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Патент USA US2110132

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March ’8,' 1938.
’
H. A. DOUGLAS
2,110,132
ELECTRIC LAMP UNIT
Filed March 17, 1954
2 Sheets-Sheet 1
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H. A. ‘D-OUGLAS
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2,110,132
ELECTRIC LAMP UNIT
Filed March 17, 1934
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HARRY A. DouqLAs:
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‘Patented Mar.
1938
2,110,132
UNITED STATES
PATEN T OFFICE
2,110,132
ELECTRIC LAMP UNIT
Harry A. Douglas, Bronson, Mich” assignor to
Kingston Products Corporation, a corporation
of Indiana
Application March 17, 1934, Serial No. 716,207
12_ Claims. (Cl. 240-41)
My invention relates to electric lamp units,
and particularly to electric lamp units compris
prising a body 30, which may be of parabolic‘ form,
and which is provided at its rear with an integral
rearwardly extending tubular section 3| partially
closed by an integral annular ?ange 32 extend
principal object of my.invention is to provide ing
radially inwardly from the rear edge of the 5
a new and improved unit of this type. This ap
tubular section 3|. The ?ange 32 is provided
plication is a continuation in part of my appli
centrally with an aperture 33 adapted to receive
cation Serial Number 713,'714, ?led March 2, ‘the lamp base 20, and at points spaced about the
1934. In the drawings accompanying this speci
central, aperture 33 is provided with three bayo
?cation, and forming a part of this application, net slots 34. Intermediate the slots 34 the ?ange 10
I have shown, for purposes of illustration, cer
32 consists of surfaces 35 lying in a single plane
tain forms which my invention may assume; perpendicular to the axis of the unit and adapted
in these drawings:
.
ing an incandescent electric lamp mounted in a
re?ector, as in an, automobile headlight, and the
0
Figure 1 is a longitudinal sectional view of one
embodiment, showing the lamp in ‘elevation,
Figure 2 isva' fragmentary front view of the
re?ector,
‘
Figure 3 is a front elevational view of the
socket unit,
20
'
Figure 4 is a view showing the socket unit
assembled with the re?ector, _
Figure 5 is a section through the lamp, on the
~25
line 5-5 of Figure 1,
Figure '6 is a view similar to Figure-4, but
showing the lamp assembled with the socket and
the re?ector,
,
_
Figure 7 is a detail section, on the line 1-1 of
Figure 6, while
'
Figure 8 is a view similar to Figure 1, show
30 ing another embodiment.
-
The embodiment of my invention disclosed in
Figures 1 ‘through ‘Tcomprises a lamp I I of the
two-?lament type, having a ?rst ?lament l4
mounted between a common post l5 and a ?rst
35 selective post It, and positioned in focus, for so
called bright light, and a second ?lament 11,
mounted between the common post l5 and a sec
ond selective post 18, and positioned above the
focal point, for so-called dim ‘light. The three
40 posts l5 and I8 and III are supported in the
usual glass body l9, mounted in the lamp base
20, to which is secured the usual bulb 2|, and
the common post I5 is grounded to the exterior. shell 22 of the lamp base 2|], while the selective
45 posts I 6 and I8 are secured respectively to the
contacts 23 and 24, carried by and projecting
from the rear face of the lamp base 20.
Secured to the lamp base outer shell 22 is the
tubular portion 25 of a positioning ring 26 which
to be engaged by the positioning ring projections '
23.
’
Receiving the rear of the lamp base 20 is a 15
socket unit 13 comprising a cylindrical shell 36
provided at its forward end with an integral
outwardly extending annular ?ange ‘31 provided
with three apertures 38 through which extend
the shanks 39 of three pins 40 provided at their 20
forward ends with enlarged heads 4| and at their
rear ends with swedged enlargements 42 by which
the pins 40 are held against withdrawal from
the ?ange 31.
Joining the three pins 40 is‘an annular disk 25
43 abutting the rear face of there?ector ?ange
32 and provided with three apertures 44 closely
receiving the shanks 39 of the three socket pins
40, and'provided on the disk 43 are three resilient
loops 45 each provided near its free end with an 3-0
aperture 46 receiving a cooperating projection
41 extending from the socket ?ange 31.
