An Improvement or Improvements in Gas Engines.
Year: 1893

page_text: Date of Application, 31at Jan., 1893
Complete Specification Left. 12th Oct.. 1893-Accepted. 18th Nov.. 1893
PROVISIONAL SPECIFICATION.
An Improvement or Improvements in Gas Engines.
I CHARLES WOLRYCHE DIXON of No. 09 Harborne Road, Birmingham in the
County of Warwick, Mechanical Engineor do horeby declare the nature of this
invention to be as follows:-
My invention has reference to gas engines of the kind in which the series of
actions commonly known as the "Otto cycle" occur, and has for its object to
prevent the jarring or "pounding" as it is tochnically called which occurs ospecially
when the said engings work at high speeds. The said pounding is produced by the
nearly alternato striking of the opposite sides of the bearings of the cross head piu,
crank pin and crank shaft upon the said parts, and my said invention has for its
object to prevent wholly or in great part the said pounding by the arrangement or
combination of parts hereinafter described.
In addition to the ordinary oylinder I employ a second or supplementary cylinder
in "tandem" that is, in line with the ordinary cylinder. The said second cylinder
has a piston fixed to the prolongation of the piston rod of the ordinary cylinder the
said piston rod passing through a stuffing box at the back end or bottom of the
ordinary cylinder. The gearing of the said second cylinder is so arranged that
when by the advance motion of the ordinary piston a mixture of gas and air in
being drawn in the ordinary cylinder the piston of the second cylinder is being
urged forward by the detonation which has taken place in it. By thus crossing as
it were the action of the two cylinders the pressure and percussion which in the
case of a single cylinder occur alternately on opposite sides of the parts referred to
occur only on one side the outward motion of the piston rod being effected by the
second cylinder instead of by the momentum of the fly wheel as in the case of a
single cylinder and the pounding referred to is wholly or in great part prevented.
Dated this 31st day of January 1893.
W. T. WHITEMAN,
Agent for the Applicant.
COMPLETE SPECIFICATION.
An Improvement or Improvements in Gas Engines.
I CHARLES WOLRYCHE DIXON, of No. 99 Harborne Road, Birmingham in the
County of Warwick, Mechanical Engineer do hereby declare the nature of my
invention and in what manner the same is to bo performed to be particularly
described and ascertained in and by the following statement :-
My invention has reference to gas engines of the kind in which the series of
actions commonly known as the "Otto cycle " occur, and has for its object to prevent
the jarring or "pounding" as it is technically called which occurs especially when
the said engines work at bigh speeds. The raid pounding is produced by tho nearly
alternate striking of the opposite sides of the bearings of the cross head piu, crank
pin and crank shaft upon the said parts; and my said invention has for its object to
prevent wholly or in great part the said pounding by the arrangement or
combination of parts heroinafter described.
In addition to the ordinary cylinder I employ a second or supplementary cylinder
in "tandem" that is in line with the ordinary oylinder. The said second cylinder

page_text: has a piston fixed to a piston rod which passes through a stuffing box and is
connected to the ordinary piston. The gearing of the said second cylinder is so
arranged that when by the advanced motion of the ordinary piston a mixture of
gas and air is being drawn in the ordinary cylinder, the piston of the second
cylinder is being urged forward by the detonation which has taken place in it. By
thus crossing as it were the action of the two cylinders the pressure and percussion
which in the case of a single cylinder occur alternately on opposite sides of the
parts referred to occur only on one side, the outward motion of the piston rod being
effected by the second cylinder instead of by the momentum of the fly wheel as in
the case of a single cylinder and the pounding referred to is wholly or in great
part prevented.
Figure 1 of the accompanying drawing represents in elevation and Figure 2 in
vertical section, taken in a plane at right angles to that in which the elevation
Figure 1 is taken, a vertical gas engine containing my invention; Figure 3 is a
horizontal section of the same taken on the line a, a Figure 2.
The saine letters of reference indiente the same parts in the several figures of
the drawing.
a is the ordinary cylinder of the gas engine in which the trunk piston b works,
the reciprocating motion of the said piston & driving in the ordinary way the crank
shaft c through the connecting rod, and crank head and pin at 6. In tandem or
in line with the ordinary cylinder a is the second or supplementary cylinder d
provided with the piston e, the piston rod ƒ of which passes through the stuffing
box g in the head of the ordinary cylinder a and is connected to the piston b in the
said ordinary cylinder as seen in Figure 2. The second or supplementary cylinder d
is connected to the top of the ordinary cylinder a by luga at on the two
cylinders, through which lugs, screw bolts are passed as seen in Figure 2;
i is the cam shaft driven from the crank shaft c in the ordinary way through the
worm gearing at k. The cycle of operations for working the piston bin the
ordinary cylinder a is effected through cams and appliances at about the middle of
the said shaft i, oue of the said cams being marked ; and the cycle of operations
for working the piston e in the second or supplementary cylinder d is offected
through cams and appliances at the upper part of the shaft i, one of the said cama
being marked m. The cams and appliances for working the said pistons baud e are
of the ordinary kind and are operated in the ordinary way but the positions of the
cams for working the respective pistons are reversed as will be seen by the positions
of the cams shown at and m.
By this arrangement of the operating mechanism or gearing of the two pistons 6
and the mixture of gas and air is being drawn in the ordinary cylinder a by the
advance of its piston b, while the pistone of the second cylinder d is boing urged
forward by the detonation which has taken place in that cylinder and the reverse.
It will thus be understood that by the crossing action described of the two pistons b
and e, that is, the urging forward of one piston by the detonation while the other
piston is drawing in the mixture of gas and air, the pressure and percussion which
in the case of a single cylinder gas engine occur alternately on opposite sides of
the bearings of the cross head pin, crank pin and crauk shaft, occur only on one
side of the parts referred to, the outward motion of the piston rod & being offected
by the action of the second piston e instead of by the momentuin of the fly wheel
as in the case of a single cylinder gas engine and the "pounding" referred to is
wholly or in great part prevented.
I do not think it necessary to represent the two sets of cams on the cam shaft i
and the appliances connected therewith for effecting alternately the cycle of
operations in the two cylinders, as the said cams and appliances are of the ordinary
kind and used in the ordinary way excepting in the respect that their positions are
reversed so that alternating actions take place in the two cylinders.
My invention may be applied to horizontal and inclined gas engines as well as tọ
vertical gas engines.

page_text: Having now particularly described and ascertained the nature of my invention
and the manner in which the same is to be performed I declare that I claim as
my invention of “An Improvement or Improvements in Gas Engines " ;—
The addition to or combination with the ordinary cylinder and its appliances of a
second or supplementary cylinder and its appliances, the said second or supple-
mentary cylinder being in tandem or in line with the ordinary cylinder and the
piston of the ordinary cylinder being connected to the piston of the second or
supplementary cylinder, and so arranging the gearing that the cycle of operations
is effected alternately in the two cylinders so that when by the advance of the
ordinary piston a mixture of gas and air is being drawn in the ordinary cylinder,
the piston of the second or supplementary cylinder is being urged forward by the
detonation which has taken place in that cylinder and the roverse, whereby the
pounding" or jarring produced in ordinary gas engines by the nearly alternate
striking of the opposite sides of the bearings of the crosshead pin crank pin and
crauk shaft upon the said parts is wholly or in great part prevented substantially
as hereinbefore described and illustrated in the accompanying drawing.
66
Dated the Eleventh day of October 1893.