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Патент USA US2406271

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Aug. 20, 1946.
_
2,406,211
1. H. VAN HORN
BASE FOR ELECTRIC LAMPS OR SIMILAR DEVICES
Filed ‘Jan. :50, 1942
,lnven'tow." :
Patented Aug. 20, 1946
I 2,406,271.
UNITED STATES PATENT orsiicn
IBASE FOR ELECTRIC LAIWPS OR
vSIMILAR’DEVICES
Irving H.‘Van Horn, East Cleveland, 0hio,'ass‘ign-'
or to General Electric Company, a corporation
of New York
Application January 30, 1942, ‘Serial No. 428,863
15 Claims.
1
(Cl. 176-32)
2
.
My invention relates to electric lamps and
similar devices comprising a bulb containing an
electric energy translation element and having
a base secured to .sai-d bulb. More particularly,
the invention relates to shock-proof base struc
screw threaded socket and upon transmission of
a shock thereto the bulb i0 is permitted, 'by the
' resilient skirt 20, to rock with respect ‘to the ‘said
base ‘l1 so that the shock is dampened before it
can result in destructive injury to the ?lament
tures for such lamps and similar devices.
An object of my invention .is to "provide a
resilient connection between the bulb and the
portion of the base which engages with :a socket
so that shocks transmitted to the socket will be 10
and other parts, such as glass parts, in the bulb
It, or to the basing cement. Tests have shown
that even extremely violent .shocks are success
fully dampened by such a base structure.
'
dampened before they reach the critical parts of
If desired, the base I‘! may be of any other
known type, such as the ordinary bayonet base
the lamp or similar device in the socket.
which has a cylindrical ‘shell and a ‘pair of pins
An
other object is to provide a shock~proof base
extending laterally therefrom. Moreover, the
which will ?t in an ordinary socket. Further
rubber skirt ‘2|! may, of course, be molded directly
objects and advantages of my invention will 15 into the base shell [1. ‘The cement 2'! ‘may ‘be
appear from the following description of species
eliminated, and if desired, any possible relative
thereof and from the drawing.
turning between the shell ‘I’! and skirt ‘2!! maybe
In the drawing, Figs. 1-3 are elevations, in sec
prevented by suitable protuberances or ‘indenta
tion, of three modi?cations of base structures
tions in the shell I‘! “which ?t in matching inden
comprising my invention.
20 tations or protuberances in the skirt ‘member ‘213.
Referring to Fig. 1, the lamp or similar device
It willbe noted that a small amount of slack‘ is
comprises a glass bulb l0 having a neck portion
left in ‘the lead wires vl2 ‘and 13 so as to permit
.H and a .pair of lead wires l2 and I3 extending
the bulb 1'0 to rock ‘freely with respect to the "base
' ill.
from a stem of the usual tipless construction pro
If desired, the inner surface of the skirt 2!)
vided with the usual exhausttube l4.
.
The bulb I B is provided with a base comprising
a cylindrical metal shell or body portion l't'
which, in this instance, is part of a conventional
screw threaded type of base including an eyelet
is which serves as the end contact andis secured
to the outer end of the shell 11 through the
medium of glass insulation l9.
_
In accordance with my invention, the shell ll’
2.5
surrounding the bulb neck may be roughened ‘or .
provided with screw threads (as ‘in ‘Fig. 2) to
provide a better gripping action vfor the cement
l6.
.
The structure shown in Fig. .'2 v‘is similar ‘to
that shown in Fig. 1. However, ‘in this instance, ~'
the bulb neck is provided with an open bottomed
screw ‘threaded base shell 15 which is cemented
‘to the bulb neck at l6 and the skirt member 20’
is connected to the bulb by a resilient skirt or
sleeve member 20 which may be made of rubber
is provided with corresponding internal screw
threads. In this case, it is also preferable that
or allied materials, preferably a'high temperature
a thin layer of cement or other adhesive be applied
synthetic rubber. The lower or outer end of
between the threads in the skirt 20' and on the
the said skirt member 20 is provided with screw
shell [5. Another minor distinction is the provi
threads and is threaded into the shell I‘! while
sion of a single axial passage 22’ in the bottom
‘its annular upper or inner end surrounds the 40 of ‘the skirt 2!!’ ‘through which both of the lead
bulb neck H and is secured thereto by the usual
wires 12 and I3 extend. In order to prevent short
basing cement IS. The said sleeve or skirt mem
circuiting, the lead wire I2 is provided with a
ber 20 may be secured ?rmly within the inner
surrounding tube '24 of suitable ?exible insulat
end of the shell I‘! by a comparatively thin layer
ing material; for example, ‘glass wool, asbestos,
of cement or other adhesive 2], some of which is 45 synthetic spaghetti, vetc. The lamp is completed
pushed down into the lower part of the base, as
by a base I‘! like that shown in Fig. 1. 'If desired,
shown. In the form shown in ‘Fig. 1, the lower
the shell l5 may, of course, .be made cylindrical,
end of the skirt or sleeve member 25 is closed
instead of screw threaded.
