Improvements relating to Pneumatic Tires.
Year: 1893

page_text: Date of Application, 12th June, 1893-Accepted, 22nd July, 1893
COMPLETE SPECIFICATION.
Improvements relating to Pneumatic Tires.
I, DANIEL HERBERT SMITH, of 217 Walnut Street in the City of Holyoke,
County of Hampden and State of Massachusetts, United States of America,
Dentist, 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 wheels for bicycles and other vehicles
having pneumatic tires which comprise a rim, a removable air-tube and an outer
covering or shoe for the air-tube which may be so disconnected from the rim as to
permit the removal of the air-tube for repair or replacement.
This invention particularly pertains to the formation of an outer tire-covering or
shoe having a beaded edge, and the invention consists in a shoe or outer cover for
a pneumatic tire having an edge thereof of bead form and constituted by a suitably
attached length of spirally wound wire.
In the drawings,
Figures 1 and 2 are sectional and perspective views showing the outer tire covers
or shoes embodying this invention.
Figures 3 and 4 are views showing the shoe as applied relative to the rims and
air-tubes of bicycle wheels.
In the drawings, A represents a rim for the wheel which may be one of many
cross-sectional forms, the invention in no wise pertaining to the rim itself.
B represents the air-tube of the tire and C the outer covering or shoe which is
flexible and usually embodies, at the tread, a thickness, a, of rubber in any of its
suitable elastic compounds, the same being moulded upon, or otherwise attached to,
a strip of canvas or fabric, 62, which, with the said thickness of rubber, is made
into the form of an endless band.
The shoe has its edges provided with a flexible, thickened portion, or bead, and
this is preferably constituted in the manner seen in Figures 1 and 2, by forming
the marginal portions of the shoe tubular, as seen at b, and enclosing a spiral
spring, d, within each of the said marginal tubes; and in utilizing this shoe for
clincher tires of other descriptions than the present one it is desirable to have, in
some cases, a somewhat thick or plump bead, and, in other cases, a bead as wide or
wider, but of less thickness. In the former case the spiral spring may be left
round, as wound, and as seen in Figure 1, or the spring may be collapsed, that is,
it may have its coils flattened down, as indicated in Figure 2.
I may employ my shoe having the beaded edge or edges constituted by convolu-
tions of wire with various forms of rims, two examples of which are indicated in
Figures 3 and 4.
In Figure 3 the beaded edges of the shoe are carried within the concavity of the
rim and are overlaid by a thin hoop, y, the air-tube having its base resting upon
the hoop and its lateral and tread sides surrounded by the shoe.
In Figure 4 the rim has the external underturned lip, f, with a trough or groove
along the external surface thereof towards each side into which groove the
flattened beaded edge of the shoe is placed, being overlaid by the externally applied
and removable hoop, y², of metal or other suitable, thin material.
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 :-
1. In a tire, the combination with a rim, of an air-tube, and a shoe which has
one or both of its edges formed tubular and enclosing a spiral spring, the beaded-
ados enescing a suitable in thorafor which is neatided on the rim

page_text: 2. A shoe for a pneumatic tire having a flexible and beaded edge thereof
constituted by a spiral spring, the convolutions of which are flattened or collapsed,
substantially as described.
3. A shoe for a pneumatic tire having a flexible and beaded edge constituted by
a spirally wound and suitably attached wire, substantially as described.
Dated this 10th day of Anril 1893
DANIEL HERBERT SMITH.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.