IMPROVED TUBULAR CHAIN CABLE GUIDE FOR VESSEL'S BULWARKS
Year: 1859

page_text: LETTERS PATENT to Isaac Adams, of the State of Massachusetts, of the
United States of America, for the Invention of an "IMPROVED TUBULAR
CHAIN CABLE GUIDE FOR VESSEL'S BULWARKS."-A communication from
Alfred S. Phillips, a resident of Boston, of the said State of Massachusetts.
Sealed the 17th June 1859, and dated the 6th April 1859.
COMPLETE SPECIFICATION filed by the said Isaac Adams at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 6th April 1859, pursuant to the 9th Section of the
Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, BE IT
KNOWN that I, ISAAC ADAMS, of the State of Massachusetts, of the United
States of America, am in possession of an Invention of an "IMPROVED TUBULAR
CHAIN CABLE GUIDE FOR VESSEL'S BULWARKS," and I do hereby declare that the
nature of the said Invention, and the manner in which it is to be performed,
or in other words, its construction and mode of operation, are fully described
and ascertained in and by the following Specification and the accompanying
Drawings, of which Figure 1 exhibits a longitudinal and vertical section of
the ordinary straight cable guide or bawser pipe, and a chain cable extending
through the same. Figure 2 is a similar section of my improved cable guide,
and shows the manner in which a chain cable is guided thereby through the
bulwarks or bow of a ship.

page_text: The tubular cable guide heretofore in use has been a straight pipe having a
flange projecting from its outer end, an annulus. or smaller ring being often
applied to the inner end and the bulwark, as shown in Figure 1, wherein A
denotes the pipe; a, its flange; b, the ring; B, the bulwark; and C, the
chain cable.
In drawing a chain cable through a hawse hole or cable guide of this
description, the front part or end of a link is likely to be brought up quickly
against the sharp corner or angle c of the lower part of the pipe and flangė,
and in consequence thereof to break. Besides this, there is great friction
created on the chain by such angle or corner, while the chain is being taken
in or drawn through the pipe A. Furthermore, while a vessel is riding at
anchor and pitching on the waves, there is much danger of breakage of the
anchor, cable, or chain by the action of the said corner of the hawser pipe
against it.
My Invention consists in an improved manufacture of cable guide as made
with its body or pipe curved in longitudinal section, substantially as shown in
Figure 2, the exturnal surface of the flange being made in continuation of the
curve of the body, and so that the chain, while either running out or being
drawn in, shall pass over and on a curved surface, such as will prevent any
link from being estopped so as to be broken, such curve of the flange and the
inner surface of the pipe will also operate to diminish the danger of breakage
of a chain cable while the vessel held by it may be riding at anchor in stormy
weather, or while pitching on the waves.
In Figure 2, A denotes the improved cable guide; B, the bulwark; C, a
cable or chain; a, the flange; b, the ring; and d, the curve of the bearing
surface for the chain.
I do not claim the cable guide shown in Figure 1; but what I do claim is
the improved manufacture of cable guide made substantially as exhibited in
Figure 2, and as above specified.
In testimony whereof, I have hereunto set my signature and seal, this :