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Патент USA US2283264

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May 19, 1942-
D. s. KENNEDY
'
2,283,264
'NONSKID DEVICE _
Filed Jan. 25, 1941
I
2 Sheets-éheet 1
May 19, 1942.
D_ $_ KENNEDY
2,283,264
NONSKID DEVICE
Filed Jan.
25, 1.941
_
I ' 2 Sheets-Sheet 2
Patented May 19, 1942
2,283,264.
UNlTED STATES PATENT OFFICE
.NONSKID DEVICE
Donald Stuart Kennedy, Longparish, Andover,
England
'
~
Application January 25, 1941, Serial No. 376,002
In Great Britain January 24, 1940
5 Claims.
This invention relates to overall chains or gir~
dles for use upon the tires of road vehicle wheels.
It relates more particularly to that kind of over
all chain or girdle which is composed of a series
(Cl. 152-225) .
of spaced-apart non-skid shoes connected by lat
eral retaining chains or other linking means.
The present invention has for its objects the
provision of anon-skid shoe which is self-clean
ing; which is effective on snow or ice-covered
surfaces: which will not become clogged or caked
with mud: which is robust in construction and
long Wearing: and which is adapted to open out
?at and therefore pack flat for transport when
not in use.
.
The principal feature of the improved non
skid shoe of the present invention is that the
tread member formed of rigid twisted metal rib
bon with flat tab-pieces at its ends, and having
side flaps hingedly connected with the ends of
said ribbon, is provided between each side flap 1
and the ?at tab piece, with a hinge connection
which includes a short inverted channel section
member having its central web secured to said
tab piece and its side walls apertured to form
bearing supports for the hinge pin of the side '25
flap.
The invention is hereafter described with ref
erence to the annexed drawings, in which: Fig. 1
is a front elevation of one form of the shoe, the
?at tab-piece being shown riveted to the under
side of the web of the short channel section piece.
Fig. 2 is a plan view of part of Fig. 1 and Fig. 3
is an end view of Fig. 1.
Fig. 4 is a front elevation of another form of
side) of the web d of the channel section piece
or member. The flanges or walls d1 of the chan
nel section piece are apertured to provide bear
ings for the hinge-pin e, the latter being shown
_ in the 'form of a bolt with nut e1.
The web d is
parallel to the axis of the hinge pin e and the
walls dldl are preferably rounded off adjacent
to the side ?aps 1‘.
These side ?aps ff are of the known kind and
are secured upon said hinge pin c with the nar- ,
rowedportion f1 of the ?ap positioned between
the inner faces of the flanges d1 so as to be mov
able about the hinge pin e. A portion of the
pneumatic tire T is shown in chain lines in Fig. 1.
These ?at tab-pieces‘bb are aligned with one
another in axial prolongation of the helical
twisted member a and are shown projecting
slightly beyond the channel section piece; they
are parallel or substantially parallel with the axis
of the hinge pin e.
The hinge connection between each side ?ap f
and the twisted bar a is thus eifected by a short
inverted channel section member having its cen
tral web 11 secured to the flat tab-piece b and its
side-walls dldl apertured to form bearing sup
ports for the hinge pin 6.
The shoe is provided with means for limiting
the inwards movement of the side ?aps ff and
in the form illustrated, I employ stop pieces hh
for that purpose. The stop piece It is shown con-'
sisting of a ?at member h with cranked ends or
lugs hlhl apertured to ?t the hinge pin 6, this
stop piece extending along the internal angle
between the twisted element a. and the flap 1‘.
the shoe, the ?at tab-pieces being made integral 35 The edges of the member 71. can engage against
with the channel section pieces. Fig. 5 is a plan
the helical bar a and side flap f, and thus stop
view of the tread portion before it is ?nally
any inwards movement of the hinged side flap f.
shaped and Fig. 6 is an end view of Fig. 4. Fig. 7
The shoe is also shown provided with lateral
is a sectional elevation of the bushings employed
retaining
chains ii of the known kind, the end
in this form of side ?ap, Fig. 8 being an elevation 40
links being secured in the loops F? of the hinged
of said side ?ap and Fig. 9 a cross section of said
?ap, showing its hinged attachment to the chan
nel section piece.
?aps ff.
