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Патент USA US2117213

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May 10, 1938.
c. H. H. RODANET
2,117,213
ELECTRIC SWITCH WITH MANOMETRIC CONTROL
Filed July 30, 1956
8
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INVENTORI
CHARLES H ILAIRE
HENRI RODANET
,
Mfy.
AT TOR N 5Y5
May 10, 1938.
2,117,213
0. H. H. RODANET'
ELECTRIC SWITCH WITH MANOMETRIC CONTROL
2 Sheets-Sheet 2
Filed July 30, 1936
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. Patented May l0, 1938
‘ I 2,111,213
UNITED STATES PATENT OFFICE
,
2,111,213
ELECTRIC swrrcn wrrn momcrarc
CONTRDL
Charles Hilaire Henri ltodanet, Nenllly-sur-Seine,
France, aasignor to Société Anonyme: Etablis
sements Ed. Jaeger, Lavallois-Perret, France
_ Application July 30, 1936, Serial No. 93,423
In France June 18, 1936
_
2 Claims.
(Cl. 200-83)
'Ihis invention relates to an electric switch
with manometric control, and is particularly
characterized by the fact that the ?uid, which
by‘ pressure controls the operation of the switch,
5 acts on a ?exible diaphragm capable, upon being
distorted, of acting on the movable contact of
the electric switch.
The main object of the present invention is
to have a switch control provided with a ?exible
l0 diaphragm mounted in a ?uid-tight manner
within a casing in which are also arranged the
contacts of the switch, and which may also be
secured, at its periphery, on a rigid disc of sub
stantially conical shape and on the periphery of
15 which bears the- bentdown edge or ?ange of .
another disc on which are mounted the ?xed’ _
and movable contacts of the switch.
vIt is also an object to have the ?exible dia
phragm and the two mentioned discs welded
90 within the casing so as to constitute, opposite
said diaphragm, a ?uid-tight space connected,
by a conduit or the like, to the source of ?uid un
der pressure.
‘
A further object is to have a movable contact
25 of the switch constituted'by a ?exible blade se
cured, at one of its ends, to the disc having the
bent down edge or ?ange, and provided, at its
other end, with a contact piece, a ?nger, mount
ed on this blade, passing through both rigid
30 discs, preferably at their center, so as to be
capable of coming directly or indirectly in con
tact with the ?exible diaphragm ‘when the latter
becomes distorted under the in?uence of the
pressure of the ?uid, and the mentioned ?nger
35 may be adjustably mounted on said ?exible blade
carrying the movable contact of the switch.
It is also an object to have the ?xed contact
piece mounted on the disc having a bent down
edge and suitably electrically insulated there
‘9 from, while the‘v ?exible. blade may be mounted
_on the disc having a bent down edge. but elec
trically insulated therefrom, and to have the
rear portion of the casing closed by- a small plate
of insulating material through which the con
45 necting tongue or tongues pass which are respec
tively ‘connected to the fixed contact piece and
eventually to the ?exible blade carrying the
movable contact piece.
w
..
'
The present invention further relates to a
number of particular features which will ap
pear from the following description with refer
ence to the accompanying drawings, given by
way of example only, in which:
>
Fig. 1 is a side view of a. form of construction
of an improved apparatus according to the in
vention.
_
‘
Fig. -2 is a diametral section made according to
line 11-11 of Fig. 3.
Fig. 3 is an elevation of Fig. 1, the cover plate
being removed.
Fig. 4 is a partial section made according to
line IV—IV of Figs. 2 and 3.
_
Fig. 5 is a partial'section made according to
line V--V of Figs. 2 and 3.
Fig. 6 is a diametral section similar to Fig. 2,
showing a constructional modification of an im
proved apparatus according to the invention.
Fig. '7 is an elevation of Fig. 6, the cover plate
being removed.
15
'
Fig. 8 is a partial section made according to
line VIII-VIII of Figs. 6 and 7.
The improved'electric switch ‘with manometric
control according to the invention and illus
trated in Figs. 1 to 5, is composed of a metallic
casing I of substantially cylindrical shape and
terminating, on its rear face, in an axial cylin
drical screw threaded projection 2 serving to se
cure the apparatus on a suitable support (not
shown), as well as‘ to connect the said appara
tus to the pressure ?uid conduit. The casing is
provided, on its periphery, with a part 3 in the
shape of a nut having eight sides, or the like,
facilitating the ?tting up of said apparatus.
