Clamp Page: 2 of 3
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UNITED STATES PATENT OFFICE.
WILLIAM D. FERGUSON, OF SAN ANTONIO, TEXAS.
CLAMP.Specification of Letters Patent.
Patented Feb. 24, 1920.
Application filed March 22, 1919. Serial No. 284.238.
To all whom it may concern:
lie it known that I, WILLIAM D. FERGU-
SoN, a citizen of the United States, residing
at San Antonio, in the county of Bexar and
5 State of Texas, have invented a new and use-
ful Clamp, of which the following is a
specification.
This invention relates to clamps for use
in concrete building construction and has
10 for its object the provision of a clamp that
will retain the form for concrete work in
shape until the concrete has set, or hardened,
and which may then be easily and quickly
removed.
15 Another object is to provide a device that
may be used repeatedly on one job after an-
other and that renders unnecessary, any
frame work, or bracing such as was hereto-
fore used to hold the side walls of the form
20 in place.
With these and other objects in view as
will appear, as the description proceeds, the
invention resides in the novel features
shown in the drawing and more particularly
25 pointed out in the appended claim.
In the drawing:
Figure 1 is a view in cross section of a
form with the invention applied thereto;
Fig. 2 is a perspective view of the clamp.
30 Referring to the drawing by characters of
reference the numerals 1 and 2 represent the
opposite side walls and 3 the bottom of a
form commonly used in the building of con-
crete structures.
35 It has heretofore been the practice to
build quite an expensive frame work to sup-
port the form for concrete work, much of the
lumber of which Was useless afterward, with
uy invention this loss is eliminated and
40 much of the workmen's time is saved in set-
ting up the forms.
The device consists of a bar 4 rectangular
in cross section and of a length adaptable to
forms of various widths. Secured to the
45 bar intermediate its ends and at right angles
thereto, is an angle iron standard 5, a brace
member 6 is riveted to the bar 4 near one
end thereof and extends diagonally to en-
gage the standard near the top thereof where
60 it is riveted to one of the sides of the angle
member.
The standard is provided with openings in
the side adjacent the form for the reception
of nails or other fastening devices, for hold-ing the boards of the form in place, until 55
the concrete is poured.
Slidably mounted on the bar is an abut-
ment 7 for .engaging that side of the form
opposite the one engaged by the standard 5.
The abutment 7 is provided with a rectangu- 60
lar opening 8, which is adapted to approxi-
mately fit the bar 4, the opening being
slightly longer than the corresponding cross
sectional dimension of the bar, thereby per-
mitting a slight tilting of the abutment on 65
the bar, to cause the abutment to grip the
bar; this being an old and well known means
of engagement, further description is deemed
unnecessary.
The abutment is provided at the upper 70
end thereof with an inwardly bent end 9,
presenting a face 10 to engage the form, well
up the side wall thereof; the relatively long
arm and small bearing face of the abutment
renders the adjustment of the clamp to the 75
form comparatively easy when the abutment
is forced forward on the bar, which is done
by driving the abutment on the bar.
A rivet or pin 11 on the bar 4 prevents the
complete removal of the abutment from the 80
bar. The few parts constituting the device
form a substantial structure that is well
adapted for the rough usage to which a de-
vice of this character is subjected, and al-
though primarily intended for use in con- 85
crete work, other uses for the device will
present themselves.
Having thus described my invention what
is claimed is:
A clamp for a concrete form, comprising 90
a base bar of rectangular cross section; a
standard in the form of an angle member.
one flange of which is secured to one side of
the base bar, the other flange of which out-
stands from said side of the base bar and is 95
provided with openings facilitating the at-
tachment of the clamp to one side of a form:
an inclined brace having its ends attached
respectively to the first specified flange of
the standard and to the base bar; and an 100
abutment having an opening receiving the
base bar slidably and conforming in shape
to the cross section of the base bar, the abut-
ment being tiltable to grip the bar, the abut-
ment having an inwardly extended end, and 105
being of less height than the standard,
whereby the inwardly extended end will en-
gage the opposite side of the form, thereby1,331,491.
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Ferguson, William D. Clamp, patent, February 24, 1920; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1256846/m1/2/: accessed June 3, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.