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Deco 10, 1946.
‘
c, BRAMMgNG
2,412,439
LAMP SOCKET WITH SIDE SWITCHING MECHANISM
4
Filed June 10, 1944
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INVENTOR.
CHEL BEAM/WING.
ATTORNEY
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Dec. 10, 1946.
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c. BRAMMING ‘
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2,412,439
LAMP SOCKET WITH SIDE SWITCHING MECHANISM
Filed June 10, 1944
3 Sheets-Sheet 2
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' Dec. 10, 1946.
c, @AMWNG
2,412,439
LAMP SOCKET WITH SIDE SWITCHING MECHANISM
Filed June 10, 1944
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INVENTOR.
CARL BEA MM/NG.
v BWMWG. M»
2,412,439
Patented Dec. 10, 1946
vUNITED STATES PATENT OFFICE
2,412,439
LAMP SOCKET WITH SIDE SWITCHING
MECHANISM
Carl Bramming, Anderson, Ind., assignor to The
Mantle Lamp Company of America, Chicago,
111., a corporation of Illinois
Application June 10, 1944, Serial No. 539,757
17 Claims. (Cl. 200—51.14)
1
This invention is an improved construction of
socket for electric lamps, which includes switch
ing mechanism mounted in the side of the socket
construction for controlling the circuit to the
lamp bulb mounted in the socket, as a result of
which the over-all dimension of the socket con
struction axially thereof may be the minimum
required for properly supporting the lamp bulb
and effecting connection between the terminals
of the socket, and the electric conductors used
to supply current to the socket. Heretofore,
switch sockets for lamp bulbs have been provided
2
.
of insulating material having a tubular member
of thin sheet metal to receive and make electrical
contact with the metal sleeve on the base, of the
lamp bulb used with the socket, in a manner
common in lamp socket constructions, the base
being provided with a central contact for en
gaging the central end contact of the lamp bulb
when the lamp bulb is held in place in the socket.
The base of the socket construction is provided
with a side recess in which a switching member
of thin spring metal is mounted for free move
ment axially of the base, the switching member
having
surfaces cooperating with a cam movable
with switching mechanism of one kind or another
relatively to the switching member axially of the
in the base of the socket construction below the
structure employed to receive and support the 15 base, by a button located outside of the shell of
the socket construction, which button is movable
lamp bulb, which has resulted with said earlier
axially oi" the base to operate said cam. The
constructions, in necessarily giving the socket
switching member and cam are constructed so
construction an axial length sumcient to mount
that for the upper position of the button, when
the'lamp bulb and in addition, the extra axial
length required to accommodate the switching 20 viewing the socket in an uprightposition with
the lamp bulb extending above said socket con
mechanism. By the present invention, the ad
ditional axial length required to accommodate the
switching mechanism is eliminated, since the
struction, the switching member is pressed down
wardly into ?rm engagement with the contacts
of the switch structure, one of said switch con
switching mechanism is contained in the side of
tacts being electrically connected with one of the
the socket construction, said switching mecha 25
lamp bulb contacts, and the other of said switch
nism being constructed to quite as effectively
contacts being connected with one of the socket
control the circuit to the lamp bulb as with
terminals
for connection with one of the electric
switch sockets of the kinds heretofore used.
supply conductors, the other of the socket ter
The switching mechanism of the invention in
cludes a switch knob or button outside of the -
enclosing shell of the socket construction, which
button is movable to circuit-closing and opening
positions, said buttons having connection with a
cam of the switching mechanism, cooperating
with a movable switch member of spring construc- I
tion, so arranged relatively to the cam that move
ment of the button to its circuit-opening position
imparts a substantially instantaneous movement
of the switch member away from the switch con
tacts of the switching mechanism to open the
circuit to the lamp bulb, and movement of said
button to its circuit-closing position imparts a
substantially instantaneous movement to said
switch member to' engage and electrically con
nect the contacts of the switching mechanism,
to close the circuit to the lamp bulb. The con
struction of the invention has therefore all of
the advantages of so called “snap” switches, with
out requiring the axial length of the socket con
minals for connection with the supply conduc
tors being electrically connected in the socket
construction with the other of the lamp bulb
contacts.
