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Патент USA US3071845

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Jan. 8,1963
H. P.CERUTTI
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3,071,837
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CONCRETE FORMS
Filed Oct. 2. 1959
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HENRY PETE? CEPUrr/
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INVENTOR
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_ Jan. 8, 1963
H. P. CERUTT]
3,071,837
CONCRETE FORMS
Filed Oct. 2, 1959
4 Sheets-Sheet 2
INVENTOR
AKA/P)’ P572‘? CEPUI'H
Jan. 8, 1963
H. P. CERUTTI
3,071,837
CONCRETE FORMS
Filed 001'.- 2, 1959
_
4 Sheets-Sheet 3
INVENTOR
HEM?!’ PETE? C'EQl/ff/ 4
1% W glmmq?ulé
1.
Jan. 8, 1963
H. P. CERUTTI
3,071,837
CONCRETE FORMS
Filed Oct. 2, _1959
4 Sheets-Sheet 4
| NVE N TOR
HiA/P)’ PETE? cziez/rr/
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United States Patent 0
1
3,071,837v
Patented Jan. 8, 1963
2
FIGURE 7 is a view in side elevation of a compound
3,071,837
truss embodiment of this invention, in mounted working
CONCRETE FORMS
position;
Henry Peter Cerutti, Mount Lebanon Township, Alle
gheny County, Pa., assignor to Blaw-Knox Company,
FIGURE 8 is a detail view in side elevation of the
panel face pivot in the embodiment shown in FIGURE 7;
Pittsburgh, Pa., a corporation of Delaware
Filed Oct. 2, 1959, Ser. No. 844,101
8 Claims. (Cl. 25—131)
FIGURE 9 is a rear view of the detail shown in FIG
URE 8;
.
FIGURE 10 is a detail view of a spinner jack truss
This invention relates to concrete forms of the kind
member shown in the FIGURE 7 embodiment to operate
used for massive construction such as dams and founda 10 the upper panel section;
tious. More particularly, this invention relates to self
FIGURE 11 is a view in side elevation of a compound
supporting reusable forms of relatively great strength
truss embodiment for a flexible form face construction,
which are adjustable in character and relatively easily
in mounted working position;
installed and removed.
FIGURE 12 is a detail view of a portion of the em
In the construction of concrete dams, spillways and 15 bodiment shown in FIGURE 11 adjacent the lower end
retaining walls, foundations and other massive structures
made of concrete, the variety of ?nish face conditions,
angles and slopes required to conform to design speci?ca
tions, are legion. Heretofore, such variations in physical
of the panel face;
FIGURE 13 is a view in section taken along line
XIX-XIX of FIGURE 12;
FIGURE 14 is a plan view of the upper platform with
conformation often have required a great number of sep
arate forms tailored to the particular surface condition
to be satis?ed. Moreover, many such prior forms were
the scaffold boards removed taken along line XIV-XIV
unduly cumbersome and di?‘icult to position in place and
embodiment of this invention in mounted working posi
remove after the concrete molded by the form had set.
tion to mold a bulkhead wall surface;
FIGURE 16 is a rear view of the embodiment shown
of FIGURE 11;
_
FIGURE 15 is a view in side elevation of a beam form
In order to keep such forms capable of being readily 25
handled, the height of the lift of concrete which could be
in FIGURE 15;
poured with them was limited. In many cases, too, the
FIGURE 17 is a detail view of the upper end of the
placement of the forms subjected them to damage from
pivoted tail of the embodiment shown in FIGURElS
operations in the vicinity by the charging bucket, crane
taken along line XVII-XVII of FIGURE 18;
30
equipment or other nearby work.
FIGURE 18 is a detail view of the rear of the detail
In the new form constructions of this invention, de
shown in FIGURE 17;
?ciencies of prior practices have been overcome. Thus,
FIGURE 19 is a view taken along line XIX-——XIX of
my concrete forms are relatively strong and utilize simple
FIGURE 17;
or compound trusses whereby the forms can be handled
FIGURE 20 is a view taken along line XX~XX of
without dif?culty and yet are so strong that high lifts 35 FIGURE 17; and
of concrete may be poured safely against them. Further,
FIGURES 21 and 22 are two views in plan of a
the new forms are adjustable to the conformation of the
special chamfered end section to enable two adjoining
face or surface to be poured. They are self-supporting
panels to be connected optionally in alignment or at right
and are readily anchored in place on overhung, vertical
angles.
