Improvements in Anchors.
Year: 1891

page_text: Date of Application, 15th May, 1891
Complete Specification Left, 6th Feb., 1892-Accepted, 12th Mar., 1842
PROVISIONAL SPECIFICATION.
Improvements in Anchors.
We HENRY PERSHOUSE PARKES of Tipton Green Chain and Anchor Works
Tipton in the County of Stafford Chain and Anchor Manufacturer and JOHN
HARTNESS of East Boldon near Newcastle-on-Tyne Engineer do hereby declare
the nature of this invention to be as follows:-
Our invention has reference to anchors of the kind described represented and
claimed in the Specification of Letters Patent granted to one of us namely John
Hartness dated June 6th 1887 No. 8124 that is to say anchors having no stock and
in which the function of a stock namely the prevention of rolling is performed by
the parts at the head of the anchor.
In constructing an anchor according to our invention we employ only three
principal parts that is the shank the head the tripping pieces and arms made in one
piece and a pin or pivot by which the head and stock are jointed together. The
head is nearly semi-elliptical at its outer side and in a recess at its inner side the
nearly cylindrical end of the shank is situated. The pin or pivot by which
the shank and head are jointed together passes through holes in the head and is
secured in place by a cotter. The arms are parallel and so close together that
there is only room for the shank to work freely between them. This proximity of
the arms gives the anchor the advantage of a one armed anchor. The sides of the
recess in the head constitute stops which limit the angle the shank can make with
the arms.
The angle we prefer is from forty-five to sixty degrees but we do not
limit ourselves to any particular angle. The tripping pieces are situated on the
sides of the head constituting lateral extensions of the head. The position of the
tripping pieces at the sides of the head enables them to perform the function of a
stock in addition to that of tripping pieces.
Anchors constructed according to our invention have all the advantages of
anchors in which one arm only is in use at a tinic. They have great holding power
are more certain in action than ordinary anchors. They have all the advantages
of Trotman's Porter's and Rodger's anchors having stocks and are capable of being
taken into the hawse pipe. They are simple in construction economical in
manufacture and from their simplicity not liable to get out of order.
Dated the 15th day of May 1891.
W. T. WHITEMAN.
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Anchors.
We, HENRY PERSHOUSE PARKES, of Tipton Green Chain and Anchor Works,
Tipton in the County of Stafford, Chain and Anchor Manufacturer, and JOHN
HARTNESS, of East Boldon, near Newcastle-on-Tyne, Engineer, do hereby declare
the nature of our invention and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement :-
Our invention has reference to anchors of the kind described, represented and
claimed, in the Specification of Letters Patent granted to us, dated June 6th 1887
No. 8124, that is to say, anchors having no stock and in which the function of a
stock, namely the prevention of rolling is performed by the parts. at the head of
the anchor.
. In constructing an anchor according to our invention we employ only three
Paino 17

page_text: principal parts; that is, the shank, the head, the tripping pieces and arms made in
one piece, and a pin or pivot by which the head and shank are jointed together.
The head is nearly semi-elliptical at its outer side and in a recess at its inner
side the nearly cylindrical end of the shank is situated. The pin or pivot by
which the shank and head are jointed together passes through holes in the head
and is secured in place by a cotter. The arms are parallel and so close together
that there is only room for the shank to work freely between them. This proximity
of the arms gives the anchor the advantage of a one armed anchor. The sides of
the recess in the head constitute stops which limit the angle the shank can make
with the arms.
The angle we prefer is from forty-five to sixty degrees but we do
not limit ourselves to any particular angle. The tripping pieces are situated on the
sides of the head constituting lateral extensions of the head. The position of the
tripping pieces at the sides of the head enables them to perform the function of a
stock in addition to that of tripping pieces.
Figure 1 of the accompanying drawing represents in plan, Figure 2 in horizontal
section and Figure 3 in side elevation, a stockless anchor constructed according to
our invention;
Figure 4 represents the said anchor partly in side elevation and partly in cross
section with its arms represented at their proper working angle on one side of the
shank.
The same letters of reference indicate the same parts in the several figures of
the drawing.
a is the shank of the anchor without a stock: bis the head of the anchor : c, c are
the extended tripping pieces on each side of the said head and d, d are the arms of
the anchor, the said head b, tripping pieces c, c and arms d, d being preferably made
in one piece.
It will be seen by an examination of the drawing that the arms d, d of the
anchor are parallel and so close together that there is only room for the shank a
to work freely between them. This position of the arms gives the anchor the
advantage of a one armed anchor. The head of the anchor is nearly semi-
elliptical at its outer side (best seen in Figure 4) and has a circular recess f at its
inner side for receiving the circular end of the shank a. On either side the said
circular recess are stops g, g² for limiting the angle which the shank a can make
with the arms d, d. The shank a is jointed to the head by the cross pin or
pivot h. This pin or pivot his passed through an eye in the circular end in the
shank a and through holes, in the head as seen in Figure 2 and is secured in its
place by a cotter.
The shape and position of the extended tripping pieces c, c are best seen in
Figures 1 and 2. The said tripping pieces constitute lateral extensions of the head
and their position enables them to perform the function of a stock, that is, to
prevent the rolling of the anchor, in addition to that of tripping pieces.
The action of the stops for limiting the angle which the arms can make with
the shank is represented in Figure 4. When the arms d, d are tripped in one
direction they take the position with respect to the shank a represented in the said
Figure 4, the stop 9 on the head bearing against the shank and preventing the
further motion of the said arms; and when the arms are tripped in the other
direction the other stop on the head bears against the opposite side of the
shank a.
The arms of the anchor represented are arranged to move through an
angle of 60 degrees on either side the centre line of the shank a, but we do not
limit ourselves to that working angle as a working angle between 45 and 60 degrees
may be adopted. Neither do we limit ourselves to the method represented of
jointing the shank to the head, nor to the stop arrangement represented for
limiting the motion of the arms with respect, to the shank as other equivalent
arrangements may be adopted for those purposes.
Anchors constructed according to our invention have all the advantages of
anchors in which one arm only is in use at a time. They have great holding.
power, are more certain in action than ordinary anchors. They have all the
.

page_text: -
advantages of Trotman's, Porter's and Rodger's anchors having stocks and are
capable of being taken into the hawse pipe. They are simple in construction,
economical in manufacture, and from their simplicity not liable to get out of order.
Having now particularly described and ascertained the nature of our invention
and the manner in which the same is to be performed we declare that we claim
as our invention of "Improvements in anchors'
Constructing the sides of the head of stockless anchors with extended tripping
pieces, which perform the function of a stock in addition to that of tripping pieces
and the combination with the connected head and tripping pieces of arms which are
parallel and brought so near together that the anchor possesses the advantage of a
one armed anchor; and jointing the combined head, extended tripping pieces and
the said arms to the shank and limiting the working angle of the said arms with
respect to the shank substantially as hereinbefore described and illustrated in the
accompanying drawing.
Dated the Second day of February 1892.
HENRY PERSHOUSE PARKES.
JOHN HARTNESS.