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Патент USA US3080562

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March 5, 1963
H. JAcoBEl., JR., ETAL
Filed Jan. 25, 1961
2 -Sheets-Sheet 1
' HERBERT nhcaaa „fle
BY Two/m5 Wulf/vrais “
March 5, 1963
Filed Jan. 25. 1961
2 Sheets-Sheet 2
« A
19è-Reiff? :1460554 ,rúa
BY Tlfn/w45 „Jn/765.5
United States Patent O ice
Patented Mar. 5, i953
FIG. 6 is a transverse sectional view taken on the line
6-6 of FIG. 3;
FIG. 7 is a face view of an assembly of our improved
modular indicator units;
FIG. 8 is an inverted plan view of said assembly;
Herbert Jacobel, Jr., Anaheim, and Thomas W. Eentges,
Grange, Calif., assignors to Marco Industries Company,
Anaheim, Caiif., a corporation of Caiifornia
FIG. 9 is la sectional view taken on the line §-9 of
Filed Jan. 25, 1961i, Ser. No. 54,85%
FIG. 3, illustrating the operation of attaching the indi
9 Claims. (Cl. 346-37@
cator cap; and
FIG. 1G i-s a sectional view taken on the same plane as
modular type. The term “modula-r,” as used herein 10 FIG. 9 but illustrating the cap in its latched position.
refers to a small unit, particularly one with an indicator
General Description
face of small area, adapted particularly for use in a.
the drawings in detail, and in particu
multiple array of such units iitted closely to one another
lar to FIGS. 2 and 3, I have shown therein, as an example
in vertical columns or horizontal rows, or both. More
specifically, the indicator unit to which we have applied 15 of one form in which the invention may be embodied, an
indicator unit comprising, in general, a housing A of rec
this term is one having a rectangular indicator face which
tangular tubular form including a core il of substantially
is substantially coextensive in area with the cross sectional
rigid insulating material such as molded synthetic resin
area of the indicator light housing, whereby, when a
plastic, and a sheet metal jacket 12; a pair of mounting
plurality of such units are stacked one upon another in a
plurality of vertical tiers arranged side by side, the plu 20 brackets B, fabricated of sheet metal, for mounting the in
dicator units to one another and to a mounting panel C; a
rality of indicator faces will collectively present a substan
rear end cap D, of molded insulating material (which may
tially uninterrupted composite indicator panel on which
be lthe same as that of core 11) fitted into the rear end of
a large number of separate indicia, arranged in vertical
core lll; a pair of combined terminal and latch-keeper
columns and horizontal rows, can be individually dis
This invention relates to indicator light units of the
played by illuminating their respective indicator units.
units E, of metal, fitted between the telescoping portions
The invention contemplates the utilization of a minia
ture light bulb (e.g. a small neon or incandescent bulb)
in each of the indicator units for illuminating its respec
tive indicator face; and is directed particularly to the
of housing A and rear end cap D; an indicator cap and
perimentaliy, a “pusli-in-pull-out” indicator cap of rec
tangular cross section was telescoped into a close-fitting
housing of rectangular tubular form and held by a snug
friction tit. Due to the tendency of such a cap unit to
slide out of the tubular housing under the effect of vibra 40
of the sleeve and fitted snugly therein, In an assembly of
several vertical tiers of the indicator units as shown in
FIG. 7, the opaque edge Isurfaces of the forward lsleeve
portions of the housings will cooperatively define a rec
light bulb assembly F latched into the forward end of
housing A; and a pair of bridge plates G for joining
yadjacent indicator units to one another (FIG. 8).
Jacket i2 and core 11 cooperatively provide a housing
problem of servicing, such as replacement of burned-out 30
comprising the core 11 as a rear end portion and a thin
bulbs. To this end, a primary object of the invention is
wall rectangular sleeve portion projecting forwardly there
to provide a-n indicator light unit having a readily remov
from to receive the indicator cap F. The latter is received
able indicator face cap normally closing the forward end
within this sleeve portion of the housing as indicated in
of the indicator unit housing.
In an earlier modular indicator unit developed ex 35 FIG. 2, with its indicator face flush with the forward end
tion, the need for a more secure attachment became
apparent, and the present invention is aimed at satisfying
that need by providing a positive latching means for hold
tangular grid or lattice framing the individual indicator
faces as shown in FIG. 7.
