Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
CA 02605831 2011-12-14
53873-12
Utility Patent Application
For
LUMINAIRE JUNCTION BOX
FIELD OF THE INVENTION
[001] The present invention relates generally to a lighting fixture, and more
particularly, to an outdoor luminaire assembly which can be adapted for use in
different configurations.
BACKGROUND OF THE INVENTION
Typical prior art features for outdoor luminaire assemblies require an in
wall junction box for affixation of the luminaire electrical connectors to
line voltage
source. Thus, prior art luminaires require both the in wall junction box in
combination
with junction box mounting hardware which allows mounting of the luminaire in
a
single orientation against the junction box surface or face. Separate hardware
is
required for both wall mount and canopy mount of the luminaire in order to
properly
orient the luminaire with respect to the mounting surface. Thus, it is
desirable to
provide a luminaire having a support arm which provides the ability to mount
the
luminaire in both a canopy mount and wall mount or sconce orientation while
also
providing a combined junction box and mounting arm for electrical
connectivity. The
present invention provides such structure for a combined junction box and
mounting
arm that allows for canopy mounting as well as mounting on a vertical surface
as
shown and described herein.
SUMMARY OF THE INVENTION
In one aspect of the present invention, there is provided a combination
junction box and multiposition mount arm comprising: a luminaire having a
first and
second illumination head connected to and extending outward from a support
housing, said support housing having a rear angled mounting surface; a
junction box
mounting arm interposed between a flat mounting surface and said luminaire
support
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53873-12
housing and having a surface mounting face extending radially outward from a
junction box mounting arm and an angled mount surface for mounting against
said
luminaire rear angled mounting surface, said junction box mounting arm forming
a
junction box between said flat mounting surface and said support housing;
wherein
said rear angled mounting surface on said luminaire removably affixes to said
angled
mount surface of said junction box to allow said luminaire be fixedly mounted
against
a vertical surface when said mounting arm is in a first orientation or a
horizontal
surface when said mounting arm is in a second orientation.
In yet another aspect of the invention, there is provided a multi-position
mount arm and a luminaire comprising: a housing having a rear beveled mount
surface; a mounting arm having a beveled mounting face; at least one
illumination
head extending from said housing; said mounting surface and said mounting face
having configurations enabling a first and second removable attachment
orientation
therebetween; said first removable attachment orientation having a rotational
orientation of about 180 between said housing and said mounting arm than said
second removable attachment orientation; one of said first and second
rotational
orientations enabling canopy mounting of said luminaire and the other of said
first
and second rotational orientations enabling mounting of said luminaire to a
vertical
surface.
BRIEF DESCRIPTION OF THE DRAWING FIGURES
[002] Fig. 1 is top perspective view of a luminaire and mounting arm in
accordance with one embodiment of the present invention showing it in a
position for
mounting on a vertical surface.
[003] Fig. 2 is top perspective view of the luminaire and mounting arm of
Fig. 1 showing it in a position for mounting on a horizontal surface.
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[004] Fig. 3 is a side view of the luminaire and mounting arm of Fig. I
showing an
adjustable illumination head in a forward rotated position.
10051 Fig. 4 is a front view of the luminaire and mounting arm of Fig. 1
showing a
diffuser for adjusting a motion sensor lens.
[0061 Fig. 5 is a bottom view of the luminaire and mounting arm of Fig. 1
showing
the position of lamps in the illumination heads and lenses thereon.
[0071 Fig. 6 is an exploded view of the luminaire and mounting arm of Fig. I
showing the internal and external components thereof and their cooperation
therebetween.
[0081 Fig. 7 is a side view of a housing of the luminaire of Fig. 1 showing
features
for cooperating with a support arm and a pivot barrel.
10091 Fig. 8 is a side view of an illumination head of the luminaire of Fig. 1
showing
features for cooperating with a pivot barrel.
[010] Fig. 9 is a front view of a pivot barrel of the luminaire of Fig. 1
showing
features for cooperating with a housing.
[011] Fig. 10 is a perspective view of a pivot barrel of the luminaire of Fig.
1
showing features for cooperating with a housing and an illumination head.
