Engine to be Operated by Means of Carbon Dioxide.
Year: 1899

page_text: Date of Application, 24th Jan., 1899 - Accepted, 22nd Apr., 1899
COMPLETE SPECIFICATION.
Engine to be Operated by Means of Carbon Dioxide.
I, LEWIS BOYD WHITE, Mechanical Engineer, of 1123 Broadway, in the City
of New York, Borough of Manhattan, County of New York, State of New York,
in the United States of America, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The object of my invention is to provide a new and improved engine to be oper-
ated by means of carbon dioxide, and which is simple in construction, strong
and durable, economical and very effective in use.
In the accompanying drawings forming a part of this specification and in which
like letters of reference indicate like parts in all the figures:
Figure 1 is a vertical longitudinal sectional view of my improved carbon dioxide
engine.
Figure 2 is a plan view of part of the same, parts being broken away.
The cylinder A contains the piston B which is fixed on the piston rod C guided
in suitable stuffing boxes D in the two heads of the cylinder, and said piston rod
is connected at one end with the cross-head E, which in turn is pivotally connected
with the connecting rod F. The cylinder is provided at each end with an inlet
port a and with an outlet port b.
I have shown one inlet port at one end and one outlet port at the opposite end
in Figure 1.
The two outlet valves G for one cylinder are fixed on a common rod H and cach
valve is contained in a separate casing J provided with suitable stuffing boxes I, etc.
On the piston rod an arm or tappet K is fixed which can act on two adjustable
collars L on the exhaust valve steni or rod H, and the said collars are so adjusted
that as the piston rod C reciprocates the tappet K strikes the two collars L in
such a manner that the valves G are alternately opened and closed, the valves being
so mounted that when one is opened the other is closed. The inlet valves M are
made in the form of poppet valves and cach has a valve stem R projecting
through a stuffing box N of the casing P containing the valve and the valves
are automatically seated by springs O in the casings.
Between the free ends of the valve stems R of the inlet valves a shaft S is
mounted transversely to the valve stems and by means of any suitable well known
mechanism, such as bevel gearing, said shaft is rotated from a movable part of
the motor, preferably the crank shaft.
The said shaft S is provided opposite the free ends of the inlet valve stems R
with a vertical slot passing completely through the shaft and having, for example.
the rectangular form indicated in the plan Figure 2; in this slot are inserted
two similar bars or plates T1, T2 (the faces of which are in contact with each other)
in such a manner that the plates can be easily slid either simultaneously or
separately in the said slots in the shaft S; these cams T1, T2 can afterwards be
fixed in position at various heights by a suitable arrangement such. for example,
as the keys x, x, shewn in Figure 1, which pass through holes made in the shaft S.

page_text: The cams T1 and T2 are moved in the slot of the shaft S so as to cause one of
them to project above the surface of the shaft, whilst the other is withdrawn into
the slot so as not to project; in the drawing the cam T¹ is shewn wholly within
the shaft and the cain T2 projecting. When the shaft S rocks the projecting
cam Twill act alternately upon the stems R of the valves so as to push them in
the direction of their length and each time open the corresponding inlet valve.
The part T acts when the engine is working in one direction and the part T2
acts when the engine works in the opposite direction.
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
1
1. In a carbon dioxide engine, the combination with a cylinder, piston and
piston rod, of an outlet valve at each end of the cylinder, means for operating the
outlet valves from the piston, an inlet valve at each end of the cylinder, each inlet
valve having an independent stem, which stems extend toward each other, a rock-
ing cam shaft between the adjacent ends of said stems and a cam on said shaft
which cam is in two parts either of which, as desired, can be caused to project
from the surface of the said shaft and which projecting part acts alternately and
directly upon the free ends of the said valve stems, and springs for closing the inlet
valves, substantially as herein shown and described.
2. In a carbon dioxide engine, the combination with a cylinder, piston and
piston rod, of an outlet valve at each end of the cylinder, a common valve stem
for said two outlet valves, means for actuating said rod from the piston rod, an
inlet valve at each end of the cylinder, each inlet valve having an independent
valve stem, which stems project toward each other, a rocking shaft mounted
between the adjacent ends of said stems and a cam consisting of two adjustable
plates either of which can be projected from the surface of the said shaft so as to
act alternately and directly upon the free ends of the inlet valve stems the
direction in which the engine is to work depending on which of the two plates
is put in operative position, substantially as herein shown and described.
Dated the 24th day of January 1899.
G. F. REDFERN & Co.,
4. South Street, Finsbury, London, Agents for the Applicant.