Automatic Pumping Attachments for Pneumatic Tyres.
Year: 1897

page_text: Date of Application, 23rd Dec., 1897-Accepted, 7th May, 1898
COMPLETE SPECIFICATION.
Automatic Pumping Attachments for Pneumatic Tyres.
We, JAMES HARRY KEIGHLY MCCOLLUM, Electrician, of 1001, Bathurst Street,
REMIGIUS ELMSLEY, Esquire, of 35, Adelaide Street, East, and WILLIAM HENRY
BROUSE, Barrister, of Corner Wellington and Church Streets, all of the City of
Toronto, in the County of York, in the Province of Ontario, Canada, 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:-
Our invention relates to improvements in automatic pumping attachments for
pneumatic tyres for bicycles and other vehicle wheels and the object of the invention
is to design a simple form of automatic pump, which may be readily attached to the
wheel of the bicycle to automatically pump the tyre and thereby dispense with the
ordinary cylinder pump at present in use and it consists essentially of a ring
suitably secured on the wheel concentrically to the hub and provided on its
periphery with a compressible tube and a roller suitably journalled on an arm
connected to the forks, the air tube secured on the flat ring being connected by a
suitable valve to a tube, which extends through the rim and is connected to the
interior air tube of the tyre as hereinafter more particularly explained.
Fig. 1, is a perspective view of a portion of a wheel of a bicycle showing our
improved attachment.
Fig. 2, is an enlarged detail of the main portion of the attachment.
In the drawings like letters of reference indicate corresponding parts in each
figure.
A is one of the members of the forks of the bicycle no matter whether the rear or
front fork, the other member being not shown. B is the axle. C is an arm located
on the axle outside of the ordinary hub. c is a washer and D is a nut secured on
the threaded outer end of the axle and holding the arm C in position.
E is the spindle secured in the outer end of the arm by the nuts e. E¹ is a spiral
spring encircling the spindle E and hooked at one end to the arm C and at the other
end over the double arm F being designed to cause a downward pressure upon the
roller f. f is a set screw extending through the sleeve f2. The double arm F has an
extension F, which is designed to be brought down underneath the spring hook C¹
secured to the arm C near the top thereof. I is a ring located concentrically to
the axle and provided with inwardly extending arms I secured by bolts and
nuts and to the spokes inside the points where they cross near the flange ; of
the hub J.
K is a band of rubber provided with a central passage-way k and preferably a
tube k¹. This band may be incorporated with canvas and the tube may be provided
or not as may be desired. The edges of the band are secured preferably by wire
stitching to the periphery of the flat ring I or it may be secured in any other
suitable manner probably preferably by making the ring wide enough, so that its
edges may be spun up on the edges of the band, so as to securely hold it in position.
It will be noticed that the ends of the band K are separated.

