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Патент USA US2129597

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Sept. 6, 1938.‘ ./
B. c. WEBSTER
. 2,129,597
ELECTRIC LAMP SOCKET FOR DOUBLE FILAMEN'T LAMPS
Filed April 2, 1935
. 32
2 Sheets-Sheet 1
4O
INVENTOR
'
BENJAMIN
-
c.‘ WEBSTER
BY HIS ATTORNEYS
MMM
‘Sept. 6, 1938.
2,129,597
B. c. WEBSTER
ELECTRIC LAMP SOCKET FOR DOUBLE FILAMENT LAMPS
Filed April 2, 1935
2 Sheets-Sheet 2
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Patented Sept. 6, 1938
12,129,597
UNITED ‘STATES PATENT ‘ OFFICE
‘2,129,597
ELECTRIC’ LAlVIP SOCKET FOR DOUBLE
FILAMENT LAMPS
_
Benjamin C. Webster, Southport, C‘onn., assignor.
to The Bryant Electric Company, Bridgeport
Conn, a corporation
of Connecticut
,
.
~
.
,
Application April 2, 1935, Serial No. 14,306
11 Claims. (Cl. 173-—347)'
This invention relates to electric lamp sockets.
parts as _ will hereinafter be fullyv described.
More particularly ‘it relates to electric lamp sock
ets for electric lamps which have double ?laments,
These. bodies are coaxially. assembled as illus-\
trated. The insulating body I0, which, may be
‘ each ?lament of which may be lighted. separately,
=51“ or both of them may be lighted at one time. I
called the socket base, is hollowed out cylindri-v
cal‘ly‘ from one end to accommodate a conven
It is an object of this invention to provide a
tional screw shell 12 which is adapted to‘ receive
device having an electric lamp socket for double
?lament lamps in one portion of the device, and
the base of an electric lamp of the type having
two ?laments. conventionally such a‘ Lamp ‘base
‘ in another portion a switch mechanism for con
ii)’ trolling the ?ow of the current through the ?la
mcnts.
,
Another object of this invention is to provide
a device of the above type in which the’ socket
portion may be separated from the switch por
m tion in order that each of these portions may
has, in addition to its screw contact, an annular
contact and a button contact, the ring andn‘button
the lamp base, with, the button inside of the ring.
To contact with the annular contact of the ‘lamp,’
there is provided within the socket base 10 of
my invention, a metal ring l4 which is mounted‘
be used separately if desired.
Another object of this invention is to provide
upon a hub l6 that projects up within the socket
base Iii from theend wall ‘coaxially with the axis
an electric lamp socket of the above type in which
the socket portion and the switch portion are se
20 cured together by means of screws which in addi
of the socket base. Bent out of the plane'of ‘this
ring I 4 in a directionj'a'w'ay from ‘the open end
the socket.v
threads into a terminal'plate t9. This-plate I 9'
"
'
'
the accompanying drawings.
In the drawings:
I
‘
,
,
Figure 1 is a longitudinal midsection view of
30 an electric lamp socket and switch device con
structed according to the principles of my in'—
vention.
,
Figure 2 is an end view of the device shown
40
passing through the bottom of the'socket" base
' has another threaded hole through which the
hereinafter described bolt‘ {5 passes.
To cooperate with the'ilbutton'contactfofthe‘
lamp base, there is provided a resiliently mounted‘
contact l8 in'thev socket base coaxial‘with the
hub I 6‘ and the socket base. This central contact at
l8 has an enlarged head which is capable foire'é
ciprocation within a cylindrical recess I61‘ ‘inith'e
hub l6. A coil" spring Zll‘is placed around the
in Figure 1 looking into the socket end.
stem of the central contact 18' and presses'against
Figure 3 is a‘plan View looking into the interior
ofv the switch base of the device shown in Figure 1.