[0121 Fig. 11 is a perspective view of the pivot barrel of Fig. 10 showing it
rotated
180 with features for rotatingly engaging an illumination head.
10131 Fig. 12 is top perspective view of the luminaire of Fig. I showing a
relamping
feature.
1014] Fig. 13 is perspective view of the housing member of the luminaire of
Fig. 1
showing a beveled mounting surface.
10151 Fig. 14 is rear perspective view of the luminaire of Fig. I showing the
internal
side of a combination junction box and mounting arm.
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DETAILED DESCRIPTION OF THE EMBODIMENTS
10161 Referring now to the Figures and in accordance with an embodiment of the
present invention, luminaire 100 is shown and described. In Fig. 1, luminaire
100 is
shown engaged with multiposition mounting arm 110 in a position for mounting
on a
vertical surface such as a wall. Luminaire 100 has a right illumination head
120
rotatably engaged with a right housing component 132 and a left illumination
head 122
rotatably engaged with a left housing component 130. Right and left housing
components 132 and 130 engage to form a support housing having rear angled or
beveled mount surface 196. The support housing 131 may be multi-part or may be
unitary. Mounting arm 110, in this embodiment, has a hollow interior which
optionally
forms a junction box between a flat mounting surface and the support housing
formed
with housing 131. Combined junction box mounting arm 110 has an outwardly
radial
extending mounting flange or surface mounting face 111 for receiving a
mounting plate
which engages the mounting surface. The hollow interior of mounting arm
junction box
110 is formed by at least one mounting arm sidewall and is sufficient in size
to act as a
junction box to connect electrical wires from luminaire 100 to electrical
power supply
wires extending from the mounting surface into mounting arm junction box 110.
In the
embodiment shown, the side wall of mounting arm 110 is tubular with beveled
mounting face or angled mount surface 197 engaged with rear bevel mount
surface 196
of housing 131 of luminaire 100 in an orientation such that junction box
mounting arm
110 is mountable against a vertical surface. The tubular sidewall of combined
junction
box and mounting arm 110 has a long side oriented on an upper surface and a
short side
oriented on a lower surface creating side beveled mounting face 197. Beveled
mounting face 197 preferably is about 45 relative to a substantially vertical
plane
defined by mounting flange 111.
[0171 In Fig. 2, luminaire 100 is shown engaged with multiposition mounting
arm
110 in a position for mounting on a horizontal surface, such as a canopy
mount.
Luminaire 100 has a right illumination head 120 rotatably engaged with a right
housing
component 132 and a left illumination head 122 rotatably engaged with a left
housing
component 130. Housing components 132 and 130 engage to form a support housing
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131 having rear beveled mount surface 196. Combined junction box mounting arm
110
has surface mounting flange 111 horizontally positioned with beveled mounting
face or
angled mount surface 197 engaged with rear bevel mount surface 196 of
luminaire 100 in
an orientation such that junction box mounting arm 110 is in a position for
mounting
against a horizontal surface. The tubular sidewall of combined junction box
and
mounting arm 110 has a long side oriented on a surface opposite luminaire 100
and a
short side oriented on a surface proximate luminaire 100 creating side beveled
mounting
face 197. Beveled mounting face 197 is about 45 relative to a plane defined
by
mounting flange 111.
[018] Fig. 3 shows luminaire 100 in a substantially horizontal orientation
with
adjustable illumination heads 120 and 122 and the orientation of motion sensor
lens 150
about luminaire 100. Luminaire 100 is shown engaged with multiposition
mounting
arm 110 in a position for mounting on a vertical surface. Luminaire 100 has a
right
illumination head 120 engaged with the support housing 131 and a left
illumination
head 122 engaged with the support housing 131. Right illumination head 120 is
shown
rotated outwardly away from mounting flange Ill at an angle a in relation to a
horizontal surface below or in relation to a plane normal to the mounting
surface. In
one embodiment, angle a is between about -10 and 30 (shown in Fig. 3). It is
to be
understood that angle a may have any degree range, even 360 . Left
illumination head
122 is adjustable independently of right illumination head 120 and is shown
pointed
downward with an angle a of 0 . Also shown here is motion sensor lens 150
having
diffuser 160 covering an outer portion thereof. Control cover 140 covers a
lower
opening of the support housing 131 formed with combined components 130 and 132
where motion sensor lens 150 downwardly depends. Diffuser 160 allows
directional
control of sensor lens 150 by permitting a user to cover a portion of sensor
lens 150
thereby eliminating an area from the view of sensor lens 150.