_
The socket construction not only reduces the
axial height thereof to a minimum, but it accom
plishes the results described by simple means
which may be cheaply produced, without in any
way interfering with the effectiveness of opera
tion of the structure.
The objects of the invention are to produce a
switch socket for use with electric lamp bulbs
constructed as described and having the advan
tages set forth.
The invention will be best understood by ref
i" erence to the accompanying drawings illustrat
ing a preferred embodiment thereof, in which
Fig. 1 shows the assembled socket construction
in plan view,
Fig. 2 shows the structure of Fig. 1 in front
50' elevation,
struction to be greater than that required to sup
Fig. 3 is a sectional view of a part of the struc
port the lamp bulb and to accommodate the con
ture shown in Fig. 1, taken along the line 3-3
nections between the terminals of the socket with
in Fig. 1,
the electrical conductors employed to supply cur
Fig. 4 is a sectional view of the structure shown
rent to the socket.
More speci?cally, the invention provides a base 55 in Fig. 1, taken along the line 6-4 in Fig. 1,
2,412,439
3
4
Fig. 5 is a left-hand side elevation of the struc
ture shown in Fig. 1,
Fig. 6 is a right-hand side elevation of the
structure shown in Fig. 1 with the switch button
removed, this view being taken along the line
raised by movement of the cam l6 below the cam _‘
points l ‘lb, l‘lb of the switching member, alt/which
time the spring action of the member l‘i causes
movement upwardly of the said member, until the
SL6 in Fig. 1,
contact block l‘la is in contact with the upper end
of the recess l to. When the cam it is raised
Fig. 7 is a sectional view of a part of the struc
ture shown‘in Fig. 1 taken along the line 7-1
in Fig. 1,
of the switch member I? holds the contact block ,
above the cam points ll’b, l‘lb, the spring action
Ila down in ?rm electrical contact with the’
switch contacts l8 and l 9.
With the switching member ill in its lower po
sition closing the socket circuit to the lamp bulb
as shown in Fig. 9, when the cam E6 is moved
Fig. 8 is a sectional view of a part of the struc
ture shown in Fig. 4 taken along the line 8-—8
in Fig. ll,v
Fig. 9 is a sectional view of a part of the struc
ture shown in Fig. 4 taken along the line-9—9.
downwardly until'it just passes the cam points;
in Fig. 4, and shows the switching mechanism 15' lib, ll?) of the switching member ‘ll, (Fig. 10),
in its circuit-closing position,
.
the spring action of the member ll immediately
Fig. 10 is a View similar to Fig. 9 showing the
cam of the switching mechanism in its position
snaps said member upwardly and at the same
time moves the cam downwardly and holds said
immediately before the switching member of the
cam in a lower position, the cooperation between
switching mechanism is snapped toward its cir 20 the cam and the spring member ii at that time
cuit-opening position,
holding the switching member inits upper posi
tion shown in Fig. 11, for which the circuit to
Fig. l1.is a view similar to Fig. 9 showing the
switching mechanism in its circuit-opening posi—
tion,
the lamp bulb is open. It will thus be seen that
movement of the cam "l6 upwardly serves to move
the switching member ll downwardly, and that ‘
movement of the cam lit‘ downwardly serves to‘
move the switching member I“! upwardly, or in
, Fig. 12 shows a view similar to Fig. 9, the'cam
of the switching mechanism in its position im
mediately before the switching member is
snapped to its circuit-closing position,
other words, to close the socket circuit, the cam
I6 is moved upwardly and to open the socket cir
the switching mechanism, and are respectively a 30 cuit, the cam it is moved downwardly, for the
front elevation-and a side View thereof, and
relation of the parts shown in Figs. 9-121 inclusive.
r Figs. 15 and 16 are detail Views of the switching
The side walls of the recess llib serve asguide
member of the switchingrmechanism, being re
ways for the switching member l7, said side walls
spectivelya front elevation and a side elevation
being su?iciently spaced to permit lateral expan-.
