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Патент USA US3030506

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April 17, 1962
WING G. CHENG
I
3,030,497
ELECTRIC LANTERNS OR TORCHES
Filed June 22, 1960
4 Sheets-Sheet 1
INVENTOR
W. 6. Cheng
WWW”
ATTORNEYS‘ ~
' April 17, 1962
WING s. CHENG
3,030,497
ELECTRIC LANTERNS 0R TORCHES
Filed June 22, 1960
4 Sheets-Sheet 2
43
59 55B
55A
FIG.3
INVENTQR
W 6. Cheng
' @MJWM
ATTORNEYS
> April 17, 1962
wme G. CHENG
3,030,497
ELECTRIC LANTERNS 0R TORCHES
Filed June 22, 1960
4 Sheets-Sheet 3
lllllllllliii
23
~95
.3
2
"M 23
29
2'
?NVENTOR
W, 6, Cheng
WMWM
ATTORNEYS
April 17, 1962
WING e. CHENG
'
3,030,497
ELECTRIC LANTERNS OR TORCHES
Filed June 22, 1960
4 Sheets-Sheet 4
United States Patent ‘0
a
1C6.
assent?
Patented Apr. 17, 1962
1
2
3,036,497
Wing G. Cheng, 1 Forfar Road, Kowloon, Hong Kong
all four cells rearwardly in the battery casing, so main
taining good electrical contacts between cells in the same
row and between the contact strip 8 and the adjacent
ELEETREC LANTERNS 0R TORCI-IES
Filed June 22, 19 5t), Ser. No. 37,934
Claims priority, application Great Britain Dec. 8, 1959
3 Ciaims. (Ci. 240-1053)
cells.
5
a
>
'
At the front end 1B of the battery'casing 1 a forked
bracket 15 is riveted to the casing 1, the bracket being in
the form of a bent metal plate with side arms 15A and
15B of this bracket level and parallel with the side walls _
of the battery casing. The forward ends of the arms 15A
This invention relates to electric lanterns comprising a
battery casing and a plurality of electric lamp holders con
taining electric lamps which can be energised by a battery 10 and 15B are provided with aligned pivot pins 17 connected
?tted into the battery casing.
to opposite sides of an oval outer carrier cup 19. The
closed forward side 19A of this cup is formed with two
large apertures 21 each of which is provided with a for
An object of the invention is the provision of an electric
lantern which is of relatively compact construction and
neat appearance. A further object is the provision of
wardly extending screw-threaded ring 23 the rear
an electric lantern which will provide a more even ?eld 15 end of which is rolled over at 25 to engage the edge
of illumination than hitherto. A still further object is .
of the corresponding aperture 21. A parabolic lamp re
the provision of an electric lantern which embodies a fur
' ?ector 27 is inserted into each of the rings 23 and is re
ther lamp holder which can be arranged to project a
tained‘therein by a ring-like cap 2% screwed on to the
beam of light in the same direction as a main lamp holder
ring 23. The central opening in each cap 29 is closed
of the lantern and can be rearrangedto project a beam of 20 by a cover glass or lens 31 which is retained by the cap
light in the opposite direction to that main lamp holder.
in position between the cap and the rim of the re?ector.
' Further objects and advantages of the invention will
Each re?ector 27 is provided at its rearward end with a
be apparent from the subsequent description’of an em
screw-threaded socket 33 into which is screwed a lamp
bodiment of the invention.
holder 35 moulded from synthetic plastics material and
The invention will now be described, by way of ex 25 having a lamp bulb 37» ?tted therein. A second, inner
ample, with reference to the accompanying partly dia
oval carrier‘cup 39 has its wall 39’ inserted into the wall
grammatic drawings, in which:
of the carrier cup 19 and ?xed to that cup by rolling of
FIGURE 1 is a perspective drawing of an electric
lantern;
the rearward edge 19' of the cup 19 over the adjacent
edge of the carrier cup 39. The closed side of the carrier
30 cup 39 is formed with two apertures 41 in each of which
,
FIGURE 2 is a side elevation of the lantern;
FIGURE 3‘ is a plan view of the lantern;
FIGURE 4 is a plan 'view of the lantern with the
upper'part of the casing opened;
is ?tted a protective shell 43, these shells covering re
spectively the rearward sides of the two re?ectors 27.