The cylindrical interior ‘of the casing I is so
made as to constitute a shoulder l on which
rests, once assembled, the resilient diaphragm 5
of the manometric box. This manometric box,
inserted substantially without play within the
casing l, is constituted by the ?exible diaphragm
5 vconnected at its periphery to a rigid frustum
shaped disc 6 having at its center a perforation
‘I. On this disc 6 bears the bent down edge 8 of
a metal disc 9 on which the contacts are mount
ed as will be described later on.
.
40
In order to ensure perfect ?uid-tightness be
tween the manometric box, disc 9 and casing i,
these various parts are peripherally welded to
gether as shownv at iii in Fig. 2. The ?uid-tight
chamber ll, formed between the diaphragm 5
and the rear wall of the casing I, communicates,
through an axial perforation l2, with the pres
sure ?uid piping, or the like, connected to the
screw-threaded projection 2 by any suitable
means.
~
50
0n the disc 9 and at its upper part is secured,
by means of a screw it or the like, the conduct
ing’flexible blade I! constituting the movable
contact of the switch. In order to avoid lateral
pivotal'movementof the ?exible blade IS, the 55
.~.>
, r
responding studs i5 formed or secured
A
In a convenient embodiment, these two stun.
.nal.
3711 order that the screw
or the
, should
insulated from the diaphragm 5,
en the latter comes in contact with
screw
. owing to a pressure exerted on this diaphragm,
between the screw i‘! andrthe diaphragm 5 is
i5 are obtained by upsetting said disc (Fig.
‘interposed an insulating member which may
slot or a socket 30, the end of which, opposite
screw l'i, has an insulating disc 3! prefer
passes through-these perforations so as to come ably beaded in said end of socket 30. This mem
her 35-3! is free in the axial direction and is
10 in contact with the diaphragm 5 when the lat”
guided in the central perforations 'l and
ter becomes distorted under the action of the ,
. iii respectively provided in discs 6 and 9.
pressure of the ?uid contained in.
space i
Qpposite the central perforations "i and it‘; re
sen
spectively
cured,
on provided
blade i3,ina the
?nger
discs
or 6rod
andi?9 which
In the embodiment illustrated
i
Such apparatus are utilizable in all cases in
which it is necessary to close an electric circuit
v
allow of adjusting the length at
ing ?nger ill, the latter consists
blade
dered l3.
rigid,But
by it
welding
is obvious
for that
instance,
this iinger
with i'i
when the pressure of the ?uid controlled by the
manonietric device falls below ‘a certain value,
and these contact apparatus are particularly
utilizable for indicating the lack of supply of
threaded rod screwed in a nut or the like
might be a simple rod riveted in a perioration
lubricating oil to an internal combustion en—
20 of the blade 13.
.
At the free end of blade 83 is secured a con~
gine; in this case, they are perfectly applicable
tact piece I8 .which normally bears upon a ?xed
contact piece is secured, by any suitable means,
on disc 9, but electrically insulated therefrom.
25 In the embodiment illustrated, this ?xed con
tact piece i9 is riveted on a conducting ?ange 20
having a suitable connecting tongue 2!. This
794,303 of November 19, 1934.
The present invention is not limited to the
forms of construction described above and illus
conducting ?ange 20 is secured on disc 9 by
means of two screws 22, members and washers
30 23, made of insulating material, ensuring elec»
tric insulation, on‘the- one hand, between the
?ange 20 and, on the other hand, between the
pended claims.
screws 22 and disc 9 (Fig. 5).
At its rear part, the casing I is closed by a disc
35 25, of insulating material, which is preferably
beaded in said casing I, a perforation being pro
vided in this disc for the passage of the connect
ing tongue 2 I.
,
I
It will be easily understood that when the pres
.
