Here’s a new topic bound to start a controversy.
When did the humble little plastic tire valve stem cap first
hit the market?
Did our XK’s originally have metal valve stem caps?
If so, brass or chrome plated?
What markings, Dunlop, Schraeder, or none?
Does anyone have an original spare tire or a red Dunlop tube
with the original cap?–
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
The JCNA Rule Book, Chapter 5, Para c9d: Pre-60’s Jaguars should have metal
valve caps. Logo valve caps must be shown to have been authentic Jaguar
Cars accessory.
Pat H.-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
Rob Reilly
Sent: Wednesday, March 26, 2014 12:06 PM
To: xk@jag-lovers.org
Subject: [xk] Tyre Valve Stem Caps
Here’s a new topic bound to start a controversy.
When did the humble little plastic tire valve stem cap first hit the market?
Did our XK’s originally have metal valve stem caps?
If so, brass or chrome plated?
What markings, Dunlop, Schraeder, or none?
Does anyone have an original spare tire or a red Dunlop tube with the
original cap?
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0 --Posted using
Jag-lovers JagFORUM [forums.jag-lovers.org]–
Rob,
Here is another data point. My 1957 XK-150 has the black plastic caps as
shown here:
http://www.jag-lovers.org/v.htm?1395857599
There is a possibility/certainty that these are tyre dealer replacements in
1959. I would like to see what the metal caps looked like.
Gene McGough
XK-150 FHC S834515DN
XJ6C II 1976----- Original Message -----
From: “Pat & Nancy Harmon” jphar@bellsouth.net
Sent: Wednesday, March 26, 2014 3:38 PM
The JCNA Rule Book, Chapter 5, Para c9d: Pre-60’s Jaguars should have
metal
valve caps. Logo valve caps must be shown to have been authentic Jaguar
Cars accessory.Pat H.
-----Original Message-----
From: owner-xk@jag-lovers.org On Behalf Of Rob Reilly
Sent: Wednesday, March 26, 2014 12:06 PMHere’s a new topic bound to start a controversy.
When did the humble little plastic tire valve stem cap first hit the
market?
Did our XK’s originally have metal valve stem caps?
If so, brass or chrome plated?
What markings, Dunlop, Schraeder, or none?
Does anyone have an original spare tire or a red Dunlop tube with the
original cap?XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0 --Posted using
Jag-lovers JagFORUM [forums.jag-lovers.org]–
The spare for my very low mileage (22,000 miles) 1954 120 ots has never
been on the ground- the tire still has the rubber nubs in the tread. It has
a red Dunlop tube and the valve stem cap is as shown in these photos-
black plastic with the word Schrader as in the photos.
Bob McAnelly
t
In a message dated 3/26/2014 5:24:06 P.M. Central Daylight Time,
genemc@cavemen.net writes:
http://www.jag-lovers.org/v.htm?1395857599
Bob, what is your chassis number? Steve-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
Jagdad11@aol.com
Sent: Wednesday, March 26, 2014 4:34 PM
To: xk@jag-lovers.org
Subject: Re: [xk] Tyre Valve Stem Caps
The spare for my very low mileage (22,000 miles) 1954 120 ots has never
been on the ground- the tire still has the rubber nubs in the tread. It
has
a red Dunlop tube and the valve stem cap is as shown in these photos-
black plastic with the word Schrader as in the photos.
Bob McAnelly
t
In a message dated 3/26/2014 5:24:06 P.M. Central Daylight Time,
genemc@cavemen.net writes:
http://www.jag-lovers.org/v.htm?1395857599
In reply to a message from Steve Kennedy sent Wed 26 Mar 2014:
From my ‘C’ type parts book…it indicates the valve caps are
supplied by Schrader…NOW! Schrader manufactured caps
worldwide…and the country of manufacture is stamped on the cap…in
the case of UK manufacture they are marked ‘GtB’ often quite
indistinctly…it can appear to read GtR. So… be it proposed that
the correct cap for the 120 is a metal cap marked ‘Schrader GtB’ on
the lower rim. QED.–
godfrey
pender island bc, Canada
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
Hi Steve: S676395. pretty close to the end.
