Improvements relating to Pumps for Inflating Pneumatic Tyres and for like purposes.
Year: 1897

page_text: Date of Application, 11th June, 1897
Complete Specification Left, 11th Mar., 1898-Accepted, 23rd Apr., 1898
PROVISIONAL SPECIFICATION.
Improvements relating to Pumps for Inflating Pneumatic Tyres and
for like purposes.
66
'Tom
We, HARRY LUCAS. and AUGUSTINE CAMPBELL DAVISON, both of the
Bowling Lamp Works," Little King Street, in the City of Birmingham, Manu-
facturers, do hereby declare the nature of this invention to be as follows:-
This invention consists of improvements relating to pumps for inflating the
pneumatic tyres of cycle and other vehicle wheels and for like purposes, our object
being to construct a pump or inflator that can be readily supported on the ground
when in service and more conveniently connected to the tyre to be inflated, and
to provide simple and effective means whereby in inflators having handles of the
reversible type the plunger rod or tube shall be prevented from rotation when the
handle is screwed on to such tube or is unscrewed from the same.
In the application of our invention to the construction of a pump or inflator to
be operated by the foot we employ a cylinder or barrel formed from brass or other
metal tube, and provide the same with a cross-piece or other suitable base at its
lower and closed end for resting upon the ground. On the upper end of the barrel
we fit the ordinary perforated cap through which passes the tubular piston or
plunger rod. At the upper or outer end of the tubular plunger rod we attach a
step or plate to which we secure the leather or other stirrup. A suitable passage
is formed in the plate with a screwed nozzle or the like at the outer end for the
connection of the ordinary rubber tube.
When the inflator is placed with its base in position on the ground the rubber
tube can be very readily and conveniently connected for service, and by placing
one foot upon the inflator base and the other within the stirrup, the operator with-
out requiring to use his hands, can inflate the tyre to the required degree of
pressure.
In making an inflator to be operated by hand, we employ a base at the lower
end of the barrel for resting upon the ground as hereinbefore described, but in place
of the step or plate with the stirrup, at the upper end of the tubular rod, we attach
a suitably shaped hollow handle, having a screwed nozzle or the like at one side,
for the rubber connecting tube.
When either the hand or foot type of inflator, as hereinbefore described, are
in service, the flexible connecting tube owing to its attachment to the moving
step or handle instead of to the stationary barrel as in the ordinary manner, will
have little or no tendency to overthrow the inflator from its upright position.
To prevent rotation of the tubular plunger rod when the handle is screwed on to
such rod or is unscrewed from the same, we form a projection or groove on the under
side of the rod head to engage with a corresponding groove or projection on the
upper end of the barrel. Thus, when the rod is pushed to its innermost position
the groove and projection will engage with each other and the two parts will be

page_text: locked or keyed together in such a manner as to prevent rotation of the rod during
the screwing or unscrewing movement of the handle.
Dated this 10th day of June 1897.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
and 13, Temple Street, Birmingham,
Agents for the Applicant.
Improvements relating to Pumps for Inflating Pneumatic Tyres and
for like purposes.
We, HARRY LUCAS and AUGUSTINE CAMPBELL DAVISON, both of the "Tom
Bowling Lamp Works," Little King Street, in the City of Birmingham, Manu-
facturers, 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 consists of improvements relating to pumps for inflating the
pneumatic tyres of cycle and other vehicle wheels and for like purposes, our object
being to construct a pump or inflator that can be readily supported on the ground
when in service and more conveniently connected to the tyre to be inflated, and
to provide simple and effective means whereby in inflators having handles of the
reversible type the plunger rod or tube shall be prevented from rotation when the
handle is screwed on to such tube or is unscrewed from the same.
to:
In the accompanying sheet of explanatory drawings to be hereinafter referred
Figure 1 is a side elevation and Figure 2 an end elevation of a foot pump or
inflator constructed in accordance with our invention.
Figure 3 is a side elevation representing a portion of a hand pump or inflator
constructed in accordance with our invention.
Figure 4 illustrates the means whereby we prevent the rotation of a reversible
inflator handle when it is screwed on to the plunger rod or tube or unscrewed from
the same.
In the application of our invention to the construction of a pump or inflator to
be operated by the foot we employ a cylinder or barrel as A formed from brass
or other metal tube, and provide the same with a cross-piece or other suitable base
such as B at its lower and closed end for resting upon the ground. On the upper
end of the barrel we fit the ordinary perforated cap C through which passes the
tubular piston or plunger rod D. At the upper or outer end of the tubular plunger
rod we attach a step, plate, or disc as E to which we secure the leather or other
stirrup F. A suitable passage is formed in the plate with a screwed nozzle as G
or the like at the outer end for the connection of the ordinary rubber tube H.
When the inflator is placed with its base B in position on the ground the rubber
tube H can be very readily and conveniently connected for service, and by placing
one foot upon the inflator base and the other within the stirrup, the operator with-
out requiring to use his hands, can inflate the tyre to the required degree of
pressure.
In making an inflator to be operated by hand, we employ a base at the lower
end of the barrel for resting upon the ground as hereinbefore described, but in place
of the step or plate with the stirrup, at the upper end of the tubular rod, we attach
a suitably shaped hollow handle having a screwed nozzle or the like at one side,

page_text: for the rubber connecting tube; or we attach the connecting tube to the handle
stem as shown at Figure 3.
When either the hand or foot type of inflator, as hereinbefore described, are
in service, the flexible connecting tube owing to its attachment to the moving
step or handle instead of to the stationary barrel as in the ordinary manner, will
have little or no tendency to overthrow the inflator from its upright position.
To prevent rotation of the tubular plunger rod when the reversible handle J
(Figure 4) is screwed on to such rod or is unscrewed from the same, we form a
projection or a groove as K on the under side of the rod head to engage with a
corresponding groove or a projection as L on the upper end of the barrel. Thus,
when the rod is pushed to its innermost position the groove and projection will
engage with each other and the two parts will be locked or keyed together in such
a manner as to prevent rotation of the rod during the screwing or unscrewing
movement of the handle. As shown at Figure 4 the handle J is in its working
position, but when not in use it is unscrewed from the plunger rod and reversed;
the opposite and open end of the handle is then telescoped over the upper end of
the pump barrel.
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. A pump for the inflation of pneumatic tyres and for like purposes provided
with a base or ground support and having the flexible connecting tube attached
to the handle or other moving part, substantially as described.
2. The arrangement and combination of parts forming the improved foot pump
or inflator, substantially as and for the purposes described and as illustrated at
Figures 1 and 2 of the drawings.
3. The combination with the reciprocating tubular plunger rod of a pneumatic
pump or inflator, of a handle having attached thereto the flexible connecting tube,
substantially as described and as illustrated at Figure 3 of the drawings.
4. In a pneumatic pump or inflator having a handle of the reversible type, means
for preventing the rotation of the plunger rod or tube when the handle is screwed on
to it or is unscrewed from the same, substantially as described and as illustrated
at Figure 4 of the drawings.
Dated this 9th day of March 1898.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
and 13, Temple Street, Birmingham,
Agents for the Applicants.