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wg 1946~ .
2,412,382
W. C. ANDERSON ETAL
ELECTRIC TROLLEY CONDUCTOR DUCT AND COLLECTOR
Filed Àpril 17, 1945
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Dec. 10, 1946.
W. C. ANDERSON Em,
2,412,382
ELECTRIC TROLLEY CONDUCTOR DUCT AND COLLECTOR
Filed April 1'7, 1945
2 Sheets-Sheet 2
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ENTORS
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2,412,382y
Patented Dec. ÍÜ, 1946
UNITED STATES PATENT OFFICE
2,412,382
ELECTRIC TROLLEY CONDUCTOR DUCT
AND COLLECTOR
William C. Anderson, Burlington, and George J.
Naber, Erlanger, Ky., asslgnors to The Trum
bull Electric Manufacturing Company, Plain
ville, Conn., a corporation of Connecticut
Application April 17, 1945, Serial No. 588,876
15 Claims. (Cl. 191-23)
lV
2 .
may be secured together if desired, in any suitable
Our invention relates particularly to bus duct
way, as for instance by a screw or bolt I3.
systems. 'I'he main object is to provide appara
The flanges of the wider duct member prefer
ably terminate in rolled or curled edges Il which
' tus which is electrically and mechanically safe
and reliable for use with a trolley collector type
system.
` greatly reinforce the duct member and also af
ford convenient means for,A the attachment of
‘
Another object is to provide a simple, compact,
attractive, light and inexpensive but strong ap
In carrying out these objects we form the duct
suitable hangers such as I8 (Fig. 4). This form
of hanger is formed of two substantially Z-shaped
parts, eachy having an upstanding iiange I9 and
tween the duct members and are preferably of
terlocked in the adjacent curled edge I'I >of the
paratus.
of two channel or trough-like members one of 10 these flanges are connected by one or more bolts
20 and constitute means for connection of a
which is wider than the other and has its flanges
hanger rod, bolt or other device (not shown).
overlapping the other one and lying outside of its
Each hanger part has a ñange 2I which embraces
iianges so as to leave two narrow slots between
one of the ilanges II and terminates in an out
the ñanges of the respective members.
wardly
turned hook-like flange 22 which is in
15
The bus bars are supported in the space be
'
duct member 9.
In Fig. 6 is shown a device for uniting the ends
of successive sections of the casing and which
channel-like cross section.
The wider duct member constitutes the main
support and preferably has its edges rolled or
curled so as to form grooves to accommodate 20 may also serve to act as a hanger. This consists
hangers and splicing members.
The narrower
duct- member constitutes the trolley track mem- _ -
of a plate 25 and depending plates 26. Each of
the latter vhas a flange 21 at one end interlocked
with a hook-like flange 28 of the top plate 25 and
ber and may have hinged or otherwise removable
secured to the top plate by one or more fastening
or drop-out parts to provide for direct access to
the bus bars and for insertion and removal of .the 25 devices such as a bolt or screw 29. '_I‘he other
end of the plate 26 terminates in a; hook-like
trolley collector.
flangev 30 which interlocks with the rolled or
Fig. 1 is a side or edge view on a small scale
curled edge I1 of the duct member 9.
of a portion of a bus bar duct system embodying
When'the plate 25 overlies the ends of adjacent
' one- form of our invention, parts being Vbroken
away and shown in section.
30 duct sections, the bolts 2'9 serve to clamp the
l
plate to the duct sections.
Figs. 2 and 3 are views of the opposite faces of
Each end 0f a duct
the parts shown in Fig. 1, parts -being broken
, section may be cut out- at 3| to facilitate access
away.
Fig. 4 is a cross sectional view of the duct and
the duct are secured to the wider or cover sec
to the bus~ bars. The lower or track sections cf
bus bars on a larger scale and showing one form 35 tions by screws orbolts or preferably rivets ~32
of hanger and one form of trolley or current col - ¿ which also‘nhold the-insulating blocks I5 in place.
"At one or more places along the duct We pro
lector.
-
‘
'
'
vide a removable channel-shaped lmember or
Fig. 5 is a plan View of the form of trolley
drop-out 33 which- is hinged at 34 so that it can`
.shown in -Fig. 4, parts being broken away.
Fig. >6 is a cross sectional view of the duct and 40 be swung >from the planef-of the narrow'y -duct
member II). In the end of the drop-out 33 op
bus bar and showing the splicing members for
posite the hinge is supported a lbolt--like member
connecting adjacent sections and bus bars.
