Stockless Anchor.
Year: 1890

page_text: Date of Application, 27th May, 1890
Complete Specification Left, 17th Feb., 189'-Accepted, 18th Apr., 1891
PROVISIONAL SPECIFICATION.
Stockless Anchor.
FREDERICK JAMES SINNETTE, Woolston Lodge, Woolston, Southampton,
Surveyor of Shipping, do hereby declare the nature of this invention to be as
follows:-
Stockless anchor to be composed of two main parts, one comprising the shank
and the other the tripping head and two arms, the two arms thus act at same
time, or the two arms may be prepared separate from tripping head, but to act
at same time, the shank is to enter tripping head from the back or opposite
side to arms and to pass through a slot formed to receive it in the tripping
head until the shank has been brought up by the enlargement or stop formed
on its end being in contact with the back part of tripping head, and it is mainly
by this connection that the pull of the vessel on the shank of anchor will be
transmitted to the tripping head and hence to arms, the opposite end of shank
to shackle being intentionally considerably enlarged so as to prevent it passing
through the slot in tripping head as the other part of shank had done, and
thus obtain a connection between shank and tripping head and arms of immense
strength and power.
After the shank has been passed through the slot in tripping head until
the face of the enlargement or stop on end of shank fays against the back part
of tripping head, the shank is then pivoted on to front of tripping head by
means of a bolt passing through hole in shank and in the cheeks prepared on
front of tripping head; the tripping head and two arms are formed in one or
three parts as desired and the slot for shank is so enlarged vertically that when
the two arms are down on either side of shank in holding position of anchor
the back part of tripping head will fay against the face of the enlargement or
stop on end of shank, or in addition the tripping head may for its thickness fay
against the lower side of shank, or its front part may fay against the upper part of
shank, either separately or together as may be required according to size of anchor;
the outer end of shank being so much larger than the slot in tripping head and
faying as it does against an important portion of the outside of the tripping head,
the strength of the holding power of the anchor is comparatively immense and yet
can be increased to any desired extent without depending on bolt connections or the
like, since the full force and thrust of strains are transmitted from a large bearing
surface of shank to a large bearing surface located in a most favourable position on
back of tripping head and thus to arms; further by this arrangement of pivoting
shank at front of tripping head, there will be practically no space but what will
be occupied by the shank, hence the usual most objectionable open spaces at this part
will be entirely prevented, the necessary enlargement of slot for working arms to the
desired angle each way being commenced at front of tripping head and opened
out vertically toward the back, thus allowing for soft holding ground the full
advantage and the greatest possible value of the holding and resisting surface of
front of tripping head to be obtained, and at same time admitting of closer stowage
against bows of vessel when anchor is stowed in hawse pipe.
1000

page_text: COMPLETE SPECIFICATION.
Stockless Anchor.
FREDERICK JAMES SINNETTE, Woolston Lodge, Woolston, Southampton,
Surveyor of Shipping, do hereby declare the nature of this invention, and in what
manner the same is to be performed, to be particularly described and ascertained in
and by the following statement :-
The object of my invention is the introduction of a stockless anchor composed of
two main parts, one comprising the shank and the other the tripping head and two
arms, the two arms thus act at same time, or the two arms may be prepared separate
from tripping head, but attached to it in order to act at same time, the shank is to
enter tripping head from the back or opposite side to arms and to pass through a
slot formed to receive it in the tripping head until the shank has been brought up
by the enlargement or stop formed on its end being in contact with the back part
of tripping head, and it is mainly by this connection that the pull of the vessel on
the shank of anchor will be transmitted to the tripping head and hence to arms, the
opposite end of shank to shackle being intentionally considerably enlarged so as to
prevent it passing through slot in tripping head as the other part of shank had done,
and thus obtain a connection between shank and tripping head and arms of
immense strength and power, after the shank has been passed through the slot in
tripping head until the face of enlargement or stop on end of shank fays against
the back part of tripping head, the shank is then pivoted on to front of tripping
head by means of a bolt passing through hole in shank and in the cheeks prepared
on front of tripping head; in order to fully realize the benefit of the strength of
one main part pulling on the other main part I elongate the bolt hole in shank or
so fashion the bolt that it is relieved of practically all shocks or strains when the
vessel is riding to her anchor.
The accompanying figures illustration the application of my invention, the
tripping head and two arms are formed in one or three parts as desired, and the slot
for shank is so enlarged vertically that when the two arms are down on either side
of shank in holding position of anchor, the back part of tripping head will fay
against the face of enlargement or stop on end of shank, or in addition when anchor
is in holding position the tripping head may for the greater portion of its thickness
at the part forming either upper or lower sides of slots according to which way head
of anchor trips fay against the lower side of shank, or its front part over either
upper or lower sides of slot according to which way head of anchor trips may fay
against the upper part of shank either separately or together as may be required
according to size of anchor, the outer end of shank being so much larger than slot
in tripping head and faying as it does against an important portion of the outside of
the tripping head, the strength of the holding power of the anchor is comparatively
immense and yet it can be increased to any desired extent without depending on
bolt connections or the like, since the full force and thrust of strains are transmitted
from a large bearing surface of shank to a large bearing surface located in a most
favourable position on back of tripping head and thus to arms. Further by this
arrangement of pivoting shank on bolt at front of tripping head there will be
practically no space but what will be occupied by the shank, hence the usual most
objectionable open spaces at this part will be entirely prevented, the necessary
enlargement of slot for working arms to desired angle each way being commenced
near front of tripping head and opened out vertically toward the back, thus
allowing for soft holding ground the full advantage and the greatest possible value
of the holding and resisting surface of front of tripping head to be obtained and at
same time admitting of closer stowage against bows of vessel when anchor is
stowed in hawse pipe. Although I have described and illustrated a two armed
stockless anchor it is not to be understood that it is the only kind of stockless
anchor my invention is applicable to, for I find it equally suitable for a stockless

page_text: anchor having more arms than two, thus it is well suited in the case of an anchor
having two arms horizontally and two arms vertically. It must further be under-
stood it is equally well suited in the case of anchors fitted with stocks. It is also
plain that the enlargement on end of shank may be carried out in several ways and
forms different to that shown in figure, and that the same remark applies with equal
force to the formation of slot in back of tripping head to receive it, I find the
enlargement on end of shank may be carried outside of tripping head altogether
instead of being recessed into it as shown, or it may be fitted so that it will house
some distance inside of back of tripping head, in that case the size of slot opening
on back of tripping head may be considerably reduced and if desired a small cover
may be easily fitted so as to entirely close the slot opening, at same time it is
apparent that a cover may be fitted to close the slot opening shown in the figure;
further the bolt for arms and tripping head to pivot on may be placed back into
them so as to be entirely housed within arms and tripping head and pass right
across from outside one arm to outside the other arm, instead of passing through
cheeks on front of tripping head as shown in figure.
Fig. 1. is a two armed stockless anchor in plan.
A is the shank, B is the tripping head, C is the slot in tripping head, D is. the
bolt at front of tripping head, E is the bolt hole in shank.
Fig. 2. is a side elevation of same anchor.
Fig. 3, is a back view of tripping head of same anchor.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
Making a stockless anchor of immense strength and holding power by having the
full force and thrust of strains transmitted from a large bearing surface of one main
part the shank direct on to a large bearing surface located in a most favourable
position of another main part the head without depending on the usual bolt connec-
tions or the like and at same time obviating the objectionable open spaces at front
of tripping head, the whole substantially as described.
Dated this 16th day of February 1891.
FREDERICK JAMES SINNETTE.