US1909803A - Antiskid chain - Google Patents

Description

Patented May 16, 1933 UNITED STATES GILEs A. BECKWITH, oF WATERFORD, CoNN-EoTICT i.

ANTISKID CHAIN Application inea November 9.1931. ,serrer 110.573,800.y 'l l l My invention relates to anti-skid chains such as are employed onV automobile tires, etc., and particularly to those portions of the chains which engage the roadway.

One object of my invention is to provide a chain that is of longer life than various types of chains heretofore employed.

Another object of my invention isto provide a chain which possesses superior antiskid properties.

Still another object of my invention is to provide an anti-skid chain possessing the advantages above-named, and which is nevertheless of comparatively simple construction.

Some of the forms which my invention may take are shown in the accompanying drawing, wherein Figure 1 is a plan View showing the road-engaging surface of a cross chain; Fig. 2 is a side elevational view thereof, and Fig. 3 is a View similar to Fig. 1, but showing a modified form of chain link.

Referring first to Figs. l and 2, portions of the usual side chains or tension members are indicated by the numerals 4. The side chains 4 are connected at intervals by cross chains that extend across the tread of the wheel. Each cross chain includes tread links 5 which are shown as of approximately circular form, and each of which is twisted for a distance of approximately 180O to permit the links to lie substantially in a common plane, in a manner well-known in the twisted link art.

The bends formed in the links at points where they cross one another extend outwardly from the mid plane of the links at diagonally opposite points, as indicated at 6 and 7, for exam-ple. Ordinarily, the links tend to wear through rapidly at these points, and

furthermore there is tendency for these curved protrusions to slip on the roadway. Metal bars 8 are welded to the links at diagonally-opposite low points thereof, while the bars 9 extend diagonally of the links and are welded thereto at points adjacent to the raised or protruding portions 6 and 7 of the links, the bars 8 and 9 preferably being of polygonal form in cross section.

The bars or calks 9 serve not only to more effectively resist skiddng than links which are not provided witli"calks,f'but also'increasev the life ofthe links,'becau'se the-'links will not begin to wear untilltheffcalksQ are worn entirely through o rgnearly through.

lVhile the major portion ofthe calks 8 are not subjected to wear untilthe bars 9 have been worn nearly through, the ends thereof, by reason of the rocking tendency of the chain under tractive or braking forces of the slipping of the wheels. When the bars 9 have been more worn through, the bars 8 will not only relieve the linkspof considerable wear, thus further lengthening the life thereof, but they will, by reason of their diagonal positions, resist skidding, land will increase the tractive quality of the chain.

Referring now to Fig. V3, I show a structure similar to that of Fig. 1, but wherein the tread links 10 have loop-like extensions ll, the links or their extensions, or both, being twisted to permit the links to lie` in substantially a.y common plane. In this case,

bars or calks 12 and 13 are provided that the wheels, and the openings through the 8 links between the bar-like calks are not so small that they become readily clogged with snow.

If desired, the bars may be welded together at the points where they cross one another.

I cla-im as my invention l. An anti-skid cross chain comprising links of approximately circular form but having loop-like extensions, the extensions of adjacent links being directly connected and the links being twisted at said extensions to y cause the links to lie in substantially a comy mon plane, a bar-like calk secured at its ends to each of said links at the raised portions of the links which result from the twisting wheel will bite into the roadway and resist f thereof, and a bar-like calk secured at its ends to each of said links at depressed portions of the links.V

2. An anti-skid cross chain comprising links of approximately circular forni but f having loop-like extensions, the extensions of adjacent links being directly Connected and the links being twisted at said extensions to cause the links to lie in substantially a coniinon plane, a bar-like calk secured at its ends to each of saidV links at the raised por`` tions of the links which result from the twisting thereof, and a bar-like calk secured at its ends to each of said links at depressed portions of the links, the calks of each link lying in crossed vrelation to oneanother.-

1 In testimony whereofl, the said Guns A" BEGKWITH have hereunto set my hand.

G'ILES Ar BECKWITH.

.es f

Images