Figure 4 is a plan view looking at the bottom
the bottom of the ‘recess vI67~ and the inside‘ of the
enlarged head_ of the contact IS. The stem of the
or exterior of the cover of the switch portion of
in the end- wall of the socket base'and has'a
the device shown in Figure 1.
circular washer 22' mounted'on the inwardly ex;
tending end, thereof by peening over the end of‘
'
Figure 5 is a plan view of the exterior of the
end face of the socket portion of the device ‘shown
in Figure 1.
s
Figure 6 is a midsection view of the socket por
tion of the device shown in Figure 1, the section
,1. 5 being taken along the line 6-6 of Figure 5.
Figure 7 is a view of the current carrying parts
of the invention disclosed in Figure 1 with these
parts in perspective and connected diagram
matically to show the circuit arrangement.
50
the end" thereof and" secured to the end‘ wall'of
the base portion Why a bolt IT. This bolt after‘
Other objects and advantages of my invention
will appear as it is described in connection with
35
of the socket base is a leg'llll with afoot 14]‘ at‘ 20
tion to their function of holding the parts to
gether also perform as current carrying parts
to carry the electric current from the switchto
,
Referring to the drawings, the device comprises
three bodies 6, 8 and ll), of insulating material
such as porcelain or a phenolic condensation
product. Each ofv these insulating bodies is sub
stantially cylindrical and provided‘ with proper
55~ recesses for the reception of switch and socket
it
being concentrically ‘positioned at‘, the 1 end of
a
central contact [8 projects through an'aperture
it
the stem-of the contact l8.’ This washer Z'Z'has;
in diametrically opposed‘ positions on the pieriphf
ery, radial extensions which are bent at right
angles to the plane‘of the washer ‘so as'to work
in slots running longitudinally of the‘socket’ base 4.5
Ill. The stem of the central'contact l8 may‘ be
hollowtand internally threaded to receive a screw
when the socket portion of 'my device is used
‘separately from the hereinafter described switch
portion.
s ‘
The screw shell I? of the socket is" held against
the inner face of the end wall of the socket base
In by a pair of diametrically spaced square headed
tubular rivets 24’, 24' passing through the end wall
and internally threaded to receive'screws‘as will
2
2,129,597
hereinafter be described. The end wall of the
screw shell I2 is punched out leaving partial seg
ments I2s for securing the screw shell to the in
side end wall of the socket base ID. The parts
thus far described form the socket portion of my
invention.
.
The switch portion will now be described.
insulating parts 6 and 8 and the switch parts
tained therebetween, comprise said switch
10 tion. This switch part is itself a complete
and is adapted to be secured to the socket
‘The
con
por
unit
part
by bolts as will hereinafter be more fully de
scribed, when both the switch and socket parts
have been completely assembled separately ‘from
15 each other.
All the parts of the switch mechanism are
‘ wholly mounted upon the insulating part 6 which
may be termed the switch base. _ The switch may
be of the rotary snap type which is actuated by a
20 pull chain 30 to cause a rotating switch blade 32
to rotate with a series oi snap movements com
prising steps spaced apart by arcs of 90°. vOf
the four positions} thus resulting one will be an
“off” position wherein the circuit from the supply
25
lines to the switch and socket is broken.
In the
other three positions the switch will complete cir
cuits from the supply lines through one or the
other or both of the ?laments of the double ?la
ment electric lamp, which may be secured within
the socket portion of the device.
Inasmuch as the details of the vsnap switch
mechanism form no part of this invention and
aperture in one arm 38b of the member 38.
The
bolt I5 is threaded only at its end and has its
shank turned to a diameter less than the root
diameter of the threads so that it will turn loosely
in the hole in the terminal plate I9 when once the
threaded end of the bolt has passed therethrough.
There is, of course, a bore through the end wall
of the cover 8 in register with the hole in terminal
plate I9 and the aperture in the arm 38b, for the
passage of the bolt I5.
