U.S. patent number 3,752,637 [Application Number 05/180,071] was granted by the patent office on 1973-08-14 for unitary fingerpiece and ignition actuator.
This patent grant is currently assigned to Ronson Corporation. Invention is credited to David Norman, Keith Soane.
United States Patent |
3,752,637 |
Norman , et al. |
August 14, 1973 |
UNITARY FINGERPIECE AND IGNITION ACTUATOR
Abstract
A spark producing mechanism in which a hinge connects a
fingerpiece and a sparkwheel actuator or it can connect a
fingerpiece and a conventional snuffer cap such that an
inexpensive, one piece action is formed to ignite fuel emanating
from the burner valve of a cigarette lighter or the like.
Inventors: |
Norman; David (Sutton,
EN), Soane; Keith (Mickleham, EN) |
Assignee: |
Ronson Corporation (Woodbridge,
NJ)
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Family
ID: |
22659099 |
Appl.
No.: |
05/180,071 |
Filed: |
September 13, 1971 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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872003 |
Oct 29, 1969 |
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Current U.S.
Class: |
431/274;
431/344 |
Current CPC
Class: |
F23Q
2/08 (20130101) |
Current International
Class: |
F23Q
2/08 (20060101); F23Q 2/00 (20060101); F23q
001/02 () |
Field of
Search: |
;431/130,131,150,274,138,139 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Dority, Jr.; Carroll B.
Parent Case Text
This application is a continuation of application Ser. No. 872,003
filed Oct. 29, 1969 and which is now abandoned.
Claims
We claim:
1. In an ignition mechanism comprising a housing having a burner
valve fixed thereto at one end and ignition means adjacent said
burner valve for igniting fuel carried within said housing, a
combined carrier and fingerpiece comprising a single molded
structure being connected by a relatively thin flexible section
forming a hinge, means pivotally connecting said carrier with said
ignition means and means hingedly connecting an end of said
fingerpiece to said housing.
2. In an ignition mechanism as defined in claim 1 in which the
hinge is thinner in cross section than either the carrier or the
fingerpiece which allows bending to occur at the thinner
section.
3. In an ignition mechanism as defined in claim 1 further
characterized by said housing having an opening therein and a lip
on said fingerpiece mounted within said opening for pivotal
movement therein.
4. In an ignition mechanism as defined in claim 1 further
characterized by spring means which biases the fingerpiece to an
unactuated position.
5. In an ignition mechanism as defined in claim 1 in which the
means for igniting fuel comprises a flintwheel which is actuated by
said carrier and a flint against which the flintwheel rubs to
create a spark which ignites fuel emanating from the burner.
6. In an ignition mechanism as defined in claim 5 further
characterized by a clutch having a portion thereon which engages
the carrier and a tang which engages means on the flintwheel to
drive the flintwheel in one direction and to slip in the opposite
direction.
7. In an ignition mechanism as defined in claim 1 in which the
carrier extends to a point slightly beyond the ignition means and
does not overlie the burner valve whereby the burner valve is
exposed at all times.
Description
BACKGROUND OF THE INVENTION
This invention relates to an improvement in ignition mechanisms
particularly for use in cigarette lighters.
Prior art ignition mechanisms utilize a fingerpiece which is
connected by means of a gear segment to a carrier which straddles a
flintwheel. The flintwheel is generally constructed with ratchet
teeth molded integrally therein such that a clutch mechanism will
engage a tooth and rotate the flintwheel in one direction, however,
the clutch is made to slip in the opposite direction, thereby
precluding rotation in the opposite direction. Thus, to actuate the
prior art lighters, the fingerpiece is depressed and this rotates a
carrier or a snuffer member. As the latter member is rotated, it
carries with it a clutch which then serves to rotate the
flintwheel. When the fingerpiece is released, it returns to its
rest position, the carrier or snuffer member returns to its rest
position, the clutch slips and the flintwheel remains
stationary.
In the event that the gear segments on the fingerpiece and on the
carrier member do not mate well, the fingerpiece will not rotate
the carrier or snuffer member properly and the lighter will
malfunction. Another problem with the prior art construction is
that dust particles which are created when the flintwheel rubs the
flint get in the crevices between the fingerpiece and the carrier
or snuffer member which tends to jam the mechanism causing it to
malfunction. Special fixtures must be made in order to insure the
proper mating of the fingerpiece and the carrier or snuffer member
which adds to the cost of assembly.
