U.S. patent number 3,885,144 [Application Number 05/443,420] was granted by the patent office on 1975-05-20 for aisle light.
This patent grant is currently assigned to American Seating Company. Invention is credited to Robert E. Lewis, Robert S. Walworth.
United States Patent |
3,885,144 |
Lewis , et al. |
May 20, 1975 |
Aisle light
Abstract
A shatterproof light diffusion plate is mounted to the riser of
a stair with the upper edge of the plate immediately adjacent the
forward edge of the tread. A source of light illuminates the
diffusion plate, and transmits light to the upper edge to also
illuminate it, thereby providing a visible line marking the front
edge of the tread for guiding traffic up and down the aisle and
defining tread depth.
Inventors: |
Lewis; Robert E. (Champaign,
IL), Walworth; Robert S. (Champaign, IL) |
Assignee: |
American Seating Company (Grand
Rapids, MI)
|
Family
ID: |
23760741 |
Appl.
No.: |
05/443,420 |
Filed: |
February 19, 1974 |
Current U.S.
Class: |
362/632; 52/28;
362/146 |
Current CPC
Class: |
F21V
33/006 (20130101) |
Current International
Class: |
F21V
33/00 (20060101); F21v 033/00 () |
Field of
Search: |
;240/1EL,2R,2B,7.3,8.26,46.45,151 ;52/28,182 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Braun; Fred L.
Attorney, Agent or Firm: Dawson, Tilton, Fallon &
Lungmus
Claims
We claim:
1. An aisle light for providing guidance illumination for a step
having a tread and a riser comprising: a light-piping shatterproof
plastic faceplate panel extending substantially the entire height
of said riser and having an upper edge immediately adjacent and
parallel to the upper edge of said riser, the forward part of said
panel edge being beveled, the outer surface of said faceplate being
stippled; means for securing said faceplate to said riser; a source
of light carried by said riser and radiating light into the body of
said faceplate panel whereby said light travels through said panel
and illuminates said upper edge thereof, said light source
including a low-voltage, shock-resistant, replaceable bulb; and a
metal cover strip having a height less than the height of said
panel and extending across said panel and located directly in front
of said bulb to shield the filament of said bulb from direct
vision.
2. The apparatus of claim 1 wherein said faceplate panel comprises
transparent rigid plastic material scored along horizontal lines on
the rear surface and defines an aperture, said low-voltage bulb
extending bodily into said aperture for facilitating radiation of
light into the body of said faceplate panel.
3. The apparatus of claim 2 wherein said riser includes a
horizontally elongated channel housing providing a continuous
horizontal slot and wherein said source of light is removably
secured to said riser and extends within said housing, said housing
serving as an electrical conduit for feed wires to said source.
4. The apparatus of claim 3 wherein said securing means includes
fastener means extending through said cover strip and said
faceplate panel into said channel housing; and plate means
receiving said fastener means within said channel housing and
reacting thereagainst to hold said cover plate and said faceplate
panel to said riser.
5. In a telescopic seating system having a plurality of row
sections adapted to be selectively moved between an expanded use
position and a retracted storage position, said row sections
providing an aisle for access, the improvement comprising: an aisle
light associated with each one of a plurality of risers in said
aisle, said aisle light including a light-piping shatterproof
plastic faceplate panel extending substantially the entire height
of said riser having an upper edge immediately adjacent and
parallel to the upper edge of said riser, the forward part of said
panel edge being beveled; means for securing said faceplate to said
riser; a source of light carried by said riser and radiating light
into the body of said faceplate panel whereby said light travels
through said panel and illuminates said upper edge thereof, said
light source including a low-voltage, shock-resistant, replaceable
bulb; and a metal cover strip having a height less than the height
of said panel and extending across said panel and located directly
in front of said bulb to shield the filament of said bulb from
direct vision; said system further including a step-down
transformer having its primary connected to a 60-hertz source of
electricity; a plurality of said row sections including a junction
box mounted thereto; wires coupling electricity from said junction
box to the lights associated with that section; and flexible
conductor cord means connecting the junction box of its associated
row section with the junction box of an adjacent row section.
Description
BACKGROUND AND SUMMARY
The present invention relates to a system for providing aisle
lighting for guiding traffic up and down an aisle. The invention is
particularly useful for lighting the aisles of seating systems such
as the telescoping chair platforms used in auditoriums and sports
arenas.
Aisle lights are known, for example, in theatres, wherein the
lights are mounted to the end standards of fixed seating. However,
it has been difficult to provide a reliable aisle lighting system
for telescoping seating systems because of the rugged conditions of
use and because the aisle light must not provide an obstruction
either to traffic moving up and down the aisle or to traffic
entering the aisle from a seating row.
The present invention includes a shatterproof light diffusion
plate, preferably made from a plastic such as Plexiglas, which is
secured to the riser of a stair with the upper edge of the
diffusion plate immediately adjacent the forward edge of the tread
of the stair. A shock-resistant light is placed in an aperture in
the diffusion plate to radiate light into the plate. The light is
transmitted through and confined by the diffusion plate to
illuminate the edge of it, thereby providing a visible line at the
upper edge of the plate which marks the front edge of the tread and
guides traffic up and down the aisle. The upper edge of the
diffusion plate may be beveled in order to avoid catching the heel
of a person going down the aisle, and this beveled edge further
provides an illuminated line more visible to persons moving up the
aisle.