The indicator faces of cap
units F are of light-transmitting character (preferably
Detailed Description
position with its indicator face lying in a common plane
In housing A, core ll comprises a rectangular tubular
with the indic-ator faces of surrounding units.
forward portion 15 deñning a recess t6 to receive the
A further object of the invention is to provide an indi
rearward portion of indicator cap unit F; a rear portion
cator unit of the type indicated above, wherein the latch
17 providing a rectangular socket to receive the shank of
ing and unlatching of the indicator cap is accomplished
rear end cap D; and a central web portion 1S which has in
by actuation `of the cap itself rather than a separate latch
its center a circular opening 19 establishing communica
actuator, in order that the composite indicator face pre 50 tion between the socket I7 and the recess id. In the re
sented by the assembled group of individual indicator caps
spective sides of web 18 are a pair of transverse bores 2t)
may present a substantially continuous illumina-ble indi
yto receive rivets or bolts 21 for securing the brackets B to
cator surface, free of any forwardly projecting latch
the core A, and for securing tiers of the units to one an
actuator buttons or handles. More specifically, the in
other, through bridge plates G. Jacket 12 consists of a
vention provides a-n arrangement of indicator housing and
pair of channels or sleeve sections 25, each having opposed
indicator cap having cooperable means for latching Vone
apertures 20’ to receive bolts 21 by means of which they
to the other, adapted to be latched and released by pres
are secured in assembly to core 11.
sure applied to the indicator faces of the cap at a desig
Formed in respective sides of web 13 are longitudi
ing the indicator cap telescoped in the housing in a fixed
nated point.
nally extending elongated rectangular slots 22 (FIG. 3)
Other objects and advantages will become apparent in 60 each of which is flared outwardly at its rear end to de
the ensuing specifications and appended drawings, in
fine an offset shoulder 23 at the base of the socket 17.
FIG. l is an exploded view of an indicator unit em
Each slot 22 extends transversely between a pair of
elongated lands 24 extending parallel to the major axis
bodying our invention;
FIG. 2. is a longitudinal axial sectional view of the
of core 11. There is a pair of lands 2d at each side
of the core 11 and between each pair there is deñned a
shallow fiat longitudinally extending recess to receive
FIG. 3 is a transverse axial sectional view of the same;
a portion of unit E.
FIG. 4 is a transverse sectional view of the same taken
Bracket B, of stamped sheet metal construction, com
on the line 4-4 of FIG. 3;
70 prises a sleeve section 25 of rectangular channel form
and a bracket part of angle form including a leg 26
FIG. 5 is a front face view of the unit taken as indi
cated `by the line 5-5 of FIG. 2;
secured ‘by welding (or simply by means of rivet 2l)
brace and position the units E in assembly. The keeper
bars -51 are laterally positioned between-therelongated
to one `side of a respective sleeve section 25, a leg 27
in face to Vface contact with the v‘central web >of’sleeve
section 25; and a tab 2S formed integrally with and bent
lands 24 of core A and disposed in the recesses defined
there between. The terminal-keeper units E are secured
atright angles from one endjof the leg 2’7 _andoffîet
rearwardly ‘from the adjacent end of Ysleeve section `25
in assembly by engagement of their L-webs 50 in the
L~recesses 35’- between the ñat walls of the latter and
the >opposed inner walls of socket 17, as illustrated -in
FIGS. 2 land 3. The depth of recesses 35’ islsuchpas
portion 25’ extending through an aperture :29 in _the
to provide a snuglit. 'Ihejkeeperubars,SLarepreformed
panel C. _T_othevrearface of each tab'28 is secured a.
locking vnut 3€? to receive _a mounting _screw _passed 10 so that their winged tips. _54 will bear against the inner
Walls of sleeve member 15. Secure longitudinal posi
through asuitable aperture in- panel C, for securing-the
so as toseat against the rear surface of mountingpanel
C as shown in FIG. ’2, with a forwardly projecting _sleeve
unitto ~the panel.
tioning of socket unitsE _is provided for by the snug
through the end capD along the major QXisIheIeOf-is
l_the parts Ythat are latched intojthe bayonet slots~53.