SUMMARY OF THE INVENTION
According to the present invention the flintwheel carrier member
and the fingerpiece are directly connected by a hinge which is
preferably a plastic such as polypropylene, however, any flexible
material will accomplish the purposes of this invention. The hinge
may be suitably secured with the carrier member and fingerpiece by
means of a suitable adhesive, but in a preferred form of the
invention the fingerpiece and carrier are formed integral with the
hinge. Thus, by using a hinged connection between the fingerpiece
and the carrier, the gear segment connection has been eliminated.
Concomitant therewith is the savings in cost, time and labor
associated with the manufacture of the cigarette lighter.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a side view of the upper portion of a cigarette lighter
partly in section, and
FIG. 2 is a side view of a cigarette lighter in the actuated
position,
FIG. 3 is a sectional view showing a clutch and sparkwheel.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIG. 1 there is shown a portion of a cigarette lighter
having a housing 10 which can be plastic or metal and can have a
decorative sheath (not shown) snugly enclosing the housing 10. A
well 11 is formed in a portion of the lighter in which there is
received a burner valve 12. The burner valve can be any known
burner valve commonly found in cigarette lighters using gaseous
fuel such as butane, or the burner valve can be replaced by a wick
in the case of a lighter using a hydrocarbon, such as lighter
fluid, as the fuel. The fuel is supplied to the valve or wick by
means of a fuel reservoir formed in the body of the cigarette
lighter.
A conventional flint 13 and flint spring 14 are housed in a bore 15
which is normally closed by a removable cover (not shown) on the
base of the lighter. A conventional flintwheel 17 is mounted on an
axle 16. The axle 16 is journalled in opposed ears 18 formed on the
lighter housing 10. A clutch 19 which can be stamped from a sheet
of metal has an offset tang 20 which engages ratchet teeth 17a on
the flintwheel in the manner of a ratchet and pawl. The clutch is
rotatably mounted on the axle 16 and has a flat portion 21 which is
engaged by a carrier 22.
The carrier 22 is in the form of a U-shaped member which straddles
the flintwheel 17 and the clutch 19. Thus, when the carrier 22 is
rotated, it engages the flat portion 21 of the clutch and imparts
rotation to it. The tang 20 on the clutch engages a tooth 17a on
the flintwheel and thereby rotates the flintwheel 17. When the
carrier 22 returns to its rest position shown in FIG. 1, the clutch
clips on the inclined teeth 17a so no rotation is imparted to the
flintwheel 17 in the reverse direction.
A fingerpiece 23 which can have a U-shaped cross section is
connected to the carrier 22 by means of a hinge 24. The hinge can
be integral with the carrier and fingerpiece whereby the latter
elements can be molded in one piece or the hinge 24 can be glued or
otherwise secured to the carrier and fingerpiece to form a unitary
connection. The fingerpiece 23 has a lip 25 integrally formed at
one end thereof. The lip extends into an opening 26 for pivotal
movement therein. The lip 25 preferably does not extend fully into
the opening and if desired the outer end of the opening 26 can be
plugged so as to create a pleasing appearance. A spring 27 has one
end 27a which bears on a shelf 28 on the lighter housing 10. The
other end 27 b of the spring 27 resiliently urges the fingerpiece
23 to its unactuated position as shown in FIG. 1.
In operation, the user depresses the fingerpiece 23 against the
bias of the spring 27. Since the carrier 22 is connected to the
fingerpiece it will be urged downwardly with the forward portion of
the fingerpiece. The carrier 22, it should be noted, can cover the
well 11 in the same manner that a snuffer on a conventional lighter
does. The carrier 22 grips the flat portion 21 of the clutch 19
whilst the tang 20 on the clutch engages a tooth 17a on the
sparkwheel. The sparkwheel rotates and rubs against the flint 13
thereby causing a shower of sparks to ignite fuel issuing from the
burner valve or wick 12. Any known mechanical linkage can be used
between the fingerpiece or carrier and the valve 12 to actuate the
latter and cause fuel to emanate from the burner. The lighter is
shown in actuated position in FIG. 2.
* * * * *