Improvements in the Utilization of Slate, Slate Waste, Black Grit, or other similar or like Waste Materials, and in the Manufacture of Glass and other Articles therefrom
Year: 1888

page_text: Improvements in the Utilization of Slate, Slate Waste, Black
Grit, or other similar or like Waste Materials, and in the
Manufacture of Glass and other Articles therefrom
WO WILLIAM JOHN PARRY of Coetmor Hall, Bethesda Bangor in the county of
Carnarvon Gentlem in and JOHN THOMAS WFLOH of 32 Peny bryn Bethesda in the
county of Carnarvon, Gentleman, do hereby declare the nature of this invention and
in what in inner the same is to be performed, to be particularly described ind
ascertained in and by the following statement
-
The nature of our said invention for improvements in the utilization of slate and
slate waste, also black grit (which almost invariably is concomitant with slate) or other
similar or like waste materials and in the manufacture of glass and other articles
theretrom
In the slate quarries of Wales and elsewhere there are vast quantities of slate and
slate debris which are too small or too cracked or unsplitable, and also great quintities
of chippings and Blach grit which are accumulated in the manufacture of Roofing and
other slates, and the utilization of this enormous quantity of waste has long been
argently needed and desired
Now we have found that if this slate or its concomitant Black grit or other like
material, be ground up by Pulverizers, Disintegrators or other suitable Machinery
and then mixed with "cullet" (Broken Glass) in the proportion of say 10 lbs to the
100 cwt of Slate or Black Grit, or either 10 ounces of Manganese per 100 owt to ict
as a Flux and then placed in a Glass or other suitable Furnace, either in Crucibles or
Melting Pots and then fired to fusion and then manipulated by the methods at present
in use, or otherwise as may be found most desirable for the purpose, it will make
excellent Transparent Glass and by a small addition of Colouring Oxides, excellent
Mosaic and other such ornamental Tiles, Fancy Glass articles in use for domestic
purposes and various kinds of other articles or goods can be produced

page_text: The following is an Analysis of Slate as also of the different kinds of Gliss in
general use
11
The advantages gained by our Invention are
Firstly The bencficial aid to a desired utilization of materials which at presont
form vast w iste Binks covering large areas of valuable land and creating unsightly
and expensive waste heaps
Secondly The employment of a large amount of labour in an entirely new industry
18 given
Thirdly The important assistance our Invention will render to the development and
improvement of State Quarries and the Slite Trade by enabling that which at present
forms a costly draw back to the working of Quarries to become source of Profit
Fourthly The release for Building or other purposes of large Areas of valuable land
and to some extent dispensing with the danger of vast loose waste Banks
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 18
First The Utilization of Waste or refuse Slate and Black Grit or other like waste
material by Grinding, pulverising or disintegrating the same and then firing the same
substantially as herein described and for the purpose or purposes stated
Second The minufacture of Glass and other Articles from Ground Slate and Black
Grit combined or separately and submitted to heat in Crucibles or Melting Pots and
fired to fusion and then manipulated by the ordinary methods in use, or otherwise, for
the manufacture of different kinds of Glass and other articles in manner as herein
described
ST 1000