The shell 35 is provided at its rear end with
three integral ?ngers 48 forming a seat in which
is received an insulating base 49 substantially 35
closing the rear end of the shell 36 and held
between radially inwardly extending tips 50 on
the ?ngers 48 and an inwardly extending ?ange
5| formed on the rear end of the shell 36 in
termediate the ?ngers 48.
40
Slidably mounted in the insulating base 49
are two terminal rods 52, which are connected
to conductors 53 leading to the control switch,
as is well known in the art, and are provided.
at their forward ends with heads 54 adapted to 45
contact the terminals 24 and 23 ot the lamp base
20 and pressed into ?rm engagement with the
lamp base terminals 24 and 23 by springs 55
encircling the terminal rods 52 and compressed .50 comprises also an outwardly extending ?ange 21' between the insulating base 49 and the ter- 50
provided with three bayonet slots 28, spaced
about the periphery of the lamp base 20, and pro
vided also, on its rear face, intermediate the
' slots 28, with three positioning projections 29.
55
Receiving the lamp II is a re?ector l2, com
minal heads 54.
i
.
'
Each of the positioning ring bayonet slots 28
comprises an entrance 56 adapted to receive a pin
head 4|, a seat 51 adapted to closely receive a pin
shank 39, and a connecting portion 58 connect- 55
2
2,110,132
ing the entrance 56 to the seat 51. Each of the
re?ector ?ange bayonet slots 34 comprises an en
trance 59 adapted to receive a pin head 4|, and a
seat 69 adapted to closely receive a pin shank 39.
Also provided in the pin connecting disk 43
are three lugs 6|, adaptedto be received in the
entrances 59 of the re?ector ?ange bayonet slots
34 when the pin shanks 39 are in the seats 89
of the slots 34.
.
The socket pins 49, and the pin positioning
10
disk 43, may be positioned with the socket shell
36 by springing the resilient loops 45 to posi
tion the ?ange projections -41 within the loop
apertures 46, and by then inserting the pins 49
15 through the apertures 44 of the disk 43, and
throughthe apertures 39 of the ?ange 31, and
then swedging the ends of the pins 49, to pro
vide the enlarged rear ends 42 holding the pins
in position and the parts assembled. 'The in
20
sulating base 49 may conveniently be assembled
with the shell 36 by positioning it against the
inwardly extending ?ange 5| before the inwardly
extendingends 59 of the ?ngers 48 have been
inturned.
25
The entire socket unit I3 is assembled with the
re?ector I2 by inserting the pin heads 4| through
the entrances 59 of the bayonet‘ slots 34 in the
?ange-32 of the re?ector i2, and rotating the
socket unit l3 relative to the re?ector l2, until
30 the pin shanks 39 seat inthe seats 60 of the
bayonet slots 34, at which time the detent lugs
6| of disc 43 will snap into the entrances 159 of
‘ the slots 34, to releasably hold the socket unit
i3 assembled with the re?ector l2.
35
To assemble a lamp H in a re?ector I21, the
lamp II is inserted, with the entrances 56 of
,the bayonet slots 28 registering with the heads
4| of the pins 49, and then the lamp II is rotated,
to bring the pin shanks 39 into the seats 51 of
'
,
.
By the use of three projections 29, spaced about
the, periphery of the lamp base 29, the lamp will
be held ?rmly positioned, against any tilting, and
by forming the bayonet connections unequally
spaced, as herein shown, the construction will
be such that the lamp can be inserted in only the
one proper position.
From the foregoing it will be apparent to those
skilled in the art that this embodimentot my
invention provides a new and improved lamp as
10
sembly, accurately positioning the lamp, and
readily and conveniently constructed, and accord
ingly, accomplishes at least the principal object
of my invention. On the other hand, it also will
be obvious to those skilled in the art that this 15
particular embodiment of my invention may be
variously changed and modi?ed, without depart- ‘
ing from the spirit of my invention, or sacri?cing
the advantages thereof.
'
For example, certain of the advantages are re 20
tained in the construction shown in Figure 8.
In this construction there is no re?ector, and
the socket unit is supported directly, as by a
suitable support supporting the disk 43, and the
lamp positioning ring 26 abuts directly against 25
and is registered directly from the disk 43.
Other modi?cations may be made, and in
general, the disclosure herein is illustrative only,
and my invention is not limited thereto.