1O
‘The bolts 52 and 53 pass through the tubular
rivets 24, 24'. The bolt 53 then threads into a
hollow rivet 55 within the cover 8 of the switch
portion (see Fig. 4). The bolt 52 after passing
through its tubular rivet 24 is then screwed into 15
a threaded hole in a U-shaped bracket 54, one leg
of which is enlarged as at 54a to provide a sur
face sui?cient for another hole 5'! into which is
threaded a binding screw 56 for connection there
to of a lead wire (not shown, except diagram
20
matically, in Fig. 7) .
The cover 8 adjacent the terminal screw 56 is
cut away as at 59 to provide space for the en
trance of the lead wire and an aperture 58 in
register with 59 is also formed in the switch base 25
6 in order that the lead wire may pass out through
the end of the switch base 6 for connection to one
of the power lines.(L2). The other power line L1
is connected to the device by means of a lead wire
which passes through an aperture 6I in the switch 30
base 6 adjacent the foot 34a of the metallic mem
ber 34 and this lead wire is connected to the arm
many types thereof are well known to those
34b‘ of the metallic member by a terminal screw
skilled in the art, I do not deem it necessary to
35 describe in detail such mechanism. It will suf?ce
to explain that the switch blade comprises three
arms 32a, 32b, and 320 spaced 90° apart from one
60, the cover 8 being apertured in its end face
over the arm 34?) to make possible the manipula
tionof the terminal screw 60 without removing
another and adapted in oneof the switch posi
tions to engage with the contact portions 34a, 36a,
40.. 38a, of metallic members 34, 36, 38,- hereinafter
modation of the lead wire.
The passage of the current through the device
will now be described. The current from the me 40
the cover 8 and also to provide room for accom
described in- greater particularity. In other
switch positions, as the switch blade is rotated,
the switch contact 340. will be connected by the
arms 32c and 320 with the stationary contact 38a.
tallic member 34 proceeds to the socket portion of
the device through the arms 32a, 32b, and 320 of
lines L1 and L2 to the socket parts is broken.
The metallic members 34, 36 and 38 are each
U-shaped and may be stamped from sheet metal
with one of the legs of each forming the herein
before mentioned contact portions 34a, 36a and
38a; These contact portions may be secured to
55 the inner face (lower face in Fig. 1) of the insu
the arm 36?) of the metallic member 36, and has
the movable contact to the members 36 and 38
as hereinbefore described.
The member 36 has an electrical connection 45
45 or by the arms 32b and 320 to the stationary '
switch contact 36a. When the arms 32a and 32b
with the’ central contact I8 of the socket portion
connect stationary contacts 36a, 38a, the switch is of the device by means of a resilient strip 66 of
in “off’? position and the circuit from the power sheet metal which is secured by a screw upon
50
lating part 6 by screws extending longitudinally
of the device through the part 6.
The insulating part 8 forms a cover for the
switch base 6 and the switch mechanism mount
60 ed thereon. This cover is secured in position
upon the switch base 6 by screws 40, 42 (see Figs.
1 and 4) which extend through apertures in the
face‘ of the cover and are screwed, respectively,
into a U-shaped bracket 44 which supports the
65 ?ared‘ tubular chain guide 46, and into an in
ternally threaded bushing 41 (see Fig. 3) which
passes through the switch base and has its end
spun over on the end of a‘bracket 48 which sup
ports the switch spindle bearing 50.
70
a curved portion extending into the axis of the
device in such position that when the socket
base In is secured upon the cover 8, the end of
the central contact I8 which projects through
the end wall of the socket base will be engaged
by the curved portion of the resilient strip 66.
h The metallic member 38 is electrically con
nected to the ring contact I4 of the socket por
tion of the device by means of the bolt I5 being
threaded into an aperture in one arm 38b of the
member 38. '
(3O
The member 54 is electrically connected to
the screw shell by the bolt 52.
