Heres an unusual floor spring I worked on a few weeks ago at Nottingham University. It was supplied by Charles Smith & Co Limited, Deritend Bridge Works, Birmingham as can be seen on the brass cover plate.
It was unusual because although only having a single access hole like the 600's I have previously shown you it had a square pin like the Singlo. It was completely worn out and in this instance I changed not only the floor spring but the shoe also. The Newman 600 I replaced it with has an oblong pin and therefore it would not mate up to the original shoe.
In the shot above you maybe able to see that the pin is slightly off square, meaning the door was not closing against the jamb, leaving it slightly ajar.
Above is the fully refurbished 600 I replaced it with. Can you see how the pin sits, making the door sit snuggly against the frame?
As there is so little information out there with regard to door closers, especially vintage and antique model floor springs, I thought I would start this blog.