,'Bayonetjslots 53 have at their' inner extremities, keeper
notches positioned to receive latch lugs>66 of indicator
bearingV` of offsets 55 against shoulderswìâwhile'the-rear
Rear end .cap vD comprises a shank portion 35 pro
ends of L-webs 5t) are seated snugly against. 4the-shoul
jecting forwardly from a~ñangedV rectangular head 36
having a periphery matching thatof core A while the 15 kdered ‘forward 'face of vflanged head '36.
Yi?orrned?inY the longer arms of- L-webs'50 are punched
periphery of shank 35 i-s such ~as to fit snuglywithin
4nibs` 56 which project inwardly and engage Ain thedimples
socket 17. TheV cross. sectional contour _of shank 35_is
_37-` in _the respective sides of the =sha_nk-- 35 of vrear end
rectangular, modified to Z-form by _L-recesses 35’ _in
cap -'D. ' The nibs 156 _assist‘the shoulders y*5S-in retain
diagonally opposite corners thereon (FIG. 1). -In op
`posite sides of shank 35 are dimples v37. _Extending 20 ing‘the keeper` bars _5l longitudinally against ¿the pull of
a bore 38 having .a counterbore 39 at. its innerend.
rlvíounted inthe 4bore 38 is a tubular terminalbushing
40, which has at its rearend >a head 40’ .abutting the
capy F lso _as _to retain the cap F in a position in which
_its .indicatorV face >is'flush with'the outer end of housfng
cap head 39. Through bushing 46 is :extended «.atermi
nal plunger contactV 4l. A terminal tail.42_is.secure_d
sleevejZS’, >asrshown irr'lîIG; 2. »These keeper notches
are defined by overhanging keeper jaws 57 against »which
the lugs66 are engagedrunder _the spring loading trans
mitted )by barrel spring 44.
beneath a flanged head 40' onthe rear. end of «bushing
4t?. Plunger 41 has at its rear, outer end an outwardly
swaged head 4I’Yand, at its inward,.forward end, a head
»43 abutted against'one end of a barrel springd‘t.
The 30
other ‘end of spring 44 is seated -inthecounterbore 39,
against the innerwend of `bushing 40, .which is rireted
,Indicator cap unit F comprises a lamp s0cket'60 of
metalvconsistingin a central -sleeve portiong61’having a
_frusto-pyramidal head 62 at its outer end, a square in
tegral collar, 63 adjoining head 62„l and a square collar
outwardly againstthe‘bottom of »counterbore 39,'at-45.
64‘axially spaced from collar„63. A square latch plate
Plunger Á41 is slidable axiallyinthe bushingft() yandis
urged forwardly by the barrel spring Mythe head‘dl’ 35 ¿65, _having the diametrically opposed> latchlugs 66, is
attached to the flangeutirt by integraliñngers 67 project
retaining it in assembly when'the rear end capjunitD
ing axially therefrom and bent inwardly _intothe‘annu
is withdrawn from the housing. _The headl _43 functions
lar groove defined between collars‘63 and 64 asbest
-asga contact. which is yieldingly4 pressed against the rear
illustrated in_FIG. 2.y In FIG. l, the iingers’67 are
_end of the lamp bulb of indicator cap F, lwith the plunger
¿41 retracted to the extent that `theheadßtl’ istshown 40 „shown inanopen condition prior to assembly. "Ihevlatch
`_platem65~hjas a round> central openingthrough which _the
yprojecting-from «bushing head 40’ vin FIG. 3.
rearwardly projecting portion of socket sleeve 61 extends.
_Inone end of the- hanged head 36, communicating
>A_srnall lamp bulb >(eg.` neonv or incandescent5 bulb)
with the shorterarm of a respective L-recess‘È’S’,y lying
:68 is received in the socketvei), and hasa base Contact
in the plane of said» shorter arm, ,and projectingA entirely
through the „__ñange _;ofhead 36 parallel> to the axis `of 45 `in the yform Vof a _ñange 69 engaged against therear end
of, socket sleeve, 6l. Electrical _connection~ is> thus es-4
bore 39, is a shallow flat passage 46, shown in_rphantorn
,tablished from the base contact,through` lthe socket¿n60
„and latch plate k,65 and lugs ,66 thereof. tothe keepe?l
in FIG. l.
Terminal-_latch keeper «unitE comprises, _inone instance,
aZ-body of stamped ,sheet- metal .(e.g. spring'brass)
bars 51. From the terminalunitE which hasmthe _ter
comprising anotîset central web 5t) ofangle form, a 50 Vrninal tail» 52„ this . side of thecircuit is “carried >to an
external _ wiring connection.
