Show I Air Cells C ll Prevent lire 1 ire Punctures Punctures' A RUBBER tire tiro for automobiles A t-t t that is tubeless s and puncture- puncture proof yet resilient has just just- been patented patented pat pat- by T Thomas Thorna o s C. C Watkins of dt f Ingram Ingram Ingram In In- gram Pittsburgh gh The outward appearance o of the tire is ii identical with that of the regular pneumatic product For a given car it Tire its half naIf opened showing tile the system of 01 air ir cells and cones that make aake it if puncture proof yet vet et resilient I has the same diameter and may oe ne molded with any tread The The inside is however different different It is made mad up of oblong cells with rounded cor cor- ners In each o of these cells is a cons con of solid livo live rubber with its base baso toward toward toward to- to ward the centre of the wheel and its it rounded point toward the outer cir cir- cir cir- When the weight at a 3 given point exceeds that which the tha thick walls will carry the point of the cone comes into play As the pressure pressur increases a greater area o of the cone comes into play Each of thu tho cells the cells the number of which depends upon the circumference ence Is ence-Is is vented by two small holes It Ii the blow on the tire is sudden a aa a. would be the case if it ran into a road rut or hit a stone the air comes mb int play also The holes are of a size to permit the air to escape slowly thus sustaining rigidity at the time when U it is needed As the compressed section sec tion regains its normal shape fresh air airis airis airis is drawn in and thus the tire is ventilated ventilated ven yen and cooled I 1 in the warme weather One section of the tire might be damaged without throwing the tile remain remainder der out of Commission This would be a great advantage in military vehicles ve ye- hides fire apparatus funeral cars can Mr r. Watkins evolved his idea more than two years ago Since that time he be has been at work with engineers familiar with rubber manufacture manu manc- facture perfecting the design of the cells that the proper strength strength and thickness a of wall might be accurately accurate accurately figured out He has now v completed the tho moulds maulds that are necessary necessary for fa making the tire I c section of 01 tire Ure tr through one lIe of 01 the tile theair theair air cells showing the rubber cone projecting therein |