or sloping walls for the next increase in height of the con 40
Referring to FIGURES 1 to 6 of the drawings, a tri
‘crete mass to be poured; with provision therein during
angular truss form 10 of this invention is shown in
such pouring for disconnection and higher relocation
mounted self-supporting position on a previously cast
when the newly poured lift has set sufficiently. Pivotal
block 11 of a concrete dam or other cast mass, ready
portions of the new forms enable them to accommodate
for the pouring of a next higher lift the top of which will
surface “kinks” and bends and changes in slope. In 45 reach to the dot-and-dash line marked with the numeral
addition, such new forms facilitate pouring and in the
12. Form 10 is self-supported on a surface which may
case of close work, such as proximity to a concrete charg
be the upstream surface, for example, of a dam and com~
ing bucket, the form may be made to inhibit likelihood
prises a strongback member having a panel backing beam
of being struck or damaged during the working of other
13 and a tail beam 14 pivotally joined by a pivot pin
50
nearby equipment. Means are also provided in this in
15. The beams 13 and14 are generally vertical and in
vention for ease of adjusting and locating my new forms
vertical alignment with one another. Beam 13 is rigidly
for the varied conditions of use .to which they are re
connected to a panel comprising vertically spaced hori
spectively applicable.
zontally extended channels 16 to which a panel face 17
Other objects, advantages and features of this invention
is secured. Panel face 17 is usually either in the form
55
will be. apparent from the following description and the
of sheet metal or Wood. Horizontal bevel angles 18
accompanying drawings, which are illustrative only, in
may be secured at the top and bottom of face 17 to assist
which:
in sealing the lower edge of the lift 12 to be cast and to
FIGURE 1 is a view in side elevation of a simple truss
provide rustic‘ation of the block joints. End strips 19
form of this invention, in mounted working position;
60 may cover the ends of channel 16 at each end of the
FIGURE 2 is a rear view of the embodiment shown in
FIGURE 1;
‘ channel and are provided with bolt holes'20 therethrough
7
for rigid connection to any adjoining form 10a by bolts
FIGURE 3 is an enlarged detail view of the pivot area
adjacent the bottom of the panel face of the form shown
in FIGURE 1;
_
FIGURE 4 is a rear view of the detail shown in FIG
URE 3;
‘ FIGURE 5 is an enlarged detail view of a template
21 when more than one such form is to vbe used end-to
end as shown in FIGURE 2, thereby making up a com
65
posite form of any length desired. Lifting lugs 22 are
» fastened to the top of the strongback members and pro
; vided with holes 23 to enable the forms to be lifted by
cranes or otherwise for installation, relocation, or removal
keeper for the positioning of an anchor adjacent the top
as the case may be.
\
of the form shown in FIGURE 1;
Each of the‘ beams comprises a pair ‘of horizontally
70
FIGURE _6 is a view taken along line VI-VI of FIG
spaced back-to-back channels respectively denominated
URE 5;
'
13a and 14a. An upper platform 24 may be provided
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3
4
and comprises scaffold boards resting on channel joists
On the other hand, when form 10 is in position to be con
nected to block 11, for example, those anchor bolts 37
have the inner end thereof pushed through the holes 50,
which accommodate some vertical movement, until the
25 ?xed to the channels 13a. Angle posts 26 fastened
to channels 25 and rails 27 fastened to posts 26 complete
the upper platform and enable a workman to take care
of the placement of an upper anchor 28. A template
keeper 29 is fastened to the rear of each of the beams
13 adjacent platform 24 and has a pivotal latch 36' with
female screw at the inner end of the bolt 37 engages the
male screw at the outer end and of anchor 28a in block
11, respectively. Then when each bolt 37 is turned, form
It) will be secured to the block 11 until the casting of block
portion of keeper 29. A template bolt 33 is provided
12 is complete. Subsequently, the bolts 37 are loosened
with peripheral recesses 34 and a squared end 35. The 10 and removed after form 10 has been reconnected for
inner end of bolt 33 is provided with a female screw for
lifting to a crane by the lugs 22. Angles 52 may be bolted
a male screw at the outer end of anchor 28. The loca
to the lowermost channel 16 above each anchor bolt 37
tion of anchor 28 inwardly of face 17 can be preselected
and notched along the lower edge in registry with the re
by the engagement of notch 31 and the selected one of
spective bolts 37 to rest thereon as close to the concrete
the grooves 34, as shown by the full line and chain line
surface as possible. The angles 52 thereby assist in help
positions of bolt 33 in vFIGURE 6, a hole being provided
ing to support the form 10 with minimal de?ection of the
in face 17 for the passage thereof therethrough. Guide
bolts.
