Occasional Electronic Publication No. 1 - Society for Industrial ...

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Part II Patent Chronology Ordered by Truss Configuration
Arch-Braced Trusses Early timber trusses were often combined with a stiffening arch. It was a common belief that the truss carried the live load and the arch the dead load. In actuality the arch and truss were intertwined; the true proportioning of loads ultimately depended on the joinery in addition to the geometry. Patent entries noted below with a # symbol are not true arch-braced trusses. They have been listed because their silhouette contains elements that may create the impression that they are arch-braced trusses. PATENT CHRONOLOGY Burr 1817: Single compression diagonal in all panels. Timber arch springs from abutments below the bottom chord. # Snyder, Jonas 1834: Pair of concentric, buttress-contained arches combined with two parallel chords and radiating verticals. No diagonals. More of a braced-arch than an arch-braced truss. Wilton 1839: Timber lattice web with evenly spaced vertical rods. Arch springs from abutments below bottom chord. Howe 1840: All-timber truss. Tension verticals. V-pattern of diagonals in each panel. Superimposed fullspan arch. Gay 1846: All timber. Curved chords. Crossed diagonals intersect the chords at different panel points than the verticals. Howe 1846: Timber except for vertical rods. Arch springs from abutments below bottom chord. Crosseddiagonals in all panels. Steele 1849: Timber arch springs from abutments below bottom chord. Arch secured only to verticals. Crossed-diagonals in all panels. # McCallum 1851: All timber. Radiating struts from abutment. Crossed diagonals in web panels extend from bottom chord to underside of arch. Pennington 1851: Upright and reversed arches. Overlapping diagonals. No verticals. Long, S. H. 1858: Inverted arch. Multitude of varied-slope web members. Eikenberry 1859: Pair of concentric arches. Multi-intersecting compression diagonals. Ham 1859: Three full-span arches brace an arched-chord truss. 71
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Occasional Electronic Publication N
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Table of Contents Foreword.........
Page 5 and 6:
Introduction: American Truss Bridge
Page 7 and 8:
make the competition profitable. Sq
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Part I Abstracts of American Truss
Page 12:
A Abbott, Job - see Hammond & Abbot
Page 15 and 16:
Beard- -Boles Beard, James 41,594 F
Page 17:
Briggs, J.- -Butterworth Briggs, Jo
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Clarke- -Coultas Clarke, Thomas & A
Page 23:
Derrom- -Duval Derrom, Andrew 48,53
Page 27 and 28: F Farnsworth, Edwin 159,084 Jan. 26
Page 30 and 31: G Gassaway, Samuel 5,297 Sep. 18, 1
Page 33 and 34: H Hagg, Lewis - see Webb & Hagg Hal
Page 35 and 36: Hendrick - -Horton Hendrick, Peter
Page 38: I Ibel, Justus 250,921 Dec. 13, 188
Page 42 and 43: K Kandeler, G.F. Theodore 343,377 J
Page 45 and 46: L Laird, John (John Laird & Co., Ca
Page 47: Long- -Lowthorp Long, Stephen (cont
Page 50 and 51: McKay- -Mitchell, H. McKay, John 90
Page 52: Moyer- -Murphy-Whipple Moyer, Abrah
Page 56 and 57: P Paisley, John 400,704 Apr. 2, 188
Page 58: Post- -Pulliam Post, Andrew (Atlant
Page 61: Ruick- -Rust Ruick, Thomas 188,678
Page 64 and 65: Sherman- -Snyder, Antes Sherman, Ev
Page 66: Stone- -Sylvester Stone, Joel 484,6
Page 69: Truesdell- -Trumbull Truesdell, Luc
Page 73 and 74: W Waddell, John A. L. - also see Wa
Page 75: White, T.- -Woodruff White, Timothy
Page 80 and 81: # McGuffie 1861: Iron bowstring wit
Page 82 and 83: PATENT CHRONOLOGY Lattice Configura
Page 84 and 85: Lattice Configurations Lucius E. Tr
Page 86 and 87: Wall 1881: Half-hip variation. No h
Page 88 and 89: Bowstring Configurations Not all bo
Page 90 and 91: Laird, J. 1869 (Patent No. 94,321):
Page 92 and 93: Bowstring Configurations - Trusses
Page 94 and 95: Howe Configurations A Howe truss is
Page 96 and 97: Howe Configurations William Howe, P
Page 98 and 99: Trusses with Multi-Panel Diagonal S
Page 100 and 101: Suspension Trusses Frederick H. Smi
Page 102 and 103: Trusses with Inclined Verticals Joh
Page 104 and 105: Lenticular Configurations James Bar
Page 106 and 107: Indefinable and One-of-a-kind Fanci
Page 108 and 109: Indefinable and One-of-a-kind Fanci
Page 110 and 111: Sellers 1873: Equalateral triangles
Page 112 and 113: Pratt Family of Trusses with Multi-
Page 114 and 115: A-Frame A sloped top chord variatio
Page 116 and 117: King-Post Configurations Arnold Rei
Page 118: Queen-Post Configurations August Bo
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