I claim:
_
1. In combination:
v30
-
an incandescent electric
lamp, having'a. base; a. re?ecting unit for said
lamp; positioning means for said lamp, whereby
said base and said re?ecting unit are adapted to
be brought into register at a plurality of points 35
disposed about‘ the axis of said base; means,
‘comprising a unit detachably mounted on said
re?ecting unit by relative rotation of said units.
having parts engaging said positioningmeans,
for pressing said positioning means into said 40
40 the bayonet slots 28, with the pin heads 4| over- ,
lying the adjacent walls of the lamp positioning
?ange 21, whereupon the spring loops 45, acting
through the socket shell 36 and the pins 49, urge
the projections 29 of the positioning ring ?ange
21 into tight engagement with the forward face
of the re?ector ?ange 32. Concurrently, the
springs 55 hold the socket contacts 54 in ?rm .
engagement with ,the lamp base contacts 24
and 23._
50
To assure that any lamp II will be accurately
positioned in any re?ector'i2, each re?ector I2 is
made accurately to gauge, entirely uniform for
all practical purposes, and each lamp is placed
in a standard, while its positioning ring "is still
55 free, and accurately positioned, with the pro
‘ J'ections 29 of the positioning ring ?ange 21 in
' ?rm engagement with the part of the standard
register with said re?ecting unit; a plate, form
ing part of said detachable unit, based on said re
?ecting unit; and a projection on said plate, ex
tending toward said re?ecting‘ unit, and cooper
able with said re?ecting unit to hold said de 45
tachable unit in mounted position.
'
,
2. In combination: an incandescent electric
lamp, having a base; a re?ecting unit for said
lamp; positioning means for said lamp, whereby
said base and said re?ecting unit are adapted to .50
be brought into register at a plurality of spaced
points disposed ‘about the axis of said base;
means, comprising a unit detachably mounted on’
said re?ecting unit, having ‘parts engaging said
positioning means, for pressing said positioning
means and re?ecting unit into said register; said
detachably mounted unit being mounted on said
corresponding to the re?ector ?ange 32, and the re?ecting unit by bayonet connection means,
seated by rotation relative to said re?ecting unit
positioning ring 26 is then secured in ?xed posi
0 tion on the lamp base 29, while the parts are so_. substantially about the axis of said detachably 60
mounted unit; a plate, forming part of said de
held, as by soldering 62.
,
To prevent partial insertion of a lamp II, that tachable unit, based on said re?ecting unit; and
is, engagement of the positioning ring ?ange 21 a. projection on said plate, extending toward saidv
under part but not all of the pin heads 4|, and re?ecting unit, and cooperable- with, said re?ect
65 the cocked positioning oi’ the lamp II that would ing unit to hold said detachable'unit in mounted
'result therefrom, the pin heads 4| are prefer
3. In oombinationz‘ an incandescent electric
ably provided with extensions as shown, of a.
diameter greater than that of the seats 51 of lamp, having a base; a re?ecting unit'for said
the positioning ring ?ange bayonet slots 28 and » lamp; said re?ecting- unit having circumferen
projecting to an extent such that the ?ange 21 Utially spaced bayonet slots having their entrance 70
' cannot be positioned beneath any of the pin heads .. portions. spaced circumferentially from their seat
4| without the other pin heads 4| extending into portions; -._positioning means for. said lamp, ex
the ?ange slots 28 to prevent seating rotation of - tending laterally from said base, whereby said
the lamp || until the ?ange21 is properly ‘posh; base" and said re?ecting unit are adapted to. be
~ brought into register at a plurality‘ of spaced 75
75 tioned below all of the pin heads 4|.
position.
.-
-
.
'
2,110,132
points disposed about the axis of said base; said
positioning means containing a plurality of
bayonet slots disposed about the axis of said base;
. means, comprising a unit detachably mounted on
said re?ecting unit, having parts engaging said
$1
positioning means, for pressing said positioning
means and said re?ecting unit into said register;
said parts, and said slots in said positioning
means, being constructed and arranged to make
bayonet connection with each other; and said
detachably mounted unit being so constructed
and- arranged that said parts make bayonet con
3
portions with said entrance portions; holding
'means, having projections provided with heads a
adapted to pass through said entrance portions of
said slots and large enough to become seated on
the margins of said seat portions, constructed
‘and arranged to hold said lamp connected to said
re?ecting unit and to press said positioning
means into said register with said re?ecting unit
when said holding means and said positioning
means are operatively assembled so that said 10
heads are seated on said seat portions; said po
sitioning means and said heads being so con
nection with said slots in said re?ecting unit and ' structed and arranged that they are so oper
are seated by rotation relative to said re?ecting
15 unit substantially about the axis of said detach
ably mounted unit.
