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Патент USA US2412313

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Í/ ""‘ï
Dec. 10, 1946.1
Filed May ‘7, 1945
Patented Dec. 1o, 1946
Robert B. Battersby, Noroton Heights, and James
C. Prior, Stamford, Conn., assignors to Sidney
Schwartz, New York, N. Y.
Application May 7, 1945, Serial No. 592,370
5 Claims. (Cl. 24o-10.65)
This invention relates to portable lighting de
vices and more particularly is directed to pocket
battery flashlights.
Among the objectsof the invention is the pro
vision of an improved device of the character
described comprising few and simple parts which
shall be easily assembled to form a reliable and
dependable lighting means capable of withstand
ing rough and hard usage yet which shall be
small and compact so that it can be readily car
ried in the pocket or in handbags, which shall
be neat in appearance, convenient to handle and
- carbon and zinc terminals I'2a and I'3b of cells
I2 and I3, respectively, to provide a removable
seated anchorage for head portion I5. 'I‘he lat
ter carries a standard miniature incandescent
lamp I'6 and a switch Il for making and break
ing the circuit from said battery cells I2, I3 to
the lamp I6 on opening and closing respectively,
of a pivoted cover 20 in the manner hereinafter
Said flashlight head portion I5 is preferably
made of a suitable plastic molded material
formed with an integral cut-back edge or
operate, cheap to manufacture, and practical
rabbeted rim flange I-5a extended yaround the
and efficient to a high degree in use.
exterior of an open side thereof and neatly fitted
Other objects of this invention will in part 15 to
extend into the upper casing end IIa to ñrmly
be obvious and in part hereinafter pointed out.
seat the head portion I5 in position on the casing
The invention accordingly consists in the fea
II. Said ilange I5a and upper casing end IIa
tures of construction, combinations of elements
be provided with a readily detachable con
and arrangements of parts which will be exem
nection means, as for example, recessed blind
plified in the construction hereinafter described
slots or grooves I‘5b molded in exterior surfaces
and of which the scope of application will be in
of rim ilange I5a forming a coupling engaging
dicated in the following claims.
with inwardly projecting Ibosses IIb provided on
In the accompanying drawing, in which is
interior side walls of upper casing end IIa for
shown one of the various possible illustrative em
removably retaining the head portion I5 in said
bodiments of this invention:
25 seated position as shown in Figs. 1 and 6. The
Fig. 1 is a cross-sectional view taken through
material and construction of the upper casing
a pocket flashlight constructed to embody the
end IIa and said slotted ñanges I 5a is such
invention showing the cover in closed position
that the head portion I5 can be readily snapped
with the switch portions in open circuit and in
in and out of cooperating assembly for replacing
the dotted line the cover is shown in retained v the battery cells I2, I3 or the lamp I6.
open position with the switch portions in closed
As shown in Figs. 1, 2 and 2a, said flashlight
circuit for lighting the incandescent lamp.
head portion I5 is structurally formed to have '
Fig. 2 is a top plan view of the improved flash
a cavity I 5c extending in from the open side
light shown in Fig. l.
thereof and is elongated to conform to the oval
Fig. 2a is a top plan view like Fig. 2 with the
like shape of a cross section of the casing I I.
cover partly broken away to expose the under
end of said cavity I 5c may have integral
molded on the interior wall therein spaced ledges
Figs. 3 and 4 are cross-sectional views as seen
I~5d, projecting toward one another into the depth
along lines 3_3 and 4-4, respectively, in Fig.
of the cavity I5c to form a slideway and being
1, and
40 of a suñicient length to provide a rigid anchorage
Figs. 5 and 6 are fragmentary cross-sectional
for a vertically extending mid-portion I 9a of a
views showing detailed constructions taken on
suitable spring conductor switch member I9.
lines 5-»5 and 6---6, respectively, on Fig. 1.
The other end of said cavity I5c is provided
Referring to the drawing, I0 denotes a pocket
the interior wall opposite said ledges I 5d,
flashlight of a type that can conveniently be ' with a suitable lamp holder means, as for ex
carried in a vest pocket or in a woman’s hand
ample, a plurality of spaced lugs I 5e adapted
bag, constructed to embody the invention. Said
to form a seat for the screw base lend I 6a of lamp
flashlight I0 may comprise a suitable outer body
I6 when the latter is in assembled position with
casing |I,_as here shown, being formed of a
the bulb I6b thereof projecting through opening
one-piece sheet metal, enclosing a standard elec 50 I'5g’in partition wall portion I5f of head por
tric battery of reversed polarity positioned dry
tion I5 overlying the lamp bulb I6b as shown in
cells I2 and I3, that is being arranged for series
Fig. 1. The lugs I5e and partition wall portion
connection, each cell preferably insulated by a
I'5f are integrally molded with the interior walls
wrapper I4 of paper or liber material. Upper
of said last mentioned cavity end as seen from
end Ila of said casing >II extends beyond the 55 Figs. 2.„ 2g. and i.
