Improvements in the Construction of Anchors.
Year: 1893

page_text: Date of Application, 19th Jan., 1893
Complete Specification Left, 20th Nov., 1893-Accepted, 23rd Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Anchors.
I, GEORGE TYZACK, of Cookson's Quay, South Shields, in the County of
Durham, Engineer and Government Contractor, do hereby declare the nature of
this invention to be as follows:-
This invention relates to certain improvements whereby simplicity of parts,
facilitating the manufacture combined with efficiency are attained.
The crown piece carrying the arms has a cavity through it in the direction of
the shank and into this cavity is inserted from the back a block, preferably made
of crucible steel, a projecting flange upon which, when it is in position, abuts
against the crown piece and the inner end forms a double eye or a single eye to
receive a corresponding single eye or a double eye as the case may be formed upon
the shank and a bolt passing through both eyes makes the main connection the
arms turning to the required angle in either direction and being there stopped
by a tripping piece on the crown coming in contact with the shank.
17
In putting the anchor together the single or double eye on the shank is slipped
into the single or double eye on the block and the bolt inserted and the block now
being brought into position in the cavity with its projecting flange abutting upon the
back of the crown piece, one half of the bolt in the double and single eyes is
"housed" within the cavity the sides of which prevent the bolt from coming out,
but in addition to this security the flush ends of the bolt may be slightly countersunk
rivetted in the double eye.
Provision will be made to prevent the displacement of the block in the cavity
of the crown piece by concussion when the anchor strikes the ground.
<<
The anchor is now complete and upon reaching the ground the "tripping" piece
causes the arms to cant into penetrating position and to hold instantly whilst the
trips "themselves lie in the line of the shank and offer no counteracting effect to the
holding power of the palms as is the case with many types of stockless anchors.
The whole strain on the anchor is now taken through the double and single eyes
and their connecting bolt direct to the block the projecting flange upon which
transmits the entire strain to the crown piece and through it to the arms embedded
in the ground.
In a modified form the block with the double or single eye connection (as the
case may be) to the shank can be inserted into the cavity in the crown from the
opposite or front side and in this case a key or other equivalent fastening will secure
the projecting end of the block after it is in position so as to take the strain against
the back of the crown piece. The first named method of construction with the
flanged block inserted from the back of the crown piece is that which I prefer.
Dated this 19th day of January 1893.
T. J. DANSON,
By L. W., per F. B.
COMPLETE SPECIFICATION.
Improvements in the Construction of Anchors.
I, GEORGE TYZACK, of Cookson's Quay, South Shields, in the County of
Durham, Engineer and Government Contractor, do hereby declare the nature of
this invention to be particularly described and ascertained in and by the following
statement:-
This invention relates to certain improvements whereby simplicity of parts,
facilitating the manufacture combined with efficiency are attained.

page_text: .
The crown piece carrying the arms has a cavity through it in the direction of
the shank and into this cavity is inserted from the back a block, preferably made
of crucible steel, a projecting flange upon which, when it is in position, abuts
against the crown piece and the inner end forms a double eye or a single eye to
receive a corresponding single eye or a double eye as the case may be formed
upon the shank and a bolt passing through both eyes makes the main connection,
the arms turning to the required angle in either direction and being there stopped
by a tripping piece on the crown coming in contact with the shank.
In putting the anchor together the single or double eye on the shank is slipped
into the single or double eye on the block and the bolt inserted and the block
now being brought into position in the cavity with its projecting flange abutting
upon the back of the crown piece, one half of the bolt in the double and single
eyes is "housed" within the cavity the sides of which prevent the bolt from coming
out, but in addition to this security the flush ends of the boit may be slightly
countersunk rivetted in the double eye.
Provision will be made to prevent the displacement of the block in the cavity
of the crown piece by concussion when the anchor strikes the ground.
66
The anchor is now complete and upon reaching the ground the "tripping" piece
causes the arms to cant into penetrating position and to hold instantly whilst the
trips" themselves lie in the line of the shank and offer no counteracting effect to
the holding power of the palms as is the case with many types of stockless anchors.
The whole strain on the anchor is now taken through the double and single eyes
and their connecting bolt direct to the block the projecting flange upon which
transmits the entire strain to the crown piece and through it to the arms embedded
in the ground.
In a modified form the block with the double or single eye connection (as the
case may be) to the shank can be inserted into the cavity in the crown from the
opposite or front side and in this case a key or other equivalent fastening will secure
the projecting end of the block after it is in position so as to take the strain against
the back of the crown piece. The first named method of construction with the
flanged block inserted from the back of the crown piece is that which I prefer.
DESCRIPTION OF DRAWINGS.
The accompanying 3 sheets of drawings illustrate my invention.
On Sheet 1, Figs. 1 and 2 shew two views of a complete anchor with the "block,"
formed as a double eye, inserted in the cavity in the "crown-piece" from the back;
Fig. 3 is a view looking on the front of the "crown-piece" in the direction of the
arrows on Fig. 2, with the eye of the shank removed; Fig. 3ª is a similar view
looking on the back of the "crown-piece" and Figs. 38 and 30 shew separate views
of the "block" with double eye, and Figs. 4, 44 and 4B shew the "block" formed
as a single eye, the double eye being upon the shank, see Fig. 5.
On Sheet 2, Figs. 1 and 2 shew two views of a complete anchor with the "block"
formed as a double eye, inserted in the cavity in the "crown-piece" from the front.
Fig. 3 is a view looking on the front of the "crown-piece." in the direction of the
arrows on Fig. 2; Fig. 3ª is a similar view looking on the back of the "crown-
piece" and Figs. 4 and 44 shew separate views of the "block."
On Sheet 3, Figs. 1 and 2 shew two views of a complete anchor with the "block,"
forming a double eye, inserted from the back of the "crown-piece" and fixed in
the manner which I prefer. Figs. 3 and 34 are front and back views respectively
of the "block" and part of the "crown-piece" and Figs. 4 and 4^ are separate
views of the "block."
The same letters refer to similar parts on all the sheets where such parts occur.
Referring to Sheet 1, Figs. 1, 2, 3, and 3^, A is the anchor shank, B the coupling
"block" inserted from the back in the cavity C in the "crown-piece" D and
having solid upon it the flange E which takes the entire strain upon the coupling
bolt F through the shank and double eye of the "block" and four bolts screwed

