The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Topic Options
Rate This Topic
#165279 - 06/24/07 08:04 PM Old Bayonet Adaptor & Plug (UK)
Webmaster Offline

Administrator
Member

Registered: 10/07/00
Posts: 3142
Loc: NY, USA
 Quote:
I have a variation of Trumpy's bayonet adaptor, designed to convert the bayonet to a 5amp two pin socket. There are the remnants of a retention cord, so I think it was originally attached to a mating plug. The appliance could thus be used in a wall socket or light socket as available.
The other pictures show a CLIX plug, using springy brass cotter pins as connecting pins and also to attach the flex. The serrations inside the cover do "click" over the heads of the cotters as it is screwed down. The natural spring of the cotter pins ensures a good tight mating in a socket; and a lot better contact than some modern plug/socket arrangements I've encountered ! I consider this a particularly ingenious piece of design for its age.
I'm guessing they date from about 1930 (?).

- Geoff








Top
Super Rod Cable Installation Tools

Super Rod Cable Rod System
Super Rod Cable Rod System -
Voted
Best Product of the Last 50 Years by members of NICEIC

#165287 - 06/25/07 02:41 AM Re: Old Bayonet Adaptor & Plug (UK) [Re: Webmaster]
LarryC Offline
Member

Registered: 07/05/04
Posts: 776
Loc: Winchester, NH, US
[quote=Webmaster]
 Quote:
There are the remnants of a retention cord...


What is a Retention cord in American English?

Thanks.

Larry C

Top
#165295 - 06/25/07 07:17 AM Re: Old Bayonet Adaptor & Plug (UK) [Re: LarryC]
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
The cord was just used to tie the adapter to the plug/electrical cord to keep it from getting lost.

You could then just ignore the adapter and insert the plug straight into a wall outlet, or couple it up to the adapter and plug into a lighting pendant from the ceiling.

On that 5A plug, I remember having a lot of those around at my grandparents' house in the the 1970s. I'm not sure when the design first appeared, but I think they were probably still being made in the 1940s.

Top
#165574 - 06/30/07 02:55 PM Re: Old Bayonet Adaptor & Plug (UK) [Re: pauluk]
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8540
Loc: SI,New Zealand
Paul,
Now there is a device I've never thought existed.
The lampholder contacts on the top of the adaptor look like brass screws.
I would imagine that any cord you used on the plug would have to be reasonably light to prevent the plug from falling out of the socket due to the wieght of the cord?.
_________________________
Let's face it, these days if you're not young, you're old - Red Green grin

Top
#165595 - 07/01/07 05:37 AM Re: Old Bayonet Adaptor & Plug (UK) [Re: Trumpy]
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
 Originally Posted By: Trumpy
The lampholder contacts on the top of the adaptor look like brass screws.


They are. It was a common arrangement on these adapters. Some had a slightly different arrangement in which the contacts were a flat head (sometimes hex shaped) set into the recess, then the screws to secure them went in from the sleeves of the 5A socket.

 Quote:
I would imagine that any cord you used on the plug would have to be reasonably light


Maybe if the plug contacts closed up (or the sleeves in the socket opened out), but the old 5A plugs can be a surprisingly tight fit.

The "splayed out cotter pin" style prongs of the plug pictured always used to hold very firmly.

Top
#166346 - 07/18/07 12:50 PM Re: Old Bayonet Adaptor & Plug (UK) [Re: pauluk]
Kenbo Offline
Member

Registered: 04/07/06
Posts: 234
Loc: Scotland
I just remember these things from the 70s

My mother standing in the middle of the kitchen doing the ironing pluged into the light pendant . Then I would get hell for flicking the light switch off as I leave the room. (No neon indicators in those days)

Iron and plug 1950s
_________________________
der Gro├čvater

Top
#168855 - 09/18/07 09:24 AM Re: Old Bayonet Adaptor & Plug (UK) [Re: Kenbo]
SvenNYC Offline
Member

Registered: 08/19/02
Posts: 1685
Loc: New York City
They were made by Ediswan. I have a bunch of those lying around that I got from a guy in the UK, along with three lampholder adapters.

And yes, the string is to hold the plug and the adapter together so you wouldn't loose them. In fact, one of the sets still is tied together with its little piece of rope.





Edited by SvenNYC (09/18/07 09:25 AM)

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals