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).
Technical note on the wiring scheme for the red lamp ignition warning light.
| Identifier | ExFiles\Box 61b\4\ scan0190 | |
| Date | 23th March 1932 | |
| X6114 BY.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Wst. c. BY/RD. c. E.{Mr Elliott - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Wst.8/MA.23. 3. 32. RED LAMP IGNITION WARNING LIGHT. We notice on the two schemes of R.R. dynamo voltage regulators the red lamp is arranged to be operated by separate contacts on the back of the cut-out armature. The usual scheme is to connect this lamp across the cut out points so that when the engine is rotating slowly or stationary the lamp light from the battery through the dynamo windings. The operation of the cut-out then simply short-circuits the lamp. Another pair of contacts on the cut-out regulator unit are thus avoided. Hs{Lord Ernest Hives - Chair}/Wst. | ||