I took drafting back in the 50’s. The typical attire of the science nerds back then included a pocket protector with about 6 pens, a pair of black thick plastic rim glasses, and a slide rule hanging from our belts. This guaranteed we would not be distracted by the girls in HS and University, thus could concentrate on our academic work and some essential (there were real sunspots back in that era) ham radio activity. Fast forward a few years when I was a new Physics teacher. It was an absolute necessity to have good slide rule proficiency back in the pre computer days. In my class room there was a large heavy (demonstration) slide rule hanging from just above the blackboard. The slide alone must have had a mass of 2 or 3 kg, and there were several finger holes drilled all the way through the slide.
Since I was a new young teacher, I wanted to impress my students with my great slide rule skills. So I did a demonstration of quickly working the slide rule. Part way through the problem I placed my finger through a hole and then very quickly moved the slide. My rapidly moving finger in the hole quickly approached the metal bars linking the upper and lower scales. I did not pull my finger out in time, and the heavy slide with it’s inertia smashed my finger into the metal end bars. The slide rule made a rather effective finger guillotine. I did not lose my finger, but it hurt for many days, and since I was a new teacher, I could not run outside and cry or say naughty words in front of the class. Also this was near the beginning of class, so I needed to keep my cool, and pretend that nothing had happened for the next half hour while I lectured with tears in my eyes. Cheers, Rick KL7CW
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