IMPROVEMENTS IN SUN AND PLANET WHEEL DRIVING GEAR FOR LATHES AND OTHER MACHINERY to be as follows:-
Year: 1885

page_text: I, CHARLES DENTON ABEL, of No 28 Southampton Buildings, Chancery Lane in
the County of Middlesex, Consulting Engineer and Patent Agent do hereby
declare the nature of my invention for "IMPROVEMENTS IN SUN AND PLANET
WHEEL DRIVING GEAR FOR LATHES AND OTHER MACHINERY to be as follows:-
."
This invention relates to an improved construction of sun and planet wheel
driving gear for lathes, shaping machines, &c wherein the sun and planet wheels
are entirely enclosed and the change from the direct motion at quick speed to the
sun and planet differential motion at slower speed can be effected without stopping
the machine.
For this purpose, the ordinary hollow stepped speed pulley runs with an
extended boss or sleeve loose upon the lathe spindle, the sleeve being made to
extend forward beyond the end of the pulley, where it is formed as a toothed
pinion. Upon the sleeve of the pulley or upon the spindle is fitted loose a disc
with internally geared rim, and upon the spindle, beyond this disc is fixed a second
disc on pins on which are mounted two or more planet wheels that gear both with
the internally toothed rim of the first named disc and the pinion on the sleeve of
the speed pulley. The disc of the toothed rim has a radial spring bolt that can
engage with one or other of several grooves formed on the inner surface of the
speed pulley, so that when the two parts are locked together by this means, and the
speed pulley is driven by its belt, it carries round the toothed rim with it, and
consequently, the planet wheels being locked in position between the central pinion
and toothed rim, the second disc and lathe spindle are carried round at the same
speed as the pulley.
The headstock or bracket carrying the lathe or other spindle has a sliding bolt
mounted on an eccentric that can be turned by a hand lever so as to enter a groove
in the disc of the toothed rim, into which also enters in the opposite direction a
part of the before mentioned spring bolt that locks the toothed rim and speed
pulley together, so that on pushing forward the eccentric bolt, this firstly holds

page_text: stationary the toothed rim and secondly, in pushing back the spring bolt, dis-
connects the speed pulley from the toothed rim, and the former being now driven
by its belt independently of the latter, the planet wheels, together with their disc
and the lathe spindle, are driven with the differential speed due to the stationary
toothed rim and the revolving central pinion.
In place of the above described spring bolt and eccentric bolt may be employed
any other suitable mechanical device for locking the toothed rim and speed putley
together and for disengaging the same and holding the toothed rim stationary.
By the above described improved construction of sun and planet wheel driving
gear, the advantages are afforded, firstly, that there is no exposed toothed gearing
causing danger to the operator; secondly, in consequence of the gearing being
enclosed, there is no danger of its becoming injured; thirdly, damage to the
driving belt such as is at present frequently caused by its coming in contact with
the toothed gear, is prevented; fourthly, the time required for passing from the
quick direct speed of the spindle to the differential speed is greatly reduced; and
fifthly, the detrimental vibrations of the spindle and consequently of the object
operated upon, is prevented, in consequence of the equilibrium attained in the
arrangement of the parts of the driving gear.

