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Патент USA US2405469

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Aug., 6, l946°
2,405,469
F. J. TIRREL
PLANK 0R BOARD JOINT
Filed July 22, 1944
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Patented Aug. 6, 1946
2,405,469
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UNITED STATES PATENT OFFICE
2,405,469
PLANK OR BOARD JÜINT
Frank J. Tirrcl, George, Iowa.
Application July 22, 1944, Serial No. 546,164
1 Claim. (Cl. 304-40)
2
1
My invention relates to a joint device for
boards or planks.
An object of my invention is to provide a joint
which is adapted to retain and securely hold the
end joints between adjacently placed boards or Ul
tremities thereof, are the upper iiat straps II
which are attached by means of welding or by
any other suitable method. Attached beneath
the members Il) are a pair of further straps I 2
between which is provided a space I3, and ham
mered into the straps I2 are a series of project
A further object of my invention is to provide
ing points Ill. The straps I2Aare equally spaced
a joint of this nature which will accommodate a
apart from the center of the arrangement.
The sides or depths I5 of the members I0 are
made slightly larger than the maximum thick
ness of the boards or planks to be used, and will
thereby accommodate' planks of lesser thickness.
The members Il) are of fairly'substantial length,
planks.
variety of plank sizes.
_
`
A further object of myy invention is to provide
a device of this character wherein more than
two joints can be accommodated if desired, and
to provide the device in a very simple construc
tion, and which can be manufactured at a reason
and the straps II include the small centrally ar- `
ranged openings I6 therein.
~ able cost.
The arrangement is used in the following man
With these and other objects in view, my in
vention consists in the construction, arrange
ment, and combination of the various parts of
my device, whereby the objects contemplated are
attained, as hereinafter more fully set forth,
pointed out in my claim, and illustrated in the
accompanying drawing, in which:
ner. The planks indicated by the character I'l
are placed beneath the straps I I with their abut
ting ends I8 being placed over each one of the
lower straps I2', with the points of abutment at
I8 being centrally positioned. The arrangement
is then ready for use, and it will be noted that
any pressure downwardly in the direction of the
Fig. 1 is a plan view of the joint,
~
arrow I9 (see Fig, 3) will be supported due to
Fig. 2 is a section of Fig. l, taken along the
lines 2--2 thereof,
'
25 the arrangement of the straps I I and I2 and due
to the levering action therebetween.
Fig. 3 is a section corresponding to Fig. 2
The small projections I4 will serve to bite into
showing the planks or boards in place in the
the boards‘g, thereby additionally securing the
joint,
same, although I have found through actual use
that the planks are otherwise iirmly retained.
The width between the members Il] will permit
of a variety of plank widths also. If desired,
¿nails 2|] can be driven through the openings IS,
Fig. 4 is a plan view of Fig. 3,
Fig. 5 is side elevation showing the planks and
joints in their assembled position being supported
by saw-horses, and
Fig. 6 is a side elevation showing the use of
more than one joint.
into the planks for additional retention, though
My invention contemplates the provision o_f a 35
simple, strong, and durable joint in which the
ends of adjoining planks can be placed,> and
wherein the planks will then be firmly held and
supported against any downward pressure. Such
a joint is especially desirable when it is neces
sary to use a pair of boards or planks to provide
a greater length, or in some cases where a few
this is not usually necessary.
.
Fig. 5 shows a joint supporting a, pair of planks
which are supported Vby the horses 2|, and Fig. 6
illustrates the use of two joints, accommodat
ing three planks.
It will now be seen that I have provided all
of the objects of my invention, that my inven
tion possesses >the advantages hereinabove stated,
shorter pieces of board can be more conveniently
carried up a stairway, and then assembled with
the joints, rather than carrying up an extremely
with further advantages being readily apparent.
employed for the necessary strength. Attached
tween, straps attached to, and beneath said side
55 members for engagement with the ends of the
Some changes may be made inthe construc
tion and arrangement of the parts of my inven
tion Without departing from Ithe real spirit and
long plank around the stairway bends, etc., which
purpose of my invention, and it is my intention
in some cases is relatively impossible. My in
to cover by my claim any modified forms of
vention also contemplates the use of such a joint
structure or use of mechanical equivalents which
for those instances where only shorter planking
may
be reasonably included within its scope.
is available, as well as other reasons.
50
I claim as my invention:
I have used the character I0 to designate the
A plank joint comprising a pair of spaced side
two side pieces of the joint, preferably made of
members adapted to receive plank ends therebe
steel, although other suitable materials can be
across and to the members Ill, and at the ex
2,405,469
3
planks, further straps attached to and above said
side members, and at the extremities thereof for
receiving planks thereunder whereby downward
pressure on the plank ends will prevent relative
movement of the plank ends and will secure the
same, said lower straps being spaced apart, and
being attached centrally of said joint, said lower
4
straps including projections for engaging into
the plank surfaces, said upper straps having
openings for the reception of securing nails, said
side members being of a depth to receive various
plank thicknesses, and being spaced sufliciently
to receive various plank widths.
FRANK J. TIRREL.
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