An Improved Inflator for Pneumatic Tyres of Cycles and other purposes.
Year: 1892

page_text: Date of Application, 1st June, 1892
Complete Specification Left, 14th Feb., 1893-Accepted, 25th Mar., 1893
PROVISIONAL SPECIFICATION.
An Improved Inflator for Pneumatic Tyres of Cycles and other
purposes.
I, ALLAN DONALDSON, of 219 South Street, in the Town and County of Perth,
North Britain, Mechanic, do hereby declare the nature of this invention to be as
follows:-
This invention which relates to an improved inflator for pneumatic tyres of cycles
and other purposes; has for its object to construct an inflator which will take up no
more space than those at present in use and which owing to its construction gives
the user more purchase while working it..
In carrying out my said invention I employ a brass or other cylinder in which
works a suitable plunger or piston which is attached to the rod which is provided
at its other end with a hollow handle piece preferably of larger diameter than the
cylinder; the said cylinder is provided with an air inlet opening and also an outlet
opening to which the supply pipe is secured, or if desired the plunger rod may be
made hollow and the outlet opening made in the handle piece, in which case the
supply pipe would be secured to the handle piece in lieu of the cylinder.
Dated this 21st day of May 1900
JOHNSONS,
115, St. Vincent Street, Glasgow, Petitioner's Agents.
COMPLETE SPECIFICATION.
An Improved Inflator for Pneumatic Tyres of Cycles and other
purposes.
I, ALLAN DONALDSON of 219 South Street, in the Town and County of Perth,
North Britain, Mechanic, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to an improved inflator for pneumatic tyres of cycles and
other purposes, and has for its object to enable the inflator to be operated more
conveniently and with greater power without increasing its size or length.
Figure I is an elevation of an inflator constructed in accordance with my said
invention.
Figure 2 is a modification of the same, in section.
Referring to Figure 1 of the drawings, I construct, of brass or other material, a
cylinder A, within which works a cup leather plunger or piston C. The said
plunger or piston is attached to the front end of the actuating rod D the rear end
of which is provided with a hollow handle piece B capable of passing over the end
of the cylinder A. The said cylinder A is provided with an air inlet aperture at a
at its rear end and an air outlet nozzle at its front end, the said nozzle being
provided with a one way acting valve contained in the screwed portion a', to which
is attached the rubber tube a2 with screwed connection a³ for attachment to the
valve of the tyre.
By the said arrangement and construction of the hollow handle piece B a great
amount of purchase can be obtained for pumping, without sensibly or materially
increasing the size or length of the instrument.
As a modification shown in section Figure 2 I may mount the handle piece B¹
over the front end of the cylinder A¹.
In this case I make the plunger rod D' hollow and provide the one way acting

page_text: valve a within the cup leather plunger C¹; as being the air inlet aperture formed
in the front end of the cylinder.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is.
1. The general arrangement and construction of the inflator for pneumatic tyres
substantially as herein before described and shown in the accompanying drawings.
2. The arrangement and construction of the handle piece or portion of the inflator
substantially as and for the purpose hereinbefore described and shown in Figure 1
of the accompanying drawings.
3. The arrangement and construction of the handle piece or portion of the
inflator substantially as and for the purpose hereinbefore described and shown in
Figure 2 of the accompanying drawings.
Dated this 11th day of February 1802
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicant's Agents.