Improved Construction or Arrangement of Air Pumping Apparatus for Pneumatic Tyre Inflation."
Year: 1896

page_text: Improved Construction or Arrangement of Air Pumping Apparatus
for Pneumatic Tyre Inflation."
I JOHN PROSSER of 6 Old Jewry, city of London, Engineer do hereby declare
the nature of this invention to be as follows:-
This invention relates to certain improved construction or arrangement of air
pumping apparatus for Pneumatic Tyre inflation.
For the purpose of my invention I affix a pump cylinder to the rim of a wheel
and by a rod working through a stuffing box and within the cylinder air can be
drawn in to charge the pneumatic tube during the running of the machine to
compensate for any escape of the air previously pumped in by the ordinary
inflator.
The rod before mentioned is within the pneumatic tube and has a kind of shoe
the face sweep of which coincides with the periphery of the tyre in order that
the pulsations are subject to the revolution of the wheel due to the weight of the
rider.
I do not propose to employ a spring for the return of the piston portion of the
rod but the cylinder may be surmounted by a head in which a spring may be
placed said head serving also as a guide for the straight up and down motion of
the rod.
The shoe may be balanced from the rod by a ball or hinge joint so that it can
come gently into play for pressure.
H. GARDNER,
Patent Agent, 166 Fleet Street, London
Agent for the said J. Prosser.
"Improved Construction or Arrangement of Air Pumping Apparatus
for Pneumatic Tyre Inflation."
I JOHN PROSSER of 6 Old Jewry, city of London. Engineer 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 certain improved construction or arrangement of air
pumping apparatus for Pneumatic Tyre inflation.
For the purpose of my invention and as I show in the annexed sheet of drawings
in sectional elevation I affix a pump cylinder A and piston B to the rim C of a

page_text: wheel and by a rod D working through a stuffing box E. and within the cylinder A
air can be drawn in to charge the pneumatic tube F during the running of the
machine to compensate for any escape of the air previously pumped in by the
ordinary inflator when fixed on the nozzle a.
The rod 1) before mentioned is within the pneumatic tube and has a .kind
of shoe G suspended from the pillar H the face sweep of which shoe coincides with
the periphery or tread of the tyre F¹ in order that its operation and the pumps
pulsations are, subject to the revolution of the wheel due to the weight of the
rider.
The shoe G may be balanced from the rod by a ball or hinge joint I so that
either end of the shoe G can come gently into play for pressure.
In fitting my apparatus for practical uses. I secure it to a patch J in such
manner that it can be pushed endwise on the slant into a hole in the pneumatic
tube F and the patch J can be solutioned around the hole to enclose the shoe the.
cylinder being screwed down in close contact by the nut K.
I am aware that self acting inflators for pneumatic tubes of cycles have been
employed previously to this my invention. I therefore make no claim in a broad
sense to such an apparatus.
Those that have been used have been provided with a button head to the plunger
rod and from the rough usage of Cycles on Roads and the heads striking obstacles
caused the rods to bend and so stopped the operation but by my shoe Gas repre-
sented it has an up and down or see-saw motion from the pillar consequently a
sudden impact to interfere with the rod D is impossible.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The combination and arrangement of parts constituting an apparatus for
automatic pumping of air into pneumatic tubes of wheels from a see-saw motion
of a shoe suspended from and held by a pillar, all as set forth and substantially
as shown on the annexed.drawings.
2. As part of an automatic actioned air inflating apparatus of pneumatic tubes
or tyres, the shoe G. fitted and operating as and in the manner described.
Dated this 29th day of September 1807
H. GARDNER,
Patent Agent, 166 Fleet Street. London,
Agent for the said J. Prosser..