From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The operation and adjustment of a servo-assisted braking system with equalisers.
| Identifier | ExFiles\Box 178\1\ img081 | |
| Date | 9th July 1924 | |
| - 3 - the end of the equaliser lever D.{John DeLooze - Company Secretary} and exert a pull in the brake ropes. The two levers A.{Mr Adams} and B. are inserted between the rod from the pedal to the rear equaliser. This is the direct pull to the rear brakes and also serves to operate the servo. Both the servo pull and the direct pull from pedal are operating simultaneously therefore the pull operating the rear is made up of the direct pull, and pull from the servo while the front brakes are operated entirely by the servo D.{John DeLooze - Company Secretary} The pressure applied to the servo plates is proportional to the direct pressure to the brakes consequently the pull exerted by the servo will bear a fixed ratio to the direct pull. The braking is made independently of the direction of rotation of the servo by means of the two levers E.{Mr Elliott - Chief Engineer} so whichever way the servo plates tend to turn there will be an upward pull at the end of the equaliser lever. A means is provided for adjusting the clearance of the servo plates. It consists of a nut at the end of the servo shaft fitted with automatic locking device. In this system the pull operating the brakes is equalised by means of three equalisers - one between the two front brakes - one between the two rear brakes, and another between the front and rear systems. Adjustment for the brakes is provided on each of the brake cam operating levers. This adjustment rotates the brake cam in relation to its operating lever and by this method does not alter the angular positions of the various levers. Hs.{Lord Ernest Hives - Chair} | ||