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Патент USA US2407059

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Sept- 3, 1946-
-
H. H. GRAFTON
_v 2,407,059
PORTABLE LAUNCHING AND LANDING MAT FOR AIRPLANES
Filed Sept. 29, 1943
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Sept. ?3, 1946.
H. H. GRAFTON
2,407,059
PORTABLE LAUNCHiNG AND LANDING MAT FOR AIRPLANES
Filgd Sept. 29, 1945 .
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4 Sheets-?Sheet 2
Sept 3, 1946-
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H. H. CRAFTON'
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2,407,059
PORTABLE LAUNCHING AND LANDING MAT vFOR AIRPLANES
Filed Sept. 29, 1943
4 Sheets-Sheet 3
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Sept- 3, 1946-
H. H. GRAFTON
2,407,059
PORTABLE LAUNCHING AND LANDING MAT VFOR vAIRPLANES
'
>Fil?ed Sept. 29, 1943
4 ?Sheets-Sheet 4
2,407,059
3
4
extending downwardly. The lower ends of the
the units In on either side two courses of units _
side walls may be bent inwardly as shown to form
shelves 44 upon which the web portions 35 may
be received. The top plates 6'! may be welded or
otherwise attached to the cellular metal units
to form integral mat sections.
The cellular metal units l2, as shown in Fig.
3, each comprise a corrugated sheet metal mem
l2 are provided, and, as illustrated in Fig. 9, in
order to connect the units It) to the units l2 in
abutting relationship to form a flush upper sur
face, each unit I0 is provided with an angle mem
ber 84 welded thereto and forming a shelf upon
which one end of the member I2 may rest.
'
In order to lock adjacent units l0 and I2 to
ber 56 provided with a top plate 58 having de
gether, adjacent members I!) vary in length to ob
pending side wall portions 56. The units 12 are 10 tain a staggered end formation, the members 52
further provided with transverse bottom straps
being locked between alternate members it by
� joining the bottom webs of the corrugations
locking clips M, as best shown in Fig. 1. The
at spaced intervals alOng the length of the unit.
next course of units l2 are similarly locked in
The top plates 58 and bottom straps 62 may and
staggered formation, the outer course of units l2
preferably will be Welded to the corrugated metal 15 varying in length and being assembled end to end
members 56 to form integral mat sections.
with the adjacent course and locked between
Provision is made for quickly and conveniently
alternate units i2 of the second or intermediate
joining adjacent units it? or 12 to form the body
course.
As illustrated in Figs. 10 and 11 an apron i8 is
portion of the landing mat, and, as best shown in
Figs. 2 to '7, the locking member i4 is arranged 20 provided at each end of the mat or strip which
to be inserted in openings 46 formed by cutouts
is made up in sections of convenient length, as
shown in Fig. 1. Each apron section is provided
48 in adjacent members In, as shown in Fig. 2, or,
with a vertical wall 86 provided with suitable cut
in openings 66 formed by cutouts 64 in adjacent
out portions to form with the adjacent cellular
members l2, as shown in Fig. 3. The openings 46,
66 expose the side walls 42, 60 of adjacent units 25 metal units openings into which the locking
members M are inserted to securely attach the
in and I2 respectively and the locking clips M are
aprons thereto. The aprons I8 are preferably of
provided with parallel arms 50 arranged to em
a height equal to the mat units It and where used
brace the adjacent side walls, the arms 50 being
adjacent the units � a portion of the apron may
formed integrally with and extended from a tie
piece 52. As shown in Figs. 4 to 6, the length of 30 be buried in the ground, as shown in Fig. 11.
Provision is made for .running cables 20 trans
the clip I4 is substantially greater than the length
versely of the mat and as illustrated in Fig. 12
of the opening; and, the depth of the cutout is
a plurality of auxiliary sections 24 of inverted
su?icient to permit the tie piece 52 to be set
U-shape may be provided to form channels 22 in
below the upper surface of the top plate 40 or 5B
or to be substantially ?ush therewith.
35 which wooden inserts 90 may be placed as shown.
