U.S. patent number 3,898,765 [Application Number 05/486,639] was granted by the patent office on 1975-08-12 for flying toy projectile.
Invention is credited to Douglas J. Lee.
United States Patent |
3,898,765 |
Lee |
August 12, 1975 |
Flying toy projectile
Abstract
A toy projectile which has a channel through the fuselage and is
launched from a rod on which the fuselage is slidably mounted, is
made more controllable by having the rod engage in the channel as a
key in a keyway.
Inventors: |
Lee; Douglas J. (Houston,
TX) |
Family
ID: |
23932680 |
Appl.
No.: |
05/486,639 |
Filed: |
July 8, 1974 |
Current U.S.
Class: |
446/63 |
Current CPC
Class: |
A63H
27/14 (20130101); A63H 27/00 (20130101) |
Current International
Class: |
A63H
27/14 (20060101); A63H 27/00 (20060101); A63h
027/14 () |
Field of
Search: |
;46/81,74B
;124/5,21 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Mancene; Louis G.
Assistant Examiner: Cutting; Robert F.
Attorney, Agent or Firm: Johnson; Kenneth H.
Claims
The invention claimed is:
1. A system for achieving glider flight comprising a launching
means comprising a rod having at least one flat surface
longitudinally thereon and a projectile comprising an elongated
fuselage, at least two aerodynamically stabilizing wings projecting
from said fuselage and a channel extending longitudinally through
said fuselage, said channel having a configuration adapted to
cooperatively receive said rod therethrough and a flat surface for
slidably engage said flat surface on said rod for preventing
rotation of said projectile about said rod when said rod is engaged
through said channel.
2. The system according to claim 1 wherein said channel is
substantially cylindrical and said flat surface comprises at least
a plug at one end of said channel and extending partially into said
channel.
3. The system according to claim 2 wherein said rod has a handle on
one end thereof.
4. The system according to claim 3 wherein said plut is at the end
of said channel nearest said handle.
5. The system according to claim 2 wherein there is a plug
extending partially into said channel at both ends of said
channel.
6. The system according to claim 2 wherein said channel and flat
surface plug form a semicircular slot.
7. The system according to claim 6 wherein said rod has a
semicircular cross-section.
8. The system according to claim 1 wherein said channel has at
least one roller mounted therein for contacting said rod.
9. The system according to claim 1 wherein said rod has a plurality
of ball bearings movably mounted on the surface thereof for
contacting said channel and reducing friction and drag.
10. A flying projectile comprising an elongated fuselage, at least
two aerodynamically stabilizing wings projecting therefrom and a
channel extending longitudinally through said fuselage said channel
having at least one flat surface therein extending along at least a
portion of said channel.
11. The projectile according to claim 10 wherein said flat surface
comprises a plug extending partially into said channel.
12. The projectile according to claim 11 wherein said plug and
channel form a semicircular slot.
13. The projectile according to claim 12 wherein a plug partially
extending into said channel is adjacent to both ends of said
channel.
14. The projectile according to claim 10 wherein a hook extends
angularly from said fuselage.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a toy projectile or more
particularly a toy airplane which is launched into the air from an
elongated rod. In particular, this invention relates to projectiles
which have no force of their own, such as air screws or jets, but
which have the launching force provided to the projectile from an
outside source. The principal source of outside power for such
projectiles has been hand launching, that is, the projectile, an
airplane in this instance, is held in the hand of the operator and
the projectile tossed or thrown by the operator. This method works
adequately well, however, hand launching may be erratic and is
limited in the amount of force that may be applied to projectile.
The amount of lift provided to the wings of the projectile is
determined by the initial thrust from the hand launching. It has
been found in the past that hand launching can be improved if the
projectile is launched from a rod. The rod provides a uniform path
for the projectile's initial thrust, so that each launch is
predictably uniform and in addition, a greater velocity can be
applied to the projectile with a minimum of effort. By using the
launch rod, an operator can develop the requisite skill of
manipulation in only a short while. The launch rod allows the use
of principally wrist action. The flight of the projectile from the
launch rod for an individual operator is generally of greater
length than can be achieved by the operator by hand launching.
A launch rod was employed, for example, in the game projectile
described in U.S. Pat. No. 3,264,777, which is representative of
the rod launched toys. Generally, a toy projectile consists of a
body or fuselage, with wings or fins and a tail assembly and an
opening extending longitudinally through the fuselage, which is
adapted to fit over the rod launcher. The opening in the fuselage
is large enough, such that projectile will move freely along the
launch rod. A problem encountered with the arrangement has been the
tendency of the projectile to rotate about the axis of the
cylindrically shaped rods of the prior art. If the projectile
rotates from the horizontal alignment of its center of gravity the
flight path will tend to veer off too much to the side. This may be
desirable at times, however, it is not controllable with the prior
art arrangements.
