A New and Useful Device for Inflating Pneumatic Tyres."
Year: 1897

page_text: Date of Application, 12th Jan., 1897-Accepted, 18th Dec., 1897
COMPLETE SPECIFICATION.
"A New and Useful Device for Inflating Pneumatic Tyres."
We, JAMES RIGGS., residing at 194 Terauley Street, in the City of Toronto,
in the County of York, in the Province of Ontario, clerk, and JOHN HENRY
BURCH,, residing at 112 Robert Street, in the said City of Toronto, contractor,
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 a device for inflating a pneumatic "tire during the
revolution of the wheel, and the object of the invention is to attach an air pump
to the valve of the tire, and operate the air pump during its revolution, in order
that all difficulties arising from puncture or other leakages may be overcome;
and the invention consists essentially of mounting an eccentric disk on the axle,
fitting an eccentric strap around the eccentric disk and connecting the eccentric
strap with the cylinder of the air pump permanently connecting the piston rod
of the air pump to the value of the tyre.
By the employment of a device of this kind a continuous current of air can
be injected into the tire during the revolution of the wheel and by this means
any inconvenience which might arise through the puncturing of the tire or other
leakage can be overcome.
In order to check the pressure of the air within the tire it is advisable to pro-
vide the tire with a safety valve capable of being set to blow off at any
predetermined pressure the whole device being hereinafter more fully set forth
and more particularly pointed out in the claims.
In the Drawings
Figure 1 is a side elevation of a pneumatic tired wheel shewing the hub partly
in 'section.
Like letters of reference refer to like parts throughout, the specification and
drawings.
A represents a pneumatic tire. B represents the ordinary valve of the tire.
C represents the hollow piston rod of the air pump one end of which is connected
to the valve B. D represents the piston connected to the opposite end of the
piston rod C and working within the cylinder of the air pump. E represents the
cylinder of the air pump. F represents a shank or connection for the cylinder E.
G represents an eccentric strap composed of two equal sections y g¹ the adjacent
meeting edges of which are bolted together by means of bolts. H represents an
eccentric disk fixed on the axle I; J represents the wheel hub. The motion of
the strap G is imparted to the cylinder E by means of the shank F and causes
the cylinder to pump a practically continuous current of air through. the hollow
piston rod C and valve B into the tire A during the revolution of the wheel.
To regulate the pressure of the air within the tire we find it advisable to pro-
vide the tire with a safety valve L capable of being set to blow off at any
predetermined pressure in order that when the pressure of the air reaches the
limit of safety, the safety valve L will permit of the escape of a portion of the air
from within the tire until the pressure has dropped below the limit of safety.

page_text: By providing a pneumatic tired wheel with a pump operated during the
revolution of the wheel the tire can be kept supplied with a continuous current of
air and if the tire is punctured the pressure of the inflation can be kept up by the
continued action of the air pump.
Having now particularly described and ascertained the nature of our said
invention we hereby declare that what we claim is
1 A device for inflating pneumatic tired wheels consisting of an air pump
permanently connected to the valve of the tire and operated during the revolution
or the wheel substantially as specified.
2 A device for inflating pneumatic tired wheels consisting of an air pump
comprised of a cylinder, a piston and a piston rod, the piston rod permanently
connected to the valve of the tire, an eccentric disk, an eccentric strap surrounding
the disk, and connected with the cylinder of the air pump substantially as
specified.
3 A device for inflating pneumatic tired wheels consisting of an air pump
comprised of a cylinder a piston and a piston rod permanently connected to the
valve of the tire, an eccentric disk, an eccentric strap surrounding the disk and
a shank connecting the eccentric strap with the cylinder of the air pump sub-
stantially as specified.
4 A device for inflating pneumatic tired wheels consisting of an air pump
comprised of a cylinder a piston and a piston rod the piston rod permanently
connected to the valve of the tire, an eccentric disk, an eccentric strap surrounding
the disk a shank connecting the eccentric strap with the cylinder of the air pump
and a safety valve for the tire substantially as specified.
5 The device for inflating pneumatic tired wheels herein before described and
illustrated in the accompanying drawings.
Datul this 11th day of Tanum 1907