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Патент USA US2106594

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,2 Slfleeàzs-Sheet 2
Patented Jan. 25, 1938
Walter Dinnerville, Chicago, Ill., assigner to
Western Railroad Supply Company, Chicago,
Application January 28, 1937, Serial No. 122,764
5 Claims. (Cl. 200-6)
This invention relates to apparatus for con
trolling a waving crossing signal such as is used
at points where railroads and highways cross.
It is the object of rmy invention to provide im
5 proved apparatus for controlling such a crossing
signal, some forms of which are generally re
ferred to as magnetic auto flags.
My improvements in this control apparatus
will be discerned by one skilled in this art, after
10 a reading of the following specification, taken in
bearing II supports a shaft end I3, while the
bearing I2 supports a shaft end I4. On the shaft
end I3 is fastened, by a set screw I5, an arm
I 6 which extends vertically upward and termi
nates in a pair of adjacent cams or cam surfaces,
one of which, I1, is located on the extreme end
of the arm I6, while the other adjacent cam sur«
face I8 is on the upper inner face of the arm I6.
'I‘he function of these cams will be presently de
above the banner per se.
Mounted on the standard 1, in any satisfactory
manner as by screws I9, is a plate 20, preferably
of good insulating material. Mounted on the
upper end of the plate 20, as by screws 2l, is
a T-shaped terminal composed of two parts-a
horizontal member 22 and a vertical member 23
Figure 2 is an elevational view, approximately
full-size, ol’ part of the control apparatus.
which is preferably set into a recess in the mem»
ber 22 in any satisfactory manner as by a screw
Figure 3 is a side view, looking from left to
right, of the upper portion of the unit selector
parts shown in Figure 2.
'I'he portion 23 is slotted to receive a flexible fi ~
spring strip 24 which is mounted in edgewise po 20
connection with the annexed drawings, wherein:
Figure 1 is an elevational view, on a reduced
scale, of the top part of a standard carrying a
magnetic auto flag or waving banner light, the
apparatus being mounted
Figure 4 is a perspective view of the cam de
vice shown in Figure 2.
Figure 5 is a part-sectional and part-eleva
tional view through the control apparatus@
Figure 6 is a part-elevational and part-sec~
tional view at the end of the control apparatus
opposite that of Figure 2.
Figure 7 is a diagram of a typical circuit used
in the control apparatus.
In the various views, wherein like numbers
refer to corresponding parts, I illustrates the
upper end of a pipe standard usually used for
supporting the entire signal mechanism. Car~
Q3 Cal ried on the upper part of the standard I is a
frame-work 2 usually constructed of channel
irons, within the conñnes of which the cables
coming up through the standard I, and protected
by metallic conduit, may be carried up to the
40 control box or mechanism case 3 mounted on
top of the frame-work 2. Above the mechanism
case 3, and which may be mounted on the cover
thereof, is an audible signal or bell 4. It may
be noted in passing that, attached to the stand
ard I, is a cross arm composed of two cross mem
going through the member 29 into the portion 23.
sition in the member 23. The spring 24 carries
at its movable or shiftable end, a block 25 of
suitable metal which is held to the spring 24 by
means of a slot in which the end of the spring
24 is positioned, and a transverse screw 2E.
The block 25 has a hollow portion carrying a
metallic plunger 21, preferably of some non-cor~
rosive material, such as Monel metal. The
plunger 21 has a notch 28 therein, within the
confines of which a pin 29 is positioned. The pin 30
29 passes through the block 25 and acts as a
stop for the plunger 21 which is normally urged
outwardly from the block by the spring 3i). The
end of the plunger 21 is provided with a tip ‘
3l of good wearing material, such as micarta
or bakelite, adapted to ride on the surface of the
cam I1.
The block 25 carries contacts 32 and 33 oppo~
sitely disposed. The contact 32 is adapted to co 40
operate with a contact 34 carried by a stiff ter
minal member 35 which is held to the plate 2l!
by screws 36, one of which is equipped with lock
nuts 31 to hold a circuit wire in engagement
therewith. The member 35 is made stiff so that 45
bers 5 and 6 on which the words “Railroad
Crossing”, in any suitable form, may be applied.
it will positively hold any adjusted position
Within the mechanism case or housing 3, are
given it by bending.
