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).
Provisional patent specification for improvements to disc-covered wheels fitted with pneumatic tyres.
| Identifier | ExFiles\Box 147\3\ scan0163 | |
| Date | 9th June 1934 | |
| 1247 File B III wheels PATENT SPECIFICATION Application Date: June 9, 1934. No. 17131/34. 427,149 Complete Specification Left: Dec. 1, 1934. Complete Specification Accepted: April 16, 1935. PROVISIONAL SPECIFICATION Improvements in or relating to Disc-covered Wheels fitted with Pneumatic Tyres We, CORNERCROFT LIMITED, a British Company, of Ace Works, Queen Victoria Road, Coventry, in the County of Warwick and NORMAN RYCROFT, British Subject, of 6, St.{Capt. P. R. Strong} Patricks Road, and JOHN ALAN CORNER, British Subject, of "Fairfield," Earlsdon Avenue, both of Coventry aforesaid, do hereby declare the nature of this invention to be as follows :— This invention relates to disc-covered wheels fitted with pneumatic tyres and has for its object to enable the tyre to be inflated or deflated without disturbing the disc or any part thereof. The invention involves the use of an extension of the existing tyre valve and the provision of an opening or hole in the wheel disc or hub cap through which the free end of the said extension may protrude. Where the disc is clamped against the wheel and the valve extension is of a flexible nature it will be obvious that some provision must be made for locating the free end of the extension so that when the disc is in position the engagement therewith of the said free end of the extension will effectually prevent any tendency for the disc to creep rotationally on the wheel. For this purpose means for locating the free end of the valve extension may be provided either on the mounting for the disc or on the wheel itself. In the former case the said mounting, which may consist of an annular plate or spider attached to the wheel, may be provided with a slot or with a slotted lug, the slot in each case being preferably radial and open at one end. In order to facilitate assembly of the disc mounting so that the slot shall always be at a predetermined circumferential distance from the valve the said mounting may be provided with a mark or other indication which must register with the position of the valve when the mounting is assembled on the wheel. The distance between the mark and the slot will be determined by the length of the extension. In the alternative case where the locating means for the free end of the extension is provided on the wheel, advantage may be taken of the wheel spokes to provide a means of attachment for an anchoring device which itself may take a variety of different forms. For example, the said device may comprise a pair of plates adapted to be bolted or otherwise rigidly secured to the spokes and formed with an open-ended radial slot to receive the free end of the extension. In another form the said device may consist of a single plate adapted to clip onto the spokes and to clamp the said free end of the extension in the angle formed by a pair of spokes where they cross each other. In a further development of the invention the free end of the valve extension may be passed through a hole in the hub shell and adapted to protrude through a hole provided for the purpose in the hub cap. In every case it is desirable that the anchored end of the extension shall be free to move to a limited extent both in a radial and in an axial direction relatively to the wheel so as to facilitate the registration of the said end of the extension with the hole therefor in the disc or hub cap as the case may be. The said extension may have an auxiliary valve at its free end, means being provided whereby the opening and closing of the auxiliary valve at the outside of the disc or hub cap causes a corresponding opening and closing of the existing valve on the wheel rim. In order to provide a close weatherproof joint between the auxiliary valve and the hole in the disc or hub cap through which it protrudes the former may be provided with a screwed collar adapted to take a seating in a recess formed around the latter. Dated this 8th day of June, 1934. T. FLETCHER WILSON, LL.B., Fellow of the Chartered Institute of Patent Agents, National Provincial Bank Chambers, Coventry. Agent for the Applicants. [Price 1/-] | ||