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).
Battery ignition system design featuring scrubbing contacts, a flexible spring, and a damping mechanism.
| Identifier | ExFiles\Box 35\6\ scan 281 | |
| Date | 4th June 1927 | |
| Y8692 E1/M4.6.27. X V2854 4652 TO BY.{R.W. Bailey - Chief Engineer} FROM E.{Mr Elliott - Chief Engineer} C. to BJ. EFG. HS.{Lord Ernest Hives - Chair} BATTERY IGNITION. We send herewith drawing LeC. 2422. shewing the above arranged for scrubbing contacts and more flexible spring. A fixed contact is arranged in such a manner that the bedding of the contact surfaces is maintained as far as possible, even if the mounting flexes about as we expect it should. A damping device is provided for the flexible post in the form of a spring pulling the end of the post against a bakelite surface. The spring is made of such a form that it contributes to the damping, and should operate even if the post is not in contact with the bakelite friction surface. The mechanism should be tried with and without this damping device. The drawing has been made to suit the existing head casting, which is modified by having certain machining operations performed on it. It should therefore be a very easy matter to rig up the ignition head on these lines for test. In the event of this design proving successful certain modifications would be required of a permanent nature to the head casting. We should be glad to receive a blueprint of this drawing as soon as possible as further modifications will be sent shewing direct copper leads from the contact points to earth and condenser, cutting out as far as possible any self induction which may at present exist due to the steel spring etc. E.{Mr Elliott - Chief Engineer} | ||