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Патент USA US3030508

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April 17, 1962
P. A. JONES
GLOBE ATTACI-WIENT FOR LIGHT FIXTURES
Filed Dec. '7, 1959
3,030,498
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PRESTON A. JONES
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April 17, 1962
P. A. JONES
3,030,498
GLOBE ATTACHMENT FOR LIGHT FIXTURES
Filed Dec. 7, 1959
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PRESTON A. JONES
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3,030,498
Patented Apr. 17, 1962
2
1
overlap the annulus. With the open end of the globe
3 030 498
?tted over the ?ared outer end of the sleeve, and the
Preston A. Jones, 2229 4th St, San Rafael, Calif., as
signor of one-half to Wallace D. Runswick, Berkeley,
Calif.
Filed Dee. F7, 1959, Ser. No. 857,688
7 Claims. (Cl. 240-128)
of the threaded sleeve will cause the sleeve to retract into
globe abutted against the annulus as described, rotation
GLOBE A'I‘TACl-lll/IElNT hon LIGHT rrx'ruans
the ?xture and clamp the rim of the globe against the
annulus. To effect this rotation of the sleeve, and to
distribute stress on the glass globe, a number of small
resilient cushions are secured to the rim of the sleeve and
are the elements which make contact with the rim of the
The present invention relates to electrical lighting ?x
tures and more particularly to a ?xture having advanta
10
geous provision for engaging and disengaging a bowl or
globe which is mounted thereon.
globe. If the globe is held in contact with these cushions,
such as will occur naturally if the ?xture is mounted in
a ceiling, turning of the globe will act to turn the sleeve
and thus to tighten the globe in place. Turning of the
globe in an opposite direction will act to extend the
the incandescent variety, it is a common practice to pro
sleeve from the ?xture and thus allow the globe to be
15
vide a generally translucent bowl or globe around the
removed.
'
light bulb itself. The globe may serve several purposes,
As may be seen, the operations of attaching or detach
probably the most important of which is that of diffusing
ing the globe are accomplished by grasping the globe
the light to lessen eye-strain. Other functions of the globe
with both hands and turning it in an appropriate direc
are to protect the more fragile light bulb and to improve
tion. No special fabrication is required on the globe
20
In the design of electrical light ?xtures, particularly
the esthetic appearance of the ?xture. To facilitate
changing of the light bulb, and as an aid in cleaning
or otherwise servicing the ?xture, it is desirable that the
attachment of the globe to the ?xture be a readily dis
and the attachment is made in such a way that breakage
of the glass at points of contact is virtually impossible.
It is thus an object of this invention to provide an elec
trical light ?xture of the class having a globe in which
engageable one.
attachment and removal of the globe may be more easily
25
To best serve the foregoing purposes, it has been found
accomplished.
preferable in most instances to form the globe of glass,
It is an object of this invention to provide a superior
or glass-like material. Owing to the brittleness of this
mode of attachment of a globe or bowl to a light ?xture
material, and to the fact that the globe should be easily
with which attachment or removal of the globe can be
removable, specialized fastening means must be used to
accomplished by rotating the same.
secure the globe to the ?xture. The fastening means 30
It is a further object of this invention to provide an
should not exert any severe localized stresses on the
electrical light ?xture having novel means for attaching
globe and should not require that screw-holes, threads,
or other standard fastening provision be formed on the
a globe thereto which means requires no special fabri
cations on the globe.
glass. For safety reasons, and to prevent breakage, the
It is an object of the invention to provide a means for
35
fastening should not require that a person support the
fastening a globe or bowl to a light ?xture with which
globe with a single hand while attempting to disengage
means no severe localized stresses are exerted on the
the fastening with the other hand. Neither of the opera
globe whereby the possibility of breakage is minimized.
tions can be performed efficiently, or safely, with a single
It is still a further object of this invention to provide
hand.
an
electrical light ?xture having a more secure provision
The most common method of attaching the globes to 40 for mounting a globe thereon and which permits the
the ?xtures which has been heretofore employed makes
globe to be grasped with both hands while being attached
use of a ?ange formed around the open end of the globe.
The ?ange is entered in a metal rim formed on the ?xture
and three hand-screws are threaded through the rim and
or removed.
The invention possesses other objects and features of
advantage, some of which, with the foregoing, will be
project under the ?ange thus preventing the globe from 45 set forth in the following description of the preferred
dropping. This structure does not entirely meet the re
form of the invention which is illustrated in the drawings
quirements set forth above. The fastener makes it nec
accompanying and forming part of the speci?cation. It
essary that a ?ange be formed on the globe and the three
is to be understood, however, that variations in the show
hand-screws can produce points of stress concentration
which may, if not carfully controlled, fracture the glass.
