Improvements in and relating to Power Transmitters.
Year: 1896

page_text: Date of Application, 14th Apr., 1896-Accepted, 20th June, 1896
COMPLETE SPECIFICATION.-
Improvements in and relating to Power Transmitters.
A communication from abroad by PATRICK EGAN, a citizen of the United States
of America, of 68 and 70 Nassau Street (Sheldon Building), in the City,
County, and State of New York, one of the United States of America,
Gentleman.
I, PETER 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:
These improvements refer to a power-transmitter for transferring motion from
one point to another at a reduced speed, or at an increased speed, and if desired, in
a reverse direction, the same being applicable to various kinds of machines, such
as are used in shops of various kinds, or being applicable to other kinds of mechanism.
too numerous to mention.
The invention has for its object the adaptation of a new and improved form of
reduction gearing for use in the connection specified, so that the high speed of a
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 driven element.
when rotating at a given ratic, the same depending upon the proportions of the
different gears and their relation and combination relatively to each other; or so
that a low-speed prime-mover may be used to drive a high-speed dynamo.
The invention, therefore, consists essentially in the construction, arrangement.
and combination of parts, substantially as will be hereinafter described and then.
more particularly pointed out in the ensuing clauses of claim.
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 arrangement of parts may be
varied to suit the exigencies of different cases without departing from the spirit of.
my invention.
In the drawings-
Figure 1 is a vertical, cross-sectional view of my improved power-transmitter
with certain parts shown in elevation.
Figure 2 is a side elevation of the same.
Figure 3 is a cross-section on the line x-x of Figure 1.
Similar letters of reference designate corresponding parts throughout the different
figures of the drawing.
A designates a circular casing or chamber which is mounted in a stationary
situation upon some suitable bed plate P. I denominate said circular casing an oil
casing, because it is adapted to contain a certain amount of lubricating material, and
since a gearing mechanism is located inside of casing A, this gearing will operate.
within the lubricant, and hence run noiselessly, besides being kept thoroughly oiled.
The stationary casing A is provided at its central point on one side, with a hori-
zontal shaft bearing A¹ which is preferably integral with the casing A. The
opposite side of casing A is closed by means of a circular plate B serving as a cover

page_text: for the casing said plate being secured in position by means of screws, bolts, or
other fastening devices, and being removable when desired, in order to allow access
to the interior of casing A. The cover plate B is provided at its central point
with a horizontal, integral, stationary shaft bearing b, the axis of which is in
alignment with the axis of the other shaft bearing A, although the bearings them-
selves may be of different sizes or diameters, if preferred. Accordingly it will be
seen that the stationary, circular casing A, besides acting as an enclosing chamber
to receive a gear mechanism and surround the same with lubricating material, serves
also to provide a bearing on each of its sides for sustaining and holding the driving
shaft and the driven shaft, one or both.
D denotes a shaft which may be a driving shaft or a driven shaft, as the case may
be, which is supported horizontally within the shaft bearing A', a bushing a' being
preferably interposed between the shaft D and the bearing A. Within the other
shaft bearing-b is situated a shaft C, which may be a driving shaft. or a driven
shaft, as the case may be, and between which and the bearing b is preferably inter-
posed a sleeve or bushing a, as clearly shown in Figure 1. The shaft C extends
entirely through the bearing b, if preferred, and may be made considerably longer
and of considerably greater diameter than the bearing A, and the end of the
shaft C which projects beyond the bearing bis preferably reduced in diameter, as
at c, so as to correspond more nearly with the diameter of the shaft D. Further-
more, it must be observed that the shaft C is formed with a recess C¹, which
provides a sort of step or cup bearing, and in this recess euters loosely and revolvably
the end of the shaft D, there being preferably a bushing d interposed between the
shaft D and the wall of the recess C, as shown in Figure 1.
On the shaft D at a point centrally within the stationary casing and standard is
an eccentric E. On this eccentric, revolving loosely, and driven thereby, is a
combined external and internal gear wheel, consisting of a web F, on one side of
which is an internal gear wheel G, and on the other side of which is an external
gear wheel H. The internal gear wheel G engages the teeth of an external gear
wheel J, which is secured rigidly to the interior wall of the casing A or to a
flange K integral with said interior wall of the casing A. The external gear
wheel H of the combined internal and external gear engages the teeth of an internal
gear wheel I which is attached to or is made integral with a plate L that is integral
with the recessed shaft C above described. Furthermore, on the shaft D, prefer-
ably at a point between the bearing A' and the eccentric E, is placed a suitable
counterbalance L; the function of which is to secure a uniformity of motion and
speed when the mechanism is running at a very high velocity. Also it is to be
observed that I preferably interpose a bushing / between the eccentric E and the
combined internal and external gear wheel.
In speaking of the operation of my improvements it will be understood that
power may be applied to the shaft D, in which case, shaft D will be the
driving shaft and shatt c the driven shaft, or power may be applied to the shaft c,
in which case shaft e will be the driving shaft and shaft D will be the driven
shaft.
When power is applied to the shaft D, the result will be as follows:-As the
shaft D revolves, the fixed eccentric E thereon will actuate the combined internal
and external gear wheel, which, as we have seen, engages the stationary external
gear wheel on the interior of the stationary casing and standard A, and inasmuch
as the combined internal and external gear wheel likewise engages the teeth of the
internal gear wheel I, which, because of its construction, moves in unison with the
driven shaft c, the result will be that the driven shaft c will be reduced in speed
below the rate of rotation of the driving shaft D and will revolve in the same
direction, the gearing which I have described effectuating this result in the most
approved and satisfactory manner.
When c is the driving shaft, and power is applied thereto, the same operation of
the gearing will take place, and the shaft D will have its speed increased in conse-
quence above the speed of shaft c.

page_text: 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 a power transmitter, the combination of a stationary oil-tight casing and
standard having shaft bearings on the opposite sides thereof, a driving shaft
supported in one of said bearings, an eccentric fixed on said shaft and revolving-
therewith, a combined external and internal gear wheel revolving upon and driven
by the eccentric, a driven shaft supported in the other shaft bearing and having a
recess in oue end receiving the driving shaft, a-gear wheel on said-driven-shaft:
engaging one of the gears of the combined gear wheel, and a stationary gear wheel
on the interior of the stationary casing engaging the other one of the gears of the
combined gear wheel, substantially as described.
2. In a power transmitter, the combination of the stationary oil-tight casing and.
standard having shaft bearings on opposite sides thereof, a driving shaft supported
in one of said bearings, an eccentric fixed on said shaft and revolving therewith, a.
combined external and internal gear wheel revolving upon and driven by the-
eccentric, a driven shaft supported in the other shaft bearing and receiving the
driving shaft in one end thereof, a gear wheel on said driven shaft engaging
the external gear of the combined gear wheel, and a stationary external gear wheel
on the interior of the casing engaging the internal gear of the combined gear wheel,
substantially as described.
Dated this 14th day of April 1896.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.