angle 36 is also mounted on the adjoining channel 16
The channels of standard 38 may be utilized as the
and provided with a supporting guide opening there
joists of a lower platform 53 for scaffold ?ooring. Posts
through as shown. After the block 12 has set, latch 30 20 54 are ?xed to standards 38 to support crossrails 55 and
a notch 31 therein above a bolt notch 32 in the stationary
is lifted and a wrench applied to end 35 to unscrew bolt
33 from the now ?xed anchor 28 so that the template
end chains 56 to safeguard a workman or workmen there
on. The perpendicularity of the respective trusses rela
tive to the panel 17 may be assisted, if desired, by the
bolt 33 can be removed, leaving the threaded end of
anchor 28 available for engagement by a she-bolt 37 in
use of a longitudinally extending bracing angle v57 rigidly
the manner shown in FIGURES l and 3, or by other 25 ?xed to the respective standards 38 and by a diagonal
means.
bracing angle 58 connected at one end to the outer por
Each of the channels 14a has a standard channel 38a
tion of one standard 38 and at the other end of the inner
welded thereto in back-to-back relation adjacent pivot
portion of the other standard 38.
15, the channels 38a together forming a truss standard
The embodiment 10' illustrated in FIGURES 7 to 10,
38. A lower compression member 39 of ?xed length is 30 inclusive, is of particular reliability and adaptability when
fastened between the outer end of standard 38 and
the lower end of beam 14.
used on sloping surfaces such as that which may occur
on the downstream side of a dam having monolithic cast
Such lower compression
member 39 may be a box in cross section extending into
the space between the respective standard channels 38a
blocks 59 and 60 supporting form 10' for the casting of
a next higher block 61. Parts corresponding generally
at one end and the tail beam channels 1411 at the other
' in construction and functioning to parts disclosed in
end. A bearing block 40 is fastened to the front of the
lower end of beam 14. An upper compression member
41 is pivotally connected between a trunnion bearing 42
?xed to the back of beam 13 and a second trunnion bear
ing 43 ?xed to the outer end of standard 38, respectively.
Compression member 41 may be in the form of a “steam
boat” ratchet or turnbuckle so that rotation of sleeve 44
in one direction or the other will correspondingly shorten
‘FIGURES 1 to 6, inclusive, are provided with the same
reference numerals with the addition of a prime accent
thereto, respectively. In the modi?ed embodiment, the
greater length of face due to the greater slope has been
provided for by the use of a compound truss, by the
a?ixation of the form 10’ by two anchors 28a’ one above
pivot pin 15’ and the other adjacent the lower end of
tail beam 14’ and by the provision of an articulated panel
therein. The compound truss employs additional truss
members 62, 63 and 64. Member 62 may be generally
or lengthen member 41 between its pivotally connected
ends and correspondingly affect the position in space of
panel face 17 about pivot pin 15 relative to the position 45 parallel to the lower portion of panel beam 13’, is in regis
of tail beam 14 for ready adjustment of face 17 to its
try therewith ‘and is rigidly connected between ‘standard
reselected position for the desired angle of the ?nish
38’ and a joist beam 63. Ioist 63 is rigidly secured be
surface on block 12, or other block which is to be cast
tween beam 13’ and member 62 and also serves to sup
against face 17.
port scaffold boards 63c and railing members 63a and 63b
As shown in FIGURES 3 and 4, the pivotal connec 50 for an upper platform adjacent the upper anchor 28a’
tion between beams 13 and 14 forming the strongback
and anchor bolt 37' . Member 64 is pivotally connected
may be provided with the assistance of plates 45 respec
at 65 between the channels 14a’ and pivotally connected
tively welded to the inside of the channels ‘14a and ex
at 66 by a pin passing through registering "holes at the
tending upwardly into the space between the channels
lower end of spaced channel member 62 and a hole 67 in
13a to which last-named channels they are not af?xed. 55
member 64.
