Needle Beam for Bridges. Page: 2 of 2
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UNITED STATES PATENT OFFICE.
EDWIN ELIJAH RUNYON, OF MOUNTAIN SPRING, TEXAS.
NEEDLE-BEAM FOR BRIDGES.
SPECIFICATION forming part of Letters Patent No. 400,874, dated April 2, 1889.
Application filed November 22, 1888. Serial No. 291,525. (No model.)
To all Wohona it m ay concern,: important also to construct the needle-beams
Beitknown thatI,EDWIN ELIJAH RUNYON, of as light a structure as is consistent with
a citizen of the United States, residing at the strain to which they are subjected. To 50
Mountain Spring, in the county of Cooke and effect both ends economically is the aim of my
5 State of Texas, have invented certain new and invention.
useful Improvements in Needle-Beams for The needle-beams A, when about to be lo-
Bridges; and I do declare the following to be a cated in proper position, are provided with
full, clear, and exact description of the inven- three central supports for the cables G, con- 55
tion, such as will enable others skilled in the sisting of the two pieces D' E. The former
io art to which it appertains to make anduse the has a groove, d, is hollowed semi-circumfer-
same, reference being had to the accompany- entially, and has flanges D. The latter has a
ing drawings, and to the letters and figures of groove, E', at right angles to the groove d, and
reference marked thereon, which form a part is similarly hollowed and flanged to encircle 6o
of this specification, the beam, the whole being secured by bolts e.
15 My invention relates to needle-beams for The cable II is passed through the grooves d
bridges; and its objects are, first, to provide and secured at each end by the caps B in the
them with appliances whereby to maintain groove b', that is made in the projection B',
wire cables in proper position and conduct The cap B also confines in place the annular 65
them between the termini of the bridge; sec- casting C, through whose groove c the cable
2o ond, to provide for interweaving the strands G' passes. This casting is so constructed that
of the cable during the progress of the con- the end B2 of the cap B rests in the recess of
struction; third, to adapt the parts to coact larger diameter, and the end B3 thereof rests
so that they will maintain the cables perma- in the recess of smaller diameter, thus mak- 70
nently in their pristine condition; fourth, to ing the casting- and cap flush. The cable F
25 provide such correlation of the parts that passes in the groove b of the cap B. As the
they shall uniformly conduce to invariable re- wires constituting the cables F G G' are placed
sults, and, fifth, to attain these ends with in position they are twisted to form cables,
structural simplicity and economy. I accom- sufficient tension being secured from the ter- 75
plish these aims by the mechanism illustrated mini to prevent uneven interweaving. The
30 in the accompanying drawings, in which- needle-beams are usually made of gas-piping,
Figure 1 represents a plan view of a section whose tubular structure combines lightness
of bridge constructed according to the prin- with durability.
ciples of my invention. Fig. 2 is a side ele- Having thus fully described my invention, 8o
vation of one of the needle-beams. Fig. 3 what I claim is-
35 shows one of the terminal caps that keep the 1. The combination, with the needle-beams
cable-supports in an inflexible position. Fig. A, of the castings C, the caps B, the supports
4 is an end view of the same. Fig. 5 is an ele- E and D', and the cables, substantially as de-
yation of a perforated annular casting that scribed. 85
encircles the needle-beam near the terminal 2. The combination, with the needle-beams
40 cap. Fig. 6 is an elevation of one of the ca- A, of the supports E and D', the caps B, and
ble-supports, and Fig. 7 is a central vertical the cables G and H, substantially as described.
section of the annular casting shown in Fig. 5. In testimony whereof I affix my signature in
The same designations indicate correspond- presence of two witnesses.
ing parts in the several views. EDWIN ELIJAH RUNYON.
45. In cable bridges it is desirable to prevent Witnesses:
shifting of the cables under stress of wind or JOHN HATCHER,
because of contraction and expansion. It is E. A. VINCENT.
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Rudyon, Edwin Elijah. Needle Beam for Bridges., patent, April 2, 1889; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth172018/m1/2/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.