945 bicentric

[Pschiffe]

thank you,Pete
plugs are .507x1.513 includes cam lip

And the keyway(s)?

Pete

[nathanbonstein]

side marked lb on plug takes 998lb ,998gl that is all i have that fits on the case below plug is 2b2-94
side marked dd on plug took 998pl,998smk(would not fit-998s,yale s,sa,se,sf,n998sc) on case below plug is2c2-94
the yale pl might be a old safe key ?
thank you

[Pschiffe]

side marked lb on plug takes 998lb ,998gl that is all i have that fits on the case below plug is 2b2-94
side marked dd on plug took 998pl,998smk(would not fit-998s,yale s,sa,se,sf,n998sc) on case below plug is2c2-94
the yale pl might be a old safe key ?
thank you

I think PL is the multiplex master key to fit L and P families of keyways which were introduced in 1934. The GLP group was a family of 27 different single key sections, much like the present day GST group. It was later discovered that the way they were made was in error and that the S and T families introduced ca. 1899 could also interchange by key section.*

*adapted from Been There, Done That!, memoir of Billy B. Edwards, Jr. (BBE), (c) 2014

Pete

[Timothy]

Have some information on Bicentric padlock. Give some idea of what key to use. May be hard to read but i got it for while. Also little information on Bicentric Yale Mortise lock. Nice work and information of taken the lock apart...Tim....

[Timothy]

Don't know if the first one came out but try again..Tim...

[nathanbonstein]

thank you ,timothy and Pete, appreciated the help
it helped alot

[BBE]

I think PL is the multiplex master key to fit L and P families of keyways which were introduced in 1934. The GLP group was a family of 27 different single key sections, much like the present day GST group. It was later discovered that the way they were made was in error and that the S and T families introduced ca. 1899 could also interchange by key section.*

*adapted from Been There, Done That!, memoir of Billy B. Edwards, Jr. (BBE), (c) 2014

Pete

Hi Pete, just misinterpreted a little. Yale does have a L family of keyways and they are associated with the G and P families. There actually is a LP section that will operate all of the two families, but that key is never represented as PL. PL is a single keyway/section with a few specific use designations. The image is a picture of some documentation I have on it. Sorry for the poor quality, it was originally drawn on vellum in 1935. I don't know why it rotates when you click the thumbnail either.
BBE.

[Pschiffe]

Hi Pete, just misinterpreted a little. Yale does have a L family of keyways and they are associated with the G and P families. There actually is a LP section that will operate all of the two families, but that key is never represented as PL. PL is a single keyway/section with a few specific use designations. The image is a picture of some documentation I have on it. Sorry for the poor quality, it was originally drawn on vellum in 1935. I don't know why it rotates when you click the thumbnail either.
BBE.

Thanks for the clarification Billy, I rotated your thumbnail:

Pete

[Pschiffe]

Thanks for the clarification Billy, I rotated your thumbnail:

Pete

Billy, here's an image of a seemingly different Yale PL blank from my collection, see thumbnail attached. Definitely appears to be a "double milled" multiplex master same as shown in Nathan's earlier image! I likely got my two samples from a colleague on ClearStar Security Network?

Pete Schifferli

[BBE]

Billy, here's an image of a seemingly different Yale PL blank from my collection, see thumbnail attached. Definitely appears to be a "double milled" multiplex master same as shown in Nathan's earlier image! I likely got my two samples from a colleague on ClearStar Security Network?

Pete Schifferli

Obviously a mismarked key. Note the stamping is misaligned and probably just mismarked after the second milling. I was in charge of the key milling department, key bitting and cylinder assembly and that just isn't done. A customer reading that marking would get the wrong key or the whole thing would be rejected, someone got lazy.
BBE.