Figs. 13 and 14 are detail views of the cam of
thereof.
sion of said switching ‘member under the action .
,
of the cam l6.
»
r
Similar numerals refer to similar parts
throughout the several Views.
The base it and the parts secured thereto, as
As showrr in Figs. 1-6 inclusive, the socket con
well as the switching mechanism carried by the '
struction includes a base I 9 of suitable insulating
base, are enclosed ?rst by a tubular sleeve 2E3 of
material such as. porcelain, Bakelite or the like, 40 insulating material (Fig. 4) , and then by a shell
having a cylindrical bore containing a tubular
2| of thin metal around ‘said sleeve, which shell is
member I l of thin sheet metal which is threaded
extended below the base‘ ill to form the necessary \
to engage the corresponding threads on the sleeve
compartment for making connection between the
contacts of lamp bulbs to be used with the socket
construction. The tubular member H is secured
to the base II) by rivets l2 and I3. The base it is
provided at the bottom of the bore containing the
member H, with a central rivet l6 electrically
connected with a contact member 55 extending to
socket terminals and the electric conductors used
to supply current to the socket. The lower end,
a terminal and binding post ltd contained in a
recess lila in the base lli (Figs. 1 and 3). The
base H3 is provided with a second side recess l?b
v
of the shell 2| is formed inwardly and upwardly
and threaded as shown at Zla (Fig. ll), to mount
the socket structure on any desired support. A
perforated disc 22 of insulating material is pref
‘ erably disposed in the lowerportion of the shell
2l to prevent contact between said shell and the
electric conductors used in connecting the socket
(Figs. 1, 4 and 6) containing the switching mech
terminals with the supply circuit. 7
anism ofthe structure. , ;
The cam It has threaded engagement with a
screw 23 which is permanently a part of a but
l the
.Asswitching
more clearly
mechanism
shown of
in the
Figs.socket
9-12 construc
inclusive,
ton 21; mounted outside of the shell 25,
tion includes a cam iii of suitable material, for ex
ample metal or insulating material, and a switch
ing member l'l together with switch contacts l8
and .l 9 mounted on the lower end of the base It for
electricalengagement with a contact block lid of
the switching member I’! when the latter is in its
lowermost position indicated in Figs. 9 and 10.
‘The cam I6 is substantially cylindrical for coop
eration with opposite cam points lib, llb of the
switching member ll. The switching member ll
on
T
'
refer
a'bly by molding the material of i the button
around said screw, (Fig. 4), so that the cam l5
may be moved as above described by corresponde
ing movement of‘ the button 241. The button 24‘ ‘
is provided with a shouldered portion 24a (Fig.
4) which passes through :a corresponding slot 25
(Fig. 6) in the sleeve 2% and a similar slot in the
shell 2l. Movement of the button 24‘, upwardly
relatively to the shell 2i is limited'by the recess,
l?b, and movement downwardly of said button
is of thin spring metal and is in the general form
is limited by the slot 25. The cam 15 is secured
of a U.(Figs. 15 and Y16), so that its upper ends
to a shield portion lta (Figs. 13 and lil) prefer- "
‘may move towards each other by its spring ac»
ably of insulating material covering the recess .
tion, or be separated by the action of the cam 70 lilb and also the slot 25 for different positions‘
, lathe lower mideportion of said switching mem
of the cam relatively to the base' it. ‘The shield
ber having secured thereto the contact block I la.
The recess lilb is provided with a further recess‘
liic foritheblock l To for engagement with the
IE0; is contained‘ in a shallow recess i ii in the base
H), the side edges of said recess forming guide-r ,
ways for said shield duringmovementcf thelat- V
‘end of said block, when said switching member is 75. ter with the cam l6.
2,412,439
, ,
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The switch contact I9 is electrically connected
by the rivet IS with the tubular member I I (Figs.