[019] Fig. 4 shows a front view of luminaire 100 engaged with multiposition
mounting arm 110 having mounting flange 111 in a position for mounting on a
vertical
surface. Luminaire 100 has a right illumination head 120 engaged with a right
housing
component 132 and a left illumination head 122 engaged with a left housing
component
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130 which are combined to form a support housing 131. Both, right illumination
head
120 and left illumination 122 are shown rotated toward a downward position,
i.e. a=0 .
Motion sensor lens 150 has diffuser 160 covering an outer right portion
thereof. Motion
sensor lens diffuser 160 is optional as having motion sensor lens 150
completely exposed
enables the sensing of motion 360 about the luminaire. In the embodiment
shown,
diffuser 160 covers a right half of motion sensor lens 150 thus eliminating
the sensing of
motion to the right of luminaire 100. It is to be understood that diffuser 160
can have any
configuration or placement about sensor lens 150 to block the sensing of
motion in any
direction relative to luminaire 100. Typically, when motion is sensed by the
sensor
typically a PIR sensor located within housing 131 adjacent lens 150, luminaire
100 is
switched on and it is therefore advantageous to shield the sensing of traffic
or blowing
trees from sensor lens 150. Control cover 140 covers a lower opening in the
housing
formed with components 130 and 132 where motion sensor lens downwardly depends
therethrough.
[020] Fig. 5 shows lamps 121 and 125 within illumination heads 120 and 122
respectively. Luminaire 100 is configured for mounting on a vertical surface
with
mounting flange 111 having mounting arm 110 depending thereform. Control cover
140 is shown covering the housing proximate mounting flange 111. Depending
through
control cover 140 is motion sensor lens 150. Motion sensor lens 150 houses a
sensor
and is shown here without diffuser 160, providing 360 sensing capability. Any
type of
sensor will suffice and one of skill in the art will understand that various
structures are
available for use as a sensor described and claimed herein. Extending outward
from
right housing component 132 is right illumination head 120. Lamp 121 extends
into
right illumination head 120 from a lamp socket in housing component 132.
Illumination head 120 has right reflector 123 covering the inner surface
thereof and lens
126 covering a lower opening thereof. The illumination head is placed at 0
providing
full cutoff lighting. Extending outward from left housing component 130 is
left
illumination head 122. Lamp 125 extends into left illumination head 122 from a
lamp
socket in housing component 130. Illumination head 122 has left reflector 124
covering
the inner surface thereof and lens 127 covering a lower opening thereof.
Similarly,
head 122 is positioned at 0 providing full cutoff lighting.
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[021] Fig. 6 shows an exploded view of luminaire 100 and mounting arm 110
showing the internal and external components thereof and their cooperation
therebetween. Mounting gasket 167 covers a rear surface of mounting plate 166,
both
of which are fastened to a mounting surface. Bubble level 165 on an outer
surface of
mounting plate 166 provides for a visual indication of level mounting of
mounting plate
166 on a mounting surface. Mounting flange 111 mounts onto mounting plate 166
and
has mounting arm 110 extending thereform. Extending inward from the sidewall
of
mounting arm 110 is a pair of inwardly extending fastening tabs 113 for
removable
affixation of rear beveled mount surface 196 onto beveled mounting face or
angled
mount surface 197 on mounting arm 110. Right and left housing components 132
and
130 removably affix with gasket 164 therebetween forming substantially sealed
luminaire support housing 131. Of course, the housing can be of any desired
construction, unitary assembly or other structure. Extending outwardly through
right
housing component 132 is lamp socket 162 and extending outwardly through left
housing component 130 is lamp socket 163. Positioned about right lamp socket
162 is
pivot barrel 180 having o-ring gasket 181 therearound for sealing with right
illumination head 120. Positioned about left lamp socket 163 is pivot barrel
170 having
o-ring gasket 171 therearound for sealing with left illumination head 122.
