US1132898A

US1132898A - Wheel-rim for holding pneumatic tires.

Info

Publication number: US1132898A
Application number: US67982112A
Authority: US
Inventors: Herbert Austin
Original assignee: Individual
Current assignee: Individual
Priority date: 1911-04-20
Publication date: 1915-03-23
Anticipated expiration: 1932-03-23
Also published as: GB191109580A

Description

H. AUSTIN.

WHEEL RIM FOR HOLDING PNEUMATIC TIRES.

APPLICATION TILED 513.26, 1912.

1,1 32,898, Patented Mar. 23, 1915.

UNITED s'ras Fstca WHEEL-RIM FOR HOLDING PNEUMATIC TIRES.

Specification of Letters Patent.

Iatented Mar. 23, 1915.

Application filed February 28, 1912. Serial No. 879,821.

T all whom it may concern Be it known that I, HERBERT AUSTIN, a subject of the King of Great Britain, and residing at Bromsgrovc, infltlge county of lVorcester, England, engineer, have invent ed certain new and useful Improvements in WheeLRims for Holding Pneumatic Tires, of which the following is a specification.

According to a type of wheel rim which has been used for holding a pneumatic tire, a detachable ring, for use in holdingpne edge of the sheath of the pneumatic tire in place, has been slipped on around the'soleplate of the rim. This ring has been held from slipping back, under the pressure tending to force it outward when the tire has been inflated, by a steel ring, split at one side, which has. been sprung into a groove formed around the sole-plate of the rim.

The split ring projects from the groove and forms an abutment against which the first-- mentioned ring is forced by the inflation of the tire. There is some liability of'znoisture and dirt gctting in between the two rings and working their way into contact with the pneumatic t be; and there is'soine liability that in opening out the abutment ring, in removing it from the groove, a permanent set will be given to it which will prevent it holding itself by a n elastic grip around the bottom of the groove, when placed therein. Now, with a view to obviate the in'con vcnicnces referred to, a packing ring or length of rubber, or of other suitable soft packing material, and conveniently of a round section, is substituted for the split ring above described, substantially half of it, being let into a groove of the sole-plate'of the rim which is of suitable cross-section to receive it for the purpose required, and the outer -lbwer corner ofthc ring which is slippcd over tho solo-plate is shaped in crosssection to bed snugly against the projecting: portion of the. packing.- The packing, if in the 'form of an extensible ring. ma; vbe readily stretched sulliciently to enable into be removed from its groove and replaced therein, and whether in the form of a ring or a length of which the ends arebrougbt around together, makes a thoroughly water and dirt tight joint between itself and its groove and between itself and the ring which is slipped over the sole-plate of the rim. This packing may be strengthened by a core of canvas or the like, or may have n vire embedded therein which, when the after which its axis would be brought to co incide with the axis of the wheel and the ring would then be moved outward into a seating formed therefor in the outer side of the groove.

engage with e beaded or thickened edge of the sheath in the manner in which a bended or thickened edge of a sheath. is commonly engag d by a turned-over edge of a rim, tin ebv securely holding it both: from givin pre s sidewise only against a wired edge of a. r oath prevent such edge from giving out sidewise while the tire is being inflated,

the wiring preventing it from expanding cireumfercntially under the inflation.

In order that the invention may be clearly understood, I will now describe practical applications of the same which are illus trated, by way of example, by the drawings herewith, of which Figure l is a trans erse section through the tire sheath and wheel rim, in a case in which the edges ofthe sheath are unwired. l ig. J is 1-. corresponding view to Fig. 1 showing a sheath with wired edges, and Fig. 3 is a section through the rim and the packing ring in the case of a ring having a flexible but non-extensible core.

Referring first to the application of the invention shown by Fig.1, the-sheath A is of any ordinary or convenient character, having; thickened edges a one of which fits under a turned-over edge b of the rimB and the otherof which fits nnder s corresponding portion 0 of a ring C which is adapted to be slipped over the sole-plate b of the rim. A groove 15'" formed Within the periphery of the solaplate 0'' close .to the outer edge thereo C has been pushed with lent-2y across the sole-plate of the rim to admit thereof, a

packing (I, of soft jointing material which i conveniently in the form of a ring, is insert a. .se or expanding circumferentially the tire is inflated, or may be adapted to and, after the ring The ring which is slipped over the soleplate of the rim may be adapted eithertoed within the groove 6 leaving substantially half thereof standing out from the groove. The ring C is formed, as seen in section, with a hollow c which, as such ring is pressedoutward by the inflation of the tire, beds against the portion of the packing d which stands outward from the groove 6 and thus insures a thoroughly moisture and dirt tight joint between the rim and the ring G. A tool is shown in this figure for use 'infforizing the ring 0 inward after the tire has been deflated, or sufliciently so to permit thereof, for the purpose of removing the packing d from the groove b and allowing the ring C to be removed from the rim so that the tire can be removed from around the wheel. This tool comprises a yoke E which engages, as shown, with the rim at one side thereof, and passes over-the tire to a pivot connection e with a two-armed lever of which one arm f may be forced at its free end, by turning the other arm f, -'against'the ring C in a direction to force such ring in as required. A single tool may be used for forcing the ring (3 inward at different points in succession around its cir cumference, or two or more of such tools may be employed for simultaneously forcing the ring in at different points.

