Articulated concrete column form with novel corner fastening device

Claim 2

In a concrete form of the type that comprises a series of upstanding rectangular panels two of which are in contiguous relationship, extend at a right angle to each other and have along their adjacent side edges outwardly extending flange-like members which extend at a right angle to each other and have transverse slots therein at substantially the same level, the improvement which comprises a fastening device adapted releasably to retain the two panels in their normal position of contiguity and comprising a first T-bolt embodying a plate-like body portion at one end thereof and a reduced longitudinally slotted shank at its other end, and having its body portion disposed in the space between the two flange-like members and abutting against one of said flange-like members and its shank portion extending through and beyond the transverse slot in said one flange-like member, an elongated second T-bolt embodying a body portion at one end thereof and a reduced longitudinally slotted shank portion at its other end, having its body portion slidably connected to the body portion of the first T-bolt so that it is slidable transversely thereon, and adapted when so slid in a direction normal to the other flange-like member to have its shank portion extend through the slot in said other flange-like member, and wedge pieces projecting through the longitudinally extending slots in the shank portions of the two T-bolts and serving when driven into place to draw the body portions of said T-bolts hard against their respective flange-like members.

Claim 3

In a concrete form, the improvement set forth in claim 1 and wherein the plate-like body portion of the first T-bolt is provided with an offset portion which lies in the general plane of the body portion of the second T-bolt and establishes guide means for preventing relative turning movement between the two T-bolts.

Claim 4

In an articulated concrete form, a series of substantially identical vertically disposed panels arranged in quadrilateral relationship so as to define therebetween an enclosed rectangular void into which wet concrete may be poured to produce a vertical column, each panel being comprised of a rectangular facing bounded by a marginal reinforcing frame incluDing opposed vertical frame members and opposed horizontal frame members which project laterally from the general plane of the panel facing in the same direction, thus defining a shallow tray-like structure, each of said vertical frame members being formed with a row of vertical spaced apart horizontally elongated slots therein, an angle bar fixedly secured to the vertical frame members of adjacent panels at each of one pair of diagonally opposed corners of the rectangular void and serving to maintain such adjacent panels in their right angular relationship and positions of contiguity, means hingedly connecting together the contiguous vertical frame members of adjacent panels at a third corner of the void, thus defining rigid and angular column form sections which are capable of swinging movement bodily toward and away from each other between a normal closed column-confining quadrilateral condition and an open position of column release, a third angle bar having flanges fitting adjacent vertical frame members at said fourth corner of the void, said flanges being formed with slots which register with the slots in such adjacent vertical frame members, and a removable unitary fastening device for securing said third angle bar to said adjacent vertical frame members, said fastening device including a first T-bolt having a body portion and a reduced narrow tongue-like shank portion removably projecting through a pair of registering slots in one flange of the third angle bar and the adjacent vertical frame members, a second T-bolt slidable on said first T-bolt in and transversely of said tongue-like shank portion and also having a body portion and a shank portion removably projecting through a pair of registering slots in the other flange of the third angle bar and the adjacent vertical frame members, said tongue-like shank portions extending at a right angle to each other, wedge pieces removably projecting through the slots in said shank portions and serving to draw the body portions of the respective T-bolts hard against their associated angle bar flanges, and coacting guide means on said T-bolts for preventing relative turning movement therebetween.

Claim 5

In an articulated concrete form, a series of substantially identical vertically disposed panels arranged in quadrilateral relationship so as to define therebetween an enclosed rectangular void into which wet concrete may be poured to produce a vertical column, each panel being comprised of a rectangular facing bounded by a marginal reinforcing frame incluDing opposed vertical frame members and opposed horizontal frame members which project laterally from the general plane of the panel facing in the same direction, thus defining a shallow tray-like structure, each of said vertical frame members being formed with a row of vertical spaced apart horizontally elongated slots therein, an angle bar fixedly secured to the vertical frame members of adjacent panels at each of one pair of diagonally opposed corners of the rectangular void and serving to maintain such adjacent panels in their right angular relationship and positions of contiguity, means hingedly connecting together the contiguous vertical frame members of adjacent panels at a third corner of the void, thus defining rigid and angular column form sections which are capable of swinging movement bodily toward and away from each other between a normal closed column-confining quadrilateral condition and an open position of column release, a third angle bar having flanges fitting adjacent vertical frame members at said fourth corner of the void, said flanges being formed with slots which register with the slots in such adjacent vertical frame members, and a removable unitary fastening device for securing said third angle bar to said adjacent vertical frame members, said fastening device including a first T-bolt having a body portion and a reduced narrow tongue-like shank portion removably projecting through a pair of registering slots in one flange of the third angle bar and the adjacent vertical frame members, a second T-bolt slidable on said first T-bolt in and transversely of said tongue-like shank portion and also having a body portion and a shank portion removably projecting through a pair of registering slots in the other flange of the third angle bar and the adjacent vertical frame members, said tongue-like shank portions extending at a right angle to each other, wedge pieces removably projecting through the slots in said shank portions and serving to draw the body portions of the respective T-bolts hard against their associated angle bar flanges, and coacting guide means on said T-bolts for preventing relative turning movement therebetween.

