Thank you for your video @ 5:40 showing how to find the Area of a Circle given its Radius. If you set 1 on the CF Scale under 8.56 on the DF Scale, then you can perform multiplication such as for finding the Volume of a Cylinder which is the Area of the Circle multiplied by its Height. For example, 8.56 x 2 = 17.1 is the Volume of a Cylinder with a Height of 2. And so forth for finding the Volume of a Cylinder for any other Height.
I’ve been working my way through the instruction manual for my Dad’s Dietzgen Multiplex Dec Trig Log Log slide rule (circa 1950) which I inherited. A lot more fun than I thought it would be, ingenious really. I found the manual online. I saw one of those Decilon slide rules with leather case for $35 plus shipping on Facebook marketplace. I was very tempted.
Regarding 2:24 Keuffel and Esser’s Deci-Lon slide rules were not made from PVC plastic (Polyvinyl Chloride). Instead they were made from Ivorite which is Acrylonitrile Butadiene Styrene (ABS) plastic also known by its brand name Cycolac.
@@MattMcIrvin You are correct. Lego bricks are indeed made from ABS plastic. ABS (Acrylonitrile Butadiene Styrene) was good material to make modern plastic slide rules. On the other hand, PVC (Polyvinyl Chloride) is used to make such products as phonograph records, plastic pipes, siding for houses, window frames, flooring, etc.
Thank you for your video. Regarding 2:35, the remedy for plastic slide rules that tend to stick is to apply a few droplets of silicone oil as a lubricant into the groove and the tenon of the sliding contact surfaces. Silicone oil is safe to use on plastic, because silicone lubricant does not deteriorate the plastic. Other people may prefer to use a small amount of PTFE (Teflon) dry lubricant. On the other hand, it is not recommended to use petroleum distillates on plastic slide rules.
"ES" = "Eye Strain" Ha! The Yellow Picketts make my eyes hurt, and their scale layouts make my brain hurt. K+E all the way. Your video persuaded me to finally get that Deci-Lon I've been wanting. Very happy with it.
@@jkneathery !00% agreement . Calculators lead automatically to ignorance of the subject and laziness .I first learnt about logs and slide rules in grade 7 in England . That is a perfect age ,you are right,and teaches much better understanding .
I was in the last cadre (I suppose) who learned the slide rule in high school. I never lost my fascination and today have a collection of about forty rules. I recently gave a nice duplex to a friend with two PhDs who had never seen a slide rule, with an instruction book. Your Deci-Lon video is excellent. I also have the Deci-Point, which tracks the decimal point. I'm not very skilled and need to use the instructions to get anywhere. Are you able to expand on the use of this intriguing slide rule?
@@jkneathery Thank you, Jim. I'm going to look for one to add to my small collection. I say collection not as a hobby for collecting a bunch, but for the enjoyment.
Can you tell me how a Gilson/Atlas spiral slide rule works? I can multiply and divide with just the D scale, but I don't understand how the spiral C scale works. I saw a site that did mention it, but it wasn't detailed enough.
Just use the D and DI scales for reciprocals. The scales are adjacent and on the same side of the rule. No flipping and more accurate.Try it. Find 5 on DI. Note it isadjacent to 2 or .20 on the D scale.
Excellent video. Just started getting into these. Deci-lon is also one of my favorites.
Thanks for the refresher!
Thank you for your video @ 5:40 showing how to find the Area of a Circle given its Radius. If you set 1 on the CF Scale under 8.56 on the DF Scale, then you can perform multiplication such as for finding the Volume of a Cylinder which is the Area of the Circle multiplied by its Height. For example, 8.56 x 2 = 17.1 is the Volume of a Cylinder with a Height of 2. And so forth for finding the Volume of a Cylinder for any other Height.
I’ve been working my way through the instruction manual for my Dad’s Dietzgen Multiplex Dec Trig Log Log slide rule (circa 1950) which I inherited. A lot more fun than I thought it would be, ingenious really.
