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).
Patent diagram illustrating a gear shift lock mechanism.
| Identifier | ExFiles\Box 136\4\ scan0145 | |
| Date | 14th February 1933 | |
| Feb. 14, 1933. A.{Mr Adams} E.{Mr Elliott - Chief Engineer} LEACH 1,897,851 GEAR SHIFT LOCK Filed May 12, 1932 4 Sheets-Sheet 4 Fig. 16 Fig. 17 Fig. 18 Fig. 19 Fig. 20 Inventor Albert E.{Mr Elliott - Chief Engineer} Leach Blackmore, Spencer & Flick Attorneys | ||