U.S. patent number 3,916,404 [Application Number 05/311,951] was granted by the patent office on 1975-10-28 for detecting, alerting and directing system.
This patent grant is currently assigned to Thomas Industries, Inc.. Invention is credited to Paul J. Gouge.
United States Patent |
3,916,404 |
Gouge |
October 28, 1975 |
Detecting, alerting and directing system
Abstract
This is a system for the protection of personnel in an enclosed
space. It comprises a danger detecting system such as a thermally
operated electronic controller covering the area under protection,
a distinctive audible alarm system which produces a recognizable
sound or sound pattern audible throughout the area or enclosure to
be protected, and visual directing means indicating the location of
one or more exits and/or the direction in which a suitable exit
lies. This visual directing system employs, preferably, a sign
animated as by the flashing on and off of so-called strobe lights
located at an exit, and the audible alarm signal is produced at the
same exit. An auxiliary electric power supply system stands in
reserve to take over the duty of providing electric power at any
required time and, particularly, to be available for operating the
detector circuits and the flashing light and warning sound circuits
at low voltage from a storage battery which is constantly under
recharge. The low voltage battery system can operate the protective
and directing system for a reasonable time, such as 1 hour, in the
event of failure of the commercial A.C. supply system.
Inventors: |
Gouge; Paul J. (Sparta,
TN) |
Assignee: |
Thomas Industries, Inc.
(Sparta, TN)
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Family
ID: |
26828933 |
Appl.
No.: |
05/311,951 |
Filed: |
December 4, 1972 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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130890 |
Apr 5, 1971 |
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Current U.S.
Class: |
340/815.69;
40/570; 340/815.53; 340/815.55; 340/332 |
Current CPC
Class: |
G08B
7/062 (20130101) |
Current International
Class: |
G08B
7/06 (20060101); G08B 7/00 (20060101); G08B
5/22 (20060101); G08B 5/36 (20060101); G08B
007/00 () |
Field of
Search: |
;340/227,371,378,326,332,220 ;40/132R,132D,128.1,125N |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Caldwell; John W.
Assistant Examiner: Wannisky; William M.
Attorney, Agent or Firm: Johnson, Dienner, Emrich &
Wagner
Parent Case Text
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation of my copending application Ser.
No. 130,890, filed Apr. 5, 1971 and now abandoned.
Claims
The invention claimed is:
1. In a system of the class described for use with an enclosure
having one or more exits for personnel, a detection system having
sensors disposed throughout the enclosure, said sensors being
responsive to the development of conditions deleterious to the
occupants of the enclosure, a visual warning device comprising a
housing having a front wall including a transparency adapted to be
normally illuminated for continuously indicating the location of an
exit, a lamp for illuminating said transparency, auditory alarm
means activated by response of said sensors to said deleterious
conditions to sound a distinctive warning signal audible throughout
said enclosure warning the occupants to go to and out through an
exit, means also activated by response of said sensors to cause
flashing of said lamp, said visual device and said auditory alarm
means being juxtaposed adjacent an exit whereby the occupants of
the enclosure may be guided by sight and/or sound toward an
exit.
2. For use in an alarm system for warning the occupants of an
enclosure to vacate the same, an alarm signaling device comprising
a housing adapted to be supported at the upper end of an exit from
said enclosure, said housing having a front face comprising a
transparency with warning characters which, when illuminated,
indicate the presence of said exit, lighting means in said housing
adapted to be illuminated to make said characters conspicuous,
means for emitting a warning sound signal of loud and distinctive
character, said sound emitting means being disposed in said housing
and being arranged to emit said warning sound signal in the general
direction towards which said warning characters are faced, and
means responsive to predetermined conditions in said enclosure for
illuminating said warning characters and for activating said
auditory warning signal to give the occupant who receives either
signal the direction in which the exit from the enclosure lies with
respect to him.
3. An alarm system for use in connection with an enclosure having
an exit, said system comprising a housing adapted to be mounted on
the inside of the enclosure adjacent the upper end of the exit,
said housing having a face with visual indications facing towards
the inside of the enclosure, said housing face comprising a
transparency including characters signifying the presence of an
exit, and additional characters consisting of one or more arrows
which when intermittently illuminated suggest motion toward the
exit, an audible alarm device adapted to emit in a direction away
from said exit a loud and distinctive warning sound said device
being supported adjacent said illuminated indicators, and danger
sensing means distributed throughout the enclosure to detect a
condition for which evacuation is desirable, the illumination of
said transparency and sounding of said audible alarm device being
activated by response of said danger sensing means.