Plates 45 are provided with vertically spaced horizontal
ly registering pairs of holes 46, one pair of which is to be
brought into alignment with a pair of holes 47 in re
enforcement plates 48 fastened to the web of channels
13a, the holes 47 extending through such webs so that
pivot pin 15 may be inserted across the space between
the channels 13a and through the selected pairs of holes
A series of adjustment holes 67 through member 64
enable tail beam 14' to be swung about pivot 15’ to the
desired extent. Thus, when form 10' is utilized in an
area such as the bucket of a dam or when tail beam 14'
has to bridge akink, it may be bent out to an intermediate
extent as indicated by the chain lines 14'A. On the
other hand, when form 10' is to be used for surfaces not
46 and 47 to pivotally connect the beams 13 and 14.
requiring de?ection of the tail beam, pivot 15’ may be
Cotter pins at the ends of the pin 15 or other means
may be used to insure against accidental dislodgement of 65 omitted and the lower portion of the strongback beams
13’ and 14’ made one straight rigid beam construction.
the pivot pin 15.
An angle 49 is ?xed in the joint between standard 38'
and tail beam 14 and spans the respective channels there
of. Each angle 49 is provided with an upper elongated
hole ‘50 and a lower hole ‘51 in registry with the space be 70
tween such channels respectively. As a consequence,
while form 10 is suspended by a crane or from ‘another
As shown, the hinge connection for pivoting about pin
15’ is constructed substantially in the manner shown in
FIGURES 3 and 4.
When tail beam 14’ is bent at an
angle to the lower portion of beam 13’, another opening
67 on member 64 is utilized to preserve the rigid con
nection between the members of the compound truss.
The bearing pad 40’ in the form ‘10' is rotatably ?xed
support before it is relocated, the respective anchor bolts
37 may be carried safely by having them hang down
to a bolt 68 which threada'oly engages a nut held between
through the holes 51 as shown in chain line in FIGURE 3. 75 the channels 14a’ so that 40' may be brought into ?rm
8,071,837
5
6
bearing engagement with the surface already cast and
provide self-support in conjunction with the two tightened
further modi?cation.
Thus, the upper portion of the
beams 13” are provided with a ?exible sheet metal panel
‘face 83, while the lower portion of the beams 13" are
adjustably connected to a ?exible lower panel face por
tion 84 which tightly meet when closed at horizontal line
77". As shown in detail in FIGURES 12 and 13, a nut 85
is connected by trunnion pins to each of the beam chan
bolts 37'. Joists 69 of a lower platform 53’ extend rear
wardly from between the respective channels 14a’ of
beams 14’ and are pivotally connected at 70 to plates 71
at the lower ends of those beams. The plates 71 are
provided with longitudinally spaced openings 72 for con
trol of the angle of scaffold 53’ relative to the beam 14’
since the connecting bolt through the selected hole 72
on each side will be applied in whatever position main
nels so as to span the space between such channels and
engage adjusting screws 86 the upper ends of which are
provided with wrench heads 87, the screws 86 at the
upper end of panel section 83 and at the lower end of
tains platform 51' most comfortable for a workman under
the prevailing conditions of operation.
panel section 84 being longer because of the greater length
The beams 13’ and the panel 17' are each divided hori
zontally into an upper portion and a lower portion,
of adjustment required at such respective ends for cer
tain selected curvatures. The lower thread on each ad
which are hinged together by pivot pins 73. The lower 15 justing screw 86 engages a trunnion nut 88 held by a
end of the upper panel 16’—117' is ?xed to horizontally
bracket 89 fastened to the respective parallel lengthwise
spaced downwardly extending ears 75 which ?t to each
stiffeners 91 which are of T-shaped cross section except
side of an upwardly extending ear 76 rigidly connected
that they are angles at the very top and bottom of the
to the upper end of the lower panel 16'-—17'. All of the
panel where the adjusting screws 86- are longer. The
ears are provided with laterally registering holes ‘for the 20 sti?eners are welded respectively to the inside of the re
passage therethrough of the connecting hinge pins 73.
