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Clever way of childproofing electrical outlets
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Alex Eisenhut:
Well at least until they learn about rotation...

https://www.ebay.ca/itm/293113379855
jmelson:
Check the photo of the back of the package.  This is before ZIP codes, so must be before 1963 or so.
Note the units won't work with 3-prong outlets or plugs, as the hot and neutral slots are not centered in the cover plate pattern.  These are almost certainly being sold as a collectible from yesteryear, not something for current use.

Jon
Alex Eisenhut:
Yes, I know... it screams the 1960s. But why did the concept fail? Must be easy to break or something.
I mean we went for decades with those plastic outlet covers, only recently did I start seeing the ones with the built-in shutters.
Having some sort of built-in external barrier seems reasonable, yet I've never seen it done.
Cerebus:

--- Quote from: Alex Eisenhut on June 07, 2021, 09:27:13 pm ---Yes, I know... it screams the 1960s. But why did the concept fail? Must be easy to break or something.
I mean we went for decades with those plastic outlet covers, only recently did I start seeing the ones with the built-in shutters.
Having some sort of built-in external barrier seems reasonable, yet I've never seen it done.

--- End quote ---

Really, only recently?  Shuttered sockets (with the shutters operated by the earth pin) have been the norm here in the UK since BS 1363 was initially introduced in 1947.
edpalmer42:
Yikes!

I looked up one of the patents listed.  The application date was 1946.  It was issued in 1950!

Damn!  That's older than me!

https://patents.google.com/patent/US2498642A/en
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