1 and 8), and the switch contact i8 is extended
along the bottom of the base l0 and is integrally
a part of the termina1 and binding post 26 con
tained in a side recess we in the base It, said
switch contact 58 having an extension its by
6
for receiving and supporting a lamp bulb having
electric terminals, said base having a ?rst side
recess for switching mechanism, a cam mounted
in said ?rst side recess for reciprocatory move
ment axially of said socket, a switching member
in said ?rst side recess and having a projection
pressing against said cam and restricted to recip
rocatory movement axially of said socket, said
which the contact is rigidly secured to the base
?rst side recess opening outwardly'through the
by means of a rivet 21 (Figs. 1, 7 and 8).
The base Ii! is held in place in the shell 2! by 10 side of said base and also axially through the
end of said base remote from its said end recess,
means of an inwardly extending formed lug 2lb
switch contacts spaced from each other and
engaging a bayonet groove l0)‘ in the side of the
mounted on the said remote end of said base and
base l0 (Figs. 4 and 5).
ending in line with said ?rst side recess, the inter
The socket construction described, reduces the
height of the structure to that required for re 15 engaging portions of said cam and of said switch
ing member effecting axial movement of said
ceiving and supporting a lamp bulb and for con
switching member in a direction opposite to the
necting the socket terminals with electric supply
direction of axial movement of said cam, a re
conductors. This is a marked advantage where
movable casing surrounding said base, an oper—
it is desired to use switch sockets with small lamp
standards such as boudoir lamps, because of de 20 ating button outside of said casing and connected
with said cam, said casing having an axial slot
tracting but little if at all from the effect of the
therethrough for receiving said button connec
designs of such standards, and because of keeping
tion, said base having electric contacts for engag
the lamp bulbs in a low position relatively to the
ing said bulb terminals, socket terminals in addi
standards, both of which effects are of the great
est importance in connection with portable elec 25 tional side recesses in said base spaced from each
other and from said ?rst side recess, said switch
tric lamps. At the same time, the switching
contacts having electrical connection with one
mechanism of the invention is of simple and
of said base contacts and with one of said socket
inexpensive construction, free from complication,
terminals respectively, and the other of said
and most effective in operation.
While I have shown my invention in the par 30 socket terminals having electrical connection
with the other of said base contacts, said switch
ticular embodiment described, I do not limit
ing member in one of its positions electrically
myself thereto as I may employ equivalents
connecting said switch contacts and by movement
thereof without departing from the scope of the
to its other position breaking electrical connec
appended claims.
Having thus described my invention, what I 35 tion between said switch contacts, and a shield
connected with said cam and covering said slot.
claim is:
3. A switch socket including in combination a
l. A switch socket including in combination a
base of insulating material having an end recess
base of insulating material having an end recess
for receiving and supporting a lamp bulb having
for receiving and supporting a lamp bulb having
electric terminals, said base having a ?rst side
electric terminals, said base having a ?rst side
recess for switching mechanism, a cam mounted
recess for switching mechanism, a cam mounted
in said ?rst side recess for reciprocatory move
ment axially of said socket, a switching member
in said ?rst side recess and having a projection
pressing against said cam and restricted to recip- i
in said ?rst side recess for reciprocatory move
ment axially of said socket, a switching member
in said ?rst side recess and having a projection
rocatory movement axially of said socket, said
?rst side recess opening outwardly through the
side of said base and, also axially through the
end of said base remote from its said end recess,
switch contacts spaced from each other and a
mounted on the said remote end of said base and
ending in line with said ?rst side recess, the inter
engaging portions of said cam and of said switch
ing member effecting axial movement of said
switching member in a direction opposite to the ,
direction of axial movement of said cam, a re
movable casing surrounding said base, an oper
pressing against said cam and restricted to recip
rocatory movement axially of said socket, said
?rst side recess opening outwardly through the
side of said base and also axially through the end
of said base remote from its said end recess,
switch contacts spaced from each other and
mounted on the said remote end of said base and
ending in line with said ?rst side recess, the inter
engaging portions of said cam and of said switch
ing member eiiecting axial movement of said
switching member in a direction opposite to the
direction of axial movement of said cam, a re
movable casing surrounding said base, an oper
ating button outside of said casing and connected
ating button outside of said casing and connected
with said cam, said casing having an axial slot
with said cam, said casing having an axial slot
therethrough for receiving said button connec 60 therethrough for receiving said button connec-»
tion, said base having electric contacts for en
tion, said base having electric contacts for en
gaging said bulb terminals, and socket terminals
gaging said bulb terminals, and socket terminals
in additional side recesses in said base spaced
in additional side recesses in said base spaced
from each other and from said ?rst side recess,
from each other and from said ?rst side recess,
said switch contacts having electrical connection
said switch contacts having electrical connection
with one of said base contacts and with one of
said socket terminals respectively, and the other
of said socket terminals having electrical con
nection with the other of said base contacts, said
switching member in one of its positions electri- -*
cally connecting said switch contacts and by
movement to its other position breaking electrical
connection between said switch contacts.
