Design and construction details for the Delco-Remy ignition coil.
| Identifier | ExFiles\Box 164\5\ img093 | |
| Date | 3rd November 1931 guessed | |
| PARTICULARS OF DESIGN AND METHOD OF CONSTRUCTION OF THE DELCO-REMY IGNITION COIL (a) Iron Circuit. Square section made up with 22 soft iron strips 4" long .330" wide .025" thick. Iron sheath, perforated in slats same dimensions as core strips, wound round outside of the coil. Length 12.875". Weight of core and sheath 7 ozs. (b) Primary winding. Wound with 5 layers of 25 S.W.G. S.C.C. wire Weight 3¾ ozs. (c) Secondary winding. Wound with 42 S.W.G. enamelled wire. Wound next to the core. (d) Primary insulation. None between layers. Several turns of varnished paper round outside of primary. (e) Secondary insulation. Unable to determine whether varnished or wax paper as coil was badly charred. Extra insulation on first layers. (f) General. Coil supported on porcelain base in a sheet metal case with a bakelite terminal plate at top for H.T. and L.T. terminals, the former being brought out centrally. Coil impregnated in bitumen. | ||
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).