IMPROVEMENTS IN THE CONSTRUCTION OF ANCHORS
Year: 1853

page_text: PROVISIONAL SPECIFICATION left by Robert James Maryon at
the Office of the Commissioners of Patents, with his Petition,
on the 10th October 1858.
I, ROBERT JAMES MARYON, of 37, York Road, Lambeth, in the
County of Surrey, Gentleman, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF ANCHORS
as follows:-
Firstly, I claim the several methods of forming the lower arms or
flukes of anchors of a concave shape, either with single or double palms,
either for swivel or fixed flukes. Secondly, for the several methods of
constructing the shanks and stocks or upper arms of anchors, and
particularly for certain means of adgusting and reverseing the upper
arms or stocks of anchors, which the detail'd Sheet of Drawings fully
exemplify, the principles of which I confine myself to only (and not
the precise shape or form or proportions thereof), as seen or shewn in
Fig. 1, shews a sectional elevation of air anchor as taking the ground,
being on the principle of the swivel flukes well known in the marine
as Porter's Patent, (and which resembleance exists only in the swivel
pin at Fig. A, and which part of flukes in Fig. 1, 1 only disclaim).

page_text: gaws
B, is the ground or bite of the anchor with the double or duplex
palms entering at one time; the red line doted is the ground; (the
advantages of this swivel flukes anchor over Porter's or any other
is, firstly, it does away with the unpleasent progection or obstruction
in thoes anchors called a horn,) which impede the anchor in entering
the ground, and which I displace in this Fig. of anchor shown by
turning the figure upside down,. looking at Fig. C, which will
represent the anchor with its under fluke close to the shank, from
which position it is thrown or drawn out by the cable draging it
in contact with the ground by means of the palm of the outer arc
being the most prominent, and which is concaved from the palms of
the inside and outside ares upwards at such regular or irregular
incline as I think consistent with strength, and to admit of sufficient
clearence to facilitate its entry of the ground. D, is the shank, which is
concaved, as far as may be, also, consistent with strength; from the
(which are of old construction, which I also disclaim) as far as the
collar at Fig. E; from thence to Fig. F, is left or formed round, so as
to admit of the stock nut to travel up and down the shank, so as to
adjust the slock when the anchors is over the bows of ships for their
safety when under weigh, thereby preventing in case of collission any
damage to either occursion. Fig. G, G, are studs or guides for the nut
to travel up and down the shank so as to turn a quater of a circle
as necessary to bring the stock of anchor in a line parallel with
its flukes when not employed in the ground, and when employed the
reverse way to the flukes. Fig. 2, is an edge veiu of shank of this
anchor, and section H is a rest peice for the inside of palm to take its
bearing on when in action. Fig. 3, is sections shewing the substance
and shape of flukes and palms, which are made flater on their sur-
faces towards their extremities. Fig. 4, is a plan of my tubular
shank; in this it is made oval so as to take greater strain with lighter
metal than the solid metal at the same weight, also for portability
either for swivel or fixed flukes being jointed or connected at Figs. I, I,
the form of tube shewn at Fig. K, K. Fig. 5, shews another form of
palms of anchor. B, is the ground and palms of anchor, the outer palm
taking the ground first by reason of the palms of the outer and iner arcs,

page_text: being brought into a straight line parallel, as shewn by the lines from
which the arms or flukes are drawn at Fig. L, L, shewing at Fig. m,
the stock nut and cap and shackels applyed (the shackles being of old
construction I disclaim). Fig. 6, is detailed parts of stock nut, cap,
and arms.
Fig. n, is a cast or wrought metal box or nut, a section of
which is shewn in details at N, large; it has one, two, or more diagonal
or curvilinear slots, or what is commonly known as a screwed nut cut
or cast within its cilinder. Fig. O, shews an end veiu of the nut,
which, if cast, will be placed secure within the cilinder P, being
wrought iron; on its outer extremities are formed arms, which are to
receive the tubular arm stocks at Q, Q. R, R, is swivel stops or balls,
being so fastned in the tube as to be free to turn either way, when by
the law or action of gravity they will be undermost and keep the
anchor from listing or canting when first biting the ground, but of
course they can be made in the solid if prefered for cheapness. Fig. S,
is the cap which is formed to fit the end of the anchor shank F, and
before described; the cable is attached to the shackel at T, T; shackel
at u, Fig. S, is to suspend or secure it by when required over the bow
of vessel ready to let go; whil in this position the stock will be in a
line parallel with the flukes at rest on the shoulder of anchor shank at
Fig. E, shewn at Fig. 1, Sheet 1; and immediatly the fastnings are let
go it will fall with force and tighten or bring it up on or by the cable,
when by the law or action of gravity the cable being fast to the stock
nut, the anchor will commence a rotatory motion to the extent of a
quater of a turn, when the cable will keep it in that position so long
as their is strain or weight applyed. Fig. 7, Sheet 2, shews the back
veiu of flukes of anchor shewn at Fig. 1, Sheet 1, which is seen by
black lines, the outer arc fluke palms shortest, and Fig. 8, the reverse.