A metal strip having a height greater than the light bulb aperture
in the diffusion plate extends horizontally across the front of the
diffusion plate and covers the light bulb in order to hide the
bright spot that would otherwise be caused by the filament. The
strip also provides a means for securing the diffusion plate to the
riser of the stair.
In a preferred embodiment wherein the lighting system equips a
telescoping seating system (including either bleachers or chair
platforms), the electrical wiring is provided in modules, with the
110-volt power being fed to a step-down transformer which provides
a low voltage output voltage. The individual lamps are
shock-resistant and designed to operate low voltage, such as 6.3
volts. The power is fed via flexible low voltage lines from the
transformer to a junction box associated with and mounted to each
row in the seating system. Power is fed from the junction box
through a slot provided in a channel in the riser to the light
bulbs. Each platform section may be provided with a half step, and
a single junction box would feed an aisle light both at the half
step and at the upper portion of the riser.
Other features and advantages will be apparent to persons skilled
in the art from the following detailed description of a preferred
embodiment accompanied by the attached drawing wherein identical
reference numerals will refer to like parts in the various
views.
THE DRAWING
FIG. 1 is an upper perspective view of a telescoping platform
system incorporating the present invention;
FIG. 2 is a cross sectional view taken through the center of one of
the aisle lights of FIG. 1 as indicated by the sight line 2--2;
FIG. 3 is a transverse cross sectional view taken through the same
aisle light at the location indicated by sight line 3--3; and
FIG. 4 is a side cross-sectional view illustrating the electrical
distribution system for a structure having aisle lights only at the
half steps.
DETAILED DESCRIPTION
Referring first to FIG. 1, reference numeral 10 generally
designates a telescoping platform system which may be of the type
disclosed in the copending, co-owned application of Vance, et al,
entitled "System for Mounting Articles to Telescopic Structures",
Ser. No. 349,959, filed Apr. 11, 1973, Ser. No. 349,959, Ser. No.
349,959. What is shown in FIG. 1, of course, is merely the central
portion of a telescoping system--namely, an aisle.
In systems of this type, a plurality of row sections generally
designated 11, 12 and 13 are adapted by means of suitable
supporting structure to be either extended, as shown in FIG. 1, to
the use position or telescopically retracted for storage. Each of
the row sections is similar so that only one need be referred to
for a complete understanding of the invention. Referring then to
the platform section 12, it includes a platform forming a tread 14,
a rear riser portion 15, and a forward riser or "nose" portion 16.
A complete riser for an extended section of the illustrated
embodiment includes the forward riser portion of an upper fow,
designated 16, and the rear riser portion of the next lower row
designated 15. Thus, the vertical distance between adjacent
platforms 14 may be too high for a convenient step, and a half step
17 may be included for each row section. There are, of course,
chairs or benches provided to either side of the aisle if it is a
center aisle, although for purposes of the present invention, it
will readily be appreciated that the lighting system may be
accommodated to aisles regardless of their location and it is
useful for aisle lighting for stationary as well as for telescopic
seating systems.
The half step 17 also includes a riser portion 18 and an upper
tread portion 19. The forward riser 18 of the half step 17 and the
riser nose 16 of each row section are each provided with an aisle
light generally designated respectively by reference numerals 20
and 21 respectively- These aisle lights are constructed according
to the present invention. Because the aisle lights 20, 21 are
similar in structure, only one will be disclosed in further
detail.
Turning then to FIGS. 2 and 3, the forward riser portion 16 of the
platform section 12 is provided with a continuous, horizontally
elongated channel housing 23 which defines a continuous forward
slot 24. A bulb socket 26 is received within the channel housing
23, and mounted to the depending lips defining the slot 24 by means
of first and second spring steel tinnermans 27 and 28. The socket
26 carries a forward-removable shock resistant bulb 29, the
filament of which is connected between the conductive terminals 30,
31. Additional details concerning the construction of the riser
portion 16 may be obtained from the above-identified copending
application.
A light-diffusing faceplate 34 is mounted to the riser portion 16
in a manner best seen in FIG. 3. A metal strip 35 extends
horizontally across the width of the diffusion plate 34 and it is
located directly in front of the slot 24. A pair of threaded bolts
36 extend through the light cover 35 and the diffusion plate 34,
and they are received in rectangular plates, one of which is shown
in FIG. 3 and designated by reference numeral 37, which serve the
function of nuts. As best seen in FIG. 1, the bolts 36 are located
toward the sides of the aisle light 21.
Returning now to FIG. 2, the center of the diffusion plate 34 is
provided with an aperture 39 into which the lamp 29 extends. Direct
view of the filament of the lamp 29 is prevented because the light
cover 35 extends over it. Light from the lamp 29 is radiated
laterally, and it is transmitted through the body of the diffusion
plate 34. The light cover 35 is preferably aluminum or other metal
to enhance the reflection of light into the diffusion plate.
