Improvements in Means for Transmitting Rotary Motion.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Means for Transmitting Rotary Motion.
I, JACOB BENJAMINSEN SKEYEN, of Hillsboro, in the County of Traill and State of
North Dakota, United States of America Gentleman do hereby declare the nature of
my invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement and accompanying
drawings:-
My invention relates to improvements in means for transmitting rotary motion and
is designed to take the place of the ordinary cog gearing in transmitting motion.
The object of my invention is to provide a simple and economical device for the
above purpose, which shall be durable in use and reliable in operation.
In the ordinary cog gearing for transmitting motion, a large per centage of the
power exerted is lost by reason of friction and other causes.
There is also great
liability of breakage of the cogs or teeth especially where large driving wheels and
small pinions are employed and vice versa, in cases where it is desired to greatly
multiply the speed or power.
My invention obviates the above and other objections and by it a greater per cent.
of the power applied is utilized than is possible with the ordinary and well known
forms of gearing.
The invention consists in the novel features of construction and new combination of
parts hereinafter fully described and then pointed out in the claims.
In the accompanying drawing-
Fig. 1 represents a side elevation of a device constructed according to my invention
and arranged to drive the cutter bar of a mower or other machine.
Fig. 2 is a sectional view of parts of the same.
Fig. 3 is a perspective view of the pinion or screw and its shaft.
Fig. 4 is an elevation of the driving wheel.
Fig. 5 is a detail view of the driving shaft.
Fig. 6 is a detail view of one of the pressure counteracting projections.
In the said drawing the reference numeral 1 designates the casing or housing
of the driving wheel, consisting of the annular heads 2, 2, and peripheral wall 3.
This casing or the wall 3, thereof, is cut away at 4, and the ends of said wall
turned downward and the side pieces 5, secured therebetween, forming a rectan-
gularly shaped box, which may be provided with a hinged cover 6. The numeral 7
designates the driving shaft passing centrally through the heads 2, 2, and through
a sleeve 8 formed on a plate 9, secured to one of said heads. The driving wheel
has a central hub 10, embracing the driving shaft, and said hub may be provided
with clutch teeth engaging with a sliding clutch on the driving shaft so that the
latter and the driving wheel may be thrown into and out of gear with each other
as is usual in such devices. Said hub is provided with two annular discs or
rims 13. These discs near their peripheries are provided with a series of equi-
distant transverse oblique bars 14, which engage with the grooves 15, of a spiral 16,
on the driven shaft 12, and from the rim or periphery of one of said discs or
rims are projections 17, also engaging with said grooves 15. As shown, the
spiral has four grooves, but it is obvious that more
or less may be employed
without departing from the invention.
As seen in Fig. 1, on the shaft 16ª, is mounted a driving wheel and casing similar to
that above described, and the driven shaft 16 of this device carries a fly wheel 18 and
a crank wheel 19, to which a cutter bar of a mower or other machine may be secured.
It is obvious, however, that this latter device may be dispensed with and the machine
to be operated be driven directly from shaft 12, or that the number of such devices
may be increased as desired.

page_text: The operation is as follows: Power being communicated to the driving shaft, the
driving wheel will be caused to revolve, and the oblique bars engaging with the
grooves in the spiral or screw will cause the latter to be rotated and its motion trans-
mitted to the shaft which drives the machine. At the same time the projections 17 on
the wheel will also engage with the grooves of the spiral and counteract the lateral
pressure on the wheel caused by the action of the said oblique bars.
By my invention a higher and more uniform speed is attained with greater power,
less friction, and less liability of breakage or injury than by the ordinary forms of
gearing, thus producing a more efficient and reliable machine."
The projections 17 for counteracting the lateral pressure on the wheel may
consist of a series of lugs equal in 'number to the oblique bars 14 and are
coincident with one end thereof. As shown in Fig. 6, however, they are preferably
formed of the angular plates 20, having apertures through which pass the ends
of the oblique arms 14, which are secured by nuts 22. These lugs 17 are at
such a distance from the ends of the oblique arms that the space therebetween is
equal to the distance between two of the grooves 15, so that when one of said
arms engages with one of the grooves 15, its corresponding lug engages with the
next succeeding groove.
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 1
claim is :-
.
As means for transmitting motion the combination with the driving shaft, and
driving wheel mounted thereon consisting of a hub, two annular discs connected to
said hub, oblique peripheral bars connected with said discs and projections on one of
said dises, of a driven shaft, and a spiral mounted thereon having a number of grooves
with which said bars and projections engage for the purpose of rotating said driven
shaft, substantially as described and shown.
Dated this 2nd day of August 1890.
DUTTON & FULTON,
1, St. James Square, Manchester, Agents.