4. In a system of the class described for warning the occupants of
an enclosure having an exit, to evacuate the same through said exit
which comprises a detector circuit having sensors responsive to an
inimical condition in the enclosure dispersed throughout the
enclosure, an auditory warning device for producing a warning of
loud and distinctive character, said device being located adjacent
the exit and being audible throughout the enclosure, a visual exit
indicator sign located adjacent the exit of the enclosure and
adjacent to the auditory warning device and means activated by
response of the detector circuit for causing the auditory warning
to be sounded and said visual exit indicator sign to be flashed
simultaneously, thereby providing the occupants of the enclosure
with independently receivable auditory and visual indications of
the direction in which the exit lies from an observer in the
enclosure.
Description
BACKGROUND OF THE INVENTION
It is present practice that where persons are employed in an
enclosed space, and fire, explosion, fumes, excessive heat or like
dangerous condition arises, the occupants are directed by posted
instructions to evacuate the enclosure. The various municipal state
and other governmental codes prescribe the obligations of the
management to provide warning and directions on what to do upon the
occurrence of such dangerous conditions. But no matter to what
extent personnel may be instructed by posted instructions, and
short of frequent fire drills or the like, personnel does not
become familiar with the location of the actually available exits,
as they do with washrooms and the like with which they are familiar
through usage.
I have observed the need for a system which will automatically
detect danger and distinctly warn the occupants to evacuate the
premises and will show them, and indicate by the direction from
which a warning sound emanates, the nearest or most suitable exit,
as well as the location of alternate exits, for use in case of
congestion at a particular exit.
SUMMARY OF THE INVENTION
The system of the invention is adapted to protect personnel who
occupy an enclosed space which may be a building or a part of the
same, or an area with such restrictions upon exit as to constitute
a threat to the safety of the occupants in the event that
conditions arise which endanger health or safety.
Since the most usual situation requiring the protection which this
system affords is a school, hospital, office building, factory,
warehouse, foundry or the like, involving walls which house the
operations or goods and enclose the workers or occupants, the need
for an efficient protective system is widespread.
The invention involves means well distributed throughout the
enclosure for detecting conditions which carry danger to the
occupants. Since such conditions may arise almost anywhere in the
enclosure and may develop suddenly, the detection system should
have its sensors as widely distributed throughout the space as
possible in order to respond promptly upon the occurrence of a
dangerous condition. This is accomplished by sensors connected in
parallel across a control circuit which promptly initiates an
audible alarm of a distinctive character that may be heard
throughout the enclosure. The visual and audible alarm producing
means is preferably centrally located at one exit so that its
warning may be heard throughout the enclosure, and persons going
toward it will come into sight of a flashing EXIT sign. Optionally,
a plurality of audible alarm warning devices may be disposed
adjacent the exit signs. Alternatively, the alarm may be placed in
each visual signal box or otherwise, according to any arrangement
which will ensure wide spread audible warning that will be heard
and recognized by the occupants so that in going toward the origin
of the sound signal the occupant will be brought into sight of the
flashing EXIT sign. The audible signal may be given by a horn which
produces a pulsating sound. Also at this time the visual direction
and location indicators are energized to direct the occupants to
the exits and to apprise them of the actual location of one or more
such exits. Where danger of congestion at some specific entrance or
exit of the building might tend to occur, the direction signaling
indicators may be so located as to divert personnel from particular
areas to go towards specific exits even though the actual distance
might be greater than the nearest exit. It is important that
occurrence of a dangerous condition be detected as quickly as is
feasible and that the entire personnel be alerted at once and
directed out through the nearest available exit or exits.
The provision of an auxiliary self-charging battery power supply
system assures the continued operation of the system for a
considerable period of time after initial energization of the
system.
The system has provision for testing and for connection with other
systems. Signal circuits extending outside the confines of the
partucular area for indicating a need for local or municipal fire
departments may be provided. The system has a supervisory circuit
which detects and gives visual alarm in case the sensing circuit
has become defective or broken. This circuit is designated as a
trouble alarm circuit. A small amber light on each unit stays lit
until the trouble is corrected.
Where there is danger of the path to the exit, or the signals
leading to them, being obscured or out of the direct line of
vision, an illuminated direction indicator may be provided for
providing local illumination and direction indication when the
sensor circuit is energized.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a diagram of an installation of the system of the present
invention;
FIG. 2 is a diagram of the power supply operational and testing
circuits for location in a common boxlike container which serves
also as an illuminated sign;
FIG. 3 is a diagram of a single unit system;
FIG. 4 is a perspective view of an illuminated exit sign;
FIG. 5 is a view of the exit sign disassembled; and
FIG. 6 is an illustration of an element of the sign showing an
arrow in silhouette.
