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Патент USA US3096950

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July 9, 1963
Filed Dec. 19, 1961
United States Patent 0 "ice
Elmer G. Burleigh, 5475 Encina Drive, San Diego, Calif.
Filed Dec. 19, 1961, Ser. No. 160,520
3 Claims. (Cl. 239-272)
Patented July 9, 1963
heel 20 is a soft puncture spot.
It may be a hole sealed
after ?lling with the invisible odorized ink 34.
The odor of the ink 34 shall be distinctive neither
pleasant nor offensive. All the ingredients of the ink
34 shall be non-toxic, non-irritating, non-staining and in—
visible under ordinary light. The odor should last be
tween one half to three-quarters of ‘an hour and the ink
This invention generally relates to a device used to
spray an odorized invisible ink in the vicinity of a trigger~
should remain recognizable after a casual iwashing.
The projecting nozzle 5 is drilled concentrically for
ting knob for the purpose of later locating and identifying 10 the outer ori?ce 7 and has a hole drilled laterally to com
the person using this unauthorized equipment; and more
plete the gas passage 8. The projecting nozzle, which is
particularly to a device installed within a ?re alarm box
the only part of the device visible on the outside of the
for the purpose of secretly marking any person transmit
box is machined to provide a de?ecting surface 6.
The CO2 puncturing needle body 10 is drilled con
ting an alarm.
An object of the invention is to mark said person with 15 centrically to receive the hollow puncturing needle 13
a distinctive odor not objectionable yet not pleasant which
and to complete the gas passage to gas passage 17. A
threaded shoulder on the needle end of the puncturing
will help locate said person in case the alarm was false.
needle body 10 receives the retaining cap 12 that holds
Another object of the invention is to secretly mark him
the rubber CO2 cartridge seal 11. The size of the CO2
with invisible ink for the purpose of positive identi?cation.
Still another object of" the invention is to avoid objec
cartridge can be determined by the amount of the ink
necessary to spray.
tion of people transmitting a legitimate alarm, since the
The hammer arm cradle 15 supports the cartridge 14
odor is not offensive and the ink is invisible under ordi
in the ready position until the box is pulled. The hammer
nary light.
arm 16 is powered by the spring 24. The spring 24 is
Another object of the invention is to provide a source
of perishable volatile liquid in a sealed capsule for an 25 anchored at the driving spring anchor 25. The hammer
arm is cooked by the trigger 27 snapped over the hammer
inde?nite length of time until used. It requires no serv
trigger end 26 by the device tripping spring 32.
icing until after the box or the equipment is used.
Still another object of the device is its compactness,
The tripping lever 30 of the alarm box (which is
operated from outside the alarm box by the manual knob
enabling its installation inside the existing ?re alarm box
and actually sets the alarm box in operation) is pivoted
door without complications or interference with any of
at 31.
the normal box operations.
Still another object of the invention is to provide a
In the operation of the device, pressure is stored in the
CO2 cartridge 14. Odorized invisible ink 34 in a pre
device which is simple to construct, easy to service, in
determined amount is stored in a sealed capsule 18 inside
expensive to manufacture and install in existing boxes, or
the cylinder 1. The capsule 18 is ?tted closely enough
incorporate in new ?re alarm box doors; is compact
to the walls of the cylinder 1 to act as a piston, yet not
enough to be installed in a small place, and well adapted
to use in any type alarm box.
tight enough to bind.
These together with other objects and advantages which
will become subsequently apparent reside in the details
A nozzle 5 protrudes from the device and extends to the
outside of the ‘box in the vicinity of the manual box trip
of construction and operation as more fully hereinafter 40 ping lever or knob.
A hammer ‘lever 16 is cocked against pressure of driv
described and claimed, reference being had to the ac
ing spring 24 and is designed to cradle the CO2 cartridge
on its driving end in the hammer cradle 15.
numerals refer to like parts throughout, and in which:
A trigger 27 holds the hammer arm 16 in the cocked
FIGURE 1 is a view showing the back side of the
device in elevation, constructed in accordance with the 45 position. The trigger 27 may be adapted to any type of
lever or bell crank to operate the trip. Said trigger 27
invention, and installed on the back side of the front
should not interfere with the normal operation of the ?re
door of a ?re alarm box. The device is in the cocked
alarm box or restricted equipment.
position, ready to operate.