35which slides inthe channel-»like section of the
Fig. 7 is a side view ‘of one form of trolley col
drop out> 3'3. A clamp screw 36 extends and slides
' VThe main body or casing of the duct syst-em is 45 .through a slot3‘l in member 33 and hasa screw
- .' lector suitable _for use with our system.
‘
.Y ' made up' of two channel-like members 9 and -‘IIJ‘
’ 'seat in the bolt 35." 'I'he end of the trap member
having spaced'ñanges II ~and~ I2 Vwhich overlap
33 has the ends of its ñanges 38 bevelled off to
but leave slots I3, i3 on opposite sides of the nar
- overlap and engage the bevelled ends'of the ad- ~
The bus bars I4, I4 are also of channel form
jacent duct member to prevent the trap member
from engaging the bus bar. The drop-out or trap
with flanges supported at intervals in insulating
door may be hinged to a duct section or to an end
blocks I5. Adjacent ends of bus bars are con
nected by splice pieces I4’. Each block is prefer- A
ably divided transversely so as to facilitate ati
piece 39 as shown in Fig. 2.
rower duct member.
`
'
The trolley collector may be formed in var
ious ways. For instance, it may have a box 40
tachment and removal of the bus bars. The parts 55 (Fig. 4) with conventional plug-in sockets shown
.
2,412,8824
3
4
:it 40’ for the branch conductors. In any event
it has a pair of side arms 4l secured to the box
Where the drop-out is omitted of course an
ordinary length of the channel-like member will
and adapted to extend through the slots I3, I3.
be used.
These arms may be a part of a channel-like mem
ber which is scoured to the box or a part of or
secured to the box in any suitable manner.
Guide rollers or Awheels 42 are carried by these I
arms andride' on‘the flanges I2 which serve as
-
y
The bus bar insulating supports also serve to
space the parts 9 and I0 of the casingr apart and
hold them in proper relation to each other and
to thebus bars.
"
i
¿
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>
"
"
It will bevunderstood that the duct may be made
guide tracks or rails. The parts are so propor
up in standard lengths.
f
tioned and spaced that the wheels are guarded .10,
We claim:
by the wall of the duct member 9 andrcan not
l. In a bus duct system, a duct comprising a
jump the tracks, and the trolley may operate with
channel-like outer duct member and a narrower
the duct mounted in any position. Contactsv 43
innerfduct member secured thereto, said members
are carried by the arms 4I and-are spring pressed` » having flanges Whichextend in opposite directions
against the bus bars. These arms provide'pro
tected ducts 44 for the conductors from the branch
box 40 to the contacts, in the insulating housings
and >overlap but are spaced apart to leave trolley
vslots along the ,opposite flanges of the narrower
duct member, and bus bars supported between
4
said members and accessible through the respec
The collector is mounted on the rails by span
tive slots, the flanges ofthe narrower duct mem
ning the arms 4I across an uncovered portion of 20 ber yconstituting tracks for supportingja trolley
the bus bars at any entrance point and sliding
the box along said bus bars until the wheels en
`2. Ina bus duct system, a duct. comprising a
gagewiththe rails in the covered portion of the
channel-like upper duct member and a narrower
duct. The box may have a loosely hinged handle
lower duct member secured thereto, said mem
40".
collector.
or bail 45.
`
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»
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25 bers having flanges which extend in opposite-di
Fig. 7 shows another form of branch box 46
rections and overlap but are spaced apart .to leave
trolley slots along the oppositellanges of the nar
rower duct member, insulators connecting said
duct construction is very simple and easily in
duct members and adapted to support bus bars
stalled and inspected. It requires but few easily 30 within and insulated from said duct, the flanges
with a cable connection 41.
It will be seen from the foregoing that the
made parts for its main construction and but few
of the narrower duct member constituting tracks
additional parts for the drop-out or trolley con
for supporting a trolley collector.
i ,
»v
nection. The channel-like shape has a maximum
3. In a bus duct system, a duct comprising a
strength for a given weight and size and is easily
channel-like upper duct member and a narrower
made. The trolley itself is also very simple and 35 lower duct member secured thereto, said mem
smoothly supported. The overlapping of the top
bers having flanges extending in opposite direc
tions and spaced apart to leave trolley slots along
and bottom parts of the duct or casing prevents
accidental grounding of a bus bar to the casing
the opposite flanges of the narrower duct member, `
for instance by the insertion of a screw driver
insulators connected to the upper duct member,
40 bus bars supported in said insulators and acces
or other metal object through the side-slots.