page_text: M is the
At the point of separation we preferably provide a cam projection L.
cylindrical casing of the preferred form of valve. M' is the inner casing provided
with a central passage-way m' and a rubber tube m having flat abutting sides m³.
The round portion of the tube m is secured in position around the stem m' of the
inner casing. m³ is the cap and m6 is a screw spindle provided with enlarged
disc-shaped ends m² and m8. The end of the tube extends to a nipple 2 connected
to a collar 3 inside the cap but communicates with the central passage-way of the
valve by means of the notches 4 made in the outer end of the casing M¹.
The cap
is screwed into position in the inner casing M' and the inner casing is screwed into
position in the outer casing. 4 is a hollow nipple on the opposite end of the inner
casing and 5 is a tube connecting the hollow nipple to the bent tube 51 extending
through the rim 6 of the wheel. The usual mushroom 7. is provided. The tube 51
connects with the interior of the air tube.
The operation of my invention is as follows. As the wheel rotates in the direc-
tion indicated by the arrow the roller presses upon the band K and consequently
the air tube k and completely closing same as the wheel rotates, thereby causes the
air to travel along to the opposite end of the air tube where it passes down through
the tube ¹ into the notches of the valve, and then through the flat tube of the
valve and down through the tube 5 into the air tube. This continuous pumping
occurs as the wheel rotates, the cam projection L serving to relieve the end of the
tube from being worn.
This cam projection also serves by its. rotation to regulate the amount of pressure,
which can be pumped through the tube. By extending it farther along the side
of the band the pressure of course will be decreased. Consequently it will. be
readily understood that any desired pressure may be maintained in the air tube of
the tyre.
Should it be desired to not pump into the air tube the double arm may be thrown
so that the extension F¹ will spring underneath the hook C¹, and thereby relieve
the roller from contact with the air tube on the ring. The tube which we use
connecting the valve to the air tube of the tyre is a rubber tube but of course it
will be understood that we might make a suitable connection to a spoke, which
would be made hollow and extend into the air tube of the tyre.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what we
claim is :-
1. An automatic pumping attachment for bicycles comprising a ring secured
to the wheel concentric to the axle a tube secured on the periphery of the ring, a
roller suitably supported and designed to press upon the tube as the wheel rotates,
an extension tube extending from the end of the tube on the ring to the air tube
of the tyre of the wheel and a suitable valve interposed between the pump and the
air tube of the tyre as and for the purpose specified.
2. An automatic pumping attachment for bicycles comprising a ring secured to
the wheel concentric to the axle, a tube secured on the periphery of the ring, a
roller suitably supported and designed to press upon the tube as the wheel rotates,
an extension tube extending from the end of the tube on the ring to the air tube of
the tyre of the wheel and a suitable valve interposed between the pump and the
air tube of the tyre and a cam projection secured to the ring and bridging the space
between the opened and closed ends of the air tube on the ring as and for the
purpose specified.
3. An automatic pumping attachment for bicycles comprising a ring secured to
the wheel concentric to the axle, a tube secured on the periphery of the ring, a
spring-pressed arm suitably supported on the frame, a roller pivotally held in the
end and designed to press upon the tube as the wheel rotates, an extension tube
extending from the end of the tube on the ring to the air tube of the tyre of the
wheel and a suitable valve interposed between the pump and the air tube of the tyre
as and for the purpose specified.

page_text: 4. An automatic pumping attachment for bicycles comprising a ring secured to
the wheel concentric to the axle, a tube secured on the periphery of the ring, a
spring-pressed arm, a spindle extending through one end of the same, an arm
secured in the end of the axle in the end of which such spindle is held and a roller
pivotally held in the end and designed to press upon the tube as the wheel rotates,
an extension tube extending from the end of the tube on the ring to the air tube
of the tyre of the wheel and a suitable valve interposed between the pump and the
air tube of the tyre as and for the purpose specified.
5. In an automatic pumping attachment for bicycles in combination the con-
centric ring, the arms secured to the same and to the wheel in proximity to the
hub, the compressible tube on the periphery of the ring, the arm extending from
the axle and secured to same, the spindle held in the end of the arm, the double
arm pivotally held in the end of the spindle, and the roller in the end of the double
arm and the spiral spring encircling the spindle and hooked at one end on the arm
attached to the axle and hooked at the other end to the double arm, so as to main-
tain a downward pressure upon the roller as and for the purpose specified.
6. In an automatic pumping attachment for bicycles in combination the con-
centric ring, the arms secured to the same and to the wheel in proximity to the hub,
the compressible tube on the periphery of the ring, the arm extending from the
axle and secured to same, the spindle held in the end of the arm, the double arm
pivotally held in the end of the spindle and the roller in the end of the double
arm and the spiral spring encircling the spindle and hooked at one end on the arm
attached to the axle and hooked at the other end to the double arm, so as to main-
tain a downward pressure upon the roller, the extension on the double arm and
the co-acting spring hook catch secured to the end of the arm attached to the axle
as and for the purpose specified.
7. In combination, the concentric ring, the tube held to the periphery of the
same, the roller and suitable pressure means for maintaining it to press upon the
tube on the ring, the valve comprising the inner and outer casing with rubber end
having flat abutting sides, the central passage-way, the cap and notched casing and
screw pin extending through the cap and the tube extending into the collar inside
the cap and the tube extending from the opposite end of the valve to the air tube
of the tyre as and for the purpose specified.
1007
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.