This improved construction of overall shoe is
more especially advantageous when used on a
Fig. 10 is an end view showing another form
of channel section piece. Figs. 11 and 12 are 45 wheel travelling upon snow or ice and it is equally
good when the wheel has to pass over mud or
end views showing two forms of built-up channel
soft ground. It is to a great extent self-cleaning
section pieces. Fig. 13 is a perspective view of
in use and when not in use it opens out or packs
a stop piece to limit the inwards movement of
the side flaps.
flat for transport. The side ?ap f at the right
In the arrangement of Figs. 1, 2 and 3, the 50 hand of Fig. 1 in chain lines indicates the packed
?at position.
.
transverse tread portion consists of a metal rib
bon a rigid throughout its length and having a
It is to be noted that the tread portion is a
plurality of twists to form a helical member, and
twisted metal ribbon a and that its ?at tab
extremital ?at tab-pieces bb which are shown
pieces bb at the end of the said twisted member
secured by rivets ccc to the under side (inner 55 are each substantially parallel with the axis of
2
2,283,264
the hinge pin e carried by the short channel sec
tion piece.
As compared with the shoe described in my
prior Patent No. 2,095,523, I now employ a single
twisted metal ribbon or element a, the ends of
which are not traversed by the hinge pins but
are formed as tab-pieces bb substantially parallel
to said pins and each secured to the web 11 of
?ap f I employ in this arrangement not a stop
piece h but a shoulder f4 formed on the side
?ap 1‘ adapted to engage the cam-like edge (14
of the downturned flange d3; see Fig. 41.
Instead of forming the channel section piece
with a web d and two side ?anges d1, it may be
crenated at the corners as shown in Fig. 10 to
enable the flanges dldl to be separated further >
and to permit the use of a longer hinge pin e.
the channel-section piece which also provides in
its ?anges dldl the bearings for the hinge pin. 10 In the arrangements of Figs. 11 and 12, the
channel section member ddldl is strengthened
The single twisted member is self-cleaning and
does not become packed or bridged by snow in
wintry conditions.
The ?at tab-pieces bb upon the twisted metal.
element a, in conjunction with the channel sec
tion pieces to the middle portion or web d of
which the tab pieces are secured, and the mount
ing of the hinge pins e in the ?anges or side
walls d1 of said channel-section member, pro-g
vide a robust and effective construction capable
of withstanding hard wear and well suited to
the purposes in view.
.
or reinforced by an outer channel section mem
ber having a web Z and sloping or cranked walls
Z111, the web I being juxtaposed on web at and
both being riveted together. The walls 11 a?ord
additional bearings for the hinge pin e. There
. are no bushings employed in these arrangements '
- but a longer bearing for hinge pin 6 is provided.
The lugs or sides hlhl of the stop piece are
shown outside the outer channel section member
111. In Figs. l0, l1 and 12, an extra metal wear
ing piece g is shown securedby the rivets cc to
the web of the channel section member.
Fig. 11 also shows a T-shaped member mml,
The axis of the hinge pin 6 is preierably'in
line with the inner edge of each spiral of the
twisted member'and the ?anges (11d1 are rounded 25 with its. head m below the tab-piece b and se
cured thereto by the rivets cc, the stem m1 ex
off at the end remote from the web (1, concen
tending into a recess or slot in the side ?ap and
trically with the axis of the hinge pin 6.
providing an additional bearing for the hinge
The spirals of the twisted member are con
pin c.
tinued up to the channel section piece and it is
Having thus described my invention, I claim:
to be noted that when in use and the twisted
1. A non-skid shoe for an voverall chain and
ribbon or member a is making contact with the
of the kind comprising a transverse tread por
ground, its respective ends or tab-pieces are in
tion with side ?aps and hinge pins connecting
the form shown in Figs. 1, 2 and 3 protected from
said ?aps to the ends of said tread portion, said
the ground by the webs d of the channel section
flaps having limited inwards movement, in which
pieces and are thus not directly exposed to the
ground.
