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Патент USA US2122657

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July 5, 1938.
w. B. PIPER
2,122,657
ILLUMINATED SIGN
Filed May 14, 1935
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William ?j’z'per;
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Patented July 5, 1938
2,122,657
UNITED STATES
PATENT OFFICE‘
2,122,657
ILLUMINATED SIGN
William B. Piper, Memphis, Tenn., assignor to
Gasmold Sign Corporation, Memphis, Tenn.,
a corporation of Tennessee
Application May 14, 1935, Serial No. 21,464
7 Claims. (Cl. 176—14)
My invention relates to an'illuminated molded
glass sign, of the type using neon and similar
electrically energized bright colored gases.
In my Reissue Patent #19,417, granted Janu
5 ary 8, 1935, and in my Patent No. 2,027,320, dated
January 7, 1936, I have disclosed a sign of this
type in which‘v .a hermetically sealed channel,
for containing the luminous gas, such as neon,
molded to the outline of a character, is formed
10 between a front and back portion of glass, fused
together at their contacting faces. In order to
electrically energize the gas in the channel, elec
trodes connected with a high frequency current
are inserted at the inlet and" outlet openings of
the channel.
‘
It has been heretofore the practice to locate
these electrodes directly at the inlet and outlet
openings and this results in the production of
a bright spot at these points.
20
One of the objects is to so locate the electrodes
as to avoid the presence of a bright spot in the
letter adjacent the inlet and outlet openings.
Another object is to provide a satisfactory way
of applying the electrodes to the sign.
25
With these and other objects in view, my in
vention consists in certain novel and'peculia-r
features of construction and combination of
parts as will be more fully illustrated in the
510
drawing and described in the speci?cation and
more particularly pointed out in the appended
claims.
.
Referring to the drawing for a more complete
disclosure,
Fig. 1 is a' front elevation of a letter C showing
the location of the electrodes,
Fig. 2 is an elevation of a letter C showing a
modi?ed form in the location of the electrodes,
Fig. 3 is a fragmentary horizontal section on
the line :):—:L' of Fig. 1,
Fig. 4 is a fragmentary vertical section on
the line y-—y of Fig. 1,
'
Fig. '5 is a fragmentary horizontal section of
one form for mounting the electrode tube in the
back plate,
'
'
Figs. 6, 'Z and 8 are similar sections of modi?ed
forms for mounting the electrode tubes in the
' back plate,
opposite each other.
If the electrodes are placed directly behind
the openings 6, the letter will show a. bright spot
at these points, brighter than the luminous gas
in the remaining portion of the letter. By off
setting the electrodes 1 to one side, a short
distance away from the inlet and outlet openings
6, then the whole length of the channel portion
2 will be uniformly illuminated. It will be under
stood that, as heretofore, the portion of the front
plate, other than the raised letter portion that
islto be illuminated, is covered with any suitable
opaque material and accordingly the bright spots
at the electrodes will not be seen. The distance
of the electrodes from the inlet and outlet open
ings will depend on the size of the illuminated
character but in the average size sign will be of
the order of about two inches. By molding the
channels 5 in the back plate, a cheap and satis
factory construction is thereby produced. While 30
I have shown my invention in connection with
a letter C, the same principles of construction
are applicable to any other type of character or
letter where the same problem is involved.
With the form shown in Fig. 1, there are vari 35
ous ways of applying the electrodes, as more par
ticularly shown in Figs. 3 to 8 inclusive.
With the form shown in Fig. 2, the electrode
is applied as shown in Fig. 9. In that case, the
electrodes 1 are located in the channels 5, before
assembling the front and back plates. The lead
Wire 8 connected to the electrode ‘I passes be
tween the front and back plates and out through
an opening 9 in the back plate. This construc
tion obviates the usual electrode projecting por- .
tions on the back of the back plate.
In the form shown in Fig. 3, the electrode tube
Fig. 9 is a horizontal fragmentary section on
the line e—2’of Fig. 2.
A letter, such as C, is formed in’ the front
.glass plate ! by molding or pressing into it, the
hollow open channel 2 behind the raised letter
portion 3.
openings 6, which will be formed when the front
plate I and back plate 3 are in proper juxta
position. It will be understood that the front
plate 1 and the back plate 3 are fused together
along their contacting faces, so that the open
channel portions 2 and 5 when their open sides
are against the ?at portions of the plates 4 and
I respectively, will form hermetically sealed
gas channels, the openings 6 being formed where
the open portions of the channels 2 and 5 are 10
The back glass plate 4 has pressed
into it the open channels 5 which connect with
the channel 2 at each end thereof through the
10 is a plain glass tube that is molded at its lower
end into the raised portion ll of the back plate
4 formed by the channel 5, at the time the back 1
plate is being molded into shape. The tube 10 is
provided with the tubulation 12, through which
the air is exhausted in the channel 2 and the
luminous gas introduced, after which the tube is
sealed by pinching it tight while hot and plastic. 55
2
2,122,657
I The glass tube Ill is closed at its upper end by the
glass plate l3 welded to the top of the tube and
through which passes the conducting wire l4, held
and sealed therein by the internal pinch l5.
