The Brecknell, Willis Highreach pantograph
|In 1973 the small West Country firm of
Brecknell, Willis & Co. patented a very compact and ingenious design of
single arm pantograph. This was a development of an idea from Doug Dixon, a consultant
designer to BW & Co.
The pantograph was primarily designed as a lightweight rapid transit pantograph where its compact size when folded, combined with its ability to reach up to high wire height, resulted in it being christened the 'Highreach pantograph'.
The pantograph was, in keeping with most pantographs
at the time, spring operated with an elementary head suspension. It featured
needle roller bearings at the base as well as cams and chains at the
elbow. The operating rods were cleverly hidden inside the hollow arms making
an excellent aesthetically pleasing design.
Click on the picture for a bigger image
After a few years the depot manager moved on and maintenance of the pans
deteriorated finally resulting in them being removed around 1980.
The Highreach pantograph has in itself been a very successful pantograph and formed the basis of the BR/BW Highspeed pantograph.
Click on the picture for a bigger image - photos are the author's