U.S. patent number 3,857,379 [Application Number 05/350,055] was granted by the patent office on 1974-12-31 for slingshot-type device with elastic propulsion means.
Invention is credited to Edward Lewis Burghardt.
United States Patent |
3,857,379 |
Burghardt |
December 31, 1974 |
SLINGSHOT-TYPE DEVICE WITH ELASTIC PROPULSION MEANS
Abstract
A slingshot type device for projecting shots or arrows. The
device has a carriage which has the ends of two elastic members
attached thereto. The carriage is manually moved forwardly on guide
rails, during which time the elastic members are stretched. While
the carriage is being moved forwardly the opposite ends of the
elastic members are attached to a gate member. The carriage is
moved forwardly until it becomes locked to the forward end of the
device. A trigger is operated on to permit the gate member to pivot
and release the tensioned elastic members to project a
projectile.
Inventors: |
Burghardt; Edward Lewis
(Vernal, UT) |
Family
ID: |
23375044 |
Appl.
No.: |
05/350,055 |
Filed: |
April 11, 1973 |
Current U.S.
Class: |
124/20.1;
124/20.3; 124/35.1; 124/22; 124/41.1 |
Current CPC
Class: |
F41B
3/005 (20130101); F41B 7/04 (20130101) |
Current International
Class: |
F41B
3/00 (20060101); F41B 7/04 (20060101); F41B
7/00 (20060101); F41b 007/00 () |
Field of
Search: |
;124/35R,27,28,29,17,2R,2B,41,22 ;43/6,19 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Marlo; George J.
Assistant Examiner: Browne; William R.
Attorney, Agent or Firm: Krebs; Robert E.
Claims
I claim:
1. A sling-shot type device comprising:
a. a frame;
b. a guide having a free end and being fixedly connected to said
frame and extending from said frame;
c. a carriage means adapted to slide forwardly along the guide
while tensioning elastic members anchored thereto so as to project
a projectile, said carriage means includes an integral lever member
for use in pressing said carriage toward the free end of said guide
and a pair of bifurcated members fixedly connected to the carriage
means and which extend outwardly from said carriage means;
d. catch means connected to said free end of said guide and adapted
to selectively catch and hold said carriage near said free end;
e. a pair of elongated elastic members, each of which is connected
at one end to a corresponding one of said bifurcated members;
f. means flexibly connecting the other ends of said elastic members
together;
g. gate means mounted on said frame for selectively and directly
holding said connecting means when said carriage means is slid
towards and caught at said free end of said guide thereby to place
said elastic members in tension and for selectively releasing said
elastic members through a pivotal movement thereof under bias of
the elastic members to permit disengagement of the connecting means
from said gate means; and
h. trigger means mounted on said frame and operatively connected to
said gate means to release the same by moving said trigger
means.
2. A device according to claim 1 wherein said guide comprise a pair
of spaced-apart parallel members.
3. A device according to claim 1 wherein said gate means comprises
a parallel pair of spaced-apart rods, which are mounted to swing
about an axis which is fixed transversely to the direction of the
motion of said carriage means and spaced thereabove, said rods
being spaced apart enough to hold said connecting means
therebetween when said connecting means encompases a shot.
4. Advice according to claim 3 wherein said gate means further
includes means actuated by said trigger means to selectively
restrain said spaced-apart rods from swinging below said axis.
5. A device according to claim 4 wherein said means actuated by
said trigger means comprises a member mounted for reciprocative
motion according to the position of said trigger means and which,
in one position, interferes with the swinging of said rods and, in
another position, frees said rods to swing.
6. A device according to claim 1 which further includes a member
mounted on said frame, said member having an open-topped groove
formed therein which extends parallel to the direction of
contractive motion of said elastic member which is positioned to
hold an arrow to be propelled by said elastic members.
7. A device according to claim 1 wherein said frame includes a
shoulder piece for holding said device in a rifle-like fashion and
the length of said shoulder piece from its end to said gate means
exceeds the natural length of said elastic members.