~The connections of two ?laments A and B of
. a double ?lament electric lamp to the screw shell
I2, ring contact I4 and central contact I8, are
shown diagrammatically in Figure '7. Since these
connections are conventional, the passage of the
current'therethrough need not be described in
detail herein but will be apparent to those skilled
in the art. The dotted lines in Figure 7 indicate
passage of current between the parts connected
For securing the socket base I 0 against the
cover 8 of'the switch portion of the device, three
bolts I5, 52, 53 pass through the bottom of the ' thereby. ' In the assembled device, the parts con
base Ill. The bolt I5 passes through the foot I41‘ nected by the dotted lines are in physical and
of the ring contact I4 and through the holein the electrical engagement.
75 terminal plate I9, and ?nally threads into an
,From'the foregoing description of the device 75
3
2,129,597
and from a study of the connections it will be
noted that when the switch blade 32' is rotated
90° counter-clockwise from the position‘ in which
it is‘shown in Figure '7, only the ?lament B will
be lighted. When the switch blade is rotated
180° from the position shown in Figure rI, only the
?lament A will be lighted. When the switch
blade is in the position shown in Figure 7, both
?laments will be lighted.
An important advantage of my invention lies
10
in the fact that the socket portion can be sep
arated from the switch portionv and used without
the switch when it is desired to have the lamp
controlled from a remote point. Under such
15 conditions, either the switch portion or any other
suitable type of switch may be inserted in the
circuit at the remote point for controlling the
passage of current through the electric lamp.
double ?lament lamp, means capable of manip
ulation through said screw shell for securing said
socket portion and said switch portion together
and carrying current from said screw shell and
ring contacts to certain of said stationary switch 5
contacts, and a resilient conducting member be
tween said switch and socket portions forming
a self-adjusting connection for carrying current
from said center contact to one of said stationary
switch contacts.
,
3. In a-switch and socket device for double
?lament lamps, a socket portion comprising an
insulating body, concentrically arranged shell,
ring and center‘ contacts mounted on said body,
internally threaded means associated with said 15
shell, ring and center contacts respectively for
the reception of feed wire binding screws where
'by three conductors may be connected with said
contacts if and when said socket portion is used
Suitable brackets are now available-in the mar
alone, in combination with a switch portion com 20
20 ket for securing the socket portion of the device prising a pair of cooperating insulating bodies,
in the desired location when the socket portion
is used alone. Under such conditions lead wires a switch mechanism’ including conducting ele
may be connected as follows: One, to the center ments housed within said cooperating bodies and
contact I8 by a terminal screw (not shown)
25 screwed into the hollow stem of the contact I8.
Second, to the screw shell by a terminal screw
screwed into the hollow rivet 24 (see Fig. 6),
which holds the shell in place. Third, to- the
terminal plate by a terminal screw threaded into
30 the aperture in which the bolt I5 is at present
shown. The bolt l5, not being needed will of
course be removed.
Thus, I have provided a novel combination of
a switch and a socket for holding and controlling
so‘ constructed and arranged that either one or
both ?laments may be electri?ed, certain con 25
ducting elements of said switch mechanism hav~
ing screw-threaded openings accessible through
one of said cooperating bodies, and bolts passing
through said socket portion from the interior
and engaging in said screw threaded openings
to secure said switch and socket portions together
and to connect said socket contacts and said
switch mechanism electrically.
4. In a switch and socket device for double
?lament lamps, a socket portion comprising an 35
two ?lament lamps, the socket portion of the
combination being usable with or without the
switch.
insulating body, concentrically arranged shell,
Many modi?cations within the scope of my in
vention will occur to those skilled in the art,
40 therefore I do not limit my invention to the
shell, ring and center contacts respectively for
speci?c embodiment shown.