Thus there are no screw
two spaced uprights orstandards 1 and 8 fas-
contacts to become loose or get out of adjust
ment. The contact 33 is adapted to cooperate
tened to a base portion 9 in any satisfactory
`manner as by bolts I0.
Carried between the base portion 9 and the
lower portions of the standards 1 and 8, are
member 39 on the plate 20 carried by the screws
36, similar to those Which fasten the terminal
35 to the plate 20. The nuts 31 are carried by
bearings Il and I2, preferably of the anti-fric
nection therewith. The member 39 being stiff, 55
Ui Ol tion type, ball bearings being indicated.
with a contact 38 carried on a stiff terminal
one of the screws to hold a. circuit wire in con
like the member 35, will hold its adjusted posi
tion in a similar manner and for the same pur
Fastened to the plate 2t, as by screws 40 and
4i, the latter of which acts as a terminal for con
necting a circuit wire thereto, is a resilient strip
«l2 which extends beyond the end of the plate 20
and carries a contact 43 adapted to cooperate
with the contact 44 carried on a spring strip 45
10 which extends longitudinally of the plate, below
and at right angles to the plane of the spring strip
24, and is held in position by and between the
parts 22 and 23. The free end of the spring
strip 45 carries a bumper 46 of any satisfactory
15 material, such as ñber or bakelite, held thereto
in any satisfactory manner as by screw 4l and
an upturned end 48 of the spring 45.
The shaft end Id carries a sector 4S having an
arcuate surface 5l] adapted to be engaged by a
20 brake shoe 5I controlled by a magnet 52 and
spring 53 in a manner to be hereinafter described
in connection with the operation of the control
apparatus, but since the brake mechanism per se
forms no part of my present invention, further
description does not seem to be necessary.
Between the standards ‘l and 8, is mounted for
rotation with the shaft ends I3 and I4, a support
from which extend a pair of electro
magnetic core members carrying coils or wind
30 ings 55 and 55, having their respective pole shoes
and 58 adapted to cooperate with the pole shoe
59 carried by an electro-magnet 60.
Extending downwardly through the housing of
the control member 3, is a tubular member 6I
35 supporting a banner, the major part of which is
numbered 52,
within which are located lamps
which will be described in the operation of the ap
paratus. To the major part 62 is attached an
auxiliary part 83 carrying a reserve lamp 80.
40 The major part 52 of the banner is provided with
lens 63 on opposite sides so that the banner can
be seen from both directions. Likewise, the aux
iliary part 83 carries lens 84 for the same purpose.
The bottom G4 of the housing carries oppositely
either direction, one of the relays, either 'I2 or
13, will be shunted by the wheels of the train,
so that its armature is allowed to close the back
contact, which will immediately apply the bat
tery to the contacts on the terminal strip 14 and
allow current to pass through different circuits
in the control apparatus.
One of these circuits is through the brake coils
52, causing the shoe 5I to be released from the
sector 50 against the tension of the spring 53.
Another circuit can be readily traced through
the relay 'I5 to a connecting stud -I6 carried by
a terminal strip 'I1 in the banner 62; and through
a lamp ‘I8 to a terminal ‘I9 back to the negative
side of the current supply which is indicated as 15
a battery B. This will light the lamp 'I8 in the
A further circuit will be traced from the posi
tive side of the battery through the terminal 4I,
onto the strip 42, contacts 43 and 44, and through
the strip 45 to the block 22 and connecting stud
2| through the electro-magnet 60 back to the
negative side of the battery B. Since current
has been applied to the terminal block 22 through
the strip 45, as just described, current will be `
applied to the spring strip 24 and from it to the
shiftable block 25 and through one set of con
tacts 32-34 or 33--38, depending on which set
of contacts is closed at the time.
Assuming that contacts 32 and 34 are closed as
indicated in Figures 2 and 7, current will be con
veyed through the electro-magnet 56, and the
action will be such that the pole shoes 53 and 59
will act to attract each other, but since the
electro-magnet 60 is stationary, the action will ~"
be to pull the electro-magnet 56 so that the pole
shoe 58 passes under the pole shoe 59, swinging
the banner to one of the dotted positions indi
cated in Figure l; for example, position 19.