Referring now to the application of the invention shown by Fig. 2, the wires 9 which are inserted in the edges of the sheath A. insure that such edges can not elongate, and it is therefore necessary simply to prevent these edges moving sidewise under the inflation of the tire. The side I) of theJrini B forms simply an outward flange around the sole-plate b of the rimpagainst which a. flat side of the corresponding edge of the sheath abuts, and the ring C is formed with a flat side a to form an abutment for a flat side of the corresponding edge of the sheath, but it is preferred to form the inner edge of this flat side 0 with an inward rounded projection a which presses somewhat into the material of the edge of the sheath and gives. additional security against theentrance of moisture'and dirt into the tire. Except for these features, this form of the invention is the same as that described with reference to Fig. l.

Referring now to the modification of the invention shown by Fig.3, the groove 6 is shown to be of considerable depth and the packing ring d, of soft jointing material which has a flexible but non-extensible. core d, is first passed down into the bottom of the groove of. the wheel, as shown, and can then'be passed around over the edge of the groove throughout theremaining portion ofthe circumference df the wheel. then moved so as 'to' be central with; the

wheel and moved outward against a curved" seat in the outer side of the groove, as

' the ring C.

projecting rom the move at one part-of the circumference creased security against moisture and dirt 7 getting in between the ring C and the packing, the ring C is formed to fit around a portion of the outer side of the packing when the packing is within the hollow of The packin will yield sufliciently, as the ring C is orced back under the inflation of the tire, to allow the outer edge of the hollow of the ring 0' to pass over the portion of the packing which projects farthest from the groove 1).

Having fully described my invention, what I claim and desire to secure by Letters Patent, is

l. [n a wheel rim for holding a pneumatic'tire, a sole-plate, an abutment at one side of the sole-platefor supportin one side of the pneumatic tire, a ring whic may be slipped over the sole-plate at the other side of the pneumatic tire, a groove running around the outer surface of the sole-plate at the side thereof over which the ring is slipped, and an endless packing of elastic waterproof jointing material which is partly within the groove and partly projects therefrom and against the projecting portion of which the rin is pressed by the inflation of the tire, where y the said packing acts as an abutment for one side of the tire and prevents moisture and dirt from getting in be tween the rim and tire.

2. In a wheel rim for holding a pneumatic tire, a sol -plate, an abutment at one side of the sole-p ate. for supportin one side of the pneumatic tire, a ring whic may be slipped over the sole-plate at theother side of the neumatic tire, a groove running around the outer surface of the sole-plate at the sidethereof over which the ring is slipped, and a continuous packing ring of elastic waterproof material which may be stretched to pass it over the sole-plate and then allowed to contract to tighten itself within the oove leaving a portion thereof which resists the outwardthrust of t e firstmentioned ring.

3;?1'11 .a wheel rim for holding a pneu- "matictira'a sole-plate, an abutment. at one guide of the sole-plate for supportin (of the'pneumatic tire, a ring whic may be one side slipped 'over the sole-plate at the other side "of the. pneumatic tire, a groove running around the outer surface of the sole-plate at the side thereof over which the ring is slipped, and an endless packing of waterproof elastic material which is within the groove and partly projects therefrom, the projecting portion resisting the outward thrust of the ring and the said projecting portion of the packing formed with a rounded surface as seen in transverse section, and the ring formed with a hollowed surface, to bear against the packing, which is sha cal to pass over th portion of greatest pro1ection of the packing and fit around a portion of the outer side thereof.

4. In a wheel rim for holding a pneumatic tire, .a sole-plate, an abutment at one side of the sole-plate for supporting one side of the pneumatic tire, a ring which may he slipped over the sole-plate at the other side of the pneumatic tire, a groove running around the outer surface of the soleplate at the side thereof over which the ring is slipped, a seat in the outer side of the groove the inner edge of which is farther from the axis of the wheel than is the bottom of the groove, and a packin ring having a surface of elastic waterproof material and a nonextensible core, said groove being of such depth that the packing ring can be first passed down into the bottom thereof at one part of the circumference of the rim and then be passed over the edge of the rim throughout the remaining portion of the circumference thereof and then he brought into position concentric with the rim and with a portion of the packing projecting beyond the rim around the entire circumference thereof, the packing then resisting the out ward thrust of such first-mentioned ring.

In witness whereof I have hereunto Signet? my name this 14th day of February 191:5; in the presence of two subscribing witnessesv HERBERT AUS FIN. Witnesses BENJAMIN Broom GARDNER, Rouse-r G. GROVES.