U.S. patent number 3,624,648 [Application Number 04/850,607] was granted by the patent office on 1971-11-30 for graphic display annunciator.
This patent grant is currently assigned to Reliance Electric Company. Invention is credited to John G. Willoughby.
United States Patent |
3,624,648 |
Willoughby |
November 30, 1971 |
GRAPHIC DISPLAY ANNUNCIATOR
Abstract
An annunciator system for displaying and controlling operating
conditions of a plant process, including a graphic display which
indicates the changing conditions of the plant operation. The
graphic display comprises a metal sheet with a high iron content, a
translucent display panel positioned in parallel and spaced
relationship with respect to the metal sheet, and at least one lamp
positioned in the space between the metal sheet and the panel. The
lamp includes a magnetized base which engages and is supported from
the metal sheet. Circuitry is connected between the lamp and the
components of the annunciator system whereby the lamp illuminates a
portion of the display panel in response to a condition in the
annunciator system.
Inventors: |
Willoughby; John G. (Leeds,
AL) |
Assignee: |
Reliance Electric Company
(Cleveland, OH)
|
Family
ID: |
25308622 |
Appl.
No.: |
04/850,607 |
Filed: |
August 15, 1969 |
Current U.S.
Class: |
340/815.55;
340/525; 362/398; 340/815.77; 340/286.13 |
Current CPC
Class: |
H02B
15/00 (20130101) |
Current International
Class: |
H02B
15/00 (20060101); G09f 009/38 () |
Field of
Search: |
;340/225,381 ;240/52.15
;35/6,7A ;40/131R,132D,142A |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Griffin; Robert L.
Assistant Examiner: Orsino, Jr.; Joseph A.
Claims
I claim:
1. In an annunciator system for monitoring and displaying operating
conditions of a plant process or the like, the improvement therein
of a graphic display device comprising a metal sheet, a translucent
display panel positioned in parallel spaced relationship from said
metal sheet, and at least one lamp positioned in the space between
said metal sheet and said panel, said lamp including a magnet
member engaging and supporting the lamp from said metal sheet and
comprising a rectangular magnet block with opposed flux emitting
surfaces, said lamp comprising an L-shaped bracket with one of its
legs connected to a surface of said magnet block which extends
normal to said flux emitting surfaces, and an electric lamp socket
connected to the other of its legs, and circuit means for
electrically connecting said lamp to the components of an
annunciator system whereby said lamp illuminates a portion of said
display panel in response to a condition in the annunciator
system.
2. The invention of claim 1 and wherein said metal sheet comprises
a substantially impervious flat metal sheet disposed in an upright
attitude, and wherein said circuit means comprises a plurality of
electrical connectors positioned adjacent at least one edge of said
sheet.
3. The invention of claim 1 wherein said lamp extends across the
space between said metal sheet and said panel and includes a shield
normally juxtaposed said panel to confine the light emitted from
said lamp to a small area of said panel which corresponds in size
to the size of said shield.
4. The invention of claim 1 and wherein said translucent display
panel comprises a pair of juxtaposed substantially transparent
support sheets and an intermediate translucent sheet carrying a
graphic display, said support sheets being attached together at
their edges.
5. The invention of claim 1 and further including a strip of
material with an adhesive backing attached to said metal sheet
directly below said lamp in such a manner as to limit any downward
sliding movement of said lamp on said metal sheet.
6. The invention of claim 1 and further including a cabinet and
wherein said metal sheet includes flanges at its edges extending
generally at right angles with respect to said metal sheet, said
metal sheet being positioned within the confines of said cabinet
with its flanges maintaining said sheet in spaced relationship with
respect to one side of said cabinet, and wherein said translucent
display panel comprises a door hingedly connected at one of its
edges to said cabinet and pivotal to and from its parallel spaced
relationship with respect to said sheet.
7. In an annunciator system for displaying and controlling
operating conditions of a plant process or the like, the
improvement therein of a graphic display device comprising a
normally upright lamp support sheet, a translucent door normally
maintained in parallel spaced relationship with respect to said
lamp support sheet, and at least one lamp positioned between said
lamp support and said translucent door, said lamp comprising a
magnet support block magnetically connected to said lamp support
sheet, a lamp support bracket having one end connected to said
magnet support block, a lamp fixture connected to the other end of
said lamp support bracket, and a shield extending from said lamp
fixture toward said translucent door for confining the light
emitted from said light fixture to a small area on said translucent
door, whereby said lamp is mountable in an infinite number of
positions on said support sheet to illuminate an infinite variation
of positions on said translucent door.
8. The invention of claim 7 and further including a strip of
material connected to said lamp support sheet immediately below
said lamp to limit the downward sliding movement of said lamp on
said lamp support sheet.
