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).
New fixing methods, including a 'pinch' fixing and a spring type speedometer clip for instrument installation.
| Identifier | ExFiles\Box 44\4\ Scan149 | |
| Date | 4th December 1929 | |
| Messrs.Rolls-Royce,Ltd., Date 4.12.29. Page 4 We have adopted a "pinch" fixing for the end of the armoured casing, in place of a screwed union and nut, for reason of lightness. Further, it prevents a large sized spanner being used on the size of nut necessary to pass over the armoured casing, and so strain the support or the instrument itself. The amount of free pipe line between the end of the armoured casing and the connection as at present used, would appear satisfactory. The pump can be conveniently fitted on the right-hand side of the gauge (viewed from the front). Spring type speedometer clip for securing instrument in facia board. Your finished car department has raised the point that the back strap is very difficult of entry in certain installations, where the gauge is fitted close up against the glove box in the facia board, support brackets or other instruments. We therefore submit for your consideration, a spring type of fixing, which we think will be more easily handled in installation. We would point out, however, that with this type of fixing, it is almost essential that the instrument be put through the front of the facia board as a complete unit, as the spring fixing strap would be almost impossible of entry by | ||