Year: 1886

page_text: Date of Application, 28th Sept., 1886
Complete Left, 16th Apr., 1887.
Complete Accepted, 17th June, 1887.
We ANDREW MUIR of No. 2 Walbrook in the City of London, Engineer and JAMES
HUMPHRYS of Leadenhall Buildings also in the City of London, Engineer & Naval
Architect, do hereby declare the nature of this invention to be as follows:-
Our Invention consists in a novel method of manufacturing screws by rolling
between flat dies; one die is movable and is supported by and travels on a suitable
bed or slide, the other die is fixed, on the movable or travelling die grooves are cut,
the section of such grooves coinciding with the form and pitch of the thread of the
screw to be rolled, the grooves in the travelling die are cut in the direction of and
parallel with the line of its motion, the fixed die is also grooved, the grooves being of
the same form and pitch as on the travelling die; the fixed die is placed at such
angle as shall give the required pitch of the thead on the screw to be rolled the plain
round article or blank on which the thread has to be rolled, so as to convert it into a
screw is introduced between the fixed die and the travelling die, the travelling die is
set in motion and the thread is at once formed on the blank which is thus rolled into
a screw.
Dated this 98th dow of Santamber 1886
HUGHES & SON,
Of 5, Chancery Lane, W.C.,
Agents for the Applicants.

page_text: (......
COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for the Manufacture
of Sorews.
We ANDREW MUIR of No. 2 Walbrook in the City of London, Engineer, and JAMES
HUMPHRYS of Leadenhall Buildings also in the City of London, Engineer & Naval
Architect, 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:—
Our Invention consists in a novel method of manufacturing screws by rolling
between flat dies; one die is movable and is supported by and travels on a suitable
bed or slide, the other die is fixed.
On the movable or travelling die, grooves are cut, the section of such grooves
coinciding with the form and pitch of the thread of the screw to be rolled, the grooves
in the travelling die are cut in the direction of and parallel with the line of its motion,
the fixed die is also grooved, the grooves being of the same form and pitch as on the
travelling die the grooves in the fixed die are placed at such angle as shall give the
required pitch of the thread on the screw to be rolled; the plain round article or
blank on which the thread has to be rolled so as to convert it into a screw is introduced
between the fixed die and the travelling die, the travelling die is set in motion and the
thread is at once formed on the blank which is thus rolled into a screw.
And in order that our Invention may be more clearly understood we have given
reference to an accompanying sheet of Drawings showing a plan of a machine for
manufacturing screws by rolling between flat dies. A is the bed on which the table B
slides. C is the travelling die attached to the table B. D is the fixed die attached to
a suitable support E. The plan shows the table and travelling die ready for
introducing the blank, the table and die are advanced by means of suitable gearing and
the screw is rolled between the two dies and the table is brought back again ready for
the next blank.
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 is :
The Improvements in machinery or apparatus for the manufacture of screws by
rolling between flat dies as herein shown and described.
Dated this 16th day of April 1887.
HUGHES & SON,
5, Chancery Lane, London,
Agents for the Applicants.
HUGHES & SON,
5, Chancery Lane, London,
Agents for the Applicants.