Improvements in Apparatus for Raising and Lowering Ships' Boats.
Year: 1898

page_text: Date of Application, 16th Mar., 1898
Complete Specification Left, 16th Dec., 1898-Accepted, 16th Mar., 1899
Improvements in Apparatus for Raising and Lowering Ships' Boats.
I, WILLIAM McQuoin, Jr., of 9, Roxburgh Street, Greenock, Renfrewshire,
Joiner, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in apparatus for raising and lowering
ships' boats.
In carrying out the invention T fit in connection with each davit a winding
drum on which the lower tackle can wound. These drums are mounted upon a
shaft or shafts driven by means of bevel or other gearing from a vertical shaft
with a worm wheel thereon which is operated by a worm on a cross driving shaft
provided with a wheel or crank and handle. Fitted in connection with the
drum shaft is a band brake and operating lever.
In order to throw the driving shaft into and out of gear a worm shaft is pro-
vided which operates two screwed shafts working in the bearings of the driving
shaft. These bearings are made so as to move or slide backwards and forwards
on a frame or guides. If desired a clutch shifting gear may be used instead of
the worm shifting gear hereinbefore described.
The davits can be turned in their sockets by means of one or more shafts which
when operated are caused to turn, by means of worms, worm wheels attached to
the davits. Two operating shafts may be provided. The worm wheels may be
made in segments or halves and be bolted to or strapped to the davits.
To guide the tackle on to the drums, swivelling guide pulleys may be used.
Dated this 15th day of March 1898.
Improvements in Apparatus for Raising and Lowering Ships' Boats.
I, WILLIAM MCQrom, Jr., of 9, Roxburgh Street, Greenock, Renfrewshire,
Joiner, 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 to improvements in apparatus for raising and lowering
ships' boats.
And in order that my said invention may be properly understood I have here-
unto appended an explanatory sheet of drawings whereon,
Fig. 1 is a side elevation of the apparatus.
Fig. 2 is a plan of the apparatus.

page_text: Fig. 3 is a section taken on the line X-X Fig. 2.
Figs. 4 and 5 are detail views.
Referring to the drawings whereon the same reference letters wherever repeated
indicate the same parts.
In carrying out the invention I fit in connection with each davit a a winding drum
on which the lowering falls can be wound. These drums e, c¹, are mounted
upon a shaft driven, by means of bevel gearing e, from a vertical shaft f with
a worm wheel g thereon which is operated by a worm h on a cross driving shaft i
provided with a hand wheel j, or a crank and handle. Fitted in connection with
the drum shaft d is a band brake k with operating screw k¹. The band is hinged
at (see Fig. 4) and when the screw is operated the said band is forced into
frictional contact with the wheel on the shift d so as to brake it. If so desired
an ordinary band brake and lever may be used.
In order to throw the driving shaft into and out of gear, whenever necessary,
a worm shaft 7 is provided having two worms 1, 2, on it which operate two
screwed shafts m, m³, working through the bearing blocks o, o, of the driving
shaft. These bearing blocks are made so as to move backwards and forwards on
guides carried by the supports q. If desired a clutch shifting gear may be
used instead of the worm shifting gear hereinbefore described.
The davits a can be turned in their sockets so as to throw the boat inboard or
out-board by means of the shafts r, rl, which, when operated, are caused to turn,
by means of worms s, s', worm wheels t, t¹, attached to the davits. The worm
wheels t,, may be made in segments or halves (see Fig. 5) and be bolted to or
strapped to the davits as shown.
The shafts r, r, are operated by the bevel gears u, u, actuated by the shafts v, v,
Each shaft r, as shown, carries at its upper end a worm wheel we which gears with
a worm .r. Each worm is carried by a shaft y and each shaft y is operated
by a hand wheel y or a crank and handle.
To guide the falls on to the drums, swivelling guide pulleys may be used.
Each rope or fall b is, as shown, passed over guide pulleys b¹, b¹, b¹, on each
davit, to the hook or shackle b at the boat B.
If desired a single drum may be fitted on the shaft and upon this drum both
ropes may be wound.
The parts of the apparatus may be arranged in different ways to suit the various
types of vessels and the space available for the apparatus.
represents the ship's rails.
Having row particularly described and a certained the nature of my said inven-
tion and in wint manner the same is to be performed I declare that what I
consider noval and desire to claim is;.
г
-
The combination of parts constituting the apparatus for raising and lowering
ships houts all substantially as hereinbetore "described with reference to the
drawings annexed.
Dated this 15th day of December 1898