Improvements in Machine Tools for Moulding Stone.
Year: 1899

page_text: Date of Application, 5th Aug., 1899-Accepted, 9th Sept., 1899
COMPLETE SPECIFICATION.
Improvements in Machine Tools for Moulding Stone.
We, CHARLES COLLINS and ERNEST COLLINS, both of Central Drive, Blackpool,
in the County of Lancaster, Contractors, 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:―
This invention has for its object to provide a machine tool for moulding stone
wherein the cutter is rendered interchangeable and adjustable and which can
be made more accurate and at considerable less cost than those hitherto in use.
And in order that our invention may be more fully understood we have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a side view partly in section and Fig. 2 an end view of our improved
stone moulding tool complete. Fig. 3 is a sectional end view with cutter and
back irons removed. Fig. 4 a side view of one of the back irons, Fig. 5 a
side view of the filling or abutment piece for the cutter, and Figs. 6 & 8 side
views and Figs. 7 & 9 end views respectively of two different forms of moulding
cutters.
In carrying out our invention and referring to the figures generally our
improved stone moulding tool consists of a holder a having a single recess b
adapted to receive a moulding blade c and two back irons d, d the former being
employed between the latter.
The said moulding blade and the two back irons are jointly secured in the holder
by means of a cap c fitting into the said recess and by two bolts f₁f passed
through holes formed in the holder and the said cap and provided at each end
with a washer 9 and nut h, see more particularly Figs. 1, 2 & 3.
The cutting edge of the moulding blade c is profiled in accordance with the
design of mould to be cut on the stone, and a filling piece i employed on the
bolts ff in the holder a, against which the moulding blade c abuts so as to
keep the latter the required distance from the bevelled edge of the back
plates d, d and parallel therewith.
The back irons d, d serve to strengthen the moulding blade e so as to be able
to stand any pressure required and are slightly set back from the moulding
blade c and their lower edges bevelled and profiled conform with the design of
the moulding blade so as to give great support along the whole of the cutting
edge of and allow the moulding blade to cut clear.
The cutting edge of the moulding blade c may be profiled to any desired design
and in lieu of forming the said blade with one cutting edge only, it may be
formed with two, as shown in Figs. 8 & 9 and thus made reversable.
The tool described is secured to the planing machine in the usual way.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1st. In machine tools for moulding stone, the combination of a moulding

page_text: blade c with two back irons d, d the said moulding blade being adjustable and
the said back irons adapted to strengthen the cutting edge of the moulding
blade and the whole secured to the holder by means of a cap e, washers g, g at
each side and bolts fif passing through the same, all substantially as set forth.
2nd. In a machine tool such as specified in the preceding claim, the filling
or abutment piece i employed between the back irons d, d on the bolts f,f,
all substantially as set forth.
1
1000
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicants.