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).
Modifications to battery design and an examination of a new Tudor battery.
| Identifier | WestWitteringFiles\F\March1921\ Scan31 | |
| Date | 7th March 1921 | |
| Contd. -2- EFC3/T7.3.21. 3. The wood separators have been made larger so as to project beyond the edges of the plates and it is now considered that this will render the possibility of short circuits due to buckling of plates to be very remote. 4. The corners of the plates are now rounded instead of being sharp. 5. The negative plates are a little thinner than previously. 6. An improvement has been made in the lugs and in the manner in which these are passed through and secured in the cell lid.{A. J. Lidsey} 7. The sealing-in of the cells is effected in a modified manner in which the sealing material is run in after the cells have been placed in the battery (instead of individually), so that the cells are held rigidly by this material, the packing pieces having first been placed at the sides of the cells so that the sealing material is only of small depth. This is a sort of compromise between completely sealing the cells in the case and having the cells quite separate as before and still is supposed to allow of the possibility of removing a cell for replacement although we have not found this to be easily done. 8. The result of these modifications is that the battery now weighs 3 lbs. lighter than previously. We have received three batteries with these modifications from one of which the two cells have been taken for examination. X.979 Tudor Battery. We have received two batteries from the Tudor Co. from one of which two cells have been taken for examination. Four such batteries were ordered from the Tudor Company as a result of our visit to them in September last in which all the points we require were discussed with their Mr. Harrison. All these points were set out to them in detail in our letter of Sept. 24th last. The following points are incorporated in the new Tudor batteries:- 1. The plates are of their C.L.C. type, there being nine plates per cell. 2. The cell to cell connecting links are of the burnt up pattern, apparently of solid lead, although it was arranged with them that they should have embedded copper conductors | ||