2. A switch socket including in combination a
base of insulating material having an end recess
with one of said base contacts and with one of
said socket terminals respectively, and the other
of said socket terminals having electrical connec
tion with the other of said base contacts, said
switching member in one of its positions elec
rically connecting said switch contacts and by
movement to its other position breaking electrical
connection between said switch contacts, said
switching member having opposite portions press
2,412,439.
7
~
ing with equal forces against opposite sides of
said cam.
‘
4. A switch socket including in combination a
base of insulating material having an end recess
for receiving and supporting a lamp bulb having
electric terminals, said base having a ?rst side
recess for switching mechanism, a cam mounted
in said ?rst side recess for reciprocatory move
8
nectiOn with theother of said base contacts, said
switching member in one of_ its positions electri
cally connecting said switch contacts and by
movement to its other position breaking electri
cal connection between said switch‘contactasaid
casing extending around said remote end of said
base with an end clearance restricted to thatre
quired for electric supply conductors connected
ment axially of said socket, a switching member
in said ?rst side recess and having a projection
with said socket terminals.
pressing against said cam and restricted to re
base of insulating material having an end recess
1
6. A switch socket including in combination a
ciprocatory movement axially of said socket, said
for receiving and supporting a lamp bulb hav- '
?rst side recess opening outwardly through the
ing electric terminals, said base having a ?rst
sideof said base and also axially through the end
side recess for switching mechanism, a, cam
of said base remote from its said end recess, 15 mounted in said ?rst side recess for reciprocatory
switch contacts spaced from each other and
movement axially of said socket, a switching
mounted on the said remote end of said base and
ending in line with said ?rst side recess, the in
terengaging portions of said cam and of said
projection pressing against said cam and re
switching member effecting axial movement of
said socket, said ?rst side recess opening out- 7'
said switching member in a direction opposite to
the direction of axial movement of said cam, are
movable casing surrounding said base, an oper
member in said ?rst side recess and having’a
stricted to reciprocatory movement axially of
Wardly through the side of said base and also
axially through the end of said base remote from.
its said end recess, switch contacts spaced from
ating button outside of said casing and connected
each other and mounted on the said remote end
with said cam, said casing having an axial slot 25 "or" said base and ending in line with said ?rst
therethrough for receiving said button connec
side recess, the interengaging portions of said‘,
tion, said base having electric contacts for engag
cam and of said switching member effecting axial
ing said bulb terminals, and socket terminals in
movement of said switching member in a direc
additional side recesses in said base spaced from
tion opposite to the direction of axial movement
each other and from said ?rst side recess, said 30 of said cam, a removable casing surrounding said
switch contacts having electrical connection with
base, an operating button outside of said cas
one of said base contacts and with one of said
ing and connected with said cam, said casing hav
socket terminals respectively, and the other of
ing an axial slot therethrough for receiving said
said socket terminals having electrical connection
button connection, said base having electric con
with the other of said base contacts, said switch 35 tacts for engaging said bulb terminals, and socket
ing member in one of its positions electrically
terminals in additional side recesses in said base
connecting said switch contacts and by movement
spaced from each other and from said ?rst side
to its other position breaking electrical connec
recess, said switch contacts having electrical con
tion between said switch contacts, said switching
vnection with one of said base contacts and with
member having opposite portions provided with
one of said socket terminals respectively, and
similar projections extending towards each other,
the other of said socket terminals having electri
and said cam having opposite cam surfaces for
engaging said switching'member projections.
