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).
Introducing an improved tyre pump connection called the Thumlock.
| Identifier | ExFiles\Box 149\5\ scan0039 | |
| Date | 10th November 1922 | |
| X493 Hs.{Lord Ernest Hives - Chair} TYRE PUMPS. I am sending you herewith an improved connection between the pump and the tyre, known as the Thumlock. The connection is simply pushed on to the valve and a small lever depressed by the thumb. This compresses a rubber tube and makes an air tight joint on the valve connection. You would probably like to try this out yourself as to whether you consider it is any value or not. By BY: RECEIVED NOV 10 1922 Hs{Lord Ernest Hives - Chair} | ||