Since the prior art employed cylindrical rods for launching, the
opening through the fuselage has a corresponding cylindrical
opening. The regular configuration of the opening through the
fuselage can create eddies and internal currents which can so
disturb the air behind the projectile that a partial vacuum is
formed. This partial vacuum has the same effect as the partial
vacuum created by the camber of the wing, but instead of helping to
lift the projectile it tends to drive it backward.
Another disadvantage noted with the prior art launch systems has
been a certain amount of drag resulting from the friction of the
launch rod with the channel through the fuselage.
The opening through the fuselage also serves to reduce the weight
of the projectile, since once it is air borne, it is a glider or
soaring type of toy dependent not only on the velocity imparted to
it by the launch, but on the existing ambient wind and air
currents. Thus, the empty space of the channel does serve a very
useful purpose in lightening the plane notwithstanding the
disadvantages as noted hereinabove.
A further disadvantage of the prior planes is that they can be
launched with high velocity only from the launching rod.
The principal advantages of the present toy projectile are, (1) it
has a means of controlling attitude of the projectile to the
horizon, (2) it has reduced internal friction between the launch
rod and the channel through the projectile and there is reduced
drag. Another advantage of the present projectile is the ability of
the operator to select and control the flight path of the
projectile. A particular feature of the projectile is an adapter
that allows the operator to use a sling shot type of launch as an
alternate to the rod. A further feature is cooperative
interrelationship of the rod and channel and in particular the
improvement in the rod to further reduce drag. These and other
features and advantages will become apparent from the overall
discussion of the toy projectile of the invention.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is an isometric view of the projectile and the launch rod in
functional relationship.
FIG. 2 is a rear elevation of the present projectile.
FIG. 3 is an isometric view of a launch rod according to the
present invention.
FIG. 4 is a rear elevation of an alternate embodiment of the
present projectile.
FIG. 5 is an isometric view of one embodiment of the present
projectile and a transparent projection into the fuselage of the
projectile.
FIg. 6 is a cross-sectional elevation taken on 6--6 of FIG. 5.
FIG. 7 is a side elevation of one embodiment of a launch rod.
FIG. 8 is an enlarged cross-sectional elevation of the launch rod
taken on 8--8 of FIG. 7.
SUMMARY OF THE INVENTION
The present invention relates to improvements in flying toy
projectiles. Briefly stated the invention is a system comprising a
launching means comprising a rod having at least one flat surface
longitudinally thereon and a projectile comprising an elongated
fuselage, at least two aerodynamically stabilizing wings projecting
from said fuselage and a channel longitudinally through said
fuselage, said channel having a configuration adapted to
cooperatively receive said rod therethrough and a flat surface to
slidably engage said flat surface on said rod to prevent rotation
of said projectile about said rod when said rod is engaged through
said channel.
DETAILED DESCRIPTION OF THE INVENTION
The projectile may very generally be described as an airplane.
However, this is only a very general use of the term and the
invention broadly encompasses any aerodynamic structure having
lifting or flight characteristics, that is, an airplane of the
conventional type, e.g., having wings and tail fin, saucer shaped
structures, older bi- or tri-winged airplanes, rockets, and the
like.
The projectile may be made of a number of materials such as balsam
wood, foamed plastics such as polystyrene, polyurethane; or molded,
casted, extruded, vacuum formed or injected plastics such as,
ethylene or PVC. Very conveniently the projectile may be produced
from foamed plastic in a single unit, i.e., fuselage, wings and
tail are all assembled in a single step by foaming the plastic in
the mold. The launch rod may be made of wood, metal or a polymeric
material, e.g., have a handle at the end, or may have an offset or
dog leg (not shown) adjacent to the handle. This allows the tail of
the projectile to set back against the handle. The rod will
generally be from about 12 inches to 30 inches in length.
Referring now to FIG. 1 a toy projectile A according to the present
invention is shown in perspective. In this embodiment the
projectile is represented as an airplane having fuselage 3, wings 1
and tail 2. At the front of fuselage there is a semicircular
opening 4. This opening 4 is the entrance into a channel or
passageway 8 (shown in FIGS. 5 and 6) which passes through the
fuselage 3 and exits at opening 7, adjacent to the tail 2. Also
shown in FIG. 1 is a launch means B comprised of launch rod 5 and
handle 6. The launch means B is in cooperative alignment with
opening 7 and channel 11, such as that existing immediately before
the rod is inserted through opening 7 and along channel 8
preparatory for the launch of the projectile or immediately after
the projectile A has been launched.
