Valve for Pneumatic Tubes and like Devices.
Year: 1897

page_text: Date of Application, 15th Nov., 1897-Accepted, 23rd July, 1898
COMPLETE SPECIFICATION.
Valve for Pneumatic Tubes and like Devices.
I, JOHN CLINTON MACSPADDEN, of 423, Francis Street, St. Joseph, State of
Missouri, in the United States of America, Manufacturer, 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 valves for pneumatic or air-inflated tires and other
inflatable devices, such as foot-balls, punching-bags, and the like; and it has for
its general object to provide a simple and effective non-return or check valve,
which is more especially designed as a repair valve" that is to say, is designed
to be quickly and easily connected to the outside of and used in conjunction with
air-tubes at present in use when it is necessary to equip the same with a new
valve.
The invention also contemplates the application of the improved valve to the
air-tubes at the time of manufacture, since the cheapness of and the ease and
facility with which the valves may be applied will very materially lessen the cost
of the completed air tube.
The invention will be fully understood from the following description and
claims when taken in conjunction with the accompanying drawings, in which,
bicycle-tire equipped with my
Fig. 1 is a transverse section of the air-tube of
improved valve.
Fig. 2 is a section taken in the plane indicated by the line of Fig. 1 with a
portion of the air-tube cut away to better illustrate the valve and the base of the
inflation-tube.
Fig. 3 is a detail transverse section illustrating an air tube embodying a
modification.
Fig. 4 is a section similar to Fig. 2, taken through the modified tube.
Fig. 5 is a detail section taken in the plane indicated by linear of Fig. 4.
Figs. and 7 are detail sections illustrating another modification, and
Fig. 8 is a detail section of still another modification.
Referring by letter to said drawings, and more particularly to Figs. 1 and 2
thereof, A indicates the felly of a bicycle-wheel.
B indicates the air-tube of the tire, which may or may not be inclosed in a
cover, as desired, and C indicates the unobstructed air-inflation tube, which is
preferably equipped with a cap a, screwed thereon, to prevent the entry of dust
to the valve and valve-seat presently described. This inflation-tube Č has an
outer casing a¹ of metal having interior threads and an inner portion b of rubber
and cloth, provided with exterior threads engaging the threads of the casing a¹,
and this portion 6 merges at its inner end into a base c, which is designed and
adapted to be connected to the outside of the air-tube by rubber cement or other
suitable means, as will be presently described, and is preferably provided on its
inner side with the piece of rubber f, which surrounds the aperture g in said base
and is designed and adapted to serve as a valve-seat, as illustrated in Figs. 1 and 2
of the drawings.
D indicates the non-return or check valve. This valve D may be formed of