I found the manual online.
I saw one of those Decilon slide rules with leather case for $35 plus shipping on Facebook marketplace. I was very tempted.
Regarding 2:24 Keuffel and Esser’s Deci-Lon slide rules were not made from PVC plastic (Polyvinyl Chloride). Instead they were made from Ivorite which is Acrylonitrile Butadiene Styrene (ABS) plastic also known by its brand name Cycolac.
ABS is what Lego bricks are made from, right? It seems to lend itself to tight-tolerance precision engineering.
@@MattMcIrvin You are correct. Lego bricks are indeed made from ABS plastic. ABS (Acrylonitrile Butadiene Styrene) was good material to make modern plastic slide rules. On the other hand, PVC (Polyvinyl Chloride) is used to make such products as phonograph records, plastic pipes, siding for houses, window frames, flooring, etc.
Thank you for your video. Regarding 2:35, the remedy for plastic slide rules that tend to stick is to apply a few droplets of silicone oil as a lubricant into the groove and the tenon of the sliding contact surfaces. Silicone oil is safe to use on plastic, because silicone lubricant does not deteriorate the plastic. Other people may prefer to use a small amount of PTFE (Teflon) dry lubricant. On the other hand, it is not recommended to use petroleum distillates on plastic slide rules.
I use molybdenum disulfide powder.
I inherited my dads versalog 1460 and always wanted to learn it Thanks for sharing. A hobby/skill worth knowing...
"ES" = "Eye Strain" Ha!
The Yellow Picketts make my eyes hurt, and their scale layouts make my brain hurt.
K+E all the way.
Your video persuaded me to finally get that Deci-Lon I've been wanting. Very happy with it.
1000 Clowns juvenile comment
A very good well explained video Jim on an instrument that I believe should STILL. be taught in school . HAVE we progressed I think not . .
738polarbear thanks for your comment. Yes, teaching with a slide rule would bring math alive for young students. Perhaps starting in 7-8th grade.
@@jkneathery !00% agreement . Calculators lead automatically to ignorance of the subject and laziness .I first learnt about logs and slide rules in grade 7 in England . That is a perfect age ,you are right,and teaches much better understanding .
I was in the last cadre (I suppose) who learned the slide rule in high school. I never lost my fascination and today have a collection of about forty rules. I recently gave a nice duplex to a friend with two PhDs who had never seen a slide rule, with an instruction book. Your Deci-Lon video is excellent. I also have the Deci-Point, which tracks the decimal point. I'm not very skilled and need to use the instructions to get anywhere. Are you able to expand on the use of this intriguing slide rule?
Is this the 68-1100 model??
Very helpful video. I’m enjoying all your slide rule videos; much appreciation for posting.
Yes, the Deci-Lon is the 68-1100
@@jkneathery Thank you, Jim. I'm going to look for one to add to my small collection. I say collection not as a hobby for collecting a bunch, but for the enjoyment.
Can you tell me how a Gilson/Atlas spiral slide rule works? I can multiply and divide with just the D scale, but I don't understand how the spiral C scale works. I saw a site that did mention it, but it wasn't detailed enough.
I have never owned or used a spiral scale SR. But now I am curious to find one.
See the following link:
public.beuth-hochschule.de/~hamann/sliderules/atlas1.html
A more detailed example in this link:
www.encoreconsulting.com.au/sr/eximiusdiu.html#make
Just use the D and DI scales for reciprocals. The scales are adjacent and on the same side of the rule. No flipping and more accurate.Try it. Find 5 on DI. Note it isadjacent to 2 or .20 on the D scale.
AVENDRE: J'ai 140 règles de calcul tout neuf N°57/88-Reitz-N-Etudiant & N°57/89-ETUDIANT LOG LOG.Fabrication allemagne en 1965.
These are $200 NOW on ebay
You can find them for $25 in good condition because they were common. Don't be in a hurry to pay $200. You drive up the price for us all!
Debería traducir en español