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).
Page 3 of a patent application detailing eight claims for an improved leaf spring design for vehicles.
| Identifier | ExFiles\Box 154\1\ scan0030 | |
| Date | 1st November 1929 guessed | |
| 1,380,523 3 improvements. It will be obvious also that the end thrust or shock on the spring, instead of being carried by a single leaf, is distributed between all the leaves. More-over, in assembling the spring, it is not necessary that special provision be made for giving “bearing” of one leaf on another, since all the plates are the same, and are subject to the same reaction under load. In manufacturing, each plate can be tested by itself and, in assembling, no peening, ham-mering or other fitting is necessary after heat treatment, such peening as is required by ordinary leaf springs being detrimental to the fatigue-resistance of the spring. As shown in Fig. 6, a spring constituted by leaves of the conformation and arrange-ment hereinbefore described, lends itself readily to adaptation as a cantaliver spring, capable not only of supporting the body of the vehicle above the axle, but also of transmitting the impelling force of said axle to said body. Such a spring may be conveniently split or divided into two parts 13 and 14, having a common point of at-tachment to the frame of the vehicle at the shackle 15, the leaves being held in said shackle in any suitable manner. The part 13 may be shackled or otherwise attached above the axle 16 to any member rigid therewith, such as the drum 17 used in connection with the brakes of the motor vehicle, while the part 14 may be similarly attached below the axle 16. I claim. 1. A spring consisting of a series of super-imposed leaves of equal length, with each leaf reduced in width from the center to-ward each end, with the ends of the leaves in different vertical planes, and a shackle uniting the ends of the leaves and permitting a rocking movement of the end of each leaf in said shackle. 2. A spring comprising a series of super-imposed leaves of equal length, with each leaf reduced in width from the center to-ward each end, with the ends of the leaves in different vertical planes, a shackle to which the corresponding ends of all of said leaves are pivotally attached in staggered arrangement to bring the ends of alternate leaves in the same row, and with the longi-tudinal axes of all the leaves in the same vertical plane at the center of the spring. 3. A spring comprising a plurality of superposed leaves of equal lengths, and a shackle to which the corresponding ends of all of said leaves are pivotally attached, the points of attachment of the leaves being staggered in arrangement to bring the ends of alternate leaves in the same row. 4. A spring comprising a plurality of leaves of equal lengths, and means for shackling the corresponding ends of said leaves, comprising bearing lugs on the ends of said leaves, and a shackle providing staggered recesses for the reception of said bearing lugs. 5. A spring comprising a series of leaves of equal length provided at their ends with spherical lugs, a shackle uniting the ends of said leaves composed of plates placed side by side and having recesses embracing said lugs. 6. A spring comprising a series of leaves of equal length provided at their ends with spherical lugs, shackles uniting the ends of said springs composed of plates placed side by side, with their contacting sides provided with recesses embracing said lugs, and a single lubricating channel communicating with each of said recesses. 7. A spring comprising a series of leaves of equal length having enlarged lugs at their ends, a shackle uniting the ends of said leaves consisting of a horizontal central plate and two outer plates united at their ends, recesses in the opposing surfaces of said plates to receive said enlarged lugs, with the recesses above said central plate in staggered relation to the recesses below said central plate. 8. A spring comprising a series of leaves of equal length placed one above the other, with the longitudinal axes of alternate leaves placed at an angle to the longitudinal axes of the remaining leaves, and with the axes of all the leaves intersecting at the center of the spring. CLARENCE A.{Mr Adams} BROCK. Witnesses: ENOCH SMITH, E.{Mr Elliott - Chief Engineer} J.{Mr Johnson W.M.} FEFAREK. | ||