Description
BACKGROUND OF THE INVENTION
Annunciator systems have been developed for monitoring and
displaying operating conditions in complex process plant systems.
The typical annunciator system might include a plurality of gages
for indicating pressures, temperatures, quantities, etc. for
illustrating the various conditions in the process plant. When a
complex process is displayed by an annunciator system, the various
details and indicators may be so many in number and so complex in
their arrangement that a graphic display is desirable in order for
the plant operators to understand and easily read the various
indicators. A graphic display of this type might include a
translucent panel positioned in or near the annunciator cabinet
which carries symbols that represent pumps, valves, liquid levels,
pressures, and other plant equipment and conditions, and flow lines
extending between the various symbols. The various symbols on the
display panel are illuminated by lamps placed behind the display
panel, and the light emitted from the lamps would represent various
plant conditions. For instance, when a lamp illuminates the symbol
of a pump on the display panel, it would indicate a certain
condition existing in a corresponding pump in the process plant: if
the pump were in operation, overheated, or not operating properly.
Similarly, a lamp might be utilized to illuminate the symbol of a
storage tank to indicate an empty, properly filled, or an
overfilled condition in the storage tank.
While various graphic display panels for annunciator systems have
been developed in the past, the versatility of the display has been
somewhat limited in that the display applied to the display panel
must correspond to the various lamp positions that can be attained
behind the display panel. For instance, one of the previously
developed display panels comprises a grid or honeycomb structure
that receives lamps in the openings of the grid. This allows a lamp
to be positioned in any of the openings of the grid but prevents a
lamp from being moved to positions between the openings. In order
to have the display properly illuminated by the lamps supported by
such grid, it has been necessary to place the sheet of translucent
material on which the display is to be created over a layout of the
lamp support grid and place the symbols of the process plant which
are to be illuminated by the lamps over the openings in the grid
layout. With this procedure the plant display will have its symbols
which are to be illuminated properly located with respect to the
lamp support grid when applied to the display panel. Of course,
there are many instances when the engineering draftsmen is unable
to properly illustrate the plant process because of the limitations
of the grid versatility, or the draftsmen may not have access to a
layout of the lamp support grid.
When a graphic display panel is manufactured with a lamp support
grid, the entire grid must be utilized with the display panel in
order to provide the desired versatility of such a display, even
though only one or a few lamps may be needed for the particular
display desired. Of course, this makes even the most simple display
almost as expensive as a more complex display having a multitude of
lamps for illuminating numerous points on the translucent display
panel. Furthermore, the grid utilized to support the lamps is
usually hinged to the annunciator cabinet in order that the lamps
and their electrical connections can be extended through the rear
of the grid and the bulb of each lamp will be exposed to the front
of the grid and the backside of the translucent display panel. This
arrangement is expensive to construct, is not highly versatile, and
is cumbersome to arrange.
SUMMARY OF THE INVENTION
Briefly described, the present invention comprises a graphic
display annunciator for displaying operating conditions of a
process plant and which includes a plurality of lamps positioned
behind a translucent display panel. The lamps are movable to
virtually any position behind the display panel to provide complete
versatility in illuminating the symbols applied to the display
panel. The lamps each include a magnetized base, and a metal
support sheet is placed in a parallel, spaced relationship behind
the translucent display panel, and the lamps are supported from the
metal sheet at any position thereon.
Thus, it is an object of this invention to provide a graphic
display annunciator with a display panel having lamps for
illuminating the panel that can be positioned at any position with
respect to the rear surface of the panel.
Another object of this invention is to provide a graphic display
panel in combination with a process plant annunciator which
includes lamps for illuminating various symbols of a plant process
on a display panel, which is inexpensive to manufacture, the lamps
of which can be arranged to illuminate virtually any symbol at
virtually any position on the display panel, and which is reliable
to represent the various conditions within the process.
Other objects, features and advantages will become apparent upon
reading the following disclosure, when taken in conjunction with
the accompanying drawing.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a perspective view of a graphic display annunciator.
FIG. 2 is a partially exploded perspective view of the display
panel assembly of the annunciator.
FIG. 3 is a side cross-sectional view of the display panel
assembly.
FIG. 4 is a perspective view of a lamp utilized in the display
panel assembly.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now in more detail to the drawing, in which like numerals
indicate like parts throughout the several views, FIG. 1 shows
graphic display annunciator 10 which includes cabinet 11 having a
lower portion 12 and an upper graphic display portion 14. A
plurality of indicating gauges, dials, switches, and other devices
15 are supported in the front face of the lower portion of cabinet
11, while display panel assembly 16 is supported in the front face
of upper graphic display portion 14 of cabinet 11.