5. A switch socket including in combination a
base of insulating material having an end recess
for receiving and supporting a lamp bulb having
electric terminals, said base having a ?rst side
cal connection with the other of said base con
tacts, said switching member in one of its posi
tions electrically connecting said switch contacts
and by movement to its other position breaking
electrical connection between said switch con
tacts, said switching member comprising a metal
strip bent into a U shape and a contact block
carried, by its mid-portion for engaging said
in said ?rst side recess for reciprocatory move
ment axially of said socket, a switching member 50 switch contacts, said switch member having its
in said ?rst side recess and having a projection
side members on opposite sides of and for en
gagement with said cam.
’
pressing against said cam and restricted to re‘
recess for switching mechanism, a cam mounted
ciprocatory movement axially of said socket, said
?rst side recess opening outwardly through the
v 7. A switch socket. including in combination a
base of insulating material having an end recess
for receiving and supporting a lamp bulb, said
base having a side recess for switching mecha
nism,'a cam mounted in said side recess for
reciprocatory movement axially of said socket, va
switching member in said side recess and having
side of said base and also axially through the
end of said base remote from its said end recess,
switch contacts spaced from each other and
mounted on the said remote end of said base and
ending in line with said ?rst side recess, the in
terengaging portions of said cam and of said 60 a projection pressing against said cam and re
switching member effecting axial movement of
stricted to reciprocatory movement axially of said
said switching member in a direction opposite to
socket, switch contacts spaced from each other
the direction of axial movement of said cam, a
and ‘mounted onsaid base and ending-in line
removable casing surrounding said base, an op
with said side recess, the interengaging portions
erating button outside of said casing and con 65 of said cam and of said switching member effect
nected with said cam, said casing having an axial
ing axial movement of said switching member
slot therethrough for receiving said button con
in a direction opposite to the direction of axial
nection, said base having electric contacts for
movement of said cam, and an operating button
engaging said bulb terminals, and socket termi
connected with said earn, said switch contacts
nals in additional side recesses in said base spaced '
having electrical connections for controlling cur
from each other and from said ?rst side recess,
rent ?ow through a lamp bulb in said end recess,
said switch contacts having electrical connection
said switching» member in one of its positions
with one of said base‘ contacts and with one of
electrically connecting said switch contacts and
said socket terminals respectively, and the other ‘
of said socket terminals having electrical con
by movement to its other position breaking elec
75 trical connection between said switch contacts.
2,412,439
e 8. A switch socket including in combination a
base of insulating material having an end recess
for receiving and supporting a lamp bulb, said
base having a side recess for switching mecha
nism, a cam mounted in said side recess for re
ciprocatory movement axially of said socket, a
switching member in said side recess and having
a projection pressing against said cam and re
10
movement to its other position breaking electrical
connection between said switch contacts, and a
removable casing around the side and around the
end of said base remote from its said end recess
and having an end clearance from said remote
end restricted to that required for electric supply
conductors.
‘
11. A switch socket including in combination a
base of insulating material having an end recess
stricted to reciprocato-ry movement axially of said
for receiving and supporting a lamp bulb, said
socket, switch contacts spaced from each other 10 base having a side recess for switching mecha
and mounted on said base and ending in line
nism, a cam mounted in said side recess for recip
with said side recess, the interengaging portions
rocatory movement axially of said socket, a
of said cam and of said switching member eiiect
switching member in said side recess and having
ing axial movement of said switching member
a projection pressing against said cam and re
in a direction opposite to the direction of axial 15 stricted to reciprocatory movement axially of said
movement of said cam, and an operating button
socket, switch contacts spaced from each other
connected with said cam, said switch contacts
and mounted on said base and ending in line with
having electrical connections for controlling cur
said side recess, the interengaging portions of
rent flow through a lamp bulb in said end recess,
said cam and or” said switching member effecting
said switching member in one of its positions 29 axial movement oi said switching member in a
electrically connecting said switch contacts and
direction opposite to the direction of axial move
by movement to its other position breaking elec
ment of said cam, and an operating button con
trical connection between said switch contacts,
nected with said cam, said switch contacts having
said switching member having opposite portions
electrical'connections for controlling current ?ow
pressing with equal forces against opposite sides 25 through a lamp bulb in said end recess, said
of said cam.
