Improvements in Gas Engines.
Year: 1898

page_text: Date of Application, 22nd Nov., 1898-Accepted, 14th Jan., 1899
Improvements in Gas Engines.
We, EDMUND EBERT ALLYNE, residing at No. 166, Dunham Avenue, in the City
of Cleveland, County of Cuyahoga, and State of Ohio, U.S.A., Purchasing Agent,
and RALPH GUSTAVE ANDERSON, residing at No. 219, Streator Avenue, in the City
of Cleveland, County of Cuyahoga and State of Ohio, U.S.A., Cashier, do hereby
declare the nature of this invention, and in. what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement —
This invention relates to improvements in gas engines, constructed and operating
substantially as shown and described and particularly pointed out in the claims.
In the accompanying drawings, Fig. 1 is a sectional elevation of a part of a
sewing machine frame and an engine and connecting and operating mechanism
between engine and shaft, as hereinafter described.
Fig. 2 is an enlarged longitudinal section of the engine and a plan view of other
operating parts connected therewith.
Fig. 3 is a group view of the cam for operating the exhaust valve shown in three
different positions so as to clearly disclose its construction. Fig. 4 is a sectional
elevation of the gas controlling valve and mixer.
Now, having reference to the accompanying drawings, A represents the cylinder
of a gas engine or motor, having a head B through which it is shown as supported
from the table A¹ of the sewing machine. Preferably the manner of connecting
with table A¹ is by means of an adjustable pivot, so as to give any desired angle
of inclination to the engine, the means in this instance consisting of a bracket
extension a secured to table A¹ and having the head B pivoted thereon at a¹ and
provided with a finger a² and adjusting screw a³ therein bearing against the
bracket a and fixing the angle.
C represents a shaft which is driven by the motor and c the crank thereon, and D)
is the piston rod connected with the said crank. E is the balance or fly wheel
on said shaft.
G represents our new and improved form of cam collar or sleeve for actuating
the exhaust valve of the engine. Several special features distinguish this cam
from all others known to us and adapt it to our particular use. Thus it will be
observed that said cam has the form of an ordinary cylindrical sleeve from end
to end and is of equal cross section at all points from end to end except that at
one end there is an abrupt lateral cam projection 2. This projection occupies
at its base only about one third of the circumference or circular area of the sleeve,
leaving the remainder plain, and tapers on both edges to a short rounded point.
A double groove, channel, or track extends around the sleeve, and for convenience
said tracks or channels are designated separately by 8 and 9, which tracks are
parallel except where they cross at 9. which is opposite the cam or projection 2.
and where they are deflected for this purpose. The track 9 traverses the cam 2
and the track 8 the plain end of the sleeve.
Now, in order to understand this construction, reference is had to the exhaust
valve 0 of the engine, and the sectional stem L, M, N, and wheel H through which

page_text: said valve is actuated, intermittently, from or by the cam sleeve G. It will be
noticed that the section L carries valve 0 and. has a limited direct sliding move-
ment in the head B. About the said section or rod outside of head B is a spiral
spring bearing against the said head at one end and against a flange on said
rod at the other end and designed to actuate the valve in the direction opposite
to the actuation through cam G. The section M of the valve rod has a loose con-
nection with section L and is engaged therein and through the flange a³ on the
cylinder A so as also to have only a rectilinear or direct movement, though it
might be rotatable in these bearings if preferred. It is the head N which carries
wheel H and in this head the section M is socketed against a spring h.
head N is supported in a sliding bearing in the supporting arm P, in which it can
slide lengthwise and rotate to meet the needs of wheel H. as it follows the tracks 8
and 9 alternately but has no lateral movement.
The
When the exhaust valve which controls passage o is to be opened the wheel H
rides over the cam g, but said wheel remains in the uniformly deep portions of
the tracks 8 and 9 during the time when gas is supplied and compressed in the
cylinder and the explosion and subsequent expansion occur. At these times the
exhaust valve is closed by spring l Three movements of the piston D in
the cylinder A, therefore, necessarily intervene while the valve controlling wheel H
is traversing the tracks 8 and 9 off the cam 2, and the said wheel H travels once
and two thirds around the sleeve each time, after leaving the cam before re-
ascending, and these movements are kept up continuously and automatically, and
of course are timed with respect to the action of the other parts of the engine.
The exhaust valve O is opened when the piston makes its first return stroke after
an explosion, and said valve closes on the reverse stroke when a fresh supply of gas
is drawn in. This having occurred, the compression stroke of the piston takes
place, and following this the explosion or power stroke. During these three
strokes the wheel H is making the rounds of the channel 8 and 9 off the projec-
tion 7 and getting round to mount said projection in time to provide for the exhaust
stroke, which is necessarily short and quick, requiring a cam that has an abrupt
turn from the ascent to the descent so as to allow instant closure of the exhaust
valve.
In the foregoing operation the cam sleeve G must adapt itself to the limited
position of the wheel H, because said wheel is supported in a head which can only
turn axially but cannot vibrate to enable the wheel to follow the grooves 8 and
here and there.. Hence the said sleeve is engaged by a spline 4 to turn with the
shaft C but has a free sliding movement back and forth thereon to meet the
wheel H.
gas
The gas enters through port 10 past valve 11, which acts automatically with the
engine, and a gas controlling outlet valve or cock 12 is arranged in the
passage 13 to said valve 11, and has a transverse opening into which is tapped a
duct from the lower end of the cock to receive air and mix the same with the gas.
A valved plug 14 affords inlet of air to passage 13, but seals itself against back
pressure. More or less gas is admitted by rotating plug valve 12.
Ignition of the gas occurs through contact of the finger 15 on piston D with
the platinum igniter 16, which is insulated in a threaded plug screwed into the
cylinder and removable with said ignition.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, we declare that what
we claim is: -
1. A shaft and a double-tracked cam sleeved on the shaft and constructed to
slide to bring the tracks successively into the same plane for action, in combina-
tion with the part actuated by said tracks and a travelling member on said part
running in said tracks, substantially as described.
2. The shaft and the double tracked cam sleeved thereon and free to slide to
and fro in action, in combination with the valve rod, and supports therefor con-

page_text: structed to prevent vibration of the rod, and a traveller on said rod running in the
tracks of the said cam, substantially as described.
3. The engine and a sectional valve controlling rod therefor, and guides for
said rod constructed to prevent the rod from vibrating, in combination with the
main shaft, a sliding cam sleeved thereon and having two parallel tracks crossing
into each other at one point, and a travelling member on the valve rod running
in the tracks on said cam, substantially as described.
4. The shaft and the sliding cam thereon having a double track with a path
from one track to the other, in combination with a sectional rod having a head
section and a rolling member thereon running in said cam, and a spring to hold
said section and rolling member in operative position, substantially as described.
5. A shaft and a cam sleeved thereon to have a sliding movement when in
action and provided with parallel tracks having open communication at one place,
in combination with a valve rod and a revolving member on said rod constructed
to run in said tracks, supports for said rod confining the rod to direct and rotary
movements, a torsional spring to keep the said rolling member in working relation
and a spring to close the valve and press axially on the valve rod, substantially
as described.
6. The valve rod consisting of a middle section and outer and inner end sections
loosely connected, a spring for the inner section to seat the valve, and supports for
said sections in which they are limited to axial movements, in combination with
a double tracked cam and a shaft on which the cam is slidably supported, and a
disk on the valve rod travelling in the tracks of said cam, substantially as
described.
1000
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents, 62, Saint Vincent Street, Glasgow,
Agents for the Applicants.