Wilsons Sandbox

>In a message dated 5/11/00 9:37:07 PM Pacific Daylight Time,

>writes:>

>Ray, this is probably more than you wanted.....

----- Original Message -----
From: PMS GB Ltd
To:
Cc: [unknown] ; [unknown] ;
[unknown]
Sent: Friday, May 19, 2000 6:06 PM
Subject: [mg-tabc] Re: Recent query re TB lights - late reply


> Message text written by INTERNET:TATERRY@aol.com
> >In a message dated 5/11/00 9:37:07 PM Pacific Daylight Time,
> spook01@home.com
> >writes: as the TB?? >>
> >Ray, this is probably more than you wanted.....
>
> Thanks Terry for the detail list of the Headlights used on various models
> you posted a bit ago, I can add some detail on the TABC LB140 lamps
> however, as things aint quite as simple as may seem, and bore the list
with
> minute detail yet again! Sorry! But here goes......
>
> Never mind that the TA had solenoid dip on one lamp, the TB just had one
> light just go out(!!!), the TC had one double dipping bulb and the TC EXU
> two dipping bulbs, and no doubt there are other wiring diagram versions
> about as well -
>
> The TC LB140 headlights differed from the TA/B LB140 in a number of ways -
> As far as I know the following facts are correct:-
>
> 1. Firstly that the TA and TB units were the same all through except for
> the differences in the dipping mechanism of the reflectors - TA - one
light
> on permanent dip, the other a solenoid - TB one dipped, the other main
beam
> just went out.
>
> 2. Lucas Badge was recessed flush into the body of the Post War TC
> lights, but not so on the TA/TB pre war units where it stood slightly
above
> the body,
>
> 3. Then, of course the TA TB units have a screw to close the rim onto the
> body - the TC has a spring clip - the bodies and rims being different to
> cater for the two fitting types. Did very early TCs possibly use old
stock
> TA/TB units with screw fitting rims? Maybe not as DBL 606 the demonstrator
> TC and I think a very early car - seems to have spring clip fittings and
> the flatter glass.
>
> 4. Also the variety of lens glasses and rims used:-
>
> The TA/TB had Flattish, Horseshoe patterned lens, deep curved rim edges,
> and screw fitting o the body.
>
> Early TCs had the TA/TB style Flat Horseshoe pattern glass lens and rim
too
> but seem to have spring clips so must have different rim, and a different
> hole in the body of the light. The Lucas name and part number appeared on
> the top-rear of the outer rim, it was not visible when the glass was
> installed. Lens outside diameter is 7 7/8".
>
> A Deeply Domed Horseshoe pattern lens was then available from Lucas later
> (when?) and this used a different rim section to adapt to the glass
radius.
> After TC1850 they switched to Deep Domed Cats Eye lenses. Remember, the
> headlight rim that the lens is mounted in changed shape at the edge
> depending on if it was to conform to a flat or deep dished lens. For a
flat
> glass it has a full curve - for a deep domed lens it does not turn over
> nearly so much.
>
> The LATE TC after #1850 had the Deep Domed, CATS EYE pattern. This lens
> originally had "LUCAS" spelt in small letters in a vertical line ( about
> 3/4" long ) in the center of the lens. Later After Martket versions of
> this lens had the same Cats Eye pattern but the "LUCAS" was now in larger
> print horizontally across the center of the lens inside a clear circle
> about 1 3/8" diameter.
>
> Many laterly converted lights use Lucas #553435 adaptor rims for smaller
> sealed beam 8" units
>
> So just nip out and check that your lights are to original
specification!!!
>
> Clive Sherriff
>
> Oxford UK
>
>
>

On Fri, 19 May 2000, PMS GB Ltd wrote:

> Never mind that the TA had solenoid dip on one lamp, the TB just had one
> light just go out(!!!), the TC had one double dipping bulb and the TC EXU
> two dipping bulbs, and no doubt there are other wiring diagram versions
> about as well -

You were describing variants of the Lucas LB140 headlight, but the
TC/EXU didn't use that model. Instead it used a smaller type similar to
that of the the early chrome-headlight TD, fitted with US-style 7 inch
sealed-beam bulbs. I don't have the Lucas model number handy, but I'm
sure someone else here can provide it.

> Many laterly converted lights use Lucas #553435 adaptor rims for
> smaller sealed beam 8" units

That should be 7 inch, not 8 inch. Typo?

--
Chip Old 1948 M.G. TC TC6710 XPAG7430 NEMGTR #2271
Cub Hill, Maryland 1962 Triumph TR4 CT3154LO CT3479E
fold@bcpl.net