9. A switch socket including in combination a
base of insulating material having an end recess
for receiving and supporting a lamp bulb, said
base having a side recess for switching mecha 30
switching member in one of its positions elec
trically connecting said switch contacts and by
movement to its other position breaking electrical
connection between said switch contacts, said
switching member comprising a metal strip bent
nism, a cam mounted in said side recess for re
into a U-shape and provided at its mid-portion
with a contact block for engaging said switch
contacts and having its side members on opposite
sides of and in engagement with said cam.
stricted to reciprocatory movement axially of said 35
12. Switching mechanism for electric lamp
socket, switch contacts spaced from each other
sockets, including in combination a cylindrical
and mounted on said base and ending in line
base of insulating material having an end recess
with said side recess, the interengaging portions
for a lamp socket and a wall extending laterally
of said cam and of said switching member effect
at the inner end of said socket recess limited in
ing axial movement of said switching member 40 thickness to that required for mounting a lamp
in a direction opposite to the direction of axial
socket in said socket recess, the axial length of
movement of said cam, and an operating button
said base being limited to the combined axial
connected with said cam, said switch contacts
length of said socket recess and the thickness
having electrical connections for controlling cur
of said end wall, said base also having a side
rent ?ow through a lamp bulb in said end recess,
recess opening laterally through the side of said
said switching member in one of its positions elec
base, spaced switch contacts in line with said
trically connecting said switch contacts and by
side recess, a switching member contained in said
movement to its other position breaking electrical
side recess and movable therein to electrically
connection between said switch contacts, said
connect and electrically separate said switch con
switching member having opposite portions pro
ciprocatory movement axially of said socket, a
switching member in said side recess and having
a projection pressing against said cam and re
vided with similar projections extending towards
each other, and said cam having opposite cam
surfaces for engaging said switching member
projections.
10. A switch socket including in combination a
base of insulating material having an end recess
for receiving and supporting a lamp bulb, said
base having a side recess for switching mecha
nism, a cam mounted in said side recess for recip
rocatory movement axially of said socket, a
switching member in said side recess and having
a projection pressing against said cam and re
stricted to reciprocatory movement axially of
said socket, switch contacts spaced from each
other and mounted on said base and ending in line
with said side recess, the interengaging portions
of said cam and or" said switching member effect
ing axial movement of said switching member in
a direction Opposite to the direction of axial move
ment of said cam, an operating button connected
with said cam, said switch contacts having elec
trical connections for controlling current ?ow
through a lamp bulb in said end recess, said‘
switching member in one of its positions elec
tacts as desired, and a cam contained in said
side recess and movable therein to operate said
switching member, said switching member hav
ing opposite portions provided with similar pro
jections extending towards each other, and said
cam having opposite cam surfaces for engaging
said switching member projections.
_ 13. Switching mechanism for electric lamp
sockets, including in combination a cylindrical
base of insulating material having an end recess
for a lamp socket and a wall extending laterally
at the inner end of said socket recess limited in
thickness to that required for mounting a lamp
socket in said socket recess, the axial length of
said base being limited to the combined axial
length of said socket recess and the thickness
of said end wall, said base also having a side
recess opening laterally through the side of said
base, spaced switch contacts in line with said side
recess, a switching member contained in said side
recess and movable therein to electrically connect
and electrically separate said switch contacts as
desired, and a cam contained in said side recess ,
and movable therein to operate said switching
trically connecting said switch contacts and by 75 member, said switching member comprising a
2,412,439
11
-
metal strip bent intca U shape and provided at
itsmid-portion with a contact block forrengaging
said switch, contacts and having its side members
on opposite sides of and in engagement with said
cam.
