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Category: Projects / DIY / Crafts (Page 4 of 4)

Projects, Do it Yourself, and Crafts.

Switch Inventor Honored

After decades of controversy over inventorship, the inventor of the switch was recognized and honored at a recent awards banquet of the International Organization of Electrical Engineers. Professor Turnonanof (1871-1929) was posthumously awarded the Inventor of the Year Award and inducted into the IOEE Hall of Fame. The professor’s son, Clarence “Click” Turnonanof, was present to accept the awards and give a moving presentation of his father’s achievements.

In the early days, Turnonanof’s invention was embodied in an open frame style like this:

Knife switch.

Knife switch. Click to view larger.

Later, he developed a more advanced and miniaturized form of his famous invention:

Toggle switch.

Toggle switch. Click to view larger.

A spokesperson for the IOEE said that the organization was exploring the possibility of setting up a Turnonanof scholarship.

Refilling a Fountain Pen Ink Cartridge


As some of you know, I am a user of fountain pens. There are all sorts of fill mechanisms for fountain pens such as levers, pistons, converters, and cartridges. My usual method is to refill cartridges from bottled ink using a syringe.

From time to time, questions come up about how to refill cartridges so I decided to make a short video of the easy procedure.

I hope this was helpful. Please comment below if you have any questions.

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