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Патент USA US3075178

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Jan’ 22,
L- ATKlN
LAMP HOLDER
Filed sePt- 9. 1959
2 Sheets-sheet 1
INVENTOR.
[Jo/v45, 47%,”
“Ma
477042”; y
Jan. 22, 1963
|_. ATKlN
3,075,168
LAMP HOLDER
Filed Sept. 9, 1959
‘is "M.
2 Sheets-Sheet 2
"In.
5"
57
BY
.
‘ice
1
3,075,163
LAMP HOLDER
Leonard Atkin, Spring?eld, N-BZ, assignor, by mesne as
signments, to Stonco Electric Froducts Company,
Kerrilworth, NJ, a corporation of New Jersey
Filed Sept. 9, 1959, Ser. No. 838,986
4 Qlaims. (Cl. 339-180)
B?'ldjhd
Patented Jan. 22, I963
2
also provided with four vanes 12, 13, I4, 15 which are di
rected radially of the closed end or base 16 of the cup at
intervals of 90 degrees, as may be seen in FIGURE 3, and
then extend to the vicinity of its mouth 17. The vanes
12, 13, 14, 15 are inclined with respect to the external
periphery of the cup and are perpendicular to and inter
rupt the aforesaid annular ribs 11, as may be seen in
FIGURES l and 2. A depending ear 18 including a
This invention relates generally to electric lamp holders
threaded hole 38 is also formed integrally with the said
and particularly to holders for electric lamps commonly 10 cup, the said ear communicating with the interior of
known as re?ector ?ood or spot lamps.
the cup by way of an aperture 18a provided in the wall
Heretofore, holders of the latter type have frequently
of the cup.
been formed as relatively deep, bell-shaped cups having
An important feature of the invention includes means
bottom portions to which lamp sockets were fastened.
adjustable exteriorly of the cup, such as the screws v19
Due to the inaccessibility of these bottom portions, it has 15 threadedly engaged in' oppositely disposed inclined vanes
{been di?icult and time consuming to assemble the sockets
12, 14. As may be seen in FIGURE 2, these vanes 12, 14
in many of the conventionally formed holders. More
are provided with bosses 20 which serve to seat the heads
over, in such holders it has been found desirable to sup
of said screws.
port the socket in combination with a helical spring ar
As may be best seen in FIGURES 4-, 5 and 6, these
ranged annularly of the socket. However, here again, 20 screws extend through the wall of the cup and emerge
in conventional holders it has been dif?cult to adjust the
therefrom at the base of grooves 21 provided on the
means for retaining such spring since the retaining means
internal periphery of said wall. As may also be seen in
is commonly adjustable and disposed entirely within the
FIGURES 4 through 8, inclusive, each of these grooves
aforesaid inaccessible portions of the holders.
extends from the inner surface 22 of the base of the cup
Furthermore, the lamp sockets heretofore employed in 25 to the vicinity of its mouth. In the vicinity of the base
such holders have made little or no allowance for proper
of the cup, each of the grooves is provided with a pair
seating of the lamp in the event of substantial mis
of walls 23, which project from the internal periphery of
alignment of the socket—a condition which was all too
the cup and which are provided with offset portions 24
probable by reason of the above-mentioned inaccessibility
and shoulders 245:. A detailed view of this structure may
30 be seen in FIGURE 8. The functions of these walls, o?i
of the area in which the socket was located.
To remedy these problems, it is an object of the present
set portions and shoulders will be hereinafter described.
invention to provide a lamp holder wherein the lamp
A cylindrical socket, generally designated by the nu
socket may be easily and quickly assembled and dis
meral 25, is also employed in the embodiment of the in‘
assembled.
vention herein described. This socket is preferably of
Another object of the invention is to provide such a 35 conventional design, having a porcelain body, an electri
lamp holder employing a cup portion formed as a single
cally conductive threaded metallic sleeve 2d, a contact
element and provided with simple means for retaining
member 27 and suitable electric terminals 28. At the
‘the socket therein.
base of the socket there is also provided a cross-bar 29
A further object of the invention is to provide exter
which is suitably secured to the socket, as by bolts 30
40
nally accessible means for adjustably retaining the afore
which extend through the cross-bar and the aforesaid
said socket within said cup portion.
porcelain body into threaded engagement with nuts 31.
A still further object of the invention is to provide an
Each end of the cross-bar projects radially of the socket
improved means for seating such a lamp in its socket
and has a pair of shoulders 32 and a projecting tongue 33
within the aforesaid cup portion.
disposed centrally between said shoulders.
Yet a further object of the invention is to provide a
These tongues are slidably received within the grooves
lamp holder which is simple in design and inexpensive to
21, where each of the tongues is disposed between one of
manufacture.
the pairs of walls 23 and the cross-bar is seated upon the
Other and more speci?c objects of the present invention
shoulders 24a of the Walls.
will be apparent from the following description as read
The shoulders 32 of the cross-bar are abuttable against
in connection with the accompanying drawings.
the oii’set portions of the walls, thereby limiting lateral
In the drawings:
displacement of the cross-bar and socket attached thereto.
