IMPROVEMENTS IN LATHES.
Year: 1860

page_text: LETTERS PATENT to William Edward Gedge, of the Firm of John
Gedge & Son, of 4, Wellington Street South, Strand, in the County of.
Middlesex, Patent Agents, for the Invention of "IMPROVEMENTS IN
LATHES. A communication from abroad by Frédéric Gustave Pierret
Delouette, de Vouziérs, Ardennes, France.
-
Sealed the 24th August 1860, and dated the 6th March 1860.
PROVISIONAL SPECIFICATION left by the said William Edward Gedge
at the Office of the Commissioners of Patents, with his Petition, on the
6th March 1860.
I, WILLIAM EDWARD GEDGE, of the Firm of John Gedge & Son, of 4,
Wellington Street South, Strand, in the County of Middlesex, Patent Agents,
do hereby declare the nature of thé said Invention for "IMPROVEMENTS IN
LATHES," communicated to me from abroad by Frédéric Gustave Pierret
Deloutte, de Vouziérs, Ardennes, France, to be as follows:-
By means of a to-and-fro movement given to the ordinary shaft of a doublo
bearing lathe by an excentric, the rod of which is attached to a balance lever,
it is proposed without the use of any special mandrill to adjust straight pieces,
such as squares, triangles, and other rectilineal forms such as flutings, cogs,
keys, and other. It is further proposed to fit a mandril on the nose or end
of the shaft, which by means of a half circle protractor divided into degrees
may take any inclination necessary, having at the same time a plate which

page_text: may form excentric, and also a plate moving on its centre. It will be readily
understood that a piece placed on the lathe may take, by the aid of a platform
in divisions on the extreme left of the lathe, every imaginable position, and
that the motion now rectilineal, now circular, of the lathe will permit the
workman to form pieces more exact than can be obtained with the file,
however well handled. It is proposed to term this lathe "universal parallel
lathe," because it unites the ordinary turning lathe, the fluting or rifling
machine, the planing machine, (in some degree) the machine for making
cogs straight, and at every possible angle a dividing machine, and to a certain
extent the machine used to guiloshce or produce waved work. The come-
and-go motion may be communicated directly to the excentric, it may even be
given by a gearing acting directly on a flat instead of a round jacket, but
it will then become impossible to lengthen or shorten the movement, a power
which in practice it will be found very useful to retain.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Edward Gedge in the Great Seal Patent Office
on the 3rd September 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
EDWARD GEDGE, of the Firm of John Gedge and Son, of 4, Wellington Street
South, Strand, in the County of Middlesex, Patent Agents, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixth day of March, in the year of our Lord
One thousand eight hundred and sixty, in the twenty-third year of Her
reign, did, for Herself, Her beirs and successors, give and grant unto
me, the said William Edward Gedge, Her special licence that the said
William Edward Gedge, my executors, administrators, and assigns, or such
others as I, the said William Edward Gedge, my executors, administrators,
and assigns, should at any time agree with, and no others, from time to time
and at all times thereafter during the term therein expressed, should and
lawfully might make, use, exercise, and vend, within the United Kingdom of
Great Britain and Ireland, the Channel Islands, and Isle of Man, an Inven-
tion for "IMPROVEMENTS IN LATHES," communicated to me from abroad by
Frédéric Gustave Pierret Delouette, de Vouziers, Ardennes, France, upon the
condition (amongst others) that I, the said William Edward Gedge, my
executors or administrators, by an instrument in writing under my, or their,
or one of their hands and seals, should particularly describe and ascertain the

page_text: nature of the said Invention, and in what manner the same was to be per-
formed, and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said William Edward Gedge, do hereby
declare the nature of the said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the Sheet of Drawings hereunto
annexed and forming part of this my Specification, and to the figures and
letters of reference placed thereon, similar letters denoting similar parts in
each of the Figures respectively:
:-
Independently of the work which may be executed using the ordinary lathe,
it is possible by this improved lathe to shape every sort of piece, no matter
what form, with a precision and certainty which has never been attained with
the file; thereby affording economy of time, certainty of execution, and perfect.
finish. This improved lathe combines in the simplest manner the planing
machine, the grooving machine, a machine for making cogs straight and at
all possible angles, a dividing machine, and finally a guillochee machine or
rose engine. And this is obtained by communicating to the shaft of an
ordinary turner's lathe bearing upon double cusbions a come-and-go move-
ment following the axis of the shaft, which is here done by a rod moved by
an excentric. This movement already permits the cutting of straight cogs
or the forming of plane surfaces upon a piece set in the lathe, and the perfect
execution of these cogs is obtained by means of a divided platform at the
extremity of the lathe. And if on the nose of the shaft be adjusted a knee
mandrel to which (by means of a half circle divided into degrees) any desired
inclination may be given, and which bears at the same time a centre dis-
connecting plate, and another one which is made to revolve on its centre. It
will be readily understood that by the aid of the divided platform at the end
of the lathe every imaginable position may be given to the piece to be
operated upon, and that the double movement, circular and rectilineal at will,
will allow such piece to be shaped in every way and with the greatest precision,
whereas this could not hitherto be executed without extreme difficulty, a great
amount of labour, and considerable loss of time.
DESCRIPTION OF THE DRAWINGS.
A, A', axis of the shaft of the lathe; B, supports of the shaft in which
are adjusted the double cushions; C, press screw to secure the cushions;
D, D', D", pulleys serving (aided by cordage) to communicate the circular

page_text: movement to the shaft and consequently to the assemblage of pieces fixed to
the shaft; E, barrel, fixed upon the shaft by the press screw F, held in
position by the knife G; H, divided platform or circle fixed to the shaft of
the lathe and serving to put this shaft in position by means of the alhidade I ;
J, plate, forming excentric by means of the slides K, K', K", and of the recall
screw L (Figures 1 and 4). M, plate with strong stem becoming excentric
by the action of the plate J; N, plate which may be inclined to any angle by
means of the half circle divided into degrees O (Figures 1 and 2); P, press
screw serving to fix the half circle O and consequently the plate N; Q, plate
moving on its centre by means of the endless screw R, (Figures 1 and 2);
S, tapped nose or spindle of the same calibre as the nose of the shaft, and on
which is mounted the object to be turned, grooved, or otherwise shaped
(Figures 1 and 2); T, support as in ordinary lathes; U, counter point;
V, supports of the cogs or gearing giving the rectilineal movement (Figures
1 and 3) V', fly wheel regulating the movement of the gearing; X, fixed
pulley driven by a band X', and which by means of the cogs X", X"", moves
the excentric plate Y, and consequently the rod Z; Y', slide in which enters
the end of the rod, and by which its course is lengthened or diminished
(Figures 1 and 8). a, point at which the rod is attached to the barrel E
(Figures 1 and 3); b, stop key keeping the shaft in place by means of the
groove b'.
In witness whereof, I, the said William Edward Gedge, have hereunto
set my band and seal, this Third day of September, in the year of our
Lord One thousand eight hundred and sixty.
Witness,
JOHN GEDGE,
11, Wellington Street, Strand,
London.
W. E. GEDGE. (L.S.)