Home Up | Contact Legal Stuff |
Black Gem |
The Gem adder, or Golden Gem as it was sometimes labeled, is small, portable, and very nice to use. It can only add, but it does this extremely well: you insert a stylus in the chain at the right digit and slide it all the way down, and the result register at the top increments to add your digit; carry is handled automatically thanks to the internal gearing. This may seem trivial, but at the time there were countless small adders in use -- slide adders and the Locke Adder, for example -- that required you to handle the carry manually. It also has a clearing mechanism, which some of the others lack, and a nice folding support to prop it at the right angle. On top of which, it is simply well constructed: |
From a communication by his granddaughter, Ms. Christina Oorebeek, I learned that Mr.
Gancher was a Russian Jew who had fled the pogroms of approx. 1880 to come to America when he was 18
years old. The story in the family went that he'd arrived penniless in New York City and did very well
with his inventions. He was also a small-handwriting specialist and had, apparently, procured himself a
place in Ripley's Believe it or Not by writing the Bill of Rights on a postage stamp! Good job, Mr. Gancher! Today we have better calculating solutions, but had I been living in 1904, I would have bought your creation without hesitation! |
Exhibit provenance: eBay, of course... More info: |
||
Home | HOC | Fractals | Miscellany | About | Contact Copyright © 2007 N. Zeldes. All rights reserved. |