Regards, Bob McAnelly
In a message dated 3/26/2014 6:25:08 P.M. Central Daylight Time,
skennedy@ecentral.com writes:
Bob, what is your chassis number? Steve-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf
Of
@Jagdad11
Sent: Wednesday, March 26, 2014 4:34 PM
To: xk@jag-lovers.org
Subject: Re: [xk] Tyre Valve Stem Caps
The spare for my very low mileage (22,000 miles) 1954 120 ots has never
been on the ground- the tire still has the rubber nubs in the tread. It
has
a red Dunlop tube and the valve stem cap is as shown in these photos-
black plastic with the word Schrader as in the photos.
Bob McAnelly
t
In a message dated 3/26/2014 5:24:06 P.M. Central Daylight Time,
genemc@cavemen.net writes:
http://www.jag-lovers.org/v.htm?1395857599
So a bit of a mystery to me.
I think you will be hard pressed to find any better physical evidence of
Gene’s 1957/9 original PLASTIC Schrader Tyre Valve Stem caps, and especially
with Bob’s untouched 1954 Spare-Tyre/Tube and Schrader Valve Stem cap being
the same black-plastic CAP.
But I have three SCHRADER Catalogues - 1952 GB, 1961 GB and one from
Schrader USA that dates at about 1955/6.
These are all very comprehensive catalogues of 24/32 pages and each devote a
couple pages detailing their VALVE CAPS.
But the 1952 catalogue only details TWO different CAPS for car use, and a
third heavy duty cap for Truck use - and ALL are METAL with SCHRADER stamped
around the bottom-edge circumference.
-
DOME TYPE - sold in metal-boxes of five (7572) or bulk for Repair shops
(8297) -
SLOTTED TYPE - sold in metal-boxes of five (6300) or bulk (880).
The 1955/6 USA catalogue includes these two, but adds two more light-weight
- still metal - versions, but does have REG US PATENTS stamped on them as
well, so probably not relevant to this thread.
The 1961 GB catalogue still lists the same 1. and 2. above from the 1952 GB
catalogue, but now identifies the Dome Type as being a No.7960MB (so maybe
there is a subtle internal difference (given both photographs look to be the
same), with the SLOTTED TYPE still a 880MB (and looks same in photos)
But also two new CAPS. Both are supplied in small Metal Boxes of five,
thus the MB suffix.
-
A SLOTTED type similar to 2. but of lighter construction with a standard
type sealing rubber - a No.6300MB -
And a DOME TYPE incorporating a swivelling sealing unit - a 935MB.
Both 3. and 4. are still metal with SCHRADER stamped around lower perimeter,
but look quite different to their 1. and 2. counterparts.
Bulk supplies now have same Catalogue Number, but a V suffix rather than the
MB suffix (Metal Box of 5)
BUT, no mention in either 1952 or 1961 Catalogues of a black-rubber valve
cap.
I still don’t think you can discount Gene’s or Bob’s totally reliable 1954/7
evidence, so maybe it’s a case of the black-plastic SCHRADER marked caps
being introduced after 1952 and discontinued before 1961 - totally feasible.
Roger Payne - XK140MC OTS; E-Type 4.2 S.1 OTS; DSV8.
Canberra.-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
Steve Kennedy
Sent: Thursday, 27 March 2014 10:24 AM
To: xk@jag-lovers.org
Subject: RE: [xk] Tyre Valve Stem Caps
Bob, what is your chassis number? Steve
-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
Jagdad11@aol.com
Sent: Wednesday, March 26, 2014 4:34 PM
To: xk@jag-lovers.org
Subject: Re: [xk] Tyre Valve Stem Caps
The spare for my very low mileage (22,000 miles) 1954 120 ots has never
been on the ground- the tire still has the rubber nubs in the tread. It
has
a red Dunlop tube and the valve stem cap is as shown in these photos-
black plastic with the word Schrader as in the photos.
