Improvements in the Construction and Means for Attachment or Detachment of Cycle Tires with regard to the Wheel Rims.
Year: 1893

page_text: Date of Application, 1st Nov., 1893
Complete Specification Left, 1st Aug., 1894-Accepted, 1st Sept., 1894.
PROVISIONAL SPECIFICATION.
Improvements in the Construction and Means for Attachment or
Detachment of Cycle Tires with regard to the Wheel Rims.
We, CHARLES DAVIES, Gold-beater of 131 Westgate Road, and JOHN DAVIES,
Watchmaker of 13 Campbell Street both in the City and County of Newcastle-on-
Tyne do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the construction and means for
attachment or detachment of cycle tires with regard to the wheel rims whereby
greater resiliency of action and increased confort and speed may be obtained.
To effect our object we propose to extent the outer covering or tire of canvas
and rubber or like material on both sides after these parts have been brought
round the air chamber so as nearly to meet each other at the rim and in the
extensions so formed we propose to fit or envelope in rubber and canvas or like
material on each side of the tire light steel bands or hoops which are intended to
lie against the more or less flat-sectioned rim the edges of which will be raised to
prevent any lateral motion of the bands or tire.
After the bands have been placed round the rim on either side of the tire we
propose to secure and join them together by drawing or extending them by means
of oval or equivalent shaped bolts designed to turn or work in slotted or shaped
boles of special formatiou in the bands so that the turning of the bolts shaped as
foreshadowed through a portion of a revolution shall force the bands tightly against
the rim and in this position the bolts can be secured by a nut or nuts or catch
screwed or abutted against the underside of the rim.
When in use the compression of the tire will cause it to subside more or less
against the enveloped bands and these contact surfaces may be smooth or more or
less roughened if so desired to increase the frictional grip between these parts on
either side of the tire.
Dated this 31st'day of October 1893.
A. CRAWHALL CHAPMAN,
Newcastle-on-Tyne, Patent Agent.
COMPLETE SPECIFICATION.
Improvements in the Construction and Means for Attachment or
Detachment of Cycle Tires with regard to the Wheel Rims.
.
We, CHARLES DAVIES, Gold-beater of 131 Westgate Road and JOHN DAVIES
Watchmaker of 13 Campbell Street both in the City and County of Newcastle-on-
Tyne, do hereby declare the nature 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 relates to improvements in the construction and means for
attachment or detachment of cycle tires with regard to the wheel rims whereby
greater resiliency of action and increased comfort and speed may be obtained.
In carrying out our invention we propose to use steel or other metal bands or
hoops for securing the tires on the rims and in order to effect this purpose we
use a special form of tire and special modes of jointing the bands as hereinafter
explained.

page_text: We will now proceed to fully explain our invention with reference to the
accompanying drawings in which
Figures 1 and 14 show sections of tires in position on rims ;
Figure 2 shows in side sectional elevation a mode of locking or unlocking the
bands Figures 3 and 4 showing in plan the same dovice unlocked and locked
respectively.
Figure 5 shows in side sectional elevation a modified device for locking and
unlocking the bands on the rim and in the following description like marks of
reference designate like parts.
Referring to the drawings it will be observed that the undersides of the tire
proper A (see Fig. 1) are shown extended so as to envelope the flat steel bands A¹
in the manner shown, A being the usual inflation tube and A³ the, rim and in
Figure 1 a similar device is shown as applied with a single instead of a double
band, the band A¹ in this case being shown curved to suit the rim.
Such bands enable a tire to be easily removed from the rim at any time as
cementing or solutioning can be dispensed with but if deemed desirable one of the
sides of the tire shown in Figure 1 might be cemented or otherwise more
permanently secured to the rim leaving the opposite side containing the band as a'
means of access to the interior of the tire.
An important feature in connection with the use of bands for securing tires to
rims is the mode of tightening the bands on the rim for it will be seen that the
bands must be of a diameter large enough to slip over the rim and then when in.
position on the rim they must be securely tightened up. Figures 2, 3 and 4 show
one device and Figure 5 a modification for effecting this purpose satisfactorily.
In Figures 2, 3 and 4 an oval-shaped bolt B is shown working in a semi-oval
shaped hole H in each of the band-ends to be tightened up. Figure 3 shows the
bands ending at E E and E' E' in the slack position in which they are after' first
being slipped onto the rim and the oval-necked bolt B is also in the unlocked
position. By turning the square head S of this bolt its ovally-shaped neck N
presses against the flat end of each semi-oval' hole in the bands and forces the bands
toward each other and so locks them securely on the rim as shown in Figures 2
and 4. The unlocking is of course effected by the reverse operation.
In Figure 5 the ovally-shaped bolt is formed with taper shoulders as shown
arranged to work in slotted or elongated holes in the band ends so that the tightening
of the nut on the bolt draws the taper-shoulders into the slots to force the band
ends together as above described and as shown in Figure 5. The slackening of the
nut.of course again slackens the bands for removal or otherwise as desired.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
The improvements in. the construction of cycle tires consisting in the combination
with the tires of steel or other metal bands enveloped therein and adapted to be
looked or unlocked on the rim substantially as and for the purposes herein set,
forth.
Dated this 2104 JT1 1004
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.