Right lamp
121 removably attaches in lamp socket 162 and extends through pivot barrel 180
into
right illumination head 120. Right illumination head 120 pivotally attaches to
pivot
barrel 180 and surrounds a portion of lamp 121. Reflector 123 mounts within
right
illumination head 120 and covers the internal side thereof. Lens 126 mounts
within a
lower edge of right illumination head 120 proximate the outer edge of
reflector 123
making right illumination head 120 full cutoff, i.e. intensity does not exceed
zero
candela at or above an angle of 90 above nadir and maximum candela does not
exceed
10% of rated lumens at a vertical angle of 80 -90 above nadir, when rotated
in a
downward projection (a = 0 , Fig. 3). Left lamp 125 removably attaches in lamp
socket
163 and extends through pivot barrel 170 into left illumination head 122. Left
illumination head 122 pivotally attaches to pivot barrel 170 and surrounds a
portion of
lamp 125. Reflector 124 mounts within left illumination head 122 and covers
the
internal side thereof. Lens 127 mounts within a lower edge of left
illumination head
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122 proximate the outer edge of reflector 124 making left illumination head
122 full
cutoff.
[022] Fig. 7 is a side view of left housing component 130 showing features for
cooperating with support arm 110 and a pivot barrel 170. Right housing
component
132 is a mirror image of left housing component 130 and has similarly
designated
components thereof. Left housing component 130 has outer partial cylindrical
extension 190 extending outwardly which is received within a groove between
two
concentric cylindrical extensions extending outwardly from left illumination
head 122.
Left illumination head 122 is a mirror image of right illumination head 120
and hence
has similarly situated concentric cylindrical extensions with similar
designations.
[023] Opposing alignment structures 193 are provided to properly align pivot
barrel
170 against the housing 130 in order to properly position the lamp housing at -
10 for
installation, as will be discussed herein. In general, the design of the
housing 131, pivot
barrels 170, 180 and lamp heads 120, 122 is such as to allow two different
installation
angles for heads 120, 122 depending on the orientation of installation of the
barrels 170,
180. Barrels 170, 180 are designed with two rotation channels 220 and 224,
each of
different are length (see Figures 10-11). Each channel has an entry channel
201
allowing lamp head pivot tab 202 to enter into the rotation channel. Tabs 212
of barrels
co-act with tabs 193 on support housing such that upon installation of the
pivot barrel
into the cylindrical extension 190 and mounting surface, entry channel 201 is
positioned
at about -10 thus requiring the lamp head to be axially installed over the
pivot barrel at
-10 , then rotate clockwise by a maximum amount defined by the length of the
channel
and the end wall or surface thereof Thus, for installation, tab 202 of the
right lamp
head enters entry channel 201 such that lamp head is at -10 from horizontal
and then
rotated clockwise depending upon the arc length of the channel 224. With
channel 220
installed facing upwards, tab 202 can rotate forward to place lamp at 0 thus
allowing
rotation of 10 , from -10 to 0 . No further forward rotation would be allowed
thus
limiting the lamp to a cut-off position. Channel 224 would allow further
rotation if
installed upwards allowing a desired forward rotation to position the lamp at
forward
throw of about 30 , dictated by the length of channel 224. Of course, many
other
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orientations and structures of the channels and end surfaces are configurable
as can be
understood including a single entry channel with no forward rotation to place
the lamp
head at 0 degrees thus installing at 0 degrees instead of at -10 degrees.
10241 Fig. 8 shows two concentric cylindrical extensions 204 and 206 extending
outwardly from right illumination head 120. Left illumination head 122 has
similarly
situated concentric cylindrical extensions cooperating with outer partial
cylindrical
extension 190. Concentrically located within outer partial cylindrical
extension 190 is
pivot barrel mounting surface 191 having a pair of equidistantly spaced
partial
cylindrical extensions 193 extending outwardly having fastener receptacles 192
positioned between side edges of each partial cylindrical extension 193.
