Year: 1887

page_text: 1, JAMES COULTER, of Bank Foot Foundry, Batley, Yorkshire, Machine Maker do
hereby declare the nature of this invention to be as follows:-
My invention has reference to that class of machinery where the stone is placed
upon a table traversing backward and forward underneath cutting tools, somewhat
in the manner of an iron planing machine. My improvements therein consist, firstly,
in the employment of cutting tools placed horizontally and in cutting tools placed
vertically for the purpose of dressing or cutting the upper surface, and also one
edge of the stone, such cutting tools being geared together by bevelled or toothed
segments, so that when the horizontal cutting tool holder is reversed, the vertical
cutting tool holder is also reversed; secondly, my invention consists in apparatus to
be employed for reversing such cutting tools.
In order to carry out this part of my invention, the left hand side of the tool
holder is made with a projecting piece or lever arm provided with an
opening or slot
to receive a sliding block carrying an anti-friction bowl. The framework of the
machine is made with a pedestal having a boss thereon, which supports the lower and
of a square rocking vertical shaft. Another bracket is employed, provided with pro-
jecting pieces for the purpose of receiving a horizontal sliding bar hinged to a
horizontal rod, which rod is connected by a pin to another rod, which latter rod is
fastened to the square vertical rocking shaft. The lower end of the rocking shaft
also carries a lever arm, to which is attached an anti-friction bowl arranged to be
opposite an adjustable dog or angle bracket attached to the end of the travelling
table, the arrangement being such that when the travelling table arrives at the end
of its stroke in either direction, the dog or bracket would strike the anti-friction bowl,
thereby causing the vertical shaft to rock so as to operate the series of rods previously
mentioned, causing the horizontal slotted bar to be slided endwise, consequently the
bowl therein and tool holder will be carried or caused to oscillate upon its journal,
thereby reversing the position of the cutting tools so that when the travelling table
D
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page_text: and stone make a return journey, the points of the cutting tools would be in a proper
position to operate upon the stone, and this happens every time the travelling table
arrives at the end of its stroke. The table not only reverses by suitable strap guide
arrangement at each end of the stroke for the return journey, but the cutting tools
are also reversed in such a position as to operate upon the stone as required, and as
the vertical tool-holder is in gear with the horizontal tool holder, it follows that the
motion of the horizontal tool holder also reverses the position of the tools placed in
the vertical tool holder.

page_text: COMPLETE SPECIFICATION.
Improvements in Stone Dressing Machinery.
I, JAMES COULTER, of Bank Foot Foundry, Batley, Yorkshire, Machine Maker,
do heroby 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 has reference to that class of stone dressing machinery where the
stone is placed upon a table traversing backward and forward underneath cutting tools
somewhat in the manner of an iron planing machine. My improvements therein
consist, firstly, in the employment of entting tools placed horizontally, and in cutting
tools placed vertically for the purpose of dressing or cutting the upper surface and
also one edge of the stone, such cutting tools being geared together by bevelled or
toothed segments, so that when the horizontal cutting tool lolder is reversed, the
vertical cutting tool holder is also reversed; secondly my invention consists in
apparatus to be employed for reversing such cutting tools.
Such being the nature and object of my invention, I will now proceed to describe
the same more fully, and for that purpose make reference to the accompanying sheet
of drawings illustrative thereof, wherein Fig. 1 is end view of a stone dressing
machine having my improvements applied thereto, and Fig. 2 is side view thereof.
No. 1 represents the stationary framework of the machine, carrying vertical
standards 2, connected together by top cross rail 3. No. 4 represents the travelling
table, resting and running upon small rollers 5, such table being caused to travel
backward and forward by pinion wheels 6 working in racks 7 fixed underneath the
said table 4, such said pinions being driven by gear wheels 8 and pulleys 9.
Number 10 is the horizontal oscillating crosshead or tool holder corresponding in
length to the width of the inside of the machine, such tool holder being made with
a number of holes or slots to receive the cutting tools 11, which are fastened therein
by wedges or other suitable means. Each end of the crosshead is made with journals
or studs 12, which rest in and are supported by pedestals or brackets 13, but on the
right hand of the said crosshead is fixed a quadrant bevel wheel 14, gearing with another
quadrant bevel wheel b, attached to the vertical oscillating tool holder 15 (see Figs. 3
and 4). The stone to be operated upon is represented at 16, and is fastened upon the
table 4 by adjustable sliding vices 17, which can be made to slide backward and
forward to the requirement of the stone. It will be seen that as the bed and stone
travel backward and forward in contact with the cutting tools, the upper surface of
the stone and one edge thereof will be planed or dressed by the said tools.
In order to reverse the position of the cutting tools each time the travelling tablo
arrives at the extreme end of its backward and forward stroke, the left hand side of
the tool holder or crosshead 10 is made with a projecting piece or lever arm 19
provided with an opening or slot to receive a sliding block having a projecting stud on
which is placed another sliding block 20. The framework of the machine carries a
pedestal having a long boss 21, which supports the lower end of the vertical square