Claim 6

An articulated concrete column form as set forth in claim 1 and wherein said second T-bolt underlies the first T-bolt and is provided with a longitudinal slot in the body portion thereof, and a headed stud projects through said slot in the body portion of the second T-bolt and is anchored to the body portion of the first T-bolt.

Claim 7

An articulated concrete column form as set forth in claim 4 and wherein the body portion of the first T-bolt is formed with an offset section which lies in the general plane of the second T-bolt and establishes said guide means for preventing relative turning movement between the T-bolts.

Claim 8

An articulated concrete column form as set forth in claim 5 and wherein the end of the body portion of the second T-bolt that is remote from the shank portion of said second T-bolt is provided with a downturned striking flange.

Claim 9

In an articulated concrete column form, a series of vertically disposed panels arranged in quadrilateral relationship so as to define therebetween an enclosed rectangular void into which wet concrete may be poured to produce a vertical column, each panel being comprised of a rectangular facing bounded by a marginal frame including opposed vertical frame members and opposed horizontal frame members which project laterally from the general plane of the plywood facing in the same direction, thus defining a shallow tray-like structure, means fixedly securing together the contiguous vertical frame members of adjacent panels at each of one pair of diagonally opposed corners of the rectangular void, means hingedly connecting together the contiguous vertical frame members of adjacent panels at a third corner of the void, thus defining two rigid and angular column form sections which are capable of swinging movement toward and away from each other between a normal Closed column-confining quadrilateral condition and an open position of column release, one of the vertical frame members at the fourth corner of the void and at a region diagonally disposed with respect to said hingedly connecting means in the form of an anglepiece having a first attachment flange which lies in the general plane of the facing of the associated panel and a second flange which extends at a right angle to such facing, said first flange being provided with a series of vertically spaced slots which register with corresponding slots in the adjacent vertical frame members, a plate-like body fixedly secured to said second flange of the anglepiece and positioned approximately at the level of one of the slots in said first flange of the anglepiece, an elongated T-bolt embodying a body portion at one end and a reduced longitudinally slotted shank at its other end and having its body portion provided with a longitudinal slot, a headed stud on said body and projecting through said longitudinal slot thus forming a sliding connection between the T-bolt and plate-like body, and a wedge projecting through the slot in the shank portion of the T-bolt and serving when driven into place to draw the body portion of the T-bolt hard against said first flange to thus clamp said latter flange to the adjacent vertical frame member at the fourth corner of the void.

Claim 10

In an articulated concrete column form, a series of vertically disposed panels arranged in quadrilateral relationship so as to define therebetween an enclosed rectangular void into which wet concrete may be poured to produce a vertical column, each panel being comprised of a rectangular facing bounded by a marginal frame including opposed vertical frame members and opposed horizontal frame members which project laterally from the general plane of the plywood facing in the same direction, thus defining a shallow tray-like structure, means fixedly securing together the contiguous vertical frame members of adjacent panels at each of one pair of diagonally opposed corners of the rectangular void, means hingedly connecting together the contiguous vertical frame members of adjacent panels at a third corner of the void, thus defining two rigid and angular column form sections which are capable of swinging movement toward and away from each other between a normal Closed column-confining quadrilateral condition and an open position of column release, one of the vertical frame members at the fourth corner of the void and at a region diagonally disposed with respect to said hingedly connecting means in the form of an anglepiece having a first attachment flange which lies in the general plane of the facing of the associated panel and a second flange which extends at a right angle to such facing, said first flange being provided with a series of vertically spaced slots which register with corresponding slots in the adjacent vertical frame members, a plate-like body fixedly secured to said second flange of the anglepiece and positioned approximately at the level of one of the slots in said first flange of the anglepiece, an elongated T-bolt embodying a body portion at one end and a reduced longitudinally slotted shank at its other end and having its body portion provided with a longitudinal slot, a headed stud on said body and projecting through said longitudinal slot thus forming a sliding connection between the T-bolt and plate-like body, and a wedge projecting through the slot in the shank portion of the T-bolt and serving when driven into place to draw the body portion of the T-bolt hard against said first flange to thus clamp said latter flange to the adjacent vertical frame member at the fourth corner of the void.

Claim 11

An articulated concrete column form as set forth in claim 7 and wherein the end of the body portion of the T-bolt remote from the shank portion thereof is provided with a downturned striking flange.