'
'
Instead of form-ing the channel section pieces
separate from the tab-pieces, they may be made
integral, as illustrated in Figs. 4, 5 and 6. The
construction there illustrated shows the tread
member a provided with integral ends or tab
pieces I)’ which include a ?at, central portion (12
and laterally extending portions d3d3, these por
tions corresponding generally in shape and func
tion to the Web (1 and ?anges d'd’, respectively,
of that form of the present invention shown in
Figs. 1 to 3 inclusive; it also shows a tread plate
projection 9' as a continuation of the flat, cen
the said tread portion is formed as a metal bar
having a plurality of twists in its length and ?at
tab pieces at its ends, said tab pieces being
aligned with one another, inverted channel sec
tion pieces to the middle members of which the
said tab pieces are secured being apertured in
their Walls to receive said hinge-pins, and the
middle member of each channel section piece
being parallel to the axis of the respective
hinge pin.
.
2. A shoe for a non-skid device of the char
acter described, comprising a tread member
formed of a straight metal ribbon having a plu
rality of twists in its length, ?at tab pieces at
tral portion d2 of the tab-piece b’, said projec
tion 7‘ having, if desired, lugs 7'1. When‘ ?nally 50 the ends of said ribbon, channel section mem
bers covering said tab pieces, the web of each
shaped from the form in Fig. 5 to that in Fig. 4,
channel section being riveted to the respective
the ?anges (Z3013 are bent down at right angles
tab piece, detachable parallel hinge pins extend
to the ?at, central portion 012 of the tab-piece b’,
ing in parallel relation through the ?anges of
and the tread plate projection is turned in the
opposite direction to the ?anges d3d3 to extend 55 said channel section members, and side ?aps
hingedly mounted on said hinge pins, said tab
partly over the ?at, central portion (12. This
projection 7‘ is a thickening piece to reduce wear
upon the side ?ap f and hinge pin 6 and it is
preferably brought level at its top with the top
pieces being aligned with one another upon the
axis of said twisted ribbon and substantially
parallel with the axes of said hinge pins.
3. A shoe for a non-skid device comprising a
of the twists, as shown in Fig. ii. The lugs 7'111'1 60
tread portion formed of rigid twisted metal rib
when employed would increase the width of the
bon adapted to be'set across the tire tread and
tread plate projection y‘, by extensions fore and
having extremital ?at tab pieces, a channel sec
aft of the latter.
tion piece at each end of said twisted ribbon and
In this form of construction, the hinged side
?ap has a wider bearing upon the hinge pin e 65 formed integrally with said tab piece and ribbon,
hinge pins mounted in the side walls of said
by reason of the provision of the outer pin-en
gaging loops or joints f3f3 as well as the inner
integral
channel ' section
pieces,
a
side
?ap
hingedly mounted on each of said hinge pins,
portion f1 and bushings kkl mounted on the
and a tread plate projection also formed in
longer hinge pin e. The side ?aps if, as clearly
shown in Figs. 8 and 9, are recessed to allow the 70 tegrally with the web and tab piece at each end
of the twisted ribbon, said tread plate projection
?anges or side walls d3d3 of the channel section
being bent over said web and level at its outer
piece to enter and the longer bushing is obvi
edge with the outer edge‘ of the said twisted
ously located between the ?anges 11301.3 of the
metal ribbon.
channel section piece.
4. A non-skid shoe including a tread member
To limit the inwards movement of the hinged
2,283,264
formed of twisted metal ribbon and having ?at
tab pieces at the ends of said metal ribbon, side
?aps hingedly connected with said metal ribbon
and means for limiting the inwards vmovement
of said side ?ap, the hinge connection between
each side flap and the ?at tab piece being by
means of an inverted inner channel-section
3
tread'portion formed of rigid twisted metal rib
bon adapted to be set across the tire tread, a
channel section member at each end of said
> twisted ribbon and consisting of a central portion
and cranked, apertured ends, hinge pins mounted
in the ‘apertured ends of said channel section
members, side flaps mounted upon said hinge
pins, and flap-limiting stop vpieces mounted on
said hinge pins, each of said stop pieces consist
member having its central web secured to said
tab piece and its side walls apertured to form
bearing supports for the hinge pin oi the side 10 ing of a central portion and cranked ends aper
?ap, and an outer channel-section member hav
tured to ?t the hinge pins, and the central por
ing its web secured to the web of the inner chan
tions of said channel section members and said
stop pieces extending substantially parallel with
nel-section member, with the side walls of the
outer channel-section member splayed outwardly
the axes of said hinge pins.
and also supporting the said hinge pin.
15
5. A shoe for a non-skid device comprising a
DONALD STUART KENNEDY.
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