The following is an excerpt from “From Truth to Tools,” by Jim Tolpin and George Walker, illustrated by Andrea Love.
11 thoughts on “The Sector”
Comments are closed.
The following is an excerpt from “From Truth to Tools,” by Jim Tolpin and George Walker, illustrated by Andrea Love.
Comments are closed.
Perhaps when Brendan gets his new shop set up he might start making the again. Lets hope. His are really nice.
It’s easier to make sense of math when it shows practical applications, rather than just theoretical.
Analog computing. Nice.
Many years ago, in an engraving shop, I saw a large slide rule with vernier knob and magnifying lens, apparently an attempt to tease out one more digit’s worth of precision. Probably several decades too late to hope to find one of those at a price I can afford.
When was the pencil (or pencil sharpener) invented?
Ogg, after clubbing Ugg, invented the pencil to document his triumph on a cliff face. Some argue that Ugg was the first critic and was clubbed only after remarking on the cliff art.
And then a long time later: https://en.wikipedia.org/wiki/Pencil_sharpener
The email doesn’t display properly on a single screen I have to scroll from left to right to read it. Just thought you would like to know.
A question I’ve seen asked before, but not answered is if the lines of the sector originate at the center point of the hinge or at another location…
Asking for a friend =)
It seems at the center of the hinge, or point of swing. I offer this so that someone else could jump in and confirm or deny my answer. You can get the template from their website directly at this page, https://www.byhandandeye.com/product/580/, on George and Jim’s website. It will show you that the end point of the radius is right in the middle of the hole you punch for the pin.
The line of lines would originate at the pivot point of the sector.
Thank you. I needed the language you so well used to describe the starting point of both radii as lines of lines.
One thing I am curious about after using the device for several weeks, is what is the purpose/tradition behind having 13 divisions to the sector?