Improvements in Mechanical Movements.
Year: 1887

page_text: Date of Application, 30th Aug., 1887.
Specification Accepted, 4th Oct., 1887.
Improvements in Mechanical Movements.
We, ECKLEY BRINTON COXE, Mining Engineer, and SAMUEL SALMON, Mechanical
Engineer, residing at Drifton in the County of Luzerne, and State of Pennsylvania,
in the United States of America, do hereby declare the nature of our invention and in
what manner the same is to performed to be particularly described and ascertained
in and by the following statement :-
Figure, 1, is a perspective view of a plate which is supported by and horizontally
movable upon our improved bearings.
Figure, 2, is an enlarged perspective view of the roller and one of the bearings
which are preferably employed, said parts being separated from each other.
Figure, 3, is a side elevation of the same with its bearings in section, and
Figures, 4, and, 5, are like views of modifications of said parts.
Letters of like name and kind refer to like parts in each of the figures.
In the use of screening apparatus, and in various kinds of mechanism, it is desirable
that a horizontal, gyratory motion should be produced, and for such purpose the part
to be gyrated has heretofore been suspended by chains or upon pivoted bars, but in
each instance the result has been that the part gyrated had more or less vertical
motion, and that a considerable amount of friction and wear was caused to the bearing
or suspensory parts.
To obviate these objections is the design of our invention, which invention,―
Consists, principally as an improvement in mechanical movements, in two relatively
movable parts which have parallel inner faces, in combination with a double cone that
is placed between and has rolling contact with the inner faces of said parts, and is
adapted to furnish a rolling gyrating bearing and support for the upper part,
substantially as and for the purpose hereinafter specified.
It consists, farther, as an improvement in mechanical movements, in two relatively
movable parts which, upon or within their parallel inner faces, are each provided
with a circular track or bearing, in combination with a double cone that is placed
between and has rolling contact with said tracks, and is adapted to furnish a rolling,
gyrating bearing for the upper part, substantially as and for the purpose hereinafter
shown.

page_text: It consists, farther, as an improvement in mechanical movements, in two relatively
movable parts which have parallel inner faces, and are each provided within or upon
its inner face with a circular guide track or bearing in combination with a double
cone that is placed between and has rolling contact with each of said faces and guide
tracks, and is adapted to furnish a rolling, gyrating bearing for the upper part,
substantially as and for the purpose hereinafter set forth.
It consists farther, as a means for enabling a relatively gyratory motion to be
produced between two parts which have parallel inner faces, and in combination
therewith, a double cone that is placed between and has rolling contact with said faces,
substantially as and for the purpose hereinafter shown and described.
It consists, farther, as a means for supporting a part parallel with and enabling the
same to be gyrated over a relatively stationary part, in the combination therewith of
two or more double cones, which are placed between and have rolling contact with the
contiguous, parallel faces of said parts, substantially as and for the purpose hereinafter
specified.
It consists, farther, as a means for supporting a part parallel with and gyrating the
same over a relatively stationary part in the combination therewith of two or more
double cones that are placed between and have rolling contact with the contiguous
parallel faces of said parts, and a crank which engages with said relatively movable
part and operates to move the same bodily in a circular plane, substantially as and for
the purpose hereinafter shown.
It consists, farther, as a means for supporting a part parallel with and enabling the
same to be gyrated over a relatively stationary part without change of circumferential
position, in the combination therewith of two or more double cones that are placed
between the contiguous parallel faces of said parts and have rolling contact with
parallel circular guide tracks which are provided upon or within each of said faces,
substantially as and for the purpose hereinafter set forth.
It consists, finally, as a means for supporting a part parallel with and gyrating the
same over a relatively stationary part without change of circumferential position, in
the combination therewith of two or more double cones that are placed between and
have rolling contact with parallel, circular guide tracks, which are provided upon or
within the contiguous parallel faces of said parts, and a crank that engages with said
relatively movable part and operates to move the same bodily in a circular plane,
substantially as and for the purpose hereinafter shown and described.
As the special organization to which our invention is applied forms no part of such
invention, it will be sufficient to illustrate its operation in connection with a supporting
table that is adapted to receive any desired machine, which table consists of a
rectangular plate, A, that has any required thickness, and corresponds in general size
and proportions to the like features of a second plate, B, which is supported in a
horizontal position and is usually fixed in place.
Near each corner, upon the upper face of the base plate B, is secured a circular
plate, C, which at a point midway between its centre and periphery, is provided with
an annular flange c, that extends upward and in cross section has the form of an
inverted letter, V, with the point preferably cut away so as to produce at such point a
horizontal bearing.
Upon the plate, C, is placed a double cone, D, which within each of its conical
faces, d, is provided with a circumferential groove, d¹, that transversely corresponds
to the shape and size of the flange, c, so that when said cone is placed upon the
circular plate, C, its point will coincide with the axis of the latter, and its face will
rest upon the face of said plate upon each side of said flange, and its said groove will fit
over said flange with the sides of said parts in contact, as shown in Fig. 3. If now
said cone is rotated, it will roll around said flanged plate without change thereon of
radial position and its entire bearing surface will have contact with the corresponding
surface of said plate without slipping and with no friction other than such as is
produced by the rolling together of two surfaces.
The plate or table, A, is provided with four of the circular flanged plates, C, and, C,
which are attached to the lower face of said table, in positions that correspond to the

