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).
Production test procedure for a paper dielectric condenser for battery ignition.
| Identifier | ExFiles\Box 168a\5\ img018 | |
| Date | 15th October 1926 | |
| X6145 15.10.26. V8720 X7720 Y5720 PRODUCTION TEST OF PAPER DIELECTRIC CONDENSER FOR BATTERY IGNITION (1) It is assumed that each condenser, after production and before encasing, will be stored for a day or two previous to test under conditions which will enable it reasonably to settle down in capacity. (2) The condenser, still out of its case, shall be tested by applying to its terminals an alternating voltage of 400 (R.M.S.) for a period of one minute, through a light fuse, without breakdown. (3) Now verify that the condenser is capable of holding a static charge. If this is the case, the condenser, after being disconnected from the 400 volt supply, should be capable of producing a spark, when one end of a wire, the other end of which is connected to one condenser terminal, be brought in contact with the other terminal. (4) The condenser shall now undergo a preliminary test for capacity, being placed in series with an A.C. milliammeter reading up to 30 milliamperes, across an alternating voltage round about 200, at a frequency of 50.7 ~. (5) If satisfactory as regards (2), (3) and (4), the condenser shall now be fitted up in its case. (6) The condenser, now in its case, shall be again tested by applying to its terminals a voltage of 400 (R.M.S.) for a period of one minute. | ||