The interrelation and cooperation between the projectile A and
launch means B comes about when the projectile is seated onto the
rod 5 through channel 8 preparatory for the launching and flight of
the projectile. The rod 5 is generally longer than the fuselage 3,
but need not be and the projectile is generally seated by means of
channel 8, well back, even to abutting handle 6, on the rod 5, with
a portion of rod 5 projecting out of opening 4 and extending beyond
the fuselage.
In so doing the channel 8 and rod 5 are in cooperative engagement
much as a keyway and key, respectively. The rod 5 will have the
same configuration as the channel 8 such that said configuration
will not allow the projectile to rotate about the rod, thus almost
any configuration of channel 8 or portion of the channel and rod 5
corresponding thereto is contemplated other than circular. In FIGS.
1 and 7 it can be seen that configuration of openings 4 and 7 and
rod 5 are semicircular.
Referring now to FIGS. 5 and 6, which could be the projectile of
FIG. 1, it can be seen that the channel 8 is indeed circular over
most of its length, but that plugs 9 have been inserted at both
ends of the channel 8 to create semicircular openings 4 and 7. The
shape of opening is not critical, so long as it will accommodate a
rod having a corresponding shape, such that the cooperative
engagement of the rod into the channel will prevent the projectile
from rotating about the rod.
This key-keyway arrangement allows the operator to predetermine and
control the attitude of the projectile to the horizon. That is, if
straight flight away from the operator is desired, then operator
can launch the projectile by moving the rod with the projectile
seated thereon, shapely down, in same manner a rod in fly casting
is handled and as the rod comes into line with the vector of force
applied by the forward motion of the rod the projectile will slide
off of the rod 5 and into flight. The prior rods were circular so
that the projectile could rotate and come off the rod in flight
with wings canted angularly to the horizon. The flight path would
then be angled to the right or left, rather than on the straight
flight path sought by the operator. The present invention can
prevent the inadvertent deviation of the project from the selected
flight path by seeing that projectile leaves the rod in that path.
Similarly, the operator can now select flight paths, such as one
angled sharply to the right or left and achieve a launch along said
flight path.
Although channel 8 in FIG. 5 is shown as circular with plugs 9
inserted (or molded therein) the entire channel could have a
semicircular configuration. Generally the cooperative configuration
of the channel 8 can be described as having at least one flat
surface therein to cooperatively engage a corresponding surface of
a rod to thereby prevent rotation of the projectile about said rod.
As noted the flat surface need not be continuous through the
channel. A plug 9 only adjacent to tail 2 would serve the same
function of the plugs at both front and rear of the projectile as
shown in FIG. 5. Similarly a flat surface could be comprised of a
series of single member or rods which would function as a
surface.
In FIG. 5 a further embodiment is also depicted. Located along the
channel 8 are one or more rollers 10. Referring to FIG. 6, the
roller 10 is seen to be rotatably mounted on axle 12 such that the
surface of roller 10 will be in cooperative engagement with the
surface on rod 5. It can be readily appreciated that plugs 9 can be
replaced with rollers 10 to create the flat surface as described
above. The rollers may cause less drag than the plugs when they
contact the rod thus putting more of the force exerted by the
operator into momentum of the projectile.
Both the plugs 9 or any other obstruction within channel 8 serve
another function which is to destroy the regularity of the round
channel and thereby reduce the likelihood of eddies and internal
currents within the channel which can so disturb the air behind the
projectile that a partial vacuum is formed. The partial vacuum
created can be a substantial drag.
Referring now to FIG. 4, an alternate embodiment is shown to that
of FIG. 1, in that the semicircular opening 7 is inverted from that
shown in FIG. 2, thus the channel 8 would be inverted likewise.
A further feature of its present projectile is its versatility in
that hook 11 shown in FIGS. 5 and 11 allows the projectile to be
launched from a catapult device much as a sling shot.
FIG. 7 shows the launch means portion of the present invention in
another embodiment wherein one or more ball bearings 13 are
rollably seated in the rod 5 to further reduce friction as the
projectile slides along the rod during launching. Also on the rod
are fins 14 which are intended to allow only a point of contact and
to keep the major portion of the body of the rod 5 from contacting
the inner surface of the channel 8. In FIG. 7 the arrangement of
the fins 14 can be better seen and the relationship to the channel
8. The ball bearing 13 can be seen seated in pocket 15 which allows
bearing 13 to roll but not come out of the pocket.
* * * * *