page_text: silk, rubber, or any fabric or other material that will resist the passage of air;
but I prefer to form it of a thin piece of rubber, which, on account of its resiliency,
is superior to any other material, as will be appreciated. The said valve D prefer-
ably comprises a circular body h, which is designed to rest over the aperture g
in the base of the inflation-tube C, and the diametrically opposite arms i, which
are connected to the inner side of the inflation-tube base C by rubber cement or
the like, as illustrated in Figs. 1 and 2.
Prior to the connection of the base of the inflation-tube C to the outer side of the
air or inflatable tube B the said tube B is provided with two slits E, as shown.
The said base c of the inflation-tube C is then arranged upon the outside of the
tube B and so that the valve D rests over the slits E in said tube B. The portion e
of the inflation-tube base, c, which may be connected to the outer side of said base
by rubber cement, as shown, or may be formed integral with the same is then
connected by rubber cement or other suitable means to the outer side of the air-
tube B in an air-tight manner, and when the cement has set the valve is ready to
be used to inflate the tube A.
In inflating the tube B an air compressing and inflating device is connected in
the ordinary manner to the tube C, and when it is actuated the air will be forced
through the tube and pressing the valve D away from its seat will enter the space
between the portion 6 of the inflation-tube base c and the outer side of the tube B,
and will then pass between the valve D and the outer side of the tube B to and
through the slits E into the interior of the tube B. When the air seeks to escape
from the tube B, it will as will be readily observed, exert a pressure against the
inner side of the valve D and will press and hold said valve securely against its
seat and will thereby effectively prevent its escape through the tube Č.
In practice my improvements will be prepared ready to be attached to a tire-
tube, and consequently when a tube is to be equipped with a new valve all that
is necessary is to slit the tube, as indicated by E, and then connect the base of the
inflation tube c in the manner described, when the valve will be ready for use.
This, as will be observed, may be very quickly and easily done and at small cost, and
when the valve has been properly connected it will serve efficiently as long as the
air-tube itself remains good, and will not be liable to be casually disconnected
from the tube B.
In Fig. 3 of the drawings I have illustrated a modification in which the base c¹
of the inflation-tube C is formed in one piece and integral with the rubber
inflation-tube portion, and the tube 13 is provided with a circular opening E' in
lieu of the slits E before described. Otherwise, this construction is the same as
that before described, the base c¹ being connected to the outer side of tube B¹
and the valve D being connected to the inner side of said base c¹. This con-
struction also operates in the same manner as that shown in Figs. 1 and 2, the air
from the inflating device passing through the tube C and pushing the valve from
its seat and then passing into the tube B and being checked against escaping
from said tube El by reason of the pressure which it exerts against the inner side
of the valve, which holds it securely against its seat.
In Figs. 4 and 5 is shown a modification in which grooves t, are provided in the
inner side of the inflation tube base c to receive the arms i of valve D), so as to
enable said arms to rest flush with the inner side of the base. Otherwise this
construction is the same and operates in the same manner as that shown in
Fig. 3.
In Figs. 6 and 7 of the drawings I have illustrated a construction in which a
portion of the inflatable tube B2 is made to serve as a check or non-return valve
to prevent the escape of compressed air from the tube. This is done by slitting
the tube B2, as indicated by E2, and thus forming the valve D¹. In conjunction
with the tube B, I employ an inflation-tube C', having a base c which is connected
to the outer side of the tube B and is arranged so that the air-induction opening of
the tube C¹ will rest over the center of the valve or valve portion D'. In using this
construction when the air is forced by the inflating device through the tube ¹ the

page_text: valve D¹ will be forced and held from its seat, and in consequence the air will pass
to and through the slits E3 into the interior of the tube B. When the inflating
device is removed from the tube C, it will be seen that the air within the tube B2
will exert a pressure against the inner side of the valve I) and will hold it securely
against its seat and thereby effectually prevent the escape of air.
In Fig. 8 is shown a construction which is similar in all respects to that shown
in Figs. 1 and 2, with the exception that a series of apertures Es are employed in
lieu of the slits E2.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1° As an improved article of manufacture, a repair-valve comprising an inflation
tube having an inner portion 6, of rubber provided with exterior threads, and an
outer casing a, of metal, receiving the portion b, and having interior threads
engaging the threads of the portion b, the base c, formed integral with the rubber
portion 6, and adapted to be connected by rubber cement or the like to the outside
of an inflatable device with or without a check-valve of thin rubber or similar
material connected to the inner side of the base, and a cap connected by threads to
the metallic portion of the inflation-tube, substantially as specified.
20 The combination of the inflatable tube or other inflatable device having an
opening, an inflation-tube having the base arranged on the outer side of the
inflatable tube over the opening therein and secured to said outer side of the tube
by rubber cement or the like, and with the check or non-return valve of thin rubber
or similar material secured to the inner side of the base of the inflation-tube and
interposed between said base and the inflatable device and adapted to open to
permit air to pass from the inflation-tube to the interior of the inflatable tube and
also adapted to check the escape of such air from the inflatable tube substantially
as specified.
30 The combination of the inflatable tube or other inflatable device having an
opening, a repair-valve comprising an inflation-tube having the base connected
by rubber cement or the like to the outer side of the inflatable device, and with the
flat check or non-return valve of sheet rubber or other suitable material connected
to the inner side of the inflation-tube base and adapted to check the escape of air
through said tube, substantially as specified.
Dated this 13th day of November 1897.
L. DUYINAUD,
Agent for Applicant.