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Патент USA US2080470

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May 18, 1937.
Filed Feb. 4, 1935
Fig‘: 1.
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attorney ’
Patented May 18, 1937
Alexis F. Gillet, Omaha, Nebr., assignor to E. A.
Laboratories, 1110., Brooklyn, N. Y., a corpora
tion of New York
Application February 4, 1935, Serial No. 4,905
6 Claims.
(Cl. 116-438)
This invention relates to suction operated sig
naling mechanism used in conjunction with any
suitable source of vacuum, or according to one
speci?c aspect the intake manifolds of internal
combustion engines which provide a motive
power for vehicles, said engines and manifolds
having throttle valves for regulating the amount
of fuel admitted to the engines, said manifolds
providing a source of suction through nipple
the invention will be more fully described here- 10
windshield wipers and the like accessories.
inafter and will be'more particularly pointed
out in the claims appended hereto.
In the drawing, wherein like symbols refer to
like or corresponding parts throughout the sev
fold is provided by the manufacturer thereof and
purposely is made of small bore for limiting the
" quantity of air admitted to the manifold there
through for the purpose of preventing an unde
sired degree of dilution of the fuel mixture for
the engine whereby the volume of air sucked into
the manifold through said tap is comparatively
20 small and inadequate for the production of loud
eral views:
Figure 1 is a vertical section of a signaling
mechanism embodying the present invention.
Figure 2 is a transverse section thereof taken on
line 2-2 of Figure 1.
Figure 3 is a plan view of the diaphragm em- 20
warning signals.
It is an object of the present invention to so‘
arrange the parts thereof that the comparatively
Figure 4 is a bottom plan view of the valve
Figure 5 is a vertical section of a fragment of
small quantity of air permitted to pass said tap
results in a flow of high velocity adjacent the
diaphragm of the present invention for providing
the sign-a1 showing the relative position of the 25
an efficient traffic warning device.
with respect to each other.
Another object of the invention is to provide
a device for the above stated purposes, the open
ing through the diaphragm of which is provided
with a comparatively restricted passageway there
through, said passageway being of less area than
the area of any portion of the connection or con
nections including a nipple screwed into said tap
03 Cl which is positioned between the intake manifold
of the engine and the said device, whereby air
incident to rushing through said restricted area
valve head and diaphragm in a retracted. position
Referring now to the drawing for a more par
ticular description, at 20 is generally indicated
a signaling mechanism including a casing pref- 30
erably formed of a lower half portion 2| and an
upper half portion 22. Said parts are substan
tially cup-shape in cross section, the member 2|
having an out~turned ?ange 23 and an inturned
?ange 24 and provided with a nut 25 for facili- 35
tating a connection of the signaling mechanism
with the intake manifold of an internal combus
of the diaphragm is increased in velocity adja
tion engine, said connection being provided with
cent the diaphragm for a more effective vibra
a suitable cut-off cock, not shown, for use at
times when it is desired to produce warning 40
The side wall of the lower half portion 2| of
the casing is provided with an annular shelf 26
for purposes later explained and the upper half
portion 22 thereof includes a flange 21 which may 45
engage the ?ange 23 to secure the casing parts
40 tion of the latter and/or the valve or plunger.
Thus, the pulsations imparted to the air in the
bell or horn portion of the new device results
in a louder and more efficient signaling sound
for warning traffic of the approach of the ve
A further object of the invention is to provide
a warning mechanism, the vibratable diaphragm
if which is provided with such a comparatively
restricted opening therethrough that the passage
50 of debris and abrasive sand particles is prevent
A still further object of the invention is to pro
vide a signaling mechanism, the vibratable dia
phragm or valve of which is provided with such
With the foregoing and other objects in view
taps secured thereto for operating defrosters,
The above mentioned tap on the intake mani
that the effective area of the valve when open
is of the same size or less than the area of the
suction passageway or connection between the
new device and the intake manifold of the engine
or source of suction, whereby the warning mech- 5
anism of the present invention operates with a
less amount of air than has heretofore been
utilized for automobile sound signaling purposes.
a comparatively restricted opening therethrough.
A bell or trumpet 28 is preferably employed for
amplifying sounds produced by the new device.
Air is freely admitted through said bell for a 50
communication at all times with the interior of
the casing by means of an annular collar 30 and
keepers 3|, as shown. The nut 25 is provided with
a threaded outlet port 32 for securing thereto
a conduit 32'. Such securing means may in- 55
clude a threaded sleeve and a packing unit car
that the capacity or bore through the nipple
ried thereby for locking the end of the pipe 32'
to said sleeve, as shown in Figure 1.