Of particular signi?cance is the fact that the structure
requires that the globe be supported with one hand while
ing made by the said drawing and description may be
adopted within the ‘scope of the invention as set forth
in the claims.
FIGURE 1 is an elevational section View of a lighting
the other is used to tighten or release the screws. As
?xture
shown installed in a ceiling.
has been pointed out, these manipulations can be diflicult,
FIGURE 2 is a section view of the ?xture taken along
55
time consuming, and possibly hazardous particularly since
line 2-2 of FIGURE 1 and further illustrating the struc
the operations must frequently be performed while stand
ture thereof.
ing on a ladder.
The present invention provides a more easily operated
and more secure attachment with which the globe may
FIGURE 3 is an elevation view, partially in section,
illustrating the method by which a globe is installed on
be held by both hands during engagement or dis-engage 60 the ?xture or removed therefrom.
FIGURE 4 is a section view taken along line 4-—4 of
ment. The invention does not require special fabrications
FIGURE
1 and showing the means by which a globe is
on the globe and acts to distribute stress to the point
held on the ?xture.
where the possibility of fracturing the glass is virtually
Referring now to the drawing and more particularly
eliminated.
Speci?cally, the invention makes use of an annulus 65 to FIGURES l and 2 thereof, there is shown a section of
a typical ceiling wall 11 in which a circular opening 12
secured to the ?xture through which the light bulb may
extend and against which the open end of the globe is
has been cut in order that a lighting ?xture may be in
abutted, the globe being of a design in which the rim of
stalled thereat. A rectangular base plate 13 is disposed
the open end curves inwardly. A sleeve is threadably
against the upper surface of wall 11 and centered over
engaged on a post within the ?xture and extends coaxially 70 opening 12, the plate having a central opening 14 of
through the annulus, the outer end of the sleeve being
slightly less diameter than the wall opening 12 and which
?ared so that opposed sections of the rim of the sleeve
8,030,498
is provided with a curved rim ‘16 projecting downwardly
through the wall opening.
A
'
4
rotated olf the cylinder, it is desirable that the sleeve be
removable from the cylinder. This may be accomplished
by bending the spring stop 47 towards socket 37 a suf
?cient distance that the blade 49 may clear the angled
A rectangular housing 17 having an open lower face
is disposed over base plate 13 and centered thereon, the
housing being held in position by clips 18 formed on the
end of the stop.
base plate. To secure the housing 17 to the base plate
The lower end of sleeve 42 ?ares outwardly to a di~
I 13, tension springs .19 may be used, each such spring
ameter slightly less than the inside diameter of annulus 26.
having a hook on each extremity which hooks engage
A short cylindrical section 51 is formed at the lower end
slots 21 on the upper surface of the base plate and slots
22 in the lateral walls of the housing.’ It should be 10 of the sleeve 42 and along opposite portions of the rim
of section 51 a pair of partial ?anges 52 are provided.
understood, however, that other fasteners, such as screws,
Each of the ?ange portions 52 extends along substantially
rivets, or the like may be used if preferred. A junction
ninety degrees of arc of the cylindrical section 51 and
box 23 is disposed to one side of the housing 17 in
each extends outwardly to points directly beneath the
spaced apart relationship thereto, the junction box being
secured to the housing by supports 24.
. 15 annulus 26.
TA pair of small resilient cushions 53 are secured on
To provide a surface against which the rim of a globe
each of the ?anges 52, one near each extremity of each
may ‘be abutted, and to close the marginal portions of
?ange. The cushions 53 are formed of rubber in this
the wall opening 12, an annulus 26 is disposed coaxially
instance and each has a hemi-spherical upper portion 54
within the base plate opening 14. Annulus 26 has a
with a protuberant lower portion 56 of less diameter which
short cylindrical upper portion 27 and ?ange 28 at the
lower portion extends through an aperture 57 in the
lower extremity which ?ange extends subjacently of the
?ange.