'
'
except for two openings 22. The lead Wires l2.
Referring to Fig. 3, the structure shown there
and I3 extend through said openings, the wire [2 50 in employs an ordinary screw threaded base
being soldered to the end contact 18 while the
I‘! ‘like that employed in the Fig. 1 and ‘2 mod
lead wire l3 extends upwardly between the shell
‘i?cationsv and a screw threaded shell I5 like
I‘! and skirt 20 and is soldered to the exterior of
that shown in Fig. 2. However, in this instance,
the shell I‘! at the point 23.
the rubber sleeve or skirt member 20 or 20' is
In use, the base I‘! is screwed into an ordinary 55 ‘replaced by a resilient helical wire spring mem
2,406,271.
3
axially from the end thereof, and a normally
ber' 2041., preferably made of steel or a spring
unrestrained resilient member secured at one
end to said shell and secured ‘at its other end
around said bulb neck to form a cushion which
is ?exible in all directions so that the said base
is characterized by the, absence of any unyield
alloy. The'said spring 20a is screwed into the
interior of the base I‘! and onto. thevexterior of
the shell IS. The said spring may ‘be secured
within the base H by a quantity of solder
25. In order that the spring Z‘Ua may be read
ily screwed intothe base l'l, itnmay be pro
vided with a lateral'or radial extension 26 at its
lower end. In this design, the lead wire I3 is
connected to the upper shell
I5.
Electrical I
1
ing. connections between the said bulb and the
metal
shell.
,
'
1
'
~ .
i
3. An electrical device comprising a bulb
10 having a neck portion and containing an elec
connection is furnished by the spring 20a. be
tric energy translation element and having a
proof base secured to said neck portion,
tween the lead wire‘ [3 and the base shell 11.11 *' shock
said base comprising a metal shell shaped to.
The spring 20a. functions in a manner analogous ‘ e -
engagewith a socket, and being in axial align
or 20' in Figs. 1 and 2. Once screwed into the 15 ment with said bulb neck portion and spaced
axially from. the end thereof, and a resilient
spring 20a, the shell [5 is prevented from un
rubber ‘sleeve member secured at one end to
screwing therefrom by contraction “or tighten—_
ing of the spring upon attempting to unscrew ‘said shell and secured at itsvother end around
said bulb neck to form a cushion which is ?ex
thesaid shell. Obviously, in the constructions
shown in the drawing, the rubber skirt 20 or 20 ible in all directions so that the said base is
to that of the rubber sleeve or skirt member 20
' 20,’, or the spring 20a, forms a cushion which
is ?exible in all'directions so that the base is
characterized by the absence of any unyielding
characterized bythe absence of any unyielding
connections between the said bulb and the metal
shell.
’
4. An electrical device comprising a bulb
connections between the shell I‘! and the
having a neck portion and containing an elec—}
1’ bulb m.
>
25 tric energy translation element and having a
It will be obvious to those skilled in the art
shock proof base secured to said neck portion,
'that various substitutions, changes and omis-,
said base comprising a" metal shell shaped to
sions may be made in the structures illustrated
engage with a socket and being in axial align
without departingfrom the spirit of my inven
tion. It will be obvious that the invention is‘ 30 ment with said bulb neck portion and spaced
axially from the end thereof, and a normally
useful for electric incandescent or discharge
unrestrained
resilient helical wire spring mem- "
lamps or for other similar devices such as radio
.ber secured at one end to said shell and secured ‘
tubes which may be subjected to extremely
at its other end around “said bulb neck to form
severe shocks. In the case of an incandescent,
a cushion which is ?exible in all directions so
lamp, the ?lament mount structure may be
that the said base is characterized by the
1 similar to that now in common. use in the so-,
absence of any unyielding connections between
- called rough service lamps; In such lamps the
the said bulb and the vmetal shell.
