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Патент USA US2119318

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May 31, 1938.
‘R. L._ nAvgsoN
Filed’ may‘ 7, 1935
2 Sheets-Sh'eat 2
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Patented May 31, .1938 '
nunmme UNIT
Robert L._Davison, New York, N. Y.,_ assignor to ~
John B.'Pierce Foundation, New York, N. Y., - '
a corporation of New York .
Application May 7, 1935, Serial _No. 20,129
3 Claims.
(on. 72—68)
perspective view of an improved '
‘ My. present invention relates to prefabricated
building slab embodying my invention.
building units, and more particularly to an 'im
Fig. 2 is an elevation of my improved reinforc
proved peripherally reinforced frangible material
building slab.
In certain forms of building units, particularly
ing prior to having the building material incor- I
porated therewith.
Fig. 3 is a section on the line 2-2 of Fig. 1.
Fig. 4 is a perspective view of a portion of an
building slabs or panelssu?iciently small to ad
mit of ready handling and assembling into a-wall,
other embodiment‘ of my invention.
it is advantageous to make the same of relatively
Fig. 5 is a section on the line 57-5 of Fig. 4‘.
Fig. 6 is a vertical section on the line 6-5 of 10
10 qualities as respects surface ?nish, or capability _
of surface ?nish, as well as high soundand heat Fig. 4 and Fig. 7 is a'plan view of Fig. 6. s
‘ Referring to the drawings and particularly to
, insulating qualities generally possessed by such
Figs. 1, 2 and 3, I0 designates‘ a rectangular build"
type of material. ,Such slabs or panels, how
ever, are normally insui?ciently strong to have ing slab of a relatively light frangible material,
-15 formed as an integral part ‘thereof a peripheral such for example, as the relatively light weight
‘groove ‘extending around their edge faces for porous material, having high heat and sound in
keying in with other wall structure in a building sulating, qualities, disclosed in U. S. Letters Pat
ent No. 1,932,971, Hutteman and‘ Czernin, as
signors to FrederickO: Andere'gg, granted Octo
lnzmy resent invention I have devised an‘ im
20 proved building‘slab construction, in which the. ber 31, 1933, entitled Method of making _ light 20
peripheral edge faces of the- unit are reinforced weight blocks. As appearsin the above stated
light frangible material, because of the desirable
by a relatively rigid framework, preferably of .U. S. patent, the production of slabs of the light
strip-metal, in which is formed the necessary weight porous material includes the treatment
groove for the'reception of a key or tongue. Also,
preferably, the frame reinforce for the periph
thereof for the removal-of water and other aque
ous content which is not chemically occluded in
eral edge faces lies ?ush with such faces, and is
the calcium. hydrosilicate comprising the light
spaced apart inwardly from the edgesthereof.
weight slabs.
As- usually constructed, such slabs. Ill are rec
Such reinforce enables the slab after manufac
trim to be handled by ordinary workmen, without ' tangular in form and of any desired various sizes,
“30 serious danger of injury to the peripheral edge
faces, and provides for easily and positively tying
‘the slab with other structure in a building con
and of a thickness, the preferred thickness being I
about two inches. By reason‘ of the character of
the material ‘the edges of the slabs are subject to
chipping and ‘fracture. Within the body of the
slab l0 'ande'xtending about the peripheral edges
thereof, and preferably embedded into the body
ing'slab is effectively overcome.
My reinforce is of special advantage in combi~ > of the material,‘ Iv place a substantially rectangu
nation with building slabs and other units formed lar framework 'I I, as shown in Fig. 2 in elevation;
struction. Thus, the objection heretofore raised
against the use of a frangible material as a build
,of molded material, to afford ready removal from ' and in cross section Fig. 3.
As is noted, such rectangular framework Il
may be composed of the lateral members I2 and
I3, each .of which has formed therein, as an
ments of my reinforce serves as mechanical means integral part thereof, a relatively deep groove I4.
for stripping the composite unit from the mold ‘Such members I2, and I3 are preferably formed
*of light metal, such as metal of No. v20 gauge in
. ‘after the molding stage has ensued.
g The principal object of my invention therefore, ‘thickness, and in constructing the frame as shown
in Fig. 3 the corner portions of ‘the members I2
is an improvedreinforced building slab of frangi
‘and I3 are mitfred, as indicated by the reference
the mold substantially free from danger of chip
ping and/0r fracture. The accessibilityof the
metallic and/or other relatively more rigid» ele
Another object of my invention is an improved
combined reinforcing and groove containing ele
ment for building slabs.
Other objects and novel features of the con
.. retraction and arrangement of’ parts comprising
numeral‘ I5. ' Such corner elements I5 are pref
erably welded together to form the frame. Be
cause of the shape and position of the‘ groove ll, so.
"the resulting frame possesses high rigidity.
It is noted that the exposed faces of the mem
my improved slab will appear asthe description bers I2 and I3 coincide with the peripheral edge
I ofthe invention- progresses. .
81 Li
In the accompanying drawings,
~of the slab“! and that the overall width of the
members I2 and‘ I3 .s substantially less than the . 55
As appears from the aforesaid embodiments of
my invention, the accessibility of the metallic
and/or other relatively more rigid elements of
my reinforce enable the positioning thereat of
In associating the framework shown in Fig. 3 mechanical means for stripping the composite
with the building slab ID, the rectangular frame building unit from the mold, upon termination
is preferably placed in the mold in which the of the molding process. ,,
While I have necessarily shown and describe
slab i0 is formed to embed the frame in the
thickness of such building slab It, so that the
metal of which the members I 2 and ii! are con
structed, is not exposed to view in the com
pleted wall or partition.
slab duringthe casting of the latter.
With material of the nature of the stated cal
cium hydrosilicate, it is essential that the mois
ture to be removed from the porous solid cal
cium hydrosilicate have free paths of flow to the
major faces of the slab. Particularly, it is essen
15 tial to avoid, in the structure of the stated ree
tangular frame, the formation of pockets or traps
formed by non-permeable members between
which are contained masses of the stated calcium
hydrosil-icate or analogous materials.
When utilizing a plurality. of building slabs,
preferred embodiments of my invention some
what in detail, it is to be understood that I may
vary the size, shape and detail arrangement of
parts constituting my improved construction
without departing from the spirit of the inven
I claim:
1. A prefabricated building unit comprising a
slab of frangible material formed from ingredi
ents including water and giving rise to a molded
product, and a rigid framework embedded in the
edge faces of the slab and extending peripherally 20
aroundthe slab, said framework comprising con
such as the slab It, in the building of a wall or
partition, the grooves in the adjacent faces of the tinuously grooved strip members having groove
slabs III are brought ‘into registry with each other, de?ning extensions thereof embedded in the
and a key or tongue may be ?tted in such regis-. material of the slab, the strip proper being wholly
25 tering grooves H either with or without the use flush with the respective edge faces of the slab 25
of a ?lling agent.
In such manner a smooth
faced wall or partition may be built of the plu
rality of slabs I 0 so that such slabs III, are se
curely held in position with respect to each other.
Referring now to Figs. 4, 5, 6, and '7, there is
shown another embodiment of my invention in
which the peripheral groove containing reinforc
ing such as is shown‘ in Figs. 1, 2, and 3 are ar
ranged on but two of the opposite side edges of
35 the slab. Such two opposite side edges are pref
erably, though-not necessarily, the vertical side
and having its longitudinal edges spaced inwardly
from the major faces of the slab to provide struc
tural reinforcement‘ for the said‘frangible. slab
without pocketing masses of the said material
between elements of the said reinforcement, thus 30
permitting free access of the water of the said
material to the major surfaces of the slab.
2. A prefabricatedv building unit comprising a
slab of frangible material, a rigid framework em
bedded in the edge faces of the slab and extend 35
ing peripherally around the slab, said framework
edges of the slab while the horizontal ends have comprising oppositely related continuously
the reinforcement formed of a length of‘ angle grooved strip members having groove-de?ning
iron. In such form -of my invention, the rec ' extensions thereof embedded in the material of
40 tangular framework is formed into a unitary the slab, the strip proper being flush with its 40
‘structure by welding or in any other suitable respective edge face of the slab and having its
manner, but because of the character of the longitudinal edges spaced inwardly from the
material employed the corners are not mitred as major faces of the slab to provide means whereby
in Figs. 1, 2 and 3. -I prefer ,to have the vertically the building, unit may be keyed at such edge face
arranged groove members l2 extend throughout with other structures in a building construction, 45
the entire height of the slab l0. Therefore it is' said framework comprising, further, oppositely
advantageous to provide a groove in the angle related V-strip members having the vertex of
iron reinforcing‘ It as clearly illustrated in Figs. the V embedded in the material of the slab to the
4 and 7 to permit the grooved portion of the mem
limit of extension of its de?ning leg members, and
50 bers I! to be properly positioned. In such form reinforcing means extending through the body of
of my invention preferably the angle iron mem
the slab and secured within the depressed por
;bers l6 are of heavier construction than the ver
tion of said V-strip members.
3. A prefabricated building unit comprising a
tical groove members l2, and in such form of my
invention Iflnd it‘ desirable, under certain con- ' slab of frangible material, a rigid framework
ditions, to place the material constituting the embedded in the edge faces of the slab and ex
slab Ill under considerable compression. To this tending peripherally around the slab, said frame
end, at various locations along the width of the work comprising oppositely related continuously
slab ii are arranged vertical perforations l'l grooved strip members having groove-de?ning
through each of which may pass one or more rods extensions thereof embedded in the material of
60 It, the angle iron reinforce I‘ being drilled to the slab, the strip proper being flush with its 60
allow passage of the ends of such rods II. The respective edge face of ‘the slab and having its
ends of the respective rods I8 are threaded to longitudinal edges spaced inwardly from the‘
receive nuts I9 or equivalent, and under such nuts major faces of the slab to provide means whereby
I 9 and in the trough formed by the angle iron the building unit may be keyed at‘ such lateral
65 reinforce l6 are placed angular faced w'ashers
face with other structures in a building construc 65
20. By properly tightening the nuts I’, the rods tion, said framework comprising, further, oppo
II and the material of the slab ID are placed sitely related .V-strip members having the vertex
under any degree of compression desired. ' ‘
of the V embedded in the material of the slab to
As in the structure of Figs. 1, 2 and 3, embodi
the limit of extension of its de?ning leg members,
70 ments of my invention shown in Figs. 4, 5, 6 and 7 and reinforcing means extending through the 70
have the exposed faces of the grooved reinforce body of the slab and secured within the depressed
members l2 disposed ?ush with the facial edges portion of said V-strip members, said reinforcing
‘of the slab III, while preferably the angle iron I means being adapted for pre-stressing of the unit. '
horizontal reinforce members I‘ are at or slightly
below the facial edges, as indicated in Fig. 5.
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