2,412,313 Í
the lugs- I5e,'while spring member I8, which has
The nashlight head portion Il is also pro-~
its anchoring mid-.portion I9 made slightly wider
vided with the elongated snap closure cover 20
lthan intermediateportion .Ish or lower end por- -
which extends over partition wall opening'. IIa.
tion I9c can be firmly mounted in place by sliding
and wedging said mid-portion Isa, in the slide-- `
way between ledges läd. The rim flange IIa of
,head portion I5 can then be seated on the casing
jects freely into the cavity I5c for contacting
lupper end IIa and snap locked by the detach
with and flexing a horizontally extending inter
lable coupling connectionof bosses IIb in grooves
mediate portion I 9b of spring member I9, The
I5b. The lower end I9c of spring number Il
other or free cover end may be provided with ' will then be in tight contact with the carbon
finger grip or lip which facilitates opening the
cellI terminal I2a and zinc cell terminal IIb
cover 20 for swinging the latter from close to , . tightly pressed against the lamp center-contact
open position, as shown in full and dotted lines,
Ißc, forming a continuous series circuitl as de
Said cover 2li is pivotally mounted as by means -
of trunnion bearing 2l so that an end 20a termi
nating the cover I20 beyond said bearing 2lv pro
- respectively, in Fig. 1.
4scribed above. When the cover 20 is in closed
position, the switch I1 is in open circuit at the
ferrule of the lamp base I6a las shown in` full
The spring conductor switch member I9 is
preferably formed from a beryllium copper strip4
or the equivalent and besides having the verti
cally mid-portion and horizontally extending in
termediate portion I8a and Iilb, respectively, is
lines in Fig. 1.
To operate the fiashlight III fo'r lighting the
bulb, the cover 20 is manually swung open on the
also formed with a lower free contact end I9c 20 trunnion bearing 2l. As the cover. 20 swings to
which is positioned when the member I9 is
its open position, shown 1n dotted lines Fig. l,
firmly anchored' in assembled position to be
cover endv 20a flexes the spring member inter-
spring pressed against the center or carbon con
mediate portion I_9b downwardly and the end
blade iSd is brought into rubbing contact with
the ferrule contact of lamp base IGa completing
tact I2a of battery cell I2 as shown in Figs. 1 and 4. The other free end of member I9 forms a
blade Ißd which may be bent to extend down
the electric power circuit and lightingvthe lamp `
wardly alongside the ferrule contact of lamp
base I6a. Thus as seen from Figs. 1, 2a, 4 and 5
I6 forgiving illumination through the uncovered
opening` Iig. The spring member lßwis so ar
spring switch member I9 is constructed with - ranged and constructed so as to permit a‘mini
double contacts,'one at each end, the anchored 30 mum flexing leverage movement ,by the project
mid-portion lila being formed with edge exten
sions securely retained in slideway I5d provided
ing cover end 20a for greatest or maximum move
ment at the end blade I9d toincrease the sweep
thereof >in making and breaking the circuit con
in the walls of the cavity l5c for allowing the
lower contact end I9c to positively connect the
nections. - The -cover 20 is automatically swung-
member I9 in the battery circuit and for allow
ing spring contacting blade I9d to have a rubbing
circuit making connection with the fer-‘rule lamp
to either full open or full closed positions when
the end 20a is vmoved off the de_ad center line
with respect to the axis of the trunnion bearing
base Ilia when the cover 20 is manually swung
2i as 'seen from Fig. 1.
open while permitting a positive circuit break
If desired a suitable ring or bail 23, may be
ing connection thereat when- the cover 201 is 40 pivotally mounted to extend from the casing bot
snapped shut after the cover end 20a passed be
tom llc for suspending the ñashlight 2U from‘a
yond the dead point on »its swinging closure
movement, as is clear from Fig. l.
The casing II may be made of aluminum or
chain or the like.
It should be noted that the flashlight con
. lstruction Ill is not Aonly of improved simple con
other suitable metal and besides'being formed
struction but also lends itself to form a neat
with bosses I Id on the upper end ila, thereof has
and attractive designed article for the purposes
an integrally formed closure bottom I Ic provided
with a battery contact boss IId projecting up
It will thus be seen that there is provided a
wardly therewithin whichy is positioned to align
construction in which the several ob
centrally with zinc terminaly I2b of battery cell
invention are achieved and which is
I2. Spaced anchorages I lf also project upwardly
well adapted to meet the conditions of practical
within said bottom Ilc under the center or car
bon terminal I3a of cell I3 for permanently an
As various possible embodiments might` be
choring a helical spring 22, the latter making
made of the above invention„ and _as various
contact with said terminal I3a, as shown in Figs.
changes might be made in the embodiment above
l and 3. The casing II and head portion I5 ’are
set forth, it is to be understood that all matter
so proportioned that the battery cells I2 and I3 '
are under sufiicient compression between the
spring end I9c and boss Il d, and between said
helical spring 22 and the lamp center contact, 60
IIîc respectively, the latter bearing on the zinc
terminal I3b of vdry cell I3 so as to positively
assure a continuous series circuit from the switch
member I 9 through the battery cell I2 casing bot
tom I I, battery cell I3` and hence to the lamp: i8,
as is clear from Fig. 1.
