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Патент USA US2119481

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May 31, 1938.
J. F. FRESE
ELECTRIC VALVE OPERATING MEANS
Filed Feb. 24, 1936
2,119,481
Patented May 31, 1938
2,119,481
UNITED STATES PATENT OFFICE
2,119,481
ELECTRIC VALVE OPERATING MEANS
Joseph F. Frese, Baltimore, Md., assignor to
Monitor Controller Company, Baltimore, Md.,
a corporation of Maryland
Application February 24, 1936, Serial No. 65,510
2 Claims. (Cl. 175—320)
In railway cars equipped with generators and
shown in the drawing, if the switch lever 12 is
batteries for supplying current to lamps and to moved into engagement with the contact 9, a cir
motors for operating air cooling apparatus, a
cuit will be made up to the solenoid b as follows:
switchboard is usually placed at one end of the From the supply wire L through conductor l3,
car. In cold weather, the air in the car is kept at
a temperature comfortable to the passengers by switch arm 12, contact 9, conductor 8, contacts 5
4, 3 and 5, and conductor l5 to coil of solenoid b.
steam heat supplied through pipes from the If
the lever is in the dotted line position and the
locomotive and controlled by valves in the car, switch arm I2 is moved into engagement with
and even in mild weather these valves have to be
contact H, a circuit will be made up to the coil
10. operated at times to maintain the proper tempeiu
of solenoid c as follows: From supply wire L
" ature in the car. It is the purpose of this inven
1.5'
tion to provide means for controlling the valves
electrically from a distant point, as by a switch
which may be conveniently arranged on the
switchboard at one end of the car. The invention
comprises two electromagnets for each valve,
one magnet for opening the valve and the other
for closing it. As the valves some time stick,
especially after long disuse, I provide means
whereby, when a magnet is energized to operate
the valve, if the valve moves immediately, the cir~
cuit through the magnet coil will be at once cut
off; but if the valve sticks, the current will be
applied to the magnet coil for a predetermined
and will then be automatically cut off, thus
25, time
preventing overheating of the coil, and when the
current is cut off, a signal, preferably a lamp, will
be activated to indicate to the operator that the
valve has stuck and requires attention.
Referring to the drawing, in which the inven
30
tion is illustrated diagrammatically, L and L’
indicate supply wires lea-ding from a suitable cur
rent source, 0 indicates a valve casing contain
35
ing the valve which is to be controlled, b indicates
an electro-magnet of the solenoid type for open~
ing the valve and c indicates a similar magnet
for closing the valve. For the purpose of illus
tration, the solenoids are shown on opposite sides
of a lever I which is secured to the valve stem 2,
40 and the cores of the solenoids are pivotally con
nected to the lever. The lever carries an insu~
lated contact member 3 which engages contacts
4 and 5 when the valve is closed, to make up a
circuit to the solenoid b, and the member 3 is
45 adapted to engage contacts 6 and 1 when the
valve is open, to make up a circuit to the solenoid
0. Contact 4 is connected by conductor 8 to sta
tionary contact 9 of a manually operable switch
it, and contact 6 is connected by the conductor ID
50 to stationary contact I I of said switch. A switch
arm I2 is movable into and out of engagement
with either of said contacts 9 and II. This arm
is connected by conductor l3 to the side L of the
supply circuit.
55
When the valve lever is in the full-line position
1O
through conductor I3, arm 12, contact ll, con
ductor 10, contacts 6, 3 and 'l and conductor 16
to coil of solenoid o. The coil of solenoid b is
connected by conductor ll to a conductor Iii
which is also connected to the coil of solenoid 0, 15
so that the circuits of both solenoids are con
tinued through conductor I8 to coil I9 of a re
tarded relay e, thence through conductor 20 to a
coil 2| of a relay f, thence by conductor 22 to the
normally closed relay switch 23, and thence by
conductor 24 to supply wire L’. The relay f has
a high resistance winding 25 in series with coil
2|, but permanently connected to conductor 24
and the supply wire L’, instead of being con
nected through the switch 23. Normally the high
resistance coil is shunted through conductor 22
and switch 23. A conductor 26 extends from coil
2| to conductor 2'! in which is included a sig
naling device, preferably a lamp 28, and con
ductor 2'! is connected to conductor 24 and thence
to supply wire L. The signal circuit just traced is
thus in series with the low resistance coil 2| and
in shunt to the high resistance coil 25 and switch
23. The retarded relay e controls a shunt around
the coils of relay 1’ as follows: From conductor
20, through conductor 29 and a switch 30 of relay
9 to conductor 3 l, and thence through conductors
26, 22, switch 23, and conductor 24 to supply wire
L’.
The relay e has a movable contact member
32 which normally engages stationary contacts
33 and 34, and a dash-pot 35 retards the lip
ward movement of the member 32. The coils of
the solenoids b and c and the coils l9 and 2| of
the relays are of low resistance.
The operation is as follows: if the valve lever
is in the full line position shown in the drawing,
corresponding to the closed position of the valve,
and it is desired to open the valve, the switch
lever I2 will be moved from the “off” position into
engagement with the contact 9. If the valve does
not stick, it will be immediately opened by the
attraction of the solenoid b which will be ener
gized by current flowing from supply wire L
through switch d and conductors B and I5 to coil
of solenoid b, thence through conductors I‘! and
2
2,119,481
l8 and coil 59 of solenoid e to conductor 20, thence
through conductor 29, switch 30, conductors 3|,
26 and 22, switch 23 and conductor 24 to supply
wire L’. In moving to open the valve, the con
tact member 3 on the lever will open the circuit to
the magnet b and make up the circuit to the mag
net 0 at the contacts 6 and ‘i.