I claim:
1. A switch and socket device for double ?la
ment lamps, having a switch portion and a socket
45
portion, said switch portion comprising switch
mechanism including ?xed and movable con
tacts for encircling one or both ?laments of the
lamp, cooperating insulating bodies enclosing said
switch mechanism, said socket portion compris
ing an insulating body on which are mounted
50
a screw shell,‘ a center contact and a ring con
tact for engagement by the contacts on the base
of a double ?lament lamp, means capable of
manipulation through said screw shell for se
curing said socket portion and said switch por
tion together and carrying current from said
screw shell and ring contact to certain of said
stationary switch contacts, means holding the
switch parts and socket parts on the insulating
body and base respectively when said securing
means is removed, the switch and the socket por
tions of the device being separable upon removal
of said securing means to form a complete in
dependent switch unit and a complete independ~
65 ent socket unit.
2. A switch and socket device for double ?la
ment lamps, having a switch portion and a socket
portion, said switch portion comprising switch
mechanism including ?xed and movable contacts
for selectively encircuiting the ?laments of the
70 lamp, cooperating insulating bodies enclosing
said switch mechanism, said socket portion com
prising an insulating'body on which are mounted
a screw shell, a center contact and a ring contact
75
for engagement by the contacts on the base of a
ring and center contacts mounted on said body,
internally threaded means associated with said
the reception of feed wire binding screws where 40
by three conductors may be connected with said
contacts if and when said socket portion is used
alone, in combination with a switch portion com
prising a pair of cooperating insulating bodies,
a switch mechanism including conducting ele 45
ments housed within said cooperating bodies and
so constructed and arranged that either one or
both ?laments may be electri?ed, certain con
ducting elements of said switch mechanism being
U-shaped metal stampings having screw-thread 50
ed openings accessible through one of said co
operating bodies, and bolts passing through said
socket portion from the interior and engaging
in said screw-threaded openings to secure said
switch and socket portions together and to con 55
nect said socket contacts and said switch mech
anism electrically.
5. In a switch and socket device for double
?lament lamps, a socket portion comprising an
insulating body, concentric-ally arranged shell, 60
ring and center contacts mounted on said body,
internally threaded means associated with said
shell, ring and center contacts respectively for
the reception of feed wire binding screws where—
by three conductors may be connected with said 65
contacts if and when said socket portion is used
alone, in combination with a switch portion com
prising a pair of cooperating‘insulating bodies,
a switch mechanism including conducting ele~
ments housed within said cooperating bodies and
so constructed and arranged that either one or
both ?laments may be electri?ed, certain con
ducting elements of‘ said switch mechanism be
ing U-shaped metal stampings having screw
threaded openings accessible through one of said 75
4
2,129,597,
cooperating bodies, a resilient member secured
to one of said conducting elements and engag
ing with said center socket contact, and bolts
passing through said socket portion from the
interior and engaging in said screw-threaded
openings to secure said switch and socket por
tions together and to connect said socket con
tacts and said switch mechanism electrically.
6. In a switch and socket device for double
10 ?lament lamps, a socket portion comprising an
insulating body, concentrically arranged shell,
ring and center contacts mounted on said body,
in combination with a switch portion comprising
a pair of cooperating insulating bodies, a switch
mechanism
including
conducting
elements
housed within said cooperating bodies and so
constructed and arranged that either one or both
?laments may be electri?ed, said switch mecha
nism having conducting elements certain of
20 which have contact portions, and certain of said
conducting elements having screw threaded aper
tures adapted to receive screws for securing feed
wires when said switch portion is used alone or,
alternately, to receive bolts for securing said
25 switch portion to said socket portion when said
switch and socket portions are to be used to
gether.
7. In a switch and socket device for double ?la
ment lamps, a socket portion comprising an in
sulating body, concentrically arranged shell, ring
and center contacts mounted on said body, in
combination with a switch portion comprising a
pair of cooperating insulating bodies, a switch
mechanism including conducting elements housed
03 C21 within said cooperating bodies and so constructed
and arranged that either one or both ?laments
may be electri?ed, and bolts passing through
said socket portion from the interior securing
said switch and socket portions together and
40 carrying current between the conducting parts of
said switch and socket portions, said switch
mechanism having conducting elements certain of
which have contact portions, and certain of said
conducting elements having screw threaded aper
tures
adapted to receive screws for securing feed
4,5
wires, when said switch portion is used alone or,
alternately, to receive bolts for securing said
switch portion to said socket portion when said
switch and socket portions are to be used to
50; gether.
