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).
Recommended and tested spring loads for a contact breaker.
| Identifier | ExFiles\Box 35\6\ scan 399 | |
| Date | 5th March 1928 | |
| To BY/RD. from EFC. X8692 EFC2/T5.3.28. SCRUBBING ACTION OF CONTACT BREAKER TO LEC.2460. Will you kindly note that our recommended loads in connection with this spring are as follows :- Load on contact points - 12 ozs. Force on pivot - 14 ozs. We had some springs which were as weak as :- Load on points 6 ozs. Force on livot 8 ozs. We understand you are taking up with the makers the matter of obtaining suitable springs for this scrubbing action contact breaker. For our 10,000 mile test of these, we have selected from those already delivered those springs giving the larger forces. EFC. | ||