Socket support and interlock for staging panels

Claim 2

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end and having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, and (e) a second projection means provided on said second element to enter said first projection and contact and lock said detent element or elements into an operative position when said first and second elements are moved axially toward each other in said bore.

Claim 3

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end and having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, and (e) a second projection means provided on said second element to enter said first projection and contact and lock said detent element or elements into an operative position when said first and second elements are moved axially toward each other in said bore, (f) said first element having an axial bore to receive said projection means on said second element, and said detent elements being positioned adjacent said axial bore to be actuated into an operative locking position by said projection means when said elements are moved toward each other.

Claim 4

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end and having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, and (e) a second projection means provided on said second element to enter said first projection and contact and lock said detent element or elements into an operative position when said first and second elements are moved axially toward each other in said bore, (f) said first element having an axial bore to receive said projection means on said second element, and said detent elements being positioned adjacent said axial bore to be actuated into an operative locking position by said projection means when said elements are moved toward each other.

Claim 5

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, (e) a second projection means provided on said second element to enter said first projection and contact and lock said detent element or elements into an operative position when said first and second elements are moved axially toward each other in said bore, (f) said second element having a second detent means in an outer surface to engage said first detent receiving recess when said second element is shifted to said one end of said bore thereby to retain said second element in said bore at that said one end, (g) a second detent receiving recess formed in said inner surface of said cylindrical bore spaced from said first detent recess, and (h) said second detent means on said second element being positioned to register with said second detent recess when said second element is shifted to the other end of said bore.

Claim 6

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, (e) a second projection means provided on said second element to enter said first projection and contact and lock said detent element or elements into an operative position when said first and second elements are moved axially toward each other in said bore, (f) said second element having a second detent means in an outer surface to engage said first detent receiving recess when said second element is shifted to said one end of said bore thereby to retain said second element in said bore at that said one end, (g) a second detent receiving recess formed in said inner surface of said cylindrical bore spaced from said first detent recess, and (h) said second detent means on said second element being positioned to register with said second detent recess when said second element is shifted to the other end of said bore.

Claim 7

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end and having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, and (e) said second element comprising a cylindrical insert having a central bore at each end, one of said bores receiving and retaining said first projecting means and the other of said bores intersecting cross-passage in said insert to provide a recess for engagement with a retraction tool.

Claim 8

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end and having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, and (e) said second element comprising a cylindrical insert having a central bore at each end, one of said bores receiving and retaining said first projecting means and the other of said bores intersecting cross-passage in said insert to provide a recess for engagement with a retraction tool.

Claim 9

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end and having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, and (e) said second element comprising a cylindrical insert having a chordal recess in the outer wall and a detent projection formed integrally with said insert projecting radially outward of said outer wall adjacent said chordal recess and connected to said insert by a resilient neck portion.

Claim 10

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end and having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, and (e) said second element comprising a cylindrical insert having a chordal recess in the outer wall and a detent projection formed integrally with said insert projecting radially outward of said outer wall adjacent said chordal recess and connected to said insert by a resilient neck portion.

Claim 11

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end and having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, and (e) said second element comprising a cylindrical insert having an outer wall and end transverse of said wall and having formed therein a pair of axially spaced chordal recesses diametrically opposed in the outer wall between the ends of the insert and a detent projection formed integrally with said insert projecting radially outward of said outer wall adjacent each chordal recess and a resilient neck portion connecting each said detent projection with said insert.

Claim 12

In a staging system for construction of portable flat stages, choral risers and the like, which includes a load-bearing member to serve as a module having a cylindrical bore in a reinforced section of the member to receive a structural element such as a leg or rail stanchion or the like, that improvement which comprises: (a) said bore being open at each end and having an inner surface formed with a first detent receiving recess in said surface, (b) a first structural element having a first projection to be received in one end of said bore adjacent said recess to occupy a portion of the axial dimension of said bore, (c) one or more first detent elements in said first projection positioned to register with said recess when projected into an operative position in said recess, (d) a second element in said bore aligned with said first element to occupy the remainder of the axial dimension of said bore, and (e) said second element comprising a cylindrical insert having an outer wall and end transverse of said wall and having formed therein a pair of axially spaced chordal recesses diametrically opposed in the outer wall between the ends of the insert and a detent projection formed integrally with said insert projecting radially outward of said outer wall adjacent each chordal recess and a resilient neck portion connecting each said detent projection with said insert.