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Jam. 7', 1947'.
2,413,953
J. A. coMsTocK
CASING- FOR ELECTRICAL DEVICES
Filed Feb. -2l,_ 1945‘ I
2 Sheets-Sheet >l_ - -
r
BY
V
'
‘
mmvroa
Jam 7; 1947.
J.‘ ,A. coMsTocK‘ '
2,413,953
CASING FOR ELECTRICAL DEVICES
Filed Feb. 21‘, 1945
2 Sheets-Sheet 2
EVIAI‘YENTOR‘.
Patented Jan. 7, 1947
2,413,953
‘UNITED STATES‘ PATENT OFFICE
2,413,953
CASIIN G FOR ELECTRICAL DEVICES
.ia-rnes A. Cornstock, Clyde, N. Y., assignor, by
mesne assignments to Acme Electric Corpora
tion, a corporation of New York
Application February 21, 1945, Serial No. 579,129
5 Claims.
1
(Cl. 174—52)
2
My invention relates to a case for electrical
devices
general,
more particularly to a
case ior an electrical device having lead wires
case with the enclosure plate broken away at one
end.
There are two standard methods of mounting
extending therefrom such, for example as trans
?uorescent lighting ballast cases or boxes. One
formers, reactors and ballast. In this applica
method is to enclose the ballast case Within a
tion, the inve ion will
described in conjunc
top housing on the re?ector. In this type of
tion with ballast
thus the term “ballast”
mounting, the lead wires are normally extended
hei'eidaitv used
all
interpreted as includ
through the ballast case at the end of the case.
ing the tr nsformer and a reactor or other de
second method of mounting is called “ex
vices.
10 posed mounting” and employs a ballast case from
An object
my invention is to provide a case
which the lead lines are extended through the
for an electrical circuit ballast which is adapt
botton. The ballast case is mounted on top
able to allow the wires of he ballast to extend
of the top housing in an exposed position to allow
from
case in either 01 two dire tions and
a greater dissipation of heat. The lead wires
to permit
wires to be moved from one posi 15 extend irom the bottom of the ballast case and
tion to the other.
into the top housing of the ?xture which en
Another object of my invention is to provide a
closes the distributing wires to the ends of the
case for an electrical circuit ballast which is
?uorescent tube.
adaptable to allow the wires of the ballast to
extend from the case in either
it is
practice to provide two types
outwardly or 20 of ballast cases for these two needs.
downwardly direction and to permit the wires to
be moved from one position to the other.
Another object of my invention is to provide a
case for an electrical circuit ballast having lead
wires, the case having a continuous opening ex 25
te ding around a corner ti erect to permit a selec
tic-n of positions for the
wires to extend
erefrom whereby the ballast may be used in
either enclosed conduits. or positioned on top or
on the outside of a no’ duit.
If an en
closed mounting is desired, a “standard” ballast
case is furn' ed in which the leads extend from
the end of the
If the ballast case is to
be mounted Y the exposed mounting position,
the “bottom” lead. type case is furnished. It will
readily be seen that a double supply of ballast
cases must be kept on hand at all times with this
type of practice
order to meet the needs.
My improved ballast c30 provides
on the other hand,
continuous slot extending along two
Another object of ___y ll‘ ntion is to provide a
angularly joined walls of
case in order that
case for
electrical device which is adapted
the lead wires
be placed in either of the two
to be secured to a surface by screws or the like,
required positions, and may readily be moved
and which ‘is provided with a hook~shaped open
one position to the other. Therefore, in
ing for the lead '\ “es of the device, whereby 35 stead of double supply of cases, only one supply
the wires may
moved away from the screw
of cases need
carried in stock and these may
while the screw '
being tightened.
Otter obiectu and a fuller understanding of
my invention. 2?. y be had.
be adapted to the particular needs.
