Improvements in and relating to Buffers, Cam Sticks, and the like for Stamp Batteries.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to Buffers, Cam Sticks, and the like
for Stamp Batteries.
I, JAMES DICK, of Greenhead, in the County of the City of Glasgow, Manufacturer,
do hereby declare the nature of my invention to be as follows:-
This invention has reference to improvements in and relating to the manufacture
or production of buffers or bumpers, cam sticks, and the like used in the batteries
of gold and other mines.
According to my improvements I first take canvas and impregnate it on both
surfaces with gutta percha solution and heat.
I then cement two or more of the canvas layers together by heat and pressure,
and I form these layers into the articles required by cutting them into suitable
shape and by heat and pressure cement and bind them together within suitable
moulds.
In making buffers or bumpers, I use the impregnated layers, preferably in the
form of three cemented together, and these I punch or stamp out into disc or
circular shape, with a hole or orifice in the centre. These discs are then heated
and placed with their centre holes over a central stem or spindle placed inside a
cylindrical mould, and a top cap is placed over these on the central stem and
subjected to pressure to cement and consolidate all the discs into one cylindrical
article with a central hole through it to form the buffer or bumper.
In the case of cam sticks, a series of layers are taken of a suitable size and these
are heated and placed on the flat and subjected to pressure within a suitable mould,
a slit or opening being cut out of the central part of their one end.
Dated the 29th day of April 1897.
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.
Improvements in and relating to Buffers, Cam Sticks, and the like
for Stamp Batteries.
I, JAMES DICK, of Greenhead, in the County of the City of Glasgow, Manufacturer,
do hereby declare the nature of my invention and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement, that is to say:-
This invention has reference to improvements in and relating to the manufacture
or production of buffers or bumpers, cam sticks, and the like, used in the batteries
of cold and other mines.

page_text: According to my improvements I first take canvas and impregnate it on both
surfaces with gutta percha solution and heat. I then cement two or more of the
canvas layers together by heat and pressure, and I form these layers into the articles
required by cutting them into suitable shape and by heat and pressure cement and
bind them together within suitable moulds.
And in order that my said invention and the manner of carrying same into
practice may be properly understood, I have hereunto appended a sheet of explana-
tory drawings in which Figure 1 represents a sectional elevation and Figure 2 a
plan view illustrating a buffer or bumper as being formed in a mould in accordance
with my improvements, and Figure 3 is a plan view of one of the discs while
Figures 4 and 5 represent longitudinal and end views respectively of a cam stick
as formed in accordance with my improvements.
Referring to these drawings:-
In making buffers or bumpers, I use the impregnated layers preferably. in the
form of three cemented together, and these I punch or stamp out into disc or
circular shape a, with a hole or orifice a¹ in the centre. As shown in Figures 1
and 2 these discs are then heated and placed with their centre holes a¹ over a central
stem or spindle 61 placed inside a cylindrical mould b and a top cap b² is placed
over these on the central stem a¹ and subjected to pressure to cement and con-
solidate all the discs a into one cylindrical article with a central hole through it
to form the buffer or bumper.
In the case of cam sticks as shown in Figures 4 and 5 a series of layers a are
taken of a suitable size and these are heated and placed on the flat and subjected
to pressure within a suitable mould, a slit or opening being cut out of the
céntral part of their one end.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed, I declare that what I
claim is:-
1
First. The manufacture of battery buffers, cam sticks, and the like, in 'the
improved manner herein set forth.
Second. Battery buffers, cam sticks, and the like, made from layers of canvas
impregnated with gutta percha solution and consolidated together, substantially as
set forth.
Dated the 25th day of Innuam 1898
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.