Improvements in Winding Gearing.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Winding Gearing.
I, CHARLES ARTHUR ALLISON, of 52, Chancery Lane, London, in the County
of Middlesex, Patent Agent, do hereby declare the nature of this invention
(which has been communicated to me from abroad by the Parke and Lacy Com-
pany, a Corporation of the City and County of San Francisco, in the State of
California and United States of America) to be as follows:-
This invention relates to an improvement in winding gearing such as is em-
ployed at pit heads and for analogous uses, wherein a hoisting rope, or ropes, are
wound upon a drum, and to a means of avoiding oblique strains upon the wind-
ing drum and other parts connected therewith.
The invention consists in a travelling pulley, or pulleys, that move parallel to
the axis or face of the winding drum, disposing the convolutions of the winding
rope theroon, naturally, with a definite pitch corresponding to the drum's revo-
lution without lateral stress or deviation.
It also consists in means to move the traversing guiding pulley, or pulleys,
positively, in one or both directions in respect of the winding drum's revolution,
such means consisting of chains, screws, or other devices, actuated from the axis,
or shaft of the winding drum or in conformity with the revolution thereof.
Dated this 28th day of September 1898
ALLISON BROS.,
Agents for the Applicant.
Improvements in Winding Gearing.
.I, CHARLES ARTHUR ALLISON, of 52, Chancery Lane, London, in the County
of Middlesex, Patent Agent, do hereby declare the nature of this invention
(which has been communicated to me from abroad by the Parke and Lacy Com-
pany, a Corporation of the City and County of San Francisco, in the State of
California and United States of America), and in what manner the same is to
be performed, to be particularly described and ascertained in and by the follow-
ing statement:-
My invention relates to winding machinery and gearing such as is employed
at pit-mouths and like places for hoisting loads and to an improved method of
constructing and operating such machinery and gearing.
My improvements consist in so constructing such machinery and gearing that
077

page_text: the hoisting rope when being wound will be directly guided in a true helical
path around the drum by means of a guiding pulley, or pulleys mounted on a
carriage that moves parallel to the axis and face of the winding drum; such
guiding pulley or pulleys being so connected to the winding drum as to produce
coincident motion of the two and thus determine the pitch, or space between the
convolutions of the rope as it is wound.
The objects of the invention are to attain true helical winding of the rope and
thus avoid rubbing and abrasive wear of the rope by the convolutions thereof
rubbing against one another. To avoid oblique strains upon the operating parts
and the framing supporting these. To enable the employment of longer wind-
ing drums of less diameter consequently moving at a higher rate of rotation and
causing proportionately less resistance to the motive apparatus when the latter
is directly connected to the drum shaft. Also other useful objects hereinafter
specified.
To the attainment of these objects I construct winding gearing as shown in
the drawings herewith, constituting a part of my specification, in which drawings
Figures 1 and 2 are side and front elevations, respectively, of winding gearing
constructed according to my invention.
Figure 3 is a plan view of the same gearing, drawn to a larger scale than
Figures 1 and 2.
Figure 4 is a plan view of similar gearing adapted for winding on a conical
drum to compensate for the weight of a long rope wound thereon.
Figure 5 is a diagram illustrating the oblique strains and other impediments
to winding gearing when operating in the usual manner and without my im-
provements.
Similar numerals of reference are employed to designate corresponding parts
in the different figures of the drawing.
Referring first to the diagram Fig. 5 where 1 is the winding drum, 2 the pit-
head pulley, 3 the rope and 4 the mouth of a pit or shaft, this illustrates the
oblique path and strains encountered in direct winding, when the axis of the
drum is set at a right angle to the course of the rope, or normal to the pit-mouth,
and clearly shows the objections which it is the object of my invention to avoid.
Referring next to Figures 1, 2 and 3, 5 is the pit-head, or gallows' frame, to
support the pulley 2; 6 is a frame to support the guiding pulley 7; 8 and 9
illustrate cranks of a steam engine, the common means of driving winding
drums.
10 is a movable carriage on which the guiding pulley 7 is mounted, 11 is a
chain to move the carriage 10, arranged to wind on a small drum 12 driven
by a tangent gear wheel 13 meshing into a screw pinion 14 on the shaft 15 of
the drum 1.
A weight 16 is attached to the carriage 10 to maintain some tension on the
chain 11 and to retract the carriage 10 and guide pulley 7, in case the tension
on the rope 3 is not sufficient for that purpose.
Referring to the plan view Fig. 4 this will illustrate my invention applied to
a tapering drum so arranged that the speed of winding is in proportion to the
load being raised including the winding rope, and the resistance of power
required is rendered uniform, or approximately so at all points of the range.
The drawing shows the drum 1 set with its axis in line with the pit or the pit-
head pulley which causes a lateral deviation of the rope as indicated by dotted
lines at 16 such deviation being inconsiderable, but it will be understood such
deviation can be avoided by setting the drum 1 with its axis oblique to and its
face at 17 parallel with the line of the rope leading from the pit-head pulley.
The carriage, which can be mounted on sliding ways, or on rollers as shown,
can be traversed by any kind of suitable gearing connected with and moving in
a definite relation to revolutions of the shaft 15 and the winding drum 1 there-
on; for example; by a screw, or a rack and pinion can be employed. A simple
form of such gearing not liable to accident or derangement is shown.

page_text: It will also be understood that in case the winding rope 3 approaches the
drum 1 vertically, or at a high angle, two guiding pulleys 7 can be employed one
at each side of the rope. In such case the carriage 10 should be moved posi-
tively each way.
These and other modifications rendered necessary by particular circumstances
of use and adaptation do not depart from the nature and purpose of my invention.
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
1 claim is:―
1. A hoisting machine or mechanism, comprising an overhead pulley, a hoist-
ing or winding drum having its axis parallel or approximately so, to the plane
of rotation of said overhead pulley, a hoisting-rope leading from the load over
said overhead pulley to the winding drum, a guide-pulley interposed in the
course of said rope, said pulley being above the winding drum with its rope-
leading face in the vertical plane of the winding side of said drum, and means
for effecting the travel of said guide-pulley, to cause it to traverse the drum in
a line to keep its rope-leading face in the said vertical plane of the winding side
of the drum.
2. A hoisting machine or mechanism, comprising an overhead directing-
pulley, a winding or hoisting drum having its axis parallel, or approximately 50,
to the plane of rotation of said overhead pulley, a hoisting-rope leading from the
load over the overhead pulley to the winding drum, a guide-pulley interposed
in the course of said rope, said pulley being mounted to rotate in the same or
approximately the same plane as the vertical catenary of the rope from the over-
head pulley, and lying above the winding-drum with its rope-leading face in
the vertical plane of the said winding side of said drum, and means for effecting
the travel of said guide-pulley, to cause it to traverse the drum in a line to keep
its rope-leading face in the said vertical plane of the winding side of the said
drum.
3. In a hoisting machine or mechanism provided with a winding or hoisting
drum, a hoisting rope and a pulley, such as a pit-head pulley, interposed to
direct the rope from the load to the drum, a guide-pulley located above the wind-
ing or hoisting drum with its rope-leading face in the vertical plane of the
winding side of said drum, and a traversing mechanism comprising a carriage
on which the guide pulley is mounted, said carriage being mounted to have a
movement in a line parallel with the winding side of the drum, a small winding-
drum, a line from said drum to the carriage, and a gearing for operating the
small winding-drum from the main hoisting drum.
Dated this 10th day of Novembo» 1808