Shuttersparks

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Tag: engineering

A New History Blog!

Relatively new on the Shuttersparks blog are the “On This Day” posts about important historical events in science and engineering. I started these here on my main blog but I see that these posts are going to drown out everything else. So, I’ve created a new blog just for these historical posts here: https://today.shuttersparks.net/

STS-125 Atlantis Solar Transit (200905120002HQ)

These photos are too cool not to post.

In this tightly cropped image, the NASA space shuttle Atlantis is seen in silhouette during solar transit, Tuesday, May 12, 2009, from Florida. This image was made before Atlantis and the crew of STS-125 had grappled the Hubble Space Telescope. Photo Credit: (NASA/Thierry Legault).

Originally uploaded by NASA HQ Photos. STS-125 Atlantis Solar Transit (200905120002HQ).

In this tightly cropped image, the NASA space shuttle Atlantis is seen in silhouette during solar transit, Tuesday, May 12, 2009, from Florida. This image was made before Atlantis and the crew of STS-125 had grappled the Hubble Space Telescope. Photo Credit: (NASA/Thierry Legault). Click to see larger.

Above photo, uncropped. Click to see larger.

The NASA space shuttle Atlantis and the Hubble Space Telescope are seen in silhouette, side by side in this solar transit image made at 12:17p.m. EDT, Wednesday, May 13, 2009, from west of Vero Beach, Florida. The two spaceships were at an altitude of 600 km and they zipped across the sun in only 0.8 seconds. Photo Credit: (NASA/Thierry Legault)

Above photo, uncropped. Click to see larger.

Thierry made this image using a solar-filtered Takahashi 5-inch refracting telescope and a Canon 5D Mark II digital camera. Photo Credit: (NASA/Thierry Legault)

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.

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