Improvements in Chocks and Gripes for Ships' Boats.
Year: 1891

page_text: Date of Application, 4th July, 1891
Complete Specification Left, 1st Apr., 1892-Accepted, 21st May, 1892
PROVISIONAL SPECIFICATION.
Improvements in Chocks and Gripes for Ships' Boats.
FREDERICK WILLIAM JONES 61, Louis Street Great Homer Street Liverpool,
Mariner, do hereby declare the nature of this invention to be as follows:-
The first part of this invention relates to "boats' chocks." The "chocks" are
divided into three parts and are made to fall through the skid or beam upon which
they rest by the pulling of a lever which is connected with mechanism under the
chock. The parts of the chock do not entirely separate but are connected with
each other.
The second part of this invention relates to "boats' gripes." The lower end of
each gripe fits into a socket through which a bolt is passed, each bolt is connected
to a bar and by pulling a lever which is connected to the bar, the whole of the
bolts are drawn and the boats' gripes are at once set free.
Dated this Third day of July 1891.
FREDERICK WILLIAM JONES.
COMPLETE SPECIFICATION.
Improvements in Chocks and Gripes for Ships' Boats.
I, FREDERICK WILLIAM JONES of 61 Louis Street, Liverpool, in the County
of Lancaster, Mariner, do hereby declare the nature of this invention and in what
manner the same is to be perforined, to be particularly described and ascertained
in and by the following statement:―
I construct of wood and suitable metal, ships' boats' chocks in three parts with a
system of bolts and levers under each part and connected with each other in such a
manner that by the pulling of a lever which is attached to each skid the chocks are
set free, and the skids being made skeleton in two parts, the chocks drop down
between the said parts of the skids, leaving the boats suspended by the tackles
which are always hauled taut and made fast.
Also. That by the further pulling of the said lever which is attached to each
skid, the boats' gripes are set free and the boats are ready for swinging out by the
davits, and as each ship's boat is provided with two or more sets of chocks and
gripes which are alike, I shall proceed to describe one set as follows:-
In all the views like letters, where used, denote the same parts.
The chock is made in three parts in the manner shewn in the drawings (Figs. 1
and 2, Sheet 1), the chock may be solid throughout if preferred. The length and
width of each part coinciding with the three parts of the lock (Fig. 4, Sheet 2),
and the depth from where the keel of the boat rests at 'd' to the bottom of the
chock at is about twice the clearance the keel of the boat is allowed above, the
skid. A, A, are plates with cogs, which I call cog-plates, fitted into the side of
the chock and made for the cog wheels in the skid to work in. The lower parts of
the cog-plates are straight for the distance that the centre part of the chock drops
in the skid, the upper parts being circular in which the teeth are bevelled.
B, B, are studs made to screw into sockets fitted on each side of the chock; these
studs catch on the shoulders M, . . M, (Fig. 3, Sheet 2) to prevent the chock falling
through the skid too far. C, is the lever, fitted in the skid, used to set the chock
and gripes free; this lever may be fitted with a socket for holding the crank
handle used at D in raising the chock to its place. E, E, are the gripes fitted with
tongues at the lower ends which fit into sockets made and fitted on to the outside
of the skid and through which pins or bolts pass from the elbows on the inside to
CD27

