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Патент USA US2409408

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Oct. 15, 1946.
Filed May 11, 1943 >
2 Sheets-Sheet l
Oct. 15, 1946.
Filed May 11, 1945
r 2 Sheets-Sheet 2
WW Emma?“
Patented Oct. 15, 1946
Wagn Trautner, Hamilton, Ohio, assignor‘ to The
K-D Lamp Company, Cincinnati, Ohio, a cor-.
notation of Ohio
Application May 11, 1943, Serial No. 486,537
2 Claims. (Cl. 240-41)
My invention relates to signal lamps 0r lights
especially for heavy-duty vehicles. These sig
nals may be of full illuminating intensity for
Figure 1 is a front elevational view of an ex
ordinary use, or they may be or “blackout” con
struction as hereinafter described in certain em
For military use, on tanks, trucks and other
emplary vehicle tail signal.
Figure 2 is a vertical section thereof.
Figure 3 is a sectional view of a can for an~
other type of stop signal or taillight.
Figure 4 is ‘an elevational view of one type of
incandescent bulb with a mounting ?xture
heavy duty vehicles, it has been found best to
provide a sealed construction. This means that
Figure 5 is an end elevation of the structure
for each incandescent bulb a can is provided. At 10 shown in Figure 4,
one end of the can there is a sealed closure em
Figure 6 is a side view of another type of in
bodying a lens or transluscent cover (and in
candescent bulb with a mounting ?xture in place
blackout constructions, certain ?lters and masks
as well). The bulb proper is located within the
Figure 7 is an end View of ‘a structure shown
can, with its base projecting through aperio 15 in Figure 6.
ration in the can‘ end remote from the lens. The
Figure 8 is a perspective view of a can from
base is soldered or brazed to the can, thus pro
the rear.
viding a sealed construction whichobviates much
Referring ?rst to Figures 1 and 2, wherein I
of the difficulties arising from dust, mud and
have shown an exemplary signal device for the
water in this part of the apparatus. In most 20 rear of a tank, truck or other vehicle, l repre
tail-signal assemblies two or more of these cans
sents a cup-shaped body, having a cooperating
are located in a housing which contains the
cover member, 2. At the back or bottom of the
sockets for the bulb bases, and which has a cover
housing I, there is a stamping 3, shaped as shown,
with perforations or cutouts to disclose‘ the lenses,
and fastened to the bottom in any suitable way.
or desired portions thereof.
A pair of socket members, 4 and 5. extend through
An obvious disadvantage of ‘the sealed can. con_
perforations in the bottom of the housing I, and
struction is that when a bulb burns out Or breaks
in the‘ stamping 3, and may be held in place in
the whole can must be discarded and another
any suitable fashion. I have shown peripheral
one provided. This means that the changing of
ribs ‘6, about mid-way of the length of the socket
of a bulb involves the changing of attendant 30 tubes, with these ribs engaging and held tightly
parts which may and in most instances do cost
between the bottom of the housing I, and ‘the
more than the bulb. This is uneconomical. Also,
stamping 3. A mounting belt, or other means by
the maintenance of a reserve supply of bulbs
which the signal may be attached to a vehicle, is
means the maintenance of a reserve supply of,
shown at ‘I. It will be understood thatfor'mo'unt
complete cans, involving problems of bulk, weight 35 ing purposes, a suitable bracket may be employed
and space.
and may have provision for angular adjustment
An object of my invention is the provision of
of the signal structure.
a structure in which every advantage of the
Within the housing I, I have shown a pair
sealed can is realized, but in which bulbs may
of cans, 8 and 9, the general shape of which may
be replaced without the necessity of replacing 40 be anything appropriate to the particular ser
the combination of can, seal, lens, ?lter and
vice which the signal device is to perform. A
mask. ‘
common shape for a stop and tail-signal device
Another object of my invention is the provi
is generally shown in Figure 8. Hitherto, as al
sion of a structure such as the one hereinabove
ready indicated, it-ha's been the practice ‘to place
characterized, in which certain advantages of 45 incandescent bulbs. in these cans with their bases
orientation may be obtained, hitherto imper
extending through perforations in and ‘soldered
fectly obtainable, or not obtainable at all.