page_text: "
crown-piece" D
into the "crown-piece" prevent the "block" being displaced by concussion, see
Fig. 3. On Figs. 4, 44, and 4B the "block" B is shewn with a single eye, the
double eye being formed upon the shank, see Fig. 5. Upon the "
are formed the "tripping" pieces F F and the "flukes or "palms "Ġ turning
with thein, and by their action, to the proper angle see Fig. 1.
Referring to Sheet 2, Figs. 1 and 2, A is the shank, B the coupling "block"
inserted from the front in the cavity in the "crown-piece" D and having solid
upon it the flanges E which bears against the front of the "crown-piece" and in
conjunction with the key (or keys) K secures the "block" therein and prevents it
being displaced on the anchor striking the ground. F is the coupling bolt secured
in position in the "block" B by the cavity C. In this form of the anchor the
whole strain from the shank through the coupling bolt is taken by the key K, or
keys preferably split, through the "block" B bearing against the back of the
crown-piece." Figs. 4 and 4 shew two views of the "block
section.
66
each one half in
Referring to Sheet 3 the coupling block is inserted in the cavity C m tlie
"crown-piece" D from the back and has formed upon it, on each side, a projection L
which fits a groove M in each side of the cavity C, see dotted lines on Fig. 34,
and, when in position with the flange bearing against the back of the "crown-piece,"
two split keys Kare driven in between the projections L and the front of the "crown-
piece" and so the "block" is secured in the "crown-piece" and prevented being
displaced on the anchor striking the ground. These keys I prefer to the bolts through
1
the flange screwed into the back of the "crown-piece" as shewn on Sheet 1, as being
less liable to break or become loose and the flange E is also much stronger. This
mode of fitting the "block" will be seen by reference to Fig. 3 on which the left
side is a view looking on the front of the "crown-piece" in the direction of the
arrows, see Fig. 2, and the right side a section through a-6 Fig. 2. Figs. 4 and 4ª
shew two views of the "block" each one half in section.
Having now particularly described and ascertained the nature of said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
crown-
1st. The improvements in anchors consisting in attaching the shank, formed with
a single or double eye, to the "crown-piece" by means of a solid "block," forming
a double or single eye, inserted, from the back, in a cavity through the "
piece" upon which a flange upon the "block" abuts and takes the entire strain by a
bolt through the double or single eyes of the shank and "block," said "block"
being prevented from displacement backward by keys or bolts substantially as
described.
2nd. The alternative construction in which the shank, formed with a single or
double eye, is attached by means of a solid "block," forming a double or single
eye, inserted from the front, in a cavity through the "crown-piece" upon which a
flange upon the "block" abuts, and prevents displacement backward, the entire
strain being taken through a bolt in the double or single eyes of the shank and
"block" by a key or keys inserted through the projecting end of the "block" nud
abutting upon the back of the "crown-piece" substantially as described.
3rd. The improved construction of anchors, comprising the complete anchor,
shewn by Figs. 1 and 2 on Sheet 1 of the accompanying drawings, consisting of
the separate parts, shewn by Figs. 3, 34, 4, 44, 4B, and 5, in combination and
operating substantially as described.
4th. The improved construction of anchors comprising the complete anchor, shewn
by Figs. 1 and 2, Sheet 2, of the accompanying drawing, consisting of the separate
parts shewn by Figs. 3, 34, 4, and 44 in combination and operating substantially as
described.
5th. The improved construction of anchors, comprising the complete anchor
shewn by Figs. 1 and 2, Sheet 3, of the accompanying drawings, consisting of the

page_text: separate parts shewn by Figs. 3, 3, 4, and 44, in combination and operating
substantially as described.
Dated this 20th day of November 1893.
T. J. DANSON, F.I.P.A.,
Chartered Patent Agent, Agent for Applicant.