An Improved for the Cutting Wheels of Coal Cutting Machines.
Year: 1899

page_text: I, HUGH TRAIN, of Machan Avenue, Larkhall, Lanarkshire, Coalmaster, do
hereby declare the nature of this invention to be as follows:--
At present it is usual to make the guide for the cutting wheel of a rotary
coal cutting machine in one solid piece or in sections each of which is made in
one solid piece.
Under my invention I make the guide or the sections of the guide with a
bottom or backing piece of steel or iron and a strip forming the working face
of phosphor-bronze or an equivalent metal. The phosphor-bronze strip is pre-
ferably rivetted to the backing piece. There is also screwed rivetted, or other-
wise secured to the guide or the sections of the guide, at the back of the phosphor-
bronze strip, a series of thin strips of steel or other suitable metal so arranged
that as the phosphor-bronze strip wears away one of these steel strips can be
removed from time to time and thereby allow of the guide being properly
adjusted and the relative thickness of its parts properly regulated.
By making the guide with a phosphor-bronze working face which can readily
be renewed when worn through and by having the steel strips which can be
removed one by one as the phosphor-bronze face wears away it (the guide) can
be made to last for a much longer time than the present guides.
The steel strips can be used over and over again.
With the present guides when they are but partially worn through' they bend
and. are thus rendered useless with the result that the machine has to be stopped
and a new guide inserted which takes a considerable time. With my invention
the phosphor-bronze strip can be worn until it is quite thin when it can be taken
off and replaced by a fresh strip which replacement absorbs but a short time.
The foundation or backing piece will last for a very long time as it is not
worn by the action of the cutting wheel.
H. D. FITZPATRICK,
100. Wellington Street, Glasgow,
Agent.
An Improved Guide for the Cutting Wheels of Coal Cutting Machines.
I, HUGH TRAIN, of Machan Avenue, Larkhall, Lanarkshire, Coalmaster, do
hereby declare the nature of this invention and in what manner the same is to
[Price Sl

page_text: be performed, to be particularly described and ascertained in and by the follow-
ing statement:-
At present it is usual to make the guide for the cutting wheel of a rotary
coal cutting machine in one solid piece or in sections each of which is made in
one solid piece.
Under my invention I make the guide or the sections of the guide with a
bottom or backing piece of steel or iron and a strip forming the working face
of phosphor-bronze or an equivalent metal.
The phosphor-bronze strip is preferably rivetted to the backing piece.
In order that my said invention may be properly understood I have hereunto
appended an explanatory sheet of drawings, whereon,
Fig. 1 is a plan view of the guide as made in accordance with my invention.
Fig. 2 is an end view of same.
Fig. 3 is a cross section of the guide taken on the line X-X Fig. 1.
Fig. 4 shows the guide applied to a common type of coal cutting machine.
Under my invention I make the guide a with a bottom or backing piece b
of steel or iron and a strip e forming the working face of phosphor-bronze or
equivalent metal. The phosphor-bronze strip c is rivetted at d to the backing
piece.
As will be seen from Fig. 4 the guide a is bolted, in the usual manner, through
the bolt holes e to the jib or bracket f of the coal cutting machine A.
The phosphor-bronze being expensive a great saving is effected by making
the backing b separate and of iron or steel. With the present guide, which is
cast throughout of phosphor-bronze, when it is but partially worn through it
bends and is thereby rendered useless. With my invention the phosphor-
bronze strip can be worn down until it is quite thin when it can be taken off and
replaced by a fresh phosphor-bronze strip which replacement absorbs but a short
time.
By making the guide with a phosphor-bronze working face which can readily
be renewed when worn through it (the guide) can be made to last for a much
longer time than the present guides.
The foundation or backing b will last for a very long time as it is not worn
by the action of the cutting wheel.
In Fig. 4 B is the cutting wheel of the coal cutter and C the gear wheel for
driving it.
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 consider novel and desire to claim is:-
A guide for the cutting wheels of coal cutting machines having a backing (b)
and a separate working face (c) secured to said backing substantially as and for
the advantages set forth.
Dated this 1st day of November 1899.