page_text: positions of the like plates upon the base, B, and rest upon and engage with the
upper portions of the cone rollers, D, their bearings upon the faces of said rollers
being precisely the same as in case of the lower portions of said cones and their
plates.
As thus arranged, the entire weight of the table is supported by the cone rollers,
and said table may be gyrated horizontally in either direction by applying sufficient
power to overcome its inertia, and cause said cones to roll around their lower tracks.
As the axis of each cone is oblique to the plane of its track, it will be seen that when
travelling around said track, the central portion of said cone will describe a circle the
diameter of which will determine the amount of movement of said table in opposite
directions. As the contact of said cones with both series of bearing plates is a rolling
contact, the friction caused by their movements is so slight as to render necessary for
the movement of the table the expenditure of no appreciable amount of power over
what would be required to effect such movement were said table suspended by the
theoretically frictionless spring of a clock pendulum. By the employment of cones
and bearing plates having hardened surfaces, the wear upon the same will become
practically nothing and the durability of the mechanism-if breakage is prevented-
will exceed that of any possible construction in which there is sliding contact between
the bearing surfaces.
The movement of the table, A, is preferably, secured by means of a crank, E,
which has its shaft journalled at or near the centre of the base, B, and has its upper
end or pin, e, journalled within the centre of said table. The throw of the crank
coincides with the oscillations of the cone rollers, D, and, D, so that said crank is
subjected to no strain other than such as is necessary in order to start said table and
keep it in motion. Any desired means may be employed for rotating said crank shaft,
but a belt and pulley are preferably used.
The annular flanges, c, of the plates, C, operate to prevent radial displacement of
the cone rollers, and are preferably employed, but such result can be obtained by other
forms if desired.-In figure, 4, is shown a modification in the construction of said
parts in which the roller has plane conical faces, d, and, d, and a cylindrical peri-
phery, d, while the bearing plate has a plane face surrounded by an annular
Hange, c, that has a face, c², which inclines upward and outward at the precise
angle necessary to enable it to receive rolling contact from the periphery, d², of said
roller.
In figure, 5, is seen another modification in which the faces, d, and, d, of the roller
are plane, and at the end or apex of each is provided a small cylindrical boss, d³, that
is in a line axially, with the axis of said roller, and terminates in a cone, d, as shown.
The bearing plate, C, has a plane upper face and at its centre is provided with a
cylindrical recess, c³, which is in a line axially with the axis of said plate, and has
such size as to enable it to receive the boss, ³, and enable the conical end, d', of the
same to bear against.and have rolling contact with its sides, as shown.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :-
1. As an improvement in mechanical movements, two relatively movable parts
which have parallel inner faces, in combination with a double cone that is placed
between and has rolling contact with the inner faces of said parts and is adapted to
furnish a rolling gyrating bearing and support for the upper part, substantially as and
for the purpose specified.
2. As an improvement in mechanical movements, two relatively movable parts
which upon or within their parallel, inner faces, are each provided with a circular
track or bearing in combination with a double cone that is placed between and has
rolling contact with said tracks, and is adapted to furnish a rolling, gyrating bearing
for the upper part, substantially as and for the purpose shown.
3. As an improvement in mechanical movements, two relatively movable parts
which have parallel inner faces and are each provided within or upon its inner face
with a circular guide track or bearing, in combination with a double cone that is

page_text: placed between and has rolling contact with each of said faces and guide tracks, and
is adapted to furnish a rolling, gyrating bearing for the upper part, substantially as
and for the purpose set forth.
4. As a means for enabling a relatively gyratory motion to be produced between
two parts which have parallel inner faces, and in combination therewith, a double cone
that is placed between and has rolling contact with said faces, substantially as and for
the purpose shown and described.
5. As a means for supporting a part parallel with and enabling the same to be
gyrated over a relatively stationary part, the combination therewith of two or more
double cones which are placed between and have rolling contact with the contiguous
parallel faces of said parts, substantially as and for the purpose specified.
6. As a means for supporting a part parallel with and gyrating the same over a
relatively stationary part, the combination therewith of two or more double cones
that are placed between and have rolling contact with the contiguous parallel faces of
said parts, and a crank which engages with said relatively movable part, and
operates to move the same bodily in a circular plane, substantially as and for the
purpose shown.
7. As a means for supporting a part parallel with and enabling the same to be
gyrated over a relatively stationary part without change of circumferential position,
the combination therewith of two or more double cones that are placed between the
contiguous parallel faces of said parts, and have rolling contact with parallel circular
guide tracks, which are provided upon or within each of said faces, substantially as
and for the purpose set forth.
S. As a means for supporting a part parallel with and gyrating the same over a
relatively stationary part without change of circumferential position, the combination
therewith of two or more double cones that are placed between and have rolling
contact with parallel circular guide tracks which are provided upon or within the
contiguous parallel faces of said parts, and a crank that engages with said relatively
movable part and operates to move the same bodily in a circular plane, substantially
as and for the purpose shown and described.
Dated this 30th day of August 1887