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Патент USA US3089292

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May 14, 1963
J. D. TENNISON
3,089,282
TERMITE SHIELD
Original Filed Nov. 30, 1950
INVENTOR.
J. D. TENNISON
'
ATTORNEY
United States Patent 0
1
3,089,282
TERMITE SHIELD
James D. Tennison, 450 N. Beilevue, Memphis, Tenn.
Original application Nov. 30, 1950, Ser. No. 198,359, now
Patent No. 2,674,765, dated Apr. 13, 1954. Divided
and this application Apr. 12, 1954, Ser. No. 422,555
2 Claims. (Cl. 50-73)
3,089,282
Patented May 14, 1963
2
tion to provide a novel joint for termite shields whereby
a plurality of individual shields may be rapidly and con
veniently assembled with no requirement for the use
of tools, other materials, or particularly skilled labor.
It is a further object of the present invention to provide
a novel termite shield manufactured with a joint as an
integral portion of the extremity thereof so that opposed
extremities of adjacent shields may be interengaged, pro
viding an efficient ‘and secure lock therebetween.
This invention relates to termite shields and more par
It is a further object of the present invention to provide
ticularly to a lock joint whereby a plurality of such shields 10
a novel lock joint for termite shields which will extend
may be readily and conveniently assembled without re
transversely across said shields for the entire width there
quiring the use of special or other tool-s, equipment, or
of, including horizontally disposed central portion and
other materials.
downwardly inclined edges.
The instant application is a division of co-pending ap
It is a still further object of the invention to provide an
plication Serial No. ‘198,359, ?led November 30, 1950, and 15'efficient
and resilient lock joint for the extremities of ter
now Patent No. 2,674,765.
rnite shields whereby frictional engagement is had across
Termite shields of the character with ‘which we are
here concerned are presently employed with increasing
success in the protection of wooden portions of buildings
or other structures against the destructive action of ter
mites and other wood boring insects. The necessity for
such protection is particularly great in structures having no
basement, or subterranean portion, where wooden founda
tions are in contact with or substantially close to the
ground.
Concrete or similar footings are generally employed,
in structures of this character, and for effective protection
against termites and other insects, metallic shields are
positioned either within or above these footings with the
wooden rafters, joists, and the like, supported thereabove.
For convenience of installation as well as economy of
manufacture these metallic termite shields have generally
been provided in convenient, ?xed lengths and, since the
the entire width of the shield and for a substantial area
thereof, such frictional engagement being inherent to the
method of fabrication of the locking extremities of the
shields.
It is a still further object of the present invention to
provide an efficient and resilient lock joint for the extremr
ities of termite shields which will be equally applicable for
25 use upon shields of varying surface conformation includ
ing, among others, shields having straight longitudinal
axes, shields having arcuate longitudinal axes, right-angle
shields intended for use at the corners of structures, and
T-sh-aped shields intended for use at the juncture of side
and transverse footings.
Other objects and the nature and advantages of the
invention will be apparent from the following description
taken in conjunction with the accompanying drawing,
wherein:
structure walls are of much greater extent than the con
FIG. 1 is a fragmentary perspective view, illustrating
ventional lengths of such shield-s, a plurality of shields 35 in expanded relationship the opposed extremities of ad
are appropriately assembled ‘and installed in accordance
jacent termite shield sections where one extremity of each
with the size of the structure and the length of the walls
shield
section is provided ‘with the novel lock joint of the
thereof. For effective results, such assembly requires a
instant invention;
particularly secure joint between adjacent shields and
FIG. 2, an enlarged detail sectional view illustrating
various methods have been employed to attain this end.
the extremities of the shield sections disclosed in FIG. 1
Present day practices call for 1a soldered joint, which is
particularly expensive, or for the use of resilient and
in engaged position;
frictional connecting members, the latter method adding
materially to the expense of installation, requiring the
manufacture of relatively costly connecting elements and
mite shield and joint; and
skilled labor for the assembly thereof at the site of the
construction.
