New or Improved Gear Wheels for Transmitting Rotary Motion.
Year: 1897

page_text: Date of Application, 11th Mar., 1897
Complete Specification Left, 23rd Nov., 1897-Accepted, 29th Jan., 1898
PROVISIONAL SPECIFICATION.
New or Improved Gear Wheels for Transmitting Rotary Motion.
We, WALTER JOHN LLOYD and WILLIAM PRIEST, of The Quadrant Cycle Com-
pany, Limited, Sheepcote Street, Birmingham, in the County of Warwick,
Velocipede Manufacturers, do hereby declare the nature of this invention to be as
follows:-
The said invention consists of the new or improved construction and arrangement
of the parts hereinafter described of gear wheels for transmitting rotary motion in
machinery or apparatus by which construction and arrangement of the parts the
said gear wheels may either be used in place of ordinary spur wheels or in place
of ordinary mitre or bevil toothed wheels; that is to say, the new or improved
construction of gear wheels constituting the said invention permits the said wheels
being used on and gearing together parallel shafts or shafts arranged at a right or
other angle to each other.
In constructing a gear wheel according to the said invention we arrange two
circular rings or discs parallel to each other, one of the said rings being somewhat
smaller than the other, the smaller disc having a series of short radial arms nearly
circular at their free ends. Or we construct a wheel having a flange at one side
or edge and a series of short arms at the other edge, the short arms being parallel
to the flange. We connect the centres of the nearly circular ends of the arms to
the side of the ring disc or flange by a series of pins or axes on which are placed
rollers of a diameter equal to the distance or pitch between one roller and the next
roller. The end of the rollers presented to the short arms described are rounded
or made slightly conical.
Instead of employing two rings or discs, one carrying a series of arms, each of
the said rings or discs may be of the same diameter and each carry short radial
arms, and the flange of the flanged wheel herein before described may be dispensed
with, each edge or side of the rim of the wheel being provided with short radial
arms at opposite points for carrying the rollers described.
When two wheels of the construction described gear together the rollers of one
wheel in its rotary motion pass into the spaces between the rollers of the other wheel
and bearing on the said rollers impart a rotary motion to the last named wheel.
In consequence of the slightly rounded or conical figure of the ends of the
rollers, the wheels may be arranged in planes inclined to each other at various
angles without affecting the smooth running and engagement of the wheels.
Although we prefer to support the pins at both ends yet we wish it to be under-
stood that in light mechanism or machinery the pins may be supported at one end
only. In the latter case however we prefer to provide the pins with large bases or
flanges at the parts where they adjoin the single ring or disc.
Dated the Eleventh day of March 1897.
W. T. WHITEMAN,
Agent for the Applicants.

page_text: New or Improved Gear Wheels for Transmitting Rotary Motion.
We, WALTER JOIN LLOYD and WILLIAM PRIEST, of The Quadrant Cycle Com-
pany, Limited, Sheepcote Street, Birmingham, in the County of Warwick,
Velocipede Manufacturers, do hereby declare the nature of the said invention and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:—
The said invention consists of the new or improved construction and arrange-
ment of the parts hereinafter described of gear wheels for transmitting rotary
motion in machinery or apparatus, by which construction and arrangement of
the parts the said gear wheels may either be used in place of ordinary spur wheels
or in place of ordinary mitre or bevil toothed wheels; that is to say, the new or
improved construction of gear wheels constituting the said invention permits the
said wheels being used on and gearing together parallel shafts or shafts arranged
at a right or other angle to each other.
In constructing a gear wheel according to the said invention we arrange two
circular rings or dises parallel to each other, one of the said rings heing somewhat
smaller than the other, the smaller disc having a cries of short radial orms nearly
circular at their free ends. Or we construct a wheel having a flange at one side or
edge and a series of short arms at the other edge the short arms being parallel to
the flange. Or we take a ring having a flange at one edge and attach to the other
or unflanged edge of the said ring a disc having a series of radial arms. We con-
nect the centres of the nearly circular ends of the arms to the side of the ring, disc
or flange by a series of pins or axes on which are placed rollers of a diameter equal
to the distance or pitch between one roller and the next roller. The ends of the
rollers presented to the short arms described are rounded or made of a conoidal
figure. Or the said rollers are conoidal throughout their whole length.
Instead of employing two rings or discs one carrying a series of arms, each of
the said rings or discs may be of the same diameter and each carry short radial
arms, and the flange of the flanged wheel herein before described may be dispensed
with, each edge or side of the rim of the wheel being provided with short radial
arms at opposite points for carrying the rollers described.
Figures 1 and 2 of the accompanying drawing represent in front and side eleva-
tion respectively a gear wheel constructed according to the said invention and
Figure 3 represents a portion of the said gear wheel in section.
The same letters of reference indicate the same parts in the several figures of the
drawing.
a, a is the circular disc or flange of the wheel carrying the series of equi-distant
pins or spindles b, b the axes of which are parallel or approximately parallel to the
On the said pins or
axis of the disc or flange a and equi-distant therefrom.
spindles b, bare placed the rollers c, the said rollers being of a rounded or
conoidal figure at their outer ends or of a conoidal figure throughout their whole
length. The outer ends of the pins or spindles b, b are supported by the short
radial arms, of the armed disc d, . It will be seen by reference to Figure 1
that the diameter of the rollers c, c is equal or approximately equal to the distance
between the rollers on the pitch circle part of which is indicated by the curved
dotted line, x.
When two wheels of the construction described and represented gear together
the rollers c, c of one wheel in its rotary motion pass into the spaces between the
rollers c, c of the other wheel and bearing on the said rollers c, e impart a rotary
motion to the last named wheel.

page_text: As the rollers c, c of one wheel pass into the spaces between the rollers c, c of the
other wheel they partake of a slight rotary motion on their pins or spindles b, b
and prevent wholly or in great part friction in the said gear. Further, as the
acting roller, for the time being, of the driving wheel fills or practically fills the
space between the pair of rollers of the driven wheel with which it is engaged
back-lash in the said gearing is practically impossible.
In consequence of the slightly rounded or conical figure of the ends of the rollers,
the wheels may be arranged in planes inclined to each other at various angles
without affecting the smooth running and engagement of the wheels.
Although we prefer to support the pins at both ends yet we wish it to be under-
stood that in light mechanism or machinery the pins may be supported at one end
only. In the latter case however we prefer to provide the pins with large bases or
flanges at the parts where they adjoin the single ring or disc and with rivet like
heads at their outer ends to preserve the rollers in position.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that wo
claim as the said invention of-"New or improved gear wheels for transmitting
rotary motion":-
The construction and arrangement of the parts of gear wheels hereinbefore
described and illustrated in the accompanying drawing the said construction and
arrangement of parts consisting essentially of a ring or disc having on one side
or face a series of projecting pins or spindles equi-distant from each other and
from the axis of the ring or disc, the axes of the pins or spindles being parallel or
approximately parallel to the axis of the ring or disc the said pins or spindles
carrying rollers of such a diameter that the distance between the pairs of rollers
is equal or approximately equal to the diameter of the rollers, the said rollers being
made of a slightly conical or conoidal figure at their outer ends so as to permit the
rollers of one wheel to pass between or gear with the rollers of a second wheel at
a right or other angle to the rollers of the said second wheel, the roller pins or
spindles being preferably supported at their outer ends by a series of radial arms
situated parallel to the ring or disc carrying the pins or spindles substantially as
set forth and shown.
Dated this Twentieth day of November 1897.
WALTER JOHN LLOYD.
WILLIAM PRIEST.