FIGURE 1 is an elevational view of one embodiment
A coil spring 34 is disposed intermediately of the exter
of the present invention;
nal periphery of the socket and the offset portions 24 of
FIGURE 2 is a plan view of this embodiment of the
said pairs of walls. The said spring has a substantially
55
invention;
frusto-conical conformation. Its smallest coil 35 is seat
FIGURE 3 is a view taken from the rear of the form
ed upon the aforesaid cross-bar and its largest coil 36 is
of the invention depicted in FIGURE 1;
seated against the screws 19, thereby retaining the cross
FIGURE 4 is an exploded sectional view of the afore
bar and socket within the base of the cup.
said embodiment of the invention;
With this arrangement, the socket is resiliently retained
60
FIGURE 5 is a sectional view illustrating various com
within the cup whereby said socket is capable of consider
ponents of the invention in assembled position;
able movement with respect to the axis of the cup. If it
FIGURE 6 is a sectional view taken about the line 6—6
be desired to remove the spring and socket for any pur
of FIGURE 5;
pose, it is only necessary to rotate the screws 19 to a
FIGURE 7 is a sectional view taken about the line
position wherein their threaded portions do not project
7—7 of FIGURE 5; and
beyond the sides of the grooves 21, thereby clearing the
FIGURE 8 is a fragmentary perspective view of a por
coil
spring and permitting withdrawal thereof from the
tion of the socket seating means employed in the said
cup. Since the coil spring acts as the means for retain
‘embodiment of the invention.
ing the cross-bar and socket within the cup, the with
As may be seen in FIGURES l, 2 and 3, the aforesaid
embodiment of the invention comprises a bell-shaped cup, 70 drawal of the coil spring also permits withdrawal of the
aforesaid socket and cross-bar from the cup.
generally designated by the numeral III and provided with
a plurality of annular cooling vanes 11. The said cup is
It is to be noted that the screws 19' are accessible and
awards"
3
adjustable from the exterior of the cup, as by engagement
, oftheir slotted heads with a conventional screw-driver.
Assembly of the device merely involves sliding the
cross-bar into the grooves, the socket being mounted on
the cross-bar, and then disposing the coil spring on the
cross-bar, as aforesaid, and adjusting the screws against
the coil spring in the position shown in FIGURES 5
:3.
ing radially thereof; each end of said cross-bar being
formed with a pair of shoulders and a projecting tongue
disposed centrally between said shoulders; said tongues
eing slidably received in grooves formed in the inner
periphery of said bell-shaped cup; each of said grooves
being provided with a pair of Walls; said pair of walls
having an offset portion and shoulders; each end portion
of the cross-bar being seated upon the shoulders of one?
of said pairs of walls; the shoulders of said cross-bar be-'
ventionally used for lighting purposes and having a body 10 ing abuttable against the oifset portions of said pairs of
walls; each of said tongues of said cross-bar being dis~
of substantially conical conformation, may be threadedly
posed intermediately of one of said pairs of walls; a spiral
received in the socket. The body of said lamp may rest
spring disposed between said socket and the inner pe
against the rim 37, composed of an asbestos or other
riphery of said bell-shaped'cup, said spring having a sub
similar cushioning heat-resistant material, in which posi
tion said lamp will be springably supported by reason 15 stantially frusto-conical conformation, the smallest coil
of said spring being seated upon said cross-bar and urging
of the action of the coil spring which urges said lamp
said cross-bar against displacement from said ‘cup, the
against displacement from the cup as a result of the spring
largest coil of said spring being seated against radially
bias against the aforesaid screws and cross-bar.
adjustable means disposed in the wall of said cup; said
Suitable electrical conductors may be introduced
through aperture 18a, and ai?xed to terminals 23, which 20 radially adjustable means also being exposed exteriorly of
and 6.
With the foregoing arrangement, a lamp, such as is con
are depicted in FIGURE 7 and the cup as a whole may
be pivotably ai?xed by attachment of the ear 18 to a suit
said cup.
3. ‘In a lamp holder having a bell-shaped cup, the combination comprising: an electric socket provided with a
able bracket, said attachment being accomplished in con
cross-bar disposed at the base of said socket and project
junction with a suitable threaded member engaged with
25 ing radially thereof; each end of said cross-bar being
threaded hole 33.
formed with a pair of shoulders and a projecting tongue
As may be seen from the foregoing, the invention ac
disposed centrally between said shoulders; said tongues
complishes its objects in a simple and effective manner.
