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 cells and containers to prevent short-circuiting and improve handling.
| Identifier | WestWitteringFiles\U\May1930-July1930\ Scan138 | |
| Date | 9th July 1930 | |
| EFC9/AD9.7.30 contd. -2- .4 mm. thick at every point, both modifications being with a view to preventing short circuiting at the edges and by pressing through the separators. Modification of top outline for plates on the Exide cell. This modification consisted in an alteration of outline by which the clearance between the tops of the positive plates on the negative lug was increased with a view to eliminating, as far as possible, failure of the cell by short circuiting of the top positive plate on to the negative lug. Widening of handle slots on both the Exide and P & R moulded ebonite containers. We suggested this modification with a view to enabling three fingers to pass through the slots for carrying purposes instead of only two as previously, and both makers agreed as to its suitability. These handle slots provide a certain amount of ventilation to the tops of the batteries when the lids are in place, and the amount of ventilation was somewhat increased by this modification. The resulting position of the handle slots crosswise on the battery is not central, but as the two slots are displaced in different directions from the centre, this does not affect the carrying of one of these 6-volt units. | ||