There are pivots and then there are pivots. This blank pivot is from a size E, Monarch floor spring, I hope to be able to discuss it and other features of this floor spring as time goes on.
I was contacted by Unicorn Restorations to repair a door closer that was found in the header section of a very rare K2 phone box, there were only ever 1500 manufactured compared with the more well known K6 phone box of which 136,000 were manufactured. The K2 phone box was only ever distributed in and around London, compared with the K6 that was distributed nation wide.
The arm to this door spring was bent in a number of places and twisted, the spring itself was broken, the fixing flange had a corner broken off and all the hinge points were loose and tired.
I was surprised at how small the closer was, especially as I recall the doors to the old phone boxes were heavy cast iron affairs. I took the shot of a Briton A so you can get a comparative understanding of its size. While talking to the owner (Tony) of Unicorn Restorations I mentioned my surprise at how small the door spring was only to be informed that the doors to the old phone were wood, not cast iron and were therefore much lighter than I imagined and as it turns out wrongly recalled.
Here are some links to the history of this most British of icons and Unicorn Restorations for those wanting more information.
As always feel free to leave positive comment.
In this blog entry I would like to share some videos and link to a linkedin post of a video I made showing how I disabled a Dorma 75 v and Dorma BTS 80's. As can be seen in the video I show a Dorma 75 v with a Briton pin and strap freely spinning after I uncoupled it from the floor springs mechanism plus BTS 80's doing the same.
The calculation data for this conversion is as follows:
Basic dynamic load rating C 8.5 kN
Basic static load rating C0 26 kN
Fatigue load limit Pᵤ 3 kN
MFS has found by far our tried and tested service/solution (5 years with no problem) to be the best way of dealing with the associated problems surrounding an existing installation prior to the fitting of any over-head disabled door opener all things considered (including cost, durability, ease, down-time, is environmentally friendly and is reversible. Inquiries are most welcome through our contact page. Training and possible franchising may be available.
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.