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).
Analysis and description of the construction of a Delco Packard ignition condenser, including a diagram.
| Identifier | WestWitteringFiles\G\June1921\ Scan32 | |
| Date | 15th June 1921 | |
| Handwritten notes (top): FOR R, EFC STRIPS, ANALYSES & MEASURES A DELCO (PACKARD) COIL (IGN. CONDENSER). IT COMPARES WITH AN R-R PRODUCT. Stamp: ORIGINAL To R.{Sir Henry Royce} from EFC. c. to CJ. c. to Da.{Bernard Day - Chassis Design} X.4284 - DELCO PACKARD IGNITION CONDENSER. Answering your E2/G28.5.21, this condenser has been removed from the Packard car and examined. It has a dielectric of paraffin wax paper. It appears to have been made with two long strips of dielectric, interleaved with two similar strips of foil. These have been wound up so as to have the cross section of a long rectangle which again is folded into three, S shaped, and compressed to fit the box, into which it is fitted with a wrapping of fabric, and the space over the connections sealed with a resinous substance. (See diagram in which the single line represents the two foils and two dielectrics first laid together). [S-shaped diagram] The terminals are connected at points which apparently before winding would be within about 6" of each other and at one end of the strip; the connection of all the plates of one pole in the usual form of condenser being absent. Owing, however, to the compact nature of the condenser, we think that in spite of this method of connection, resulting in the fact that the charge running in and out of Contd. R R 5307 (1100) | ||