My dad had a friend who was an electrical engineer in the mid-20th century, and inherited from him a bunch of paper calculators and slide rules used for various tasks. Partially because I'm a pack rat and partially because they have some cool graphics, I brought them along, thinking I would do something with them... some day.
Well, today is the day, and posting their pictures here is the something. Then I will see if a vintage shop is interested in their physical versions.
I don't have any particular commentary on these, or knowledge about what most of them were used for. Resistors, ohms, what have you. Sure, a couple of them are obvious, and others are not:
I find the human ingenuity in the making of these physical artifacts itself — with their sliders, grommets, die cuts, and various meaningful colors — the most interesting part.
2 comments:
I like the handlettering on the RCA wheel.
The decimal equivalents image looks like a sign at the Edison National Parks site.
I have a word wheel that belonged to Elaine’s mom — prefixes and suffixes. I will try to get a decent photo (it’s shiny plastic).
Yes, that hand-lettering on the RCA wheel is pretty neat (both literally and figuratively)! I look forward to a post about the prefixes and suffixes wheel.
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