Year: 1887

page_text: Date of Application, 21st May, 1887
Complete Left, 20th Feb., 1888
Complete Accepted, 20th Apr., 1888
*1, JEFFREYS PARRY DE WINTON of The Union Iron Works, Carnarvon, North
Wales, Engineer do hereby declare the nature of this invention to be as follows :-
My invention especially refers to the feed and reversing motions for the tables of
circular sawing machines for sawing slate and other stone. The feed motion is
obtained by a worm on the saw spindle working into a worm wheel on a counter-
shaft at the other end of which shaft there is another worm which works into a worm
wheel keyed on a shaft running across the machine parallel with the saw spindle.
Above this shaft is another shaft having the pinion keyed thereon which gears with
the rack on the table and gives motion thereto. Keyed on this latter pinion shaft is
a gear wheel and on the said shaft there is also a rocking or swinging lever or arm
carrying a wheel which is always in gear with the said gear wheel keyed on the
pinion shaft but by means of a crank or eccentric the wheel on the rocking lever or
arm is also caused to gear with a wheel keyed on the second worm shaft when the
machine will be in gear for the slow feed motion or when the wheel on the rocking
or swinging lever or arm is at the other end of its stroke it gears with a wheel or
pinion keyed on the saw spindle and the machine is in gear for a quick reverse
motion, and when the swinging arm is in the middle of its stroke the machine is out
of gear and the table stopped.
1007
BREWER & SON,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Machinery for Sawing Slate and other Stone.
I, JEFFREYS PARRY DE WINTON, of The Union Iron Works, Carnarvon, North
Wales, Engineer 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 :-
My invention especially refers to the feed and reversing motions for the tables of
circular sawing machines for sawing slate and other stone. The feed motion is
obtained by a worm on the saw spindle working into a worm wheel on a counter-
shaft, at the other end of which shaft there is another worm which works into a worm
wheel keyed on a shaft running across the machine parallel with the saw spindle.
Above this shaft is another shaft having the pinion keyed thereon which gears with
the rack on the table and gives motion thereto. Keyed on this latter pinion shaft is
a gear wheel and on the said shaft there is also a rocking or swinging lever or arm
carrying a wheel which is always in gear with the said gear wheel keyed on the
pinion shaft but by means of a crank or eccentric the wheel on the rocking lever or
arm is also caused when desired to gear with a wheel keyed on the second worm
wheel shaft when the machine will be in gear for the slow feed motion or when the
wheel on the rocking or swinging lever or arm is at the other end of its stroke it
gears with a wheel or pinion keyed on the saw spindle and the machine is in gear for
a quick reverse motion, and when the swinging arm is in the middle of its stroke the
machine is out of gear and the table stopped.
Figure 1 of the accompanying drawings is a side elevation with driving pulleys
removed, of so much of a machine for sawing slate and other stone, constructed
according to my invention as will be necessary to understand the same; Figure 2
shews a vertical section of same machine through line X Y of Figure 3, which latter
is a part plan of the machine with the table removed, and Figure 4 is a transverse
section through line X1 Y1 of Figure 1. Figure 5 represents a part side elevation of
a similar machine, but having the reversing motion dispensed with. Figure 6 being
a plan of Figure 5 but with the table removed.
Similar letters of reference refer to like parts in all the figures.
A is the worm on the saw spindle A, B is the worm wheel on the counter shaft B¹,
C is the worm at the end of the said shaft B', and D is the worm wheel in gear
therewith, D¹ being the shaft on which the worm wheel D is keyed. E is the shaft
running parallel to the shaft D', D' is the spur wheel on the shaft D¹; E¹ is the
pinion keyed to the shaft E, and E' is a spur wheel on the same shaft; F is the rack
on the travelling table G; H is the rocking or swinging lever or arm on the shaft E;
H' is the spur wheel carried at the end of the lever H; J is the eccentric for rocking
the swinging lever or arm H; A' is the spur pinion on the saw spindle A¹.
The action of the machine is as follows:
The saw spindle A¹ is revolved by means of a belt pulley as shewn in Figure 3 and
carries the worm A which latter is in gear with worm wheel B so driving the shaft B¹

page_text: and worm C the latter driving the worm wheel D which in its turn drives the shaft D¹
and spur wheel D' the latter driving the wheel H¹ on the arm H. This wheel H'
driving the wheel E' revolves the shaft E at the same time communicating motion to
the pinion E¹ which drives the rack F and a slow speed motion is thus communicated
to the table G when the gearing is in this position, that is to say during the advance
motion of the said table G the rock or swing arm H carrying the spur wheel H' is
held by the eccentric crank or cam J in such a position that the motion is communi-
cated to the table G from the screw shaft through the medium of the speed decreasing
gear before described.
In order to obtain a quick return motion the eccentric or cam J is caused to swing
the arm H, and throw the spur wheel H' out of gear with the wheel D' and into gear
with the pinion A³ on the saw spindle, motion is then communicated to the table G
from said pinion A' through spur wheels H', E³, pinion E¹ to rack F.
In cases where a reverse motion is not required for the table, and as shewn at
Figures 5 and 6, I dispense with the cross shaft D¹ and spur wheel D', also with the
swing lever H with its wheel H' and with the pinion A³, and in lieu thereof I fix the
worm wheel D on the end of pinion shaft E which is thus brought over instead of
under the worm C, as will be best seen at Figure 5. The rack pinion E' is fitted
loosely on the shaft E and connected thereto when required by means of a clutch
coupling Fx see Figure 6 or other convenient or well known mode of connection
which enables the pinion E¹ to be disconnected with the shaft E and thus stopping the
feed, and the said table G may be run back or returned by hand or otherwise.
When the swing arm H Figures 1 to 4 is in the centre of its travel the table G
would not be driven.
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 I
claim is:-
a
1. In machinery for sawing slate and other stone, the swing or rock arm or arms H
operated by cam crank or eccentric J and carrying gear wheel H¹ for obtaining
slow advance motion, and a quick return of the carrying table or bed G of the
machine as set forth and with reference to Figures 1 to 4 of the accompanying
drawings.
2. In machinery for sawing slate and other stone the construction and combination
of gearing for obtaining the required varying speeds of the travelling bed G and
consisting of worm A, worm wheel B, worm C, worm wheel D, spur wheel D', swing
arm and spur wheel H H₁, spur wheel E³, pinion E¹ and rack F together with
operating cam or eccentric J and pinion A³ and parts connected and operating there-
with substantially as and for the purposes herein set forth with reference to Figures 1
to 4 of the accompanying drawings.
3. In machinery for sawing slate and other stone, the combination of mechanism
composed of the two worms A C, and worm wheels D B, together with clutch or
equivalent Fx and pinion F1 substantially as and for the purposes heroin set forth and
with especial reference to Figures 5 and 6 of the accompanying drawings.
Dated this 20th Jan of Fohm 1000