Improved Means for Disengaging and Replacing the Supports of Boats on Ships and elsewhere.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improved Means for Disengaging and Replacing the Supports of
Boats on Ships and elsewhere.
I, THOMAS WILSON, of 17, Chatsworth Street, Sunderland, in the County of
Durham, Draughtsman, do hereby declare the nature of this invention to be as
follows:-
My invention relates to means for disengaging and replacing when required
the supports or chocks used for holding boats in position on shipboard and else-
where and has for its object to provide simple and handy means whereby the
purpose can be rapidly and easily effected."
The invention consists of a combination of supporting chocks, moving bars,
saddles and operating hand lever, so arranged that on operation of the lever,
the whole gear is withdrawn from its normal position leaving the boat swinging
free upon the davits and ready for lowering and when brought back to position,
a reverse movement of the hand lever, aided by manual or mechanical replacing
of the chocks, secures the boat.
To this end, I provide a pair of bars of suitable section hinged together end-
wise, one is hinged at its outer end to the deck or flooring and the other is at
its outer end free to slide in a hollow guide bracket fixed to the deck or flooring.
A pair of saddles is provided fitting upon and embracing the upper part of the
said bars and pivoted thereto at their outer ends and to each of these saddles
the supporting chocks are hinged transversely.
The operating hand lever is centred in the said hollow fixed bracket and,
provided with a foot cam acting on the end of the bar which slides therein. The
bars, saddles and chocks are normally held in position supporting the boat by
the cam of the hand lever when in one position; when moved to its other
position, the bars are freed and withdrawn by gravity and lie flat on the deck
or flooring the saddles and chocks being then clear of the boat, the chocks are
then turned laterally over and also lie flat and the boat swings clear on the
davit ropes. The return motion of the lever and cam, aided by manual or
mechanical raising of the chocks, returns the bars and all parts to initial positions.
01
January 1807

page_text: Improved Means for Disengaging and Replacing the Supports of
Boats on Ships and elsewhere.
I, THOMAS WILSON, 17, Chatsworth Street, Sunderland, in the County of
Durham, Draughtsman, 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 following is a full and exact description of the construction of apparatus
according to, and operation of my Invention sufficient to enable others skilled
in the art to which it belongs to make use and put the same into practice,
reference being had to the accompanying sheets of drawings making part of
this specification and to the letters and figures of reference marked thereon, like
letters and figures being used to denote the same or corresponding parts through-
out the various views.
66
The object of my said invention is to provide an easy and efficient means of
clearing" ships or other boats from their position in their supporting chocks
so as to be ready to swing outboard to be lowered and of replacing the said chocks.
The essential features which constitute my invention are lowering or dropping
chocks also mechanism for lowering and raising the said chocks.
The principal parts of the apparatus in connection with each end of the boat
which I use in connection with my invention consists as follows:--Lowering
or dropping chocks and hinges for same, saddles on which the chocks are hinged,
supports on which the saddles are hinged, and mechanism for operating same.
The examples of the general arrangements which I adopt for carrying out
this Invention are shewn in the following figures of the drawings hereto annexed.
Figure 1 is an end view of a boat shewing the combination of the parts of
my invention supporting the said boat.
Figure 2 shews the parts in the act of collapsing and leaving the boat.
Figures 5 and 6 also shew the parts in the act of collapsing, on an enlarged scale.
Figure 3 shews the chocks in the position they assume after pulling over the
operating lever and thereby freeing the boat from its supports.
Figure 4. shews a section on an enlarged scale through N. N. on Figure 1.
In reference to the figures.-A. A. are the lowering chocks, which are hinged
to the saddles B. B. by means of the hinges C. D. The said saddles are hinged
to the supports E. and F. respectively at the points G. G. The support E is
hinged to the deck or basement at H. and the support F is hinged to the
support E at J and is free to slide in a bracket at K. The lever and foot
cam L. L. keep the chocks in position for supporting the boat by pressing
against the end of the support F thereby preventing it from sliding outwards.
The foot cam is so shaped that when the supports are down the act of reversing
the lever slides the end of the support F inwards thereby raising the supports
into position ready for "re-placing" the boat.
The action of lowering the chocks is as follows. The lever L. L. is pulled
outward thereby releasing the supports E. F which fall to the deck and in so
doing release the chocks A. A. from the boat as shewn in Figure 2, and over-
turn the chocks by means of the projection M. Figure 4. pressing against the
curved hinge C. The hinged ends G. G. of the saddles fall to the deck alone
with the supports E. F. while the opposite ends of the saddles remain suspended
for a moment until the chocks fall clear of the boat & then in turn fall to the
deck.

page_text: By replacing the chocks and reversing the lever the parts are again ready for
supporting the boat.
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:-
1. In apparatus in connection with ship's and other boats, the combination
of mechanism for lowering or overturning and raising the chocks as herein
set forth.
2. The combination of lowering chocks A. A. and hinges C. C. for the purposes
specified.
3. The combination of lowering chocks A. A. and hinges C. C. and saddles B. B.
for the purposes specified.
4. The combination of lowering chocks A. A. and hinges C. C. and saddles B. B.
and supports E. F. for the purposes specified.
5. The combination of lowering chocks A. A. and hinges C. C. and saddles B. B.
and supports E. F. and the lever and cam L. L. for the purposes specified..
6. The combination of lever and cam L. L. and supports E. F. for the purposes
specified.
7. The combination of supports E. F. and saddles B. B. for the purposes
specified.
8. The combination of supports E. F. and hinges C. C. for the
specified.
purposes
9. The combination of supports E. F. and chocks A. A. for the purposes
specified.
Dated this 19th day of October 1897.