Improvements in Pug or Mortar Mills.
Year: 1893

page_text: Date of Application, 18th Nov., 1893
Complete Specification Left, 17th Aug., 1894-Accepted, 22nd Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in Pug or Mortar Mills.
I, GEORGE OGLE WALLIS of Ayres Quay Foundry, Bishopwearmouth
Sunderland in the County of Durham, Engineer do hereby declare the nature of
this invention to be as follows :-
My invention relates to improvements in pug or mortar mills and has for its
object the self-discharging of the materials operated upon into barrows carts
trucks or the like as hereinafter foreshadowed.
According to my invention I form the pug mill with a revolving pan with a
central or other discharge hole or holes into which a plug or plugs is or are
designed to be fitted. The plug is arranged so as to be opened and closed at will
by a rod attached to a lever working on a fulcrum and also attached to the same
or an equivalent lever is another rod or rods actuating a scraper or discharging
device.
When the plug is closed the scraper device is raised from the pan allowing the
materials operated upon to pass it and when the plug is raised the scraper is
lowered into the pan so as to guide the materials into the discharge hole and
thence into the barrows carts or trucks underneath.
The usual rollers or crushers are fitted with scrapers for guiding the materials
operated upon and in other respects the inill may resemble mills in ordinary use.
Dated this 17th day of November 1893.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Pug or Mortar Mills.
I, GEORGE OGLE WALLIS of Ayres Quay Foundry, Bishopwearmouth
Sunderland in the County of Durham, Engineer 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:-
My invention relates to improvements in pug or mortar mills and has for its
object the self-discharging of the materials operated upon into barrows carts
trucks or the like as hereinafter foreshadowed.
According to my invention I form the pug mill with a revolving pan with a
central or other discharge hole or holes into which a plug or plugs is or are
designed to be fitted.
The plug is arranged so as to be opened and closed at will by a rod attached to
a lever working on a fulcrum and also attached to the same or an equivalent lever
is another rod or rods actuating a scraper or discharging device.
When the plug is closed the scraper device is raised from the pan allowing the
materials operated upon to pass it and when the plug is raised the scraper is
lowered into the pan so as to guide the materials into the discharge hole and thence
into the barrows carts or trucks underneath.
The usual rollers or crushers and scrapers are fitted for guiding the materials
operated upon and in other respects the mill may resemble mills in ordinary use.

page_text: I will fully describe my invention with reference to the accompanying drawings
in which
Figure 1 shows a sectional elevational view, Figure 2 being a plan view
illustrative of the mode and application of my improvements and in the following
description like marks of reference designate like parts.
Referring to the drawings, A is the pan with a central discharge hole A¹ into
which a plug A' is designed to fit as shown.
On a projection P of the cross bearer C, or of the central piece C¹ of the mill a
lever 3 is mounted as shown on a fulcrum at 4 to operate the rods 5 and 6, the
former of which is connected through the guide block 7 with discharger 8 and the
latter with the plug A' as shown.
In the position shown in Figure 1, the plug is shown closed and the discharger
raised so that the material in the pan can pass freely round and round for grinding
purposes but when it is required to discharge the material or part thereof, by
depressing lever 3 as shown in dotted lines, the plug is raised into the central
chamber 9 and the discharger 8 is lowered into the pan in contiguity to the
ordinary scraper S so as to guide the material towards and through the discharge
outlet hole A¹.
The base-plate 10 is arranged with a receiving orifice 11 and the whole may be
so mounted that barrows or carts as the case may be can be placed under the
discharge hole to convey the material from the pan.
In other respects the pan, rollers or crushers, turning mechanism, scrapers and
other gear may resemble that at present in use in ordinary pug or mortar mills.
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. In pug or mortar mills the combination with the pan of a discharge orifice
fitted with an adjustable plug the said plug being adapted to be raised or lowered
by a lever which synchronously lowers or raises a discharging scraper device 8 the
several parts being arranged combined and adapted for use substantially as and for
the purposes herein set forth.
2. In pug or mortar mills the combination and arrangement of parts for effecting
the self-discharging of the material in the pan through an orifice into carts barrows
or the like substantially as and for the purposes herein set forth.
Dated this 16th day of August 1894.
A. CRAWHALL CHAPMAN,
3, St. Nicholas Buildings, Newcastle-on-Tyne, Patent Agent.