The practical operation of the invention willv
now be apparent. With the head portion lI5 ref
moved from the casing II, the battery ceì1s'I2
and I3 are inserted in the- latter in relatively
reversed polar positions for series connection
' through casing bottom -I I. A lamp I6l is inserted '
under the partition wall I5! of the head portion
I5 with the lamp bulb I6b extending into the
herein set forth or shown in the accompanying
drawing is to be interpreted as illustrative and
not in a limiting sense.
Having thus described our invention, we claim
as new and desire to secure by Letters Patent:
1. In a portable flashlight construction of the
:character described, a head portion comprising
a one-piece molded insulating structure having
an elongated cavity extending in from an open
side thereof, an interior wall at one end of said
cavity having spaced ledges extending therefrom
to provide a slideway, a metallic conductor strip
having a mid-portion firmly secured in said slide
way and a. flexibly movable end contact blade,
the interior wall at the other end of said cavity
having integrally formed spaced lugs and a par
tition with an opening, an incandescent lamp
opening I5g and the lamp base I6a retained by 75 having a base formed with a -ferrule and center
f' ‘ anatre
nié oa wmc? said head portion is detachabiy
' tending
" ' 'Pl-»ná
im ,fthe-.tmb
and saidflißSÍe
seated,y battery cells fitted into -said casing con
retainedl by, said lugs lwith» the ferrule positionedr> " nected> in series circuits‘through said metallic
casingya. circuit closing mechanism carried by“
in the'path of ¿movement of-said blade, and piv- '
,saidy head portion including a conductor strip
oted means on said structure for -ilexing theïb'lade
_ to make a scraping contact with said- lamp base
having a mid-portion thereof anchoredr to the
head portion, a lower enç‘l extending from said
2. The portable ñashlight construction as de
ilned in claim 1 including a casing having cou
mid-portion contacting with one terminal of said
battery cells, an incandescent lamp having base
ferrule and center contacts carried by said head
portion spaced from said anchored mid-portion
with said lamp center contact connecting with
the other terminal of said battery cells, said mid
pling means for detachably securing said head ‘
portion thereon, said casing' comprising a one
piece metallic battery housing having an integral
closed bottom and'open top on which'said head
portion is seated, dry cells iitted into said housing
in relatively vreversed polar relation, a boss inte
grally formed to upstand from the interior side of
portion also having an intermediate spring por
tion extended in a direction toward but normally
short of said lamp base íerrule contact, said in
the housing bottom aligning to connect, with a , ’f termediate portion having a spring end blade for
making and breaking the circuit at said lamp
terminal of one of said cells, integrally formed
anchorage means to upstand from 'the .interior
ferrule contact, a cover pivoted on said head por
of the' housing bottom spaced from said boss,
tion to provide a removable closure over said
lampV and having a projecting end, said cover in
and a spring secured by said anchorage means
closed position having said projecting end thereof
aligning to' connect with a terminal of another of
engaging the, strip intermediate-portion for ilex
said cells, the other terminal of last mentioned
cell connecting with the lamp base center con
tact, said conductor strip having a spring contact
>ing same to actuate said blade to circuit open
‘» position. said cover on movement to expose the
on the end thereof opposite said blade contacting
lamp actuating saidblade to closed circuit posl- _
weiliâh the other terminal of the ilrst mentioned
5. In a portable ñashlight construction an in
‘3. In a portable flashlight oi' the character
described, a head portion adapted to be detach
l sulating head portion having a pivoted cover
adapted to be removably mounted on a battery
ably mounted on a casing housing electric bat
casing, said head portion having` integrally
tery cells comprising a'molded insulating struc
formed ledges arranged and constructed to serve
ture having an elongated cavity extending in
as a slideway,4 a spring conductor strip having a.
from an open side thereof, a one-piece metallic
mid-portion formed with edge extensions serving
switch blade. mounted in said cavity, an' interior 35 as a wedging means for anchoring said mid
wall at one end of said cavity having integrally
portion in said slideway, av lower spring end ex
formed spaced ledges to provide a slideway con
tending from said mid-portion adapted to contact
structed and arranged to anchor said metallic
a battery cell terminal in said casing, an inter
switch blade therein, an incandescent lamp hav
mediate portion extending from said mid-por- ,
tion opposite said lower spring and adapted to be
ing a bulb and base ferrule, mounted in said cav
ity and spaced from said slideway, the interior
flexed with said mid-portion as a fulcrum, and
. wall at the other end of said cavityl having in
tegrally formed spaced lugs and a partition with
an opening of less diameter than said lamp base
constructed and arranged to mount said incan
descent lamp with the bulb thereof extending into
said opening and with said lamp base and fer
rule retained by said lugs whereby lthe lamp base
. is positioned for being contacted on iiexing said
d. "in a portable flashlight construction, a mold
ed insulated` head portion, a metallic battery cas
an end blade terminating said intermediate por
`tion adapted to serve as a switch part for said
flashlight, said mid-portion forming resilient
means positioned in the path of movement of an
end of said cover to bear thereagainst for re
leasably retaining said cover in an open and
closed position while being flexed to operate as
said switch part.
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