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Патент USA US2107517

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Feb. s, 1938.
Filed Aug. 28, 1937
vb/m' 6.5).)7/0/9
Patented Fch. 8, 1938
John 0. Bishop, Savannah, N. Y.
Application August 28, 1937, Serial No. 161,387
1 Claim. (Cl. 24-494)
My invention relates generally to improvements posite ends to a- buckle C and a tail plate D, the
in anti-skid chains for motor vehicle tires and
more particularly to an improved form of buckle
or fastener for holding the chains in place.
In anti-skid chains of the emergency type or
of the form in which a short length of double
chain is wrapped around the tire and secured
by a fabric strap and buckle it has been found
that the buckles at present employed are in
10 adequate in that they very frequently become
loosened and allow the chains to fall from the
tire and become lost. Also the buckles at pres
ent, in the attempt to secure a positive fasten
ing, pinch the fabric end or strap so tightly that
15 it is abraded and out and rapidly becomes use
It is therefore the main object of my inven~
tion to provide a fastening or buckle which will
positively hold the chain in place on the tire
'20 and which will not out or otherwise ruin the
A further object is to provide a buckle of this
kind which is simple and durable in construc
tion and comprises simply a buckle plate hav
25 ing a channel to accommodate the strap and a
pressure plate or pad to engage the strap, and a
buckle tongue or clamp including a cam to press
the pressure plate tightly against the strap and
having a lever slotted to pass the strap end which
30 is passed therethrough to prevent the tongue from
releasing the pressure on the strap.
With these and other objects in view the in—
vention resides in the novel construction and ar
rangement of parts as hereinafter fully set forth
CO 01 and claimed, reference being had to the accom
panying drawing as showing a preferred embodi~
ment of my invention for purposes of exempli?
In the drawing:
Figure 1 is a cross section of an automobile
Wheel and tire showing a chain with my im
proved buckle in use.
Figure 2 is an enlarged plan view of the buckle
and associated parts, the buckle being shown in
locked or fastened position.
Figure 3 is a section along the line 3—-—3 in
Figure 2.
Figure 4 is a perspective view of the buckle
tongue alone.
Figure 5 is a perspective view of the pressure
plate or pad alone.
Referring now with more particularity to the
drawing the reference character A designates an
emergency chain of the usual form comprising
two short lengths of chain B connected at op
latter carrying a length of ?exible fabric strap
The chains B are placed across and around
the tread of the automobile tire F and the strap
E is run across the inside of the wheel felloe G
after which it is passed through the buckle C
and pulled tight, this being the usual arrange
ment of the chain.
My invention relates to improvements in the
buckle C and, in accordance therewith, the buckle 10
comprises a buckle plate 6 of T-shape including
laterally extended wings l which are slotted as
at 8 to receive the end links of the chains B.
The stem or shank 9 of the buckle plate is turned
up along its opposite parallel margins to form
spaced mounting ears ID and provide a valley or
channel ll therebetween and through which the
strap E may pass. Near one end each ear 20 has
a slot i2 and, at some distance from each slot
and spaced further from the stem 9 of the buckle
plate, an aperture is is formed in each ear. At
their oppoiste ends the ears have ?ngers, legs or
catches It turned inward over the channel ll
parallel with the face of the stem 9 and which
terminate considerably short of meeting across
the channel as shown in Figure 2.
A pressure or clamp plate or pad I5 is provided,
the same being of rectangular shape in plan
and there being short trunnions or pivot studs
t6 extended laterally from one end of the pad.
These trunnions 16 are entered in the slots l2
of the ears Ill and the pad l5 then ?ts down into
the channel I I, being of such width as to ?t nicely
therein. The end of the pad carrying the trun
nions l 6 is hereinafter, for convenience in descrip
tion, termed its frontal end and it is turned or
bowed upwardly somewhat away from the buckle
stem 9 so that the tail portion ll of the pad will
lie substantially parallel with the said stem. The
adjacent faces of both the stem 9 and pad l5 are
roughened or serrated crosswise as indicated at
l8. The slots Ill are obliquely cut and their rear
ends slope downwardly toward the stem 9 as
viewed in Figure 3 and hence forward movement
of the pressure pad l5 tends to lift it from the
stem while rearward movement moves it closer
to the stem. At all times however the spacing
at the frontal end of the pad is su?icient to pass
the strap E which may be readily passed through
the channel ll between the stem 9 and pressure
pad I5. Then when the end of the strap is
pulled back over the frontal end of the pressure
pad l5, which is rounded at this end as at l5a
for this purpose, the strap and the chains B will
be pulled tight around the tire F and wheel felloe
G and at the same time the oblique slots III will
cause the pressure pad to move toward the stem
9 and grip the strap between the roughened
Next comes into play a buckle tongue or clamp
I9 which is formed of heavy sheet material into a
bell-crank shape including the elongated lever or
handle 20 and short angularly turned cam or
clamp arm 2 I. The width of the clamp I9 is such
that it too will fit nicely between the. ears I6 and
at the junction of the lever 20 and cam 2I short
trunnions 20a are laterally extended and pivotally
mounted in thenaforesaid apertures I3 in the ears.