DESCRIPTION OF THE PREFERRED EMBODIMENT
As indicated in FIG. 1, an enclosure having definite passageways or
runways such as may be found in schools, hospitals, office
buildings, factories, warehouses and the like, consisting in this
case of the longitudinal passageway 1 terminates in an exit 2 (at
the left of the figure) and extends to the right to a similar exit
3. This longitudinal passageway 1 is connected to a parallel
passageway 4 which extends from an exit 5 to a junction at 6 with a
transverse passageway 7. No exit is provided at the corner junction
6 but an exit 5 is provided at the left end of the passage.
The corridors or passageways which are indicated at 1, 4 and 7 may
be considered as aisles or passageways in a single building or in a
group of structures or in a common enclosure in which personnel is
enclosed and may be performing various duties throughout the
enclosure. In order to determine the conditions under which
evacuation of the enclosures should be conducted and to bring about
such evacuation requires, first, that there be means for detecting
the condition or conditions which require such evacuation anywhere
in the enclosure and, second, that all of the personnel in the
enclosure be simultaneously notified that evacuation is to be
effected immediately.
In an extensive enclosure with few exit doors or openings it is
difficult for the occupants of the enclosure to decide which way to
go as soon as the alarm is given for such evacuation of the
premises.
The present system is designed to assist them in making the
decision of which way to go to get to the nearest exit even though
they be in a part of the enclosure with which they are not familiar
and concerning which they may have no idea of the nearest exit.
As indicated in FIG. 1 the corridors 1, 4 and 7 are assumed to be
typical corridors in an extensive office building, school,
hospital, motel, warehouse, or factory complex. In order to
determine the existence of conditions requiring evacuation of the
building, I provide sensors which may be thermostatic switches
bridged across a pair of conductors along the lines 8a leading to a
sensing ralay. The heat sensitive sensors 8 are distributed
throughout the occupied space so that if, for example, a fire
should start somewhere nearby a heat sensor 8 would shortly be
activated and close the circuit to the sensing relay 9 shown in
FIG. 2. The two conductors 10 and 11 indicated in FIG. 2 include
the winding of the relay 9 and the low voltage battery 12. The
winding of the relay or electronic sensing circuit 9 is energized
to close the relay contacts 13 whereby to close the local circuit
which includes the pulsating audible signal 14 and the so-called
strobe lights 15 and 16 through the automatic interrupter 17 which
may lead a separate circuit to each of the lights 15 and 16 for the
purpose of indicating a direction of motion on the exit indicator
shown in FIGS. 4 and 5.
The pulsating audible signal 14 preferably emits a strong
high-pitched sound. Any form of distinctive sound signal which can
be heard all over the premises may be employed. This sound
producing element is housed in the upper compartment 18 of the exit
indicator fixture 19 of FIG. 4. Thereby the sound signal and the
light signal come from the same location--namely, the immediate
region of the exit. The occupant receiving either signal (or both
signals) can unerringly proceed to the exit.
Said exit indicator fixture 19 has a supporting bracket 20 which
may be mounted on a standard outlet box of an electrical
distribution system. The arm 20 is connected to the top of the
upper compartment 18 by screws so that the face of the sign may be
turned on a horizontal plane in any direction.
The bottom of the fixture 19 comprises a wall 22 which is slotted
or otherwise perforated. A transparent plastic plate overlies the
openings 23 in the bottom wall 22 to emit light from the lamps
contained in the fixture 19 as hereinafter explained. The body of
the fixture 19 permits endwise insertion and removal of the masking
plate or wall 24. This plate 24 had the word EXIT cut or stamped
therethrough so that by location of a ruby glass or similarly
colored plastic plate between the lamps in the central part of the
fixture 19 and the plate 24, it will produce the illuminated word
EXIT.
There are two end compartments in the fixture 19. These
compartments 25, 26 each contain a separate lamp or, if desired, a
larger number of lamps in each compartment back of the perforated
opening 27 formed in the removable plate 28 adapted to cover the
face of the ruby glass or red plastic plate overlying the end
compartment at each side of the central compartment. In FIG. 5 I
have illustrated the manner of assembly of the fixture 19, and in
FIG. 6 I have indicated the removable and reversible character of
the arrow indicating plate 28. The plates 28, 28 at each side of
the central compartment carry the arrow perforation with a glass or
plastic between the arrow shaped opening and the lamp, such as lamp
15 indicated in FIG. 5 which lies in each of the said end
compartments.
