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).
Promotional leaflet for Houdaille Hydraulic Shock Absorbers for commercial vehicles, detailing their function and application.
| Identifier | ExFiles\Box 25\2\ Scan124 | |
| Date | 13th October 1926 guessed | |
| Panel 1: Houdaille (SAY "HOO-DYE") Hydraulic Shock Absorbers [Sectional drawing of the shock absorber mechanism] IMPELLOR REGULATING ROD Sectional Drawing showing their Action and how they perform their duties. THEIR ACTION. WHEN THE CAR SPRINGS ARE COMPRESSED, The Impellor—which is an integral part of the shaft and is coupled to the lever arm—moves in, say, the direction of arrow "A"; the valves "V" in the fixed member open or lift from their seats, allowing the oil to pass freely from one section of the working chamber to the other, in a clockwise direction, offering no check to the movement of the Impellor blade, and consequently no retarding action of the spring—(on opposite side of a pair this action is reversed). WHEN THE CAR SPRINGS RECOIL, The Impellor reverses its direction of movement, the valves "V" close, and the oil in chambers "X" and "Y" check and control any further movement, the amount of which is governed by the position of the Regulating Rod, which, according to setting, allows a definite flow of oil from the compression chambers to the "free" chambers through Regulating Apertures (2), the energy of recoil being thus gradually brought to rest by this action, which is, as one can see, progressive in relation to the force of the spring recoil. Panel 2: THEIR DUTY. Houdailles do not in any way check the car springs on their compression—viz., the movement given when a road wheel hits a bump—consequently the more supple and easier the car springs, the smoother the car rides over the rough surface, but they completely control the force of the recoil of the springs and thus prevent side sway and road shocks. The following are a few of the important firms who are already equipping their fleets of Lorries with the Houdaille Commercial Type of Hydraulic Shock Absorbers :— Messrs. Felix Potin . . 50 Lorries. (Wholesale Grocers). Messrs. "Olida" . . 40 " (Wholesale Grocers). Messrs. Galéries Lafayette . . 50 " (Drapers and Furnishers). Messrs. Lambert Bros. . . 80 " (Building Materials). French Army Engineering Corps—Fitting several Lorries weekly. Messrs. Saurer, the most important manufacturers of Lorries in France, after conclusive tests, now recommend their employment on all Lorries of their manufacture. HOUDAILLE HYDRAULIC SUSPENSIONS are Standard fitting on :— ALBA G.{Mr Griffiths - Chief Accountant / Mr Gnapp} IRAT ALDA LINCOLN ARIES LAGONDA BENZ MERCER CHENARD-WALCKER McFARLAN CHRYSLER (French Agency) MINERVA CUNNINGHAM MIESSE DELAUNAY-BELLEVILLE MORANE-SAULNIER DELAHAYE PIERCE ARROW FARMAN ROCHET SCHNEIDER STEARNS KNIGHT UNIC PANHARD (English Agency) Panel 3: RIDE ON OIL AND SAVE RUNNING EXPENSES NEW MODEL Houdaille (SAY "HOO-DYE") Hydraulic Shock Absorbers for Commercial Vehicles. What they do and How they do it [Drawing of the shock absorber fitted to a front axle] TYPICAL FRONT AXLE FITTING Sole Distributors for the British Empire : The Houdaille Hydraulic Suspension Co. Ltd. 41 New Bond Street, London, W.1 Telephone: Mayfair 6266 (2 lines). Telegrams: "Houdaille, Phone, London." 10000/10/26 | ||