'
.
4. In combination: an incandescent electric
lamp, having a base; a re?ecting unit for said
20
lamp; said re?ecting unit having circumferen
tially spaced bayonet slots having their entrance
. portions spaced circumferentially from their seat
portions; positioning means for said lamp, ex
tending laterally from said base, whereby said
base and said re?ecting unit are adapted to be
25 brought into register at a plurality of spaced
points disposed about the axis of said base; said
positioning means containing a plurality of slots
disposed about the axis of said base; means, com
prising a unit detachably mounted on said re
30
?ecting unit, having parts engaging said posi
tioning means for pressing said positioning
means and said re?ecting unit into said register;
said parts and said slots in said positioning means
35
being constructed and arranged to make bayonet
connection with each other; said detachably
mounted unit being so constructed and arranged
that said parts make bayonet connection with
said slots in said re?ecting unit and are seated
by rotation relative to said re?ecting unitsub
40 stantially about the axis of said detachably
mounted'unit; and means for releasably holding
said detachably mounted unit against detaching
rotation.
‘
‘
‘
5. The combination with a re?ecting unit, of a
45 unitary device to which an incandescent electric
lamp may be connected, said device comprising:
a plurality of connector projections; a carrying
member, carrying said projections; said projec
tions being spaced from each other and extend—
50 ing in the same general direction away from said
carrying member; said projections having. heads
said plurality of points and underlies one only of
said heads, another of said heads will prevent 20,
such rotation by engagement of the side surface
thereof with the margin of an intermediate por
tion of one ,of said bayonet slots.
7. Securing means for holding an incandescent
electric lamp to a mounting, comprising a unitary 25
article of manufacture connectible to and sep
arable as a unit from the mounting, said unitary
article including: a plurality of connector pro
jections; a carrying member, carrying said pro
jections; said projections being spaced from each' 30
other and extending in the same general direction
away from said carrying member; said projec
tions having heads at their ends r‘emotest from
said carrying member; a washer member having
apertures, smaller than said heads, through 35
which said projections are slidably disposed; and
means, including a resilient part integral with
said washer ‘member, constructed and arranged
to bias said washer member against said heads of
said projections.
8. A lamp assembly, comprising: an incandes
cent electric lamp, having a base; a re?ector unit
means adapted to be brought into register, with
said re?ector unit at a plurality of places spaced 45
about the axis of said base; -a pressing unit, de
tachably connected to said re?ector unit, com
prising parts engaging said positioning means,
and so constructed and arranged that said parts
act to press said positioning means into said reg
ister with said re?ector unit; said pressing unit
ber; a washer member having apertures, smaller
than said heads, through which said projections
structed and arranged to connect said units, op
ing unit having bayonet slots, cooperable with
said heads, so constructed and arranged that said
unitary device is detachably mounted on said re
?ecting unit by bayonet connection and seated by
rotation relative to said re?ecting unit substan
65 tially about the axis of said unitary device.
6. In combination: an incandescent electric
_ lamp having a base; a re?ecting unit for said
lamp; positioning means for said lamp, including
a ?ange extending laterally from said base,
whereby said base and said re?ecting ,unit are
adapted to be brought into register at a piurality
of points disposed about the axis of saidbase;
said ?ange having circumferentially spaced bay
onet slots having entrance portions and smaller
40
for said lamp; said lamp comprising positioning
at their ends remotest from said carrying mem
are slidably disposed; and means, including a re
silient part integral with said washer member,
constructed and arranged to bias said washer
member toward said heads of said projections
and against said re?ecting unit; and said re?ect
60
atively assemblable by bringing said ?ange to
underlie all of said heads and then rotating said 15
lamp about its axis; and said heads being of such
diameter and axial length that when said ?ange
is out of parallelism with the plane defined by
50
and said re?ector unit comprising means con
erable to connect or disconnect said units upon
relative rotation of said units; and means for re 55
leasably holding said pressing unit in connected
position, against disconnecting relative rotation,
comprising a releasable holding member; one of
said units comprising means mounting said hold
ing member and against rotation relative to that
unit; the other of said units being provided with
an aperture, and said holding member compris
ing a projection constructed ‘and arranged to en
ter said‘ aperture to hold said units against rela
tive rotation; and said one unit mounting said 65
holding member for movement relative to both of
said units, in the general direction of the axis of
said pressing unit, between a holding position,
in which said projection is disposed in said aper
ture, holding said units against relative rotation,
and a releaseposition, in which said projection
is withdrawn from said aperture, permitting such
relative rotation.
