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Патент USA US2106903

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Feb. 1, 1938.
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A, TÓYNKIN
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2,106,903
-GAS MIXER
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Fil'çd March 27, 1956
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ATTORNEY.
Patented Feb. 1, 1938
2,106,903 '
UNITED STATES
2,106,903
GAS MIXER
Albert Tonkin, Cloquet, Minn., assigner of two
thirds> to J. L. Monnahan, Minneapolis, Minn.
Application March 27, 1936,'Serial No. '71,185
4 Claims. (Cl. 423-180)
This invention relates to gas mixers for internal
invention resides ín the air intakev mounted with«
combustion engines, and has special reference to in the extension 3, and which is provided with a
improvements in one particularly adapted for removable sleeve 2 I-slid into thev extension 3 and
use in feeding natural or similar gas to such an
which sleeve has a taperedy or conically shaped
5 engine.
bore 22; the outlet of the bore in the *outer> end of
The principal object of the invention is to pro
the sleeve being circular and controlled by the
vide a more practical and efficient carburetor for
valve 23 which'is reciprocably carried upon the
this purpose than heretofore known.
piston rod 2li attached to-'the Asleeve piston 25
Another object is to provide such a gas mixer within the cylinder 26. The tapered bore 22' of
10 having means automatically operable by the gas the sleeve 2i nis for the purposeof `regula-ting the
mixer when in action and hydraulically controlled. volu-me of air as the valve 23 is reciprocated;
Other objects and advantages of the invention that is to say the farther the valve 23 is opened,
will appear in the following description thereof. the ratio of the space for admission of the air is
Referring now to the accompanying drawing, progressively increased, and, of course, the reverse
15 forming part of this application, and wherein like occurs when the valve is being closed.
reference characters indicate like parts.
Within the cylinder 26 and upon both sides of
Figure l is a vertical central sectional View of
the piston 25 is carried suitable oil for modify
one of the improved gas mixers.
ing the action of the piston when it is operated,
Figure 2 is a transverse sectional View on the
and as the oil must be transferred from one end
line 2--2, Figure l, with portions thereof in ele
to the other of the cylinder when the piston is
vation for better comprehension.
reciprocated a passageway or by-pass 28 is pro
My improved gas mixer comprises the main vided, it being obvious that the reciprocation in
body portion l having three extensions 2, 3 and ¿I
therefrom, the extensions 2 and 4 being axially
disposed and of smaller diameter than the body
I while the extension 3 is of substantially the
same size as the body I; all being cylindrical in
construction. A transverse rotatable shaft is
indicated at 5 for control of the supply throttle,
..0 and a parallel shaft indicated at 6 passes through
the extension il for control of the butterfly valve
l, regulating the gas and air fuel supply to the
engine, and common to such gas mixers. These
two shafts are connected in the usual manner by
35 the link 5 and levers 9 and I0 so as to function
simultaneously.
The extension 3 embodies an automatic air
supply to the gas mixer which is governed hydrau~
lically and will be described later.
40
The gas supply connection is shown at Il, and
the gas is fed into the extension 2 of the gas mixer
through the port I2 and this port is controlled by
the vertically reciprocable valve head I3 carrying
the resilient valve cap or seat I4, this valve head
45 being normally held in closed position by the two
oppositely disposed expansive springs I5 and I6,
the pressure of the spring I5 being controlled by
the adjustable plug I1. The lower stem I8 of the
valve head I3 extends Within the spring housing
50 I9 which is mounted upon the eccentric 20 keyed
to the shaft 5 so that rotation of the shaft 5 will
raise and lower the valve head during the
throttling of the gas mixer.
While this construction of throttling the valve
5;-, may be old, one of the novel features of the instant
5
10
15
20
wardly of the piston rod is accomplished by the
vacuum of the engine, while it is held normally
outwardly by the expansive spring 21 carried 25
about the piston rod 24, within the innermost end
of the cylinder 26. It will be noted that the head
of the piston 25 is perforated and normally closed
by a small spring controlled washer-like valve
29 which will be released on outward motion of 30
the piston but close on inward motion thereof,
and, the cylinder 2S being full of oil, any move
ment inwardly of the piston as caused by the suc
tion of the engine not shown will necessitate
travel of the oil from the spring engaged side of 35
the piston through the port or passageway 28 to
the opposite end of the piston, whereas when re
turn action of the piston occurs the oil will readily
pass through the perforated head thereof. As a
control means for the passage of oil from one end 40
of the cylinder to the other I have shown the
manually operated needle valve 29, the adjustment
of which will regulate the flow of oil through the
by-pass 28.
It will be noted, too, that the cylinder 26 is an 45
extension of the cup-like pervious member 30
which is screw-threadedly mounted upon the
outer extremity of the extension 3 and forms
holding means for the sleeve 2I, having the frus
tro-conically shaped bore 22 therein.
50
From the above it is evident that I have pro
vided an eñìcient and practical form of gas mixer
designed for use in connection with natural or
other similar gas and having an automatically
adjustable hydraulically controlled air supply 55
2
2,106,903
therefor, which forms a principal novel feature of
the invention.
Having thus described my invention, what I
claim and desire to secure by Letters Patent, is:
1. The combination with a fuel gas and air
mixer having a main mixing chamber provided
with gas inlet and discharge ports, an air inlet
chamber communicating with said main mixing
chamber intermediate of said gas inlet and dis
charge ports, a valve for control of said air inlet
15
including a piston carrying rod, a cylinder within
which said piston reciprocates, an expansive
spring within said cylinder intermediate of the
piston and head of the cylinder towards said
valve to normally keepv the latter closed, said
cylinder being adapted to contain a body of oil
positioned upon both Sides of said piston, an oil
by-pass from one end of the cylinder to the other
and a manually adjustable valve within said by
20 pass to regulate the flow of oil from one end of
said cylinder to the other and thus control the
action of said valve.
2. The combination with a gas mixer of the
character described having a main mixing cham
25
ber provided with gas inlet and discharge ports,an airl inlet chamber communicating with said
main mixing chamber intermediate of said gas
inlet and discharge ports, a valve to control the
amount of air passing through said air inlet in
30
cluding a piston carrying rod, a cylinder within
which the piston reciprocates, said cylinder being
adapted to contain a body of oil to retard the
action of said piston, and spring means to hold
the valve normally closed.
3. 'I'he combination with a gas mixer of the Ul
character described having a main mixing cham
ber provided with gas inlet and discharge ports
communicating therewith, an air inlet chamber
intermediate of said gas inlet and discharge ports,
a Valve to control the amount of air passing 10
through said air inlet, a cylinder adapted to con
tain a body of oil, a piston Within the cylinder,
a rod connecting the valve and piston, means for
holding the valve normally closed, said piston
being retarded by the action of the oil in said 15
cylinder, and means-to vary the retarding in
fiuence of said oil;
4. The combination with a fuel gas and air
mixer having a main mixing chamber provided
with gas inlet and discharge ports, an air inlet 20
chamber communicating with said main mixing
chamber, a valve for control of said air inlet in
cluding a piston carrying rod, a cylinder adapted
to contain a body of oil and Within which said
piston reciprocates, a spring about the rod to-
normally keep the valve closed, and a manually
adjustable oil by-pass to regulate the flow of oil
therein from one end of the cylinder to the other
and thereby control the action of the valve.
30
ALBERT TONKIN.
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