Bob McAnelly
t
In a message dated 3/26/2014 5:24:06 P.M. Central Daylight Time,
genemc@cavemen.net writes:
http://www.jag-lovers.org/v.htm?1395857599
In reply to a message from Roger Payne sent Wed 26 Mar 2014:
Thanks, guys.
Pat, I knew about the JCNA rule, and accepted it when I
wrote the Mark V Judging Guide, which I hope will appear
later this year, but then I got to wondering about it.
I have a red Dunlop tube that came to me on 679187 with a
black plastic Schrader cap exactly like Gene’s. However, it
was in a Firestone tire so the provenance is not clean and I
would hesitate to claim anything.
The caps are not listed separately in the factory parts
catalogs; presumably you would get one with a tube purchase.
Roger, is there anything in your Schrader catalogs about
tubes? What do you think of the idea that Schrader sold
plastic caps and valves to Dunlop, but with the public only
sold the upgrade metal caps, didn’t bother with the plastic
since Dunlop already had the market by supplying the caps
with their tubes?–
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
Nope Rob,
The SCHRADER catalogues don’t mention TUBES as they did not actually make
tubes.
They do however most definitely list TYRE VALVES as a replacement for
damaged/tyre valves.
I am talking about the entire rubber covered assembly with a rubber mounting
flange that is vulcanised onto the tube during its construction, so that
does beggar the question, did SCHRADER supply tyre-valves to tube
manufacturers such as DUNLOP or did the tube manufacturers make their own
tyre-valve and then just use the Schrader CORES and VALVE CAPS.
The Schrader complete TYRE-VALVES have the word ‘Schrader’ moulded into the
mounting flange so can be easily identified with any old original tubes, but
even my 1952 Catalogue shows these to be of black rubber and not red.
The catalogue does list a huge variety of Tyre Valves for car, truck,
tractor, motorcycle application, both those vulcanised to an inner tube (as
used by Jaguar) as well as those affixed to the wheel, and also offers a KIT
for repairing damaged valves/tubes.
Everything I have says both TYRES and TUBES used by Jaguar in 1940s/50s was
made/supplied by DUNLOP, and although I strongly suspect/think Schrader
supplied both the VALVE-CORES and VALVE CAPS (being part of their Valve
sealing responsibility) I think it improbable that they would have supplied
complete VALVES. Hard to know - maybe they did supply as a special
arrangement to Dunlop the internal brass threaded component of the VALVE as
well, and Dunlop then did their own rubber moulding/vulcanising work using
all Schrader metal components.
May be a guessed explanation for ‘cheap’ black-plastic caps being part of a
huge volume/cheapest price supply deal to Dunlop, leaving the “better” metal
caps for after-market supply where Schrader was appealing to a more fussy
direct customer.
Maybe Schrader USA offered a similar deal to FIRESTONE as Schrader-UK
offered to DUNLOP. Will have to look out for Schrader-Australia doing
something similar with OLYMPIC.
What does your Firestone tubes VALVE look like - any sign of Schrader
lettering?
Roger Payne - XK140MC OTS; E-Type 4.2 S.1 OTS; DSV8.
Canberra.-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
Rob Reilly
Sent: Saturday, 29 March 2014 4:35 AM
To: xk@jag-lovers.org
Subject: RE: [xk] Tyre Valve Stem Caps
In reply to a message from Roger Payne sent Wed 26 Mar 2014:
Thanks, guys.
Pat, I knew about the JCNA rule, and accepted it when I
wrote the Mark V Judging Guide, which I hope will appear
later this year, but then I got to wondering about it.
I have a red Dunlop tube that came to me on 679187 with a
black plastic Schrader cap exactly like Gene’s. However, it
was in a Firestone tire so the provenance is not clean and I
would hesitate to claim anything.
The caps are not listed separately in the factory parts
catalogs; presumably you would get one with a tube purchase.
Roger, is there anything in your Schrader catalogs about
tubes? What do you think of the idea that Schrader sold
plastic caps and valves to Dunlop, but with the public only
sold the upgrade metal caps, didn’t bother with the plastic
since Dunlop already had the market by supplying the caps
with their tubes?
