Year: 1888

page_text: Late of Application, 14th June, 1888
Complete Specification Left, 11th Mar., 1889
Complete Specification Accepted, 4th May, 1889
I, JOHN MCADAM, of 19 Sea Terrace, Middleton, West Hartlepool, in the County
of Durham, Engineer do hereby declare the nature of this invention to be as
follows:-
My Invention consists in an arrangement or arrangements of cutting tools, and of
the material to be operated upon, so that my arrangement of tools may be used with
It is
advantage, and is applicable to slotting, planing, horing and other machines.
of special value when two or more slabs or blocks, (such as the forgings for the
eccentric straps or crank cheeks of a marine engine) have to be machined.
Taking first the arrangement of the material, I arrange the slab or blocks in the
following manner :-
1st. On the table of the machine I place a distance piece to give clearance for the
tool and holder at the bottom of the stroke.
2nd. Upon this distance piece I place one or more of the slabs or blocks to be
machined.
3rd. On the top of this another distance piece.
4th. One or more slabs or blocks as before.
And so on, as many sets of slabs or blocks as may be required.
Having arranged the material as above described, I employ a toolholder of such
construction that it will hold as many tools (one above the other) as there are sets of
slabs or blocks, the tools being so placed that each will engage with the material at
or about the same time.
By the above means the stroke of the machine is only equal to what would be
required for one slab or block or set of slabs or blocks by the ordinary method, and
in the case of short stroke machines this allows of the whole set of slabs being
machined in little more time than would ordinarily serve for one.
For certain classes of work with parallel sides, I use two tool holders, each with its
full complement of tools, the slabs or blocks being placed as before described, by this
means two sides of each slab or block can be machined at once.

page_text: The tool holder used may be a modification of the ordinary type with a recess for
each tool, the tools being secured by set pins or in any ordinary manner. All or
any of the tools may have a suitable adjusting-screw for finally adjusting it to the
work.
DIMITTALION.
Improvements in and Connected with Machine Tools.
I, JOHN MCADAM, of 19 Sea Terrace, Middleton, West Hartlepool, in the County
of Durham, 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 :-
It is
My Invention consists in an arrangement or arrangements of cutting tools, and of
the material to be operated upon so that my arrangement of tools may be used with
advantage, and is applicable to slotting, planing, boring, and other machines.
of special value when two or more slabs or blocks (such as the forgings for the
eccentric straps or crank cheeks of a marine engine) have to be machined.
Taking first the arrangement of the material, I arrange the slabs or blocks in the
following manner :-
1st. On the table of the machine I place a distance-piece to give clearance for the
tool and holder at the bottom of the stroke.
2nd. Upon this distance-piece I place one or more of the slabs or blocks to be
machined.
3rd. On the top of this another distance-piece.
4th. One or more slabs or blocks as before.
And so on, as many sets of slabs or blocks as may be required.
Having arranged the material as above described, I employ a tool-holder of such
construction that it will hold as many tools (one above the other) as there are sets of
slabs or blocks, the tools being so placed that each will engage with the material at
or about the same time.
By the above means the stroke of the machine is only equal to what would be required
for one slab, or block, or set of slabs or blocks, by the ordinary method, and in the
case of short-stroke machines this allows of the whole set of slabs being machined in
little more time than would ordinarily serve for one.

page_text: For certain classes of work with parallel sides, I use two tool-holders, each with its
full complement of tools, the slabs or blocks being placed as before described, by this
means two sides of each slab or block can be machined at once.
The tool-holder used may be a modification of the ordinary type with a recess for
each tool, the tools being secured by set-pins or in any ordinary manner.
All or any
of the tools may have a suitable adjusting-screw for finally adjusting it to the work.
In order that my invention may be fully un lerstood, I will now proceed to
particularly describe the same, as applied to a slotting machine, with reference to the
accompanying sheet of drawings, in which the same letters indicate corresponding
parts.
Figure I shews an arrangement of the material, and of the cutting tools suitable for
a vertical slotting machine. A A A A are the distance pieces, and B B B B the slabs
or blocks to be operated upon. CC CC are the tools which are so placed that
each engages with the material at or about the same time. Ď D D D are the
adjusting screws for adjusting the position of the tools separately. E E is the tool-
holder which is attached to the ram of the machine. Adjusting screws may be fitted
to each tool, as shewn in the figure, or only to some of them as may be required.
By means of these adjusting screws the cutting tools can be advanced towards the
work or withdrawn from the same as may be required, when finally adjusted the
tools are firmly held in position by means of the set-screws G G G G.
There may be as many slabs or blocks B B B B as the height of the machine
will allow of, each set of slabs having its corresponding tool. The distance-pieces
A A A A give clearance to the tools at each end of the stroke.
Figures II and III are front and side views of an arrangement of tools and holder
suitable for slotting two sides of the material at once. The various parts are denoted
by the same letters as those in Figure I.
In figures II and III two slabs only are shewn, with the necessary distance pieces ;
as many slabs as required may however be slotted at once by arranging them as
described, and illustrated in Figure I, the only limit to the number of slabs being the
height of the machine.
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 :-
1st. The arrangement of material and tools in slotting planing and other machines,
whereby each slab or set of slabs or blocks, is machined by a separate tool, the said
tools being contained in a tool-box or holder, such that each or any of the tools or all
the tools, is or are capable of separate adjustment, substantially as hereinbefore
described and illustrated."
2nd. A tool-box or holder capable of application to new or existing machines, in
which each or any of the tools or all the tools is or are capable of separate adjustment,
substantially as hereinbefore described and illustrated.
3rd. A fool-box or holder whereby two sides of the material may be operated upon
at once, each or any of the tools or all the tools, being capable of separate adjustment
substantially as hereinbefore described and illustrated.
Did he att 1
1 1000