to the can bottoms. My improvement in this
These, and other objects of my invention which
structure will hereinafter be outlined.
will be set forth hereinafter or will be apparent
At the other end of the cans there is a sealed
to one skilled in the art upon reading these 50 light emitting structure. The can end is flanged
or turned outwardly as at In. For blackout pur
speci?cations, I accomplish by that certain con
poses the light emitting structure may comprise
struction and arrangement of parts of which I
several parts. First, there may be a front lens
shall now describe the aforesaid exemplary em
or translucent element indicated at II. Behind
bodiments. Reference is made to the drawings
this there may be a cup-shaped member I2, hav
forming part hereof and in which:
ing a peripheral ?ange l3. The cup-shaped mem
ber I2, is usually made of a tinted translucent
but this is not usually necessary. The point of
the protuberance 26 is the giving of a tactile indi
cation whereby the cover may be readily applied
material, so that it may act as a ?lter, or, if
desired, a separate ?lter may be employed. In
in the proper orientation, so that the screw holes
in which screws 24 and 25 engage may be readily
located by the operator, and so that where the
interengagement of lens protuberances and per
the speci?c exemplary embodiment, those por
tions of the member l2 through which light is
to pass are recessed, as at, I 4. Then, in the process
of further manufacture, protective structures are
placed in these recesses, and the remainder of
the hollow interior of the member 12 is sprayed
with some opaque coating substance, usually
the construction, such interengagement may be
readily obtained. It will, of course, be understood
black in color. The recesses M are left uncoated
by this operation. The black coating serves as
a mask and renders unnecessary the use of sepa
tain suitable connector plugs. These have not
been illustrated; but the sockets, as in Figure 2,
show locking notches for these connector mem
forations in the cover member is a feature of
that the socket members 4 and 5 will in use con
rate mask plates and the like, though these may 15 bers.
be employed if desired.
The general disadvantages of passing the lamp
In the formation of a sealed structure, an an
bases through holes in the can bottoms and sol
nular sealing ring I5, U-shaped in cross-section
dering the bases to the bottoms have been pointed
and made of rubber or any other suitable sealing
out above. There are also other disadvantages.
substance is placed on the ?ange I3 of the mem 20 One of these is the difficulty of securing proper
ber I2. This sealing ring rests on the ?ange ll}
orientation of the bulbs in the cans. In general,
two conditions give rise to a need for orienta
of the can 3, and the lens II, in turn, rests on
the sealing ring [5. A collar [6, having an in
tion. Certain tail signals require double ?lament
turned ?ange at one side is slipped over this
bulbs which have, in addition to a base sleeve,
assembly, and a ?ange is rolled or turned over
two end contact members. The need for orienta
at its other side, so as to form a structure in which
tion here is obvious; but it is also relatively easy
one of the ?anges rests against the lens H, and
to obtain, because the contact points on the base
the other engages the ?ange E0 of the can, clamp
are outside the can and give visual indication of
ing these elements together sufficiently tightly
to form a seal.
orientation during assembly. But in heavy-duty
30 vehicles subject to much jarring and jolting it
It will be understood that the structure just
described may be varied to suit the nature of the
service which the signaling device is to perform.
has been found that the orientation of the incan
descent ?laments in illuminating bulbs has a pro
nounced effect on bulb life where the bulbs are
Figures 1 and 2 illustrate a blackout structure, '
horizontally disposed. A vertical disposition of
the ?laments is frequently conducive to shorting,
whereby the bulbs burn out; and it has been found
that the life expectancy of bulbs is greatly pro
longed by disposing the ?laments in a horizontal
comprising a blackout stop signal which will be
intermittent in its action, and a blackout tail
signal. However, for stop, directional or tail sig
nals or other signal uses requiring full intensity
position. Where bulbs are inserted in and their
of the illumination, mask structures and the like
may be eliminated. In Figure 3 I have shown a 40 bases soldered to cans, such orientation is ex
Fresnel prism lens H, which may or may not be
tremely di?icult to obtain, for the reason that
tinted. In this structure the lens merely lies
the bulb is located inside the can and away from
against a sealing ring l8, which, in turn, lies
against the can ?ange it, while the collar struc
ture l6 clamps the “parts together in the way
hereinabove described.