Further, the standard practice of securing these
referring to the
ballast case.
to provide a flange at either end
following description and claims, taken in con 40 of the case with a slot therein to be engaged by
junction with the accompanying drawings, in
a screw, or similar fastening device. It has been
which:
found, that with the ballast cases of the “stand
Figure 1 is a broken away View of a ?uorescent
ard type” the wires often extend from the case
lighting unit employing a top housing channel
in a position directly above the described slot,
for lead wires and
ballast unit mounted on 45 and therefore interfere with the tightening or the
top;
fastening means. Also, the wires are in a posi
Figure is a broke: caway view of a ?uorescent
tion whereby they may be damaged when the
l’ghtirg unit employing a too housing channel
screw is inserted or removed
therefore, pr0_
which encloses both the wiring and the ballast
duoe a ?re hazard. My invention also provides
50 for oositioning the lead wires a lateral distance
unit;
Figure 3 is a side view of a ballast case em—
away from the securing means. and therefore,
bodying the features of my invention and illus
they do not interfere with the tightening of the
hating the ballast lead wires extending from the
screw. or become damaged during the tightening
operation.
ends of the case as toositioned when the core is
enclosed. and in phantom the lead wires are 55
With reference to the Figure 1, I illustrate a
illustrated in the position assumed when the case
broken away section of a standard overhead i-u~
is mounted on too of the housing conduit;
crescent illuminating unit in which the reference
Figure 4: is an view of Figure 3;
character iii indicates the reflector that shields
Figure 5 is a bottom view of Figure 3; and
a suitable number of ?uorescent tubes H.
Figure 6 is a perspective view of my improved.
Mounted on top of the re?ector H), is a top
2,413,953
4
3
housing i2 which is employed to serve as a con
dam I1 and therefore, a space 33 is provided.
Lead wires l3 extend through an opening 32 into
the space 33 provided by the dam I? and there
after pass out through the continuous slot 24,
The space 33 provided by the dam l1, therefore
permits the lead wires 13 enough freedom of
duit for the lead wires it. These lead wires I?»
extend to the end of the re?ector unit (not
shown) and to other auxiliary equipment em
ployed with the unit. In the Figure l, I illustrate
my improved ballast case M as being mounted
in the exposed mounting position, therefore the
movement within the case so that they may be
wires from the case it extend from the bottom
moved from one end of the continuous slot 24
of the case and are not illustrated. The case M
to the other.
is secured to the top housing l 2 by means of suit 10
In operation, the case may be removed from
stock with the wires l3 extending from any por
tion of the continuous slot 24, and the wires may
be moved to the plane desired dependent upon
method, in which the ballast case I 4 is secured
directly to the top of the re?ector H! by means
the need. In the event that the wires l3 are to
of Screws 22, and is enclosed by the top housing 15 extend in the “standard” direction, that is, from
able screws 22.
V
The Figure 2 illustrates the enclosed mounting '
the end walls I5 of the case, the wires are posi
tioned as described, near the terminus 28 of the
hook slot 25. The wires l3 will stay in place near
mounting illustrated in the Figure 2, the wires
the terminus 28, because the tab 29 opposes lateral
extend through a continuous slot 24, of which 20 movement thereof. The screw 22 may then be
turned Without damage to the Wires l3. On the
only a hook portion 25 is illustrated, but which
extends around the end E5 of the case. It will
other hand, if the Wires I3 are to extend from the
be noted with reference to the Figure 2, that the
7 bottom of the case, as in the “exposed mounting,”
lead wires 5 3 are positioned at the terminus 28
the wires [3 are moved into the slot 26, and
of the hook portion 25, and are held against lat 725 thereafter will not be in position to interfere with
eral movement toward the screw 22 by means of
the operator of the screws 22.
Although I have described my invention with
a tab 29.
Referring to the Figures 3 to 6, I illustrate the
a certain degree of particularity, it is understood
speci?c details of one embodiment of my inven
' that the present disclosure has been made only
tion. This embodiment comprises generally 30 by way of example and that numerous changes
’ three longitudinal walls 30, two end walls 15,
in the details of construction and the combina
and a closure plate It. Securing ?anges 2| ex
tion and arrangement of parts may be resorted
' tend substantially perpendicularly from the end
to without departing from the spirit and the
walls l5 and serve to hold the closure plate It
scope of the invention as hereinafter claimed.
and also serve as securing ?anges to be contacted
I claim as my invention:
by screws 22. The ?anges 2| are perforated by
1. A case for an electrical device having at
openings or holes l9, and the closure plate I6 is
least a lead wire disposed to extend from the
provided with projecting surfaces l8 which ex
said electrical device to the exterior of said case,
tend into and through the holes i9 and interlock
said case comprising at least a ?rst and a second
therewith.