spective panel face or skin. Diaphragm plates 90 are
The upper and lower portions of beams 13' are discontin
secured between the ?ange of the angle stiffeners 9‘1 and
uous at the hinge point to provide clearance for the fold
the inside of the panels 83 and 84 as shown in detail in
ing back of the upper panel section. When the two panel
FIGURES 12 and 13. Consequently, whatever the set
face portions are in registry, the edges of those face por 25 ting of the spinner jack member 41", the curvature of the
tions meet tightly along a horizontal line 77. On the
panel face portions 83 and 84 may be selected by the in
other hand, ‘when member '41’ is shortened, the upper
dividual adjustment of the adjusting screws 86 operatively
panel portion may be moved to form a bend with the
‘connected to each thereof. Normally such adjustment of
lower panel section 17’ to mold' a “kink” or correspond
the curvature of 83 and 84, which may be of thin sheet
ing bend in the ?nished surface of the block being cast. 30 steel, is made to conform to a template before the form
Further, if the upper panel section is vmoved to a posi
10" is lifted into place for attachment prior to the pour
tion X indicated in chain line, the pouring of monolith '
ing operation which it is to control. The plan view of
61 is greatly facilitated since the charging bucket can
scaffold 630” which is shown-in FIGURE 14 illustrates
come down and readily discharge its contents so as to ?ll
cross bracing between the joists 63" in the form of mem
the acute angle corner between the block 60 and face 17' 35 bers ‘92 and 93, like the bracing provided by members 57
of the lower panel portion. As the level of the block
and 58 in the embodiment of FIGURES 1 and 2.
being cast mounts, and before it reaches division line 77,
A connector plate 94 is welded to each end of each of
member 41' is quickly lengthened returning the upper
the stiffeners 91 in alignment with the end of the form
panel portion face 17’ to its molding position as shown in
10", the plates 94 being provided with holes 95 extend
full line in FIGURES 7 and 8.
.
Member 41' as shown in detail in 'FIGURE 10 is a
spinner-type jack screw construction having ‘a collared
wrench head 78a which cooperates with an open-ended
hood 81 to stop movement of head 78a in an inward di
rection.
40
ing therethrough for bolt connection to registering holes
in the adjoining end connector members of an adjoining
form. The inner edges of the respective plates 94 par
allel to the inside of the panel faces 83 and 84 are spaced
therefrom so that such faces may be curved by the ad
The head of screw member 41' is relatively 45 justment of the respective screws 86 without binding
freely movable in and through hood 81 away from panel
against such plates 94.
17 ’ when a wedge 79 is not inserted through a slot 80 to
A beam girder embodiment 100 is illustrated in FIG
bear against the top 41’a of the outer telescoping sleeve 4 URES 15 to 20, inclusive, and is particularly suitable for
of the screw. With the wedge disengaged, the upper
use in molding or ?nishing bulkheads, training walls and
panel section 17’ can be rapidly pushed into its closed 50 other vertical reaches. Therein a strongback beam 101
full—line position shown in FIGURE 7 as the concrete
of built-up box-type construction is provided having a
rises in block 61, close to the division line 77, following
pivoted lower end 102 in the form of a rocker beam. The
which the wedge is inserted and any ?nal adjustment of
upper back side 103 and the lower back side 104 of the
the length made by turning head 78a with an impact or
strongback are tapered so that if hit by a charging bucket
other wrench. As the concrete presses against the upper 55 or other moving equipment, such equipment will be de
section of panel 17’, it cannot swing that section open be—
?ected or glance off to a greater extent than would other
cause of the wedge in the slot 80 holding member 41’
wise be the case. Each of the two strongbacks is secured
in place. In the lifting of form 10’ for the next pour, one
to cross channels 105, like the channels 16, to which a
sling is used to engage lug 22' and another sling is used
panel face 106 is secured.
to engage a hole 82 in a plate adjacent the inner end of 60
The lower end 102 is pivotally connected on each side
member 41’ to provide a relatively balanced position lift
by pivot pins 108 to the sides of the lower open end of
ing during the relocation thereof.
‘the remaining portion of the strongback. The upper por
A further modi?cation illustrated in FIGURES 11 to
tion of part 102 isv tapered at 109 as shown in FIGURE
14, inclusive, provides a ?exible panel face which may be
17. A nut 110 is welded to the upper end of part 102
adjusted to a selected curvature, in conformity with a 65 to engage a screw 111 held by a bracket 112 so that it
template, for correspondingly shaped 'portions of a dam
- or other monolith construction with which the fort 10"
is to be used.
In such further modi?cation, the com
can rotate but not move axially.