–
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
In reply to a message from Roger Payne sent Fri 28 Mar 2014:
I love this forum. Here I popped off an idle speculation,
and Roger’s response opens up a whole new vista of thought.
Black rubber valve stems on red rubber tubes. I have three
of them. They were on my 120 when I bought it, so it seems
likely they are original to the car, though it had Firestone
tires. I also found one of them had a different style of
Schrader plastic cap, pointy like a bullet.
I wonder how they made these tubes. Did they blow mold the
red tube first, and then stick the black stem on afterwards?
Just for entertainment, I also have a box of metal Schrader
caps I got from my wife’s father, who was controller of
Sears Roebuck’s automotive department in the 1960’s.
http://www.jag-lovers.org/snaps/snap_view.php3?id=1396061523--
The original message included these comments:
I am talking about the entire rubber covered assembly with a rubber mounting
flange that is vulcanised onto the tube during its construction, so that
does beggar the question, did SCHRADER supply tyre-valves to tube
manufacturers such as DUNLOP or did the tube manufacturers make their own
tyre-valve and then just use the Schrader CORES and VALVE CAPS.
The Schrader complete TYRE-VALVES have the word ‘Schrader’ moulded into the
mounting flange so can be easily identified with any old original tubes, but
even my 1952 Catalogue shows these to be of black rubber and not red.
–
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
In reply to a message from Rob Reilly sent Sat 29 Mar 2014:
I suspect that the valve cap situation demonstrates
perfectly the Second of Thermodynamics that was inflicted
on us in school. Any one who has watched an old fashioned
inner tube tire being patched is familiar with the filling
station ( remember them) practice of taking off the cap and
taking out the valve and setting is aside while they
repaired the tube, and then reassembling the thing after
the patch was applied. At my favorite place, there was a
small painted wooded shelf right next to the tube testing
tank upon which the parts were placed and that shelf held
spares, I am quite certain that on occasion the mechanic
would reach for the parts to put them back and happen to
pick up the ‘‘wrong’’ one - after all, Charles will verify
that inner tube patch guys were not obsessed with whether
they might be causing mischief for a bunch of old fuddy
duddies fifty years later trying to figure out what their
valve caps did not match. Voila !
Karl–
karl
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
In reply to a message from Rob Reilly sent Sat 29 Mar 2014:
Rob
Hang on to those caps they will be worth their weight in
gold soon. I feel a possible rule change coming on ;0).
Since you still have all your original tubes, you got room
for my original interior parts at your place?
Right now it’s in garbage bags which is a step in the
right direction.–
Dan Cusick 1994 xjs 4.0L 1951 xk120 ots 2010 XF
Peru, Illinois, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
Rob R;
I have (in my “original spares” box) a red, white and blue
box for the Schrader Valves. The box is in VG to Exc
condition, but only has one valve in the box… I’ll try to dig
it out this week-end (lotsa honey-do’s!) and post a picture
to the J-L Photo Album…
Now, I know the Minor Replacement Outfit spares did not
list these valves, but I wonder if they might of been “tossed in”
at delivery of the XK?? Or did the original owner just purchase
them “OTC”?
Also, my one red Dunlop tube (sans valve stem cap) is
like your three… red tube carcass but a solid black valve
stem… Are the exposed parts of your valve stems painted?
Charles #677556.
http://xktx.org----- Original Message -----
From: “Rob Reilly”
I love this forum. Here I popped off an idle speculation,
and Roger’s response opens up a whole new vista of thought.
Black rubber valve stems on red rubber tubes. I have three
of them. They were on my 120 when I bought it, so it seems
likely they are original to the car, though it had Firestone
tires. I also found one of them had a different style of
Schrader plastic cap, pointy like a bullet.
I wonder how they made these tubes. Did they blow mold the
red tube first, and then stick the black stem on afterwards?Just for entertainment, I also have a box of metal Schrader
caps I got from my wife’s father, who was controller of
Sears Roebuck’s automotive department in the 1960’s.http://www.jag-lovers.org/snaps/snap_view.php3?id=1396061523
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
Hell, Karl, 99.9% of the time the local tyre changing guys
would NOT even put the valve stem caps BACK ON at all!!