The diffusion plate 34 includes an upper edge 40, a lower edge 41,
and side edges, all of which are roughened; and a front surface 42
which may be stippled or of rough texture. This stippling of the
front surface has been found to be of convenience in viewing the
aisle light by a person approaching the aisle from either side of
the row in which it is located because it casts a flow which is
more visible from the side. The diffusion plate 34 is preferably
made of Plexiglas. In order to provide greater illumination from
different angles, particularly for a person in traffic going up the
aisle, the upper and lower surfaces 40, 41 are beveled as at 45, 46
respectively. Greater visibility can be achieved, if desired, by
forming horizontal grooves as at 47 across the rear surface of the
diffusion plate 34.
Light entering the diffusion plate 34 travels in a vertical plane
i.e., the light is "piped" to the edges of the plate 34, confined
by the diffusion plate; and it illuminates the horizontal upper
edge 40 of the diffusion plate as well as the beveled upper edge
45. It will be observed that the upper edge 40 is immediately
adjacent the upper edge of the riser 16, and thereby provides a
luminous line to indicate to a person moving down the stairs where
the edge of the platform 14 is located. The beveled edge 45 of the
diffusion plate 34, as mentioned, defines a similar luminous line
marking the upper edge of the riser 16 to persons moving up the
aisle; and it serves the dual function of preventing the catching
of heels of persons moving in down traffic.
For persons entering the aisle from the side, as already mentioned,
the front stippled surface 42 of the diffusion plate casts an
adequately visible glow.
Turning now to FIG. 4, there is shown a preferred embodiment of the
electrical distribution system for the aisle lights shown in FIGS.
1-3. A primary junction box (not shown) may be secured in any
suitable location beneath the structure being lighted, preferably
in a location wherein it remains stationary if the structure being
lighted is a telescopic system. A step-down transformer, having a
primary winding adapted to be connected to a conventional 60 Hz.,
110 v. grounded wall outlet is located at the primary distribution
box.
The secondary winding of the transformer has a voltage of 6.3 v.
and is connected to two outlet wires contained in a flexible,
insulated distribution cord 54. The cord 54 is shown to be routed
from an upper row section 13a; and in the embodiment illustrated in
FIG. 4, only the half steps are provided with aisle lights, as at
14b and 15b for the row sections 14a and 15a respectively.
Located at the rear of each of the row sections 14a, 15a is as
junction box designated respectively 55 and 56. The distribution
cord 54 is provided with a plug 57 of the twist type--that is, it
is provided with prongs having feet so that it may be inserted into
a receptacle mounted to the cover plate 58 of the junction box 55
and turned to lock in place.
Within the junction box 55 connections are made to a second
distribution cord 59 coupling power to the junction box 56 by means
of a second twist lock 60, and in addition, connections are made to
a pair of wires generally designated 62 which are connected to the
terminals of the low-voltage, shock-resistant light 63 forming part
of an aisle light generally designated 65. The aisle light 65
includes a faceplate 67 similar to the previously discussed
faceplate 34 which is held in place by means of a metal strip 68
covering the lamp which is a part of the light 63. In this
embodiment, the half-step 14b includes a forward vertical flange 70
to which the faceplate 67 is directly secured by means of screws
holding the faceplate and the metal strip 68 in place. The light 63
is mounted to the rear of the flange 70 adjacent an aperture so
that the lamp again extends into the aperture.
Additional wires such as those shown at 62 may extend from the
junction box 55 for as many lamps as are required for the row
section 14a. Additionally, if aisle lights were provided at the
forward nose portion of the row section 14a, they would be routed
from the junction box 55 because this junction box travels with
that row section. In other words, any aisle lights that may be
included in the forward nose portion of the upper row section 13a
would not be energized from the junction box 55, but rather, from
the junction box associated with that particular row section which
is not shown in FIG. 4.
There are a number of advantages in this type of distribution
system. One advantage from the viewpoint of safety is that the only
power coupled from the main junction box is at low voltage. The
shockproof lamps 29 are designed to operate on 6.3 volts, one such
lamp commercially available is manufactured by Industrial Devices,
Inc. of Edgewater, New Jersey, Model No. B 3060 D-3. Not only is
this lamp designed for shock resistance so as to withstand the
rugged use conditions of the preferred embodiment; but the bulb is
removable from the socket of the light and easily replaced from the
front. In other words, only the fastening screws 36 need be removed
in order to replace a burned-out bulb.
Another advantage of the electrical distribution system just
described is that it is modular and capable of being extended to
meet any practical system.
Having thus described in detail a preferred embodiment of the
present invention, persons skilled in the art will be able to
modify certain of the structure which has been disclosed and to
substitute equivalent elements for those illustrated while
continuing to practice the principle of the invention; and it is,
therefore, intended that all such modifications and substitutions
be covered as they are embraced within the spirit and scope of the
appended claims.
* * * * *