A wooden plank 92 may also be provided under
The ?rst step in applying the locking member
the cable sections 24, the planks being set below
I 4 in operative position, as illustrated in Fig. 4, is
the ground line, as shown. The cable sections 24
to insert the member at an angular position, the
are of the same height as the adjacent cellular
arms 50 embracing the side walls 60. The look
units l0 between which they run and to which
ing clip is then moved to the left, viewing Fig. 4,
they are attached by the locking clips M. Fig. 13
in order to project the arms 59 under the adjacent
illustrates cable sections 26 arranged to form con
portion of the top plate and permitting the op
tinuations of cable sections 24 and being of a
posite end of the clip to drop down into the open
height so as to provide a flush surface with the
ing as shown in Fig. 5. The locking clip is then
forced to the right, viewing Fig. 6, to engage a - adjacent cellular metal units l2. A wooden in
sert 96 is provided within the section 26 and a
wedging surface 54 of the locking clip with the
grooved plank 98 may be set under each section
under side of the opening in order to lock the clip
beneath the ground line, as shown.
in position.
The cable sections are disposed approximately
Referring now to Figs. 1 and 8, the catapulting
track indicated generally at I6 is supported in an 50 through the center of the mat and parallel to
the runway sections �to which they may be
auxiliary member comprising a top plate 10 hav
attached by the locking clips I ll. As illustrated in
ing a depressed portion 12 to which the track
Fig. 14, where the cable passes under the track
members 13, 15 are attached, and depending side
section I 6 a length of pipe I00 is provided
wall portions 14. The top plate 10 is provided
which may be welded to the bottom plate 18 and
with angle members 16 welded thereto and an
which is provided with bushings H32 threaded
elongated bottom plate 78 is welded to the ends
into either end of the pipe. Openings llld in the
of the angle members 16 as clearly shown in Fig.
upper ends of the cable sections, as shown in
8. As shown in Fig. 1, the track section extends
Fig. 1, may be provided for an arresting cable
at right angles to the cellular metal units 10 and
support, not shown.
in order to tie the ends of the units l 0 to the track
The cellular metal units may be made of any
section similar cutouts are provided in abutting
convenient size, in practice being approximately
portions of the track section and the cellular units
one foot wide and varying in length from nine to
to form an opening for receiving a locking clip M
twelve feet to provide the staggered formation.
to embrace the side walls 14 and depending end
walls 80 forming part of the units [0. As shown . Thus, each section may be conveniently handled
by one or two men to enable the mat to be set up
in Fig. 8, the lower member 32 of the unit H) ex
in operative position in a minimum of time.
tends beyond the upper member 30 to rest on the
After the individual units have been laid down
sides of the bottom plate 18, and upright lugs 82
formed by bending up portions along the edge of
and locked together in the manner above de
the plate 18 are arranged to be received in open
scribed, it will be observed that a structurally
ings formed in the bottom of the members 32.
united mat is formed having sufficient strength
From the description thus far it will be ob
to withstand the impact of planes landing thereon
served that the catapulting track section I 6 run
and in addition the integrated structure is such
ning through the center of the mat is connected
as to distribute the stresses set up during cata
to a course of units ID on either side. Beyond 75 pulting of planes when taking off. The cellular
2,407,059
5
structure of the individual units and the manner
in which they are locked ?together, enables the
individual units to be constructed light in weight
faces, detachable means engageable with adja
cent side walls and with the under side of said
upper surfaces to lock said. units together, a track
supporting unit having depending side walls and
extending longitudinally of the mat between two
up.
?
courses of said cellular units, the latter being dis
While the preferred embodiment of the inven
posed at right?angles to said track unit, and de
tion has been herein illustrated and described it
tachable means engageable with the depending
will be understood that the invention may be em
side walls of said track unit and the end walls
bodied in other forms within the scope of the fol 10 of said cellular units to?lock the same together.
lowing claims.
5. An aircraft launching and landing mat com
Having thus described the invention, what is
prising a plurality of individual cellular metal
but of substantial strength and to enable the mat
to be quickly laid down and subsequently taken
claimed is:
1. An aircraft launching and landing mat com
units laid side by side with their upper surfaces
in substantially one plane and provided with side
prising a plurality of individual cellular metal 15 walls depending from their upper surfaces, one
units laid side by side in contiguous relation with
or more cable ducts extending transversely of
their upper surfaces in substantially one plane
the mat and parallel to said cellular units and
and provided with marginal side walls depending
disposed between adjacent units, said cable ducts
from their upper surfaces, the adjacent upright
having their upper surfaces in substantially the
walls of the end cells of contiguous units being
same plane as said cellular units and provided
spaced from the marginal edges to form a channel
with side walls depending from their upper sur
into which said side walls depend, said units being
faces, and means for detachably connecting said.