Inside each shell is mounted a strip of insulating material
-
45 on which is mounted a metal contact strip 47 arranged
FIGURE 5 is a front elevation of the lantern;
FIGURE 6 is a side elevation of an auxiliary lamp 35 to make contact with a metal rivet 49 ?xed in the bottom
holder shown in FIGURES l to 5 and of an articulated
‘of the lamp holder 35.
support frame on which thelamp holder is mounted;
The lantern is provided with a metal carrying handle
51 of inverted U-shape extending centrally along the lid
part 4 of the battery casing 1 from the front end 18 to
FIGURE 7 is a side elevation of the parts shown in
FIGURE 6 but with the articulated parts of the support
differently orientated;
40. the rear end 1A. Also mounted on the lid part 4 is a
foldable frame 55 adapted to serve as a support for a
FIGURE 8 is a perspective drawing similar to FIGURE
1 but with the articulated parts of a support for the aux
third lamp bulb holder 57. This foldable frame is made
in two parts 55A andv 55B. The ?rst part 55A is U-shaped
and is secured to the battery casing 1 in front of the
iliary lamp holder di?erently orientated;
' FIGURE 9 shows diiferent orientations of adjacent sec
tions of articulated parts of the support shown in FIGURE 45 handle 51 by a hinge 59 connected to its base part 60 and >
the axis of which extends transversely of the casing-1.
The second part 55B is also U-shaped and is connected
to the ?rst part 55A by hinge means comprising two
lantern; and
'
FiGURE 11 is a sectional plan view of two main lamps
co-axial hinges 61 each of which connects one of the
shown in FIGURE 1.
50 legs of the part 55A to one of the legs of the part 55B.
The base part 63 of the second part 553 is connected
The body of the electrical lantern is in the form of
6, given as sub-?gures (a), (b), (c), (d) and (e);
p
_
FEGURE 10 is an ‘electrical circuit diagram of the
a battery casing 1 which is a metal box comprising a
relatively shallow lower part 2 designed to accommodate
four unit cells 3 arranged in two rows side by side, and
a ?anged upper lid part 4 connected to the lower part 2
along one pair of adjacent edges by a hinge 5. At the
opposite side of the battery casing a catch 6 provided
on the lower part 2 is arranged to enter a slot 7 in the
upper lid part 4- and so to retain the lid in the closed
position.
to a mounting plate 65 for the third lamp holder 57. The ‘
space between the legs of the U-shaped parts 55A and
55B is greater than the width of the handle 51, and the
distance between the base parts 69 and d3, when the parts
55A and 55B are extended into alignment, is greater than
the length of the handle, so that ‘the third lamp holder
57 can be swung from a position shown in FIGURE 6,
‘ in which the legs of the U-shaped parts 55A, 5513 will lie
As indicated in FIGURE 4, the unit cells 3 60 on opposite sides of the handle?l, to the position shown
in FIGURE 1.
are so arranged that they are electrically in series, a
springy metal contact strip 8 mounted on an insulating
strip 9 riveted to the inside of a rear wall 1A of the casing
it serving to join the electrical contacts of the two ad
jacent cells. At a front end Wall 18 of the casing 1 two
resilient contact strips 10 and 11 are mounted on an
, insulating strip 12 riveted to the wall 1B in line with >
one another and so as to contact the electrical contacts
The side members or legs of the ?rst part 55A are of
channel shaped transverse cross-section (see FIGURE 8),
while the side. members or legs of vthe second part 55B
are of substantially ?at transverse cross-section apart from
a longitudinally extending central stiffening ridge. The
width of each of the legs of the second part 55B is some
what less than the distance between the webs of each leg
of the ?rst part 55A, so that the second part may be
of the two adjacent cells. Contact 16} is the positive con
70 swung on the hinges 61 to bring the legs of part 558 be
tact strip and contact 11 is the negative contact strip:'
The resilience of these contact strips is su?icient to force
‘ tween the webs of the legs of part 55A, as shown in
FIGURES l to 4. To each of the legs of the said part
3930,49?
s'
'
4
.
ing to move ‘frame part 551% in a clockwise direction to
.bring it into the position shown in FIGURE 9(a). In
FIGURE 9(e) the line of action of the force between the
55B is ‘secured a ?at metal spring strip 71 by a bent
metal clip 72 which has its ends clamped round the sides
- of the leg, The spring strip 71 extends beyond the hinge
spring 71 and the part 73' passes through the axis of
hinge 61; and the increased frictional force between the
parts of hinge 61 due to this force tend to keep the parts
'61 associated with the leg to which it is attached and oper
atively engages an adjacent part 73 of the ?rst part 55A
of the frame or support 55'. As the relative positions of
p .the ?rst part 557A and the second part 553 are changed
' in this position.