mount comprises a glass arbor extending axially '
.5. An electrical device comprising ‘a bulb con
of the bulb Ill from the stem and having a plu
rality ' of outwardly radiating support wires 40 taining an electric energy translation element
and having a shock proof" base secured to said
which support, a coiled ?lament. If desired,
bulb,
said base comprising a metal shell ?xedly
the shell 15in Fig. 3 may be eliminated by,
secured to an end of, said bulb, a second metal
molding screw threads in the bulbneck H cor-;
shell shaped to engage with a socket and being
responding to the' screw threads of the said»
in end-to-end alignment with said ?rst-men
shell 15; in this event, ‘some means, such as
tioned’ shell and spaced therefrom, and a resil
cement may be employed to.hold the spring on
ient rubber sleeve member secured at one end
the glass bulb neck. Moreover, in the’ form
shown in Fig. 3, the spring Z'ila ‘may be screwed
on to the exterior of the base shell IT; in this
_ case, the said shell is preferably elongated some
what sothat the spring is screwed on to only the
upper portion thereof to permit the lower por-‘v
tion to be readily screwed into a standard socket.
What I ‘claim as new and desire to secure by
Letters Patent of the United States is‘:
7
l. An'electrical device comprising a bulbricon-f
taining an electric energy translation element
to the interior of said second-mentioned shell
and secured at its other end around ?rst-men
tioned shell to form a cushion which is ?ex;
ible in all directions so that the said base is
characterized by the absence of any unyielding
connections between the said bulb and the sec
ond metal shell.
7
6. ,An electrical device comprising a bulb con
taining an electric energy translation element
andhaving a shock proof base secured to said
bulb, said base comprising a metal shell ?xedly
and having a shock proof base secured‘to said
q secured to an end of said bulb, a second metal
bulb, said base comprising a metal shell ?xedly
secured to an end of said bulb, a second metal 60 shell shaped to engage with a socket and being
in end-to-end alignment with said ?rst-men
shell shaped to engage'with a socket and being
tioned shell and spaced therefrom, and a nor
in end-to-end alignment with said ?rst-men-‘v
mally unrestrained resilient helical wire spring
tioned shell and spaced therefrom, and arnormally
member secured at one end to the interior of
unrestrained resilient -member interconnecting
said second-mentioned shell and secured at its
said shells to form a cushion which is ?exible in
other end around ?rst-mentioned shell to form,
all directions so that the said base is ‘character
ized by the absence of any unyielding connections
between the said bulb and the second metal shell
2. Any electrical device comprising av bulb
having .a neck portion'and containing an elec
tricv energy translation element and having a
shock proof ‘base s'ecureditosaid neck portion,
a cushion which is ?exible in all directions so
that the said base is characterized by the
absence of any unyielding connections'between
the said bulb and the second nietallshell.‘ ‘ "
7. An electrical device comprising a. bulb
containing an electric energy translation ele
said . base ~ comprising va. } metal -, shell. shaped to
ment and having ashock proof base secured
engage with a socket-and being'in axial ‘align
to ‘said bulb," said base Ycomprising' av screw.
;ment with saidb'ulb neck portion .andTspa'ced 75 threaded metal shell ?xedly. secured to an end
/
2,406,271
of said bulb, a second screw-threaded metal shell
shaped to engage with a socket and being in
end-to-end alignment with said ?rst-mentioned
shell and spaced therefrom, and a normally
threaded periphery, the inner end of the body
portion being circumposed about and ?rmly se
cured, to said shock-absorbing material and the
outer end carrying acontact insulated from the
body of said base, and means electrically con
necting‘said leads with said body portion and
unrestrained resilient . member interconnecting
said shells, said resilient member being threaded
into the interior of said second-mentioned shell
and around the exterior of said ?rst-mentioned
shel1 to form a cushion which is ?exible in all
directions so thatthe said base is characterized
contact member.
'
,
12. An electric lamp comprising a bulb hav
ing a sealed neck, a ?lament within the bulb
having leads extending through the end of said
neck, an elongate body of shock-absorbing ma
by the absence of any unyielding connections
between the said bulb and the second metal shell.