The ability to change the direction indication of the arrow
perforations 27 in the front of the side compartments permits
information in regard to the proper direction for the viewer to
pursue as is indicated, for example, in FIG. 1. In FIG. 1 three
different direction signals are indicated. At locations 2, 3 and 5
the arrow indications may be replaced by imperforate sheets which
blank off the end compartments or, under appropriate conditions,
the arrow indications may point towards each other--that is, toward
the center of the sign to indicate preference for the use of the
immediately adjacent exit. At the location 6 on FIG. 1 the two
arrows would be aligned in the same direction as in FIG. 4 of the
drawings to indicate that the the left, as viewed in FIG. 4, is the
proper direction to proceed towards the exit.
At location 30 in FIG. 1 the arrow indications 27, 27 would be
pointed to the left and to the right, respectively, to indicate
that either direction to an exit is available. Thus, at the
location 30 as indicated in FIGS. 1 and 3, the arrow indications
27, 27 point in opposite directions to indicate that an exit is
available either to the left at 2 in FIG. 1 or to the right at 3 in
FIG. 1. If desired, the word EXIT may be blanked off and only the
arrows 27, 27 (FIG. 6) illuminated intermittently pointing in
opposite directions or preferably the word EXIT is illuminated
along with the intermittenly illuminted arrow indications 27,
27.
The option to employ both visual and audible signals together
provides a new capability in directing the occupants of the
protected enclosure quickly and definitely to the outside of the
enclosure through an available exit.
The sytem is basically new in giving simultaneously to an occupant
of an enclosure two separate and distinct indications of the
direction from his position to an exit through which he can escape.
Hence impairment of either sight or hearing alone of an occupant of
the endangered enclosure does not render him unable to receive the
message to go to the indicated exit. My invention, by sending out
both kinds of signals from the same point of origin--namely, the
exit or its immediate vicinity--provides a new, unobvious and
useful utility.
The circuit arrangement shown in FIG. 2 indicates the manner of
maintaining a stand-by low voltage battery which is normally under
recharge.
At the left of FIG. 2 the standard 110 Volt A.C. supply circuit 32
is connected to the transformer 33 which, in turn, is connected on
its low voltage side to a solid state rectifier 34. It in turn is
connected permanently to the battery 12 supplying current during
the operation of the alarm circuit to the various lamps and to the
pulsating audible signal 14.
A series of low voltage lamps 35 are mounted in the central
compartment of the fixture 19 of FIG. 4 to illuminate the word EXIT
continuously. These lamps are bridged across the rectifier 34 and
consequently provide continuous illumination.
The botton wall of the fixture 19, as indicated at 23 in FIG. 4,
has openings which may be covered by transparency for casting light
down upon the door and threshold of the exit with which the sign is
associated.
A single unit sign having a sensor circuit 8a when activated closes
the relay circuits 13 in the low voltage alarm sensing circuit.
This in turn activates the pulsating audible signal 14 and sets
into operation the strobe lights 15, 16. Thereby the occupants of
the enclosure who are out of sight of the exit sign may be guided
by ear toward the exit. Then upon coming into view of the flashing
lights of the exit sign, the occupant may proceed through the exit
indicated.
The intermittent flashing of the arrow indications 27, 27 and the
steady illumination of the exit sign are effective in directing
personnel to the exit as soon as, or when, they are in view of the
illuminated sign.
The system shown in FIG. 2 may pass information to a supervisory
service as indicated at the right of FIG. 2 by the inductance and
capacitance in the line extension to a monitoring service or the
like. Provision is made through the test switch 38 shown in FIGURE
to close the alarm sensing circuit for testing purposes or for
emergency evacuation.
An emergency button or switch wired across 38 can be operated from
a predetermined location such as a telephone switchboard, security
office, or other supervised location for triggering the evacuating
system in case of bomb threat, etc.
While the preferred form of the invention disclosed herein provides
for location of the light emitting signal means and the sound
emitting signaling means close together, in fact in the same
housing, it is not essential that they be so closely mounted so
long as they are associated closely enough to appear to indicate a
definite association and to be regarded as indicating the same exit
opening.
An advantage of the location of the housing 19 which contains the
continuously lighted lamp or lamps in such position that light from
the inside of the central compartment shines through the bottom
openings 23 onto the threshold of the exit is that thereby
compliance with the general safety requirements for continuous
illumination of the of the doorway of a fire exit is effected.
* * * * *