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#164171 - 05/26/07 05:16 PM Old Lighting Adapter  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,211
SI,New Zealand
Here is something I found when I was moving house that I never knew I still owned.
It's a switched double lamp adapter, these were pretty common here in NZ in the earlier days of domestic electricity supply:

[Linked Image]

As well, there was a small plug that fits into the light socket and you can run a 2 core flex to another light or small appliance, if the need arises:

[Linked Image]

The two side by side, for size comparison:

[Linked Image]

These devices were banned in the early 1980's here, mainly because of people lashing up all sorts of wierd looking installations, usually in home workshops.
The plug itself was banned because it could not ensure that the polarity would be correct every time it was connected, also there was no earth contact.




Tools for Electricians:

#164190 - 05/27/07 09:46 AM Re: Old Lighting Adapter [Re: Trumpy]  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
I notice it's stamped "Made in England," and in fact I can't place the manufacturer but the styling is very familiar.

These adapters were very common here at one time too, to allow a lighting outlet to be used to feed a radio or -- very commonly -- a portable electric iron.

Three-core flexes with the green wire just stripped back and left hanging outside the bayonet plug were all too frequent, unfortunately.


#164211 - 05/28/07 12:37 AM Re: Old Lighting Adapter [Re: pauluk]  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,211
SI,New Zealand
Just a little question here,
Bakelite, it it able to be moulded(sp??) or are all the bits machined from a block?.
Paul,
Yeah the same thing here used to happen here, as well as the odd adapter with two or three cords coming out of them, they were nasty things as far as DIY "improvisation" went.


Let's face it, these days if you're not young, you're old - Red Green grin

#164223 - 05/28/07 01:02 PM Re: Old Lighting Adapter [Re: Trumpy]  
classicsat  Offline
Member
Joined: Nov 2002
Posts: 456
Bakelite is moulded. It is made as liquid, poured into a mould, and cured to a solid.


#164451 - 06/03/07 08:08 PM Re: Old Lighting Adapter [Re: Trumpy]  
aussie240  Offline
Member
Joined: Jul 2005
Posts: 223
Blue Mountains, NSW, Australia
Quote
The plug itself was banned

I've seen various references to the non compliance of using bayonet plugs for appliances in the past but wasn't aware of any attempt to ban them...they would still be required for DIY pendant light fittings. I'm fairly sure I've seen HPM bayonet plugs for sale of late...or have they gone the way of piggyback plugs?
Actually, if an appliance is properly designed it should be able to work safely with either polarity....the lack of earth is still a problem though...I've seen (and used) bayonet to 3 pin socket adaptors where no other source of power has been available.
As for the bayonet double adaptor, I've often used them simply to run two light bulbs with the advantage if one burns out you've still got light.


#164459 - 06/03/07 11:24 PM Re: Old Lighting Adapter [Re: aussie240]  
32VAC  Offline
Member
Joined: Jun 2004
Posts: 202
Alice Springs, NT, Australia
Originally Posted by aussie240
Quote
The plug itself was banned

I've seen various references to the non compliance of using bayonet plugs for appliances in the past but wasn't aware of any attempt to ban them...they would still be required for DIY pendant light fittings. I'm fairly sure I've seen HPM bayonet plugs for sale of late...or have they gone the way of piggyback plugs?


Clipsal still produce the bayonet adaptor
http://updates.clipsal.com/ClipsalOnline/ProductInformation.aspx?CatNo=466&ref=


#164485 - 06/04/07 05:46 PM Re: Old Lighting Adapter [Re: 32VAC]  
Alan Belson  Offline
Member
Joined: Mar 2005
Posts: 1,803
Mayenne N. France
I think 'Bakelite', invented by Belgian-American Dr Leo Baekeland, was molded as a powder, originally with a woodflour-filler added to the phenol-formaldehyde mix. The high pressure / heat process required has made it uneconomic in competition with the more easily molded thermoplastics.
BTW it sets to polyoxybenzylmethyleneglycolanhydride!

Alan


Wood work but can't!

#164508 - 06/04/07 08:28 PM Re: Old Lighting Adapter [Re: Alan Belson]  
Retired_Helper  Offline
Member
Joined: Mar 2007
Posts: 165
Maine
Also, the compression-molded plastics like phenolic and urea tended to come out of the molds with varying degrees of sharp-edged flash. This necessitated moving the parts to and from cleaning operations that are not necessary with the injection-molded parts.


#164524 - 06/05/07 08:02 AM Re: Old Lighting Adapter [Re: Retired_Helper]  
Alan Belson  Offline
Member
Joined: Mar 2005
Posts: 1,803
Mayenne N. France
The base materials are very aggressive chemicals. That, and the technique of grinding up the sprues and other wastes for 'filler' material, caused dermatitis in factory workers, and worse.
High pressure is required as the reaction is barely controllable and produces volumes of gasses as the cure proceeds. Bakelite does not melt, it is 'thermo-setting', probably the first true commercial plastic.
Needless to say, trawl the net and sure enough our bretheren in India and China are making artifacts with it still.

I seem to remember when Ma plugged in her electric iron, our unit had a switch built in to turn off/on the side outlet.

Alan.


Wood work but can't!


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