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).
Drawings for improved battery ignition components, including scrubbing contacts and a contact arm spring.
| Identifier | WestWitteringFiles\Q\July1927-September1927\ Scan139 | |
| Date | 17th September 1927 | |
| FROM E.{Mr Elliott - Chief Engineer} C. to EFC. ORIGINAL BATTERY IGNITION. We send herewith drawings LeCs. 2460/1. shewing the above arranged with two further types of scrubbing contacts, and also with an improved type of contact arm spring. LeC. 2460. shews the scrubbing contact arranged in the most easily adapted form for the present parts. This (Handwritten: 27c) should be tested out as early as possible, as, if it should prove successful we should prefer to adopt this rather than move the L.T. terminal. [Handwritten note: Inst'd 8-10-27] LeC. 2461. shews the original type of scrubbing contact with a long mounting, but made in 14 gauge steel (Handwritten: 27d) instead of the previous shaped mounting. This is to render this design more practical and easily produced. [Handwritten note: Inst'd 10-10-27] The free ended spring has been drawn with the object of overcoming spring breakage, as there is no sudden stress (Handwritten: 33) change in it. It is anchored by means of a stirrup, which is a great convenience in detaching the rocker. [Handwritten note: Included in both Re above] The flexible is shewn on the drawing in both instances for carrying the current from the contact arm to earth, but this should only be used if the spring is found unsatisfactory as regards making contact. E.{Mr Elliott - Chief Engineer} | ||