ceiling wall 11 around the opening ‘12 therein. The
Considering the method of installing and removing a
annulus 26 is attached to housing 717 by means of a
globe, and with reference to FIGURE 3 in particular, the
second set of tension springs 29 which springs are pro
vided ‘with hooks at each end and which hooks engage 25 globe 58 may be of any desired general con?guration but
should be of the type having an opening 59 at the upper
in slots ‘31 in the annulus and slots 32 in the lateral wall
end, the margins 61 of which opening curve inwardly with
of the housing. Owing to the described use of springs
29 for attaching the annulus 726 to the housing, the 'spac- ' respect to the body of the globe. The globe 58 should,
in addition, have an opening 59 of slightly less diameter
ing of ?ange 28 from base plate 13 may vary in accord~
ance with the thickness of the particular ceiling 11 in 30 than the inside diameter of annulus 26. To install the
globe, sleeve 42 is rotated to a position where ?anges 52
which the unit is to be mounted and in every instance
the ?ange will be held tight against the undersurface of
the ceiling.
are lowered a substantial distance from the undersurface
of annulus 26. The globe 58 is then lifted onto the lower
end of sleeve 42, by tilting the globe and inserting ?rst
Considering now provision for mounting an incan
descent light bulb in the ?xture, a socket assembly 33 is 35 one ?ange 52 therein and subsequently inserting the other
?ange therein, and is then rested on the cushions 53. The
secured to the underside of the upper wall of housing
globe 58 may then be rotated, the friction between the
17 at the center thereof. Such assembly 33 comprises a
rim of the globe and cushions 53 acting to turn the sleeve
circular base 34 disposed directly against the housing,
with the globe. Turning of the sleeve’ 42 acts to raise
the base having an externally threaded downwardly ex
?anges
52, and thus the globe also, until the margin 61
tending cylinder 36 for purposes which will be herein
of the globe is abutted'a'gainst the undersurface of an
after described. A standard ceramic light bulb socket 37
nulus 26. As best shown in FIGURE 4, the upper mar
is secured to the underside of base 34 in coaxial rela
gin 61 of the globe is then pressed between the cushions
tionship therewith, the base being provided with a pair
53 on the underside and annulus 26 on the upper side
of opposed radial bosses 38 which enter matching slots
39 in the base of the socket and a pair of screws 41 being 45 and is securely held in place on the ?xture.
, To remove the globe 58, the foregoing sequence of
transpierced through the upper wall of the socket to
secure the socket to the base. The socket 37 is of the
type which receives and retains a standard light bulb and
it will be understood that suitable wiring will be provided
for energizing the bulb, the manner of providing the same
being well understood within the art.
Considering now means with which a globe or bowl is
operations is reversed. Thus the globe 58 may be ro
tated to lower sleeve 42 and subsequently tilted and re
moved from the sleeve.
While, for purposes of reference, the ?xture has been
herein described as mounted in a celing wall, it should
be understood that the structure may equally well be
mounted in sidewalls or in any other position. If the
attached to the ?xture, there is shown a downwardly ?ar~
ing sleeve 42 mounted coaxially on cylinder 36. The
?xture is not in the described vertical position, however,
Owing to the threaded attachment of sleeve 42 to cylin
der 3.6, the sleeve may be raised or lowered by rotation
in an appropriate direction. To prevent the sleeve 42
It should be understood that variations in the de
scribed structure may be made. Cylinder 36, for example,
may be made of greater diameter and be internally thread
smaller upper end of sleeve 42 is provided with an in 55 it will be found necessary'to pull the globe 58 against
the cushions 53 as the globe is turned for insertion or
wardly directed rim 43 against the undersurface of
removal in order to insure that the sleeve 42 turns with
which rim an annular stilfener 44 is secured by screws
the globe. The operation is easily accomplished and is
46. stiffener 44 has an inside diameter corresponding to
virtually as'convenient as operation in the vertical posi
the outside diameter of cylinder 36 and threads are pro
tion.
'
t
vided on the sti?ener which engage those on the cylinder.
from being inadvertently rotated completely on’ the cylin
ed so that sleeve 42 may be of a more cylindrical shape
der 36, a disengageable stop 47 is provided, the stop 65 and may engage the interior of the cylinder. In some
adaptions of the invention, the base 34 may be secured
being a leaf spring projecting downwardly from base 34,
directly to a ceiling and housing 17 will not be required.
within cylinder '36, and terminating in a right angled
What is claimed is:
lower section 48 which projects across the rim of the
1. In an electrical illumination ?xture, the combina
lower end of the cylinder and is again angled downwardly.