page_text: F, F, are
secure the gripes; the gripes are fitted with screws to set them taut.
covers fitting over the skid with a slot in one for the lever C to work in.
Fig. 2, Sheet 1, is a view of the lever C drawn back and the chock down, also the
gripes free by the bolts being drawn. Fig. 2, also shews that this invention has
the advantage of being used for standards on deck.
Fig. 3, Sheet 2, is a view of the two sides of the skid which are made of suitable
metal and are deep enough to allow sufficient drop for the centre part of the chock
to bring the upper edges of the side parts of the chock level with the top of the
skid as shewn in Fig. 2. G is a hook of suitable length connected to the lever C
for hooking in the eye of the centre-piece X.... X, (Fig. 4) to draw it out; this
hook is made with a tongue, as shewn in the drawing, which meets the edge of the
lever C when the bolts of the chock are drawn, thereby causing G to unhook from
the centre-piece. H is the bar, fitted between the sides of the skid, on which the
lever C works. J, J, are levers with elbows to which are connected, and by which
are worked the pins or bolts which pass through the side of the skid and into the
sockets K, K, for securing the gripes; the levers J, J, are worked together by
being connected by a rod or bar, which is bracketed close to the side of the skid,
and short connections to the levers; and the inner lever being made long enough
to take and be worked by the lever C as shewn in the drawing. L, L, are rollers
fitted in brackets close to the top of the ski for the guides W, W, (Fig. 6,
Sheet 3) to work on. M, M, are shoulders fitted on both sides of the skid to
hold the studs B, B, (Fig. 1 Sheet 1) when the chock falls down. a,.. . u,' are
brackets fitted on both sides of the skid in such a manner that they will take the
bolts P, P, (Fig. 4 Sheet 2). N, N, are guides fitted on to the sides of
the skid in which work the studs 6, 1, (Fig. 4, Sheet 2,) to keep the chock in its
place in the skid, and are made of sufficient length to allow the bolts P, P,
(Fig. 4, Sheet 2) to shoot easily over the brackets 'a.... when the chock has
been elevated to its position (as in Fig. 1, Sheet 1).'n, n," are plates fitted to the
lower ends of the guides N,.. N, to keep the studs b. b. (Fig. 4) from coming
through one end of these plates may be hinged to the guides and the other
secured with a common fastening that they may easily be let go when it is required
to take the chock out of the skid. The cog wheels shown in the drawing are fitted
on a shaft to the side of the skid in the manner usual with engineers and in such a
way that they will work together in the cog-plates A, A, (Fig. 1 Sheet 1) in
raising the chock to its place the cog wheels are worked through the bevelled
cog wheels shewn, by the crank handle at D. The side of the skid in the wake of
the cog wheels may be hollowed or otherwise arranged to allow them to lay in
-closer.
:
Fig. 4, Sheet 2, is a view of the mechanism under the chock by which I work
the bolts P, P, which hold the chock in its place in the skid. A lock is made
of suitable metal and in three parts, being wide enough to contain the bolts and the
mechanism that works them, and the length together being equal to that of the
chock, the length of the centre part being sufficient to contain the middle bolts and
the parts of the mechanism necessary to work them, as shewn in the drawings; the
lock is made of sufficient depth to allow the covers which are hinged at the side to
fit closely on a flanged edge and over the bolt brackets R..... K; slots are made
in the covers for brackets to come through for securing the covers as shewn
(Fig. 6 Sheet 3). The parts of the lock are hinged together. The sides of the
lock are bevelled where the parts are hinged to allow the dropping of the outside
parts of the chock in the skid as far as required (Fig. 2, Sheet 1); the covers of
the lock do not extend over the bevelled parts of the lock (Fig. 6, Sheet 3). The
centre-piece X,... X, in the lock is made in three parts of the shape shewn in the
drawing, and connected together by short couplings which coincide with the hinges
of the lock when the centre-piece is pulled out (as in Fig. 5 Sheet 3); brackets are
fitted to the lock at convenient intervals to keep the centre-piece in its place and
through which it works; one end of the centre-piece comes through one end of the
lock and has an eye in it for G (Fig. 3, Sheet 2) to hook into. A notch is made

page_text: in the centre-piece to receive the spring catch T, when the centre-piece is pulled
out and the bolts P, . . . . . P, are in to keep the centre-piece in that position until
the chock is back to its place again, when, by pressing on the head of the small rod
which comes through the end of the lock and communicates with the spring catch,
the centre-piece is released, and by pushing the end of the centre-piece in, the
bolts P,
.P, are shot back in their places. The bolts P,. ... P, which
work through the side of the lock, are made of one size and in the manner shewn in
the drawings (Figs. 4 and 5, Sheets 2 and 3) and of sufficient length to take the
brackets 'a. a' (Fig. 3, Sheet 2). The diamond parts of the centre-piece,
when it is pulled out, act upon the small levers S, . . . . . S, which draw the bolts
in; and by pushing back the centre-piece the opposite edges of the diamond parts
acting upon the bolts shoot them back to their places; the bolts are supported by
the brackets R, . R, which are fitted strongly to the lock. The heads of the
pins of the small levers S, . S, are made long enough to enter socket holes
in the covers (when closed) to give the pins support. b, b,' are studs fitted on
cach side of the middle part of the chock to work in the guides N,.. N, (Fig. 3,
Sheet 2); these studs may be fitted on to the side of the lock if preferred; also,-
one set of bolts, placed where required, may be used in the side parts of the lock
instead of two sets. The lock being completed, is securely fastened to the corre-
sponding parts of the chock as shewn in the accompanying views.
Fig. 5, Sheet 3, is a view of the lock when the centre-piece is pulled out and the
bolts drawn in.
Fig. 6 Sheet 3, is a view of the covers of the lock closed and fastened; also,-
the other side of the chock shewing the roller guides W, W, in which the
rollers I, I, travel (Fig. 3, Sheet 2); these roller guides are made of suitable
metal with flanged edges sufficient to take the sides of the rollers without touching
their axles or brackets, and are let into the chock the depth required, and also are
of the same shape as the cog-plates on the other side of the chock (Fig. 1
Sheet 1).
When it is required to take the chock out of the skid, the studs B, B, (Fig. 1
Sheet 1) are taken out, one end of each of the plates 'n, n,' (Fig. 3, Sheet 2) is let
go, and the lever C drawn, with the hook G (Fig. 3 Sheet 2) in the eye of the
centre-piece; the chock will then come through the skid free.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
The arrangement of the chocks and gripes and the combinations used in the
working of the same, as herein shewn and described.
Dated this 31st day of March 1892.
FREDERICK WILLIAM JONES.