Partial
cylindrical extensions 193 and fastener receptacles 192 permit the non-
rotational
removable attachment of pivot barrel 170 to the support housing 131. Rear
beveled
mount surface 196 has an angle of (3 with the lower horizontal surface of
housing 131.
Preferably, (3 is about 45 allowing attachment to arm mount 110 for dual
surface
installation on a horizontal or vertical surface. Dual surface installation is
accomplished
with the attachment of rear beveled mount surface 196 to arm mount 110
oriented for
installation on a horizontal surface and attachment to arm mount 110 oriented
for
installation on a vertical surface. Rear beveled mount surface 196 has a bump
out
portion 195 for providing room within support housing 131 for the containment
of the
electronics and wiring associated with the motion sensor and lamp sockets 162
and 163.
Mounting tabs 194 project from rear beveled mount surface 196 for engagement
with an
aligning tab in arm mount 110. One tab 194 engages an aligning tab in arm
mount 110
when luminaire 100 is installed onto arm mount 110 for mounting on a vertical
surface
and the other tab 194 engages the aligning tab in arm mount 110 when luminaire
100 is
installed onto arm mount 110 for mounting on a horizontal surface. Of course,
many
different types of rotatable interfaces are available for use between the lamp
heads and
the lamp housing which would restrict forward rotation, for example rotation
outward
away from a vertical surface on which the luminaire is mounted. Such
restrictable and
rotatable mounting structures can be comprised of many different instruments
but it is
desirable to limit forward rotation in a first installed position to keep the
luminaire at a
cut-off zero degrees while allowing for a second installed position of the
rotatable
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mounting structure between the lamp head and the luminaire to provide positive
forward rotation greater than zero degrees. Restrictable rotational mechanisms
may be
utilized between the lamp head and the housing. Preferably, as shown in one of
the
embodiments, installation and positioning of the lamp heads is restricted to
about 0
degrees in one installed orientation and to greater than 0 degrees in an
alternative
installed orientation of the rotation mechanism interface between the lamp
head and the
luminaire housing. Thus a two position rotation mechanism is desirable
although not
required.
10251 Fig. 8 is a side view of right illumination head 120 showing features
for
cooperating with pivot barrel 180 and right housing component 132. Left
illumination
head 122 is a mirror image of right illumination head 120 and has similarly
designated
components. Illumination head 120 has an aperture for receiving pivot barrel
180 and
lamp 121. The aperture is surrounded by a cylindrical extension 204 which has
pivot
guide 202 extending inward proximate the inner surface of illumination head
120 (see
also Fig. 13). Cylindrical extension 206 concentrically surrounds cylindrical
extension
204 and has a gap therebetween for receiving partial cylindrical extension 190
on right
housing component 132. Threaded aperture 208 extends between cylindrical
extensions
206 and 204 and has an outer wall therebetween for receiving fastener 151 to
secure the
head in position.
10261 Figs. 9 - 11 show different views of left pivot barrel 170. Fig. 9 shows
an
inner surface of pivot barrel 170 that cooperates with left housing component
122 at
pivot barrel mounting surface 191 (Fig. 7). Wing projections 212 cooperate
with the
pair of equidistantly spaced depending partial cylindrical extensions 193 and
threaded
fastener receptacles 210 align with fastener receptacles 192 in housing
component 130
wherein fasteners non-rotationally and removably attach pivot barrel 170 to
housing
component 130. Extending from the circumference of pivot barrel 170 is
mounting
surface 214 which mounts substantially flush with mounting surface 191 on
housing
component 130 (Fig. 7).
[0271 Figs. 10 and 11 show side features of pivot barrel 170 for cooperating
with
illumination head 122. On the side, shown in Fig. 10, illumination head
retaining
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groove 218, receiving a portion of fastener 151 (Fig. 8), and rotating pivot
notch 220 are
shown. On the opposite side, shown in Fig. 11, illumination head retaining
groove 222,
receiving a portion of fastener 151 (Fig. 8), and rotating pivot notch 224 are
shown.