'
9._ In combination; mounting means, for sup
-75 seat portions connected by tapering intermediate - porting an incandescent electric lamp, having a
75
4
‘ 2,110,132
plurality of bayonet slots each having a gener
ally circular entrance portion and a smaller seat
portion spaced circumferentially from'said en
trance portions; and a lamp holding unit, in
cluding a member carrying a plurality of cir
descent electric lamp, having a base; a re?ector
unit for said lamp; said lamp comprising posi
tioning means constructed and arrangedto reg
ister with said re?ector unit at a plurality of
places spaced about the axis of said base, to
cumferentially arranged connector portions each
position said lamp in said- re?ector unit; and
cooperating with said mounting means for re- >
12. In combination; an incandescent electric
lamp; mounting means for said lamp; said lamp
having a shank and an enlarged head generally securing means, constructed and arranged to
secure said lamp in position; said securing means
circular in cross-section; said heads being adapt
ed to pass through said entrance portions and and said re?ector unit comprising bayonet slot
means detachably connecting said securing means
10 become seated on said seat portions; said hold
_
said re?ector unit, and comprising also latch‘
ing unit being so constructed and arranged that and
means releasably holding said securing means
said connector portions are detachably connect
ible by bayonet connection with said bayonet and said re?ector means against detaching rela
tive rotation; and said securing means compris
slots, and that upon seating rotation of the bayo
ing spring means serving to resiliently hold said 15
15 net connection said shanks fit snugly but slid
ably in the circumferential ends of said seat lamp in position and to resiliently hold said latch
portions; and said holding unit including means means in latching position.
leasably preventing unseating rotation~oi said
.'
v
20 connector portions.
10. In combination: an incandescent electric
lamp, having means providing a base for said
lamp; mounting means, for said lamp, having a
plurality of bayonet slots each having an en
25 trance portion and a smaller seat portion spaced
-
' circumferentially
from said entrance portion; -
said base means including a lateral extension
having a plurality of bayonet slots each'having
an entrance portion and a smaller seat portion
30 spaced circumferentially from said entrance por
tion; a. holding unit, including a member carry
ing a plurality of circumierentially arranged con
nector portions each having a shank and an
enlarged head; said heads being adapted to pass
35 through said entrance portions and become seated
having a base provided with-a lateral extension 20
‘constructed and arranged to abut said mounting
means; a holding unit, for said Lamp, so con
structed and arranged that said holding unit is
detachably connectible to said mounting means;
said holding unit including ?rst and second mem 25
bers; said ?rst member abutting said mounting
means at the side thereof opposite from said
lateral extension, and said second member being
spaced from the ?rst member; said first mem
ber being in the form of a plate having circum 30.
ferentially spaced apertures; and connecting
means, including connector members extending
between said spaced members and slidable
through the apertures in said ?rst member; said
connecting means being so constructed and ar
on said seat portions of said bayonet slots in
ranged that said second member is movable to
bayonet connection said shanks ?t snugly but
constructed and arranged to bias said spaced
35
i said lateral extension; said holding unit being ward said ?rst member, and thatmovement of
said second member away from said ?rst mem
so ‘constructed and arranged that said connector 1
is positively limited; and means, including
portions are detachably connectible by bayonet ber
a resilient member integral with said plate at 40
connection with said bayonet vslots in‘ said mount-' one end and. having its other end normally
ing means, and that upon seating rotation of the ‘spaced from and engageable with said plate,
slidably in the circumferential ends of said seat .
portions of said bayonet slots in said mounting ; members away from each other, and to positively 45
limit .the stress which may be put on said resilient
45
means; andsaid holding unit including, means
cooperating with said mounting means for re-,
leasably preventing unseating rotation of said
connector portions.
'
11. A lamp assembly, comprising: an incan
member by movement of said second member
toward said ?rst member.
-
HARRY A. DOUGLAS. -.
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