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Misc: Everything Else Jaeger Clock Mount for Comet C


Steve Morris

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VOC Member
Hi all,

I have recently acquired a JAEGER 8 day 31/2" clock, which i want to mount on my series C Comet. Mounting point will be opposite the 31/2" speedo of course. The only issue i have is the clock i have is clearly a car clock and not a motorcycle one. Now i have no issues fitting this, as i can mask up the light apertures (see pictures) and fashion a bracket to mount it. Reason i am posting this is i have looked as far as i can (i think) on the web, for a 'casing' for this clock, thereby covering up said gaps, and turning it into a bike one.

Does anyone know where i may be able to get one (and bracket) or indeed does anyone have one hanging in their shed they want to re-home?

Thanks in advance.

Steve.IMG_1924.jpgIMG_1925.jpgIMG_1923.jpg
 

vin998

Well Known and Active Website User
VOC Member
VOC Forum Moderator
Steve
I looked at this years ago with a view to fitting an 8 day clock on my series A Comet and the conclusion I came to is the car mechanism will not fit inside a motorcycle speedo body which is smaller at 80mm (approx 3") in diameter. Also I have since been told by somebody who restores chronometric speedos and the sometimes 8 day clocks that the motorcycle mechanism is different to a car mechanism as in the bike one is built to a more rugged design to withstand shock and vibration from being mounted on the top of the forks.

Simon
 

Steve Morris

Well Known and Active Website User
VOC Member
Hi Simon,

I did wonder about the vibration, I was wondering if i am making my own bracket i could rubber mount it?

Steve.
 

vibrac

Well Known and Active Website User
VOC Member
1573475370862.png
suspended on a large o ring or rubber band is how the racing revcounters did it
 
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erik

Well Known and Active Website User
VOC Member
This is not such a Thing like a Jaeger Instrument,but it is very cheap and you can do races against the time.Regards Erik
 

genedn

Well Known and Active Website User
VOC Member
Hi Simon,

I did wonder about the vibration, I was wondering if i am making my own bracket i could rubber mount it?

Steve.
Steve,

The correct bike clocks are a small movement with long posts that are sprung internally to dampen vibrations.
I believe the Velobanjo gent blog covers this in great detail. I found allot of information online when I made mine.

Best,

Eugene.
 

peter holmes

Well Known and Active Website User
VOC Member
Steve, those car clocks look a bit heavy on a bike, and when the genuine article crops up from time to time, (no pun intended) they push up near to £1k, utter madness in my opinion, if you just want to tell the time when you are in the saddle, but you want it to look right you could do a lot worse than buy a battery operated replica, exact correct size, even comes with a replica winder knob (not functional) keeps perfect time, doesn't matter if it shakes itself to bits as it doesn't cost too much in the first place, when it stops working, change the battery, what is there not to like. Oh forgot to say, don't enter the bike into any concours competitions, they might just spot that it is a fake and you will not win a plastic trophy, ironic isn't it.
 

vin998

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VOC Member
VOC Forum Moderator
Eugene is correct. For the original motorcycle 8 day clock the anti vibration mounting is not a part of the external mounting bracket, but is built into the inside mechanism of the clock itself.

The first photo is of a replica I made with an old 3" speedo body and modern quartz internals running off an AA battery which I placed inside the headlight shell and currently fitted to my bike.

The other 3 photos are of an original pre war motorcycle 8 day clock.
 

Attachments

vin998

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VOC Member
VOC Forum Moderator
What does the back of your original clock look like?
The photo of the clock back in my post #10 above is of the original Smiths 8 day clock.
IMG_2742.JPG
 
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vin998

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VOC Member
VOC Forum Moderator
It does not look like the ones I have. What is inside the case?
I don't have any photos of the inside but when Russell Smalley was restoring it I saw the inside and the clock mechanism is a bit bigger diameter than yours with approx 3/16" clearance all round to the internal diameter of the 3" case where as your mechanism is a lot smaller than a 3" case. The mechanism mounts via 3 short columns (on a larger PDF than your mounting columns) and these columns connect to a large diameter wavey shaped thin plate which is just a bit smaller than the inside diameter of the case and which is pressed / shapped to absorb shocks and that plate centrally mounts to the case and so the mechanism doesn't connect direct to the case. There are no rubber mountings.

Russell had 3 in at the same time and one was off his own Rudge and the third was off a series A Rapide so these appear to be a pre war type so that may be why they are different.

I suspect your clock is a post war type. What type of Smiths logo is on the face?
 

Steve Morris

Well Known and Active Website User
VOC Member
Great look, exactly what i am looking for. Is this a genuine clock though? I would have no issues fitting a replica clock to my bike, i honestly wouldn't mind for me it has to be functional first, and look fairly good.

Simon, yours is a replica? Where did you buy it from?

Thanks for all the replies,

Steve.
 

vin998

Well Known and Active Website User
VOC Member
VOC Forum Moderator
Great look, exactly what i am looking for. Is this a genuine clock though? I would have no issues fitting a replica clock to my bike, i honestly wouldn't mind for me it has to be functional first, and look fairly good.

Simon, yours is a replica? Where did you buy it from?

Thanks for all the replies,

Steve.
Steve
With regard to the 4 photos in post #10 above, the first photo of a clock mounted to my series A is the replica I made myself nearly 10 years ago with modern battery powered quartz movement inside. The next 3 photos in the same post is of a clock on its own and not mounted to the bike is a pre war mechanical Smiths 8 day clock. I know the guy I got it off who restored it doesn't have any more for sale.

Simon
 

Robert Watson

Well Known and Active Website User
VOC Member
My A twin has an original - but not from a Vincent. When the previous owner bought it (in the late 50's - early 60's) the clock was long gone, but he knew where there were a pair of Rudges, one of which had its original clock. He bought the Rudges, removed the clock and then sold the Rudges on. So there are two funny bits to this, The guy who ended up with the Rudges who I got to know years after this, remembers buying them and questioning where the clock was, as he had seen them with the original owner and remembered the clock. Dial up some 50 or 60 years later and I purchase a Rudge Uster, which came from the same area of the country, but no idea if it was That Rudge, but it has no clock, so not wanting to pay over the moon for a real one and too much on my plate to go about reconstructing one, I just got a replica one from David Woods. All modern inside and looks the part!.
 

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