Before securing the casing portions together a
transversely disposed diaphragm 33 and a valve
inch, whereby a comparatively small volume of
air will ?ow from the chamber 39. Preferably
head 34 carried by a resilient spider 35 are placed
twin warning mechanims are in communication
with said nipple for producing dual tones simul
within the housing and arranged as shown in
Figure 2.
through the diaphragms of the twin horns is
The diaphragm 33 is provided with a centrally
disposed aperture 38, said diaphragm subdividing
the casing and providing a chamber 39 at the
suction side thereof and a chamber 39’ at the
air inlet side thereof. It will be understood that
communication between the chambers is estab
lished throughthe valve and diaphragm thus de
IO in
can be no larger than substantially .06201 square
The combined area of the opening
.0603 square inch which
less‘ than the area or
bore of the nipple or fitting attached to the tap 10
5|], said bore being .062 square inch. It is, of
course, obvious that if a greater of lesser num
ber of units are employed, the proportions herein
emphasized will be followed, i. e., the combined
effective area of the diaphragm opening or open
scribed at times when the valve is open. In this ' ings should preferably be less than the area of
connection it will be understood that washers the tap 59. To this end, the bore of the tap may
or shims 36 of suitable material are preferably ' be increased in size or the spacing of the parts of
interposed between the diaphragm and casing the unit may be varied so as to reduce the effec
portions so that all air ?owing through ‘the (has? tive space through which the air flows.
In the operation of prior art devices the com
ing will have to pass/through the diaphragm.
paratively ‘small amount of air permitted to be
The valve-head 34 is adapted to seat against sucked through them 'on account of the re
and contact with the diaphragm at times, said stricted bore of the tap 50 and passed into an
head being secured by any suitable means, such intake manifold causes a correspondingly small
as the rivet illustrated, to the spider 35. The degree of suction to be applied within the cham
spider may be‘ formed of any suitable, and pref
ber of their valve mechanisms, said chamber be
erably, resilient material. It may include any ing of comparatively large area for providing
suitable number of arms bearing against the shelf adequate room for said valve therein conse
26 as indicated at 4| and serving constantly to quently decreasing the velocity therethrough to
maintain the axes of the diaphragm opening and such an extent that a proportionately lesser
valve head in alignment. The head is provided amount of vibrations were imparted to the dia
phragms and/or valves.
with a sleeve 42 which extends through the open
ing of the diaphragm at all times and restricting
In the operation of the instant invention, in
the opening through the diaphragm during re
cident to the restricted passageway for air
through the diaphragm thereof a Venturi-tube
ciprocating movements of the parts. The diam
eter of the opening through the diaphragm or like action is provided increasing the velocity
of the air passing through the diaphragm pro
aperture is substantially .810 inch and the out
side diameter of the sleeve is .786 inch whereby viding more effective vibrations and louder sig
the width of the annular space between the wall nals. It will be noted that a comparatively small 40
of said aperture and the outer wall of said sleeve amount of suction applied to the chamber 39 of
or periphery is .012 providing an annular open
the present unit is adequate to produce an em
ing therebetween, the total area of which is .03015 cient warning signal; the diaphragm opening be
ing restricted relative to the connections between
square inch. The diaphragm is formed of re
silient ima'te‘rialpreferably copper bearing metal the new device and the intake manifold of the
and the thickness thereof is substantially about engine.
The instant invention, among other of its ad
.004 inch. The foregoing stated dimensions are
given for facilitating construction of a device and vantages, provides means for preventing abrasive
debris and the like from passing through the
these proportions have been ascertained after la
borious experimentation as conducive to good mechanism, and without muting the sound pro
jected from the trumpet. Such debris in order
to pass the mechanism must be of a less diam
An engine or source of suction is generally in
dicated at 48 having ‘an intake manifold 49, the eter than the width of the annular opening or
latter provided with the heretofore mentioned the space indicated at 38, said width being sub
tap indicated at 59, to which the conduit 32’ is stantially .012 square inch.
connected for communicating suction generated
Thus, with vacuum existing in ‘chamber 39,
by the reciprocating pistons of the engine to the the valve head 34 will move rearwardly against
the resistance of the spider 35-or its equivalent.
new'device for an actuation thereof. Such mani
fold and engine, together with the tap, are well If the diaphragm is relatively ?exible (this pref
known, and it is believed that they do not require erably being the case), the ‘diaphragm will also 60
particular illustration or detailed description.
be acted ‘upon by the vacuum to ?ex rearwardly.
A cut-01f valve such as or similar to the valve
However, vdue to the mounting of this member,
for ‘a vsimilar purpose illustrated and explained it is obvious that its elastic limit is not equiva
in my aprior Patent No. 1,869,142 may be posi
lent to the elastic limit of the spider. There
tioned between the ends of the conduit 32’ for fore, a condition will be reached wherein the
totally cutting oil’ suction applied to the new valve head continues ‘its rearward'movement al
device, said cut-o? valve when open permitting though the diaphragm has ceased such move
suction to be communicated within the capacity ment. At that instant the sealing contact be
of the said tap and conduit 32'.