ïlatch keeper bar _51 projectingY from one side ofa longer
,The bulb _68 has a centralcontact'vltl (FIG. 3),- which
_arm of web Sil, andaterminal tail 52 of ,straight bar
„seats against the head 43 ofl the, spring mounted terminal
form projecting Vfrom the _opposite side of the Vother
V(shorter) arm of web 5t).
_plunger 41. _External connection to this side vof the lamp
The arms of web'Stl (and
correspondingly, the _keeper 1bar 51 and` terminal tail 52.)
are disposed in planes at right angles to one .another and
are joined _by _antintegral _bendf AOpening Ainto ‘the’ for»
ward >end of keeper bar 51v is a bayonet slotv53. The
_forward _tip _portions of bar_Sl-onl respective, _sidesfo-f
bayonetslot53 aredihedrally bent, outwardly at a_ small
angle to provide wings` 54 which, inuthejassernbled 4indi
is _provided vfor by the terminal tail 42`ywhich is electrically
lconnected,,through „bushingl the plunger w41.
_Molded onto the sockethead 62xismalens`cap v71_ hav
ing aucentral aperture 72 to _receive the‘forward endof
_Vlightcbulb _68 and having aforw-ardly extending, pyram
60 idally, flaring skirt 73. ` A face plate or window» 74, hav
cator unit as shown in FIG. 3, provide a ñaringmouth
to receiverthe rear portions of indicator cap F.
-Only one of the units E has the terminal tail 52. 'Ijhe
other one, shown inthe background in FIG. 1, consists 65
'_ingva'suitable designatingV character 75 (which `_may be>
.of opaque material) imprinted thereon.- or inlaid therein„
and having at one end a dot 76 similarly applied,_` is
_secured to skirt 73. . The lens plate 74 is of. light-trans
mitting character, preferably translucent. Alternatively,
-in a keeper bar 51 and the angle web 50 _without a tail.
it could be transparent, or of opaque material -with the
In _the assembled unit,_ the angular webs 50 of the
vterminal~keeper units E are received in the L-recesses 35'
in lsl'_1ar1l~:_í’a5_of rear end cap 1),. the‘terrninal tailçSZ
'character `7S formed as an aperture therein. . A suitably
c project forwardly through the.apertures 22 inthe cen
tral web 18 of the core A. The keeper bars 51 are joined
terial, "and is _preferably of a ,plastic material similar
chemically Ato that of window 74’so that the latterfmay
heat resistant plastic material, suchî as ycellulose >acetate
butyrate (eg. Tenite I_-I-3Ühigh ?temperaturety'pe, which
lextends rearwardly through the passagedñ in the flanged 70 has the required optical clarity) is preferably'used. Lens
~cap 71,-likew1ise may be of translucentmolded .plastic ma
head 36 of rear end cap D, and the keeper b_ars 51
be ~secured tothe cap adhesively» by the wellkn‘o'wn
`integrally to-their respective webs '50 by shoulder "offsets
,155‘ which-__ seat _against the -shoulders 23 of web 118 Vto 75 technique of applying a `solvent_to-fthesurfaces to be
adhered. The marginal areas of the rear face of lens
plate ’74 are thus secured adhesively to the forward face
of lens cap skirt 73.
In operation, the assembled unit will function as a
simple indicator light, with current supplied to the light
bulb 63 through the terminals 42 and 52 and the internal
connections hereinbefore described.
To remove the indicator cap F, as for replacement of
a burned out bulb 68, pressure of a finger tip (indicated 10
at Sti in FIG. 2) is applied to >that end of the face plate
"/'4 which is designated by the dot 76. Under such pres
sure, the cap F Will be slightly depressed against the spring
44, releasing 'the frictional engagement between lugs 66
and the overhanging shoulders of jaws 57. The spring 15
pressure, applied along the axis of plunger 41, will react
against lthe finger tip pressure applied through cap F
along an axis extending between dot ’76 and the point of
contact of the rear end of lamp 68 against the head 44
of plunger 41, which latter axis, indicated in FIG. 2 20
by the broken line Si, subtends an obtuse angle to the
axis of plunger 41, and there will be a resultant force
applied to lugs 66 in the transverse direction (approxi
mately bisecting the obtuse angle between the axes of
the applied forces) such as to move the lugs 66 laterally 25
out of the keeper notches into the ope-n throats of bayonet
slots 53, and past the tips of jaws S7. The lugs 66 are
then freed so as to be released outwardly through the
appropriate size in the panel C. FIG. 2 illustrates the
mounting of only a single unit projecting into an aper
ture 4of single uni't size in a panel, which may be desirable
in some instances.