8. An electrical device ‘comprising a bulb
terial having an annular inner end portion cir
" cumposed about and ?rmly secured to the lower
_ containing an electric energy'7"-translation ele-_
end of said neck, a base member having a gen
ment and having a, shock proof base. secured to
said bulb, said base comprising a screw
threaded metal shell ?xedly secured to amend
of said bulb, a second screw-threaded metal
shell shaped to engage with a socket and being
in end-to-end alignment with said ?rst-men
tioned shell and spaced therefrom, and a resil
ient rubber sleeve member interconnecting said
shells, said resilient member being threaded
into the interior of said second-mentioned shell
and around the exterior of said ?rst-mentioned
shell to form a cushion which is ?exible in all
erally cylindrical body portion formed with a
screw-threaded‘periphery, the inner endof the
body portion being circumposed about and ?rmly
secured. to ‘said ‘shock-absorbing material, . and
means electrically connecting said leads and base
member.
a
13. An electric lamp comprising a bulb hav
ing a sealed neck, a, ?lament within‘the bulb
having leads extending through the end of said
neck, resilient shock-absorbing material dis
posed about and ?rmly secured to the lower end
of said neck, a base member having a generally
directions so that the said base is characterized ,
cylindrical body portion formed with means on its
by the absence of any unyielding connections
between the said bulb and the second metal
outer periphery for securing it in a socket, the.
shell.
I
9. An electrical device comprising a bulb con
taining an electric energy translation element
and having'a shock proof base secured to said
bulb, said base comprising a screw-threaded
metal shel1 ?xedly secured to an end of said bulb,
a second screw-threaded metal shell shaped to
inner end of said body portion being disposed
30 about and?rmly secured to said shock-absorb-g
ing material and the outer end carrying a con-v
tact insulated from the body ofsaid base, and
means electrically connecting said leads ‘with
said body portion and contact member.
I
14. An electric lamp comprising a bulb having
a sealed neck, a ?lament within the bulb having
leads‘ extending through the, end of said neck,
resilient shock-absorbing material disposed about
and ?rmly secured to the lower end of said neck,
engage with a socket and being in end-to-end
alignment with said ?rst-mentioned shell and
spaced therefrom, and a normally unrestrained
resilient helical wire spring member intercon 40 a base member having a generally cylindrical
necting said shells, said resilient member being
body portion formed with means on its outer pe
threaded into the interior of said second-men
riphery for securing it in a socket, the inner end
of said body portion being disposed about and
tioned shell and around the exterior of said
?rmly secured to said shock-absorbing material
?rst-mentioned shell to form a cushion which is
?exible in all directions so that the said base in. u! and the outer end carrying a contact insulated
is characterized by the absence of any unyield- ,
from the body of said base, means electrically
connecting said leads with said body portion and
ing connections between the said bulb and the
second metal shell.
contact member, said end of the neck of the bulb
10. An electrical device comprising a bulb
and said inner end of the base being separated
containing an electric energy translation ele (in Q\ longitudinally of the lamp byv an intervening
ment and having a ‘shock proof base secured to
space and said material bridging said space.
said bulb, said base comprising a hollow resil
15. An electric'lamp comprising a bulb having
ient rubber member having an enlarged cylin
a sealed neck, a ?lament within the bulb having
drical skirt portion surrounding and secured to
leads extending through the end of said neck,
an end portion of said bulb, said rubber meme , resilient shock-absorbing material disposed
her also having a shell-engaging portion of
about and ?rmly secured to the lower end of said
smaller diameter than said skirt portion ex
neck, the base member having a generally cylin
tending outward from said skirt portion beyond
drical body portion formed with a screw-threaded.‘
the said end of the bulb, and a metal base shell
periphery, the inner end of said body portion
shaped to engage ‘ in a socket
and secured
around said shell-engaging portion 01' the rub
ber member.
s
.
.
,
11. An electric lamp comprising a bulb hav~
ing a sealed neck, a ?lament within the bulb
having leads extending through the end-of said
neck, resilient shock-absorbing material circum
posed about and ?rmly secured to the lower end
of said neck, a base member having a generally
cylindrical body portion formed with a screw
being disposed about and ?rmly secured to said
shock-absorbing material and the outer end
carrying a
said base,
leads with
said end of
contact insulated from the body of
means electrically connecting, said
said portion and contact member,
the neck of the bulb'and said inner
end of the base being separated longitudinally
of the lamp by an intervening space and said ma~~
terial bridging said space.
.
.
IRVING H. VAN ‘HORN.
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