8. A sling-shot type device comprising:
a. a frame including a shoulder stock to be held in a rifle-like
fashion;
b. a pair of parallel, spaced-apart guide members fixedly extending
from said frame;
c. a carriage means which is slidably disposed on said guide
members and which includes an integral lever member for use in
pressing said carriage toward the free end of said guide members
and a pair of bifurcated ears which fixedly extend outwardly from
said carriage;
d. catch means connected to said free ends of said guide members
and adapted to selectively catch and hold said carriage near said
free end;
e. a pair of elongated elastic members, each of which is connected
at one end to a corresponding end of said bifurcated ears;
f. means flexibly connecting the outer ends of said elastic members
together;
g. gate means mounted on said frame for directly engaging said
connecting means and for selectively releasing and holding said
connecting means after said carriage means is slid towards and
caught and held at the free end of said guide members thereby to
place said elastic members in tension, said gate means including a
parallel pair of spaced-apart rods which are mounted to swing on a
shaft which is fixed transversely to the direction of motion of
said carriage so that said rods hang downward therefrom, said rods
being spaced apart sufficiently to hold said connecting means
therebetween when said connecting means encompases a shot;
h. trigger means mounted on said frame and operatively connected to
said gate means to release the same by moving said trigger, said
trigger means including a member operatively connected thereto to
selectively prevent the rods from swinging therepast.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention generally relates to a slingshot type device for
shooting small shot and, more particularly, to such a device which
is cocked and then selectively released.
2. Introduction to the Invention
My invention provides a novel and improved slightshot-like device
which is both powerful and safe. It is intended primarily as a
hunting weapon for small game such as squirrls and the like, but it
can also be used for target shooting.
Slingshots and similar resilient-action devices are very old in the
art of weaponry. However, little effort has been made towards
improvement by using modern materials to provide novel devices
which are safe, light-weight and more powerful.
BRIEF DESCRIPTION OF THE DRAWINGS
Further advantages of my invention may be readily understood by
referring to the following description and appended illustrations,
which are offered by way of example only and not in limitation of
the invention, whose scope is defined by the appended claims and
equivalents, and not by any preceding description. In the
drawings:
FIG. 1 is a side view of a device according to my invention,
FIG. 2 is a side view of a particular modification of the device of
FIG. 1;
FIG. 3 is a sectional detail taken along the line 3--3 in FIG. 1
viewed in the directions of the arrows and enlarged for
clarity;
FIG. 4 is a detail view, partially cutaway and enlarged for
clarity, of the portion of the device encompased by the curved
arrows 4--4 in FIG. 1 which illustrates another position of the
components of the device.
FIG. 5 is a sectional detail taken along the line 5--5 in FIG. 4,
viewed in the direction of the arrows; and
FIG. 6 is a prespective view, enlarged for clarity of a particular
component of the device of FIG. 1.
In the drawings, components are given a unique reference number
which they keep no matter how many views the component are shown
in, thereby to assist the reader in understanding the detail
views.
DETAILED DESCRIPTION
My device, as shown in FIG. 1, generally resembles a rifle. It
includes a shoulder-piece 11 with an integral forearm 13 which
serves as a frame for fixedly supporting two forwardly extending,
parallel members 21 and 22. The members 21 and 22 are tubes (see
FIG. 3) and, although they may have any cross-sectional shape, they
are shown as being circular in cross-section. The tubes are made of
a strong, lightweight material, such as aircraft tubing. A closure
member 26 caps the ends of the tubes and holds them spaced
apart.
A carriage, generally designated 28, slides back-and-forth the
length of the tubes. The carriage 28 comprises a pair of
cylindrical members 29 and 30 which are externally fixed together
and which slidably embrace the respective tubes 21 and 22. A lever
member 34 extends substantially below and perpendicular to the
lower cylindrical member 30. The carriage 28 also comprises a pair
of ears 36a and 36b which fixedly extend upward and outward from
the upper cylindrical member 29. When viewed from the rear of the
device, the ears form a y shape with the lever 34 (see FIG. 3).
The carriage 28--comprising the tubular members 29 and 30, the ears
36a and 36b, and the lever 34--is releasably caught at the forward
end of the guide tubes 21 and 22 by a catch member 41. The catch
member 41 is a resilient arm whose one end is connected to the cap
26 and whose other end is barbed to ride up onto the forward end of
the carriage. The carriage has a slot 39 at its forward end into
which the barb drops and a peg 43 is fixed to one of the tubes to
stop the forward movement of the carriage after the barb has seated
in the carriage.
A pair of elastic members 46a and 46b are fitted over the ends of
the ears 36a and 36b. The elastics may, for example, be
surgical-type rubber tubing. In the preferred embodiment, the ends
of the ears 36a and 36b are bent back and the tubing is slipped
thereover; in such an arrangement, the resilient tubing holds to
the ears even when stretched--somewhat in the manner of a Chinese
finger puzzle. The other ends of the two elastics are connected to
a pouch 48 which holds shot or the like and which is typical with
slingshots.
A gate, generally designated 51, is provided to selectively retain
a shot-containing pouch when the elastics 46a and 46b are
stretched. The gate includes a vertical support member 53 whose
lower end is fixed to the stock 11 and whose upper end is bent
cross-wise over the stock. A bushing 55 is rotatably mounted on the
cross-wise end of the support and a pair of parallel rods 56a and
56b fixedly extend from the bushing to swing on the support above
the stock. (FIG. 1 shows the rods 56a and 56b swinging forward.)
