Improvements in and relating to Hoisting Mechanism.
Year: 1896

page_text: Date of Application, 9th June, 1896-Accepted, 18th July, 1896
COMPLETE SPECIFICATION.
Improvements in and relating to Hoisting Mechanism.
A communication from abroad by ANNIE FRANCES REGAN, Widow of Daniel S.
Regan, residing at 219 Harrison Street, in the City of Brooklyn, County of
Kings and State of New York, one of the United States of America.
I, CHRISTIAN ALBERT JENSEN, of No. 77 Chancery Lane, London, Chartered
Patent Agent, 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 :-
My present invention relates to an improved hoisting mechanism. The invention
has for its objects the adaptation of a new and improved form of reduction gearing
for use for the purpose specified, so that the high speed of the driving shaft, which
may be the armature-shaft of an electric motor or some other high-speed prime-
mover, may be reduced to a lower speed in the hoisting drum when rotating at a
given ratio, the same depending upon the proportions of the different gears and
their relation and combination with respect to each other. Said novel form of
reduction gearing just referred to has been made the subject of Letters Patent of
the United States, granted to Daniel S. Regan, September 10, 1895, No. 546,249,
and entitled an Improvement in Power Transmitters. The invention set forth and
claimed in this application is therefore a carrying forward and adaptation of the
invention described in said patent. It must be understood, however, that the
combination described in the present application is not necessarily to be restricted
to use in a hoisting mechanism, but may have a variety of uses. The present
invention therefore consists essentially in the construction, arrangement and
combination of parts, substantially as will be hereinafter described and claimed.
Referring to the accompanying drawings, I have illustrated therein one
preferred embodiment of my invention, the same being sufficient to explain the
principles thereof and enable those skilled in the art to make and use the invention,
and it will be understood that the details of construction and the arrangement of
parts may be varied to suit the exigencies of different cases, and that parts of my
invention may be used separately or in combination, or in combination with other
equivalent parts, without departing from the spirit of my invention.
In the drawings, therefore-
Figure 1 is a longitudinal vertical sectional view of my improved hoisting
mechanism.
Figure 2 is a cross sectional view on the line x x of Figure 1, and shows the
relative arrangement of a part of the gear wheels.
Figure 3 is a cross-sectional view on the line y-y of Figure 1, and shows the
relative arrangement of another part of the gear wheels.
Similar letters of reference designate corresponding parts throughout all the
different figures of the drawing.
A and B denote two separate standards mounted upon some suitable bed or
platform, and having their upper ends formed with the horizontal shaft bearings a
and respectively, which bearings are in horizontal aligument with each other.
C denotes a horizontal drum or cylinder, on which is adapted to be wound a
suitable rope or cable for hoisting purposes, the drum being flanged or otherwise

