Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Curvilinear or peaked truss
Patent
1978-09-11
1980-09-23
Bell, J. Karl
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Curvilinear or peaked truss
52 86, 52167, 52223R, E04B 132
Patent
active
042235065
ABSTRACT:
A framework in particular an arch comprising at least one frame member and wherein the framework extends in at least two dimensions, a linkage system associated with the framework and attached thereto at at least three non-collinear positions on the framework, said linkage system embodying two tension members, one of which extends from each of the two outer positions of said three non-collinear positions to the central position thereof where the tension members are each attached to one of two spaced points on a swivel member which is at least swivelable in the plane of the framework and is attached to the framework at the said central position by a connection operable in use, to allow at least limited rotation about a point offset from the line of the tension members and thereby ensure that a change in tension in one of said tension members results in a rotation of the swivel member which causes a change in tension in the other tension member.
REFERENCES:
patent: 1360931 (1920-11-01), Graves
patent: 1480882 (1924-01-01), Davidson
patent: 2567958 (1951-09-01), Mummert
patent: 2614512 (1952-10-01), Gross
patent: 2653553 (1953-09-01), Jacobs
patent: 2704522 (1955-03-01), Frieder et al.
patent: 3362117 (1968-01-01), Van Raden
patent: 3418768 (1968-12-01), Cardan
patent: 3849953 (1974-11-01), Cohen
patent: 4021875 (1977-05-01), Abell et al.
Blair John T.
Gleeson Maurice J.
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