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April 5, 1949.
H. Tl-:TREAULT
TWO-CYCLE ENGINE AND COMPRESSOR
Filed May 27, 194s
2,466,132
Patented Apr. 5, 1949
2,466,132
UNITED ySTATES lPATENT GFFECE
2,466,132
TWO-CYCLE ENGINE AND COMPRESSOR
Hector Tétreault, Montreal, Quebec, Canada
Application May 27, 1946, Serial No. 672,381
1 Claim.
l
(Cl. 23u-_56)
The present invention pertains to a novel two
2
carry the cylinders of the engine, as will pres
cycle engine and compressor, and the principal
object is to provide a device of this character in
which the cylinders, horizontally alined, are not
rigidly anchored, in order to eliminate undue
strains on the structure.
In the accomplishment of this object the alined
cylinders are carried by supports which in turn
ently be shown. The sliding uprights 2 carry
opposed cylinders 3 and 4 fastened by bolts 5. The
intermediate uprights 2 are extended to form
the spaced end Walls or bottoms 6 of the cylinders
3, 4 which are spaced apart. Between these is
fastened an alined and intermediate cylinder ‘I
by means of bolts 8 for a purpose that will pres
are slidably mounted on a base. Although the
ently be described.
mechanism is for the most part in dynamic bal 10
The head of each cylinder is jacketed at 9 and
ance, any unbalance that occurs is permitted to
provided with a spark plug I0 in the end. Each
cylinder is also formed with a by-pass II posi
become converted into a sliding movement of the
supports, in the absence of a rigid anchorage.
tioned to lead from one side of the enclosed pis
At the ends of the base are provided shock ab
ton to the other at certain intervals for the usual
sorbers which are engaged by the supports in 15 two-cycle operation. Also, each piston is formed
the event the supports reach an extreme position.
with injection ports I2 and I3 respectively at the
Between the alined engine cylinders is mounted
head and 'by-pass for priming.
a compressor cylinder sealed therefrom. A com
mon piston rod carries a piston in each of the
three cylinders, the intermediate piston operat
Exhaust pipes
I4 lead from the opposite or inner ends adjacent
to the walls G.
'
A piston rod I5 is mounted axially in the alined
ing as a compressor inasmuch as its cylinder is
cylinders and is supported in bearings I6 on the
provided with fluid inlet and outlet means at.
end walls 6. Pistons I'I are carried by the ends
opposite sides of the piston.
of the piston rod and work in the respective cyl
The engine cylinders are equipped for two
inders 3 and 4. Another exhaust port I8 is
cycle operation in which certain ports are con 25 formed in each cylinder head and is adapted to
trolled by the piston in the usual manner. The
be covered at times by the corresponding piston
invention is applicable to both steam and internal
I‘I as in the usual two-cycle operation.
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combustion engines, although the latter is illus
Each cylinder carries externally a'ñxed con
trated herein. The internal combustion engine
tact I9 and a movable contact 20 controlling the
is equipped With electrical ignition means, and 30 corresponding ignition circuit. Each Contact 20
in this connection a further object of the inven
is carried on a stem 2I passing slidably through
tion is to operate the ignition circuit in timed
the cylinder wall and there attached to a spring
20
relation by means of the engine pistons. p
lever 22. ' The flared skirt 23 of the cylinder is
adapted to Wedge between the lever 22 and the '
For this purpose the ignition means for each
cylinder is in a circuit with a fixed and a mov
35
able contact mounted on the cylinder wall. The
movable Contact is connected through the cyl
inner cylinder wall, thereby closing the ignition
circuit at the proper time.
v
In the intermediate cylinder 1, the piston rod
inder wall to a lever positioned within the cyl
I5 carries a compressor piston 24. The cylinder
inder and spaced slightly from the inner cylinder
‘I has intake and-exhaust ports 25 and 26 respec
wall. The skirt of the piston is tapered to enter 40 tively for air or other fluid. It is thus apparent
between the lever and the cylinder wall and thus
that the piston 24 within the cylinder ‘I operates
operate the movable contact and close the igni
as a compressor.
tion circuit at the proper time.
It has been stated that the uprights 2 are
The invention is fully disclosed by way of ex
freely slidable on the base I. The pistons and
ample in the following description and in the 45 cylinders remain -for the most part in dynamic
accompanying drawings in which:
balance without restraint on the uprights 2.
Figure 1 is a longitudinal section of the device,
However, some shifting might occur, and this is
partly in elevation; and
permitted to take place rather than provide rigid
Figure :2 is a section on the line 2--2 of Fig
ure 1.
Reference to these views will now be made by
`use of like characters which are employed to
vdesignate corresponding parts throughout.
In Figure 1 is shown a horizontal base I on
which are mounted uprights or shoes 2 which
50
anchoring means for the cylinders.
At each end of the base I is provided a shock
absorber including a bumper l2‘I having a stem
28 projecting slidably through a iinger 29 on the
base. The stem is surrounded by a shock absorb
ing spring 30 bearing lon the head and the finger.
‘ 2,466,132
3
Thus, if either upright approaches an end ofthe
controlling the ignition means, levers in the
base> I, it is automatically cushioned'.
engine cylinders and connected to said movable
`
Although a'specific embodiment of the inven
contacts, the pistons in the engine cylinders hav-,
tion has been illustrated and described, it will
ing tapered skirts each adapted to wedge be
be understood that various alterations in `the
details of construction may be made without de
parting from the scope of the invention as‘in
actuate said movable contacts.
tween a lever and the adjacent cylinder wall to
dicated by the appended claim.
What l', claim as my invention is:
HECTOR. TÉrREAULT.
l
A two-cycle engine and compressor compris 10
ing a pair of engine cylinders mounted in hori
zontal alinement and spaced apart, a compres
sor cylinder mounted between the engine cylin
ders. a piston rod slidable- axially in the several
cylinders, pistons carried by said rod and work
ing in the respective cylinders, intake and ex
haust means for the several cylinders, ignition
means in the engine cylinders, and iìxed and
movable contacts on said engine cylinders for
REFERENCES CITED
\
l
The following references are of record in the ì,
iile of this patent:
UNITED STATES PATENTS
Number
Name
Date
16
804,884
1,389,424
2,182,816
Rutan ___________ __ Nov. 21, 1905
De Brun __________ __ Aug. 30, 1921
Moffett __________ __ Dec. 12, 1939
2,382,598
Andresen ________ __ Aug. 14, 1945
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