In the form shown in Fig. 5, the lower end of
said openings, an electrically conductive gas in‘.
the said channels, electrodes in the electrode:
channels, spaced from and offset to one side from‘
the said openings to avoid bright spots in the‘
character at the said openings, when the current’
the glass tube In is flared at It at its lower end is on and the character is illuminated, conduct
ing wires connected to the electrodes and located
and molded into the back plate in the same man
ner as the form shown in Fig. 3. The tubulation between the contacting faces of the front and
l2 in this form may be made as a part of the top back panel and apertures in the back panel 1O
10 plate 13 rather than as a part of the glass tube i through which the conducting wires pass.
5. A molded glass sign comprising a back glass
iii as in Fig. 3.
In theform shown in Fig. 6, the lower end of i panel, a molded glass character panel provided,
the glass tube Ill is ?ared at I6 as in Fig. 5 but with a channel shaped to the outline of a char
the upper end is pinched at 11, while hot and acter, with the open part of the channel being
15 plastic, around the conducting wire 14.
~
In the form shown in Fig. 7 the glass tube [0
is molded integral with the back plate and a cap
l3 fused to the top thereof as in Fig. 3.
In the form shown in Fig. 8, the glass tubel?
20 is made in two parts l8 and i9 that are welded
together at 2B, the lower part being molded with
the back plate. 'The upper part is formed of a
glass tube the top and sides being made of one
piece, the tubulation l2 being carried thereby
25 and the electrical conductor wire ' H! passing
through a sealedaperture in the top, the part 59
and the electrode carried thereby being assembled
before welding along the line 20. When it is not
feasible to have the tubulation carried by the
'30 glass electrode tube, then it may be carried by
the back plate, and located as at 2!, Fig. 2.
What I claim is:
1. A molded glass sign comprising a front and
back panel fused together along their contacting
disposed against the back panel, an electrically
conductive gas in ther'channel, the panels being
fused together into a unit, inlet and outlet open
ings for the flow of electric current communicat
ing with said passage, open channels molded in
the said back panel and disposed against the char 20
acter panel to provide a second channel, the near
ends of the second channel being connected with
the inlet and outlet openings, electrodes spaced
from the inlet and outlet openings and offset to
one side from the illuminated visible portion of.
the character, and located at the outer ends ofv
the second channel, to avoid bright spots in the‘
character at the said openings,‘ when the current
is on and the character is illuminated and opaque
305
material covering the second channels.
6. A molded glass sign comprising two glass1
panels fused together at their contacting faces,
one of the panels being provided with a channel
molded to the outline of a character, the other
faces, a character channel molded in the front
panel, an electrically conductive gas in the chan
nel, and an electrode channel molded in the back
panel, an electrode in the electrode channel, and
a conducting wire connected to the electrode and
panel being provided with a second channel, the 35
and back panel.
2. A molded glass sign comprising a front and
back panel fused together along their contacting
being disposed ‘opposite each other to provide
open parts of the said channels being disposed in
part against the opposite panel to provide a her
metically sealed gas channel, an electrically con
ductive gas in the channel, a portion of the open
located between the contacting faces of the front ~ portions of the said ?rst and second channels 40
faces, a character channel molded in the front
panel, an electrically conductive gas in the chan
nel, and an electrode channel molded in the back
panel, an electrode in _the electrode channel, a
conducting wire connected to the electrode and
located between the contacting faces of the front
50 and back panel and an aperture in the back panel
through which the conducting wire passes.
3. A molded glass sign having a hermetically
sealed gas channel shaped to the outline of a
character, inlet and outlet openings for the ?ow»
55 of electric current communicating with the said
channel, electrode channels molded into the body
of the sign and communicating at one end with
said openings, an electrically conductive gas in
the said channels, electrodes in the electrode
60 channels, spaced from and offset to one side from
the said openings to avoid bright spots in the
character at the said openings, when the current
is on and the character is illuminated and con
ducting wires connected to the electrodes and
65 located between the contacting faces of the front
and back panel.
I
4. .Amolded glass sign having a hermetically
sealed gas channel shaped to the outline of a
character, inlet and outlet openings for the ?ow
70 of electric current communicating with the said
channel, electrode channels molded into the body
of the sign and communicating at one end with
inlet and outlet openings to the character chan
nel and electrodes in the second channel and
spaced from the inlet and outlet openings and
offset to one side from the illuminated visible por 45
tion of the character to avoid bright spots in the
character at the said openingskwhen the current
is on and the character is illuminated.
7. A molded glass sign comprising a back glass
panel, a molded glass character panel provided
with a channel shaped to the outline of a char
acter, with the open part of the channel being
disposed against the back panel, an electrically
conductive gas in the channel, thev panels being
fused together into a unit, inlet and outlet open 55
ings for the ?ow of electric current communi
cating with said channel, auxiliary open channels
molded in the said back panel and disposed
against the character panel, one end of the auxil
iary channels being connected with the inlet and
outlet openings, electrodes spaced from the inlet
and outlet openings and located at the other end
of the auxiliary channels and offset to one side
from the illuminated visible portion of the char
acter to avoid bright spots in the character at 65
the said openings, when the current is on and the
character is illuminated and glass electrode re
ceptacles molded as an integral part of and at the
other end of the auxiliary channels in the back
panel.
'
WILLIAM B. PIPER.
70
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