The ‘majority of such connectors as are manufactured
in accordance with prior art teachings have proven unsatis
factory in actual practice, either by reason of an ineffec
tive joint or through deterioration at the joint through the
action of the elements.
A generally satisfactory termite shield comprises a me
FIG. 3, an enlarged detail sectional view somewhat sim
ilar to FIG. 2, illustrating a further modi?ed form of ter
FIG. 4, a perspective view on a somewhat reduced scale
of a termite shield section having a lock joint at but one
extremity and provided with a single downwardly in~
clined edge portion.
*
As illustrated in FIGS. 1 and 2 of the drawing, the ter
mite shield section includes a horizontally disposed central
portion 10 and inclined edge portions 11 which extend
downwardly from the horizontal, at an angle on the order
of 45°. Desirably, the width of the central portion 10 of
projects in a substantially horizontal direction a minimum 55 the shield is su?icient to extend a minimum of two inches
beyond the vertical walls of the footing of other structural
of two inches beyond each side of a Vertically disposed
element upon which the shield is intended to be mounted.
foundation wall or footing, the longitudinal edges of the
The width of each of the downwardly inclined portions 11
shield being bent downwardly at an angle on the order
is also preferably two inches, dimensions of this character
of 45° from the horizontal, the width of such bent or
tallic sheet having corrosion resistant properties and which
having proven entirely adequate and being in excess of
angularly inclined portions also being approximately two
that which may be traversed by a termite in direct flight.
inches. Thus, since each shield extends transversely in
The length of each termite section is such as to permit of
a horizontal direction and inclines downwardly at opposite
convenient handling, without undue weight, and may be
sides or edges thereof, the provision of an effective
either standardized or in accordance with the particular
locking joint at the points where angular inclination com
mence-s is inherently difficult. Moreover, since in the 65 structure. ‘If desired, but a single inclined surface 11 may
be provided, located on but one side of the shield section,
majority of instances the weight of the structure is sup
as will be discussed more fully hereinafter. However,
ported at least in part upon the horizontally disposed por
for purposes of illustration, two such surfaces have been
tions of the joints, a degree of distortion takes place,
disclosed in FIG. 1.
where separate resilient or frictional connecting elements
The extremity 12 of the shield section is of downwardly
are employed, which is adverse to the effectiveness of the 70
directed
generally S-shaped conformation, the shield sec
seal adjacent the outer or inclined portions of each joint.
tion being bent tblackwandly upon itself to provide a trans
Accordingly, it is a major ‘object of the present inven
3,089,282
3
4
verse arcuate end portion 13 and an upwardly directed
tion of the opposed extremity ‘61 of the adjacent shield
intermediate leg portion 14, the portion thus de?ned being
section.
intended for frictional engagement with the opposed ex
tremity of the adjacent shield section.
The upper extremity of the leg 14 frictionally engages
stantially ?ush bottom surface insofar as connected shield
the under surface of the shield section and the shield sec_
tion is then bent reversely upon itself to provide a trans
The arrangement thus described provides for a sub
sections are concerned, a particularly desirable feature
under certain structural conditions or circumstances.
It will be obvious that, if desired, an S-joint 52 may
verse arcuate end portion 15 and the horizontally disposed
be provided at each edge of the shield section and, Where
terminal leg 16 of the S-joint.
such joints are mirror images of each other, the lock or
Preferably the leg 16 is
disposed in substantial parallelism with respect to the 10 frictional joints described in connection with the afore
shield proper and extends beyond the arcuate end 13, the
mentioned co-pending application may be employed, and
upper surface of this leg frictionally engaging the lower
such arrangements are well within the scope of the pres
surface of the intermediate leg 14 at the point of juncture
with the transverse arcuate extremity 13. By the arrange
ent invention. However, for simplicity of installation it
has been found desirable to have a joint on but one ex
ment thus described, spaces 17 and 18 are provided above 15 tremity of each shield section, employing the method of
and below the intermediate leg 14, respectively, for a pur
frictional assembly illustrated in FIGURES 2 and 3 of
pose to be discussed more fully hereinafter.
the drawing.
One end of each shield section is provided with the S
It is also Within the scope of the invention to provide
shaped extremity described in detail hereabove, the op
termite shield sections provided with an inclined edge
posed extremity 45 remaining in the respective planes of
portion on but one longitudinal edge thereof. Such a
the central portion 10 and inclined edge portions 11.
section has been illustrated in 'FIG. 4 where the shield
With the form of shield section thus described, assem
section includes a horizontally disposed portion 62 and
bly of adjacent sections is a particularly simple matter.
The extremity 45 of one section becomes a male element
receivable frictionally within a female element formed
by the upwardly directed intermediate leg 14, the arcuate
end portion 15, and the horizontally disposed terminal leg
a single downwardly inclined edge portion 63. One ex
tremity of the shield terminates in a downwardly di
rected substantially S-shaped joint 64, similar to the
joint 12 described hereabove, and the opposite extrem
ity 65 of the shield section is intended for frictional en
16 of the S-joint of the adjacent shield section, as indi
gagement within the S-joint of the adjacent shield sec
cated at 18. Since, in manufacture, the upper surface
tion. Shield sections of this character are installed in
of the terminal leg 16 frictionally engages the lower sur 30 the conventional manner with the inclined edge gen
face of the intermediate leg 14 at the point of juncture
erally located on the side of a footing or the like removed
with the arcuate extremity 13, secure frictional engage
from any wall structure. Thus the horizontally disposed
ment of the shield extremity 45 along the entire length
edge of the sections may be received within wall struc
of the terminal leg 16 is assured and a highly effective
ture or, where necessary, angularly deformed to comply
frictional joint is thus obtained. It will be readily under 35 with speci?c structural necessity. Obviously, the forms
stood that the joint thus described is susceptible of ready
of the invention illustrated in FIGURES 1 through 4 of
assembly and secure frictional engagement between ad
the drawings may be fabricated with but a single in
jacent extremities of shield sections is insured. More
clined edge without in any manner departing from the in
over, with this form of joint, a heavier gauge of metal may
ventive concept.
be employed, if desired, than has been practicable hereto 40
It will be readily apparent that termite shield sections,
fore, since the insertion of the male extremity 45 into the
whether of standardized construction or specially fabri
S-joint 12 requires no such expansion of the female ele
cated in accordance with speci?c or unusual structural
ment as to result in any substantial distortion.
requirements, may be manufactured en masse in accord
In the modi?ed form of termite shield section illustrated
ance with the present inventive concept and may be
in FIG. 3 of the drawings, the S-joint has been disclosed 45 readily and conveniently assembled at the site of the
as offset upwardly from the plane of the shield proper so
structure, requiring neither special tools, additional ma
that the underside of the shield, intended to rest upon a
terials, or unusually skilled labor. The structure is such
footing or the like, will be substantially ?ush. This modi
that permanently effective joints are provided, insuring
?ed form of shield section includes a horizontally disposed
against deterioration at the joint per se, heretofore the
central portion 50 and downwardly inclined edge portions 50 weakest point of shields of the character with which we
51, one extremity 52 the shield section being of generally
are here concerned.
