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Патент USA US2129336

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Sept. 6, 1938-
Filed Nov. 12, 1937
/ 4.
Patented Sept. 6, 1938v
William Fred Schmidt and Thomas Joseph
Bresina, Chippewa Falls, Wis.
Application November 12, 1937, Serial No. 174,256
1 Claim.
The present invention relates to new and use
ful improvements in caissons and has for its
primary object to provide, in a manner as herein
after set forth, a caisson of novel construction to,
5 be used when excavating telephone pole or post
holes in quicksand or gravelly ground.
Another object of the invention is to provide a
caisson constructed of slidably engageable sec
tions to facilitate its placement in an excavation
10 when same in being dug.
Another object of the invention is to provide a
substantially water tight connection between the
sections to keep water from seeping into the ex
cavation from the walls thereof.
Another object of the invention is to provide a
caisson wherein the sections of the caisson may
be lowered alternately as the excavating of. the
hole progresses.
All of the foregoing and still further objects
20 and advantages of the invention will become ap
parent from a study of the following speci?ca
tion, taken in connection with the accompanying
drawing wherein like characters ‘ of reference
(0]. 61—41)
have secured thereto by rivets or other fastening
means l3 pairs of inner and outer reinforcing
straps I4 for strengthening said sections.
Handles l5, substantially in the form of loops,
are secured by bolts or other fastening means l6
to the ‘upper end portions of the sections 6 and 1
and are situated diametrically opposite one an
other when the sections 6 and l are placed to
When the device is to be used, the sections 6 10
and 1 may be secured together by the wires 9
and lowered into an excavation as a cylindrical.
body as indicated by the reference numeral 5 in
Fig. 1, or the sections may be placed together in
the excavation with the vertical marginal por 15
tions engaged with the wires 9 omitted. When
placed in the excavation without the wires 9 at
tached the sections 6 and ‘i may be lowered
alternately, or withdrawn separately. The ver
tical marginal portions of the, section ‘I fit be 20
tween the guide plates l2 in a manner to form a
substantially watertight connection thus prevent
which has been illustrated comprises a substan
ing the seepage of water into the excavation while
the same is being dug. The device may also be
used as a form when pouring concrete around the 25
base of a post or pole.
Although we have shown and described herein a
preferred embodiment of our invention, it is to
be de?nitely understood that we do not desire to
limit the application of the invention thereto, and
any change or changes may be made in the ma
terial and in the structure and arrangement of
the parts within the spirit of the invention as
tially cylindrical body which is generally indi
designate corresponding parts throughout the
several views, and wherein:
Figure 1 is a side View of my invention partly
broken away in vertical section.
Figure 2 is a top plan view.
Figure 3 is a horizontal sectional view, taken
.20 substantially on the line 3-3 of Figure 1.
Referring now to the drawing in detail, it Will
be seen that the embodiment of the invention
35 cated by the numeral 5.
The body 5 comprises
semi-cylindrical sections 6 and ‘I having apertures
s through which lengths of wire 9 are passed, the
end portions of which are twisted as at If] to draw
‘ the semicylindrical sections together to form the
40 complete cylindrical body 5.
The semicylindrical section 6 has secured
thereto, by rivets'or other securing means II, at
its vertical marginal portions pairs of guide plates
or ?anges 92 for receiving the vertical marginal
4;, portions of the semi-cylindrical section ‘I there
What is claimed is:-—
In a device of the character described, a cais
son comprising substantially cylindrical comple
mental sections having apertures therein, lengths
of wire engaged in the apertures to hold the sec--‘
tions together, pairs of inner and outer reenforc
ing straps secured to the upper end portions of
said sections, pairs of guide forming plates se
cured to the vertical marginal portions of one of
said sections for slidably receiving the corre
sponding portions of the other sections there
between in a manner to form a substantially
between, and handles secured to the top portions
water tight slidableconnection between said sec
tions 6 and ‘l.
The upper end portions of the sections 6 and 1
of said sections.
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