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).
Test report from Joseph Lucas Research Laboratories on a foot-operated dipper or changeover switch.
| Identifier | ExFiles\Box 61b\3\ scan0273 | |
| Date | 8th July 1930 | |
| C.20.6 THE JOSEPH LUCAS RESEARCH LABORATORIES, BIRMINGHAM. ENGLAND. REF. NO. DATE 8.7.30. TO REPORT ON E.S. 18.DIPPER OR CHANGEOVER SWITCH, FOOT OPERATED, WITH 3 PIN PLUG AND SPLIT PINS ATTACHED. The switch was connected up on a 14 volt circuit breaking 12 amps. Before test the contacts were smeared with grease. It was then operated 10,000 times and again inspected. There was practically no sign of wear on any part and from its appearance and performance this switch is satisfactory. Volt drop after 10,000 operations - across one set of contacts 0.115 volts with 12 amps. " other " 0.095 " " ======================== | ||