All those patent dates

[Jack Cronkhite]

Have you ever wondered about the patent dates so permanently stamped into a variety of parts on your Parker? I didn't give them much heed but then I ran into a problem with a GHE. One ejector refuses to re-cock. I can push it into place but it refuses to hold. I'm an inveterate tinkerer, so thought I should be able to deal with this. Now I know the system is considered complicated and not probably the best idea to tackle it but then I figure it can be, if nothing else, a learning experience with the out that there are master gunsmiths who can take over where I give up, if I do.

Try finding a schematic or any kind of instructions on-line for century plus firearms and you soon become disillusioned. Turned next to TPS and on page 128, there is a rather murky diagram of the ejector system. Not much help there. Turn in desperation to the "index" and you will find a reference to patents. Check that and you find "every" patent number ever issued to our favorite Meriden company.

Now on the ejectors in question, the patent date May 7, 1901 is stamped in the fore end iron. Check TPS and find the patent number for that date is 673641. Well, not a lot of help there until you check our great friend Google and instantly you can pull up the patent issued. Several detailed pages describing the system and the three original diagrams submitted with the application. Now those are helpful in this tinkerer's quest. For your enjoyment, here are those diagrams, complete with signatures of some of the names we know. All those lines with reference numbers could have used a table but they are all found in the extensive write-up. It is a brave new world for old stuff. Cheers, Jack

http://parkerguns.org/forums/picture.php?albumid=664&pictureid=7805

http://parkerguns.org/forums/picture.php?albumid=664&pictureid=7806

http://parkerguns.org/forums/picture.php?albumid=664&pictureid=7807

[Robin Lewis]

Jack,

If you are interested in the text of the patent you can read it all at http://pdfpiw.uspto.gov/.piw?PageNum=0&docid=00673641&IDKey=A664EE2E831E&HomeUrl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fn ph-Parser%3FSect1%3DPTO1%2526Sect2%3DHITOFF%2526d%3DP ALL%2526p%3D1%2526u%3D%25252Fnetahtml%25252FPTO%25 252Fsrchnum.htm%2526r%3D1%2526f%3DG%2526l%3D50%252 6s1%3D0673641.PN.%2526OS%3DPN%2F0673641%2526RS%3DP N%2F0673641

If you want to read others, you can try this page to find them: http://patft.uspto.gov/netahtml/PTO/srchnum.htm

These are pages at the government's patent office (the second is a simple search form page), not google or worse,
some other place that might try to extract monies to get information that is free for the taking.

Just thought you might like to know about the uspto government site. I've used it and find that it sucks you in reading one then another, and another...., reading about some interesting ideas that may or may not have seen the light of day.

Robin

[Paul Ehlers]

Jack,

Not seeing your gun. My bet will be a problem with item #27 in figure 8 page 3

I've had this little tang shear off on one Parker and that ejector would not stayed cocked as you describe.

Let us know what you find out !

[Gary Laudermilch]

That is precisely the piece that has broken on two of my repro's. I thought somebody said somewhere that there is supposed to be a radius on that inside corner. That does not appear to be the case in the drawing.

[Dean Romig]

That is precisely the piece that has broken on two of my repro's. I thought somebody said somewhere that there is supposed to be a radius on that inside corner. That does not appear to be the case in the drawing.


Yes, same on two of my Repros. There is no radius of the Repro ejector hammer cocking tab as there is on the original Parkers. Parker Bros. learned the importance of such a radius on the lifters which had a perfect 90 degree from the water table to the standing breech. Some of those cracked under the stress of concussion and that led to the easy remedy of cutting that angle with a small radius.


From the Parker Marketplace in the last issue of Parker Pages
and from an earlier forum topic -

http://parkerguns.org/forums/showthread.php?t=16117&highlight=reverse+engineering

I bought one of these and the precision is incredible!...






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[Jack Cronkhite]

Has anybody here serviced the ejectors themselves? I would like to hear from you.

[Dean Romig]

Jack, I wouldn't recommend it to anyone else but you. I'm pretty impressed by the pains you took to methodically and carefully disassembled that rusted up project Parker and detailed the process with pictures and descriptions for all of us to learn from.

I've heard it is pretty tricky and getting them timed properly will tax your patience and skills.





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[Mike Franzen]

Those patent drawings would look nice printed out and framed for hanging in the gun cave. Jack I like your fallback position of sending the parts to the Master Gunsmith if you can't figure it out. This will be a good thread to follow.

[Jack Cronkhite]

I won't be jumping into disassembly until I have some information on correct disassembly. Biggest concern to me is springs, especially fairly heavy duty ones. I wear eye protection to mitigate risk but proper sequence is very important. I do have a call in to a master to lend a guiding hand across cyber-space.

Robin and Dean: I'm wondering if we might enhance our site by adding a tab on the home page for Parker Patents with external links to each Parker gun related patent held at the US Patent and Trademark Office. I did try to navigate that site and found I had a heck of time to find anything. Having the actual patent number from TPS works fine but a blind search for ejector systems got me nowhere. Didn't know enough about their terminology I think. It would be a bit of a project but I think it would be a great enhancement to our site. The diagrams are most useful and the suggestion for print/frame/hang in the man cave seems a good use too.

Cheers, Jack

[Dean Romig]

Jack - that's not my bailiwick but it certainly would be a nice resource.
Learning all you can about the ejector system before you delve into it is true to your MO...
I knew you'd take that route.






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[Brian Dudley]

An ejector hammer not cocking can also be a result of damage or wear to the cocking toggle. Figure 10 in the patent drawings.

[Robin Lewis]

Robin and Dean: I'm wondering if we might enhance our site by adding a tab on the home page for Parker Patents with external links to each Parker gun related patent held at the US Patent and Trademark Office. I did try to navigate that site and found I had a heck of time to find anything. Having the actual patent number from TPS works fine but a blind search for ejector systems got me nowhere. Didn't know enough about their terminology I think. It would be a bit of a project but I think it would be a great enhancement to our site. The diagrams are most useful and the suggestion for print/frame/hang in the man cave seems a good use too.

Cheers, Jack

There is a link in the Technical Information page for all the Parker gun related patents I could find.

[Dean Romig]

Why can't I click the 'thumbs up' icon multiple times?!?!






.

[Jack Cronkhite]

Robin, that is great. No sooner mentioned than done. Fabulous resource at our finger tips now. A great enhancement to our site. Thanks, Jack

[Jack Cronkhite]

All that has happened so far is to give the mechanism an ultrasonic cleaning, just in case it was a matter of a century of grunge inside. Well, that isn't the case. It certainly cleaned up nicely but the problem is not rectified. Still waiting for more info. Cheers, Jack