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Патент USA US2122243

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Filed. Feb, 18, 1937
Patented June 28, 1938
PRESSURE canes ron netrunner. cous
'rioN morons
.lohn Bonnard, West New York, N. J.
Application February i8, 193'?, Serial No. 126,421
2 Claims.
il is attached on the lower end of the member lil
and has a threaded portion I la adapted to engage
This invention relates to new and useful im
provements in a pressure gauge for internal com
bustion motors.
The invention has for an object the construc-'
of a pressure gauge which is adapted to be
substituted for each of the spark plugs of an auto
mobile engine or other engine and to~register the
into the spark plug opening of one of the cylin
ders of the motor. A tubular bushing .l2 is at
tached upon the upper end of the member l0
and is adapted to support a pressure gaugevlâ.
pressure built; up in the cylinders during the
A one Way valve It is mounted within the bot
torn bushing il. Another one Way valve l5 is
running of the engine on some of its cylinders,
or during such time when the engine is being
turned over, either manually or mechanically.
The` purpose of this test is to locate trouble in
mounted within the top bushing i2. A three way
cock I6 'is associated with the top bushing .for
controlling the passage of air to the gauge;
The bushing ll has a reduced end ilb over
tion of a pressure gauge which is characterized
by a tubular member forming a compartment, a
pressure valve mounted in one end of the tubular
supports a washer lil' which serves as a “stop”
member, and an arrangement for mounting the
valve seat i8 is mounted within the bushing il
and the valve tél comprises merely a sphere
adapted to seat upon one end of the seat mem
ber it. The valve Hl is limited in the distance it
may move ofi the seat by the spring ita. The
valve Ell permits pressure to pass upwards into
the compartment llla and prevents backwash or' 25
the engine, such as excessive leaking pistons and» which the tubular member l@ seats. A pin il is
engaged through the tubular member and bush
The invention has for an object the construc- ' ing for attaching these parts together. This pin
20 other end of the tubular member in place of a
removed spark plug of the automobile or the other
Still further the invention proposes a novel
construction of valve associated with the tubular
N) Ol member so as to hold pressures built up therein.
for one end of a coil spring ida. The other end
of spring lila presses against the valve ball lil. A
It is thus possible to register the highest pres
the pressure.
sure without requiring fast reading of the gauge
due to rapid fluctuations of the ordinary pres
The bushing l2 is formed with a reduced por
tion i2a over which the top end of the tubular
member lil engages. A valve seat i9 is supported
upon the bushing l2 and the valve l5 is coopera 30
tive with this seat. Pins 20' engage through the
tubular member i@ and the bushing l2 for con
sures within a motor cylinder.
Still further the invention proposes an arrange
ment by which the valves may be temporarily in
operative when desired so that the fluctuating
pressures may be examined.
For further comprehension of the invention,
necting these parts together. A coil spring l5’
and of the objectsl and advantages thereof, ref
is provided to press the valve ball l5 against
valve'seat i9. The top end of the bushing l2 has 35
erence will be had to the following description
a threaded bore 2l into which the pressure gauge
and accompanying drawing, and to the appended
i3 may be engaged.
claims in which the various novel features of the
gauge are immaterial and therefore Will not be
The details of the pressure
invention are more particularly set forth.
given in this specification.
Inlthe accompanying drawing forming a. ma
terial part of this disclosure:
The cock valve i@ is a three way valve. It 40
controls a vent passage 22 through the side of
Fig. 1 is a -side elevational View of a pressure ' the bushing i2 into the atmosphere.
gauge constructed according to this invention.
Fig. 2 is a vertical sectional view of the gauge
shown in Fig. 1. _
through the bushing to the pressure'gauge i3.
The cock l@ when in the position as shown in 4:5
Fig. 3 is a horizontal sectional View taken on
the line 3_3 of Fig. 2.
Fig. ’i is a horizontal sectional view taken on
the line ?l~-ß of Fig. 2.
Fig. 5 is a fragmentary vertical sectional View
similar to Fig. 2 but illustrating a modification or'
the invention.
It also con
trols a passage 23 from the tubular member lll
Fig. 2 has the tubular member l@ and the gauge
i3 connected with atmosphere. It may be ro
tated through 90° or 180° to control the-pressure
as desired.
The purpose for having the two
valves lil and l5 with the chamber lila interposed
therebetween is to prevent fluctuations of the en
gine from directly acting upon the gauge i3 to
The'pressure gauge for motors, according to » cause rapid changes in the gauge preventing it
this invention, comprises a tubular member l@ from being read properly. With each explosion
of the engine a fast sharp moving pressure is set
55 forming a compartment i632'. A tubular bushing
up which would cause sharp changes in the pr - .