In blackout structures, where the angle of illu
mination is important either to prevent the lights
easy observation, while the desired orientation,
even if initially obtained, can be destroyed by
slight rotation of the bulb. In the practice of my
invention I not only provide a sealed structure
from which the bulbs can be individually removed
and in which they may be replaced, but I also
make provision for obtaining the desired orienta
from being seen from the air or to provide a visual
indication of the angle at which the vehicle is ' tion structurally and in operation.
being observed, less than the full area of the front
In the end of the can 8 of Figure 8, I provide
lens H is normally utilized. Where this is the
a perforation large enough to accept, not the
base of the bulb, but the enlarged glass portion.
‘case, the utilizable portion of the front lens is
generally brought outwardly, as at l9 (Figure 2).
The edges of this perforation are preferably in
The cover member 2 is a cup-shaped member 55 wardly turned, as at 21. Also about the periphery
which in the case of blackout signals usually will
of the perforation and spaced from the edge of
be formed with depressions 20 and 2! in it over
substantially the areas of the can ends. The de
pressed portions 20 and 2| will then have cutouts
22 and 23 in them to disclose the lenses as shown,
or more restricted cutouts to disclose the pro
tuberances l9 on the lenses of the cans. When
the cans are placed in position with the bases of
the bulbs in the sockets 4 and 5, they are clamped
in position by means of the cover 2 which, in turn,
is held in place by screws 24 and 25, threading
into brackets (not shown) attached to the hous
ing I. Under the pressure exerted by the screws,
the depressed portions 20 and 2| of the cover 2
engage the can ends and push them to the rear.
As an aid to assembly under conditions of dark
ness, I prefer to provide my cover with an orient
ing protuberance or rib 26 at one side. The hous
it, I prefer to provide an annular bead or depres
sion 28. Also, at one point on the edge of the
perforation, I prefer to provide an orienting notch
29. This, of course, could be a protuberance and
still function in the manner hereinafter set forth;
but in the usual procedure of turning inwardly
the edges of the can bottom about the perfora
tion therein to form the ?ange 21, it is more con
venient to form the orienting con?guration 29
as a further depression.
The base of the bulb is soldered or otherwise
sealed to a ?xture 39. This will hereinafter be
more fully described. It has a part shaped to
enter the perforation in the can bottom and an
ing I may be provided with a mating protuber
outlying ?ange between which and the can bot
tom there will be located a sealing ring 3|. When
the cans are assembled in the signal structure,
and the cover 2 is tightened up as hereinbefore
ance, enforcing a proper positioning of the cover;
described, it will be evident that the ?xtures 30
initely. For heavy-duty vehicles the lenses, ?l
Where a large bulb is required, it may frequently
be necessary to clecenter the bulb with respect
to the ?xture. This is illustrated in Figures 4
and 5, where the ?xture 3lJ—a designed to accept
the base ill of the bulb 4D has the cylindrical part
32--a, and a similar con?guration of the inturned
parts, excepting that the perforation which ac
cepts the‘base 4| is decentered, as shown. Other
ters and the like are usually made of translucent
wise the structure is the same, except for a neces
and the sealing rings 3| effectively seal the can
Yet when the cans are removed from the
signal structure, the bulbs and their ?xtures may
be readily removed, and new ones placed in the
same cans. For bulb replacement there need only
be stocked a set of bulbs and ?xtures, since the
cans are capable of remaining in service indef
plastic not subject to breakage.