Hence, as screw 111 is
rotated by turning its wrench head 113, the angle which
the lower end 102 makes with the balance of strongback
101, varies to press a bearing pad 114 ?xed to end 102
ments are‘substantially the same as those shown in the 70 against an already cast monolith 115 after form 110 has
modi?ed embodiment and the description thereof there
been fastened thereto by engagement of anchor bolt 116
fore will notbe repeated.‘ Reference will be made to such
and a threaded anchor 1-17 in the monolith. A support
corresponding portions indicated by the use of the same
angle 1-18, or a wood block, if desired, extends between
reference numerals but with, a double prime accent for
the lowermost channel 105 in the panel and the outside
convenience in describing further novel features in the 75 of bolt 116 for additional stability and support.
pound truss, platforms, beams and’ securing arrange
3,071,837
As shown, bolt 116 extends through an opening in
bracket 112 through which it cannot pass because of a
collar 119. A peripheral groove 120 is provided on the
exterior of bolt 116 for engagement by a recess at the
lower end of a slide 121 when form 100 is being moved
to a new location.
A bayonet slot 139 engages a knob
140 on slide 121 to enable it to be held up or to slide
down so that the notch at the bottom of slide 121 will
engage the groove 120 as and when desired. A retainer
8
corner, the ?xture 150 is positioned as shown in FIGURE
22 and bolts 164 are used to pass through appropriate
registering holes in the panels to connect them together
at right angles.
The construction forms of my invention are versatile
and materially enlarge the ?eld of use thereof. Further,
they ‘are strong and are exceptionally rigid and resistant
to de?ection under load. At the same time, they are
maneuverable and relatively light, being transportable,
pin 122 inwardly of groove 120 prevents bolt 116 from 10 connectible and disconnectible with comparative ease and
safety. Various changes may be made in features of the
falling or coming wholly out of bracket 112. Access to
illustrated embodiments and other embodiments provided
the outer ends of bolt 116 and screw 111 are provided by
without departing from the spirit of my invention or the
an opening 123 in the back side of the strongback.
scope of the appended claims.
The back side of strongback 101 is provided also with
an opening 124 in which there is a latch-type template 15
bolt keeper 125 similar in construction and functioning
I claim:
1. A concrete form comprising, in combination, a panel
to that shown in FIGURE 5 to enable a template bolt
having a panel face, a plurality of parallel strongbacks
126 and anchor 127 to be properly positioned in the
monolith to be cast. Lifting lugs 128 with holes therein
having pivotally connected tail portions depending below
connected to the back of said panel, said strongbacks
are provided at the upper ends of the respective beams 20 said panel, a triangular section truss connected to each
strongback in perpendicular relation to said panel, each
101 and are secured thereto. In addition, the top of the
truss having a diagonal member adjustable in operative
length to a substantial extent to selectively adjust the angle
of said tail portions to the remainder of said strongbacks
folded-up position. The platforms are supported by
rearwardly extending joists 133 pivotally connected at 25 respectively, said member being pivotally connected at one
end portion to said tail portion outwardly spaced there
their forward ends to the sides of the respective girders
panel is provided with retainer lugs 129 with holes 130
therein to retain platforms 131 and 132 when they are in
101 and at their rearward ends to posts 134 which rise
far enough to comprise railings having cross rails 135
from and the other end portion to said panel, means for
positioning prospective anchoring means in projecting
position extending through the upper portion of said panel,
and end chains 136. Stops 137 and 138 act to hold the
joists 133 horizontal when the platforms are down, but 30 and means below said panel for anchoring said form in
position.
when the platforms are up, they rise together because of
2. A concrete form as set forth in claim 1, in which
the parallelogram linkage described. Bolts 107 are used
said tail portions of said strongbacks are hinged adjacent
with lugs 129 to hold them in up position and out of
the lower end of said panel, said last-named means in
the way of any nearby work. The boards used on the
platforms are discontinuous across the space occupied 35 clude anchor bolts projecting forwardly of the face of said
panel adjacent the bottom of said panel, and there is a
by the respective beams 101.
In the construction of bulkheads, training walls and
piers, it often happens that an inside corner has to be
poured, preferably with a ?llet or ?at chamfer. A ?xé
ture 150 illustrated in FIGURES 21 and 22 provides
for the formation of such chamfered inside corners with
out having to make up or bring in a special concrete
form. The ?xture 150 comprises a base portion 151
welded along its underside to the end 152 of a panel
support positioned for engagement with the bottom of said
panel and said anchor bolts in vertical alignment with
said panel to inhibit de?ection of said bolts.
