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).
The testing of inspection lamp bulbs and a suggestion for a suitable replacement.
| Identifier | ExFiles\Box 166\4\ img090 | |
| Date | 17th January 1941 | |
| C.F.B. JD{J. Draper - Frames}110. X.6089 17-1-41 X.6089 Inspection Lamp Bulbs. The type of above bulb submitted to us by G.E.C. Co having a 14 volt rating cat no S7214 has now been tried by our garage testers & they report these bulbs are not sufficiently bright to work with. It appears what they require is a bulb of the same brilliancy as the original cat no S7168 but to be more durable. The only alternative I can see is using a 14 volt bulb as now but of a larger watt capacity say 8 or 9. I suggest we ask the G.E.C. Co. to submit us a bulb for test that may be suitable for this purpose. EF | ||