I had to tell them… and then they found the rattiest caps in
their collection… Before I started fixing/mounting my own
tyres, I’d remove the caps and leave them home.
Charles #677556.
http://xktx.org----- Original Message -----
From: “karl”
… At my favorite place, there was a
small painted wooded shelf right next to the tube testing
tank upon which the parts were placed and that shelf held
spares, I am quite certain that on occasion the mechanic
would reach for the parts to put them back and happen to
pick up the ‘‘wrong’’ one - after all, Charles will verify
that inner tube patch guys were not obsessed with whether
they might be causing mischief for a bunch of old fuddy
duddies fifty years later trying to figure out what their
valve caps did not match. Voila !Karl
Original Tubes! Do they still have the original air in them too?-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
Dan Cusick
Sent: Saturday, March 29, 2014 10:52 AM
To: xk@jag-lovers.org
Subject: RE: [xk] Tyre Valve Stem Caps
In reply to a message from Rob Reilly sent Sat 29 Mar 2014:
Rob
Hang on to those caps they will be worth their weight in gold soon. I feel a
possible rule change coming on ;0).
Since you still have all your original tubes, you got room for my original
interior parts at your place?
Right now it’s in garbage bags which is a step in the
right direction.
–
Dan Cusick 1994 xjs 4.0L 1951 xk120 ots 2010 XF
Peru, Illinois, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
From what I have been able to ascertain SCHRADER was an American Company
that patented their SCHRADER VALVE in the late 1800s, and then basically
developed a monopoly on air-valves used on all pneumatic tyres whether car,
truck, motorcycle or bicycle. There were other designs/brands in the early
days but nothing ever challenged the SCHRADER monopoly.
SCHRADER, apart from having their main factory in USA, also put in factories
in UK and Australia - and I dare say other countries to manufacture/supply
local demand for the patented SCHRADER range of products - VALVES, VALVE
CORES, VALVE STEMS, VALVE CAPS of a huge range of variations to suit all
pneumatic tyre applications.
In a JAGUAR context, SCHRADER UK factory would clearly have supplied VALVES
etc to DUNLOP with DUNLOP incorporating the SCHRADER product in their
wheels, tyres and tubes as appropriate, but in XK era, surely only VALVES,
VALVE CORES and VALVE CAPS.
A relevant association is we all know that in an SS and Jaguar Tool-Kit we
get a small brass VALVE CORE EXTRACTOR TOOL - pre-war and immediate postwar
variants of this tool are actually stamped DUNLOP and not SCHRADER as may
have been guessed. (This is what first got me looking for SCHRADER
catalogues to see if they ever listed this TOOL - they don’t)
But as previous posting, clearly there had to be some demarcation between
SCHRADER and DUNLOP over exactly what SCHRADER did supply to DUNLOP for
Dunlop to then build into their tubes. I am sure this would have all been
very clearly agreed as to supply/responsibility.
I am guessing (in the absence of any first hand proof) that SCHRADER would
have supplied the complete VALVE assembly - so the brass threaded stem
vulcanised within a rubber housing with its rubber mounting platform, the
matching threaded VALVE CORE and the matching VALVE CAP - and then Dunlop
would have vulcanised this VALVE ASSEMBLY onto their rubber tubes.
My catalogues only show what was available for spare-parts-retail sales, but
typically a company like SCHRADER would have had contracted arrangements
with I suspect ALL the tyre/tube manufacturers (given their virtual 100%
monopoly)that may have included supply of items not retail available.
Thus I don’t discount the BLACK-PLASTIC VALVE CAPS possibly being
original-equipment supply, even though only metal CAPS are shown in retail
catalogues.
But also note that in the RETAIL catalogues it is clear that most items are
marked not just SCHRADER but also with country of factory made, and most
certainly I have a lot of VALVE CAPS stamped SCHRADER AUST.
Which brings me to the SMALL TINS that SCHRADER sold VALVE CORES and VALVE
CAPS in sets of five.
These are also marked, or in this case printed with the country of
manufacture.
