Improvements in Securing Detachable Covers of Pneumatic Tyres to Wheel Rims.
Year: 1894

page_text: Date of Application, 15th May, 1894
Complete Specification Left, 15th Feb., 1895-Accepted, 11th May, 1895
PROVISIONAL SPECIFICATION.
Improvements in Securing Detachable Covers of Pneumatic Tyres to
Wheel Rims.
#]
I, ALEXANDER BLACK of 59 North Frederick Street in the City of Glasgow,
Tyre Manufacturer, do 'hereby declare the nature of this invention to be as
follows:-
1
This invention has for its object the securing of covers of pneumatic tyres to
wheel rims in a simple and efficient manner and so as to provide for readily
detaching them to obtain access to the air tube.
Under the invention each side of the tyre cover is attached to the rim by two or
more distinct and endless bands of wire each of which is of slightly greater
circumferential length than that of the outer edge of the rim so as to permit of the
cover being readily detached when the air tube is deflated. These wires are
carried in separate circumferential loops or cases in the edge of the tyre cover, so
situated that when the tyre is secured on the rim the wires are eccentrically placed
in relation one to the other or others and to the wheel rim, and, whilst one portion
of each wire lies in the channel formed around the rim and the other portion lies
along the edge and outside of the rim, the portions. of the several wires lying along
the channel are practically coterminous or one wire rests on one part of the circum-
ference of the channel and the adjoining wire. rests on another part of said
circumference.
i
Under a modification a single wire is used to secure each side of the tyre cover
to the rim the said wire being carried in two or more convolutions within a loop or
case in the edge of the cover so as to assume a position in which it forms twp
or more eccentrically situated rings. or bands around the rim when, the tyre ja
secured thereon.
1
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Or two or more wires may each be carried in like manner in two or more
convolutions around each edge of the tyre cover to secure it to the rim.
Dated this 12th day of May 1894.
" "j
Improvements in Securing Detachable, Covers of Pneumatic Tyres to
Wheel Rims.
+
I, ALEXANDER BLACK, of 62 Bothwell Circus, in the City of Glasgow, Tyre
Manufacturer, do hereby declare the rature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention has for, its object. the securing of covers of pneumatic tyres to
wheel rims in a simple and efficient manner and so as to provide for readily
detaching them to obtain access to the air tube..
1.
Under the invention each side of the tyre cover is attached to the rim by
a number of distinct and endless bands of wire each of which may be of slightly
LDAL 071

page_text: .
greater circumferential length than that of the outer edge of the rim or of such
length as to permit of the cover being readily detached when the air tube is deflated.
These wires are carried in separate circumferential loops or cases in the edge of
the tyre cover so situated that when the tyre is secured on the ritm the wires are
eccentrically placed in relation. one to the other or others and to the wheel rim, and
whilst one portion of each wire lies in the channel formed around the rim and the
other portion lies along the edge and outside of the rim, the portions of the several
wires Iying along the channel are practically coterminous, or one wire rests on one
part of the circumference of the channel and the adjoining wire rests on another
part of said circumference..
Under a modification a single wire is used to secure each side of the tyre cover
to the rim the said wire being carried in a number of convolutions within a loop or
case in the edge of the cover so as to assume a position in which it forms a number
of eccentrically situated rings or bands around the rim when the tyre is secured
thereon.
Or two or more wires may each be carried in like manner in two or more
convolutions around each edge of the tyre cover to secure it to the rim.
In the accompanying diagrams, which illustrate my invention, Figure 1 represents
by various forms of dotted lines three endless wires w¹, w, w³, which are disposed
eccentrically in relation to each other and are carried in loops or cases in the tyre cover
at each edge. Whilst thus eccentric to each other a complete circle is formed by the
coterminous or overlapping wires in diameter slightly greater than that of the
hollow of the rim; and a corresponding circle of diameter approximating to that
of the edge of the rim. Figure 2 is a similar view showing a single wire wound
in three convolutions w¹, to³, w³, which are eccentric to each other the wire being
carried in a loop or case around the tyre cover. Figure 3 is a view showing a wire
carried in like manner in four eccentric convolutions w¹, w, w, w, in a loop or case
around the edge of the tyre cover. Figure 4 shows two wires w, to', wound each
in two convolutions which are eccentric one to the other, the wires. being confined
in loops or cases in the tyre cover. Figure 5 is a perspective view of part of the
rim R tyre T, and cover C of a wheel showing the tyre deflated. On one side A
the wire or wires in the cases c in the edge of the cover are represented as in the
position they occupy for holding on the cover when the tyre is inflated. On the
other side B the cover C is drawn so that at one part the wires rest in the portion
of the rim of least diameter whilst at another line the edge of the cover C is drawn
up to clear the edge of the rim.
In my Provisional Specification I proposed to attach the tyre cover by means of
two or more 'eccentrically disposed bands of wire on each side. I now find
that whilst three or any greater number of wires disposed eccentrically or a single
wire wound in not less than three eccentric convolutions or two or more wires
wound in two or more convolutions may be advantageously used as described; two
eccentric wires at each side or two eccentric convolutions of a single wire at each
edge do not provide a continuous support for the cover around the rim but leave an
unsecured gap at the point of intersection of the wires. Under my invention as
above limited the tyre cover is supported around the whole of its perimeter by the
coterminous or overlapping wires of both the smaller and greater convolutions and
no part of the cover is left unsupported. Furthermore the wires are not necessarily
free to move within their cases in the cover but may be secured therein by
solutioning or they may be soldered at the points of intersection..
.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
意
1. As means for securing a detachable cover of a pneumatic tyre' to a wheel rim
three or more endless wires or bands disposed eccentrically in loops or cases formed
along each edge of the tyre cover substantially as described.
2. As means for securing a detachable cover of a pneumatic tyre to a wheel rim

page_text: a single endless wire wound in three or more eccentric convolutions in a loop or case
formed along each edge of the tyre cover substantially as described.
3. As means for securing a detachable cover of a pneumatic tyre to a wheel rim
two or more wires wound each in two or more eccentric convolutions in loops or
cases formed along each edge of the tyre cover substantially as described.
Dated this 14th day of February 1895.
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62, St. Vincent Street, Glasgow, Agent for the Applicant.