in mines and other Purposes.
Year: 1886

page_text: in mines and other Purposes.
I, DAVID MILLS of Stone Hill Colliery, Farnworth near Bolton in the County of
Lancaster, Manager, do hereby declare the nature of my said invention to be as
follows
My invention relates to a novel method of strengthening wood props employed
in mines and other purposes and consists in hooping the ends of same with metallic
bands of suitable sections. In the case of long props the centre or otherwise. is
strengthened by suitable metallic bands. The ends of the props are reduced so that
the outside of the metallic bands are flush or thereabouts with the outside of same..
If desired the metallic hoops can be shrunk on the ends without reducing the size
of prop. The metallic bands are shrunk on hot to secure them by contraction.
By the application of this invention a great saving in timber will be effected,
splitting and burring minimised; will also facilitate the operation of drawing them
from the earth.

page_text: Certain Improvements in the Construction of Props Employed
in Mines and other Purposes.
I DAVID MILLS of Stone Hill Colliery, Farnworth near Bolton in the County
of Lancaster Manager, do hereby declare the nature of my said Invention for
"CERTAIN IMPROVEMENTS IN THE CONSTRUCTION OF PROPS EMPLOYED IN MINES
AND OTHER PURPOSES," and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
My invention relates to a novel method of strengthening wood props employed
in mines and other places and consists in hooping the ends of same with metallic
bands of suitable sections. The ends of the props are reduced so that the outside
of the metallic bands are flush, or thereabouts, with the outside of same. If desired
the metallic hoops can be shrunk on the ends without reducing the size of the prop.
In the case of long props the centre, or otherwise, is strengthened by Buitable
metallic bands.
In order that my Invention may be more fully understood and readily carried
into effect I will now proceed to describe the accompanying sheet of drawings
reference being had to the figures and letters marked thereon.
Fig. 1 is a longitudinal elevation of a prop with each end reduced to receive the
metallic hoops B and C, the outsides of which are flush, or thereabouts, with the
outside of the prop.
C.
Fig. 2. In this figure the ends of the prop A are; hooped with the bands, B and C,
without reducing the girth of same.
Fig. 3. This is an arrangement wherein the prop A is reduced at one end to
receive the hoop C, the outside of the latter being flush, or thereabouts, with the
outside of prop. The other end is slightly reduced and tipped with the taper
hoop B.
Fig. 4 is an elevation of a long prop hooped at each end similar to that shewn in
Fig. 1. This prop is provided in the centre, or otherwise, with the hoop D.
Fig. 5 is an elevation of a long prop provided with the hoop D; the ends being
hooped with the bands B and C.
Fig. 6 is an elevation of a long prop hooped at one end and in the centre,
or otherwise, with the hoops B and D without reducing the girth of same; the
other end being reduced to receive the hoop C so as not to exceed the outside of
the prop to facilitate drawing out of the earth, and minimise the risk of danger to
the operator. This prop is shewn taper, such as is in general use in mines, to allow
of the bottom end being reduced to receive the hoop C without diminishing its
strength below that of the top end.
The metallic bands B, C, and D are shrunk on hot to secure them by contraction.
If desired they may be secured by screws or their equivalents. In the case of long
props one or more hoops D may be employed as desired.

page_text: By the application of this invention a great saving in timber will be effected,
splitting and burring minimised, and the operation of drawing them from the earth
facilitated. By hooping props on this system they are considerably strengthened
and their use prolonged.
Having now particularly 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:
The method of strengthening wood props employed in mines and other places by
providing them with metallic bands, substantially as described and shewn on the
drawings or any mere modification thereof.
EDMUND CHADWICK,
Agent for Applicant.