One small tin I have in hand for VALVE CORES interestingly has on it MADE IN
AUSTRALIA along one edge, but along other edge UK VALVE PAT No.337652,
suggesting that the SCHRADER AUSTRALIA factory was a subsidiary of SCHRADER
UK and not the parent SCHRADER USA. This was common with many automotive
fcatories in Australia, as back in 1920s-50s Australia gave very
preferential trade/tarrif protection to UK industry as part of the
COMMONWEALTH arrangements that was not enjoyed by non-Commonwealth countries
like USA.
But apart from having USA, ENGLAND or AUSTRALIA on components and tins, I
seem to notice that the colouring of the USA tins was different to the
ENGLAND/AUSTRALA tins.
This is only a quick observation as I am sure there were age variations as
well, but USA tins seem to be BLUE dominant and ENGLAND/AUSTRALIA tins the
same and RED dominant.
I see these tins regularly at local swap meets, usually empty, but over the
years have picked up a few still full of CORES or CAPS - but have to say,
never really checked to see if AUSTRALIA (most likely) made or if there is
also ENGLAND made to be found. Will add to my swap-meet shopping list!
Roger Payne - XK140MC OTS; E-Type 4.2 S.1 OTS; DSV8.
Canberra.-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
cb@XKTX.Org
Sent: Sunday, 30 March 2014 4:57 AM
To: xk@jag-lovers.org
Subject: Re: [xk] Tyre Valve Stem Caps
Rob R;
I have (in my “original spares” box) a red, white and blue
box for the Schrader Valves. The box is in VG to Exc
condition, but only has one valve in the box… I’ll try to dig
it out this week-end (lotsa honey-do’s!) and post a picture
to the J-L Photo Album…
Now, I know the Minor Replacement Outfit spares did not
list these valves, but I wonder if they might of been “tossed in”
at delivery of the XK?? Or did the original owner just purchase
them “OTC”?
Also, my one red Dunlop tube (sans valve stem cap) is
like your three… red tube carcass but a solid black valve
stem… Are the exposed parts of your valve stems painted?
Charles #677556.
http://xktx.org
----- Original Message -----
From: “Rob Reilly”
I love this forum. Here I popped off an idle speculation,
and Roger’s response opens up a whole new vista of thought.
Black rubber valve stems on red rubber tubes. I have three
of them. They were on my 120 when I bought it, so it seems
likely they are original to the car, though it had Firestone
tires. I also found one of them had a different style of
Schrader plastic cap, pointy like a bullet.
I wonder how they made these tubes. Did they blow mold the
red tube first, and then stick the black stem on afterwards?Just for entertainment, I also have a box of metal Schrader
caps I got from my wife’s father, who was controller of
Sears Roebuck’s automotive department in the 1960’s.http://www.jag-lovers.org/snaps/snap_view.php3?id=1396061523
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
In reply to a message from Roger Payne sent Sat 29 Mar 2014:
If this is of any help…the UK made ones read ‘SCHRADER GtB’ the
US ones just ‘SCHRADER’…I have one that reads ‘SCHRADER CANADA’
Now…curiosity I have a few which are brass like the 880 slotted
design which have small rubber ‘caps’ that fit over the slotted end
as a cover…which have 'SCHRADER’in very small raised letters in
the rubber cap…vintage? pre war?–
godfrey
pender island bc, Canada
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
In reply to a message from godfrey sent Sat 29 Mar 2014:
Yes, Charles, my valve stems have paint on them; the wheels
had been painted 3 times with those tubes still in them,
white, red, and different red. I guess the DPOs had money
for paint but not for new tubes or masking tape.
No, Steve, they held air when they were 30 years old, but
not when they’re 62. They are cracked where they were folded
up stuck in a box, so I tore one open, literally with my
bare hands, just to see how the valve was done. It appears
the red rubber was blow molded first, then they cut a half
inch hole and vulcanized the black stem over it.
Roger, I don’t see the name Schrader on any of them, so
perhaps they didn’t do that for some reason with an industry
customer like Dunlop.
You are correct that August Schrader had a business in
Brooklyn, making diving helmets and air pumps. He and his
son George patented their tire valve in 1892. At first it
did not have the familiar closing spring, just worked by
back pressure.