page_text: rocking shaft 22. To the pedestal 13 I attach a suitably shaped bracket 23, made
with projecting pieces 24 for the purpose of receiving a sliding horizontal bar 25,
slotted to receive the sliding block 20, carried at one end of the lever arm 19. The
sliding bar 25 is hinged at 26 to a horizontal rod 27, which rod is connected by a pin
to another lever 28, which latter lever is fastened to the vertical rocking shaft 22; the
lower end of the rocking shaft also carries a lever arm 30 (see plan view Fig. 7), at
one end of which arm is an antifriction bowl 31, arranged to be opposite an adjustable
angle bracket 32 attached to each end of the travelling table, the arrangement being
such that when the travelling table arrives at the end of its stroke in either direction,
the dog or bracket 32 would come into contact with and move the antifriction bowl 31,
thereby causing the vertical shaft 22 to rock, in doing which the series of rods 27
and 28 would be operated, causing the horizontal slotted bar 25 to be slided endwise,
consequently the tool holder 10 would be caused to oscillate upon the journal 12, and
through it tho vertical tool holder 15, thereby reversing the position of both cutting
tools, so that when the travelling table and stone made a return journey, the points of
the said cutting tools would be in a proper position to operate upon the stone, and
this happens each time the travelling table arrives at the end of its stroke. The table
not only reverses by suitable strap guide motion at each end of the stroke for the
return journey, but, as just explained, the cutting tools are also reversed in such a
position as to operate upon the stone as required, and as the vertical tool holder 15 is
in gear with the horizontal tool holder 10, it follows that the motion of the horizontal
tool holder also reverses the position of the tools placed in the vertical tool holder.
The arm 19 projecting from the tool holder is made hollow, and in it is placed a spiral
spring (see section Fig. 8), one end of which spring is connected to the sliding block 20,
which spring is employed for the purpose of forcing the said sliding block against the
curved dish or casting 34, (see Fig. 6), during the time the tool holder is oscillating
ou its journal 12; and when the sliding block 20 reaches the end of the curvo 34,
such block is forced down the end thereof c, and locked until released or forced out of
its position by the motion of the sliding bar 25. Stop pieces d and e are employed
for the lever arm 19 to rest against, so that when the sliding block 20 is locked at the
end of the curve 31, and the upper part of the lever arm 19 resting against the stop
piece d, the tool holder 10 is rigidly held in position at a proper angle during the
cutting operation.
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 -
Firstly. In a stone dressing machine, the combination therewith of horizontal and
vertical tool holders, geared together in the manner herein shewn, for the purpose of
obtaining a simultaneous movement of both tool holders, substantially as described.
Secondly. In a stone dressing machine, the combination of the rocking shaft 22,
horizontal slotted bar 25, lever arm 19, projecting from the crosshead, and parts con-
nected therewith, all employed for the purpose of rocking the crosshead when
reversing the position of the cutting tools, substantially as described and shewn in the
drawings.
Dated this 31st day of July 1888.
TASKER & CROSSLEY,
Halifax, Agents.