While I have illustrated end described the pre
sure gauge. When this sharp moving pressure ferred embodiments of my invention, it is to be4
passes the valveflid- and enters the chamber |02. understood that I do not limit myself to the pre
it has ample spacewithin which to lose its jerky
motion-and smooth out before passing the valve
I5 to enter the gauge I3 atan even pace to per-A
cclse constructions herein disclosed and the right
is reserved-to all changes and modiilcations com
ing within the scope of the invention as deñned
mit the gauge to accurately measure its velocity. ' in the appended claims.
The operation of the device is as follows:
Having thus described `my invention, what‘ï
A spark plug of an internal combustion en
10 gine or similar engine is removed and in its claim as new, -and desire to secure by United
States Letters Patent is::
stead the pressure gauge is mounted. The
1. A pressure gauge- for internal ,combustion
threaded endV Ilß is» screwed into the threaded . engines or the like, comprising a. tubular member
opening which ‘previously held the spark' plug.
The engine is then ‘operated on its other cylin
15 ders. The pressure built up within the cylinder
will be forced i'nto the compartmentV Illa. "I'he
. valve I4 lifts to permit the pressure to enter,
forming a compartment, ua tubular bushing at
tached on the lower end of said compartment
and threaded for engaging _into the spark plug 15
opening of one of the cylinders of said engine,
a tubular bushing attached on the upper end of
said tubular member and adapted to support a
up'in the compartment lüa _the valve l5 will lift pressure gauge, a one way valve in the bottom
but prevents exit. “As the pressure is being built
20 and permit the pressure to reach the gauge i3. «In
order to do this it is necessary that the cock I6 be
in a position turned 180° from the position shown
lnVFig. 2. The gauge I3 will ~`how the maximum
pressurel produced in the cylinder of the engine.
25 'I'he cock i6 may then be turned to release the
bushing for controlling the entrance of pressure 20
into said -compartment, a. one way valve in said
topbushing for controlling the entrance of pres- .
sure from said compartment to said pressure
gauge and so prevent the transmission of possible
ñuctuations, and pressure inv said compartment,
pressure withinJ the- compartment IUS and the` and a three Way cock valve for controlling said
_gauge which then discharges into the atmos- j pressures to connect
with said gauge or with at
In' Fig. 5 a modification of the invention has
.30 been disclosed in which an arrangement is pro
vided tojhold the'valves inoperative so that the
- mosphere,
each tubular _bushing
having a re
duced portion over which the ends of the tubular
>member engagé, and a pin engaged through these 30
ends for holding the parts together, said pin
fluctuating pressure within the cylinder may be serving as a. stop for said valves.
examined. The arrangement4 consists in each of
2. A pressure gauge for internal combustion en
the valves` I 4 and I5 being provided with a de
gines or the like, comprising a tubular member
pressible plunger 24 arranged to hold the valves '-forming -a compartment,_a tubular bushing at
against the'side wall ofthe tubular bushing;- and
tached on ïthe lower end of said compartment
so, inoperative. ` The plunger 26 is normally
urged into an inoperative position by a spring
25 ~which acts against a. flange 26. formed on the
and -threaded for engaging into the spark- plug
opening of one of the cylinders of said engine,
avtubular bushing f attached on the upper end
40 plunger'Zä and a'plug 2l mounted upon the bush-r, of said „tubular member and adapted to support
ing. A packing gland 28 is. also associated with a pressure gauge, a one way valve in the bottom
the plunger 24 -to prevent leakage of pressure. bushing for controlling the entrance of pressure
The plungers 2t normally extend to the exterior into said compartment, _a rone way valve in said
so that they may be depressed. .
top bushing for controlling the entrance of pres
The operation of the modiiled form of the -in- ~ sure from said compartment. to said pressure
gauge and so prevent the transmission of pos
vention is identical to the 'preferred formexcept
for -the fact that one or both of the plungers 24
may be manually- depressed for incapacitating
one or both of the valves-»the valves I4 and i5.
50 The gauge will now show the ñuctuating pressure
_ which maybe examined with necessary instru
ments, or the naked eye.
Another test for the internal combustion motor>
would be to remove all ,of the spark plugs at one
55 time and to substitute pressure gauges as de
scribed in this invention for each of the spark
plugs. It -is then necessary that the motor be
manually turned over or mechanically turned
over for ascertaining its condition.>
sible iluctuations, and pressure in said compart
ment, and a three way cock valve for controlling
said pressures to connect with said gauge or with
atmosphere,l each tubular bushing havinga‘re
ducedv portion over which the ends of the tubular
member engage, apin/ engaged through these
ends «for holding the parts together, and a plate
on said pin against whichsaid valve abuts for
acting as a stop for said valve.
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