Although the indicator faces of cap units F may for
some uses be square, the face area (and, correspondingly,
the cross-section) of cap unit F for most applications,
will be of elongated rectangular form, with the minor
crossasectional axis being parallel Ito the common trans
verse axis of latch lugs 66, and with the major cross
sectional axis of the indicator face extending through dot
76, normal to such minor axis. The direction of swing
ing movement of lugs 66 in their l-atching and unlatch~
ing movements is generally parallel to such major cross
sectional axis.
We claim:
1. In an indicator light, in combination: a housing
4including a sleeve deñning an openable end thereof; an
indicator cap and lamp assembly including a cap of
non-circular cross-section normally receivable within said
sleeve in a position closing said openable end, said cap
having a front face, normally disposed at right angles to
the longitudinal axis of said housing, for displaying in
dicia, and having a lamp socket in the back thereof, on
an axis normal to said front face, for holding a lamp
bulb having an end contact; a spring loaded contact
mounted in said housing on said longitudinal axis for
engagement by said end contact; said cap having releasable
latching means comprising a pair of latch lugs projecting
open throats of bayonet slots 53 by releasing the finger
tip pressure at dot ‘76, and by inverting the unit cap F 30 laterally from respective sides of said cap on a common
transverse axis and a pair of spaced parallel keeper
can be dropped out of the open end of the sleeve 25’.
members mounted in said housing on opposite sides there
To replace the cap F, it is tilted to a position approxi
of so as to define between them a socket space to receive
mately as shown in FIG. 9, where lugs 66 are lined up
said lamp socket, said keeper members being provided
with the open throats of bayonet slots 53, and is inserted
into the open end »of sleeve 25’ until the lugs 66 are re 35 with respective bayonet slots having at their inner ex
tremities, keeper notches extending in a common direc
ceived in the bayonet yslots in approximately the positions
tion transversely of said common transverse axis to re
shown in FIG. 9. It may be noted that, in this position
ceive said lugs so as to retain said cap assembly in said
of the -cap unit F, the center contact Vof lamp 68 will en
normal closing position, said bayonet slots having open
gage against the plunger head 43 near the periphery
thereof. Pressure is then applied to the outwardly pro 40 throats extending parallel to said longitudinal axis facing
toward the said openable end of the housing and offset
jected end of cap unit F approximately as indicated by
laterally from the common transverse axis of said lugs
the arrow 82, slightly depressing the plunger 41 and
when said cap unit is in said normal closing position,
moving the lugs 66 into the bottoms of the bayonet slots
release of said lugs from said bayonet slots is
53. The transverse component of pressure 82 will cause
accomplished by pressure on said indicator face near a
the lugs 66 to engage against the ends of keeper jaws 45 marginal
extremity thereof which is on the opposite side
5'7 and slide downwardly against the end surf-aces thereof
transverse axis from said throats, said
until the lugs can enter the keeper notches at the bottoms
pressure reacting with the opposing pressure of said spring
yof the bayonet slots 53, whereupon the cap unit F will
loaded contact along respective pressure paths intersecting
tilt 'to a position in which its major axis is aligned with
at an obtuse angle less than 180° at the point of engage
the axis of plunger 41 and the lugs 66 are received in
of said contacts, to develop a transverse resultant
the keeper notches. The movements of the lugs during
of force in a direction toward said throats, effective to
this operation are indicated approximately by the arcuate
tilt said cap assembly on a transverse axis parallel to the
arrow S4 in FIG. 9.
said common transverse axis of the lugs, whereby to shift
Upon release of pressure against the cap F, the lugs
said lugs transversely into said throats to release the cap
66 will be spring loaded against the under shoulders of
for removal from the housing.
-jaws ‘57 to retain the cap securely latched in the sleeve 25’.
