Improvements in or relating to the Working of Stone, such as Marble, Granitė, Syenite, Sandstone, and the like into Pillars, Pedestals, Door and Window Cases, Monuments, and the like, or other kinds of Stone Work.
Year: 1896

page_text: Date of Application, 7th Aug., 1896-Accepted, 10th Oct.,
1896
COMPLETE SPECIFICATION.
Improvements in or relating to the Working of Stone, such as
Marble, Granitė, Syenite, Sandstone, and the like into Pillars,
Pedestals, Door and Window Cases, Monuments, and the like, or
other kinds of Stone Work.
I, KARL HERGENHAHN of No. 4 Hafenstrasse, Ludwigshafen-on-Rhine, in the
Empire of Germany, Quarry and Grinding-mill Owner, 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 :-
The present invention is a modification of or improvement on the process
described in my former Application filed the 13th July 1896, No. 15520.
In the said former application I have set forth a method by which the stone to
be worked such as marble, granite, syenite, and sandstone may be formed into
pillars, pedestals, door and window cases, monuments and the like from blocks or
pieces of the stone as it leaves the quarry that is to say split and roughly dressed
only directly by grinding and thereby dispensing with the usual treatment in the
stone-yard and by chisels granulated hammers, double-pointed picks, toothed
planes, etc., in the stone-mason's yard whilst the invention which forms the subject
of the present application consists in permitting the treatment of the work to be
considerably simplified by substituting for the method of dressing the stone by
means of three distinct kinds of hammers and chisels that is to say coarse, medium,
and fine the employment of the coarse and in some cases the medium hammer and
toothed plane or coarse drag only and suppressing the treatment with the fine
hammer and drag or surface chisel.
Granite and syenite especially when the methods hitherto adopted in this
industry are employed absolutely require a three-fold treatment by means of the
said hammers that is to say by coarse, medium, and fine hammers in order to fit
them for polishing.
The present improved process consists in treating the roughly split and dressed
blocks or pieces of stone by means of the coarse or at most the coarse and
medium hammers and toothed and coarse scraping chisel or drag and then finishing
the work by grinding.
Having thus 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 :-
1. The modification in the process described in my former Application of
13th July 1896 No. 15520 for the manufacture of pillars, pedestals, door and
window cases, monuments and the like and various kinds of stone-work from
marble, granite, syenite, sandstone and the like such modification consisting in
taking the stone as it leaves the quarry that is to say in roughly split and dressed
blocks or pieces and treating same on those surfaces which will be visible when
the work is in place by means of the coarse or coarse and medium hammer and
then with the toothed or coarse scraping iron or drag after which they are
prepared (ready for surfacing and polishing) by grinding alone substantially as
and for the purposes set forth.
2. Stone work objects of various kinds such as pillars, pedestals, door and
window cases, monuments and the like manufactured according to the hereinbefore
described method which consists in treating them upon those surfaces which are

page_text: intended to be visible by working the roughly dressed marble, granite, syenite,
sandstone and the like by means of coarse or coarse and medium hammers and
then by toothed or coarse scraping chisels or drags dispensing with the employment
of fine surfacing instruments and scrapers and finishing the work by grinding alone
substantially as and for the purposes described.
Dated this 31st day of July 1896.
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.