Improvements in and relating to Apparatus for Working Chain Cables.
Year: 1888

page_text: Date of Application, 1st June, 1888
Complete Specification Left, 1st Mar., 1889
Complete Specification Accepted, 6th Apr., 1889
PROVISIONAL SPECIFICATION.
Improvements in and relating to Apparatus for Working Chain
Cables.
I, WILLIAM HORATIO HARFIELD, of Mansion House Buildings, in the city of
London, Mechanical Engineer, do hereby declare the nature of this invention to he as
follows:-
-
This invention relates to improvements in or applicable to capstans for working
chain cables whereby the shaft carrying the driving gear is relieved from torsional
strain when "veering" and "riding."
For this purpose I mount the cable holder on a fixed bollard or riding bitt to which
one portion of the frictional connection is permanently attached, the other portion of
the frictional connection being connected to the cable holder so as to revolve with it.
The driving gear is mounted upon a separate and independent shaft.
By this arrangement for "veering" and "riding" the cable holder is frictionally
connected to the fixed bollard or riding bitt whereby the strains will be taken through
the frictional connection to the said fixed bollard or riding bitt, no torsional strain
coming upon the shaft carrying the driving gear.
For heaving in the cable, the cable holder is disconnected from the riding bitt.
I, WILLIAM HORATIO HARFIELD, of Mansion House Buildings, in the city of
London, Mechanical Engineer, do hereby declare the nature of this invention to he as
follows:-
-
This invention relates to improvements in or applicable to capstans for working
chain cables whereby the shaft carrying the driving gear is relieved from torsional
strain when "veering" and "riding."
For this purpose I mount the cable holder on a fixed bollard or riding bitt to which
one portion of the frictional connection is permanently attached, the other portion of
the frictional connection being connected to the cable holder so as to revolve with it.
The driving gear is mounted upon a separate and independent shaft.
By this arrangement for "veering" and "riding" the cable holder is frictionally
connected to the fixed bollard or riding bitt whereby the strains will be taken through
the frictional connection to the said fixed bollard or riding bitt, no torsional strain
coming upon the shaft carrying the driving gear.
For heaving in the cable, the cable holder is disconnected from the riding bitt.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.

page_text: Improvements in and relating to Apparatus for Working Chain
Cables.
I, WILLIAM HORATIO HARFIELD, of Mansion House Buildings, in the city of
London, Mechanical Engineer, 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 or applicable to capstans for working
chain cables whereby the shaft carrying the driving gear is relieved from torsional
strain when "veering" and "riding."
For this purpose, I mount the cable holder on a fixed bollard or riding bitt to which
one portion of the frictional connection is permanently attached, the other portion of
the frictional connection being connected-to-the-cable-holder so as to revolve with it.
The driving gear is mounted upon a separate and independent shaft.
By this arrangement for "veering" and "riding" the cable holder is frictionally
connected to the fixed bollard or riding bitt whereby the strains will be taken through
the frictional connection to the said fixed bollard or riding bitt, no torsional strain
coming upon tho shaft carrying the driving gear.
For heaving in the cable, the cable holder is disconnected from the riding bitt.
In order to enable my invention to be fully understood, 1 will proceed to describe
how it may be carried out in practice by reference to the accompanying drawings, in
which
Figure 1 represents an elevation, and
Figure 2 a plan of my arrangement where a single cable-holder is used.
Figure 3 is a plan illustrating my invention as applied to two cable holders.
Figure 4 is a section on line x, x of figure 3.
In the arrangement, shown in figures 1 and 2, A represents the cableholder mounted
upon the upper part of the fixed bollard or riding bitt B, the lower part of which
carries and holds the friction plates B'; the other friction plates A¹ are carried by the
cable holder A and revolve with it. These friction plates or surfaces I force together
or separate from one another as required by means of the coarse pitched scrow cut on
the upper end of the bollard B and the screwed nut C working upon it. This nut (
has a lever C which carries a small pawl D upon it; this pawl D can be dropped into
or lifted out of gear with a ring of ratchet teeth D' cast round the upper flange of the
cable holder A. When the cable holder A revolves in the direction of the arrow for
"veering" purposes, it has a tendency to carry round with it the screwed nut C
thereby forcing the friction surfaces together and checking the speed of rotation,
which speed can also be moderated by means of the hand lever C¹ tilf such time as the
pawl D is dropped into gear with the ratchet teeth D¹ when any further pull upon
the cable automatically screws down the nut and gives great friction or connection
between the cable holder and the fixed-bollard B sufficient for "riding" purposes.
The driving gear for heaving in the cable, I mount upon a separate and independent
shaft such as E having a pinion E' gearing with the cable holder A by means of teeth
on the lower flange of the latter; the pinion E' is loose upon its spindle but can be

page_text: connected and disconnected by the clutch F or by other suitable means. By this
arrangement when "veering" or "riding," the clutch F is thrown out of gear as
shown in the drawing and the cable holder A being frictionally connected to the fixed
bollard and base plate B as herein before described, the strains will be taken through
the frictional connection to the said fixed bollard or riding bitt, no torsional strain
coming upon the shaft E carrying the driving gear. For heaving in the cable, the
clutch F must be put into gear and the cable holder disconnected from the riding-
bitt B by screwing back the nut C thereby separating the friction surfaces.
In cases where it is required to work a second cable from the other side of the ship
on a single cable holder, I cut on the upper end of the bollard B a second screw
thread of the contrary hand to the first, namely, left handed-crossing the former, as
shown by the dotted lines in figure 1. By substituting a left handed nut (which also
carries a pawl D similar to that above described for the right handed nut) the
necessary pressure for dealing with the second cable, which is taken to the capstan in
the contrary direction to the first, is provided.
In the arrangement shown in figure 3 where two cables have to be worked at the
same time, I fit two cable holders A A side by side each mounted upon a fixed bollard
as described for the single cable holder. Each cable holder is geared with the pinion
fixed on the driving shaft E, not directly, but by means of an intermediate pinion G
which pinions are carried upon eccentric spindles H and by the partial rotation of
which through the are shown by the arrows I can move the centre of the intermediate
pinions so that their teeth will engage with those on the cable holder, or by the
reverse action I can disengage them or bring them out of gear.
In figure 3 it will be seen that the pinion on the left hand side is shown in gear and
the one on the right hand side is shown out of gear. By this arrangement of eccentric
spindles and intermediate pinions I can disengage either one or both cable holders
entirely from the driving goar.
Having now particularly described and ascertained the nature of my said inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
(1.) In apparatus for working chain cables, mounting the cable holders upon a fixed
bollard, such cable holders having frictional surfaces which can be brought into contact
with other frictional surfaces upon, or held by, the bollard or riding bitt and which
cable holders can be disconnected from the driving gear when "veering” or “riding"
substantially as described.
(2.) The use in combination with the said cable holders of a coarse pitch screwed
spindle and nut with hand lever by which the cable can be "veered," checked and
stopped by hand power, and automatically held for "riding" by means of a pawl
when geared with the cable-holder substantially as herein-before described and
illustrated in figures 1, 2 and 3 of the accompanying drawings.
(3.) The use in combination with the said cable-holders of eccentric spindles turning
within and carrying pinions into or out of gear with the said cable-holders for the
purpose of connecting and disconnecting the driving gear, substantially as described
and illustrated in figures 3 and 4 of the accompanying drawings.
Dated the 1st day of March 1889.
G. F. REDFERN & Co.,
. 4, South Street, Finsbury, London,
Agents for the Applicant.