A small blade member 49 projects downwardly from 70 tion comprising a base having provision for attachment
stiffener 44 in position to strike the angled lower section
48 of stop 47 when the sleeve 42 reaches the lower limit
of travel; While the stop 47, in conjunction with blade
to a wall and including a light bulb receiving socket on
a ?rst side, a threaded cylinder disposed on said ?rst side
of said base, an annular element secured to said base and
49, normally acts to prevent the sleeve 42 from being 75 spaced from said ?rst side or" said base and from said
cylinder and being coaxial with said cylinder, a light
3,030,498
6
transmissive globe having a circular opening, the sur
face of said globe around the margin of said opening being
gin of said opening in said globe being turned towards
the axis of said opening and exteriorly abutted against
curved towards the axis of said opening and disposed
in abutment with said annular element, a sleeve having
said annular element, a sleeve member disposed coaxial—
ly with respect to said threaded cylinder and having an
threads at a ?rst end which threads engage said threaded 5 inwardly directed rim at a ?rst end which rim is pro
cylinder, the second end of said sleeve extending through
said annular element and being provided with laterally
vided with threads engaging those of said cylinder where
by rotation of said sleeve moves said sleeve along said
cylinder, said sleeve being ?ared outwardly in a direc
extending members which extend from the axis of said
sleeve a distance exceeding the radius of said opening in
tion away from said cylinder and having a second end
said globe, and high friction resilient cushioning means 10 extending through said annular element which second
disposed on said laterally extending members of said
end is provided with radially projecting members at op
sleeve on the sides thereof which face said annular ele
posite points which members extend outward a distance
ment and in frictional engagement with the interior
exceeding the radius of said opening in said globe, and
surface of the globe bordering the opening thereof where
a plurality of resilient high friction cushions secured to
by rotation of said globe is frictionally imparted to said 15 radially projecting members of said sleeve on the sides
thereof which ‘face said annular element and interiorly
sleeve to move same into and out of clamping engagement
with the globe.
2. An electrical illumination ?xture as described in
engaging the margin of said opening in said globe where
by rotation of said globe is frictionally imparted to said
sleeve to move same into and out of clamping engage
claim 1 wherein said laterally extending members at said
second end of said sleeve comprise portions of a ?ange 20 ment with the globe.
6. An electrical light ?xture as described in claim 5
on the end of said sleeve which ?ange portions are con
and wherein said annular element is secured to said hous
?ned to a pair of opposite sectors of said sleeve.
ing by means of a plurality of circumferentially spaced
3. An electrical illumination ?xture as described in
tension springs each having a ?rst end engaged with
claim 1 wherein said laterally extending members at said
second end of said sleeve comprise two segments of a 25 said annular element and a second end engaged with said
?ange thereon which segments occupy two opposite quar
ter sectors of said sleeve and wherein said cushioning
means comprise a plurality of cushioning elements dis
posed one adjacent each end of each of said ?ange seg
housing whereby said annular element is held against
said wall by spring tension.
7. In an electrical light ?xture substantially as de
scribed in claim 5 the further combination of disengage
ments and each of said cushioning elements has a hemi
able means for limiting said movement of said sleeve
spherical upper surface facing said annular element.
along said cylinder, said means comprising a leaf spring
having a first end secured to said base within said cylin
der and extending in a direction parallel to the axis there
of, said leaf spring having an angled section at the sec
disengageable stop secured to said threaded cylinder posi
tioned to limit travel of said sleeve along said threaded 35 ond end which angled section extends laterally across the
rim of said cylinder, and a blade secured to said inward
cylinder in the direction of said globe whereby said sleeve
ly directed rim at said ?rst end of said sleeve which blade
may not be inadvertently rotated off said sleeve.
projects therefrom in parallel relationship to said cylin
5. In an electrical light ?xture, the combination com
der and in position to intercept said angled section of
prising a wall having an opening therein, a housing hav
ing an open face disposed against the opening in said 40 said leaf spring at the limit of movement of said sleeve
along said cylinder.
wall, a base secured within said housing against the sur
face thereof opposite from said wall opening and hav
References Cited in the ?le of this patent
ing a socket for receiving a light bulb, an externally
4. An electrical illumination ?xture as described in
claim 1 and comprising the further combination of a
threaded cylinder disposed within said housing in co
axial relationship With said socket, an annular element 45
disposed around said opening in the wall on the oppo
site side thereof from said housing and secured to said
housing, a globe having an opening at one side, the mar~
UNITED STATES PATENTS
1,192,722
1,902,023
Wright _____________ __ July 25, 1916
Gallagher ___________ __ Mar. 21, 1933
1,939,260
Guth _______________ __ Dec. 12, 1933
2,639,368
Pryne _______________ __ May 19, 1953
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