page_text: Lathes and other Machinery.
I, CHARLES DENTON ABEL, of N° 28 Southampton Buildings, Chancery Lane
in the County of Middlesex, Consulting Engineer and Patent Agent, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed to be particularly described and ascertained in and by the following
statement:-
This invention relates to an improved construction of sun and planet wheel
driving gear for lathes, shaping machines &c. wherein the sun and planet wheels
are entirely enclosed and the change from the direct motion at quick speed to the
sun,and planet differential motion at slower speed can be effected without stopping
the machine.
For this purpose the ordinary hollow stepped speed pulley runs with an extended
boss or sleeve loose upon the lathe spindle, the sleeve being made to extend
forward beyond the end of the pulley, where it is formed as a toothed pinion.
Upon the sleeve of the pulley or upon the spindle is fitted loose a disc with
internally geared rim, and upon the spindle, beyond this disc is fixed a second disc.
on pins on which are mounted two or more planet wheels, that gear both with the
internally toothed rim of the first named disc and the pinion on the sleeve of the,
speed-pulley. The disc of the toothed rim has a radial spring bolt that can engage
with one or other of several grooves formed on the inner surface of the speed
pulley, so that when the two parts are locked together by this means, and the
speed pulley is driven by its belt, it carries round the toothed rim with it, and,
consequently, the planet wheels being locked in position between the central pinion
and toothed rim, the second disc and lathe spindle are carried round at the same
speed as the pulley.
:
The headstock or bracket carrying the lathe or other spindle has a sliding bolt
mounted on an eccentric that can be turned by a hand lever so as to enter a groove
in the disc of the toothed rim, into which also enters in the opposite direction a
part of the before mentioned spring bolt that locks the toothed rim and speed
pulley together, so that on pushing forward the eccentric bolt, this firstly holds
stationary the toothed rim and secondly, in pushing back the spring bolt, dis-
connects the speed pulley from the toothed, rim, and the former being now driven
by its belt independently of the latter, the planet wheels, together with their disc
and the lathe spindle, are driven with the differential speed due to the stationary
toothed rim and the revolving central pinion.
In place of the above described spring bolt and eccentric bolt may be employed
any other suitable mechanical device for locking the toothed rim and speed pulley.
together and for disengaging the same and holding the toothed rim stationary.
By the above described improved construction of sun and planet wheel driving:
gear the advantages are afforded, firstly, that there is no exposed toothed gearing
causing danger to the operator; secondly, in consequence of the gearing being
enclosed there is no danger of its becoming injured; thirdly, damage to the driving
belt such as is at present frequently caused by its coming in contact with the
toothed gear, is prevented; fourthly, the time required for passing from the quick
direct speed of the spindle to the differential speed is greatly reduced; and fifthly,
the detrimental vibrations of the spindle and consequently of the object operated
upon is prevented in consequence of the equilibrium attained in the arrangement
of the parts of the driving gear.

page_text: DESCRIPTION OF THE DRAWINGS.
Fig. 1 sheet I of the drawings shews a longitudinal section of the headstock of
an ordinary lathe with the above described invention applied thereto, Fig. 2 shews
a section on line a b c Fig. 1, Fig. 3 shews a front view of the disc carrying the
planet wheels. A is the lathe spindle, mounted in bearings on the headstock B;
C is the stepped speed pulley running loose on A, and having the projecting end of
its extended boss formed as a toothed pinion C¹.. D is the internally toothed ring,
E E are the planet wheels mounted on pins G on the disc F, which is fixed on the
axis A; H H is the spring bolt carried by the boss of the toothed ring D; J is
the sliding bolt, carried in the headstock, and actuated by the eccentric pin K.
As shewn on the drawing, the bolt H is locked in one of the notches on the
inner face of the speed pulley, the bolt J being withdrawn, so that the speed
pulley C drives the spindle A direct through the toothed ring D, planet wheels E E¹
and disc F. An extension of the bolt H passes to the outer periphery of the
toothed rim D, being guided by a' plate D¹ fixed to the latter.
On slightly slowing the speed of the pulley C, and turning the eccentric pin K
by means of the handle so that the bolt J presses against the periphery of D, the
bolt J. will pass into the slot in which the extension of the bolt H is situated, when
by the rotation of D this slot is presented to J and this bolt will thus hold D
stationary and also push back the spring, bolt H, disconnecting it from the speed
pulley, whereupon the lathe spindle A will be driven with the differential motion
due to the sun and planet gear.
Sheet II shews a modified arrangement suitable for a cutting and shaping
machine, Fig. 1 shews a vertical section through the head of the machine with
vertical spindle; Fig. 2-is a section on line a b c Fig. 1, Fig. 3 is a section on line
d e f Fig. 2.
The construction and arrangement of the mechanism is similar in all respects to.
that first described, the parts being designated by the same letters of reference, and
no further description is therefore needed.
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 use of driving gear for lathes and other machinery, wherein the driving
pulley running loose on its spindle has a pinion formed or fixed on its extended
boss, gearing with planet wheels on a disc fixed on the said spindle, which planet
wheels also gear with a toothed ring loose on the boss of the driving pulley and
capable of being either locked therewith, so as to drive the spindle directly by the
pulley, or held stationary so as to drive the spindle at a reduced speed through the
Bun and planet gear substantially as herein described.
2. The combination of the spindle A, driving pulley. C, with-pinion C toothed.
ring D, disc F.with planet wheels E EL, and spring bolt H, arranged and operating
substantially as herein described.
.
3. In combination with the mechanism referred to in the preceding claim, the
use of the sliding bolt J, actuated by the eccentric pin K so as to lock with the
toothed ring D and disengage this from the driving pulley C, substantially as
herein described. .