This was a design made by 3 brothers from the Old Kent Road area of London.
The Hellens brothers, Albert, Walter and Fred designed and raced bicycles in early 1900's. Even won medals from the St Johns cycling club.
The stay design was later patented by the younger brother Fred, after Albert died. This patent, legend says, was later bought by Raleigh. This caused a rift between Fred and Walter. There are newspaper articles of the time which show the Hellens family involvement in cycling.
I have some copies from these articles but the medals are with a family member.
Hope this helps