Means for Making Continuous Concrete Pipes or Tiles Page: 4 of 5
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1,150,487
the other end of the core without caus-
ing a corresponding turning of the end
of the core where the swivel is located,
or a shortening of the inextensible strand
s by twisting thereof, since the swivel will
yield to any twisting force applied to
the strand 12. The spring 16 holds the
strand in a relatively taut condition, and is
unaffected by the turning of the crank since
10 it simply participates in such turning move-
ments without elongation or contraction.
The spring also tends to take up any slack
which might occur in the flexible strand 12
on the twisting of the core to reduce its ex-
15 ternal diameter, the separation of the turns
of the core facilitating the twisting action.
When the core is being withdrawn from
the finished pipe the appearance of the mark-
ing or gage metal strip 19 determines the
20 extent of withdrawal of the core, so that
there is no likelihood of entirely withdraw-
ing the core, which latter action might re-
sult in the collapse of the end of the pipe
while the reintroduction of the core will be
25 found to be difficult and might result in
more or less choking of the pipe by dislodg-
ing some of the interior thereof. In the
construction of the pipe the trench 20 may
be prepared throughout a long length before
30 any pipe is made, or it may be dug progres-
sively, the pipe produced in the trench, and
the trench filled in. Because of the flexible
nature of the core the trench may be divert-
ed to one side or the other without material
35 interference with the formation of the pipe
and the proper manipulation of the core.
Because of the limberness or pliancy of the
core, and its relative great length, it may
be quite crooked even when extended upon
40 the ground and readily conforms to any lon-
gitudinal irregularities of the trench and of
the pipe formed therein, for such irregulari-
ties are of no moment. As already indi-
cated, the cores may be made quite long and
45 in practice have been made from twelve to
sixteen feet or more in length, and may be
of any length up to that which would cause
frictional resistance too great for the with-
drawal of the core.
50 Where the finished pipe is intended for ir-
rigating purposes it is perforated at suit-
able intervals so that water introduced into
the pipe will readily find escape into the sur-
rounding earth after the pipe is made and
55 the trench is filled in, thus suitably moisten-
ing the earth and adapting it for crops. Of
course, the pipe may be built with laterals
and may be continued in any direction and
to any desired extent. Hence at a compara-
60 tively slight cost long lengths of pipe practi-
cally continuous from beginning to end may
be built directly in the ground with outlets
wherever desired permitting outflow of
water into the ground below the surface
65 thereof, and thereby thoroughly irrigatingthe ground without waste of water by evapo-
ration or otherwise.
For the production of irrigating piping or
tiling with the mold of the present invention
no special machinery is necessary, nor is it 70
necessary to employ skilled labor and no
particular care is needed in the laying of the
pipe as would occur with short lengths of
already made pipe, since in laying the latter
care must be taken with respect to the aline- 75
ment thereof.
The present application is a continuation
in part of my application No. 727,633, filed
October 24, 1912, for making continuous
concrete pipes or tiles, except that the pres- 80
ent application includes some improvements
in details of construction of the core.
What is claimed is:-
1. A core structure for the production of
concrete and like piping, comprising a me- 85
tallic ribbon with a flat molding face and
wound into an elongated helix capable of
being reduced in diameter by twisting it
about a longitudinal axis, said core being
provided with means for preventing elonga- 90
tion thereof beyond a predetermined limit,
and said core being laterally limber so as to
permit it to be bent and laid in straight or
crooked trenches.
2. A flexible core structure for the pro- 95
duction of concrete piping or tiling in
straight or crooked lines, comprising an
elongated, comparatively narrow ribbon of
resilient material with a flat molding face
and wound into a helix with the ends of the 100
core connected by an interior substantially
inextensible flexible member.
3. A core for use in connection with the
production of concrete piping or tiling com-
prising an elongated flexible helix formed of 105
a narrow strip of flat metal, and a substan-
tially non-extensible flexible strand con-
nected .at one end to the corresponding end
of the helix and extending through the lat-
ter beyond the other end thereof, said core 110
having a manipulating member connected to
the helix and to the strand and extending
beyond one end of the core.
4. A. flexible core structure adapted for
the production of concrete and like piping 11
in straight or crooked lines, comprising a
metallic ribbon with a flat face and wound
into an elongated helix having the turns
spaced in edge to edge relation, means ar-
ranged interiorly of the helix for preventing 120
elongation of the core beyond a predeter-
mined limit, and a manipulating member
connected to one end of the core for twist-
ing the latter about its longitudinal axis for
the reduction of the diameter of the core so 125
as to permit its withdrawal from the formed
pipe.
5. A core structure for the production of
concrete piping or tiling, comprising an elon-
gated comparatively narrow band wound into 1360
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Reference the current page of this Patent.
Thomas, O. Berry. Means for Making Continuous Concrete Pipes or Tiles, patent, August 17, 1915; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth858622/m1/4/: accessed July 1, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.