Improvements in Anchors.
Year: 1894

page_text: The decision of the Comptroller-General of the 30th day of March 1895 allowed,
under Section 18 of the Patents, &c. Act, 1883, an Amendment of this
Specification.
Date of Application, 23rd Oct., 1894--Accepted, 8th Dec., 18
COMPLETE SPECIFICATION (AMENDED).
Improvements in Anchors.
We, WILLIAM COLTART of 50 Park Road, West, Birkenhead in the County of
Chester, Cable and Anchor Manufacturer, and EDWARD SHORE of 34 Saltney
Road, Chester in same county, Manager; 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 :—
This invention relates more especially to that type of anchors known as the
Martin or Tumble-down-Dick anchor and has for its object to give greater strength
and holding power with less complication of parts. The invention is best described
by aid of the accompanying drawings, in which
Figure 1 shows an anchor partly in section and in position for holding;
Figure 2 a view taken at right angles to Figure 1 ;
Figure 3 plan of head with the flukes or holding parts of the arms removed;
Figure 4 is an elevation of a kedge anchor or grapnel.
In these A is the head, B a slot in same having parallel sides, but ends at an
angle of 45° or thereabouts with the axis; C is the shank having a head on its end,
as shown. The shank C is passed through the slot from the back of the arms into
the position shown in Figures 1 and 2, until the head of the shank which is larger
than the slot comes against the head of the anchor. D is a pin screwed or rivetted
firmly into the shank, or a bolt and nut or cotter, or other abutment fixed firmly
into the shank, 80 as to prevent the shank from slipping back out of the slot, but
allowing of a little play, so that the arms can fall into the position_shown in
Figure 1, no matter which side of the shank at the time is uppermost. The shank
thus is capable of oscillating in the hole on its T-head as on the knife edge of a
weighing machine, instead of on a pin or crown bolt as heretofore. In the case of
kedge anchors or grapnels with three or more arms, the hole or slot in the anchor
head can be made conical or pyramidal or parallel. The shank can be either
conical, pyramidal or parallel where it passes through the head so as to fit rigidly
or have play as preferred. The shank has a T-head as in the case of Figures 1
and 2. It is obvious too, that the shank can have a pin or bolt through it as abut-
ment as in the case of the Martin's anchor, but it can if desirable have the
abutment forged on it and after it has been passed through the anchor head up to
the said abutment, the reverse way to that already described, the end can be rivetted
over or a head or nut screwed or otherwise fixed on, but this is not nearly so good
an arrangement as when the T-head is forged in the shank, and the latter is passed
through the anchor head in the manner first described, and we only mention it as a
colourable imitation to prevent others claiming it as a separate invention. The
anchors can be made of wrought iron throughout or in whole or in part of steel or
other metal.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1-
1. The process of making anchors which consists in forming the shank with a
head or abutment passing the shank through a hole or slot in the head of the anchor
till the head or abutment on the shank comes against the head of the anchor and
there forming another abutment or head on the shuft shank, on the opposite side of
the anchor head, allowing of the requisite play in the slot or hole in those cases
where play is required.
2. An anchor having a stock shank capable of oscillating to the required amount
in a slot or hole in the anchor head but retained in place by a head and abut-
ment substantially as described, instead of oscillating on a crown bolt as
heretofore.
Dated this 10th do of Anthon 1001
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, Nottingham, and London,
Patent Agents.