The switch mechanism
the two lamp bulbs 37 is
, the hinge'61 by the interaction of the spring strip 71 and
the part 73 will provide a tendency for the parts to lock 10 handle 51, and includes
FIGURE 10) connected
when the ?rst and second parts lie side by side (see
'by‘operation of the hinges 61, the moments set up about
81 for controlling the circuit of
mounted on top of the carrying
'a ?xedswitch contact 83 (see _
directly by a ?exible conductor
_, FIGURE 9(a)), when the ?rst and second parts extend
35 to the positive battery contact strip 19 and a movable
away from the hinge 61 at right angles to one another
’ switch contact 87 connected to the metal handle 51. The
(see FIGURE 9(0) ), and when the ?rst and second parts
extend away from the hinge 61 in opposite directions
two metal contact strips 47 associated with the bottom con
tacts of the lamp bulbs 37 are connected together by a
?exible insulated conductor 39 and by a ?exible insulated
conductor 91 to the negative battery contact strip 11.
The other contacts or shells of these two lamp bulbs 37
are connected tothe metal re?ectors 27 and thus through
(see FIGURE 9(e)).
’ '
The provision of the articulated frame SSpermits the '
signal lamp 57 to be set into ?ve different positions,
namely:
‘
Position 1 as show in FIGURES 1 to 5 and 9(a), in. 20. the contacting metal parts of the lantern to the movable
' which the frame part 55A ‘lies ‘?at against the top of the '
battery casing 1 withthe legs of the frame part 5513 super-'
posed, on the legs of the frame part 55A. In this posi
tion the third lamp holder 57 projectssbeyond the front
end of the battery casing to one side'of a line joining the
two lamp holders 35 and is symmetrically disposed with
'
, respect to those lamp holders.
7 Position 2 as shown in FIGURES _7 and 9(0), in which
the frame part 55A lies ?at against the top of the battery
casing 1 and the frame part 5513 extends upwardly from
the hinges 61 at right angles to the part 55A. The. lamp
holder 57 is then raised above the battery casing 1 and is
directed upwardly.
'
'
Position 3 as shown in FIGURE 8, in which the frame
,
vswitch contact 87.
.
a
,
The’third lamp holder 57 is provided with a switch 95,
the fixed switch contact 97 of which is connected bya
?exible insulated conductor 99 to the negative battery
contact strip 11. The movable contact 101 of switch 95
is connected to the bottom contact of the bulb 103 in the
lamp holder‘ 57. TIhe other contact or shell of the bulb
193 is connected by an insulated ?exible conductor 165
to the positive battery contact strip 10. .The construc~
tion of this lamp holder 57 and the switch 95 is similar
to that of the corresponding parts disclosed in my co
pending patent application, Serial No. 784,239, ?led on
December 31, 1958, now Patent No. 3,003,057, issued
October 3, 1961.
3
i
7
part 55A extends perpendicularly upwards from the bat‘ 35 When the switch controlling the two main lamp bulbs
tery casing 1 and the frame part 558 is' in alignment with
37' is in the “on” position the ‘circuit is as follows: posi
the part 55A and extends in the opposite direction away
tive battery contact strip) 10, ?exible conductor 85, ?xed
from the hinges 61. In this position the thirdlamp holder
switch contact'83, movable switch contact 87, handle 51,
57 is fully raised from the battery casing and is directed
battery casing 1, shellsof bulbs 37, ?laments, bottom
40 contacts of bulbs 37, conductor89, conductor 91, negative
upwardly.
'Position 4 as shown in FIGURES 6 and 9(2), in which‘
the frame parts 55A andVSSB both lie ?at against the top
of the battery casing 1 and the frame part 553 extends
away from the hinges 61 in a direction. Opposite from that '
of. the part 55A. In this position the lamp holder 57
projects from the rear of the battery casing 1 and is
directed rearwardly from that casing.
Position 5 (not shown)’ in which the frame part 55A
extends perpendicularly upwards from the battery casing 1
>
battery contact strip 11.
-
When the switch controlling the third lamp bulb 103
is in the “on” position the circuit is as follows: positive
battery contact strip 10, ?exible conductor 195, shell con
tact of lamp bulb 193, ?lment, bottom contact of lamp
103, movable contact-161 of switch 95, ?xed contact 97,
?exible conductor Q9, negative battery contact strip 11.
The electric lantern described above is of very compact
construction.
It has a very neat and attractive appear
and the frame part 55B is at right angles to the part 55A.
