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).
Proposal by Mr. Royce for a modified Woodmilne tyre pump connection and washer.
Identifier | ExFiles\Box 31\1\ Scan226 | |
Date | 5th May 1921 | |
To Ds. from E.{Mr Elliott - Chief Engineer} Copy to EG. NOR. HE. E.O. X1405 He E5/G31/5/21. RECEIVED X1405 RE WOODMILNE TYRE PUMP CONNECTION. We send you herewith drawing No. LeC.1397 showing a modified tyre pump connection proposed by Mr. Royce. The standard Woodmilne nipple has a leather washer centrally spigotted only. When used with a tyre valve of small bore the leather becomes compressed, and the spigot bears hard on the valve forming a metal to metal joint. When the male piece is the full size of the washer, and has a bore large enough for the spigot to enter, as in some adaptors for American tyre valves, then the soft leather washer becomes permanently spread, and jams itself in the bore of the union nut. Mr. Royce's modification is to confine the washer both internally and externally, and to make the internal metal spigot small enough to enter the valve. Also, the union is provided with a left hand threaded nut enabling the nipple to be withdrawn so that the washer can be replaced when required. The washer is specified in hard quality fibre instead of leather, and the drawing also shows dotted the standard construction of the Woodmilne union nut. Mr. Royce would like you to send him two of these modified connections to West WitteringHenry Royce's home town, and would like the advantages of this modification brought before the Woodmilne Tyre Pump Company with a view to R.R. owners benefitting thereby. The union nut of the tyre pump of chassis 6 EX. became absolutely useless due to being jammed up tight, so it was split in two with a hack-saw, when it was found that the leather (Contd.) | ||