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).
Diagram illustrating the arrangement of a servo device and compensation mechanism for brakes.
| Identifier | Morton\M1.A\ img012 | |
| Date | 24th November 1921 | |
| Lec. 1495. FROM PEDAL WHETHER CAR IS GOING FORWARDS OR BACKWARDS SERVO DRUM ROTATES THE SAME WAY INTERNAL AND EXTERNAL GEARS ROTATE IN OPPOSITE DIRECTIONS FROM PEDAL CLUTCH DISENGAGES RATCHETS ETC WHEN BRAKE OFF THREE DIFFERENTIALS COMPENSATE FOR ALL BRAKES TO FRONT BRAKES TO REAR BRAKES WHEN CAR MOVING FORWARDS THIS RATCHET IS DRIVING WHEN CAR MOVING BACKWARDS THIS RATCHET IS DRIVING ARRANGEMENT OF SERVO DEVICE AND COMPENSATION FOR BRAKES 40/50HP. IND. 24/11/21 | ||