The rolled or curled edges of the top part of
the duct further strengthen the assembly and
eliminate exposed sharp edges and serves as a
very convenient medium for attaching hangers,
tap boxes and other auxiliary equipment at any
point along the run. The turned up edges of
the lower member of the duct not only strength
ens the assembly but being located within the
45
sible through the respective slots, means for de
tachably securing said lower duct member to said
insulators, the flanges of the narrower duct mem
ber constituting .tracks for supporting a trolley
collector.
4. In a bus duct system, a duct comprising a
channel-like upper duct member and a narrower
lower duct member secured thereto, said mem
bers having flanges which extend in opposite di
also serve as guiding rails or tracks for the trol 50 rections and overlap but are spaced apart to leave
trolley slots along the opposite flanges of the nar
ley collector wheels.
The top of the casing is spaced from the upper
rower duct member, insulators connected to the
upper duct member, bus bars supported by said
edges of the rails just suñlcient to furnish clear
insulatorsand accessible through the respective
, ance for the trolley wheels but prevent the Wheels
from jumping the rails. Although the duct is 55 slots, the flanges of the narrower duct member
constituting tracks for supporting a trolley co1
usually mounted horizontally the present con
lector and means for supporting the lower duct
struction permits operation of the trolley regard
member from the upper duct member.
less of the position of the casing or duct.
5. In a bus duct system, a flanged main duct
By locating the slots for the trolley along the
sides of the bus bars the depth of the enclosure 60 member and a narrower ñanged duct member
mounted within the main duct member, said
is keptv at a minimum. By running the two slots
members having flanges extending in opposite di
with a guide rail adjacent each slot at substan
rections and with a slot left between each flange
tially the corners of the casing we stabilize the
of the main duct member and a flange of the nar
collector by giving it as Wide a base asvpossible
65 rower duct member, bus bars supported between
for support.
the `duct members and a trolley collector having
The hinged collector drop-out piece permits
arms extending through said slots and carrying
opening of the casing for insertion of a collector
wheels supported on the flanges of the narrower
or for inspection of bus bar connections, The
duct member and contacts slidable against the re
hinged collector drop-out pieces also serve to join
70 spective bus bars.
_
sections of the enclosure.
6. In a bus duct system, aV flanged cover duct
The method of supporting the bus bars is sim
member and a narrower flanged floor duct mem
ple and requires no drilling or tapping and the
ber secured within the main duct member, said
construction of the bus bars makes it possible
members having flangesvextending in opposite di
to connect successive lengths of the bus bars by
rections and with a slot left between each flange
the simple telescopic joining or splicing pieces.
upper part eliminate exposed sharp edges. They
2,412,882
5
6
ley collector, the flanges of the upper duct mem
of the cover duct member and a flange of the nar
rower iloor duct member, bus bars supported be
tween the duct members and a trolley collector
vhaving arms extending through said slots and
carrying wheels supported on the flanges of the
narrower floor duct member and contacts slidable-
ber terminating in rolled edges and supporting
hangers having edges flanged and interlocked
with said rolled edges of the upper duct member.
l1. In a bus duct system, a~duct comprising
a channel-like outer duct member and a narrow
er inner duct member secured thereto, said mem
against the respective bus bars. the distance be
bers having flanges which extend in opposite
tween the upper surfaces of the guide tracks and
directions and overlap but are spaced apart to
the opposite wall of the cover member being less
than the overall diameter of the trolley wheels 10 leave trolley slots along the opposite flanges of
the narrower duct member and bus bars sup
but suflicient to leave clearance for the trolley
ported between said duct members, the flanges of
wheels to run on the tracks.
7. In a bus duct system, a duct comprising a
channel-like upper duct member and a narrower
the narrower inner duct member constituting
tracks for supporting a trolley collector, a por
15 tion of the narrower duct member being hinged
to swing away from the plane of the adjacent
lower duct member ysecured thereto, said mem
bers having flanges which extend in opposite di
portions of said duct member to provide access
rections and overlap but are spaced apart to leave
to the bus bars and to permit insertion and re
trolley slots along the opposite flanges of the nar
moval of a trolley collector.
rower duct member, bus bars supported between
12. In a bus duct system, a duct comprising a
said members and accessible through the respec 20
main channel-like covering duct member and a
tive slots, the flanges of the narrower duct mem
narrower track duct member secured thereto, said
ber constituting' tracks for supporting a trolley
members having Vflanges which extend in oppo
collector and a trolley collector having sides which
site directions and are spaced apart to leave
extend through the slots along the opposite
trolley slots along the opposite flanges of the
flanges of the narrower duct member, wheels car
narrower duct member, bus bars supported be
ried by the sides of the collector running along
tween said members and between the flanges of
the tracks and contacts carried by said sides and
the track duct members, the flanges of the nar
coacting with the respective bus bars.
rower duct member constituting tracks for sup
8. In a bus duct system, a duct comprising a
channel-like cover duct member and a narrower 30 porting a trolley collector, a portion of the nar
rower duct member being .hinged to swing away
from the plane of the adjacent portions of said
duct member to provide access to the bus bars.
