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

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Paisley, John
400,704 Apr. 2, 1889 Metal Howe truss. Two-panel configuration. Tubular horizontal and
diagonal members. Verticals are metal rods.
Palmer, Charles
176,991 May 2, 1876 *Tied arch. Timber upper chord. Cable bottom chord and cables inside
two-part timber posts. No diagonals in panels. Similar in appearance to
a queen-post truss.
Palmer, Timothy
Not assigned Dec. 17, 1797 Timber, three-span continuous truss. Radiating verticals extend from
three-arched bottom chords between piers to slightly arched top chord.
Compression diagonals in each panel.
Palmer, Winfield
501,534 Jul. 18, 1893 *Parallel girders. Labeled “bridge.”
Parker, Charles (National Bridge & Iron Works, Boston, Mass.)
93,638 Aug. 10, 1869 Combination of a bowstring truss for moving loads, and a cantilevered
suspension truss for dead loads.
98,620 Jan. 4, 1870 *Suspension bridge.
100,185 Feb. 22, 1870 Pratt truss configuration. Slightly curved top chord. Slope of inclined
ends can vary to adjust bridge length.
103,233 May 17, 1870 *Suspension drawbridge.
Parker, William
394,877 Dec. 18, 1888 *Deck supported by diagonal metal rods from top of a row of piles.
Labeled “truss bridge.”
Partridge, Reuben
127,791 Jun. 11, 1872 Timber double-intersection Warren truss configuration. Web ties set at
60 degrees, struts at 45 degrees.
Patterson, John & Andrew Sprague
146,400 Jan. 13, 1874 Howe truss configuration. Inclined end posts. Crossed diagonals in all
panels. Improvement in connections.
Peale, Charles
Not assigned ca. 1796 *Trussed timber arch. Patent drawing published in his “An Essay on
Wooden Bridges” (1796).
Pegram, George
314,261 Mar. 24, 1885 Pratt truss configuration. Polygonal upper chord. Top-chord segments
are of equal lengths, resulting in verticals that have an increasing tilt
from truss center-span to the abutment ends.
314,262 Mar. 24, 1885 Additional variations on his patent no. 314,261
409,700 Apr. 27, 1889 *Swing drawbridge. Labeled “bridge.”
424,349 Mar. 25, 1890 Continuous-cantilever double-intersection Pratt truss configurations.
Alternating through and deck spans.
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