If the valve sticks and does not immediately
open, current in full strength will be applied to
the coil of solenoid b for a short time, and then
switch 23, breaking the shunt around the high
resistance coil 25 and the signal circuit 26, 21.
The switch 23 will be kept open by current flow
ing through the high resistance coil 25, and the
will be automatically cut off and the signal lamp
will be lighted to indicate that the valve has
stuck and needs attention. Thus, if the solenoid
I) does not open the valve immediately when
15 current is admitted to its coil, the circuit through
the coil will be maintained at the contacts 4 and
5 and current at full strength will ?ow through
the coil until the valve opens or the retarded
relay e opens the switch 39. The opening 'of
20 this switch will open the shunt circuit around
the low resistance coil 2i of relay 3‘, and current
at full strength will then flow from conductor
2B through said coil to conductor 22, thence
through switch 23 and conductor 24 to supply
25 wire L’. Relay f will then open switch 23. This
will open the shunt around the high resistance
coil 25 of relay 1‘ and the current ?owing through
coil 25 will cause the relay to hold the switch 23
open. The opening of this switch also opens
30 a shunt around the lamp circuit 26, 21, and the
lamp lights, indicating to the operator that the
valve has not opened and requires attention.
When the switch 23 opens, the resistance of the
lamp and the resistance of the coil 25 of relay f,
35 in multiple, are left in series with coil 2| of
relay J‘, coil E9 of relay 6 and the coil of solenoid
b. The current flowing in the coil of relay 6 is
thus reduced and the relay closes the switch 39,
but without effect, as the switch 23 of relay 7‘
is held open by the current ?owing in its high
resistance coil. The current ?owing in the coil
of solenoid b is also reduced so that no one of
the coils can be injured by excessive current.
The signal will be energized until the valve is
manually moved, which will cause the circuit
45. of the coil of solenoid b and the coils of the relays
to be broken, or until the circuit is otherwise
interrupted, as by moving the arm of switch it to
open position. When the circuit is broken, the
relay f permits its switch 23 to close and the
50 relays are then set for the next operation.
When the valve is open, the valve lever is in
55
the dotted line position and the circuit for the
coil of solenoid c is made up at the contacts 6 and
‘I to the switch d. When it is desired to close
the valve, the arm of switch d is moved into
engagement with contact I l and the current then
flows from supply wire L through said switch and
conductors l0 and Hi to the coil oi‘ relay 0 and
thence through conductor l8 and the relay cir
6.0. cuits previously traced, which are common to the
coils of both solenoids b and c, to the supply
wire L’. If the valve does not stick, the solenoid‘
0 will immediately move it to the closed position
and the valve lever will open the circuit to the
65, solenoid c at the contacts 6 and ,l and make up
the circuit to the solenoid b at the contacts 4, 5.
If the valve does not move from the open posi
tion immediately, the current at full strength
will be applied for a limited time to the coil of
70 solenoid c, and at the expiration of that time,
if the valve has not moved, the relay e will open
the switch 30, breaking the shunt around coil 2|
of relay f, and the latter relay will open the
current in coil of relay 6 will be reduced by reason
of the resistance introduced into its circuit, and
this relay will close, but without effect. Its coil
and the coil of solenoid 0 will be protected by the
resistance introduced in series with them, so that
no injury can result to the coils. The lamp will
remain lighted to indicate that the valve has
stuck until the circuit through the solenoid is
broken by manual movement of the valve or by
opening of the switch d.
15
What I claim is:
1. The combination with a current source, a
device movable back and forth between two posi
tions, two electromagnets having their armatures
operatively connected to said device, one of said
magnets, when energized, adapted to move said
device in one direction and the other magnet,
when energized, adapted to move said device in
the opposite direction, a circuit for the coils of
said magnets including a switch operable by each
magnet to open the circuit to its own coil and to 25
make up the circuit to the coil of the other mag
net, and a manually controlled switch for con
necting the coil of the magnet whose circuit is
so made up to the current source, of means for
automatically reducing the current ?ow in the 30
magnet coil so connected if the magnet fails to
move the device comprising a relay having a low
resistance operating coil and a normally closed
switch in the magnet circuit and having a high
resistance holding coil in shunt to the relay 85
switch, said relay, when its operating coil is ener
gized, adapted to open the» latter switch, and a
retarded relay, having a coil in the magnet cir
cuit, controlling the ?rst-mentioned relay to
cause the latter to open. the magnet circuit in a 40
predetermined time after the closure of said latter
circuit by said manually controlled switch provid
ing the energized magnet fails to move said de
vice and open its own circuit.
2. The combination with a current source, a 45
device movable back and forth between two posi
tions, two electromagnets having their arma
tures operatively connected to said device, one
of said magnets, when energized, adapted to move
said device in one direction and the other mag
net, when energized, adapted to move said de
50
vice in the opposite direction, a circuit for the
coils of said magnets including a switch operable
by each magnet to open the circuit to its own
coil and to make up the circuit to the coil of the
other magnet, and a manually controlled switch
for connecting the coil of the magnet whose
circuit is so made up to the current source, of
means for automatically reducing the current
?ow in the magnet coil so connected if the mag-v (S0
net fails to move the device comprising a relay
having a low resistance operating coil and a
normally closed switch in the magnet circuit and
having a high resistance holding coil in shunt to
the relay switch, said relay, when its operating
coil is energized, adapted to open the latter
switch, a normally closed circuit in shunt to said
operating coil, and a retarded relay, having a coil
in said magnet circuit, adapted to open said shunt
circuit in a predetermined time after the closure
of said magnet circuit by said manually controlled 70
switch, providing the energized magnet fails to
move said device and open its own circuit.
JOSEPH F. FRESE.
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