Process for the Preparation of Stone, Marble, Granite, Syenite, Sandstone, and the like for Pillars, Pedestals, Door and Window Cases, Monuments, and the like or other Objects.
Year: 1896

page_text: Date of Application, 13th July, 1896-Accepted, 10th Oct., 1896
COMPLETE SPECIFICATION.
Process for the Preparation of Stone, Marble, Granite, Syenite,
Sandstone, and the like for Pillars, Pedestals, Door and
Window Cases, Monuments, and the like, or other Objects.
I, KARL HERGENHAHN of 4, Hafenstrasse Ludwigshafen-on-the-Rhine, in the
Empire of Germany, Stone Quarry and Grinding-mill Proprietor, 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:-
Masonry intended for use for building purposes such as pillars, pedestals, door
and window cases, and also monuments and stone-work of various kinds (in marble,
granite, syenite, sandstone and the like) has hitherto always first been treated in a
stoneworks or in the stone mason's yard-where it is taken in rough-hewn blocks-
by means of chisel hammer notched chisel double-pointed pick and so forth then
roughly dressed and surfaced and not till these various operations have taken place
is it smoothed and polished.
This invention relates to a process by which all this preliminary preparation
which is very costly is rendered unnecessary.
This new process consists in performing all the necessary work and finishing the
object which is being manufactured (according to the design which is being worked
to) solely by grinding the work (by means of known or suitable devices including
machines rubbers and grinding materials and implements) on those surfaces which
will be visible when the work is finished.
Objects produced according to this process only require to be dressed by the
stone mason on their bases and other joining or abutting parts and at the back
by means of stone axes chisels and the like although as the back is generally
intended to be covered no dressing at all will probably be necessary for that
portion.
It is obvious that by the employment of this new process an important economy
in cost of labour is effected and also (and this is especially important) in time.
A special advantage which objects made according to my improved process
possess is that the said objects as turned out and without polishing have an
impermeable and durable surface thus permitting of the employment of a less
expensive material such for example as stone which is not capable of receiving a
polish which by my process is made suitable for use in a much better class of work
than hitherto.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A process for manufacturing masonry (from marble, granite, syenite, sand-
stone and the like) for pillars pedestals door and window cases, monuments and the
like or other objects which process consists in producing the finished object or
surface from the stone or the like us it leaves the quarry in rough undressed blocks
or pieces or in fitting the said object for further treatment such as fine polishing
and the like if so desired (without employing saws chisels stone axes or the like)
solely by grinding said stone or the like substantially as and for the purposes
hereinbefore described...

page_text: 2. Stone or the like objects of all kinds (such as pillars pedestals door and
window.cases monuments and the like) prepared on those faces which are intended
to be visible solely by grinding without any previous treatment by means of saws
stone axes or chisels and the like, from stones such as marble granite syenite sand-
stone and the like in their rough hewn state."
Dated this 11th dow of July 180R
TONGUE & BIRKBECK,
Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Applicant.