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).
Complete specification for improvements related to disc-covered wheels fitted with pneumatic tyres.
| Identifier | ExFiles\Box 147\3\ scan0164 | |
| Date | 30th November 1934 guessed | |
| 2 427,149 COMPLETE 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, NORMAN RYCHOFT, 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 and in what manner the same is to be performed, to be particularly described and ascertained in and by the following statement:— 15 This invention relates to disc-covered wheels fitted with pneumatic tyres each having a valve extension the free end of which is adapted to protrude through an opening or hole in the wheel disc or hub cap. 20 As is well known, there is a tendency during braking and acceleration of the vehicle for wheel discs and hub caps to creep rotationally on the wheel. If the extension is of a flexible nature the creeping action of the disc or hub cap will in a very short time pull the extension to pieces. If on the other hand the extension is of a rigid or semi-rigid nature the creeping action of the disc or hub cap will tend to loosen the connection between the extension and the valve and cause leakage. 30 In order to provide against these contingencies the present invention consists in the provision, either on the mounting for the disc or on the wheel itself, including the hub, of means for anchoring the free end of the valve extension. By means of this arrangement the anchored end of the extension is not only given a definite location on the wheel or hub, as the case may be, but it also functions as a creep stop for the disc or hub cap and thereby effectually prevents any damage to the extension or leakage at the valve. The arrangement also has the further advantage that in cases where the disc is normally held in position by the hub cap the anchored end of the extension will support the disc in position on the wheel when the hub cap is removed. 50 In order that the invention may be clearly understood and readily carried into practical effect, reference is made in the following description to the accompanying drawings, in which, 55 Figure 1 is a front view of so much of a disc-covered wheel as is necessary to illustrate one method of locating the free end of the valve extension. Figure 2 is a transverse sectional view 60 on the line 2—2 of Figure 1. 65 Figures 3 and 4 are detail views illustrating alternative methods of locating the free end of the valve extension. Figure 5 and 5a are front and transverse sectional views respectively showing one way of anchoring the free end of the valve extension to the wheel spokes. 70 Figure 6 is a view similar to Figure 5 illustrating a modification. Figures 7, 8, 9 and 10 are detail views showing further alternative forms of anchoring devices. 75 Figures 11 and 12 are views similar to Figures 1 and 2 illustrating an alternative of locating the free end of the valve extension. Figures 13 and 14 are detail views illustrating alternative methods of positioning the free end of the valve extension in the hub shell. 80 Like parts are designated by similar reference characters throughout the drawings. Referring to the drawings, a represents the valve extension which in itself is a well known device. One end of the extension is, as shown, provided with a collar a¹ screw-threaded internally for engagement with the usual screw-threaded portion on the tyre valve b. The free end a² of the extension may, as hereinafter stated, be located in or on the mounting c for the disc d.{John DeLooze - Company Secretary} For this purpose, as shown in Figures 1 and 2, the mounting c, which consists of an annular plate attached to the wheel, is formed with a slotted lug c¹. Alternatively, as illustrated in Figure 3, the mounting may be slotted c² for the reception of the free end a² of the extension. Again, in the modification illustrated in Figure 4, the mounting c is provided with a slotted bracket c³ bolted or secured thereto in any other suitable manner. The slot in each case is preferably radial and open at one end. In order to facilitate assembly of the disc mounting c so that the lug or bracket aforesaid shall always be at a predetermined circumferential distance from the valve b, a said mounting is provided, as shown clearly in Figure 1, with an indicator c⁴ or any other mark 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 is determined by the length of the extension a.{Mr Adams} In every case the disc d is formed with a hole d¹, as shown in Figure 2, through which the free end of the extension is adapted to protrude when the disc is in position. The arrangement is therefore such that when the said free end is in engagement with the disc d it will effectually prevent any tendency for the latter to creep rotationally on the wheel. In the alternative case where, as before stated, the locating means for the valve extension is provided on the wheel, advantage is taken of the wheel spokes e to provide a means of attachment for an anchoring device f.{Mr Friese} 15 In the example shown in Figure 5, the anchoring device comprises two plates f¹ bolted to a pair of spokes e and with an open-ended radial slot f² to receive the free end a² of the extension. In a modification, see Figure 10, the plates f¹ are of exactly similar shape and are bolted to the spokes e in the angles where the spokes cross each other. The anchoring device f may, alternatively, consist of a single plate adapted to clip onto the spokes (see Figure 7) and to clamp the free end of the extension in the angle formed by a pair of crossed spokes. 30 Figures 8 and 9, which represent respectively a front and a rear view of a single plate anchoring device f, illustrate a modification in which a single plate, adapted to clip onto a pair of spokes, is formed with an open-ended radial slot f³ for the reception of the free end of the valve extension. In this case, the plate is clipped onto the spokes at two places, viz. onto each spoke separately and onto the two spokes at the point where they cross each other. 40 In every case above described and shown in Figures 1—10 the anchored end a² of the extension is free to move to a limited extent in a radial direction before the disc d is placed in position on the wheel thus facilitating the registration of the said end of the extension with the hole therefore in the disc. 50 In the further development of the invention illustrated in Figures 11 and 12, the free end a² of the valve extension is passed through a hole h¹ in the hub shell h and is located in a hole h² in the inner piece h³ of the shell. Alternatively, as shown in Figures 13 and 14, the free end of the valve extension can be located in a radial slot h⁴ formed in the outer rim of the shell, Figure 13, or in an inclined slot h⁵ in the bridge. In each case the free end a² of the extension is adapted to protrude through a hole g¹ provided for the purpose in the hub cap g.{Mr Griffiths - Chief Accountant / Mr Gnapp} 65 The location of the free end of the extension in the hub shell can be used with advantage where, as shown in Figure 12, the wheel disc d is secured in position by means of an annular ring secured to the wheel spokes by means of a plurality of springs, or in any other manner in which the disc is not intended to be readily detachable. 75 The said extension may, as shown, have an auxiliary valve m at its free end in operative connection with the existing valve on the wheel rim so that the opening and closing of the auxiliary valve at the outside of the disc d or hub cap g causes a corresponding opening and closing of the existing valve b on the wheel rim. 80 In order to provide a close weather proof joint between the auxiliary valve and the hole in the disc, hub cap, etc., through which it protrudes, the former may be provided with a screwed collar m¹ adapted to take a seating, as shown more clearly in Figure 2, in a recess formed around the latter. A valve cap m² is screwed down on to the collar m¹ in every case. 90 Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is:— 95 1. A disc-covered wheel fitted with a pneumatic tyre having a valve extension, and provided, either on the mounting for the disc or on the wheel itself, including the hub, with means for anchoring the free end of the valve extension for the purposes described. 100 2. Disc-covered wheels according to Claim 1 in which the mounting for the disc is formed or provided with a slot, or a slotted lug or bracket for the reception of the free end of the valve extension. 105 3. Disc-covered wheels according to Claim 1 in which an anchoring device for locating the free end of the valve extension is secured to the wheel spokes. 110 4. Disc-covered wheels according to the preceding claim in which the anchoring device comprises a pair of plates bolted or otherwise secured and formed with a slot or hole for the reception of the free end of the valve extension. 115 5. Disc-covered wheels according to Claim 3 in which the anchoring device consists of a single plate adapted to clip onto the spokes and to clamp the free end of the extension in the angle formed by a pair of crossed spokes. 125 6. Disc-covered wheels according to claim 3 in which the anchoring device consists of a single plate formed with a slot or hole for the reception of said free end and adapted to be secured to the spokes. 130 7. Disc-covered wheels according to claim 1 in which the free end of the valve extension is arranged to protrude through | ||