As shown in FIG. 2, display panel assembly 16 is connected to the
framework of cabinet 11. Display panel assembly 16 includes metal
pan 18 which has a virtually flat body portion or sheet 19 and
flanges 20 at its upper and lower edges at its side edges (not
shown). Flanges 20 extend substantially at right angles with
respect to body portion 19 and terminate in connecting flanges 21.
Connecting flanges 21 are attached to the framework 22 of the
cabinet, in such a manner that body portion 19 is spaced inwardly
of the framework. Translucent panel assembly 24 is hingedly
connected to the upper frame member 22 and comprises support sheet
25, display sheet 26, and outer sheet 28. Display sheet 26 carries
the graphic display of the plant process, with symbols which
represent pumps, storage tanks, valves, switches, and other
elements utilized to control and operate the process plant. Display
sheet 26 can be fabricated of virtually any translucent or
transparent material, including paper or Mylar sheets. The support
sheet and outer sheet can be translucent or transparent, as may be
desired. Display sheet 26 is placed between support sheet 25 and
outer sheet 28, and outer sheet 28 is attached to support sheet 25
by means of border strip 29 and screws 30 extending through aligned
openings in border strip 29, outer sheet 28 and support sheet 25.
Thus, translucent panel assembly 24 comprises a translucent
laminate of sheets.
As is best shown in FIG. 3, support sheet 25 of translucent panel
assembly 24 is connected to the upper framework member 22 by means
of hidden hinges 31. Hinges 31 are attached to support sheet 25 in
such a manner that they are normally hidden from view when
observing the outside surface of translucent panel assembly 24.
Furthermore, hinges 31 are arranged so that the outer surface of
translucent panel assembly 24 normally is substantially coextensive
with the outer surface of cabinet 11. With this arrangement,
translucent panel assembly 24 can be pivoted about its hinges 31
from the open position as shown in FIG. 2 to the closed position as
shown in FIG. 3. Apertured locking tabs 32 extend in an upward
direction from lower framework element 22, and threaded screws 34
extend through aligned apertures defined in the sheets of
translucent panel assembly 24 to engage locking tabs 32 and rigidly
connect translucent panel assembly 24 at its bottom edge to lower
framework member 22. This maintains translucent panel assembly 24
in a closed condition with respect to cabinet 10 and in a parallel
spaced relationship with respect to pan 18.
As is best shown in FIG. 4, lamp 35 comprises magnet support block
36 which has front and rear flux emitting surfaces 38 and side
surfaces 39. L-shaped bracket 40 has one of its legs 41 connected
to a side surface 39 of magnet support block, and its other leg 42
supports lamp fixture 44. Lamp fixture 44 extends through an
opening (not shown) in leg 42, and shield 45 protrudes through the
opening from lamp fixture 44. Shield 45 is externally threaded and
can be rotated to adjust its length of protrusion from leg 42.
Locknut 46 is threaded over shield 45 to rigidly connect shield 45
with respect to leg 42. With this arrangement, the length of lamp
35 from the back flux emitting surface 38 of its magnet block to
the outer edge of shield 45 can be adjusted. If desired, shield 45
can be spring urged (not shown) toward the inside of the
translucent panel assembly so that the shield engages the panel
assembly. Wires 48 are connected to lamp fixture 44 and extend to
an electrical connection to illuminate the light bulb (not shown)
if desired to maintain a neat and orderly appearance inside display
panel assembly 16.
Magnet support block 36 magnetically connects lamp 35 to body
portion 19 of metal pan 18 in such a manner that lamp fixture 44
and its shield 45 extend toward support sheet 25 of translucent
panel assembly 24. Shield 45 is adjusted so that it is juxtaposed
the inside surface of support sheet 25, to substantially isolate
the light emitted from the lamp fixture to a small portion of
translucent panel assembly 24. While magnet support block 36
rigidly connects lamp 35 to metal pan 18, lamp 35 can be removed by
tugging its away from metal pan 18. In order that lamp 35 can be
accurately repositioned in its former location on metal pan 18
after having been removed, a strip of material 49 having an
adhesive backing (not shown) is normally applied to body portion 19
of metal pan 18 at a location immediately below and adjacent lamp
35. The strip of material 49 can be of virtually any texture or
configuration; however, it is also usually desirable to label the
strip of material with an appropriate symbol or word to indicate
which lamp belongs at this position. The strip of material should
be of some substantial thickness in order that the lamp 35 can be
placed in abutment with the upper edge 50, and the strip of
material utilized as a bench mark. Furthermore, the thickness of
the strip of material 49 is chosen so that any vibrations
encountered by cabinet 11 and metal pan 18 of display panel
assembly 16 will not function to cause lamp 35 to walk or creep in
a downward direction. Of course, the strip of material can be
removed from or relocated on metal pan 18 when its lamp is to be
removed from or relocated. To further aid in locating the lamps
inside display panel assembly a grid system (not shown) can be
imprinted on the surface of pan 18 which would simplify the initial
locating of the lamps.