2. An indicator light as defined in claim 1, wherein
FIGS. 7 and 8 illustrate how a plurality of vertical tiers
said lamp socket comprises a metallic sleeve adapted to
of the indicator units can be attached to one another by
establish electrical connection from a lateral contact of
the bridge plate G, secured to the tops and bottoms of
a lamp mounted therein, through one of said lugs and
`the tiers in overlapping or bridging relation to adjacent 60 its
coacting keeper member to one side of an electrical
tiers, by means of the bolts or rivets 21 extended through
energizing circuit while connection is established through
the bores 2t) »of the respective indicator units, with the
said end contact and spring loaded contact to the other
units arranged in horizontal rows, side by side, as Well
side of such circuit.
as in the vertical tiers. The vertical tiers are secured to
3. An indicator light as defined in claim 2, wherein said
one another against horizontal separation by the bridg 65 cap is of plastic material molded onto the outer end of
ing action of the plates G. The horizontal rows are
said lamp socket sleeve and has a translucent face plate
secured to one another against vertical separation by
covering its front side and carrying said indicia.
the long bolts or rivets 21 which extend full length ver
4. In an indicator light, in combination: a housing in
tically from top to bottom of the `assembly as indicated 70 cluding a sleeve of rectangular cross section deñning an
in dotted lines in FIG. 7, in the leftward tier thereof.
openable end thereof; an indicator cap assembly of T
form including an elongated cap of rectangular periphery
The mounting bracket parts 2.6«28 are secured to the
four corners of the rectangular assembly of units, for
fitted within said sleeve, having a transverse axis of
mounting the assembly to the panel C, with the forward
tilting movement normal to the longitudinal axis of the
end of the assembly projecting into an aperture 29' of 75 housing and having an indicator face normally disposed
a.position:closingr said openable .end .of _saidf housing,
.ands aetubul-ar-.socket.projectingfrom the .back of .said
.sleeve with itsA majorf axisnormalto` said longitudinal
.axis in anormal .closed position of said cap, .and having
.capaoni an .axis normal. to,..said- end . face,” for holding
a lamp bulb having an end contact; a spring loaded contact
ing, and a tubular metal socketfhafving a forward end se
contact; and releasable vlatching means comprising a pair
ïthe interiory thereof,- and-a rear end portion projecting
~rearwardly therefrom-‘With its axis normal to said. end
an indicator facedisposed as the end. face of. said hous
«.'mountedr-insaid. housingfor .engagement by said >en'd 5 cured to the back of said cap and communicating with
_of latch lugsls-projecting laterally from> respective sides
face, -for-holding- a llamp bulb having an end contact;
said socket having a pair of lugs~projec`:ting'fromy opposite
«sides inespaced-parallel planes normal to said transverse 10 sidesthereofon a common axis-transverse of said major
¿of ¿said/„pap parallel ~` to y„said ~transverse laxis and a pair
-.ofkeepermembers.mountedin said housing on opposite
*,axis‘so las to.-deñne-between„them .a socket .space toreceive
cap axis; aspring-loaded contact mounted-in said-housing
„tremities,» keeper notchesextending in.a.cornmon ’direc
vfor engagement by said lend Contact; and a pair of sub
stantially- ilat keeper members mounted inty said housing
.ion opposite -sides lthereof in planesV parallelv to the vsaid
_slots havingthroats opening .toward thesaid _openableend
:bers;- vsaid keeper «membersï having» respectiveÄ keeper
„said._flar`r1p~$ocket,. said keeper. members. being `provided
„with«respective.bayonetslots »having atl their inner ex
tion transversely with reference to said axis of tilting ,M15 «major axis'of-fthe cap-in .the closed positiorilthereof, said
@keeper- rnembersdeñning Ybetween lthem a socket-'space
movement, to receive said lugs so as to retain said .cap
»to receivesaid .lamp-socket -with the common axis of
assembly in- said.pnormal...closing» position `with said end
said- lugs extending transversely between said keeper mem
,face-_normaL to .saidlongitudinal axis.. thereof, and .said
;of~the housing and oiîsetlate'rallyfrom thecornrnon trans ,20 -rneans »interengaging vWith said `lugs to latch- said cap
«verse axis `oiisaid lugswhen. said .cap unit -is in said normal
-~l.assembly in~»said---11.ormal ‘closed position~thereof,. said
»keeper "means being =arranged for -release of said
l-lu'gs Vupon swinging `movementl of v«said `cap »assembly
u»wherein said lugs -move transversely of> said housing
`svaidfindicator-face which is...on- the- oppositefside of -said
»common transverse axis .from..,said throats, said pressureH 25 Í- in-a directionV vgenerally Vparallel to-said major. cross
closing position,I whereby. releaseof said lugs. from< said
.bayonet'slots is 'accomplished by pressure on that end of
reacting-»with vthe Vopposing pressurev of` said spring loaded
sectionalf axis-thereof, whereby » said vrelease is accom
contact along-respective..pressurevpaths«intersecting at an
'-plished by applying» linger Itip pressure `to vsaid- in
obtuse; angleî less` than.> 180? . at .the .point .of „ engagement
Lof; said. contacts,y _. to` develop .a Vtransversely Í directed re
ȕdicator .face -nearvan end thereof which is on the oppo
sitesideof said common lugv axis fromï the side toward
sultant-_of force effective. toftilt .said cap unit about said .. 30 `which-said lugs move in their said releasing movement.
