Year: 1885

page_text: I FRANK WALTER SCOTT of 44 Christian Street, Commercial Road East, in the
county of Middlesex Engineer do hereby declare the nature of this Invention to
be as follows:-
My invention relates more particularly to that class of air compressors where the
air is not required to be compressed beyond one stage, and my object is to more
readily and effectually cool the plunger and also to prevent the waste and splashing
of the water employed for the purpose, at the same time to prevent the cooling
water from entering the cylinder in which the air is compressed and to confine the
compressed air within such cylinder..
And my invention in the first place consists in causing the water surrounding
and employed for cooling the compressing plunger, to flow into the interior of the
said plunger during the process of compressing, thereby readily and effectually
cooling both the inside and outside of the same.
The method in which I effect this is as follows."
The gland in which the plunger works is lengthened upwards so as to extend
some distance beyond the plunger at the extreme point of its up stroke, and while
the apparatus is at work the water is caused to enter the space left for the purpose
between the upper portion of the said gland and the plunger, through a suitable
opening in one side of such gland, and when the top of the open plunger has passed
below the level of the surrounding water such water will enter and fill the interior
of the plunger. Another suitable opening in the opposite side of the gland is
provided for the exit of the cooling water, the cooling being accomplished in this
manner without splashing and consequent waste of water, owing to the lengthening
of the gland as above stated.
In order to prevent the water from entering the compressing cylinder a suitable
packing is provided in the stuffing box, such packing serving also to prevent the
compressed air from escaping from the cylinder.
W. SPENCE & SON,
Agents for the Applicant,

page_text: I FRANK WALTER SCOTT of 44 Christian Street, Commercial Road East, in the
County of Middlesex, Engineer, do hereby declare the nature of this inventiou
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
My invention relates more particularly to that class of air compressors where the
air is not required to be compressed beyond one stage, and my object is to more
readily and effectually cool the plunger and also to prevent the waste and splashing
of the water employed for the purpose, at the same time to prevent the cooling
water from entering the cylinder in which the air is compressed, and to confine the
compressed air within such cylinder.
And my invention in the first place consists in causing the water surrounding
and employed for cooling the compressing plunger, to flow into the interior of the
said plunger during the process of compressing, thereby readily and effectually
cooling both the inside and outside of the same.
The method in which I effect this is as follows:
The gland in which the plunger works is lengthened upwards so as to extend
some distance beyond the plunger at the extreme point of its up stroke, and while
the apparatus is at work the water is caused to enter the space left for the purpose
between the upper portion of the said gland and the plunger, through a suitable
opening in one side of such gland, and when the top of the open plunger has passed
below the level of the surrounding water such water will enter and fill the interior
of the plunger. Another suitable opening in the opposite side of the gland is
provided for the exit of the cooling water, the cooling being accomplished in this
manner without splashing and consequent waste of water, owing to the lengthening
of the gland as above stated.
In order to prevent the water from entering the compressing cylinder a suitable
packing is provided in the stuffing box, such packing serving also to prevent the
compressed air from escaping from the cylinder.
In order that my invention may be fully understood, I will describe it more
particularly by the aid of the accompanying drawing which is a vertical section of
an Air Compressor constructed in the manner above referred to.
DESCRIPTION OF THE DRAWING.
A is the cylinder of the compressor in which the plunger D works as it is driven
by a crank from above as shown or otherwise, C B shows the prolongation of the
gland which is extended a sufficient distance beyond the plunger at the extreme
point of its up stroke, E is an opening through which water is admitted into the
plunger D for the purpose of cooling, F is the outlet for the water, PP shows the
packing in the gland.
By means of the above arrangement the water on its admission at E will perform
its required office of cooling, and the prolongation of the gland C, B, will prevent
splashing and waste, and will also allow the water to come in contact with the

page_text: outside of the plunger as well as the inside of the same, thereby effectually cooling
it. The packing P, P, will prevent the water from passing into the cylinder A or
the air from escaping therefrom.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
In air compressors of the kind referred to the arrangement for applying cold
water to both the inside and outside of the compressing plunger during the process
of compression for the purpose of cooling the same by means of openings in the
prolongation of the gland, substantially as represented and described.
Dated this fourth day of February 1886.