Improvements. in and relating to Cable: Winches
Year: 1897

page_text: Improvements. in and relating to Cable: Winches:.
I, JOHN EDWIN STEWART of 10 Trowels Lane in. the. County Borough of Derby,.
Electrical Engineer, dó hereby declare the nature of this invention, to be as
follows:-
The object of my invention is to provide an improved winch for: drawing electric,
cables or the like through underground conduits aud otherwise hauling upon the said:
cables or the like without unduly straining the same..
My improvements consist in providing an automatic. locking arrangement of the
gear when a certain predetermined stress has been exerted on. the cable, and an
adjustable guidé pulley for leading the cable out of the cable ways or ducts.
In carrying out my invention I provide suitable framework and gearing somewhat
similar to those of an ordinary crab-winch, the whole may be mounted upon wheels.
and adapted for being placed upon the pavement; roadway: ore the like. over the
inspection chambers or junction boxes through which the electric cables pass. Ones
of the gear wheels, preferably the largesti spur: wheel, is-keyed ion to the cable drum:
shaft near one end of the said shaft, the latter is mounted at the opposite end.in: a
swivel bearing and at the spur wheel end is fixed in or to a sliding block: which is:
held in position by a spiral or other spring.
:
When the given stress or pull on the cable and consequently upon the drum in: a
downward direction is exceeded the shaft is pulled down, the spring is compressed
and the large spur wheel slips half out of gear: with.its: fellow at one end-of. a
diameter and into gear with a rack, fixed to the. lower part of the frame, at the.
opposite end of the diameter; thus the whole mechanism is locked until: the strain!
is relieved.
Any suitable means may be employed for adjusting the tension of the spring; and,.
it will be evident that: the use of this part of my invention need. noti necessarily be
confined to underground cables.
Upon a shaft or other fixed support near the bottom of the framing is secured: ar
clamp carrying an adjustable depending arm or bar of any. convenients length,.this
arm or bar carries a grinding pulley at its lower extremity round which the. cable:
passes from the conduit to the drum, the bar can be raised: or: lowered through thes
clamp, and secured in any desired position, and, being capable of any adjustment. in
a radial direction by means of the clamp on the shaft, the said guiding pulley, may
be placed in any désired position in relation to the winding drum.
Jhin 10th dow of July 1997

page_text: Improvements in and relating to Cable Winches.
I, JOHN EDWIN STEWART of 10 Trowels Lane, in the County Borough of Derby,
Electrical 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 :-
The object of my invention is to provide an improved winch for drawing electric
cables and the like through underground conduits and otherwise hauling upon the
said cables or the like without unduly straining the same.
My improvements consist in providing an automatic locking arrangement of the
gear when a certain predetermined stress has been exerted on the cable, and an
adjustable guide pulley for leading the cable out of the cable ducts or ways.
In describing my invention reference will be had to the accompanying sheet of
drawings, similar letters of reference upon which indicate corresponding parts.
Figure 1 is a side elevation of a winch constructed according to my invention.
Figure 2 is an end elevation of the same.
In carrying out my invention I provide suitable framing A A² A² and gear B B¹
somewhat similar to those of an ordinary crab winch, the whole may be mounted
upon wheels C and adapted for being placed upon the pavement, roadway or the like
over the inspection chambers or junction boxes through which the electric cables
pass. One of the gear wheels, preferably the largest spur wheel B', is keyed on
the cable drum shaft D near one end of the said shaft, the latter is mounted at the
opposite end in a swivel bearing E and at the spur wheel end is fixed in or to a
sliding block F which is held up in position by a spiral or other spring G.
When the given stress or pull on the cable and consequently upon the drum H in
a downward direction is exceeded the shaft D is pulled down, the spring G is compressed
and the large spur wheel B¹ slips half out of gear with its fellow at one end of a
diameter and into gear with a rack I fixed to the lower part of the frame A¹, at the
opposite end of the diameter; thus the whole mechanism is locked until the strain is
relieved. The rack I is shewn by dotted lines upon Figure 1 as it would appear on
the inside of the framing A¹.
Any suitable means may be employed for adjusting the tension of the spring such
as the nuts K K¹; and it will be evident that the use of this part of my invention
need not necessarily be confined to underground cables.
Upon a shaft L or other support near the bottom of the framing is secured a
clamp M M¹ carrying an adjustable depending arm or bar N of any convenient length,
this arm or bar carries a guiding pulley O at its lower extremity round which the
cable passes from the conduit to the drum, the bar N can be raised or lowered through
the clamp and secured in any desired position by tightening the clamping screw P,
and being capable of any adjustment in a radial or lateral direction by means of the
aforesaid clamp, the said guiding pulley may be placed in any desired position in
relation to the winding drum.
The side framing A¹ is broken away on the left hand side of Figure 1 for
convenience in shewing the clamp and shaft behind it.
i
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 a cable winch the employment of a shaft carrying the cable drum and one of
the gear wheels the said shaft being mounted in a swivel bearing at one end and
fixed in or to a sliding block at the other, the said gear wheel on the shaft being set

page_text: up to its fellow by means of a spring and being adapted to be half disengaged
therefrom and engage a fixed rack substantially as and for the purposes described.
2. In a cable winch the employment of a guiding pulley carried at or near the
lower extremity of a vertically adjustable arm depending from a clamp fixed to a
support or shaft on the framing of the winch, the said guiding pulley being also
capable of radial and lateral adjustment by means of the clamp substantially as and
for the purposes described.
Dated this 20th dow of T... 1005
W. SWINDELL,
Imperial Chambers, Albert Street, Derby, Agent for the Applicant.