- ance, particularly when the third lamp holder 57 is posi
The lamp holder 57 is then raised above the battery cas
. tioned at the front of the lantern as shown in FIGURE 1,
ing 1, and is directed forwardly of- the battery casing to . where it is ‘located centrally between but above the'two
project a beam of light parallel to the composite beam of
main lamp bulbs 37. When the two main lamp bulbs
light from the two main lamps.
'
are switched on ‘the two light beams respectively from
As will be clear from FIGURES ‘9(o)itor'9(e),xwhen ,
turning the part 5513 of the frame 55 relatively to the part
55A about the hinges 61, the ?at spring strips .71 coast
with the parts 73 to'cause a locking or snap action when
the two frame parts 55A and 55B lie side by side, at right
angles to one another, and at opposite sides of the hinges
61,'i.e. at 180 degrees to one another. ' In FIGURE 9(a)
the force between spring 71 and part 75 sets up a moment
tending to move frame part 555 in an anticlockwise‘ di
rection into contact with the part 55A; ‘In FIGURE 9( b)
the force between spring 71 and the vpart 73 sets up a
moment tending to move‘ frame part 553 in a clockwise
these two bulbs are superimposed to provide a substan- _
tially uniform ?eld of illumination without the usual an-p
nular dark area. Further, since it'is most unlikely that
. both of the main lamp bulbs 37 will burn out at the same
time, the lantern is much more reliable than lanterns or
torches provided with only a single main lamp bulb. This
feature is of particular advantage when the lantern is used
by hunters and travellers.
'
What I claim is:
‘
'
a
p
>
-1. In an electric lantern a battery casing having a front
end and a rear end, a carrying handle of inverted U-shape
attached to the top of said casing, two separate re?ectors
mounted‘ at the front end of said casing in side by side .
. relationship, two lampholders mounted respectively one
direction to bring it into the position shown in FIGURE
9(0). In FIGURE 9(a) the line of action of the force
between‘ the spring 71 and the part 73 passes through the
axis of hinge 51; the increased frictional force between 70. in each of said-re?ectors, a lamp bulb mounted in each
of said lampholders, said re?ectors being arranged to di
the parts of hinge (il'due to this force tendsvto keep the
rect the two beams of light‘from-said-larnp bulbs which i
parts in this position; and should the-part 55B become
,are substantially parallel and merge to form a single com;
slightly displaced, a moment is set up tending to restore it
posite beam, a switch mounted-on said carrying handle
to the position in this ?gure. In FIGURE 9(d) the force
between spring 71 and the part 73 sets up a moment tend 75 and adapted to energize the two lamp bulbs in unison. a
5
3,030,497
third lamp ‘bulb holder, a support for said third lamp bulb
holder, said support being separate from and arranged to
straddle said carrying handle and rest directly on the
battery casing, said support including a ?rst part and a
second part, a ?rst hinge connecting said ?rst part to the
battery casing adjacent to the front end thereof, a second
hinge connecting said ?rst part to said second part, the
axes of said hinges extending transversely to the said bat
6
the base of the U, the second part of the support is of
U-shape, and the hinge means connecting the ?rst part to
the second part consist of two separate co-axially ar
ranged hinges each connecting one leg of the ?rst part to
one leg of the second part.
3. An electric lantern according to claim 1, in which
the said retaining means for the said third lamp bulb
holder comprises a ?at spring blade attached to one of
tery casing, the sum of the distance between the said ?rst
the two parts of the support in the vicinity of the hinge
and second hinges and the distance between the second 10 means connecting the two parts, and the spring blade is
hinge and the third lamp bulb holder being greater than
arranged to engage the other of these two parts adjacent
the distance between the rear end of the casing and the
the hinge means in such a manner as to tend to lock the
?rst hinge, whereby the third lamp bulb holder can be
two parts against relative rotation at the hinge means in
positioned at the front end of the battery casing, directed
each of the three positions referred to.
forwardly therefrom, or at the rear end of the battery 15
casing, directed rearwardly therefrom, or spaced from the
References Cited in the ?le of this patent
front end of the battery casing in a direction transverse
UNITED STATES PATENTS
thereto and means for retaining the said third lamp bulb
holder in any one of the three positions referred to.
339,052
Flocke ______________ __ ‘Mar. 30, 1886
2. An electric lantern according to claim 1, in which 20 2,566,280
Yandt ______________ .._ Aug. 28, 1951
the ?rst part of the support is of U-shape with the hinge
connecting this part to the battery casing extending along
2,581,129
2,861,174
Muldoon _____________ __ Jan. 1, 1952
Tolbot et a1 ___________ __ Nov. 18, 1958
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