page_text: fashioned in any ordinary and suitable way for holding the rope. This drum or
cylinder is provided on one side, as for instance, the right hand side, as shown in
Figure 1, with a cover plate C (which may, if desired, be an integral side) having
a central, integral, horizontal, sleeve-like trunnion or journal c that is supported in
the bearing a and is arranged to rotate in said bearing. To the opposite side of
the drum or cylinder C is attached a wheel F, which is preferably outside the
flange of the drum or cylinder, and is formed integral with a sleeve-like trunnion
or journalf that is supported and revolves within the bearing b.
Another wheel G, similar to wheel F and having the same diameter, is situated
close to the outer end of the bearing 6 opposite to where the wheel F is located,
and wheel G is made integral with or is securely attached to a horizontal shaft g
which passes through and is supported revolubly within the hollow trunnion or
journal f, the opposite end of shaft g being within the drum C and having formed
integral with it a wheel l, which is either formed with gear teeth, or else has a
gear-tooth rim like L secured thereto, as shown in Figure 1, so that an external
gear wheel may thus be provided, situated within the drum C, and integral, as it
were, with the wheel G, inasmuch as it is integral with the shaft g to which the
wheel G is fastened, or with which it is made integral, and hence any movement
of the gear wheel L will be transmitted simultaneously to the wheel G, and
reversely, any stoppage of the wheel G will simultaneously cause the wheel L to
be brought to a stand-still.
Still another wheel R, similar to the aforesaid wheels F and G having the same
diameter, is situated close to the outer end of the bearing a opposite to where the
cover plate C is located, and this wheel R is made integral with, or is securely
attached to a horizontal shaft R', which passes through and is supported revolubly
within the hollow trunnion or journal e before mentioned, the opposite end of this
shaft R being within the drum C and having formed integral with it a wheel
which lies alongside of the cover plate C. The wheel is either formed with
integral gear-teeth, or else has a gear-tooth rim secured thereto, as shown in
Figure 1, so that an internal gear wheel L' may thus be provided, situated with
the drum C and integral, as it were, with the wheel R, inasmuch as it is integral
with the shaft R' to which the wheel R is fastened, or with which it is made
integral, and hence, any movement of the internal gear L' will be transmitted
simultaneously to the wheel R, and reversely any stoppage of the wheel R will
simultaneously cause the internal gear wheel L to be brought to a stand-still.
D indicates a driving shaft, which is adapted for rotation by any suitable kind
of motor. It may be the armature-shaft of an electric motor, or it may be any
other kind of high-speed shaft. This shaft D is supported within a tubular
recess or bore that runs through the shaft R', and also within the tubular recess g¹
in the shaft g, said shaft D passing centrally through the drum C. The recess g
may pass partially or entirely through the shaft g. The recess g' therefore serves
as a bearing for the end of the drive shaft D.
On the shaft D is an eccentric E which is located centrally within the drum C.
On this eccentric E is a combined external and internal gear wheel cousisting of
the web H, on one side of which is the internal gear rim I and on the other side
of which the external gear rim J, said internal gear wheel I meshing with the
external gear wheel L already referred to, and said external gear J meshing with
an internal gear wheel K which is attached to and forms a part of the drum C, all
as clearly shown in Figure 1. The combined external and internal gear wheel
just referred to is therefore mounted upon and driven by the eccentric E. It will
thus be seen that the several gear wheels just mentioned are enclosed entirely
within and protected by the drum C. The combined external and internal gear
wheel H I J, although eccentric to the axis of revolution of the shaft D, is
concentric with the eccentric E. Furthermore, on the shaft D, contiguous to the
eccentric E, is a second similar eccentric E', whose eccentricity extends in a
direction the reverse of the eccentricity of the eccentric E, that is to say, while
the point of the eccentric E extends upward, the point of the eccentric E¹ will

page_text: extend in the opposite direction, or downward. On the eccentric E' is another
combined external and internal gear wheel, consisting of the web H, on one side
of which is the internal gear rim I', and on the other side of which is the external
gear rim J, said internal gear I meshing with the external gear wheel K' which
is attached to or is integral with the drum C at a point proximate to the internal
gear wheel K, and which therefore forms a part of the drum C. The external
gear J meshes with the internal gear wheel L' already referred to, which has
been described as made integral with the hollow shaft R, to which the wheel R is
attached. It will thus be seen that the second combined external and internal
gear wheel H I J is mounted upon and driven by the eccentric E', and although
eccentric to the axis of revolution of the shaft D, is concentric with the
eccentric E.
From the foregoing description, it will be perceived that the hoisting drum C is
provided with an interior, integral, internal gear wheel and also with an interior,
integral, external gear wheel; that within the drum C is an external gear wheel
which is connected rigidly with an outside wheel G, and also an internal gear
wheel that is connected rigidly with another outside wheel R; that a combined
external and internal gear wheel mounted upon and driven by an eccentric on
the driving shaft meshes with the said inner external gear wheel, and the internal
gear wheel on the drum; and that a second combined external and internal gear
wheel mounted upon and driven by a second eccentric on the driven shaft
meshes with the aforesaid inner internal gear wheel and the external gear wheel
integral with the horizontal drum. A balance of some suitable kind is often
found of great importance in making the movement of the gear steady and
uniform, and avoiding those irregularities and jerks which strain and damage
the machinery, it being especially valuable when the gearing is employed with
a high-speed prime-mover such as an electric motor, and therefore I reserve the..
liberty of employing such a balance in the present combination whenever and
wherever it may seem desirable and useful. To each of the wheels F, G, and R,
which wheels for the sake of simplicity I denominate brake wheels, is applied
some suitable form of brake strap, so that the operator, by manipulating the
same, can tighten the strap upon the periphery of one wheel or the other as
the case may be, and thereby stop the wheel. I do not intend to be restricted
to any particular kind of strap, any particular kind of operating device, or any
particular species of brake, but reserve the liberty of employing such forms as
may be deemed most suitable.
The operation of my improved hoisting mechanism is as follows:-Suppose,
for instance, that a brake is applied to the wheel G, and said wheel is consequently
caused to remain stationary, then likewise the gear wheel L will remain stationary.
Now as the shaft D rapidly revolves, power will be communicated through the
eccentric E, the combined external and internal gear wheel H I J revolving
loosely upon and driven by the eccentric E, and the gear wheels L and K with
which the combined external and internal gear H I J engages as aforesaid to
the drum C, and said drum will consequently revolve at a rate of speed reduced
below the speed of the shaft D and in a direction of motion opposite to that
in which the shaft is revolving, and evidently the wheel F which is attached
to the drum C will partake of the same reversed and reduced movement. While
this operation of the parts specified is progressing, it will be obvious that the
brake wheel R, the second eccentric E and the second combined external and
internal gear wheel H I J will be revolving idly accomplishing no work at
this time. If, however, the brake be released from the wheel G, and a brake
be applied to the wheel R, then the internal gear wheel L' will become stationary.
and fixed in like manner as did the gear wheel L before. Now as the shaft D
rapidly revolves, power will be communicated through the eccentric E¹, the
combined external and internal gear wheel H I J revolving loosely upon and
driven by the eccentric E¹, and the gear wheels L' and K' to the drum C, and,
said druin will consequently revolve at a rate of speed reduced below the speed"

