IMPROVEMENTS IN PISTON ROD STUFFING BOXES FOR GAS MOTOR ENGINES to be as follows:
Year: 1884

page_text: I SAMUEL GRIFFIN of Kingston Iron Works Bath in the County of Somerset
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
PISTON ROD STUFFING BOXES FOR GAS MOTOR ENGINES to be as follows:-
"
My invention relates to improvements in the arrangement and construction of
gas inotor engines of the character described in the specification of Letters Patent
granted to me dated 23rd August 1883 N° 4080 and also to other gas motor
engines in which a piston rod is used.
According to my improvements I arrange a tube or sleeve through which the
piston rod passes this sleeve being surrounded by a water jacket through which
water is caused to circulate in connection with a water jacket on the outside of the
cylinder or otherwise.
In engines which have a compression space this tube and water jacket may be
conveniently extended from the bottom of the stuffing box on the cover or end of
the cylinder through the compression space as far as the piston, when its travel in
the direction of the stuffing box is completed. The tube or sleeve and water jacket
may be made of such a length as to prevent any part of the piston rod which
comes into contact with the flame in the interior of the cylinder coming into contact
with the packing in the stuffing box.
In engines which have no compression space this sleeve and water jacket may be
extended from the outside of the cover or end of the cylinder and terminate in a
stuffing box. The object of this long sleeve and water jacket is two-fold.
Firstly in consequence of its great length the escape of pressure round the
piston rod is almost entirely prevented so that an exceedingly light packing in the
stuffing box is sufficient to prevent all escape.
"
Secondly it protects the piston rod from the direct action of the flame during
the explosions.
A water jacket can also be advantageously fitted round the sleeve through
which the water can circulate in connection with the water round the outside of
the cylinder or otherwise. The piston rod is thus kept at a comparatively low
temperature.
The length of the sleeve may be advantageously such that no part of the piston
rod which passes into the interior of the cylinder into contact with the flame comes
in contact with the packing in the stuffing box. The satisfactory working of the
piston rod is thus secured without overheating.

page_text: T. SAMUEL GRIFFIN of Kingston Iron Works Bath in the County of Somerset
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
PISTON ROD STUFFING BOXES FOR GAS MOTOR ENGINES" 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 to improvements in piston rod stuffing boxes for gas motor
engines of the character described in the specification of Letters Patent granted to
me dated 23rd August 1883 N° 4080 and also to other gas motor engines in which
a piston rod is used.
According to my improvements I arrange a tube or sleeve through which the
piston rod passes this sleeve being surrounded by a water jacket through which
water is caused to circulate in connection with a water jacket on the outside of the
cylinder or otherwise.
In engines which have a compression space this tube and water jacket may be
conveniently extended from the bottom of the stuffing box on the cover or end of
the cylinder through the compression space as far as the piston when its travel in
the direction of the stuffing box is completed. The tube or sleeve and water
jacket may be made of such a length as to prevent any part of the piston rod
which comes into contact with the flame in the interior of the cylinder coming
into contact with the packing in the stuffing box.
In engines which have no compression space this sleeve and water jacket may be
extended from the outside of the cover or end of the cylinder and terminate in a
stuffing box. The object of this long sleeve and water jacket is two-fold.
Firstly in consequence of its great length the escape of pressure round the
piston rod is almost entirely prevented so that an exceedingly light packing in the
stuffing box is sufficient to prevent all escape.
Secondly it protects the piston rod from the direct action of the flame during
the explosions when carried through the compression space.
And in order that my invention may be clearly understood and readily carried
into practice I will proceed to describe the drawings hereto annexed.
"

page_text: pipes (not shown in the drawings) in any convenient manner. In connection with
this water space there are two passages h h which also communicate with the
annular water space f round the piston rod, these passages being so arranged that
a continuous circulation of water is freely maintained in the before mentioned
annular water space fround the piston rod simultaneously with that in the annular
water space g round the cylinder c and compression spaces o¹ c¹ the circulation
being consequent on the heat developed in the cylinder. The piston rod is thus
kept at a temperature about that of the water which surrounds it.
I do not limit myself to the precise details berein described nor to any
particular length of sleeve. Nor do I claim the general principle of water
circulation for the purpose of keeping the parts of gas motor engines cool such
principle being well known and in common use.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:-
First. The arrangement and application of a tube or sleeve d through which
passes the piston rod of a gas motor engine in which a combustible compound is
used, such sleeve preventing the direct action of the heat and flame on the piston
rod substantially as described with reference to Figures 2 and 3 of the Drawings
hereto annexed.
Second. The arrangement and application of an annular water space round the
aleeve or piston rod of a gas motor engine through which water can circulate
substantially as and for the purpose herein before described and represented in
Figures 1 and 3 of the Drawings annexed.
Third. The arrangement and application of ports or passages, such as h. h. for
the purpose of establishing communication and consequent circulation between the
water space g round the cylinder and the water space f round the sleeve or piston
rod, substantially as and for the purpose herein before described and illustrated by
figures 1 and 3 of the drawings hereto annexed the water space g being connected
with a supply of water in any convenient manner.
Dated this 21st day of November 1884