Figures 6 and '7 illustrate one type of bulb and
?xture assembly. The ?xture itself is a stamp
ing 30, having a short cylindrical body 32, at one
end of which is the annular ?ange 33. At the
other end of the body 32, there is an inturned
part 34, providing a hole to accept the base 35
of the bulb. The inner end of the part 34 is
slightly outwardly turned, as at 36. This has two
purposes. For one thing, it provides a channel in
which solder may be located, as at 31, and, by dis
posing the metal edge of the ?xture somewhat
outwardly from the base of the lamp itself, it
insures that the ?xture will be contacted by the
ends of the sockets 4 or 5, when the signaling
structure is clamped together. This will be clear 25
in Figure 2; and it provides positive abutting
sarily enlarged size of the ?xture 3|l——a. In
Figure 5 I have shown the base 4| as having
two contact points 42 and 43. The orientation
of these points with respect to the orienting pro
tuberances 38 during the operation of soldering
will be clear from the description which has gone
before. Orientation is factilitated because the
bulbs and ?laments can at all times be readily
Modi?cations maybe made in my invention
without departing from the spirit of it. Having
thus described my invention in certain exemplary
embodiments, what I claim as new and desire to
secure by Letters Patent is:
1. In an illuminating device, a can, a lens hav
ing a sealed relationship with one end of the can,
the other end of the can being closed except for a
contact without undue precision in the parts.
At one side of the cylindrical portion 32, as
perforation in said end, said perforation being of
held by the pins in a soldering machine. The bulb
base 35 is inserted in the ?xture, ‘as will be clear
from Figure 6, and the ?xture is then placed in
bulb within said can, and the parts held together
by pressure exerted respectively on the can and
the ?xture, the edges of said can end being in
turned about said perforation to form a substan
tially cylindrical recess, said ?xture having a
cylindrical portion ?tting in said recess, and an
a size to accept the bulb of an incandescent lamp,
an incandescent lamp having a bulb and base,
best seen in Figure 7, I form an orienting protub
erance 38, which co-acts with the orienting groove 30 and a ?xture on said base and sealed thereto, said
?xture having a portion for co-acting with said
29 in the perforation in the can body. The ?xture
can to effect a sealed connection when said ?x
may be provided with certain peripheralnotches
ture and lamp are in place on said can with the
39 in the ?ange 33, so that the ?xture may be
the soldering machine. The bulb ?lament or
?lament can be exactly oriented with respect to
the protuberance 38. Solder and flux may be
placed in the channel, as at 31, and the soldering 40 outlying peripheral ?ange substantially paral
leling the can end, the walls of said cylindrical
machine, by applying heat to the flange 33, will
recess having a groove, and the cylindrical part
cause the solder and flux to be melted (through
of said ?xture having a mating ridge, the walls of
‘ heat conduction in the body of the ?xture) to
the said cylindrical portion of the ?xture being
effect the necessary seal between the bulb base
and the ?xture. When the solder has set, the 45 inturned at one end to provide a recess for the ac
ceptance of the base of said lamp, and then
bulb and ?xture can be removed from the solder
slightly outturned to provide about said base a
ing machine, and after cooling, the sealing ring
groove for sealing substance and an abutment
3| may be applied to and cemented against the
whereby pressure may be exerted on said ?xture
?xture ?ange 33. The ring 3| may be of rubber
or similar material but can be constructed of such 50 by a socket in which said base is placed.
2. The structure claimed in claim 1 in combina
substances as asphalted felt or the like.
tion with a housing including a body and a cover,
As indicated, the hole in the can bottom, and
a socket in said body, means on the cover for
by consequence the cylindrical portion 32 of the
engaging the can, and means for drawing the
?xture, must be somewhat larger than the diam
eter of the bulb employed. In some types 55 cover to the body whereby to clamp the ?xture
against the can by means of said socket.
of signaling structures the bulb base cannot be
centered in the direction of the width of the can.
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