40 angularly disposed wall meeting at a corner, a
Slots 26 are provided in the closure plate l6
first slot portion in said ?rst wall extending to
substantially along the center line thereof, and
the said corner and a second slot portion in said
slots Z'l are provided in the ?anges 2!. The slots
second wall extending to the said corner, said
27 divide the ?anges 2| intermediate their ends.
slot portions joining at said corner to form a
In fact, each of the ?anges 2| may be considered 45 continuous slot through which the said lead wire
as two separate ?anges separated by a space
‘may extend, said lead Wire being extendable in
therebetween which constitutes the slot 21'. The
one direction from the case through one of the
hook-shaped slots 25 in the end Walls iii are
said slot portions and being extendable in a sec»
disposed to join or register with the slots 26 and
ond direction from the case through the other of
the slots 2'! at corners 3!. It will be seen there 50 said slot portions, said wire being movable in
fore, that for each end of the case, the joined
said slot from one position to the other to change
slots in the angularly disposed walls which may
the direction in which it extends from the case,
be referred to as slot portions, provide a contin
at least one of said slot portions being hock
uous slot, port or opening extending around the,
shaped and having a terminus disposed in a lat
corner through which the ballast lead wires i3 5 eral direction from the place where the slot por
may extend. In these illustrations, the lead
tions join, a portion of the case Wall on one side
wires [3 are shown in full lines extending
of the said hook-shaped slot portion forming a
through the hook-shaped slots 25, and are illus
tab between the said terminus and the place
trated in dot dash lines extending through the
' where the slot portions join, whereby the tab op
closure plate slots 26. These two positions are 60 poses the lateral movement of the lead wire to
the far extreme through which the lead wires
ward the place where the slot portions join when
83 may be moved, and are the two normal work
the lead wire is placed in the hook-shaped por
ing positions which the Wires may assume,
tion near the terminus thereof.
With reference now to the Figure 6, the broken
2. A case for an electrical device having at least
away portion of the closure plate 16 reveals the 65 a lead wire disposed to extend from the said
interior of the ballast box at one end thereof.
electrical device to the exterior of said case, said
When the electrical apparatus is inserted Within
case comprising at least a ?rst and a second
angularly disposed wall meeting at a corner, a
the metal box during manufacture, a small dam
H is placed to slope from a pointbeyond the
vsecuring ?ange extending from said corner dis
apex of the hook-shaped slot substantially as 70 posed perpendicular to said first wall and sub
stantially in the plane of the second wall, a ?rst
illustrated. A plastic material 2i], such as a suit
able insulating compound; is poured into the case
slot portion in said ?rst wall extending to the
said corner and a second slot portion in said
and ?lls and surrounds the electrical equipment.
second wall extending to the said corner, said slot
However, this material 23 is held away from the
region adjacent the corner 3| by means of the 75 portions joining at said corner to form a continu
I 2. The lead wires l3, in this case, are illustrated
extending from the end of the case i it. In either
the mounting illustrated in the Figure l or in the
5
2,413,953
6
oils slot through which the said lead wire may ex~
tend, the said securing ?ange being divided and
forming a ?ange slot, the said ?ange slot ex
tending to said corner and joining the said con
tinuous slot, the edge of the said ?ange slot be
ing disposed to be engaged by securing means,
said lead wire being extendable in 0 -e
from the case through one of the said
tions and being ext-endable in a second
from the case through the other of said
direction
slot por
direction
slot poi“ l0
larly disposed wall meeting at a corner, a securing
?ange extending from said corner disposed per
pendicularly to said ?rst wall and substantially
in the plane of the second wall, a wall slot in
said ?rst wall through which the said lead wire
may extend, the said securing flange being di
vided and forming a ?ange slot, the said ?ange
tions, said wire being movable in said continuous
slot extending to said corner 'ld joining the
wall slot, the edges of said ?ange slot being
posed to be engaged by securing means, the
wall slot being hook-shaped and having a
said
dis
said
ter
tion
slot to
andthe
through
other tosaid
change
?ange
theslot
direction
from one
in which
n'iinus disposed in a lateral direction from the
join, a portion of the said ?rst Wall on one side
slot forming a tab between the said terminus and
place where the wall slot and the ?ange slot join,
it extends from the case, at least the said ?rst wall
said lead wire being extendable through the
slot portion being hook-shaped and having a 15 said wall slot and being movable in said wall slot
terminus disposed in a lateral direction from the
irom one position to the other, a portion of the
place where the slot portions and the ?ange slot
said wall on one side of the said hook-shaped
of the said hook-shaped slot portion forming a
the place where the wall slot joins the ?ange
tab between the said terminus and the place where 20 slot, whereby the tab opposes the lateral move—
the slot portions join, whereby the tab opposes
ment of the lead wires toward the place where
the lateral movement of the lead wire toward the
the wall slot joins the ?ange slot when the lead
place where the slot portions join when the lead
wire is placed in the hook-shaped portion near
wire is placed in the hook-shaped portion near
the terminus thereof and thereby positions the
the terminus thereof and thereby positions the 25 said lead wire away from the said securing means.