provided. with cutout portions at selected spaced
units and said ducts comprising a plurality of
intervas arranged to form aligned openings ex
clamping members arranged to embrace the side
posing said channel and the side walls of contigu 25 walls of adjacent units and to engage the under
ous units, and a plurality of detachable clamping
side of said upper surfaces to lock the same to
gether.
members arranged to extend into said channel
through said opening and to engage said side
6. An aircraft launching and landing mat com
walls to prevent lateral displacement of one ?unit
prising a plurality of courses, each course com
relative toanother, said clamping members hav
prising a plurality of individual cellular metal
ing portions engageable with the under side of
units laid side by side, a track supporting plate
said upper surfaces to prevent vertical displace
extending longitudinally of the mat and between
ment of one unit relative to another.
two courses of said cellular units, at least one cable
2. An aircraft launching and landing mat com~
duct extending transversely of the mat parallel
prising a plurality of individual cellular metal 35 to said cellular units and disposed between two
units laid side by side in contiguous relation with
of said units, all of said members having their
their upper surfaces in substantially one plane
upper surfaces in substantially one plane and
and provided with marginal side walls depending
provided with walls depending from their upper
from their upper surfaces, the adjacent upright
surfaces, and means for detachably connecting
walls of the end cells of contiguous units being
said members comprising a plurality of locking
spaced from the marginal
to form a channel?
into which said side walls depend, said units
being provided with cutout portions at selected
spaced intervals arranged to form aligned open
ings exposing said channel and the side walls of
contiguous units, and a plurality of detachable
clamping members arranged to extend into said
channel through said opening and to engage said
side walls to lock said units together, said clamp
?31g members being of greater length than said 50
opening and arranged to extend under the upper
surfaces of the units to prevent vertical displace
clips arranged to embrace ?no side walls of adja
cent members and to engage the under side of
said upper surfaces to lock the same together.
7. An aircraft launching and landing mat com
prising a plurality of individual cellular metal
units laid side by side and detachably secured
together, each of said cellular metal units in
cluding an upper and a lower corrugated sheet
metal member joined together at their web por
tions to form hollow load supporting sections,
and an elongated plate extending across and se
cured to the top of the corrugated sections to
form an integral mat section, said plate being
provided with downwardly extended side walls
having their lower ends bent inwardly and in
engagement with the underside of the exterior
web portions.
side walls depending from their upper surfaces,
8. An aircraft launching and landing mat,
said units being provided with cutout portions at
comprising: a plurality of individual cellular
selected spaced intervals arranged to form aligned 60 metal units having ?at upper surfaces and side
openings exposing the side Walls of contiguous
walls depending from said upper surfaces, said
units, and a plurality of detachable clamping
units being arranged so that said, side walls are
members adapted to be inserted through said
in adjacent, side by side relationship; and a plu
openings and arranged to engage said side walls
rality of clamp members engaging said adjacent
to lock said units together, portions of said clamp 65
side walls at spaced intervals, each of said
ing members being wedge shaped and arranged
clamping members including an inverted U
to extend under the upper surfaces of adjacent
shaped portion engaging said side walls to pre
units and to be wedged between the latter and
vent lateral displacement of one of said units
portions of said side walls.
4. An aircraft launching and landing mat com~ 70 with respect to another, and parts engaging the
under side of the flat upper surfaces, the loop of
prising a plurality of courses each course com
said U-shaped portion extending through said
prising a plurality of individual cellular metal
adjacent depending side walls so as to cooperate
units laid side by side with their upper surfaces
in substantially one plane and provided with side
with said parts engaging the under side of the
and end walls depending from their upper sur 75 flat upper surfaces and prevent vertical dis
ment of one unit relative to another.
3. An aircraft launching and landing mat com~
prising a plurality of individual, cellular metal
units laid side by side with their upper surfaces
in substantially one plane and provided with
2,407,059
7
8
placement of one unit with respect to an ?ad
jacent unit in both directions.
