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Патент USA US2127562

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Aug. 23, 193%, ,
w. A. JENNINGS
CLAMP FOR CONCRETE FORM ‘STRUCTURES
Filed June 15, 1936
Ff.
K
_ 2,127,562.
Patented Aug. 23, 1938
‘I
V.
2,127,562
:1 cFFIcE '
CLAMP FOR CQNCltETETORM’STRUGTUR-ESii '
_ :WilliamAllen Jennings, ,lje-s:,Moines:,: Iowa, as;
v
.; signorto Economy Forms'Corpoi-ation, Des
Moines, Iowa, ga'corporatio'n of'Iow'a
Application June 15, 1936, Sella
‘
'1 claim.
In the art of making concrete ‘structures with
the use of metal forms it is at the present time the
general practice to secure the metal forms‘ to
I
gether on opposite sides of the space in which the
’5 concrete is 'to be formed, ‘an'd‘then to support
these metal plates by means of structural beams
bolted or nailed together and supported in up
right positions by suitable braces, and the opera
tion of erecting these structural beams and con
10 necting them together requires a considerable
amount of labor, and if the structural beams are
made of wood the beams are damaged and
broken during repeated operations, thus causing
considerable loss of material.
15
The object of my invention is to provide a
clamp device of simple, durable and inexpensive
construction and so arranged that it may be
readily, quickly and easily hooked into the ?anged
perforated margins of adjoining mold forms, and
2 O then clamped to the horizontally arranged beams
to rigidly and securely hold said parts together,
and also the same clamps in slightly modi?ed
form may be used in a similar manner to clamp
the upright beams to the horizontal beams with
25 out the use of bolts or nails, and whereby the
structural beams may be readily, quickly and
easily removed without injury so that when
wooden structural beams are used they may ‘be
used inde?nitely without damage or deteriora
30 tion.
In the accompanying drawing Figure 1 shows
an outer face view of two adjoining metal plates
for a concrete mold structure with a horizontal
structural beam extended across them and my
"' ~<
"'
r5268.
(01. 24419)‘ f
,vevice having a .?at under surfacedesigned to
rest against" theledge of a structural beam, such,
for‘ instancqas' a'woo'den “2 'x' 4?’; This‘ body
portion’is' preferably ‘formed of'cast ‘malleable
iron and has at one end a pivot pin l I'fo'rmed‘
with a head I2 so that between the head and the
body 10 there is provided an annular groove. On
the opposite end of the body 10 there is a fulcrum
pin I 3 extended in the opposite direction from
the pin I I and having a head 14, thus forming 10
an annular groove between the head and the body
portion. This entire unit may be cast complete
in one piece and without machine work.
The lever comprises a handle portion 55 pref
erably made of cast malleable iron and having at 15
one end a substantially U-shaped slot Hi to re
ceive the fulcrum pin 13, and in practice these
parts are united by simply bending the project
ing end I‘! of the lever partly around the fulcrum
20
pin l3, as shown in Figure 4.
Formed on the lever between the handle and
the fulcrum pin is a pivot pin having a head l9,
thereby forming an annular groove between the
body of the lever and the head I9.
H
For connecting the lever and the body to the 25
articles to be clamped together I have provided
tworods 20, each having at one end a looped
portion 2| to enter the annular groove in one of
the pivot pins, each having ‘at its other end a
hook 22. Attention is directed to the fact that
the pivot pin ll extends outwardly from the body
I 0 and the fulcrum pin I3 extends in the opposite
direction and that the pivot pin I 8 extends up
wardly from the lever as shown in Figure 5. By
35 improved clamping device in position for holding this arrangement it will be seen that the two rods
the plates to the beam.
are in line with each other along about the longi
Figure 2 shows a side elevation of a metal form tudinal center of the body, as clearly shown in
plate with its perforated ?anges and a horizontal Figure 1. Furthermore, the arrangement of the
structural beam against the ?anges, with my im
construction of the lever is such that, as clearly
40 proved clamping device, shown by solid lines, in
shown in Figure 2, when the handle is at its outer
clamped position. The dotted lines show the limit of movement, as shown by dotted lines in
clamp in open position for convenient removal or said ?gure, the end of the plate adjacent the
replacement.
fulcrumecl point of the handle can be free to
Figure 3 shows a horizontal sectional view taken 2 move outwardly a short distance relative to the
45 on the line 3-3 of Figure 1.
structural beam, and, therefore, when the lever 45
Figure 4 shows a top View of a horizontal struc
is in this position both of the hook rods may be
tural beam and a vertical structural beam with quickly and readily inserted in the openings in
my improved clamping device in position for the mould form ?anges, as shown in Figure 2,
clamping them together; and
50
Figure 5 shows a detail perspective view of the
then when the handle of the lever is moved to
its downward position, as shown by solid lines in 50
several parts of my improved clamping device in - Figure 2, the pivotal point of the rod carried by
disconnected position.
Referring to the accompanying drawing I have
. used the reference numeral [0 to indicate gener
55 ally the body portion of my improved clamping
the lever passes the. dead center or fulcrum point
of the lever and, hence, when in'this position the
lever will be securely locked.
'
-
In practical use with my invention a row of 55
2,127,562
2
metal forms is placed side by side in upright
position with the perforated ?anges extended
I have demonstrated in actual practice that
a great deal of time and labor is saved by the use
Then a structural beam, such as a
of my improved clamps, and, furthermore, when
“2 x 4” is extended horizontally along the outer
faces of the ?anges. Then a clamp is placed with
its body against the outer face, of the structural
beam with the lever in its outwardly extended
position, whereupon the hooks can be readily
placed in adjacent openings of the mould form
wooden structural beams are used they may be
repeatedly re-used without injury or damage.
I claim as my invention:
ing a body having a relatively ?at surface to rest
against a structural beam, a pivot pin at one end
?anges, then the lever is moved downwardly past
of the body extended in diametrically opposite
outwardly.
dead center and the forms are then securely
clamped to the structural beam. When erecting,
this is done for each horizontal row of mould
forms, then when it is desired to provide upright
15 structural beams they are placed against the
outer edges of the horizontal beams and then
the hooks are extended around the inner faces
of the horizontal beams and the body against the
outer edge of the upright beams, when the clamp
20 ing is proceeded with in the same manner as be
fore, For this purpose the rods are made slightly
longer, as shown in Figure 4, than they are as
shown in Figure 2.
the same.
Otherwise, the structure is
A clamp for concrete form structures, compris
of the body and a fulcrum pin at the other end 10
directions, a rod pivoted at one end to the pivot
pin and having a hook at its opposite end, a lever
fulcrumed at one end to the fulcrum, a pivot
pin ?xed to the lever between its ends, and a rod 15
pivoted at one end to the pivot pin on the lever
and having a hook at its opposite end, said parts
being so shaped and proportioned that said body
may be placed on one edge of a structural beam
and the said rods extended across opposite sides 20
of said beam with the hooks engaging a member
to be supported by the beam and arranged at the
opposite edge of the beam, for the purposes
stated.
WILLIAM ALLEN JENNINGS.
25
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