tween the valve and the diaphragm will become
The bore of the tap 59 is purposely made com
interrupted and the suction within chamber 39
paratively small by the manufacturer of the man
will be broken, and while the valve may continue
ifold for limiting the amount of air which can be to move rearwardlyffor an additional fraction of
sucked into the manifold therethrough and it a second, the diaphragm will return to its normal
will be understood that the largest ?tting‘or nip
ple which can be screwed into such tap'is such
position and, in fact, ?ex to a point beyond the
As soon as the spider or the equivalent 75
resilient member overcomes the tendency of the
valve body to move rearwardly or inwardly, it
eluding a casing formed with an inlet port and
an outlet port, the latter being connected to a
source of suction, a vibratory diaphragm disposed
it engages the diaphragm. Whereupon the vac- v between said ports and formed with a valve aper
uum will again build up in chamber 39 and the ture, a reciprocable valve closure mounted in
entire operation will be repeated. Of course, if said casing, a sleeve forming a part of said valve
the diaphragm is relatively stiff, it will ?ex to closure and extending through said aperture, and
said sleeve having a diameter less than the diam
only a very small degree, and if its rigidity is in
creased, substantially no flexion of the diaphragm eter of said aperture.
4. A warning signal generator including a cas
10 will result. In such cases the sound will be pro
duced solely incident to the vibration of the valve ing having intake and outlet openings, the lat
will move the same forwardly or outwardly until
body or head and as the latter vibrates in the
ter to be connected to a source of suction, an
rapidly moving air stream ?owing between the
edges of the diaphragm aperture and the side
be produced incident to any single one or com
apertured vibratory diaphragm within said cas
ing and through the aperture of which air passes
in its flow from said inlet opening toward said 15
outlet opening, reciprocable means Within the
casing and extending into the diaphragm aper
ture for varying the volume of air passing through
said aperture, means for maintaining the effec
tive area of the aperture substantially constant 20
during the operative movements of said recip
bination of the following four factors: First, the
rocable means and such effective area under op
rapid contacts occurring between the diaphragm
erating conditions being less than the effective
area of the outlet opening whereby the velocity
with which the air is ?owing from said outlet
opening is increased in its passage through said
15 face of the valve.
Of course, the position of the
parts may be adjusted to operate under the best
possible conditions consistent with the factors
present in any given installation. However, un
der all circumstances, vibration will occur at
20 acoustical frequencies and the warning note will
or plate and the valve head; second, the vibra
25 tion of the diaphragm; third, the vibration of
the valve head; and, fourth, the intermittent ?ow
and consequent pulsating of the air column With
in trumpet 28, opening 29, and chamber 39'.
It is obvious that various changes and modi
?cations may be made in the details of con
struction and design of the above speci?cally
described embodiment of this invention without
departing from the spirit thereof, such changes
and modi?cations being restricted only by the
scope of the following claims.
What is claimed is:—
l. A suction actuated signaling mechanism in
cluding a casing having an outlet port to be con~
nected to a source of suction, said casing also
40 having an inlet port, a vibratory diaphragm
diaphragm aperture.
5. A suction actuated warning mechanism in
cluding a casing having inlet and outlet ports, the
latter to be connected to a source of suction, a 30
vibratory diaphragm in the casing and formed
with an aperture for the passage of air from the
inlet port towards the outlet port, a reciprocal
valve positioned within said casing and having
a body cooperating with the aperture of said dia
phragm to open and close the same, an extension
forming a part of said bodyand projecting through
the aperture of the diaphragm, the area of the
diaphragm aperture when fully open being less
than the effective area of the casing outlet, said 40
mounted within the casing and disposed between
said ports, said diaphragm having an aperture,
and a reciprocating valve extending through said
diaphragm aperture, the effective area of the
45 diaphragm aperture with said valve in fully
unseated condition being less than the effective
area of the casing outlet.
2. A suction actuated signaling mechanism in
cluding a casing having an outlet port to be con
50 nected to a source of suction, said casing being
diaphragm being ?exible, and means for urging
said valve into sealing relationship with respect
to the diaphragm aperture.
also formed with an inlet port, a vibratory dia
phragm within said casing and formed with a
structing relationship with respect thereof, the
centrally disposed aperture, a valve extending ad
jacent said diaphragm aperture, and a sleeve
?xed to said valve and projecting through said
aperture, the effective operative area between the
sleeve and edge of the diaphragm aperture being
6. A horn including a casing formed with inlet
and outlet openings, a vibratory diaphragm 45
mounted within said casing and formed with an
aperture, a valve disposed within said casing and
between the diaphragm and the outlet opening
thereof, means for yieldingly urging said valve
toward said diaphragm and into aperture ob 50
body of said valve being of larger area than the
area of said aperture, a sleeve forming a part of
said valve and extending through said diaphragm
at all times less than the effective area of the
aperture, the area of the space between the body 55
of said valve, the sleeve thereof, and the adjacent
aperture edges, being less with said valve in fully
unseated position than the area of said outlet
casing outlet.
3. A suction actuated signaling mechanism in
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