Improvements in Stone Planing Machines.
Year: 1898

page_text: Date of Application, 11th May, 1898
Complete Specification Left, 10th Feb., 1899-Accepted, 11th Mar., 1899
PROVIDIUNAL
DE MULTICATION.
Improvements in Stone Planing Machines.
I, JAMES GILMOUR FAULDS, Junior, of 50, North Albion Street, Glasgow, Mason,
do hereby declare the nature of this invention to be as follows:-
This invention relates to stone planing machines.
Stone planing machines, as at present constructed, have one or more cutters
or planes, which, as the table carrying the stone is reciprocated back and for-
ward, cut or plane the surface of the stone. The cutters consist of a single piece
of steel with a square end or handle, which is fitted into a tumbling socket on
the machine. When the cutters or planes are slightly worn or blunted, they have
to be taken out of the machine and their cutting edges re-tempered and sharpened.
My invention has for its object to obviate the removal of the cutters from
the machine and of the frequent re-tempering and sharpening.
In carrying out my invention, I make the handle or holder of the cutter with
a dovetail or other like shaped slot or recess at its forward cutting end, and in
this slot or recess, I fit a removable cutter or bit. The cutter, which is made of
very hard steel, preferably stamped out, has one cutting edge and is shaped so
as to be readily inserted in the dovetailed slot or recess at the end of the holder.
The cutting edge of the cutter may be constituted by a series of teeth which
may be of any suitable shape.
The cutter, if desired, may be made flat on the one side and inclined at the
other side so as to lock into a correspondingly shaped slot in the tool holder.
Any other modified arrangement of a dovetail joint may be used instead of those
before described.
If desired the cutter may be made to interlock by means of a groove and tenon
or key and recess or equivalent joint arrangement.
My improvements enable the cutting surfaces to be renewed as often as required,
without taking out or removing the cutter holder, and without stopping the
machine for any lengthened period to get the cutting edges tempered or sharpened.
Dated this 10th day of May 1898.
Improvements in Stone Planing Machines.
I, JAMES GILMOUR FAULDS, Junior, of 50, North Albion Street, Glasgow, Mason,
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:.
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This invention relates to stone planing machines.
Stone planing machines, as at present constructed, have one or more planes,
which, as the table carrying the stone is reciprocated back and forward, cut or

page_text: plane the surface of the stone. The planes consist of a single piece of steel with
a square end or handle which is fitted into a tumbling socket on the machine.
When the planes are slightly worn or blunted they have to be taken out of the
machine and their cutting edges re-tempered and sharpened.
My invention has for its object to obviate the removal of the planes from the
machine and of the frequent re-tempering and sharpening.
And in order that my said invention may be properly understood I have here-
into appended an explanatory sheet of drawings, whereon,
Fig. 1 is a plan view of the improved plane."
Fig. 2 is a side view of the same.
Fig. 3 shows a slightly modified construction.
Fig. 4 shows in side and end view one form of 'cutter.
Fig. 5 shows another form of cutter in side and end view. "
Fig. 6 shows a third form of cutter in side and end view.
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Fig. 7 is a section of the jaw of the holder for the cutter Fig. 6. with a cutter
therein.
In carrying out my invention, instead of making the plane all in one piece,
I use a handle or holder a which can be fitted into the tumbling socket of the
machine and which is provided with a broadened part a¹ at its forward end having
a dovetail or other like shaped slot or recess b made in it for the reception of a
removable cutter or bit c. The cutter, which is made of very hard steel and
preferably stamped or cut out with a die, has one cutting edge and is shaped so
that it can be readily inserted and held in the dovetailed slot or recess at the end
of the holder.
The cutting edge of the cutter may be constituted by a single cutting edge or
by a series of teeth c¹ (see also Fig. 4) which may be of any suitable shape.
The cutter c, is preferably made of a wedge shape as shown at Figs. 2 and 4
and so as to readily lock in the slot 6 of the holder; or it may be made flat on
the one side and inclined at the other side so as to lock into a correspondingly
shaped slot which would, in this latter case, require to be made in the holder.
If so desired the cutter may be made as shown at Figs. 3 and 5, that is, it may
be wedge shaped at its lower side e² and be provided with a dovetailed part ³
which can lock into the dovetail slot 6 (Fig. 3) of the holder.
The cutter may be made of a diamond shape in section as shown at Fig. 6
in which case the slot b of the holder would be made, as shown at Fig. 7, that
is, with a constricted mouth so as to hold the cutter in place. In this case the
cutter, which would preferably have both of its tapered sides provided with
teeth c¹, can be taken out of the slot b and reversed whenever one side is worn.
The cutters are inserted in the slots b from the side.
My improvements enable the cutting surfaces to be renewed as often as
required without taking out or removing the cutter-holder from the machine,
and without stopping the machine for any lengthened period to get the cutting
edges tempered or sharpened.
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 consider novel and desire to claim is:
In stone planing machines the application and use in conjunction with holders,
such as a a¹, of cutters (c) which can be removably fitted into slots (b) made
in the holders, substantially as herein before described with reference to Figs. 1
to 7 of the drawings annexed.
Dated this 8th day of February 1899
H. D. FITZPATRICK,
100, Wellington Street, Glasgow, Agent.