3‘. A concrete form as set forth in claim 1, in which
each said truss comprises a standard ?xed to said tail por
tion and extending rearwardly therefrom, a strut member
extending from the outer end of said standard to the lower
end of said tail portion, an adjustable member extending
form 153, preferably foreshortened to the extent of the 45 from the outer end of said standard to said strongback
above said tail portion, said adjustable member being
thickness of ?xture 150. A nut 154 is welded to the
pivotally connected at its respective ends to said standard
underside of base 151 in alignment with a hole 155
spaced from said strongback and to said panel, and cross
therethrough and through a rotatable top 156 in the ?x
bracing means extending between each of said trusses.
ture. Bolts 157 tightly connect the two parts of the
4. A concrete form as set forth in claim 1, having a
?xture together and to form 153 in either position of use, 50
template bolt keeper comprising a notch to support a
both of which are shown respectively in FIGURES 21
template bolt having a plurality of longitudinally spaced
and 22. When bolts 157 are removed the top part 156
positioning grooves, 21. swingable latch having a notch
can be rotated to the other selected position of use before
therein adapted to engage a selected groove in said tem
the bolts 157 are retightened. The two parts of ?xture
.150 extend for the full height of the end or ends of the 55 plate bolt, the centers of said notches being substantially
coincident, and said panel having an opening therethrough
panel with which they are used.
in longitudinal registry with said notches.
The base part 151 is provided with a square edge 158
5. A concrete form as set forth in claim 1, in which
and a chamfered edge '159, the inner portion of which
said strongback and tail portions extend in spaced align
chamfered edge is ?ush with the face of the form to
which it is connected. The top 156 is provided with a 60 ment, connector means are ?xed to one of said portions
and extend alongside the other of said portions, said con
charnfered portion 160 flush with portion 159 when top
nector means have a plurality of openings therethrough
156 is in the position shown in ‘FIGURE 22. The other
spaced in the direction said portions extend and hori
end of top 160 is square and in alignment with the rear
zontal axis hinge means to engage a selected one of said
of panel 153 in the position of FIGURE 22. The under
side of the square portion of the top 156 carries a toe 65 openings and said other of said portions to hinge said
portions together in a selected spacing.
161 which when swung over to a straight line pouring
6. A concrete form comprising, in combination, a panel
position illustrated in FIGURE 21 squares off the cham
having an upper section and a lower section hinged to
fered portion 159 of base 151. The consequence is that
gether about a horizontal axis, a truss having members
by means of ?xture 150 a regular form 162 may be bolted
in end-to-end straight-line arrangement to panel 153 70 ?xed to the lower section in perpendicular relation there
to, said truss having a further diagonal adjustable length
without any gap therebetween, the ?xture being in the
position shown in FIGURE 21. Bolts 163 secure the
member extending to said upper section from the nearer
of said ?rst-named members to regulate the angle between
panels together, holes for the passage thereof existing
through both parts of the ?xture 150. Conversely, when
‘said sections in correspondence with the length of said
a right angle is to be made for the pouring of an inside
adjustable length member, a strongback secured to the
3,071,837
back of at least said lower section in the plane of said
truss, said strongback having a lower tail portion pivotally
connected thereto, and anchor means below and closely
adjacent said lower section for anchoring said strongback
and form.
5
7. A concrete form as set forth in claim 6, in which
said adjustable length member of said truss is a fast
acting spinner-type screw jack, said truss further having a
hood through which the outer end of said screw jack
passes in relatively loose axial and angular relation, and 10
means to hold said spinner-type screw jack immovable
relative to said hood.
8. A concrete form comprising, in combination, a panel
having a face, a ?xture adjustably secured to an end of
said panel, said ?xture having a pair of relatively rotatable 15
parts, each of said parts having a chamfered face and a
square end, one of said parts having a toe extending
alongside the other of said parts, said parts forming a
right angle chamfer when said chamfered faces are ?ush
10
for a right angle connection to a second panel, said part
with said toe further forming a straight face with the face
of said ?rst-named panel when said toe is positioned in
juxtaposition to the chamfered face of said other of said
parts.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,562,403
Ahart _______________ __ July 31, 1951
2,574,274
McMullan ____________ __ Nov. 6, 1951
2,649,643
Schutte _____________ __ Aug. 25, 1953
2,669,000
2,725,210
2,825,956
2,857,647
Seemann _____________ __ Feb. 16,
Swartz ______________ __ Nov. 29,
Shoemaker ___________ __ Mar. 11,
Williams ____________ __ Oct. 28,
1,164,919
France ______________ __ May 19, 1958
1954
1955
1958
1958
FOREIGN PATENTS
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