being slidably received in grooves formed in the inner
The various components of the invention may be quickly
periphery of said bell-shaped cup; each of said grooves
assembled and disassembled simply by appropriate ad
just ent of the screws so as to etlect retention of the 30 being provided with a pair of walls; said pair of walls
having an offset portion and shoulders; each end portion‘
spring and socket or permit their displacement from the
of the cross-bar being seated upon the shoulders of one
cup in the manner aforesaid. Said screws are externally
of said pairs of walls; the shoulders of said cross-bar be
accessible and externally adjustable, as hereinabove in
ing abuttable against the o?set portions of said pairs of
dicated. Moreover, the socket is seated by simple means
walls;
each of said tongues of said cross-bar being dis~
35
and the yieldability of the spring, as well as its trusto
posed intermediately of one of siad pairs of walls; a spiral
conical conformation permits maximum pivotal movement
spring disposed between said socket and the inner pe
of the socket, thereby permitting it to adjust itself to any
riphery of said bell-shaped cup, said spring having a sub
variations in lamp con?guration and to other factors which
stantially frusto-conical conformation, the smallest coil
might otherwise tend to tilt the socket out of coaxial
of said spring being seated upon said cross-bar and urging
alignment with the cup.
said cross-bar against displacement from said cup, the
7 The embodiment of the invention illustrated and de
largest
coil of said spring being seated against a pair of
scribed hereinabove has been selected for the purpose of
radially adjustable screws threadedly engaged with the
clearly setting forth the principles involved. It will be
apparent, however, that the present invention is susceptible
Wall of said cup, the threaded portions of said screws
ing radially thereof; each end of said cross-bar being
disposed centrally between said shoulders; said tongues
to being modi?ed in respect to details of construction, 455 projecting radially inwardly from the internal periphery
of said cup; the heads of said screws being disposed ex
combination and arrangement of parts which may be
teriorly of said cup.
resorted to without departure from the spirit and scope
4. In a lamp holder having a bell-shaped cup, the
of the invention as claimed.
combination comprising: an electric socket provided with
I claim:
1. In a lamp holder having a bell-shaped cup, the corn 50 a cross-bar disposed at the base of said socket and pro
jecting radially thereof; each end of said cross-bar being
bination comprising: an electric socket provided with a
formed with a pair or" shoulders and a projecting tongue
cross-bar disposed at the base of said socket and project
formed with a pair of shoulders and a projecting tongue
being slidably received in grooves formed in the inner
disposed centrally between said shoulders; said tongues be 55 periphery of said bell-shaped cup; each of said grooves
extending from the base of the cup to the vicinity of its
ing slidably received in grooves formed in the inner
mouth and being provided with a pair of walls; said pair
periphery of said bell-shaped cup; each of said grooves
of walls having an offset portion and shoulders adjacent
extending from the base of the cup to the vicinity of its
the cup base; each end portion of the cross-bar being
mouth and being provided with a pair of walls; said pair
of walls having an offset portion and shoulders; each end 60 seated upon the shoulders of one of said pairs of walls;
the shoulders of said cross-‘bar being abuttable against
portion of the cross-bar being seated upon the shoulders
the o?set portions of said pairs of Walls; each of said
of one of said pairs of Walls; the shoulders of said cross
tongues of said cross-bar being disposed intermediatcly
bar being abuttable against the offset portions of said
of one of said pairs of walls; a spiral spring disposed be
pairs of walls; each of said tongues of said cross-bar being
disposed intermediately of one of said pairs of walls; a 65 tween. said socket and the inner periphery of said bell
shaped cup, said spring having a substantially frusto
frusto-conical spring disposed annularly of said socket and
conical conformation, the smallest coil of said spring be
contactable with; said cross-bar, said spiral spring urging
ing ‘seated upon said cross-bar and urging said cross-bar
said cross-bar against displacement from said cup, the
against displacement from said cup, the largest coil of
large end of said spring being ‘seated against radially ad
said spring being seated against a pair of radially adjust
justable means disposed in the wall of said cup; said ra
able screws threadedly engaged with the wall of said cup,
dially adjustable means also being exposed for adjust
the threaded portions of said screws projecting radially
ment exteriorly of said cup.
inwardly from the internal periphery of said cup; the heads
, .2. In a lamp holder having a bell-shaped cup, the com
'of's'aid screws being disposed'exter'iorly ot‘said cup; the
bination comprising: an electric socket provided with a
cross-bar disposed at the base of said socket and project 75 said cup being provided with a plurality of inclined vanes~
5
8,075,168
formed on the external periphery thereof, at least two
of said vanes being provided with a boss, the heads of said
screws being seated upon said bosses.
References (Iited in the ?le of this patent
UNITED STATES PATENTS
1,509,070
Kerwin _____________ -_ Sept. 16, 1924
6
1,639,336
2,131,828
2,174,773
2,556,733
2,668,278
2,688,073
Gannett _____________ .._ Aug. 16, 1927
Williamson ____________ .._ Oct. 4, 1938
Blood _________________ ..._ Oct. 3, 1939
Mock ________________ __ June 12, 1951
Avery ________________ __ Feb. 2, 1954
Austin ______________ __ Aug. 31, 1954
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