Improvements in and relating to Stone Dressing Machinery.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Stone Dressing Machinery.
I, GEORGE ANDERSON,' of the Firm of George Anderson and Company, Taymouth
Engineering Works, Carnoustie, in, the County of Forfar, Scotland, Engineers and
Founders, do hereby declare, the nature of this invention to be as follows:-
-
This invention relates to improvements in stone dressing machinery of the type
in which the stone is placed and properly secured upon a table which is made
to traverse backward and forward beneath a cross-slide carrying cutting tools, that
is to say the, machine is somewhat similar to an iron planing machine.
The object of my invention is to counterbalance the weight of the cross-slide
and its appurtenances.
In existing machines the cross-slides are not counterbalanced and in conse-
quence their weight, which is considerable, is sustained by the vertical adjusting
screws which soon wear loose in their nuts. It is true provision is made for bolt-
ing the cross-slides to their guides and if this is properly looked to, the defective
work arising from worn screws and slack slides is not so apparent. The defective
work referred to is, that the surface of the stone is not planed perfectly flat due to
the tool holder rising up when the tools come in contact with the end of the stone,
such rise being dependent upon the slackness of the slides and the screws.
In carrying out my invention, I counterbalance the cross-slide and its appur-
tenances so that there will be no weight on the vertical screws, or indeed, I may
make the counterweights so heavy that they may cause the cross-slide to press, to
some extent, in a vertical direction; that is to say in the opposite direction to
that to which it would naturally incline...
Doted this 9th don of Nuvambor 1997
Improvements in and relating to Stone Dressing Machinery.
I, GEORGE ANDERSON, of the Firm of George Anderson and Company, Taymouth
Engineering Works, Carnoustie, in the County of Forfar, Scotland, Engineers and
Founders, 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 relates to improvements in stone dressing machinery of the type

page_text: in which the stone is placed and properly secured upon a table which is made
to traverse backward and forward beneath a cross-slide carrying cutting tools, that
is to say the machine is somewhat similar to an iron planing machine.
The object of my invention is to counterbalance the weight of the cross-slide
and its appurtenances.
In existing machines the cross-slides. are not counterbalanced and in conse
quence their weight, which is considerable, is sustained by the vertical adjusting
screws 10, which soon wear loose in their nuts. It is true provision is made for
bolting the cross-slides to their guides and if this is properly looked to, the defec-
tive work arising from worn screws and slack slides is not so apparent. The
defective work referred to is, that the surface of the stone is not planed perfectly
flat, due to the tool holder rising up when the tools come in contact with the end
of the stone, such rise being dependent upon the slackness of the slides and the
screws, that is to say the tools rise when commencing to cut the stone and fall
when leaving it, causing the ends of the stone to be rounded off.
And in order that my said invention and the manner of performing and carry-
ing the same into effect or practice may be properly understood, I have hereunto
appended two explanatory sheets of drawings in which the same reference numerals
are used to indicate corresponding parts in all the figures where shown.
Figure 1, (Sheet 1) is a side elevation and Figure 2, (Sheet 2) is a view looking
in the direction of the arrow A, (Figure 1) of a stone dressing machine, showing
how the counterweight is applied.
In carrying out my invention, I counterbalance the cross-slide and its appur-
tenances 11, so that there will be no weight on the vertical screws 10, or indeed
I may make the counterweights 12, so heavy that they may cause the cross-slide
to press, to some extent, in a vertical direction; that is to say in the opposite
direction to that to which it would incline. The chains 13, which connect the
counterweights and the slides 11, pass over pulleys carried by brackets 14. The
counterweights slide up or down in guides 15, preferably made of angle irons
braced together. These guides are not perfectly vertical but are, as shown in
Figure 1, slightly inclined in order that the weights may be retained between
their guides.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what
I claim is:
In stone dressing machines, the combination and arrangement of parts, for
counterbalancing the weight of the cross-slide and its appurtenances, substantially
as herein before described and illustrated by the annexed drawings.
Dated this 29th day of inv 1898
GEO. C. DOUGLAS & Co.,
41, Reform Street, Dundee, Agents for Applicant.