Upon tripping the alarm box or operating restricted
FIGURE 2 is a view showing the device in side eleva
50 equipment, the trigger 27 releases the arm '16 to the ten
tion with the CO2 cartridge inserted in the device.
sion of the driving spring 24. ‘The leverage of the ham
FIGURE 3 is a view showing the device installed in a
?re alarm box.
mer arm 16 being so great as to drive the cartridge 14 into
FIGURE 4 is a view showing the body of the device
the seal 11 and the hollow needle '13 to puncture the car
exploded and in section.
tridge 14 and seal it to the system.
Upon being charged with the pressure of the CO2 from
In carrying out the invention, referring now speci?cally
to the drawing, the device is shown attached to the inside
the cartridge 14, the gas passes into the passage 8, hollow
of the ?re alarm box door 33 by the fasteners 21 through
needle 13 and passage 17.
the ?ange 2. The main cylinder body 3 is drilled con
The gas ‘from passage 17 charges the cylinder 1 driving
centrically for the nozzle 5, the puncturing needle 19
the piston type capsule 34 deeper into the cylinder 1 and
and the piston cylinder 1. Gas passages 8 and 17 are 60 impaling it on the hollow needle 19.
drilled within the body. Passage 8 is sealed with the
Gas entering gas passage 8 escapes to the outer ori?ce
plug ‘9. The open end of the body 3 has ?ne external
7. This gas acts both as a syphon and an atomizing
threads for the cap 4. The cap 4 has external knurling
and internal threads matching the external threads of the
With the capsule 18 open to the hollow needle 19‘, ink
65 34 is both forced and drawn into the hollow needle 19 and
body 3.
The gasket ‘23 seals the cap 4 to the cylinder body 3.
expelled to the outside striking the de?ector plate 6 and
The liquid capsule 18 slides freely but not sloppily in
spraying over the hand of the person tripping the device.
the cylinder 1. It ?lls the space within the cylinder be
The device makes. it possible to ‘avoid embarrassing the
tween the needle 19 and the cap 4, but is short enough
innocent while not overlooking the guilty. Location of
to be free of the needle 19 to prevent puncture until the 70 the guilty individual can be detected by the distinctive odor
device is tripped. Said capsule has a concentric shoulder
prevailing in his presence. Positive identi?cation can be
to enable its removal from the cylinder 1. The Achilles’
made by the ink with the use of an ultra violet light.
companying drawing forming a part hereof, wherein like
The operation is instantaneous and about 10 drops of
liquid in a mist can be sprayed ‘before an individual can
remove his hand.
The foregoing is considered as illustrative only of the
principles of the invention. 1Further, since numerous
modi?cations and changes will readily occur to those
skilled in the art, it is not desired to limit the invention to
the exact construction and operation shown and described,
and accordingly, all suitable modi?cations and equivalents
may {be resorted to, falling within the scope of the inven 10
tion as claimed.
Having thus completely and ‘fully described the inven
tion, what is now claimed ‘as new is as follows:
1. Apparatus 'for assisting in detecting unauthorized
(G) a capsule type piston in said cylinder movable
under pressure from the ?rst mentioned passage,
(3) said piston being adapted to contain a detect
ing ?uid,
(4) said piston a fracturable wall;
(H) a hollow needle lying in the path of movement of
the piston when said piston is moved by the ?uid in
the ?rst mentioned passage,
(5) said second mentioned needle having an outlet
disposed in the second mentioned passage;
(I) and means for releasing said retainer.
2. Apparatus as de?ned in claim 1, in which the second
mentioned needle has an inlet end disposed in the cylinder
and the outlet end is disposed in the second mentioned
tampering with a signal device, such as a ?re alarm box, 15 passage.
comprising in combination:
3. Apparatus as de?ned in claim 1, in which the second
(A) van arm for initiating a signal;
mentioned passage terminates in a downwardly extending
(B) means for moving said arm;
de?ecting surface.
(C) a releasable retainer vfor ‘said means;
(D) a cartridge containing an expansi-ble fluid and 20
References Cited in the ?le of this patent
adapted to ‘be moved by said arm when said arm is
moved by said means,
('1) said cartridge having a fracturable wall;
Cilley ________________ __ July 18, 1916
(E) a hollow needle lying in the path of movement of
Palmer ______________ .._ Apr. 21, 1925
said cartridge and adapted to pierce said cartridge to
release the ?uid in said cartridge,
(2) said needle having a fluid outlet;
~ Burley _______________ __ Sept. ‘28, 1937
Sutermeister ___________ __ June 8, 1954
(F) means forming a cylinder and a ?uid passage lead
ing from said outlet to the cylinder, and forming a
passage leading from said outlet to atmosphere;
Blann ____________ __’____ Nov, 1, 1955
Larson _____ "a. ________ __ June 5, 1956
Harvey _.__._..'_.'_ ________ __ Nov. 12, 1957
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