Under normal operation, as the arm I6 is ro
tated, the cam surface I 8 will leave the bumper
46 and the contacts 43 and 44 are opened, but
the oscillatable mechanism described continues
in its pendulum-like movement, but not enough
50 one end of which terminates in an enlarged por
tion 69 acting as a bumper. On the opposite
to cause the arm carrying the banner to strike
one of the bumpers 69. On the return movement
of the banner, the cam surface I1 will then act
on and through the bumper 3l to move or shift
the block 25 to close the contacts 33 and 38,
which is done in each case before the contacts
43 and 44 are closed. The electro-magnet 55
end of the plunger G3 is a transverse pin 10 for
preventing the plunger 68 from moving down
wardly out of the member 65. These last-men
will then be energized and the banner pulled in
the opposite direction, and the cycles will be
repeated, and the banner caused to swing in
tioned devices act as stops, under certain condi
tions of operation, for the tubular member 6I as
track relays 'I2 and ‘I3 convey current to the
45 disposed hollow members 65 having threaded
shoulder portions going through the housing
member 54- and held in place by nuts 66. Within
the hollow portion of each member 55, is a spring
Gl acting against the shoulder of a plunger 68,
a manner similar to a pendulum as long as the ,
the same moves from side to side in the manner
terminals on the terminal strip 14.
to be hereinafter explained.
excessive voltage is applied to the coils operating
the banner, the impulses applied to the tubular
A spring-mounted
catch arm 'l i, indicated in Figures l and 5, is used
60 for holding a cover plate over the control box 3.
Coming new to the operation of the control ap
paratus and referring to Figure 7, it may be said
that the normal position of the banner 62 is the
position indicated in the full lines in Figure l,
65 and the control apparatus is in about the posi
tion indicated in Figures 5, S and '7, in which
position the contacts 43 and 44 are closed by the
cam surface i3 due to the cam surface I8 being
in engagement with the brunper 46. At the same
70 time, the other cam surface Il' is in engagement
with the bumper 3i and the action will be such
that one set of contacts, either 32 and 34, or 33
and 38, will be closed, but the current supply cir
cuit will be opened at the relays ‘I2 and 13. When,
however, a train approaches the crossing from
In case an
member 6I may cause it to strike the bumpers
B9, thereby preventing shocks too severe on the
banner and the lamps carried therein. A con
denser C is bridged across the contacts 43 and
44 to absorb the spark which may be caused by
the breaking of these contacts.
It may be noted that I have shown in Figure 7,
a second relay l5' which is in parallel with the
relay l5, and also a second lamp ‘I8’ which is in
parallel with the lamp 18, the relays being in
series with their respective lamps. This duplicate
arrangement of relay and lamp is merely to give
an additional factor' of safety to the operation of
the system. In addition, a reserve lamp 80 is used
in the auxiliary part 83 of the banner so that if
one of the lamps, for example 18, should become '
broken or burned out, or otherwise disabled, the » spring member and having a bumper on its free
end to be engaged by a second cam and also carry
relay 15 will not be energized, but its contact 8|
will be closed through a resistance B2 which is the ing a contact, the planes of both said springs be
equivalent of the winding in the relay 15, thereby ing at right angles to each other, a contact mem
causing the reserve lamp 8B of the banner to be ber on the plate mounted behind both of said
spring members and having a contact to cooper
Another circuit which is also established by the ate with the contact on said second mentioned
initial operation of one of the relays 12 andy 13, is
that through an alarm bell 4. Usually the relays
3. As part of a control apparatus for a waving
crossing signal, a unitary structure comprising a 10
plate of insulating material, a metallic terminal
12 and 13 are interlocked on the operation of one
of them so that the back contact of the other re
lay is mechanically locked open. This means that
when the train, crosses the insulated rail joints at
the highway, the first relay is actuated, opening
mounted on one end of the plate, a flat spring
member carried by the terminal in edgewise posi
tion, a block mounted on the free end of said
its back contact, but the back contact of the sec
ond relay cannot be made even though the train
is now in the second circuit or block, thus de
spring and having contacts on two of its opposite 15
sides electrically connected to said metallic ter
minal, a plunger yieldingly carried in the block
energizing the winding of the second relay because
of this mechanical locking. The signal is turned
and having an end extending so as to be engaged
off when the train crosses the highway, and when
the train leaves the second rail circ-uit, the arma
ture of the second relay picks up, and the locking
device is restored to normal. The method of
by a cam, rigid terminals carried by the plate on
opposite sides of the block and having ñxed con 20
tacts positioned to cooperate with the contacts
carried by said block, a second ñat spring member
connected to said metallic terminal and extending
starting and stopping the signal, however, is not
below the ñrst mentioned ñat spring and beyond
an important matter in the present case as the
said block and having a bumper on its free end
to be engaged by a second cam and also having a
contact, a contact member mounted on the plate
behind both of said spring members and having a
signal may be operated through a switch manipu
lated by a watchman in a tower, or by relays con
nected in any manner required by the train oper
ations on single or multiple track railroads.