As is best shown in FIG. 3, wires 48 from each lamp 35 are
connected to a bank of terminals 51 which extend along upper flange
20 of metal pan 18. A slot 52 is defined in the upper flange, and
electrical connection is made through slot 52. Wires 54 are
connected to the bank of terminals 51 and extend back in a downward
direction to the lower indicating control portion 12 of cabinet 11
to make appropriate electrical connection between lamps 35 and the
controls of cabinet 11. Wires 48 of lamps 35 terminate in a
U-shaped wedge which is received in a clip of the bank of terminals
51, to provide a quick disconnect arrangement.
OPERATION
When an annunciator is connected to a process system, the various
gauges, meters, etc. 15 are connected to the front face of cabinet
11. The electrical feed-in signals for the gauges and dials are
also connected to the bank of terminals 51 by means of wires 54 and
other circuitry from the gauges, etc., up over metal pan 18.
Display sheet 26 of display panel assembly 16 has a schematic
representation of the plant process applied thereto. The
representation may include symbols for tanks, pumps, switches,
valves, blowers, and any of the other equipment utilized in the
plant. Display sheet 26 is sandwiched between support sheet 25 and
outer sheet 28 of translucent panel assembly 24, and the sheets are
rigidly connected together by means of screws 30 extending through
aligned apertures of border strip 29, outer sheet 28 and support
sheet 25.
Lamps 35 are then positioned within the space 55 between metal pan
18 and translucent panel assembly 24, by applying magnet support
block 36 to body portion 19 of metal pan 18. This rigidly connects
lamp 35 to body portion 19 with lamp fixture 44 projected toward
translucent panel assembly 24. Lamps 35 will be positioned so that
lamp fixtures 44 emit light toward a symbol of display sheet 25, to
illuminate the symbol. The wires 48 from lamp 35 are connected to
the terminals of the bank of terminals 51 that are connected to the
appropriate wires 54 leading to the control device or gauge in the
lower indicating control portion 12 of cabinet 11 which corresponds
to the symbol that the lamp 35 is to illuminate on translucent
panel assembly 24. Thus, each lamp 35 will be illuminates in
response to a condition of the corresponding equipment in the
plant.
When translucent panel assembly 24 is closed, the engineer can
observe the outer face of the translucent panel assembly to detect
proper alignment of lamps 35 with their corresponding symbols. If
one or more of the lamps are not exactly aligned with their
corresponding symbols, the engineer can open the panel assembly and
move the lamp into proper alignment. After the lamp has been
properly aligned, the engineer can apply a strip of material 49 to
the face of metal pan 18 at a position directly below and in
abutment with the bottom of lamp 35, which provides a bench mark on
the face of metal pan 18 for that particular lamp 35. The strip of
material 49 can be labeled with a word or symbol to indicate which
lamp is to be positioned at this location. Furthermore, the strips
of material 49 will prevent the lamps 35 from walking or creeping
in a downward direction due to vibrations or other conditions
experienced by cabinet 11.
The shields 45 of the lamps 35 can be rotated and moved outwardly
or inwardly with respect to lamp 35 to abut the inside surface of
translucent panel assembly 24, or to be displaced inwardly of the
panel assembly, as may be desired. With this arrangement, the light
from the lamp can be isolated to a small area on the translucent
panel assembly 24 or can be dispersed over a larger area.
Once the display sheet 26 has been included in the translucent
panel assembly 24 and the lamps properly located and connected, the
assembly is ready for permanent operation. If the plant process is
modified by the rearrangement, deletion or inclusion of equipment,
or if the display applied to display sheet 26 is modified in any
manner, the lamps can be included in the system or some of the
lamps 35 can be disconnected and removed from the system, as may be
necessary. Also, lamps 35 can be relocated at any point on the
surface of pan 18, without limitation. Thus, the engineer has
virtually no limitation with respect to the display desired on
display sheet 26 and the proper illumination of the symbols used in
the display.
While the invention has been disclosed as displaying the conditions
of a plant process, it should be obvious that various different
systems can be monitored and the conditions thereof graphically
displayed by the invention. For instance, a power system for a
building, dam, ship or plant can be displayed, and elevator, air
conditioning, heating, storage and conveying conditions can be
displayed, as well as many other operating, storage, power and
similar systems. Therefore, while this invention has been described
in detail with particular reference to preferred embodiments
thereof, it will be understood that variations and modifications
can be effected within the spirit and scope of the invention as
described hereinbefore and as defined in the appended claims.
* * * * *