7. Inl an indicator light,'in combination: a housing-in
transversenaxis of tiltingfmovement whereby to shift said
cluding a core of insulating material of »rectangular cross
-‘lugs a„long..~said„keeper..notchesy into s'aid‘throats -to re
"section having- forwardv and rear end portions of tubular
:_1 lease Íthe cap `for. removalfrom the housing.
form and a transverse -central web between said end por
5. In .an-indicator.` light,.,in.combination: a housing
„including a.-.sleeve Áof-elongated cross section transversely .35 V-tions,-‘said~Webhaving a central aperture and a pair of
`r»of-:itsvloijigitudinal:axis,:.deiì, openable end there
>lateral ïslots'extending axially-therethrough on opposite
.. of; an indicator ¿capl assembly..A including . an. -elongated cap
Hsides of said aperture, and a pair-of 'sleeve sections of
-metalxchann'el»section jointlyconstituting a jacket' sur
" rounding said core andV projecting beyond Athe’forward
goff» molded» plastic Vmaterialflittedv within. said sleeve with
l¿its major.- .axis the said »longitudinal housing
~axisin anormal.closed‘position»of said cap, and having _ 40 zend portion thereof tovprovide a sleeve of elongated cross
‘section fdeiìningl an openable‘y front end of said housing;
a’translucent lens .plateprovidingan indicator face dis
tan indicator capl assembly of‘T-form inclulding-a c_ap
,.- posedas the end faceof said housing, and aftubular. metal
`of elongated'cross-section'ñtted withinI said sleeve with
»socket havinga forward endmolded into ,the back of said
y‘its major and minorÍ axes normal to the longitudinal axis
~ cap-.and arear .end portion-projecting rearwardly `there
„fromv with: its. .axis .normal ¢ to said. end -face, forV .holding V4,5 lfofï'the' housing and having an indicator face disposed as
the end'face offsaid housing, and atubular socket pro
y a lampbulb .ha-ving anfendcontact? said socket having a
-ljecting'from thel back of said cap on an axis normal
g pair »of lugs projecting from. opposite îsides .thereof trans
to-said end Iface -into the tubular forward end portion of
.,»verselyçof saidmajoncapaxis .on a. common. axis inter
'said‘«core, for holdingl a lamp having an end contact;
«l sectingand >normal .to-»said socket axis; a. spring-loaded
. contactirnounted- yin said-housing for.` engagementby. said 50a» rear end cap of insulating material having a shank
~received inïthe rear. end portion of said core; a spring
ç .end _contact;»and` a pair . ofy substantially."y iiat Akeeper „mem
V.loaded contactpplunger mounted in said rear end cap
I bers'mounted» in-saidihousing >on opposite sidesthereof
«for» sliding ymovement on. said longitudinal housing axis
in ,planes-parallel .-toathe f longitudinal .housing axis and
and projecting through said central aperture'of the web
Y said major._._ax~is. of .the cap. in. the closed .posi
.~ tion .ithereof,.-said keeper. members deñning..between them ...55 `into-'said forward end portion of the core;- for engagement
by said'lamp end contact; andreleasable latchingmeans
a socket space to receive said..-projecting rearend portion
comprising a pair of latch elements on respective sides
_tof-_the lamp-socketswith; said lugs. intersecting saidplanes;
of said lamp socket on a common transverse axis parallel
.v_ said `keeper»n‘iembers being provid«'e`cl..with` .respective- bay
-to »said minor axis of the indicator cap,fand a pair of
¿onet slots having, at their inner extremities, keeper notches
¿to receiverrsaidtlngs soaasfto retain». said cap assembly 60 keeperbarsmounted in said housing lbetween> respective
vwin anormal position closingnsaidopenable end. of the
--housing, - with: .said .endl face .-normaly vto : said` longitudinal
__.axis thereof,-~.and îsaid:V slots` having- open . throats . facing
toward the said openable end of the> housingv and offset
sides of said shank and said rearend portion ofthe core
'and projecting through said lateral slots in embracing
`„relation to said lamp socket with said sides of the lamp
. socket in adjacent face-to-face opposition to said keeper
_ laterally »from «the ycommon-transverse axisi of .said .. lugs
~ß5ifbars,;`said. keeper bars .being provided with respective
«when said _cap> unit-,«.-said.~normalaclosing position,
latch members arranged to receive said latch elementsas
¿to retain said-indicator cap in a normal position closing
y whereby. releaseof-_said Ilugs’from said bayonetslots is ac
complished-by pressure .on that endof said. indicator face
.,whichiseon thetopposite, side of >.said . common `.transverse
axis: from >said throats.