The rods are spaced apart so that the pouch can be pulled
therethrough when it is doubled-over empty but not when it holds
shot.
A means 58 is mounted on the stock and is activated by the trigger
17 to selectively stop the rods from swinging forward. The
illustrated stop means includes a member having a broadened
chisel-shaped upper end 59 and a stem 59a. The means 58 is normally
biased upward so that the broadened upper end interferes with the
swinging of the rods 56a and 56b. The lower end of the stem 58 is
connected to the trigger 17 so that pulling the trigger causes the
stop means 58 to move downward and, thereby, release the rods 36a
and 36b to swing forward under the urging of the elastic members.
More particularly, the stem and broadened portions of the stop
means 58 are slidably retained by a bushing member 60 (see FIG. 6)
which is fixed into an appropriately stepped aperture in the stock
11. The bushing has a reduced-diameter portion which fits the stem
58 and enlarged-diameter portion including a rectangular,
transversely-extending slot 61 which maintains the broadened end of
the stop means lengthwise across the stock 11. In other words, the
stop means is kept in a position such that, when raised, it will
stop the swinging of the gate.
In the illustrated embodiment, the trigger 17 comprises a generally
L-shaped lever into whose apex is fixed a bushing 63 which, in
turn, is rotatably mounted on an axle 65. The axle is fixed between
a pair of flanges 67 which are fixed into a cavity 62 formed in the
stock 11. The forwardly extending end 69 of the trigger 17 engages
a circumferential slot 71 formed in the stem 59a of the stop means
58 so that the stem follows the trigger 17 and visa-versa.
In the illustrated embodiment, a coil spring 64 is mounted so as to
normally urge the stem upward, thereby pivoting the trigger
clockwise. Accordingly, when the trigger is pulled, the spring is
placed in compression and the stop piece is pulled downward,
thereby releasing the gate 51.
It should be clearly understood, however, that many arrangements
could be devised whereby the trigger could activate the gate stop
means, and that the aforedescribed linkage is exemplary only.
FIG. 2 illustrates an embodiment wherein the device of FIG. 1 is
modified for shooting arrows. An arrow guide member 71, comprising
an enlogated piece having an arrow-holding groove 72 formed
lengthwise along its upper surface, is fixed to the top of the
forearm 13. The illustrated arrow guide member has a forward end
which extends forward through the spaced-apart ears 36a and 36b
thereby to offer further guidance to an arrow. The rearward end of
the arrow-guide member 71 may extend back past the gate 51 so long
as clearance is provided for the rods 56a and 56b to swing and,
also, so long as a slot is provided for the stop means 58 to rise
to contact the rods. Also, in this modification, the
afore-mentioned pouch is replaced by a bowstring 48a which is fixed
at opposite ends to the elastics 46a and 46b.
In operation of the device of FIG. 1, a shot is placed in the
doubled-over pouch 48 and the gate is swing clockwise so that the
rods 56a and 56b pinch the pouch therebetween, thereby holding the
shot in the pouch. Then the trigger is relaxed so that the stop
means is biased upward stopping the rods from swinging forward
therepast (see FIG. 5). Then the carriage is moved forward by
pressure on the lever 34 until the carriage is caught by the catch
means 41, thereby placing the elastics in tension and cocking the
device. The force on the lever 34 is easily applied by foot. It
should be noted that when foot pressure is applied against the
lever, the device will normally be pointed downward so that, should
it unexpectedly release, the shot will be propelled downward; in
other words, the device is quite safe to cock.
The cocking procedure for the embodiment of FIG. 2 is exactly the
same, except that the bowstring 48a, which replaces the pouch 48,
is slipped around the two rods 56a and 56b. Furthermore, the arrow
is set in the groove 72 in the arrow guide 71 only after the device
has been cocked.
Thereafter, the device can be aimed and fired. That is, the trigger
is pulled to lower the stop means, thereby to release the gate
means 51 to allow the rods 56a and 56b to swing forward. The
elastics 46a and 46b will then snap forward propelling the shot at
the target. In this connection, it should be noted that the
preferred dimensions of the device comprise an important safety
feature. To wit; the length of the stock 11 (i.e., the distance
from the butt end to the gate 51) should exceed the relaxed length
of the elastic members 46a and 46b; consequently, if the elastics
should break before the device is fired, they will not snap back
far enough to injure the shooter's face.
The foregoing description is illustrative only and many other
modifications of the aforedescribed device, in addition to those
already mentioned, will readily suggest themselves to a person
skilled in the art without departing from the scope of the
following claims.
* * * * *