IMPROVED MACHINERY FOR MANUFACTURING SCREWS OR SCREW CAP3 OF SHEET METAL
Year: 1857

page_text: LETTERS PATENT to William Edward Newton, of the Office for Patents.
66, Chancery Lane, in the County of Middlesex, Civil Engineer, for the
Invention of "IMPROVED MACHINERY FOR MANUFACTURING SCREWS OR SCREW
CAP3 OF SHEET METAL"-A cominunination.
Scaled the 29th September 1857, and dated the 21st July 1857.
PROVISIONAL SPECIFICATION left by the said William Edward Newton
at the Office of the Commissioners of Patents, with his Petition, ou
the 21st July 1857.
I, WILLIAM EDWARD NEWTON, of the Office for Patents, 66, Chancery Lane,
in the County of Middlesex, Civil Engineer, do hereby declare the nature of
the said Invention for "IMPROVED MACHINERY FOR MANUFACTURING SCREWS OR
SCREW CAPS OF SHEET METAL," to be as follows:-
This Invention consists in making screws of sheet metal, by chasing them
upon a screw-threaded mandril or chuck placed in a lathe so as to impart
rotary motion thereto.
The lathe used for the purpose of the Invention is in most respects
like the ordinary hand lathe for turning. To make a screw cap, a disc of:
thin sheet metal is placed concentrically between the chuck and the follower,
and held firmly in position by pressure applied to the follower by forcing up
the centre against it. The lathe is then put in motion, and of course, rotates
the metal disc, against which, while rotating, a dull tool is presse 1, in such a

page_text: manner as to force the projecting portion of the disc over upon the periphery
of the chuck, so as to form a closely fitting cup around it. The chuck has a
round threaded screw cut upon its periphery, and after the cup form has been
given to the disc, a chaser (so rounded as not to cut or abrade the metal) is
pressed against the metal. so as to force the sides of the cup into the threaded
form upon the chuck. If a nozzle is required, the disc portion of the cup
may be cut-out; but if a cap is required, the disc is retained. If required the
cup form may be given to the thin metal, which may be afterwards placed
upon the chuck, and the screw thread formed as above, or after the cup forni
is given to the metal it may be placed inside of a chuck threaded internally
instead of externally, and the thread produced in a similar manner as already
described.
SPECIFICATION in. pursuance of the conditions of the Letters Patent, filed
by the said William Edward Newton in the Great Seal Patent Office on
the 20th January 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
EDWARD NEWTON. of the Office for Patents, 66, Chancery Lane, in the County
of Middlesex, Civil Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen, Victoria, by Her Letters
Patent, bearing date the Twenty-first day of July, A.D. One thousand eight
hundred and fifty-seven, in the twenty-first year of Her reign, did, for
Herself, Her heirs and successors, give and grant unto me, the said William
Edward Newton, Her special license that I, the said William Edward Newton,
my executors, administrators, and assigns, or such others as I, the said William
Edward Newton, 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 Invention for "IMPROVED MACHI-
NERY FOR MANUFACTURING SCREWS OR SCREW CAPS OF SHEET METAL," being a
communication from abroad, upon the condition, amongst others, that the
said William Edward Newton, by an instrument in writing under my hand
and seal, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, 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.

page_text: NOW KNOW YE, that I, the said William Edward Newton, 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 (that is to say) :-
This Invention as communicated to me from abroad, consists in making
screws of sheet metal, by chasing them up to a screw-threaded mandril or
chuck, as herein-after more fully set forth.
In the accompanying Drawings, Figure 1 is a plan of the apparatus used,
illustrating the mode of operation; Figure 2 is an elevation, showing like
parts, and illustrating the same thing. Figure 3 is a section in detail, showing
the construction of the chuck and some other parts, and representing the
metal as bent into the form of a cap upon the chuck; Figure 4 is a like view
of like parts, representing the screw cap as completely finished.
A is the frame or shears of a lathe; B is the head stock; C is the mandril
upon which the chuck D is secured, the one represented being of the proper
form and construction to make tops or caps for cans and jars. The lathe used
is in most respects like the ordinary hand lathe used in turning.
To make one of these caps, a disc G of thin sheet metal is placed con-
centrically between the chuck D and the follower E, and held firmly in position
by pressure applied to the follower E, by forcing up the centre F against it.
The lathe is then put in motion, which of course rotates the disc G, against
which, while rotating, is pressed a dull tool H, in such a manner as to force
the projecting portion of the disc over upon the periphery of the chuck D, so
as to form a closely-fitting cap around it. The chuck D has a round threaded
screw cut upon its periphery, and after the cap form has been given to the
disc G, the workman applies a chaser, so rounded as not to cut or abrade the
metal, and by a proper application of pressure forces the sides of the cap into
the threaded form upon the chuck. If a nozzle is required, he cuts out the
disc portion of the cap; but if a cap is required, the disc is retained. By this
mode of forming the screw, the full thickness and nearly or quite the entire
strength of the metal is retained. The foregoing is considered the best modo
of forming screw nozzles, caps, &c., but it is obvious that other modes may be
employed to give the cap form to the thin metal, and that it may be after-
wards placed upon the chuck, and the screw thread formed as above. Or
after the cap form is given to the metal, the said cap might be placed insido
of a chuck threaded internally instead of upon one threaded externally, and
the thread produced in a similar manner, but this modification is not considered
so convenient or good a mode of carrying out the Invention as that first
described.

page_text: Having now set forth the nature of the Invention of improved machinery
for manufacturing screws or screw caps of sheet metal, ns communicated to
me by my foreign correspondent, and explained the manner of carrying tho
same into effect, I wish it to be understood, that under the above in part
recited Letters Patent, I claim forming screws out of sheet metal, by chasing
upon or in a chuck or mandril, substantially as set forth.
In witness whereof, I, the said William Edward Newton, have here-
unto set my hand and seal, the Twentieth day of January, in the
year of our Lord One thousand eight hundred and fifty-eight.