IMPROVEMENTS IN AND APPLICABLE TO VALVES FOR AIR COMPRESSORS
Year: 1882

page_text: LETTERS PATENT to William Teague of the parish of Illogan in the County
of Cornwall, Mining Engineer for an invention of "IMPROVEMENTS IN AND
PROVISIONAL SPECIFICATION left by the said William Teague at the Office
of the Commissioners of Patents on the 22nd March 1882.
**
WILLIAM TEAGUE of the parish of Illogan in the County of Cornwall
Mining Engineer IMPROVEMENTS IN AND APPLICABLE TO VALVES FOR AIR
COMPRESSORS."
This invention relates to improvements in and applicable to valves for air com-
pressors the object of the invention being to provide à valve which shall be simple
in its action and which shall have but little friction.
In carrying out my invention as applied to an inlet valve of an air compressor
I provide a lever one end of which moves on a fixed pivot on the end of the
compressor. The said lever is also pivotted to a slide having suitable ports and
which slide works behind inlet ports in the compressor. On a suitably placed
shaft operated by suitable gearing from the fly wheel shaft is fixed a cam on which
bears the outer end of the herein before described lever. By this arrangement
when the piston is receding the hereinbefore described cam raises the lever and
with it the slide thereby allowing the air to freely enter the cylinder of the com-
pressor and when the piston has reached the end of its stroke the cam has been
inoved free of the lever and the lever falls thereby shutting the valve which is
kept air tight by the pressure of the air.
A suitable spring is provided for adjusting the valve and keeping it in
position.
A valve of this construction operated in the manner hereinbefore described
allows of the piston of the air compressor working close to the end of the air
compressor cylinder thereby preventing waste of air.

page_text: on the
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Teague in the Great Seal Patent Office
22nd September 1882.
$
WILLIAM TEAGUE, of the parish of Illogan, in the county of Cornwall,
Mining Engineer IMPROVEMENTS IN AND APPLICABLE TO VALVES FOR AIR
COMPRESSORS "
This invention relates to improvements in and applicable to valves for air
compressors the object of the invention being to provide a valve which shall be
simple in its action and which shall have but little friction.
In carrying out my invention as applied to an inlet valve of an air compressor.
I provide a lever one end of which inoves on a fixed pivot on the end of the
compressor. The said lever is also pivotted to a slide having suitable ports and
which slide works behind inlet ports in the compressor. On a suitably placed
shaft operated by suitable gearing from the fly wheel shaft is fixed a cam on which
bears the outer end of the herein before described lever.
A suitable spring is provided for adjusting the valve and keeping it in
position.
A valve of this construction allows of the piston of the air compressor
working close to the end of the air compressor cylinder thereby preventing waste
of air.
In order to enable, my invention to be better understood I will proceed to
describe the same by reference to the accompanying drawing in which figure 1,
is an end view of an air compressor provided with a valve constructed according
to my improvements and figure 2 is a plan of the valve. Similar letters in both
the figures represent similar parts.
a, a, a, a, represent the inlets to the compressor; b, b, the ports in the slide or
valve f; c, c, is the lever one end of which moves on a fixed pivot c', on the end
of the compressor,, the said lever is also pivotted at c², to the slide f, which works
behind the inlet ports in the compressor; d, spiral spring for adjusting the valve;
g, shaft operated by suitable gearing such as mitre wheels from the fly wheel
shaft of the engine; ½, cam fixed on the shaft g, and on which cam bears the outer
end of the lever c.
By this arrangement, the parts being in the position shewn in the drawing, if
the piston recedes the shaft g, will be turned moving with it the cam h, thereby
raising the lever c, and with it the slide f, so as to bring the ports b, opposite the
inlets a, and allow the air to freely enter the cylinder of the compressor.
When the piston has reached the end of its stroke the cam h, moving with the
sbaft I, will have been turned free of the lever c, and the lever c, will fall and
thereby close the valve which will be kept air tight by the pressure of the air.
Having thus described my invention and the best means I am acquainted with
for carrying the same into effect I wish it to be understood that what I claim
is :-
Firstly. The combination of parts forming the improved valve for air compressors
arranged and operating substantially in the manner and for the purposes herein-
before described and represented in the accompanying drawing.
Secondly. The method herein described of working valves for air compressors

page_text: by the employment of a lever such as c, operated by a cam driven from the fly
wheel shaft of the engine substantially in the manner and for the purposes herein-
before described and represented in the accompanying drawing.
In Witness whereof I the said William Teague have hereto set my hand
and seal this twenty first day of September in the year of our Lord one
thousand eight hundred and eighty two.
Signed sealed and delivered by the
before named William Teague
in the presence of
GEO. J. BRAY
Sol.
Redruth.
WILLIAM TEAGUE J
(L.S.)