Improvement in wrought-iron posts
US 184521 A
Description (OCR text may contain errors)
. D. HAMMOND.
No. 184,521. Patented Nov. 21, 18-76.
UNITED STATES PATENT OFFICE,
DAVID HAMMOND, OF oAnToN, onto, ASSIGNQR T0 WROUGHT IRON BRIDGE COMPANY, OF SAME PLACE.
IMPROVEMENT IN WROUGHT-IRON POSTS.
Specification forming part of Letters Patent No- 184,521, dated November 21, 1876; application filed August 19, 1876.
To all whom it may concern:
of a wrought-iron post composed of a central plate or lattice-web and two T-bars, vprovided with ribs on the inner edges of. the heads, as is hereinafter more fully shown.
In the accompanying drawing,Figu're 1 is' a view of post embodying my improvement, and Fig. 2 is a section of'same on line :20 m.
A is the web of the post, and B B are the T-bars, the legs 0 of which are secured by rivets a, to web A. The T-heads B are made with flatbacks, being made flat to .allow of additional plates D being riveted on, to increase the cross-section of post, as indicated in dotted lines in Fig.2.
The legs 0 can be made on one side of the center of the head B. if desired, so as to bring the web A into the axis of the post.
When used in bridges-the chord-connections for the post ends are easily made by riveting on plates E and drilling them to receive the pins F. Y
The advantages resulting from this form of construction consist in a reduced cost, the plate and T-bars being cheaper iron than the rolled I-beam, and the labor being less than that of uniting a web with four angles also, in the increased width of head and concentration of metal at the edges of the head, which increases the stiffness and strength of the same amount of cross-section over the I- beam post form.
What I claim as new, and desire to secure As evidence of the foregoing, Witness my hand this 7th'day of August, A. D. 1876,
DAVID HAMMOND. Witnesses:
WM. BRITTON, J 03 ABBOTT.