Pre-1971 Corbin removable core

[YALE7750]

Hi everyone,

I have what is apparently Corbin's first attempt at a removable core, which according to the CorbinRusswin manual is referred to as "Round Removable Core" , dating from 1964 to 1971. When viewed from the front, it looks no different from any other Corbin/Russwin rim cylinder. It consists of a full size cylinder housed in a thin outer shell which carries the tailpiece and mounting points.

My question pertains to the control key--I can see from the diagram that the last pin is the only one which operates a control sleeve, but which way does it turn to remove? It looks like it should turn to the left, but most cores it should be to the right?

Thanks

[YALE7750]

I just discovered how to remove the core, the control sleeve must be turned left about 15 degrees to disengage a metal slide that locks over a pin in the housing. I've never seen anything like it, quite an interesting design.

Hi everyone,

I have what is apparently Corbin's first attempt at a removable core, which according to the CorbinRusswin manual is referred to as "Round Removable Core" , dating from 1964 to 1971. When viewed from the front, it looks no different from any other Corbin/Russwin rim cylinder. It consists of a full size cylinder housed in a thin outer shell which carries the tailpiece and mounting points.

My question pertains to the control key--I can see from the diagram that the last pin is the only one which operates a control sleeve, but which way does it turn to remove? It looks like it should turn to the left, but most cores it should be to the right?

Thanks

[MacGnG]

i have attached a page from the old manual. is this what you have?

i have been looking for one of these for years!!! please post pictures and let me know if you would be interested in a trade or anything!

[YALE7750]

That's the exact diagram I found, other than that I can find nothing else. In 35+years of collecting I've never seen one of these until now. I found it on eBay by accident; I wasn't even sure if it was the removable core version until I had it in my hands to examine. I can see why it had such a short production run--it really looks like they modified their existing adjustable cylinder to make it removable. On the other hand, when installed, it looks just like a standard cylinder. I actually recall seeing a very old Best removable core design in an old product catalog on eBay back in the 90's that was like this--the core face was round & full-size like any cylinder. I would imagine those are extremely rare today.

i have attached a page from the old manual. is this what you have?

i have been looking for one of these for years!!! please post pictures and let me know if you would be interested in a trade or anything!

[MacGnG]

how do you figure out the control key? been messing with this one i just got for a day or so.

[Pschiffe]

how do you figure out the control key? been messing with this one i just got for a day or so.

I believe that if you have an operating or master key, you could duplicate the first four cuts (5-pin ) or first five cuts (6-pin) on a new blank and then progress the tip cut one depth at a time until you find the control key bitting. If you want to take a shortcut, try the progression possibilities shown in the pdf. The control sleeve is operated by the tip cut on the key in the last pin chamber.

Pete