Here are the original patents.
http://www.freepatentsonline.com/0484509.pdf
http://www.freepatentsonline.com/0473672.pdf
I did some surfing around the tire valve patent history
(there’s a lot) and found references that the Schraders
invented the valve cap in 1896. The metal valve cap with
removal tool appeared by 1920 and the straight removal tool
as in our tool kits by 1942. I still haven’t found a patent
for a plastic cap, which was my original quest.
Here is some more interesting history.
http://www.schraderinternational.com/Schrader-Past-To-Present/Schrader-History?sc_lang=en-US-NA
Be sure to read the advertising in the Schrader archives.–
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
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Some good stuff there Rob,
But a trap that we need to be constantly aware of when discussing XK
originality aspects is we need to focus on actual suppliers to Jaguar, so in
this case Schrader-GB via Dunlop-GB. I do have a number of Schrader-GB
adverts removed from 1950s MOTOR/ AUTOCAR and other British Magazines but
collating all these removed adverts is a huge task, and work-in-progress.
My comment about name Schrader being moulded onto Tyre-Valve Flange was
based on photo in 1952-GB catalogue so applied to what Schrader-GB was
offering to after-market/retail/repair industry, and as per Valve Caps maybe
not the same as offered in quantity/under contract to Dunlop-GB who then
supplied Jaguar.
But I am still guessing exactly what Schrader did supply Dunlop-GB?
Did they only supply the brass/threaded part of the Valve and then Dunlop
made there own black-rubber valve-outers/assemblies as part of their
tube-making process, or did they buy complete rubber/brass assemblies from
Schrader to then add to their own tubes.
Same doubt about the black-plastic valve caps - not being included in retail
catalogues doesn’t mean they didn’t have a direct supply arrangement.
Certainly you see retail metal caps and the small retail tin-boxes available
all the time, but I cant say I have seen the early black-plastic caps for
sale anywhere, albeit I have seen black-plastic caps from 1970s/80s period
with Schrader on them.
Roger Payne - XK140MC OTS; E-Type 4.2 S.1 OTS; DSV8.
Canberra.-----Original Message-----
From: owner-xk@jag-lovers.org [mailto:owner-xk@jag-lovers.org] On Behalf Of
Rob Reilly
Sent: Monday, 31 March 2014 8:45 AM
To: xk@jag-lovers.org
Subject: RE: [xk] Tyre Valve Stem Caps
In reply to a message from godfrey sent Sat 29 Mar 2014:
Yes, Charles, my valve stems have paint on them; the wheels
had been painted 3 times with those tubes still in them,
white, red, and different red. I guess the DPOs had money
for paint but not for new tubes or masking tape.
No, Steve, they held air when they were 30 years old, but
not when they’re 62. They are cracked where they were folded
up stuck in a box, so I tore one open, literally with my
bare hands, just to see how the valve was done. It appears
the red rubber was blow molded first, then they cut a half
inch hole and vulcanized the black stem over it.
Roger, I don’t see the name Schrader on any of them, so
perhaps they didn’t do that for some reason with an industry
customer like Dunlop.
You are correct that August Schrader had a business in
Brooklyn, making diving helmets and air pumps. He and his
son George patented their tire valve in 1892. At first it
did not have the familiar closing spring, just worked by
back pressure.
Here are the original patents.
http://www.freepatentsonline.com/0484509.pdf
http://www.freepatentsonline.com/0473672.pdf
I did some surfing around the tire valve patent history
(there’s a lot) and found references that the Schraders
invented the valve cap in 1896. The metal valve cap with
removal tool appeared by 1920 and the straight removal tool
as in our tool kits by 1942. I still haven’t found a patent
for a plastic cap, which was my original quest.
Here is some more interesting history.
http://www.schraderinternational.com/Schrader-Past-To-Present/Schrader-Histo
ry?sc_lang=en-US-NA
Be sure to read the advertising in the Schrader archives.
–
XK120 FHC, Mark V saloon, XJ12L Series II, S-Type 3.0
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –