Improvements in Pile Cores.
Year: 1897

page_text: Date of Application, 1st Sept., 1897-Accepted, 9th Oct., 1897
Improvements in Pile Cores.
We, ALFRED AUGUSTUS RAYMOND, Contractor, and WILLIAM LYTLE Ross,
Physician, both of Omaha, in the County of Douglas and State of Nebraska,
United States of America, do hereby declare the nature of this invention, and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:
This invention has relation to a Pile Core and the method of driving the same.
The object of our invention being to provide a Pile Core to be used in place of
the ordinary wood pile for foundation for buildings as well, as piers.
In the accompanying drawings, Figure
pile core and shell.
shows a broken detached view of a
Figure 2 shows a broken enlarged view of the pile core and shell.
Figure shows a top view of our improved pile core, while
Figure 4 shows the completed pile.
The object of our invention is to provide a cheap lasting pile that shall be
adapted to withstand corrosion and not rot either in water or dry soil. In fulfilling
the object of our invention, we provide a pile core comprising two similar semi-
circular core sections, B, B, which sections are preferably circular in cross-section,
as is shown in Figure 3. At a suitable point near the lower ends, we provide
these core sections with the ears, B, B₁, adapted to receive the bars, 3, 3, which
bars are used in pairs and in turn are shackled to the core, C, preferably of metal
and looking from the edges like a series of superposed truncated cones as is shown
in the figure. The core sections, 'B, B, are of less than half a diameter, the
missing space being occupied by the core, C, as is disclosed in Figures 2 and 3.
The edges where this core section join the core, C, are stepped or notched to
correspond with the outline of the core, C, as shown in Figure 2. The pile can
be of any suitable shape.
Secured to the core, C, is a head, D, which head is provided with suitable
openings adapted to receive the guide bars, 5, 5; by means of which the core is
guided and which guides form part of any ordinary construction adapted to guide
the pile core while being driven. The head, D, is of metal and is provided with the
opening 6, within which the core, C, as well as the sections, B, B, are held
the core, C, however, being provided with a threaded head, 7, screwing into the
head, D, while the Pile sections work loosely within the opening, 6. Above we
provide a head, 8, of wood or other suitable material to act as a buffer in receiving
the shock of the pile drive necessary to drive the core.
In its normal position, the pile sections, B, B, would be forced outward the
length of the bars, 3, 3, secured to the solid core, as shown in Figure 1. To keep
the core sections, B, B, from expanding. beyond a certain point while working
downward, we provide the bars, 3, 3, below, which work upon a bolt, 1, within an
opening, 2, of the core, while above the cores work within the head, D, and -so
cannot spread. As soon as the core, C, is carried upwards by means of the head, D,
the sections, B, B, would be drawn inward by means of the bars, 3, 3, in which
position the core would be of a decreased diameter as is shown in Figure 2, so that
the core could be easily removed.

page_text: The method of using our device and of driving piling according to our invention
is to provide a thin metal shell, K, which shell can be of sheet metal, paper or other
material, from a thirty-secondth to any increase thickness desired. This shell
need not be water tight and could be provided with perforations and simply forms
a light temporary coating to the pile while the same is being driven. The core, C,
is driven as usual, with one of these shells surrounding it, a desired depth, when
the pile core can be promptly withdrawn as the core expands while being driven
downward and contracts in being carried backward. In Figure 2 we have shown
the relative position of the core section, B, and the shell, K, and showing the
core section still in position, but the core drawn up a short distance.
After the core is withdrawn there is of course, left within the earth, the thin
metal shell which is next filled by a composition of cement and crushed stone a,
or any other suitable filling. This filling can be tamped into the shell to make
it good and solid and be built up above the ground. In time the shell of course,
rots away especially if the piling is driven below the water line, but this cuts no
figure as the earth around the piling will have been securely packed while the
pile which is preferably made of cement will withstand corrosion.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. In an expanding pile core the combination with a main serrated center core,
of a head secured to said core and two core sections shackled to said main core
and provided with a serrated edge meshing with said main core, said core section
working within said head, all substantially as and for the purpose set forth.
2. An expanding pile core comprising the main central section, C, having two
serrated sides, a, a, the cars B, BI, the two core sections B, B, shackled to said
core section, C, by means of the bars, 3, 3, the head, D), secured to said main
section, C, provided with the opening, 6, adapted to movably hold the upper ends
of said core sections, B, B, in combination with shell, K, all substantially as and
for the purpose set forth.
3. The method of preparing a pile which consists in driving a core into the
earth, said core being covered with a temporary shell, then removing said core
and filling said shell with a solid filling such as cement, all substantially as and
for the purpose set forth.
4. The method of driving a pile, which consists in providing a temporary pile
covering with a solid core, then driving said temporary shell into position, then
removing said solid core and finally providing the said shell with a suitable
filler, all substantially as and for the purpose set forth.
Dated this 1st day of September 1897