40’
sure of the ?uid, such as a liquid, contained in
the space H, exceeds a certain value, the dia
phragm 5 bulges‘or is distorted and comes into
contact with the ,?nger l3 so as to move it in
the direction of the arrow 24, thus breaking the
45 contact between contact pieces I8 and I 9. On
the other hand when this pressure falls below
the value chosen upon adjustment, the contacto
pieces I8 and I9 are in contact and the connec
the device described in the French Patent No.
trated, but it extends to all those utilizing the
features above set forth and adapted to produce
the desired result, within the scope of the ap
’
What I claim as vmy invention and desire to‘
secure by Letters Patent ls:
1. In a pressure operated switch, a casing hav
ing an open end and so shaped as to have near its
back wall a shoulder, a ?exible diaphragm hear
ing at its periphery on said shoulder for forming
a ?uid-tight chamber between said diaphragm
and said back wall of the casing, a rigid frus
tum-shaped- disc resting on the periphery of
said ?exible diaphragm and having a perfora
tion at its center, a cup-shaped member resting
by its bent down edge on said disc and also hav
40
ing at its center a. perforation located opposite
the perforation of sald|disc, the casing, dia—
phragm, disc and cup being connected together
in a ?uid-tight manner by welding, a ?exible
blade secured, by one’ of its ends, on said cup, 3X45
movable contact mounted at the free end of said
?exible blade, 8. stationary-contact mounted on
said cup so as to be electrically insulated there
from and with which said movable contact. nor
ting tongue 2| rigid with the ?ange 20 .is con~
l3 and mally engages, means passing through the per 50
~ forations of the disc and of the cup and placed
through the entire apparatus.
‘A
In the constructional modi?cation illustrated between said ?exible blade and said ?exible dla-.
50 nected to earth through the tongue
in Figs. 6 to 8, the same reference numbers des
ignate the same parts as in the form of construc
tion illustrated. in Figs. 1 to 5. This modi?ca
tion particularly differs from the form of con
struction shown in Figs. 1 to 5 by the fact that
the flexible blade I3 is electrically insulated from
the disc 9 which has a bent down edge or ?ange.
'05
phragm, so that when the latter becomes dis
torted, it moves the movable contact away from
the stationary contact by said means, a cover 55
?tted on the open end of said casing for enclos
ing the various members contained in the lat
ter.
-
2. In 'a pressure operated switch, a casing hav
For that purpose, said ?exible blade l3 is.se
cured, at its upper part, to a conducting ?ange
ing an open end and so shaped as to have near its
back wall a. shoulder, a threaded tubular projec
26, by means of a rivet 21, or the like.
tion provided on said back wall’ of the casing and
adapted to be connected to a. piping supplying
thev ?uid under pressure, a ?exible diaphragm
bearing at its periphery on said shoulder for form
ing a ?uid-tight chamber between said dia
phragm and said back wall of the casing, a rigid
frustum-shaped disc resting on the periphery of
said ?exible diaphragm and having a perforation
at its center, a cup-shaped member resting by its
bent down edge on said disc and also having at
its center a perforation located opposite the per
foration of said disc, the casing, diaphragm, disc
and cup being connected together in a ?uid-tight
In or
der to prevent said blade l3 from laterally pivot
’ing, thevrlvet 21 and the perforations 32 respec
tively provided in the ?ange 26 and blade l3,
and in which this rivet fits, are of prismatic shape.
The ?ange 26 is securedlon the disc 9 in the same
way as the ?ange 20 by means of two screws 33,
vmembers and washers 28, of insulating material,
70 ensuring electrical insulation, on the'one hand,
between the ?ange 26, and, on the other hand, be
tween the screws 33 and disc 9 -(Fig. 6). The
conducting ?ange'28 is rigid with a suitable, con
necting tongue 29 which passes through a per
75 foratlonprovlded in the disc 25 made of insulat
)
manner by welding, a ?exible metal blade se
8,117,918
cured, by one oi its ends,'on said cup in which
is electrically insulated therefrom, a movable con- -
3
perforations oi the disc and‘of the cup and in
betvqeen said ?exible diaphragm and the
end or said adjustable screw. sov that when said
tact mounted at the free end of said ?exible diaphragm distorts, said movable and stationary
blade. a stationary contact'mountcd on saidcup contacts are moved apart, a cover iitted on the
so as to‘ be electrically insulatedthereirom and open end of said casina ior enclosing the various~
with which said movable contact normally en ‘members contained in the latter. said cover hav
sases. a ?rst metallic connection member con
nected to said stationary contact. a second metal‘
ingt'oholesiorthepassaseofsaid?rstand
lic connection member connected to said ?exible second metallic connection members.
blade. an adjustable screw mounted on said ?ex
10
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