Because of the fact that certain parts of the
control apparatus shown` and described herein are
old, the claims will only be directed to the new
and improved features which~ provide more eili
cient and positive operation.
Having thus described my invention, what I
claim is:
1. As part of a control apparatus for a waving
crossing signal, a mounting carrying in insulating
relationship a pair of relatively ñxed contacts, a
40 laterally shiftable member positioned between
said contacts and carrying contacts to cooperate
with the relatively fixed contacts to control cir
cuits through electro-magnets associated with
said signal, a yieldingly mounted plunger carried
in the end of said shiftable member and having
a wearing end thereof extending beyond said
member so as to be engaged by a cam surface on a
part of a signal mechanism, a member carrying
a contact behind said shiftable member, a spring
member extending between the last mentioned
member and the shiftable member and carrying a
contact and having a bumper adapted to be en
gaged by another cam surface on a part of the
signal mechanism to bring the last two mentioned
contacts into engagement for the purpose de
2. As part of a control apparatus for a waving
crossing signal, a unitary structure comprising a
plate of insulating material, a metallic terminal
60 mounted on one end of the plate, a ñat spring
member carried by the terminal in edgewise posi
tion, a metallic block mounted on the free end of
said spring, a plunger yieldingly carried by said
block and having an end extending away from the
block to be engaged by a cam, contacts carried by
said block on opposite sides thereof, a relatively
fixed contact carried by the plate on each side of
said block for cooperation with its` contacts, a
second flat spring mounted on said metallic ter
minal and extending below the first mentioned
contact to cooperate with the contact on said sec
ond mentioned spring.
4. As part of a control apparatus for a Waving
crossing signal, a unitary structure comprising a
plate of insulating material, a metallic terminal
mounted at one end of the plate, a pair of flat
springs mounted on said terminal in spaced rela- ;
tion and extending longitudinally of the plate,
one of said springs carrying a bumper and a single
contact while the other carries at its free end a
pair of oppositely disposed contacts and a. yield
ingly mounted bumper, both said bumpers adapt- ‘i
ed to be engaged by the same member having in
dependent cam surfaces for engaging said respec
tive bumpers, a pair of rigidly mounted contacts
carried on the plate in position to cooperate with
contact '
mounted directly on the plate behind both said
spring members for cooperation with the said
single contact.
5. A control unit for the purpose described in
cluding a plate preferably of insulating material,
three resilient spring type members mounted on
the plate in spaced relation, the one closest to
the plate having means for making electrical con
nection thereto and a contact of suitable mate
rial, the middle spring having a contact to co
operate with the iirst mentioned contact and also
a bumper adapted to be engaged by a. cam to close
said contacts, the outer spring member having a
block carrying contacts on two opposed sides and
at least in electrical engagement with the spring (i0
member, a plunger yieldingly held in said block
and having a bumper extending to be engaged by
a cam to shift said block sidewise, a pair of rigid
ly mounted circuit contacts on the plate, one on
each side oi said block to be alternately engaged
by the contacts thereon, the middle and outer
springs being at least electrically connected to
gether for the purpose described with means for
making circuit connection thereto.
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