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 function and benefits of Hartford Shock Absorbers for motor car suspension systems.
| Identifier | ExFiles\Box 51\4\ Scan032 | |
| Date | 10th February 1922 guessed | |
| 2. Now a light and more flexible spring which gives readily to the obstructions, reduces the shocks but does not prevent oscillation and bounding, which may cause great discomfort to the passengers and allows the chassis or frame to strike and bump on the axles, due to excessive deflection and is often the cause of spring breakage. By the application of a suitable governor or spring controller, it is possible to so alter the characteristics and natural defects of ordinary spring suspension systems as to approach the ideal and this is what Hartford Shock Absorbers do. They automatically reduce spring oscillation from comparatively high frequency and short period to a low frequency and long period of vibration. They absorb the excess energy stored in the spring when flexed, they prevent excessive spring deflection and force the wheels to follow the road surface instead of bouncing from one obstruction to another, they eliminate the faults of very flexible springs and give them the good characteristics of stiff springs without their disadvantages. It will be realised that in order to fulfil these conditions and to produce an ideal suspension, that the Shock Absorber must control the spring both on compression and expansion and that a Shock Absorber acting in one direction only cannot prevent excessive spring deflection, does not absorb the initial road shock or counteract the inertia of the unsprung weight of the axles, and have little effect on rolling, and do not protect the springs against the breakage. Hartfords neutralise spring oscillation in both directions, they absorb excessive shock and control the action of the spring under every condition of load and speed and road surface. Hartfords enable comparatively light flexible springs to be used with absolute safety and their introduction has marked a great step in the direction of producing the ideal suspension for Motor Cars. SOLE REPRESENTATIVES. T. B. ANDRE & Co., Ltd., 5, Dering Street, New Bond Street, LONDON, W.1. Phones: Mayfair 2542 and 2543. Telegrams: Ovantis, Wesdo, London. | ||