How to unstick center disk of round slide rule?
in [Design]
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From: JosephKK on 22 Feb 2010 02:49 On Fri, 19 Feb 2010 18:41:54 -0800, Joerg <invalid(a)invalid.invalid> 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. Business opportunity? Reproduction (functional) for collectors at corresponding prices.
From: JosephKK on 22 Feb 2010 03:03 On Sat, 20 Feb 2010 15:29:32 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> 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 > >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 :-( > > ...Jim Thompson K+E Geez, only the backside? Looks alot like a Log Log Decitrig.
From: MK on 22 Feb 2010 03:36 "Joerg" <invalid(a)invalid.invalid> wrote in message news:7u8t7eFgi2U1(a)mid.individual.net... > 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. > > -- > Regards, Joerg > > http://www.analogconsultants.com/ > > "gmail" domain blocked because of excessive spam. > Use another domain or send PM. > Buy a calculator - been around more than 30 years now - some of them pretty good. Mine's an HP32S which works in RPN so has enough obscurity factor to put off casual borrowers ! Michael Kellett
From: JosephKK on 22 Feb 2010 04:58 On Sat, 20 Feb 2010 13:05:25 -0800, Joerg <invalid(a)invalid.invalid> wrote: >Robert Baer 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 you can gently wash it with mild soap and water, then dry it, that >> should do the job. >> But if that is not sufficient, one can add a drop or two of Labelle >> plastic compatible gear oil (used by model railroaders and other modelers). >> 40 years ago i got a 14.9ml bottle of it and a only half way thru it. > > >Ah, another trick. Thanks, didn't know about the oil. Washing did not >work, didn't do a thing. Perhaps it got rid of the old oils, which may have become gummy.
From: Jim Thompson on 22 Feb 2010 09:36
On Mon, 22 Feb 2010 00:03:32 -0800, "JosephKK"<quiettechblue(a)yahoo.com> wrote: >On Sat, 20 Feb 2010 15:29:32 -0700, Jim Thompson <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com> 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 >> >>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 :-( >> >> ...Jim Thompson > >K+E Geez, only the backside? Looks alot like a Log Log Decitrig. Yep. Bought it in 1956. ...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. |