invalid> >>> wrote: >>> >>>> JeffM wrote: >>>>> Joerg wrote: >>>>>> They don't make'em no more. >>>>>> >>>>> The second-hand market? >>>>> http://google.com/froogle?scoring=p&q=intitle:circular-slide-rule >>>> But you easily end up with one that has the same issues. Those things >>>> don't seem to like California temperatures. >>> Here's my round one, found behind books on the shelf... >>> >>> http://analog-innovations.com/SED/RoundSlideRule.png >>> >> That's a real antique. > > I think I bought it in 1960 at the Harvard Coop > >> Amazing that the manufacturer wishes to remain >> incognito. > > I was puzzling over that as well. But, IIRC, it's by Post. > >> >>> But my K+E "Slip Stick", found similarly... >>> >>> http://analog-innovations.com/SED/K+E_Slipstick.png >>> >>> didn't fare so well. In it's standard green leather case, unopened >>> for I'd guess at least 35 years,... the thin metal holding the >>> graticules has literally turned to dust :-( >>> >> If you are willing to drill out and re-install rivets it looks like this >> one could be salvaged. > > Yep. I was looking at it here. I wonder if the slider mechanism, as > I recall its better days, something like spring steel, is still > available? > I bet not. You'd have to have that made somewhere. Or kludge something and call it the Thompson edition. >> My small slip-stick has another problem, the >> melamine overlay or whatever material it is starts coming unglued from >> the wood. Have to fix it before it falls off completely. >> >> The slide-rule that held up best is the Aristo Scholar 0903VS. Good old >> Teutonian quality. Only the top of the cloth-clad cover got lost, >> probably during our last move. > > I can't really see any use for them now, if you have a good calculator > (*). I think I'll make a shadow box for my "antiques" ;-) > > (*) I have TI-60X and TI-83, use mostly the 60X. Why trouble yourself > even with those when you have a simulator that can solve the most > difficult of non-linear differential equations, over temperature, in > seconds ?:-) > Can be a problem, like when you are in a tight space in production, trying to figure out why some camera automation routine doesn't home in. That's when I really like the li'l HP11C. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Dave Platt on 20 Feb 2010 19:46 In article <ajs0o5lh28jhh3dlr4fo4dt285upg2elhb(a)4ax.com>, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> wrote: >>> Here's my round one, found behind books on the shelf... >>> >>> http://analog-innovations.com/SED/RoundSlideRule.png >>> >> >>That's a real antique. > >I think I bought it in 1960 at the Harvard Coop > >>Amazing that the manufacturer wishes to remain >>incognito. > >I was puzzling over that as well. But, IIRC, it's by Post. It's a Gilson "midget" 4-inch, by the look of it. These, and their 8-inch big brother "binary" rule, were made by Gilson (reportedly in Florida), and were sold by quite a few of the slide-rule companies under their own names including Post, Dietzgen, and Lietz. The sales material and manuals were often branded, but the rule itself was not. A Gilson Midget was my very first slide rule, back in 8th grade chemistry class (1968 or so, I think). A very nice little design, roughly equivalent in precision to a 10" linear rule, and at least as easy to use as a linear rule. Mine was stolen out of my high-school locker some years later, and I really regretted the loss. Finally bought a replacement via eBay a few years ago, and this got me started on collecting slide rules... I have a couple of dozen now, of various types and conditions. -- Dave Platt <dplatt(a)radagast.org> AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads!
From: Tauno Voipio on 21 Feb 2010 06:15
Joerg wrote: > Dave M wrote: >> Joerg wrote: >>> Gents, >>> >>> My round slide rule is developing a sticky center wheel. I can still >>> move it but afraid my thumbs will rub off the lettering over time. >>> It's this model: >>> >>> http://sliderulemuseum.com/SIC/C35_SIC_SINCO_250_1962.jpg >>> >>> Obviously the old "rub with a bar of soap" trick like on the linear >>> ones doesn't work here. I also haven't tried any semi-destructive >>> methods to pull it off. Any safe tricks to unstick it? >>> >>> I usually use the linear one but on the road this slide rule is nice >>> because it fits into the shirt pocket. >> >> >> If your slide rule has plastic-on-plastic ot plastic-on-metal, talcum >> powder should work. Disassemble to the point where the center can be >> cleaned with water/detergent solution, then dry completely and lube >> with dry talcum powder. >> > > Done, but as Jim hinted, if it's buckled it's too late. And mine is :-( > > So, scrape marks in the aluminum and the plastic wheel. Maybe if I could > find really thin Teflon I can get some more life out of it. They don't > make'em no more. > The old Nestler advice was silicone oil, but for slide rules on plastic base (not wooden). -- Tauno Voipio, MSEE of the slide rule age tauno voipio (at) iki fi |