IMPROVE- MENTS IN THE MANUFACTURE OF ANCHORS
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by the said Charles Mace at the Office
of the Commissioners of Patents on the 7th March 1883.
CHARLES MACE of Sunderland in the County of Durham, Engineer " IMPROVE-
MENTS IN THE MANUFACTURE OF ANCHORS
"
My invention relates to manufacturing anchors of any form or type by casting
their several parts of mild steel or other metal, sufficiently tough and malleable
(or rendered so by subsequent annealing) and so disposed in the castings as to:
obviate liability to unequal contraction in cooling.
To effect this I form, from a pattern, moulds of the external shapes of the several
parts of the anchor as the shank arms and flukes and of the stock (or any of them)
and by means of "cores" placed in said moulds I niake these parts in the castings
tubular in section, so that the material shall be so uniformly distributed as to:
cause the contraction to be equal and the annealing process to act upon every part:
effectually. Provision is made where required for removing the "cores after the:
annealing is completed.
In addition to the soundness of the casting and perfect annealing, the tubular.
form of the various parts gives great increase of strength with the same weight of
material which is disposed so as to realise its greatest value.
In order to give increased durability sharpness and penetration to the " flukes,”;
their points may be "tipped," by reheating and hammering and afterwards
tempering them, in the usual manner, to any required hardness.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Mace in the Great Seal Patent Office on the 7th September
1883.
CHARLES MACE of Sunderland in the County of Durham, Engineer "IMPROVE-
MENTS IN THE MANUFACTURE OF ANCHORS
"
My invention relates to manufacturing anchors of any form or type by casting
their several parts of mild steel or other metal sufficiently tough and malleable
(or rendered so by subsequent annealing) and so disposed in the castings as to
obviate liability to unequal contraction in cooling.
To effect this I form from a pattern, moulds of the external shapes of the
several parts of the anchor as the shank arms and flukes and of the stock (or any
of them) and by means of "cores" placed in said moulds I make these parts in
the castings tubular in section so that the material shall be so uniformly distributed
as to cause the contraction to be equal and the annealing process to act upon every
part effectually. Provision is made where required for removing the “ cores
after the annealing is completed.
"1
In addition to the soundness of the casting and perfect annealing, the tubular
form of the various parts gives great increase of strength with the same weight
of material which is disposed so as to realise its greatest value.
In order to give increased durability sharpness and penetration to the "flukes"
their points may be "tipped" by reheating and hammering, and afterwards
tempering them in the usual manner to any required hardness.
DESCRIPTION OF DRAWINGS,
On the accompanying sheet of drawings I illustrate the application of my
invention to the manufacture of an anchor of the Trotman type with stock Fig 1
being a side elevation; Fig 2 a plan, Fig 3 the stock; Figs 4, 5, and 6 respectively
sections through arm at A B-Fig 2, through shank at C D Fig 2, and through the
stock Fig 3.
S is the shank having a double eye at one end to receive the fluked arms F on
the bolt B, and a shackle for the chain at the other. The shank is tubular as
shewn by dotted lines, the "core" being taken out at junction of the double eye.
The fluked arms F are also cast hollow as shewn by the dotted lines, the "cores
being taken out at holes H, H, H, H, provided in the most convenient positions,
which holes may be closed with plugs if desired.
"
"
As applied to Anchors of any other form or type and "stocked" or stockless "
the same mode of manufacture is followed, the various parts being "cored" out so
as to dispose the material in the strongest form and to facilitate the perfect
annealing of them.
Having now described my invention and illustrated how I propose to carry it
into practical use in one form of anchor, I claim as novel and secured to me by
Letters Patent.
The manufacture of anchors by casting them of steel or other metal of tubular
or hollow form substantially as shewn and described.
In witness whereof I the said Charles Mace have hereunto set my hand and
seal this seventh day of September in the year of Our Lord one thousand eight
hundred and eighty three.
0
CHARLES MACE (L.S.)