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).
General description of apparatus and modified instructions for the production testing of condensers or battery ignition.
Identifier | ExFiles\Box 34\1\ Scan179 | |
Date | 2nd March 1920 | |
X 2512 To Ry. from Ck.{Mr Clark} c. to Hy.{Tom Haldenby - Plant Engineer} c. to Mr. Brock. c. to Mr. Humpstone for U.S.A. Ck{Mr Clark}2/T2.3.20. X.1827 - APPARATUS & CONNECTIONS FOR PRODUCTION TESTING OF CONDENSERS OR BATTERY IGNITION. X.2512. We attach a general description of apparatus for use in the production testing of condensers, together with our suggested modified instructions for these tests. The feature of the test obtained by the use of such apparatus is that each condenser may be switched on at a comparatively low voltage which subsequently may be raised relatively gradually to its full value. Hence there will be much less possibility of spoiling a good condenser by just happening to switch it on at the wrong instant. This is brought about by the use of a lamp load across the high voltage terminals and a variable reactance in the primary circuit of the transformer. We have adapted for this purpose one of the magnets with its pair of coils, which was used for the propeller vibration tests which we did some time ago, and we have measured the voltages obtainable. You will notice that we are connecting up the supply for the transformer in a different way, namely, between the 220 and 400 volt tappings. This is necessary on account of the reactance exerted by the magnet with no keeper in place, resulting in terminal voltage of 180 in place of 210, when connected up in the manner shown (with the necessary lamps) to the tappings of the transformer labelled 220 and 400 volts. This | ||