Body shape may favor the Corbin/russwin, this appears to be a Dorma 7800 series as indicated by the snap-fitted elbow joint, Corbin/Russwin in 80’s and 90’s used a ball and socket type joint similar to a potbelly but as a riveted arm, nowadays C/R uses the same arm Norton/Yale uses
Loved watching you demonstrate your Corbin!! Its yes because of how the insides work why it it jerky until a certain point in closing cycle, thanks for shoutout. That is correct about what valve does what as well, your learning. I am glad to be helpful and teach you on these old beauties! -Jess the Door Closer Doctor
Thanks for the shoutout!! It appears its more of a door issue why this closer is not latching properly, it being 100 years it will have some problems here and there. This door looks familiar, did you have one of your smaller closers on pull side of this door last year?? I think it was the Universal hardware or the Ryobi as I remember being on video chat with you during the install
It’s the door close the guy from that group on Discord that you spoke to a couple days ago. I would love one of them. I’ve always wanted a potbelly. It’s not my dream clothes but it’s one of really wanted for ages.
@@Busterboo13yes the arm is upside down on the russwin, I helped him get the arm off while on video chat, the closer did put up a fight but it eventually came off.
The first 2 closers are the LCN 4110/4113, 4040’s use a different bolt hole pattern. The twins “UL fire door” door closers with the small arm is Rixson Smoke chek, Universal hardware and Ryobi use a similar body but UH I believe is from China and Ryobi is from Japan, the brands are independent of eachother. Love seeing your collection!! -Jess the Door Closers Doctor
The electronic hold open device, it was installed paralell or regular arm, it used the closer’s arm and looked like 2 closers sharing same arm, the device is no longer used /obsolete by today’s standards, The device was known as the Rixson “Smok-Check” Nice find!!
The first one that you mentioned is not doing it’s hold open, although many of the Uni-trol arms look similar, the arm it has now appears it only limits how far the door can be opened.