Quote:
Originally Posted by Lucien Nunes
What is the patent No. on the back?
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On the back is as follows:
U.K.PAT.577584/46
AND PENDING
I was also a bit surprised at it been 20 Amps, since I always thought an Immersion Switch from the dates some of the posters suggested would be more likely rated at 15 Amps.
I once came across two Wylex Standard Range Bakelite fuse covers (the brown type screwed to the front of the Wylex Bakelite fuse box with the wooden frame) with a yellow label inside each fuse cover stating the S.W.G of different size fuse wires. One cover had 5, 15 and 30 amp fuse wire S.W.G while the other had the same but also with 20 Amp fuse wire S.W.G - I thought this may have suggested the 20 Amp rating of circuit fuses and therefore probably other electrical accessories was a later development.
Regards