The cam 2! is thus so located that it turns toward
15 the pressure pad I5 and while, in the opened
position indicated in dotted lines in Figure 3, the
cam swings out of engagement with the pad, as
the lever 28 is then swung down to the position
shown in full lines the cam. 2I will press very
?rmly down on the pad I5 and will causethe
same to grip'ithe strap E‘ tightly. The apertures
I3 are so located in the ears ID relative to the
length of the cam 2I as to cause this clamping
action as the cam moves down against the pres
25 sure pad I5.
Adjacent their junction both the. lever 20 and
cam 2! have aligned slots 22 extended crosswise
and of such length as to accommodate the end‘ of
the strap E which is passed through them after
being pulled back over the frontal end of the
pressure pad I5 and of course after the clamp I8
is closed or moved to fastened position. The
through the channel I I over the rounded end I 5a
of the pressure pad I5 to “set” the pad against
the strap. The clamp J9 is then closed causing
the cam 2| to press the pad I5 against‘ the strap
affording a wide area of gripping-surface which
will securely grip the strap without cutting or
injuring it in any way. Then the strap end is
passed through the slots 22, beneath the ?ngers
I4 and ?nally through the slot 24 and the strap
thus positively prevents the clamp I9 from swing
ing open no matter what hard service it may en~
counter. In this connection the strap when
passed through the slots‘ 22 will prevent opening
movement of the clamp ‘since the strap to permit
such movement would have to pull through be 15
neath pressure pad which is obviously impossible.
Then the strap willstrilre the underside of the
?ngers I4 further preventing‘ said movement of
the clamp and to escape from the ?ngers it would
be necessary for the strap to pull free through the
slot 26 and slip from beneath the ?ngers which is
obviously very unlikely to happen. in service. It
will be evident therefore that the strap passing
through the slots 22 beneath the ?ngers it and
through the slot 24 constitutes a triple lock for 25
the clamp I9 and prevents accidental loosening
While I have herein'set forth a certain pre
ferred embodiment of my invention it is under
stood that I may vary from the same in minor . 30
structural details so as best to provide a practi
cal device for the purposes intended, not depart—
width of the channel II, pressure pad I5 and’ _ ing from the spirit of the invention and within the
clamp I9 are considerably greater than the width scope of the appended claim.
of the strapuE thus permitting the cutting of the
slots 22 without materially weakening the clamp
as will be understood. The space between the
?ngers Id however is less than the width of the
strap E and the clamp lever 20 is notched out on
40 each side as at 23 to clear these ?ngers id as the
lever swings down into the channel I I in fastened
turned up in spaced relation from the plate form—
ing a channel therebetween to accommodate a
strap, the said ears having slots adjacent one end
and apertures spaced therefrom, a pressure pad
pivotally mounted at one end in the slots and lying
position. The. strap E is then, after emerging
from the slots 22, passed beneath the ?ngers I4
and then ?nally through another slot 24 cut in
45 the lever’ 20 adjacent its end. This free end 25
in the channel, the adjacent faces of the pad and
plate being serrated crosswise, a buckle clamp of
hell crank shape pivoted in the said apertures and
'of the lever 20 is curved upward as shown in
pad, a lever on the buckle clamp, the said lever
and cam having aligned slots extended crosswise
to receive the strap, and catches turned inwardly
order to facilitate passing the strap through this
last slot 24.
Theuse and operation of the buckle will be
50 readily apparent from the foregoing, it being
understood that the strap E is ?rst pulled tightly.
A strap buckle including a buckle plate, ears
comprising a cam adapted to engage the pressure
from the said ears and terminating with a space
between less than the width of the strap.
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