r.6. In».‘anvindicatorlightgtint combination: ahousing
1 said-,openable end of the housing, with said indicator face
„normal to ‘said longitudinaly axis thereof, release of said
_,7() latch elements from said latchy members being accom
4plished bypressure on an end of said'indicator face on
,1 includingl agsleeveof elongated. cross-sectionhaving a
.one..side.of. said minor indicator cap axis, said pressure
1 Vmajor axissnormattoithe,longitudinallaxisof the hous
,reactingwiththe Opposing pressure of. said spring-loaded
ing, s defining „an ._openable. end i thereof; . an . indicator cap
.contact v`to develop a ~transversely directedresultant .of
:assemblyiincludingan elongated capA received within. said >75§force 4elfective to. tilt said'indicator cap so as to ~shift
said latch elements generally parallel to said major axis
of the indicator cap, to effect said release.
8. In an indicator light, in combination: a housing in
cluding a core of insulating material of rectangular cross
section having forward and rear end portions of rectangu
lar tubular form and a transverse central web between said
end portions, said web having a central aperture and a
pair of lateral slots extending axially therethrough on
opposite sides of said aperture, and a pair of sleeve sec
engagement by said lamp end contact; a pair of keeper
bars mounted in said housing between respective sides of
said shank and said rear end portion of the core and pro
jecting through said lateral slots in embracing relation to
said lamp socket with said sides of the lamp socket in
adjacent face»to-face opposition to said keeper bars, said
lamp socket having means releasably engageable with
said keeper bars to retain said indicator cap assembly in a
normal position closing said openable end of the housing,
tions of rectangular metal channel section jointly consti 10 with said indicator face normal to said longitudinal axis
tuting a jacket surrounding said core and projecting be
9. An indicator light as defined in claim 8, wherein
yond the forward end portion thereof to provide a Sleeve
said rear end cap has a head comprising a radial flange on
of rectangular cross-section defining an openable front
its rear end, said ñange having a slot extending axially
end of said housing; an indicator cap assembly of T-form
including a cap of rectangular cross-section fitted within 15 therethrough at one side thereof; and further including a
terminal tail projecting through said flange slots and an
said sleeve with its major and minor axes normal to the
L-web joining said tail to one of said keeper bars and
longitudinal axis of the housing and having an indicator
retained between a corner of said shank and an opposed
face disposed as the end face of said housing, and a tubu
corner of the internal wall of said rear end portion of the
lar socket projecting from the back of said cap on an axis
normal to said end face into the tubular forward end por 20 core, said tail and its respective keeper bar being thus
disposed in planes defining a right dihedral angle.
tion of said core, for holding a lamp having an end con
tact; a rear end cap of insulating material having a rec
References Cited in the tile of this patent
tangular shank received in the rear end portion of said
core; a spring-loaded Contact plunger mounted in said
rear end cap for sliding movement on said longitudinal
Hallerberg et al ________ ..._ Apr. 27, 1954
housing axis and projecting through said central aperture
of the web into said forward end portion of the core, for
Scheliman et al _________ _- Mar. 4, 1958
Noyes ............... _.. Feb. 16, 1960
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