.
1‘2
.
t
r
and being limited in its movement solely by said
cam, by the walls ‘of said side recess and by said
switch contacts.
16. Switching mechanism, for electric lamp
sockets, including ‘in’ combination a, cylindrical
base of insulating material having an endrecess
V
7 l4. Switching mechanism for electric lamp
sockets, including in combination a cylindrical
for a lamp socket and a wall extending laterally
base of insulating material having an end recess
at the inner end of said socket recess limited in
fora lamp socket and a wall, extending laterally
thickness to that required for mounting a lamp
at the inner end of said socketrecess limited in 10 socket in said socket recess, the axial length of
thickness to that required for mounting a lamp
said base being limited to the combined, axial
socketin said socket recess, the axial length of
length of said socket recess and the thickness of
said base being limited to the combinedaxial
length of saidsocketrecessand thethickness of
said end wall, said base also having 'a side recess
opening laterally through the side of said base,
said end wall, said base also, having a side recess 15 spaced switch contacts in line with said side re
cess, a switching member contained in said side
spaced switch contacts in line withsaid sidere
recess and movable therein to electrically con
cess, a switching member contained in said side
nect and electrically separate said switch con
recess andmovable therein to electrically connect
tacts as desired, and a' cam contained in said side
and electrically separate said switch contacts ‘as 20 recess and movable therein to operate said
desirectand. a‘ cam contained in said, side recess
switching member, said switching member being
and movable therein to operate said switching
free from connection with said base and'with
ember, said switching member comprising a
said cam and being limited in its movement sole
strip.v of thin spring metalbent to engage ‘opposite
ly, by said cam, by the walls of said side recess and
sidesof saidcam with equal pressures and pro 25 by said switch contacts.
’ '
i ' ‘
vided with a contact block to cooperate with said
I 1?. Switching mechanism for electric lamp
switch contacts.
sockets, including in combination a cylindrical
15.. Switching mechanism for electric lamp
base of insulating material having an end recess
opening laterally through the side of, said base,
sockets,
including in combination a cylindrical '
for a lamp socket and‘ a wall’ extending‘laterally
base of insulating material having an end recess 30 at, the inner end of said socket recess limited in, '
for a lamp socket and a wall extending laterally
thickness to that required‘for mounting a lamp
at the inner end of said socket recess limited in
socket in said socket recess, the axial length of
thickness to, that required for mounting a lamp
said base being limited to the combined axial
socket in said socket recess, the axial length of
length of said socket recess and the thickness of
said. base being limitedto the combined axial 35 said end Wall, said base also havingaside recess
length of said socket recess and the thickness of
said end wall, said base also. having a side recess
opening laterally through the side of said base,
spacedv switch contacts in line with said side re.
cess, a switching, member contained in, said side 40
recessand movable therein to electrically connect
tacts as'desiredand a camcontained in said side
and, electrically separate said switch. contacts as
recess and movable thereinhto operate said
desired, and a_ cam contained in said side recess
and movable therein to operate said switching
memberksaid switching member comprising a
strip ofthin springvmetalbent to engage opposite
sidesiof.saidcamnwith, equal pressures and pro.
vid dwith a contact block. to cooperate with said
opening laterally through the side of said base,
spaced switch contacts in‘ line withv said side rye-r
cess, a switching member contained in said side
recess and movable therein to electrically} con
nect and electrically separate said switch con
‘Snitching. membén said Switching memberand
said cam; being limitedto“ reciprocatory- move
as ,vl
switchgcontacts, said switching member being free
froinponnection with said base and with saidcam 50
merit towards andfromsaid switch contacts, said ,
‘Switching member and;
_
said, cam
having cooper
ating engaging surfaces moving said switching
member in a direction’ opposite to the direction
of movement of said cam.
V
CARL, BRAMMING.
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