8. In a switch and socket device for double
?lament lamps, a socket portion comprising an
insulating body, concentrically arranged shell,
ring and center contacts mounted on said body,
, said center contact being resiliently mounted and
‘having a disc head, internally threaded means
associated with said shell, ring and center con
tacts respectively for the reception of feed wire
binding screws whereby three conductors may be
connected with said contacts if and when said
socket portion is used alone, in combination with
a switch portion comprising a pair of cooperat
ing insulating bodies, a switch mechanism includ
ing conducting elements housed within said co‘
65 operating bodiesv and so constructed and arranged
that either one or both ?laments may be electri
?ed, certain conducting elements of said switch
mechanism having screw-threaded openings ac
cessible through one of said cooperating bodies, '
70 a resilient member secured to one of said conduct
ing elements and forming a self-adjusting con
nection between said element and said central
socket contact, and bolts passing through said
socket portion from the interior and engaging in
said screw-threaded openings to secure said
switch and socket portions together and to con
nect said socket contacts and said switch mecha
nism electrically.
9. In a switch and socket device for double
?lament lamps, a socket portion comprising an
insulating body, concentrically arranged shell,
ring and center contacts mounted on said body,
in combination with a switch portion compris 10
ing a pair of cooperating insulating bodies, a
switch mechanism including conducting elements
housed within said cooperating bodies and so con
structed and arranged that either one or both
?laments may be electri?ed, certain conducting 15
elements of said switch mechanism having screw
threaded openings accessible through one of said
cooperating bodies, and bolts passing through
said socket portion from the interior and engag
ing in said screw-threaded openings to secure 20
said switch and socket portions together and to
connect said socket contacts and said switch
mechanism electrically, and a resilient member
secured to one of said conducting elements and
forming a self-adjusting connection between said 2.5V
elements and said central socket contact.
10. In a switch and socket device for double
?lament lamps, a socket portion comprising an
insulating body, concentrically arranged shell,
ring and center contacts mounted on said body, 30
said center contact being resiliently mounted and
extending through the bottom of said insulating
body and having a disc head and being provided
with an internally threaded recess for the recep
tion of feed wire binding screw, and internally 35
threaded means associated with said shell and
ring contacts respectively for the reception of
feed wire binding screws whereby three conduc
tors may be connected with said contacts if and
when said socket portion is used alone, in combi 110
nation with a switch portion comprising a pair
of cooperating insulating bodies, a switch mecha
nism including conducting elements housed with
in said cooperating bodies and so constructed and
arranged that either one or both ?laments may
be electri?ed, certain conducting elements of said
switch mechanism having screw-threaded open
ings accessible through one of said cooperating
bodies, a resilient member secured to one of
said conducting elements and engaging with said
center socket contact, and bolts passing through
said socket portion from the interior and engag
ing in said screw-threaded openings to secure
said switch and socket portions together and to
connect said socket contacts and said switch
mechanism electrically.
11. A switch and socket device comprising in
sulating base means, switch mechanism including
conducting elements ?xed upon said base means,
a socket body of insulating material having 60
socket contact elements mounted thereon one of
which is depressible with respect to said socket
body, means securing said base means and socket
body together and carrying current between cer
tain of said socket contact and conducting ele
ments, and a resilient conducting means carried
by said base means and extending between said
socket body and base means to form a self-ad
justing current carrying connection between one
of said conducting elements and said depressible 70
socket contact element when said base means and
socket body are assembled.
BENJ. 'C. WEBSTER.
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