9. An aircraft launching and landing mat,
comprising: a plurality of courses in substantially
parallel relationship, each of said courses com
prising individual cellular metal units having
porting sections; and a plurality of clamp mem
bers engaging said adjacent side Walls at spaced
intervals, each of said clamping members in
?at upper surfaces and side walls depending from
said upper surfaces, said units being arranged
in transverse alignment so that said side walls
are in adjacent side by side relationship; a plu
cluding an inverted U-shaped portion engaging
said side walls to?prevent lateral displacement
of one of said units with respect to another, and
parts engaging the under side of the flat upper
surfaces, the loop of said U-shaped portion ex
tending through said adjacent depending side
side walls at spaced intervals, each of said clamp
ing members including an inverted U-shaped
walls so as to cooperate with said parts engaging
the under side of the flat upper surfaces and
prevent vertical displacement of one unit with
respect to an adjacent unit in both directions.
portion engaging said side walls to prevent
13. An aircraft launching and landing mat,
rality of clamp members engaging said adjacent
lateral displacement of one of said units with 15 comprising: a plurality of individual cellular
respect to another, and parts engaging the un
metal units having ?at upper surfaces and side
der side of the ?at upper surfaces, the loop of
walls depending from said upper surfaces, said
said U-"shaped portion extending through said
units being arranged so that said side walls are
adjacent depending side walls so as to cooper
in adjacent, side by side relationship, each of
ate with said parts engaging the under side of
said cellular metal units including a corrugated
the flat upper surfaces and prevent vertical dis
sheet metal member secured to said upper sur
placement of one unit with respect to an ad
faces, and a plurality of transversely extended
jacent unit in both directions; and a track sup
straps secured at spaced intervals to the bottom
porting unit extending between two of said
of said corrugated member; and a plurality of
courses for substantially the entire length 25 clamp members engaging said adjacent side walls
thereof.
at spaced intervals, each of said clamping mem
10. An aircraft launching and landing mat,
bers including an inverted U-shaped portion en
comprising: a plurality of courses in substan
gaging said side walls to prevent lateral displace
tially parallel relationship, said courses com
ment of one of said units with respect to another,
prising individual metal units having flat upper
and parts engaging the under side of the flat up
surfaces and side walls depending from said up
per surfaces, the loop of said U-shaped portion
per surfaces, said metal units arranged in trans
extending through said adjacent depending side
verse alignment with said walls in adjacent side
walls so as to cooperate with said parts engaging
by side relationship forming substantially paral
the under side of the ?at upper surfaces and pre
lel rows with the adjacent ends of the units of
vent vertical displacement of one unit with re
any given row staggered with respect to the ends
spect to an adjacent unit in both directions.
of the units of the rows adjacent thereto; and
14. An aircraft launching and landing mat,
clamp members engaging said adjacent side walls
comprising, a plurality of courses in substantially
at spaced intervals, each of said clamping mem
parallel relationship, said courses comprising a
bers including an inverted U-shaped portion en 40 plurality of individual cellular units having ?at
gaging said side walls to prevent lateral dis
upper surfaces and side walls depending from
placement of one of said units with respect to
said upper surfaces, said units being arranged
another, and parts engaging the under side of
so that said side walls are in adjacent, side by
the ?at upper surfaces, the loop of said U-shaped
side relationship, the said cellular metal units
portion extending through said adjacent depend- ? of at least one of said courses including upper
ing side walls so as to cooperate with said parts
and lower corrugated sheet metal members
engaging the under side of the flat upper sur
joined together at their web portions ta form
faces and prevent vertical displacement of one
hollow load supporting sections, and said cellular
unit with respect to an adjacent unit in both
metal units of other of said courses, including
directions, and to lock together said courses to '
a single corrugated sheet metal member; and
form an integral structure.
a plurality of clamp members engaging said ad
11. An aircraft launching and landing mat, ac
jacent side walls at spaced intervals, each of said
cording to claim 8, including a sloping ground
clamping members including an inverted U
engaging apron secured to at least one of the
shaped portion engaging said side walls to pre
ends thereof.
vent lateral displacement of one of said units
12. An aircraft launching and landing mat,
with respect to another, and parts engaging the
under side of the ?at upper surfaces, the loop
of said U-shaped portion extending through said
adjacent depending side walls so as to cooperate
units being arranged so that said walls are in 60 with said parts engaging the under side of the
adjacent, side by side relationship, each of said
flat upper surfaces and prevent vertical displace
cellular metal units including upper and lower
ment of one unit with respect to an adjacent unit
corrugated sheet metal members joined together
in both directions.
_
at their web portions to form hollow load sup
HENRY H. GRAFTON.
comprising: a plurality of individual cellular
metal units having ?at upper surfaces and side
walls depending from said upper surfaces, said
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