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 specifications for a switch, detailing current limits and voltage breakdown tests.
| Identifier | ExFiles\Box 60\2\ Scan056 | |
| Date | 25th February 1932 guessed | |
| -5- contd. at least sufficient to pull the switch lever right down to the armature stop. If the current falls outside either of these limits the main spring and the lower hold on contact spring shall be suitably re-adjusted. (4) It shall further be verified that when this current is gradually reduced the minimum current which will prevent the switch dropping back to its off position shall not exceed 1.0 ampere. (5) Whilst still warm from test (5), an alternating voltage of 200 shall be applied, through a lamp, between the winding and the switch arm for one minute without breakdown. HS {Lord Ernest Hives - Chair} /Wst. | ||