13. In a bus duct system, a duct comprising a
lower duct member secured thereto, said members
having flanges which extend in opposite direc
tions and overlap but are spaced apart to leave
trolley slots along the opposite flanges of the nar
rower duct‘member, bus bars supported between
said members and accessible through the respec
tive slots, the flanges of the narrower duct mem
ber constituting tracks for supporting a trolley
collector and a trolley collector having a channel
like member embracing the narrower duct mem
channel-like outer duct member and a narrower
inner duct member secured thereto, said mem
bers having flanges which extend in opposite -
directions and overlap but are spaced apart to
leave trolley slots along the opposite flanges of
40 the narrower duct member and bus bars sup
ber and having sides extending through the slots
along the opposite flanges of the narrower duct
member, wheels carried by the sides of the chan
nel-like member rolling along the ilanges of the
ported between said duct members, the ñanges
narrower duct member, the distance between the
upper surfaces of the guide tracks and the oppo
site wall of the cover member being less than the
to swing away from the plane of the adjacent
portions of said duct member to provide access
to the bus bars and to permit insertion and
overall diameter of the trolley wheels but sufñ
cient to leave clearance for the trolley wheels to
removal of a trolley collector and means for inter
run on the tracks, and contacts carried by said -
sides and coacting with the respective bus bars.
9. In a bus duct system, a duct comprising a
channel-like upper duct member and a- narrower
lower duct member secured thereto, said mem
bers having 4ilariges which extend in opposite di
`rections and overlap but are spaced apart to
leave -trolley’slots along the opposite flanges of
thenarrower- duct member and bus bars sup
ported between said members and not readily
1 accessible through the respective slots, 'the flanges
of the narrower duct member `constituting tracks
for supporting a trolley collector,` the fianges of
the upper duct member terminating in' rolled
edges for supporting hangers having edges flanged
and interlocked with said rolled edges of the
upper duct member.
'
10. In a bus duct system. a duct comprising
of the narrower inner duct member constituting
tracks for supporting a trolley collector, a por
tion of the narrower duct member being hinged
locking the hinged portion to the narrower duct
member.
,
,
14.l In a bus duct system, a duct comprising _a
channel-like outer duct member and a narrower
inner duct member secured thereto, said’mem
bers having flanges which extend in opposite
directions and overlap but are spaced apart to
leave trolley slots’A along theopposite flanges of
thenarrower duct member and bus bars sup
-ported between said duct members, the ilanges
of the narrower inner duct member constituting -
tracks forl supporting a trolley collector, a por
tion of the narrower duct member being hinged
' to swing away from the plane of the adjacent
portions of said duct member to provide> access
to the- bus bars and to- permit insertion and .
removal of a trolley collector and a 'bolt carried
by the hinged portion for coacting with thenarrower duct member to interlock said portion
a channel-like cover duct member and a narrower
and member.
lower track duct member secured thereto, said
members having flanges which extend in opposite
directions and are' spaced apart to leave trolley
slots along the opposite flanges o-f the narrower
track duct member, bus bars supported between
said members, the flanges of the narrower duct
member constituting tracks for supporting a trol
15. In a bus duct system, a duct comprising a
channel-like outer duct member and a narrower
inner duct member secured thereto, said mem
. ~
bers having ilanges which extend in opposite
directions and overlap but are spaced apart tc
leave trolley slots along the opposite flanges of
the narrower duct member and bus bars sup
2,412,382
ported between said duct members, the :flanges
of the narrower inner duct member constituting
tracks for supporting a trolley collector, a por
tion of the narrower duct member being hinged
to swing away fromkthe plane of the adjacent
portions of said duct member to provide access
to the bus bars and to permit insertion and re
‘
8
moval of a trolley collector, said hinged portion
and narrower duct member having coacting edges
for limiting the inward swing of the hinged?
portion.
`
WILLIAM C. ANDERSON.
GEORGE J. NABER.
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