Improvements in or appertaining to the Driving-gear of Lathes.
Year: 1892

page_text: Date of Application, 23rd Nov., 1892
Complete Specification Left. 16th May, 1893-Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in or appertaining to the Driving-gear of Lathes.
I, WILLIAM HUDSON of Keighley in the County of York, Machine Tool
Maker, do hereby declare the nature of this invention to be as follows, that is
to say :-
It relates to improvements in or appertaining to the driving gear of lathes but
more especially to that known as treble or triple gear and consists of arranging
such driving gear and the bearings or supports upon which same is mounted so that
perfect freedom is allowed for the driving belt whether foot or other power is used
as the motor, while when said treble gear is in operation the force for revolving the
face plate" is exerted through gearing supported by bearings in close proximity
with said "face-plate."
66
In accordance with my invention the driving cone, with a toothed wheel at each
end of it, is mounted in the usual manner upon the lathe's driving spindle, and
behind or at the back of this cone a supplementary shaft having suitably toothed
gearing-wheels fixed to or formed integrally with it, is made to be moveable (by
eccentric sliding or other adjustable bearings) so that its said toothed wheels may
be brought, when a double-gear drive is desired, into gear with the toothed wheels
adjoining the cone in the usual manner, however when treble gear is required,
instead of the wheels on the supplementary shaft gearing directly with those on the
spindle, an intermediate or idle wheel is mounted in moveable bearings either on an
eccentric or to slide in a slot) carried by the outer support in which the spindle is
mounted, and the large wheel on this supplementary shaft is made to gear with said
intermediate wheel, while the smaller wheel at the other end of said shaft is made
to gear with a toothed wheel mounted in adjustable bearings in suitable proximity
with it, the shaft of this latter wheel extending through its said bearings to carry
another toothed wheel on the other side thereof in which position it is appropriately
situated for gearing with a toothed wheel attached to or formed integrally with the
face plate, so that this said face-plate is thereby rotated.
Instead of having upon the supplementary shaft a small toothed wheel that is to
be adjusted to gear, at one time with the larger wheel mounted on the lathe's
spindle in proximity with the cone to effect what is known as "double-gear," while
it has to be slided or otherwise adjusted to gear with the additional wheel to effect
the treble gear as above described, I form this wheel broad enough or in two parts
so that at one time one part may be used for "double-gear" and at another time
the other part for "treble-gear," and this wheel I firmly fix to or form it integrally
with the supplementary shaft.
Dated this 92nd day of November 1892
WILLIAM HUDSON,
Per Samuel Hey,
Agent.
COMPLETE SPECIFICATION.
Improvements in or appertaining to the Driving-gear of Lathes.
I, WILLIAM HUDSON of Keighley in the County of York, Machine Tool
Maker, 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, that is to say:
It relates to improvements in or appertaining to the driving-gear of lathes, but

page_text: more especially to that known as treble or triple gear and consists of arranging
such driving-gear and the bearings or supports upon which same is mounted so that
perfect freedom is allowed to the driving belt whether foot or other power is used
as the motor, while when said treble gear is in operation the force or power for
revolving the "face-plate" is exerted through gearing supported by bearings in
close proximity with said "face-plate."
In order that my said invention may be readily understood and carried into
effect, I have hereunto appended sheets of drawings illustrative thereof, to which
by figures and letters reference is made in the following description.
Fig. 1 is front elevation of a foot power lathe made in accordance with my
invention, from which it will readily be understood how my said invention may be
applied to lathes operated by other power.
Fig. 2 is a view of said lathe as seen from above.
Fig. 3 is a back elevation of the said lathe.
Fig. 4 is a drawing in detail enlarged scale illustrative of the gearing on the
head-stock as seen in the direction of the arrow a.
Fig. 5 is illustrative of said head stock in section, same scale as Fig. 4, but as
seen in the opposite direction to that indicated by the arrow a and with part of the
face plate removed.
Fig. 6 is back elevation enlarged scale of the head stock and gearing as followed
in the production of lathes of strong and heavy construction.
Similar letters and figures of reference indicate similar parts throughout the
several views.
In accordance with my invention the driving cone b, with a toothed wheel c and d
at each end of it, is mounted in the usual manner upon the lathe's driving spindle e,
and behind or at the back of this cone a supplementary shaft f, having suitable
toothed gearing wheels hand fixed to or formed integrally with it, is made to
be moveable (by eccentric bearings at f1 and 2 of the well known kind or instead
of this class of adjustable bearings being employed any others of any well known
kind might be employed) so that its said toothed gearing wheels g, and h (its
wheel at this time being idle) may be brought, when a double gear drive is
desired, into gear with the toothed wheels c and d respectively, such being the
usual and well known method of gearing for obtaining said double-gear_drive;
however when treble-gear is required, instead of the wheels g and ½ gearing directly
with the wheels c and d as above described, an intermediate idle wheel m is mounted
in moveable bearings (these being any of the well known kind as is before stated,
although the accompanying drawings show same to be of the adjustable eccentric
class) carried by the outer support n' of the head stock n, and the wheel g on said
shaft is made to gear with the said intermediate wheel m, while the wheel k (at
this time the wheel is idle and out of gear with the wheel () is made to gear with
the wheel p which is fixed on a shaft carried by adjustable bearings (also of one
or other of the well known classes) fitting within the support s formed on the
upright part 2 of the head stock n, this shaft r being arranged to carry another
toothed wheel t at its other end in such a position that it may gear with the toothed
wheel u attached to or formed integrally with the face plate u, so that this said face
plate is thereby rotated and that in the proper direction without the use of an
internally toothed wheel on said face plate v where the wheel u is used.
Instead of having two wheels h and k, fixed upon the shaft f one wheel equal in
breadth to both these wheels might be fixed or formed thereon.
Again the wheel / (see Fig. 6) may be formed on a more central part of the
shaft while the wheels p and t are arranged to slide with their shaft upon their
bearings and s' so that they may be moved laterally from their positions where
they are in gear with the wheels u and in which position they are shown by full
lines in Fig. 6, into the position shown by broken lines in said Fig. 6 in which they
are out of gear with said wheels, and this arrangement and method of construction
I preferably follow in the production of strong and heavy lathes.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what I
claim is :-
1. The combination and arrangement of intermediate gearing wheels in treble-
gear-lathes substantially as herein set forth and described.
2. The use and employment of the intermediate wheel m mounted and arranged
to operate in connection with the other gearing wheels of a lathe substantially as
herein specified.
3. The combination of the cone having gearing wheels c and d, the gearing
wheel m mounted on adjustable bearings, the gearing wheels g, h and k mounted
upon the shaft, the wheels p and t mounted on adjustable bearings, and the spur
wheel u attached to or formed on the face plate v substantially as and for the
purposes described.