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Conklin Crescent 2P BCHR w/Spring Clip

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#1 Stuart07

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Posted 28 December 2013 - 01:27 PM

Hello everyone,

 

Just received this on ebay. Vintage Conklin Crescent Filler 2P BCHR w/ Cap Clip.  Much better than online pix showed-almost no oxidation on cap & light oxidation on barrel.  Has Toledo #2 nib too. But lever locking ring seems frozen.  I cannot find any info online, including Binder, Da Book, Oldfield, showing lever mechanism inside barrel for this pen.  Pressure bar design or other relevant info necessary to service this pen intelligently.  Does section unscrew one way or the other, or is it a slip fit, etc...

 

Does anyone here have any information or experience with this one?  Any unique mechanism or "surprises" inside to watch out for?

 

Thank you all for any insights you may be able to give,

Stuart07



#2 Procyon

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Posted 28 December 2013 - 06:06 PM

All of the ones I recall had a slip fit section.  The pressure bar is about as simple as it could be.  The crescent is permanently attached to the pressure bar, and any spring-type resistance is provided by the rubber sac.  As I recall the pressure bar is quite thick and robust, so you don't have to be real delicate in cleaning out the old sac. 

 

I don't really understand how the lock ring can be "frozen".  Do you mean the crescent filler is frozen? That would just be because of a petrified sac. You won't find any drawings of a lever mechanism, because there is no lever in this pen.



Schrödinger's cat walks into a bar.  And doesn't.

 

 

Regards,
Allan


#3 ljwahl

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Posted 28 December 2013 - 07:17 PM

The pressure bar is just a flat bar, to which the Crescent is welded. The (three) Crescent fillers I've repaired have all been friction fit sections-- but as always it's an easy bet to hedge if you just work the section as if it's threaded when you go to open it up. The locking ring-- my guess is that there is dried ink which is causing the ring to stick to the barrel. I would work it gently every which way, dry, to see if I could loosen it.

#4 Stuart07

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Posted 28 December 2013 - 11:59 PM

Thanks to both of you for your kind help.

 

Allen, the crescent does not move at all.  It is frozen in place.  It could be a hard sac underneath, I realize that.  Ljwahl, you are probably right about dried ink causing the stuck ring problem.  I will try your suggestion first.

 

Stuart07



#5 Daniel A

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Posted 29 December 2013 - 08:49 PM

Stuart07, The section may be threaded, but most are not.  Those that are usually have an arrow on the section indicating the direction to turn (anti-clockwise, I believe). As for the lock ring and crescent bar, what the others have said is correct.  The ring is the only thing (apart from the sac) holding the crescent bar in place. It will fall down and slide out of the barrel if the ring is turned open and the sac is removed. There are no pins or levers or j-bars to contend with.  I have restored several hundred of these and the lock rings do get stuck occasionally.  Be very careful not to force it too much, as they are very brittle and break easily. A little heat and a little lubricant will most likely solve the problem. The sac is probably hardened and may be fused to the wall of the barrel and even onto the crescent bar. Use a sharp, narrow object to free and remove the sac once you get the ring to turn.

It is a wonderful filling system and you will love the way it functions when your work is done!

 

Regards,

Daniel



#6 Stuart07

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Posted 31 December 2013 - 10:18 PM

Daniel,

So many thanx to you for your suggestions.  I only just now saw it.  I did manage to get the section off- slip fit it was and you are right about the simplicity of the pen.  Very easy to service I.  One question about lubrication of the revolving ring.  What should I use to lube it with? 

Stuart07



#7 Procyon

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Posted 31 December 2013 - 10:56 PM

You didn't ask me, but I'll throw in my two cents anyway. I would say that normally lubrication isn't necessary, if everything has been cleaned.  However, if I did want to lube it, I would probably use silicone grease.  If you take the lock ring off to clean it, be sure and use heat - otherwise it may break.



Schrödinger's cat walks into a bar.  And doesn't.

 

 

Regards,
Allan


#8 Daniel A

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Posted 02 January 2014 - 08:23 PM

I concur with Procyon about the lube job.  I was unclear in my suggestion: I meant that you could use some lubricant--water or a solvent--to help loosen the ring as you tried to disassemble the pen.  You do not need to apply any now, as the ring should move freely and continue to do so.

 

Best,

Daniel



#9 Stuart07

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Posted 03 January 2014 - 02:14 AM

Sorry for the delay in reading.  Thanks to both of you for your help.  I figured the factory must have softened the ring to get it through in installing it then cooling it down to make it firm. I am surprised it could be so flexible though   quite amazing!  The ring does stick still and needs to be moved with gripper pad to get it going, then it moves just by my hand.  I can certainly try silicone grease...I do have some that came with my new TWSBI I bought last year.  The pen is a joy to use.  Although small (model #2P) it feels quite hefty in the hand while posted and writes just beautifully.

 

You guys are really great to take the time to be so helpful.  I am very grateful!

 

Stuart07






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