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).
Test report on a battery ignition contact breaker to determine when sparking occurs.
| Identifier | ExFiles\Box 54\5\ Scan351 | |
| Date | 20th February 1931 | |
| WE.81. X6095. 20.2.31. X.6095/6. X.2918 X.6890 G119 X.7690. ECLIPSE TESTS OF BATTERY IGNITION CONTACT BREAKER. We have carried out tests on a standard contact breaker to ascertain whether sparking occurs at make as well as break using a disc provided with a small hole which could be set with the hole immediately over the points either at make or break. The disc was driven from the central spindle. With the contact breaker connected up to a standard ignition coil and the speed adjusted to 700 r.p.m. no sparking at all could be observed at the instand of make, all the sparking occurring at break. EFC/HEW. | ||