Pivot notches 220 and 224 each extend on an outer surface to enable removal of
the
illumination heads 120 and 122 about a longitudinal axis of lamps 121 and 125
when
rotated inward to -10 from vertical. When pivot barrel 170 is engaged with
illumination head 122 so that pivot notch 220 rotatingly cooperates with pivot
guide
202, only a -10 rotation of illumination head 122 is permitted about housing
component 130 for removal since the arc length of pivot notch 220 and
retaining groove
222 are relatively short and situated for downward orientation, a=0 (Fig. 3),
and a
reverse rotation of - 10 , or inward rotation where a=-10 (Fig. 3), for
removal of
illumination head 122 for relamping. Rotating pivot barrel 170 180 and
installing it
onto illumination head 122 serves to align pivot notch 224 upwardly and
retaining
groove 218 downwardly with pivot notch guide 202 and threaded aperture 208,
having
fastener 151, respectively. In this configuration, an increased forward
rotation of
illumination head 122 about housing component 130 is permitted since the arc
length of
pivot notch 224 and retaining groove 118 are relatively long. Preferably,
illumination
head 122 can rotate outwardly about housing component 130 at least 30 , a=30
(Fig.
3), or even more, and inwardly at about - 10 from vertical, aligning
illumination head
122 for removal and relamping. Also shown in Figs. 10 and 11 is gasket groove
216
which receives o-ring gasket 171 (Fig. 6) and cooperates with an inner surface
of
cylindrical extension 204 on illumination head 120.
[0281 Fig. 12 is top perspective view of the luminaire 100 showing it having
illumination heads 120 and 122 removed for relamping. Right and left housing
components 132 and 130 are joined forming a support housing 131 having side
apertures wherein pivot barrels 180 and 170 are mounted. Extending from the
housing
through an aperture in each pivot barrel 180 and 170 are lamp sockets 162 and
163.
Illumination heads 120 and 122 are removed for relamping by first retracting
fasteners
151 in threaded apertures 208 in each illumination head 120 and 122 to a point
where
the head of the fastener no longer engages an illumination head retaining
groove 218,
222 in pivot barrels 180 and 170. The illumination heads 120 and 122 are then
rotated
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about pivot barrels 180 and 170, approximately -10 , aligning rotating pivot
guides 202
with a portion of a pivot notch 201 axially extending to an edge thereof thus
enabling
the removal of the illumination heads 120 and 122 about a longitudinal axis of
lamps
121 and 125. Lamps 121 and 125 are removed from lamp sockets 162 and 163 and
replaced. Illumination heads 120 and 122 are then reattached to pivot barrels
180 and
170. Also shown here are electric wires 229 that extend through wiring
aperture 133
into combined junction box mounting arm 110 for electrically connecting lamps
121
and 125 as well as sensor lens 150 to a power supply.
10291 Fig. 13 is a view of a housing member 131 formed with housing components
130 and 132 showing rear angled or beveled mount surface 196 for engaging with
beveled mounting face or angled mount surface 197 on arm mount 110. Rear
beveled
mount surface 196 has a bump out portion 195 for providing room within a
housing for
the containment of the wiring and electronics associated with sensor lens 150
and lamp
sockets 162 and 163. Wiring aperture 133 is centrally oriented within bump out
portion
195 providing for electronic access to components within the housing from
junction box
mount arm 110. Tabs 194 project from rear beveled mount surface 196 for
engagement
with an aligning tab in arm mount 110. One tab 194 engages an aligning tab in
arm
mount 110 when luminaire 100 is installed onto arm mount 110 for mounting on a
vertical surface and the other tab 194 engages the aligning tab in arm mount
110 when
luminaire 100 is installed onto arm mount 110 for mounting on a horizontal
surface.
Proximate corners of bump out portion 195 are threaded apertures 135 providing
for a
means for attachment of the housing to arm mount 110 via a pair of inwardly
extending
fastening tabs 113. Also shown here are outer partial cylindrical extensions
190
depending outwardly from each housing component 132 and 130.
