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).
Specifications for battery terminals, connections, sealing compound, and plate grids.
| Identifier | ExFiles\Box 168b\3\ img018 | |
| Date | 22th August 1928 guessed | |
| -3- Contd. (10) TERMINALS & CONNECTIONS. The cell to cell connections of each half battery shall be carried out by means of heavily lead covered brass nuts and kinked links which are arranged to allow the desirable small amount of longitudinal and lateral flexibility, it being understood that such connections are not broken after once having been made, unless it becomes necessary to replace a set of elements. Lock nuts shall be provided. The terminals of the battery shall consist of similarly heavily lead-covered brass nuts making flat surface connections to special terminals, made by R.R., attached to the cable ends - also lock nuts shall be provided. (11) SEALING COMPOUND. The cells shall be completely sealed over their tops. The compound with which the cells are sealed should be carefully chosen not to run down into the cells themselves at 100°F.{Mr Friese}, and not to be so brittle as to crack at the low temperatures likely to be experienced. (12) PLATE GRIDS. Amplifying the remarks re grids contained in (4) the outer periphery of the grid should be substantial enough to prevent this being eaten through and caused to break by overcharging. Further, the design of the grid frame-work should be such as to hold paste in place in the best possible way. It is desired to make it clear that, in making provision for this, in the case of a chassis battery, a certain amount of electrical efficiency must be given up to the more important feature of durability against combined vibration and overcharging. The grids should have rounded corners and the positive and negative plates should be provided with pairs of feet, those of the positive grids being out of line with those of the negative. The plates shall rest by means of their feet on four ribs in the bottom of the cell compartment, in such a manner that positive plates rest on one pair Contd. | ||