said lead wire away from the said securing means.
5. A case for an electrical device having lead
3. A case for an electrical device having at
wires disposed to extend from the said electri
least a lead wire disposed to extend from the said
cal device to the exterior of said case, said case
electrical device to the exterior of said case, said
having two end walls and being closed by a clo
case comprising at least a ?rst and a second
sure plate, said end walls and closure plate com
angularly disposed wall meeting at a corner, a
securing ?ange extending from said corner dis~
prising angularly disposed walls meeting at oppo
posed perpendicular to said ?rst wall and sul —
stantially in the plane of the second wall, a ?rst
slot portion in said ?rst wall extending to the
said corner and a second slot portion in
said second wall extending to the said cor
ner, said slot portions joining at said cor
ner to form a continuous slot through which
site corners, a securing ?ange extending from
each of said corners and disposed perpendicular
to said end walls at said corners and substan—
tially in the plane of the closure plate,
end
Wall having a first slot portion extending to its
respective corner and the closure plate having
two separate slots positioned at extremities there-
of and extending to the said corners, each said
the said lead wire may extend, the said securing 40 end wall slot joining a closure plate slot at the
?ange being divided and forming a ?ange slot, the
corners to form continuous slots through which
said ?ange slot extending to said corner and join
the said lead wires may extend, each said se
ing the said continuous slot, the edge of said
curing ?ange being divided and forming a ?ange
?ange slot being disposed to be engaged by se
slot, each said ?ange slot extending to its re
curing means, said electrical device and the in 45 spective corner and joining the said continuous
terior of said case de?ning a space therebetween
slot, the edges of said ?ange slots being disposed
in the region of the said corner, said lead wire
to be engaged by securing means, said electrical
being extendable in one direction from the case
device and the interior of said case de?ning spaces
through one of the said slot portions and be
therebetween in the region of the corners, said
ing extendable in a second direction from the 50 lead wires being extendable in one direction irom
case through the other of said slot portions, said
the case through the closure plate slots and being
wire being movable in said space and said con
extendable in a second direction from the case
tinuous slot and through said ?ange slot from
through the end wall slot portions, said wires be
one position to the other to change the direction
ing movable in said spaces and said continuous
in which it extends from the case, at least the 55 slots and through said ?ange slots from one posi
said ?rst wall slot portions being hook-shaped
tion to the other to change the direction which
and having a terminus disposed in a lateral di
they extend from the case, at least the end wall
rection from the place where the slot portions
and the ?ange slot join, a portion of the said
slot portions being hooked~shaped, said hooked
shaped portions having a terminus disposed in a
?rst wall on one side of the said hook-shaped
lateral direction from the place where the hool-z
60
slot portion forming a tab between the said ter~
shapod slot portion and the ?ange slot join, a
minus and the place where the slot portions join,
portion of the said end wall on one side of the
whereby the tab opposes the lateral movement
said hook-shaped slot portion forming a tab be
of the lead wire toward the place where the slot
tween the said terminus and the place where
portions join when the lead wire is placed in the
the slot portions join, whereby the tab opposes
hook-shaped portion near the terminus thereof 65 the lateral movement or" the lead wires toward
and thereby positions the said lead wire away
the place where the slot portions join when the
from the said securing means.
lead wire is placed in the hook-shaped portion
4. A case for an electrical device having at least
near the terminus thereof and thereby positions
a lead wire disposed to extend from the said
the said lead wires away from the said securing
electrical device to the exterior of said case, said 70 means.
case comprising at least a ?rst and second angu
JAMES A. COWSTOCI”.
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