10301 Fig. 14 is rear perspective view of luminaire 100 engaged with
combination
mounting arm and junction box 110 showing the internal side thereof forming a
junction box. Luminaire 100 is shown engaged with multiposition mounting arm
110 in
a position for mounting on a vertical surface. Luminaire 100 has a right
illumination
head 120 and a left illumination head 122 engaged with a housing component
131.
Mounting arm 110 is shown as having a hollow interior which forms a junction
box
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between a flat mounting surface to which it is mounted and the support housing
formed
with housing components 132 and 130. Combined junction box mounting arm 110
has
an outwardly radial extending mounting flange or surface mounting face 11 1
for
receiving mounting plate 166 and mounting gasket 167 (shown in Fig. 6) which
engages
the mounting surface. Mounting gasket 167 covers a rear surface of mounting
plate 166
(Fig. 6), both of which are fastened to a mounting surface and have aligning
central
apertures for receiving electrical wires. Mounting tab 195 is positioned about
mounting
flange 111 for installing mounting arm 110 on mounting plate 166. Mounting tab
195
depends inward from an upper surface of mounting flange 111 and engages a slot
in the
top of mounting plate 166. Aperture 197 receives fastener 199 for engaging a
lower
portion of mounting plate 166, securing mounting arm 110 onto mounting plate
166. The
hollow interior of mounting arm junction box 110 is formed by a cylindrical or
tubular
mounting arm sidewall and is sufficient in size to act as a junction box to
connect
electrical wires 229 from luminaire 100, and other wires or electrical
connections such as
ground wire 227, to electrical power supply wires and other electrical
connectors
extending from the mounting surface into mounting arm junction box 110 through
mounting plate 166. Depending inward from the sidewall of mounting arm 110 is
a pair
of inwardly extending fastening tabs 113 for removable affixation of luminaire
100 onto
mounting arm 110. One fastening tab 113 has a threaded aperture for receiving
fastener
225 for securing ground wire 227 thereto.
[0311 Generally described herein is a luminaire with either single or dual
lamp
heads, each of the lamp heads rotatably attached to a luminaire housing by a
restricted
rotational mechanism. This restricted rotation mechanism is interposed between
the
luminaire housing and the lamp head and generally imposes a rotational
limitation on
the lamp head. Presently, in one of the embodiments disclosed, the rotation
mechanism
is a pivot barrel that is rotatable into a first installed position and a
second installed
position, each mapping to a first restricted motion position for the lamp
head.
Alternative rotation mechanisms are also contemplated which perform the same
or
similar functions, such as knuckles, pivot pins or similar pivot mechanisms.
Further, in
one embodiment shown and described, the restricted rotation mechanism is a
pivot
barrel which is installable in a locked position within a side aperture of the
luminaire
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housing. Each installed locked position represents a specific rotation
capability for the
lamp head, in one embodiment representing allowing installation of the lamp
head at a
-10 degrees relative to horizontal with counterclockwise rotation allowable to
position
the lamp head at about 0 degrees. Thus, the pivot barrel has a rotation
limitation
structure which allows minimal, about 10 degrees, rotation of the lamp head.
In the
second installed position, the restricted rotation mechanism of the present
embodiment
may allow further rotation beyond 0 degrees relative to horizontal. In one
embodiment
the length of channels formed on either side of the pivot mechanism determines
the
length of allowable rotation. Still further, one embodiment details additional
structures
which perform similar rotation functions. Additionally, in the embodiments
shown, a
junction box mounting arm is mountable directly against the luminaire, and
preferably
against a mounting surface, which allows installation against either a
horizontal or a
vertical surface while maintaining lamp head position relative to the ground.
Such
mounting arms described may also provide an interior which acts to allow space
for
junction box function. The mounting arm has a beveled surface in one
embodiment
which acts to engage a similar mounting surface on the luminaire. Alternative
structures, as clearly shown herein, may provide similar functional mounting
surfaces
and structures. While the present invention has been shown and described
herein in
what are considered to be embodiments thereof, the invention is not limited to
those
specific embodiments. Thus, the forms of the invention shown and described
herein are
to be taken as illustrative only and other embodiments may be selected without
departing from the scope of the present invention, as set forth in the claims
appended
hereto.
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