page_text: of the shaft D and in a direction of motion the same as that in which the
shaft D is revolving. Thus it will be evident that by applying the brake to
one of the wheels, as G, the hoisting drum may be caused to run at a slower
rate of speed in one direction, and then by applying the brake at another time
to another of the wheels, as R, the hoisting drum may be caused to run at a
reduced rate of speed in the opposite direction. If at any time we
apply the
brake to the wheel F, and release the brake from the wheel G or the wheel R,
as the case may be, to which it has been previously applied, the result will be
that the drum C will be held stationary, and therefore both sets of eccentrics
and combined external and internal gear wheels will run idly accomplishing for
the time being no particular function with reference to the movement of the
drum. It will be obvious that I might construct my improved hoisting machine
with a reversal of the parts from what is specifically herein shown; that is to
say, I might substitute an external gear for an internal gear wherever the latter
is found, and an internal gear for an external gear wherever the latter is found,
and the resulting combination would be exactly the same as it is in the present
example with the exception of the reversal, such reversal being, of course, the mere
mechanical equivalent, and effecting no change in the combination, operation or
function of the various parts.
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. The combination of a revolving cylinder having hollow journals on each
side, an external gear wheel and also an internal gear wheel, both on the inside
of said cylinder, bearings supporting said cylinder journals, a shaft supported
and revolving within the bollow journals of the cylinder, two eccentrics fixed
on said shaft, a combined-external-and-internal-gear-wheel revolving upon each
of the eccentrics and driven thereby, an internal gear wheel on
supported in one of the cylinder journals and engaged by one of the combined-
external-and-internal-gear-wheels, and an external gear wheel on a shaft supported
in the other cylinder journal and engaged by the other of the combined-external-
and-internal-gear-wheels, substantially as described.
a shaft
2. The combination of a hoisting cylinder having hollow journals on each
side, an external gear wheel and also an internal gear wheel, both on the inside
of said cylinder, bearings supporting the cylinder journals, a shaft supported
and revolving within said journals, two oppositely-projecting eccentrics fixed on
said shaft, two combined-external-and-internal-gear-wheels, one mounted on each
eccentric, an external gear wheel having a shaft supported in one of the
cylinder journals, with which external gear wheel one of the combined gear
wheels engages at the same time that it engages one of the gear wheels of
the cylinder, a brake wheel on the aforesaid shaft of the external gear wheel,
an internal gear wheel having a shaft supported in the other cylinder journal,
with which gear wheel the other combined gear wheel engages at the same time
that it engages the other gear of the cylinder, a second brake wheel secured to
the aforesaid shaft of the internal gear wheel, substantially as described.
3. The combination of a hoisting cylinder having hollow journals on each side,
an interual gear wheel and also an external gear wheel, both on the inside of
said cylinder, bearings supporting the cylinder journals, an external gear wheel
within the cylinder having a hollow shaft situated within one of the cylinder
journals, a brake wheel secured to said hollow shaft, an internal gear wheel
situated within the cylinder and having a hollow shaft supported within the
other cylinder journal, a brake wheel secured to the end of said hollow shaft,
a 'brake wheel secured to the cylinder, a drive shaft supported in the aforesaid
two hollow shafts, two oppositely projecting eccentrics fixed on the said drive
shaft, two combined-external-and-internal-gear-wheels mounted upon and driven
by the said eccentrics one of said combined wheels engaging the internal gear

page_text: wheel on the cylinder and the external gear wheel within the cylinder, and the
other of said combined wheels engaging the external gear of the cylinder and
the internal gear within the cylinder, substantially as described.
Dated this 9th day of June 1896.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.