Improvements in Top Sail Hoists, which may be applicable for other purposes.
Year: 1891

page_text: Date of Application, 23rd Dec., 1891
Complete Specification Left, 16th Sept., 1892-Accepted, 22nd Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Top Sail Hoists, which may be applicable for
other purposes.
We, GEORGE MCONIE and JOHN MACONIE, of the firm of G. and J. MOuie,
of Ladyburn Foundry, Greenock, in the County of Renfrew, North Britain,
Engineers, do hereby declare the nature of this invention to be as follows:-
This invention which relates to improvements in top sail hoists which may be
also used for hoisting or lowering other sails or articles has for its object to construct
the said hoists in a simple and more powerful manner than hitherto.
In carrying out our said invention when applied to a single top sail hoist we
provide two side cheeks or frames and connect them to each other by stay rods or
otherwise. The said cheeks are formed with the necessary means for carrying and
supporting the barrel which is formed as a conical barrel with a helical groove for
the hoisting rope or chain; the said barrel derives its motion from a cross shaft
having one or two operating handles and a worm secured to it and carried in
suitable brackets formed on or attached to one of the cheeks.
The said worm gears into a corresponding worm wheel mounted on the barrel
shaft or it may be cast in one with the barrel or attached to it. The whole thus
forming a simple and powerful hoist by the use of which a top or other sail may be
hoisted or lowered by hand and worm gearing.
Or if desired to lower the said hoist by brake power we may provide the barrel
or its shaft with a suitable brake wheel, strap and adjusting mechanism, in which
case the worm would be mounted in such a manner as to permit of it being taken
out of gear with the worm wheel when desired.
Or
Our said invention also relates to the construction of the said hoists as double
hoists, that is having two barrels and worm gear, and if desired two brakes.
both barrels may be driven by means of one worm gear and hand power.
Dated this 22nd day of December 1891.
JOHNSONS,
115, St. Vincent Street, Glasgow, Petitioners' Agents.
COMPLETE SPECIFICATION.
Improvements in Top Sail Hoists, which may be applicable for
other purposes.
We, GEORGE MCONIE and JOHN MACONIE, of the firm of G. & J. McOnie,
of Ladyburn Foundry, Greenock in the County of Renfrew, North Britain,
Engineers, 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 which relates to improvements in top sail hoists, which may also
be used for lowering or hoisting other sails or articles, has for its object to con-
struct the said hoists, whether they be single or double, in a simple manner
and which will work in a more powerful manner than hitherto, as well as with
more safety.
In carrying out our said invention when applied to a single hoist we provide the
hand shaft with a worm which gears into a worm wheel mounted on the barrel shaft
and when applied to a double hoist we provide each of the barrels with a worm
and worm wheel.
But in order that our said invention may be more readily understood, and easily

page_text: carried into effect, we will proceed to describe the same with reference to the
annexed sheets of drawings which illustrate our invention as applied to a double
hoist, and from which it will be easily understood how our invention may be applied
to a single hoist.
Referring to the said drawings,
Figure 1 is a front elevation Figure 2 a section at central cheek, looking outwards
and Figure 3 an end elevation of the double hoist.
We provide three cheeks or frames A and suitably connect them to each other
by stay rods a or otherwise. The said cheeks A are provided with the necessary
means for carrying and supporting the barrels B, B', which are formed as conical
barrels with helical grooves b, formed for the reception of the hoisting ropes or
chains. The said barrels B, B1, derive their motion from their respective cross
shafts C, C, which shafts are provided with one or two operating handles, though
preferably two c, e', as shown, the front handles e of which are provided with fly
wheels c² so as to permit of a higher speed being obtained while lowering. The
said cross shafts C, C, are each carried in suitably shaped brackets a', a formed
on or attached to the main cheeks A in such a manner as to permit of the
worms D, D', gearing with their respective worm wheels E, E' which are mounted
on the shafts, 62 of the barrels though if desired the said wheels may be other-
wise attached to the barrels or cast in one with them. The whole arrangement
thus forming a simple and powerful hoist, by the use of which a top or other sa
or article may be hoisted or lowered by hand and worm gearing, with safety, az i
is practically impossible that the sail or other article can be lowered unless
worm or hand shaft of the barrel used be kept in motion.
Also in accordance with our said invention we may provide the barrel or ba
with a friction lowering device or devices, consisting of a brake wheel, strap
adjusting mechanism, in which case the worm or worms would be mounted in
a manner as to permit of being taken out of gear with the worm wheel or on the
when desired to lower by brake power.
Also if desired a double hoist may be
arranged as to have only one worm gear and hand power arrangement and
desired one brake lowering device.
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 :-
-
1st. In top sail hoists and the like, the worm and worm wheel, or worms and
worn wheels, arranged and operating substantially in the manner as, and for the
purposes, hereinbefore described and shown in the drawings.
2nd. In top sail hoists and the like driven by worm gearing and hand power, the
combination therewith of a brake lowering device or devices, substantially as
hereinbefore described.
3rd. The general arrangement, construction and combination of the various parts
constituting our improvements in top sail hoists, whether they be single or double
hoists, all substantially as, and for the purposes hereinbefore described and shown
in the annexed drawings.
Dated this 15th day of September 1892.
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicants' Agents.