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).
Correspondence from Rolls Royce of America regarding the Mack Rubber Shock Absorber and rubber shackles.
| Identifier | ExFiles\Box 28\1\ Scan015 | |
| Date | 21th September 1922 | |
| Oy4-W-21922 September 21, 1922. Mr. Claude Johnson, Rolls-Royce, Limited, London, England. Copy for Mr. Royce, Hs.{Lord Ernest Hives - Chair}, E.{Mr Elliott - Chief Engineer} P. Re Mack Rubber Shock Absorber Dear Sir: [Red stamp over text: COPY] We enclose folders referring to the Mack rubber shackles. The makers are the biggest manufacturers of trucks, buses, and rail motor cars in the country, and the device therefore is of great interest. It is being very widely tried out, notably by the Fifth Avenue Coach Company of New York. It appears to be a logical method of eliminating shackle bolts. Yours truly, ROLLS ROYCE OF AMERICA, Inc. MO:W Engineer. | ||