S-shaped conformation. Each shieldsection 50 is pro
It will be obvious to those skilled in the art that various
vided with an upwardly offset and outwardly angularly
changes may be made in this device without departing
inclined portion 53 extending transversely of the shield
from the spirit of the invention and therefore the inven
section adjacent one extremity thereof. The upper ex 55 tion is not limited by that which is shown in the drawing
tremity of the offset portion ‘53 merges into the upper leg
and described in the speci?cation but only as indicated
54 of the S-joint, the leg 54 being horizontally disposed
in the appended claims.
and in substantial parallelism with respect to the respec
What is claimed is:
tive planes of the central portion 50 and inclined edge
l. A termite shield section having a central horizon
portions 51. At the outer extremity of the leg 54 the 60 tally disposed portion and at least one inclined side por
shield section is bent backwardly upon itself to provide an
tion said central horizontally disposed portion extending
arcuate end 55 and an upwardly directed intermedate leg
continuously in a single plane to one extremity of the
56, similar to the arcuate extremity >13 and intermediate
shield section and providing a male element, the opposite
leg 14, respectively, previously described.
extremity of said section {being of generally S-shaped eon
Preferably the upper extremity of the leg 56 frictionally 65 formation, said extremity being bent downwardly and
engages the under surface of the shield section which is
then bent reversely upon itself to provide an arcuate end
reversely upon itself to provide a ?rst transverse arcuate
end portion and an upwardly inclined intermediate leg
portion, the upper extremity of said intermediate leg
portion frictionally engaging the under surface of said
the same plane as the central portion 50 and is thus in
70 shield section, said intermediate leg portion being bent
parallelism with both the shield section and the primary
downwardly and reversely upon itself to provide a second
leg 54 of the joint. By the arrangement thus described,
transverse arcuate end portion and a terminal leg of
spaces 59 and 64;‘, respectively, are provided above and
su?icient length to extend beyond said ?rst transverse
below the intermediate leg 56, the space 64)‘ becoming a
arcuate end portion, the upper surface of said terminal
female element intended for the secure frictional receps 75 leg frictionally engaging the lower surface of said ?rst
57 and the horizontally disposed terminal leg 58 of the
S-joint. Desirably the leg 58 is disposed in substantially
3,089,282
6
5 .
arcuate end portion, said upwardly inclined intermediate
leg portion and terminal leg together with the arcuate
end portion therebetween comprising a female element
for the frictional reception and secure retention of the
opposed extremity of an adjacent shield section, said 8
shaped extremity being upwardly offset from the plane
of the horizontally disposed central portion of said shield
beyond said ?rst transverse arcuate end portion, the
upper surface of said terminal leg frictionally engaging
the lower surface of said ?rst transverse arcuate end
portion, each upwardly inclined intermediate leg portion
and terminal leg together with the arcuate end portion
therebetween comprising a female element for the fric
tional reception and secure retention of the extremity of
the adjacent shield section when in assembled position,
each S-shaped extremity of a shield section being up~
2. A joint :for a termite shield formed from a plurality 10 wardly offset from the plane of the horizontally disposed
so that said horizontally disposed portion and said termi
nal leg portion lie in the same horizontal plane.
of shield sections, each section having a central horizon
central portion of said section a sn?icient distance so
tally disposed portion and at least one downwardly in
clined side portion said central horizontally disposed por
that the terminal leg lies in a horizontal plane indentical
to that of the central portion of said shield section, the
tion extending continuously in a single plane to one ex
male element of one section engaging within the female
tremity of the shield section and providing a male ele 15 element of the adjacent section to create a slip joint
ment, the opposite extremity of each section being up
therehetween.
wardly offset and of generally S-shaped conformation,
said extremity being bent downwardly and reversely upon
itself to provide a ?rst arcuate end portion and an up
wardly inclined intermediate leg portion, the upper ex 20
tremity of said intermediate leg portion frictionally en
gaging the under surface of said shield section, said inter
References Cited in the ?le of this patent
UNITED STATES PATENTS
upon itself to provide a second transverse arcuate end
835,818
1,091,049
2,150,891
Divver _____________ __ Nov. 13, 1906
Edwards ___________ __ Mar. 24, 1914
Tennison __________ __ Mar. 14, 1939‘
portion and a terminal leg of su?icient length to extend 25
2,674,765
Tennison ___________ _- Apr. 12, 1954
mediate leg portion being bent downwardly and reversely
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