Unknown generator identification

Picked up this generator (dynamo) at the weekend as I have a small project in mind.
No names on the castings or box and the original nameplate has been removed! So not a lot to go on!
Ammeter is scaled 20-0-20 and inside the top box is a CAV regulator so it looks like it's for charging 12v batteries, well made with armature running on ball races.
Anyone recognise it at all?

Alan

It looks like part of a Jap 2A Generating set, it wouldn't have pulley

Maryalice

Thanks for your suggestion, I now have a direction to investigate. There seems to be measurable resistance where you would expect (6-8 ohms) so looks like it could be a worker.

Alan

Brief investigation and it seems it would be driven (directly) from a JAP 2A and used for aircraft battery charging and dates from the 40's
Photos of all the generators I found show a rheostat mounted under the ammeter and guess this one has been modified for some reason.

Alan

As above a generator from a WW2 generating set direct driven by a JAP 2A engine, all mounted on an angle iron frame with handles at either end. A lot of these generators were made by the Lancashire Dynamo & Crypto Co Ltd. The missing brass plate would probably have had LDC on it. Some information on this company can be found here: https://www.gracesguide.co.uk/Lancashire_Dynamo_and_Motor_Co

It looks like your control box has been modified with a vehicle regulator fitted to give 12 volts. There would have been an original regulator in place, plus a rheostat to control the field winding and a fuse box. The white thing on the front is not original either, but the meter and battery terminal posts are original

Thanks for info, it's obviously been got at for some reason! Further investigation revealed the regulator to have the remains of a wasp nest which according to the frame of it, it says 24 volt?
The actual generator appears electrically intact with .2 ohms between segments and 7 ohms on the field.

Alan

Bit of dismantling today revealed that I don't think it's ever been apart and was containing a lot of fibre's and dirt. Commutator and brushes in very good order although bearings are noisy. Doesn't look like the bearings grease nipples have ever been used as the inside bores appeared free of grease.
I was surprised at the bearings on this 1940's British generator as they are metric!

Alan

Lot's of stuff in the 1940's had metric bearings, there are quite a few in a Norman T300 engine for example.

Amazing, I thought that sort of period would have been the hayday of imperial! Learn something everyday.
Also learnt today that Wilko paint and varnish stripper is a bit naff! Spent a good bit of time removing the many layers of paint from one of the end castings so decided to get the paint stripper out - too mild to be effective so will mechanically remove the rest tomorrow.

Alan

If you do a Google search you will find that as far back as 1881 parliament was discussing the use of the metric system but left it to the individual to use it, 1965 was when the UK started to use it properly.

Maryalice

Incredible, never would've thought that!

Alan

Alanengine wrote:
Also learnt today that Wilko paint and varnish stripper is a bit naff!

Have had mixed results with Wilko stripper - seems to depend on type/age of paint.
Old school Nitromors used to be great but the powers that be banned the sale of Dichloromethane to Joe Public so these days it's not so good. At least the Wilko product is cheap so you can slap a load on.
(No affiliation to Wilko   )  I've used hot air gun on tinwork - outdoors of course!

Keep on scrubbing!

I use the stuff below, it's like Nitromors used to be be in the old days. Easily available on Fleabay.

Nice! Thank you.

Worth bearing in mind for any more stripping! I have found the Wilko does soften the paint (many layers) so have used it for the inaccessible areas!

Alan

Finally reassembled the generator, new bearings and it's as smooth as silk! It seems to 'motor' quite well but I have had no luck finding information/wiring for the CAV regulator. This is obviously not an original fitment but a later modification.
It's a CLRT9-1 24volt unit. Can anyone help with connection details?
[

Usually the regulator codes are common across manufacturers, so it might go something like this:

AMP - I don't know
B = Battery
E = Earth
L = Lights
F = dynamo field
D = dynamo
P = I don't know

Only a suggestion, what do others think ?