IMPROVEMENTS IN CAPSTANS
Year: 1885

page_text: I WILLIAM HORATIO HARFIELD, of Mansion House Buildings, in the city of
London, Marine Engineer do hereby declare the nature of my invention for
"IMPROVEMENTS IN CAPSTANS to be as follows:-
33
This Invention relates to improvements in the gearing used to drive double
capstans for working cables upon vessels.
In carrying out my invention I arrange the gearing as follows:-
Three mitre wheels are geared together in a horizontal plane; the first one which
I term the "driver" is fixed to a shaft and is rotated by any convenient motive
power; the other two mitre wheels run loosely upon their shafts but can be con-
nected therewith by two clutches; when this is done the two shafts will rotate in
opposite directions and, as each of these shafts is connected by gearing with a
chain wheel or cable holder, it follows that the cable will be hove in by one of the
cable holders and paid out by the other. The two clutches are so arranged that
besides connecting or disconnecting the loose mitre wheels with their respective
shafts they can connect or disconnect the two shafts with or from each other, the
effect of this arrangement being that either one cable may be hove in and the other
paid out as described above, or both may be hove in together, or both may be
veered together, by simply throwing the two clutches in or out of gear with the
mitre wheels or with themselves.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.

page_text: Improvements in Capstans.
I WILLIAM HORATIO HARFIELD, of Mansion House Buildings, in the city of
London, Marine Engineer, do hereby declare the nature of this invention and in
I 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 the gearing used to drive double
capstans for working cables upon vessels.
In carrying out my invention I arrange the gearing as follows:
Three mitre wheels are geared together in the same plane; the first one which
I term the "driver" is fixed to a shaft and is rotated by any convenient motive
power; the other two mitre wheels run loosely upon their shafts but can be
connected therewith by two double clutches.
The two clutches are so arranged that, besides connecting or disconnecting the
loose mitre wheels with their respective shafts, they can connect or disconnect
the two shafts with or from each other.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing in which figure 1 is an eleva-
tion partly in section and figure 2 a plan of a pair of capstans provided with my
improved arrangement of gearing.
a, a¹, are the usual cable holders mounted upon their spindles b, b1; c, c¹, are the
worm wheels and d, d, the worms by which the cable holders are driven;-c, f
and f¹, are the three mitre wheels of my improved gearing, e, being the "driver"
fixed to the shaft g, driven by any convenient power; -f and f¹, are the two
wheels which run loosely on their respective shafts h and h¹, such shafts carrying
the worms d, d¹; i, j, and i¹, j', are the double clutches for connecting and discon-
necting the wheels f, f¹, to and from their shafts h and h', and also for connecting
the two shafts.
By this arrangement when the wheels f, and f¹, are connected by means of their
clutches it will be obvious that the cables will be hove in or paid out together. If
however the clutches i, j, and i, j, are moved so as to connect the two shafts h, h¹
and the wheel f¹, as shewn in the drawing, the effect will be that both cable 3
holders will be revolved in the same direction and one cable will be paid out and
the other hove in according to the direction in which the cables are placed upon
the holders.
If the clutches i, j, and i¹, j¹, are thrown to gear with the wheel of the last
described motion will be reversed.
It will be seen by reference to the drawing that when in their normal or central
position both the wheels f, and f¹, are loose upon their shafts.
3

page_text: 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. The combination with capstans, of bevel wheels and clutches arranged and
operating in the manner and for the purpose herein before described and represented
in the accompanying drawing.