IMPROVEMENTS IN THE MANUFACTURE OP ELLIPTIC SPRINGS FOR CARRIAGES AND OTHER VEHICLES
Year: 1868

page_text: LETTERS PATENT to Joseph Palmer, of Concord, in the County of
Merrimack, and State of New Hampshire, United States of America,
for the Invention of "IMPROVEMENTS IN THE MANUFACTURE OP ELLIPTIC
SPRINGS FOR CARRIAGES AND OTHER VEHICLES."
Sealed the 24th November 1868, and dated the 17th August 1868.
PROVISIONAL SPECIFICATION left by the said Joseph Palmer at the
Office of the Commissioners of Patents, with his Petition, on the
17th August 1868.
I, JOSEPH PALMER, of Concord, in the County of Merrimack, and State
of New Hampshire, United States of America, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE MANUFACTURE OF
ELLIPTIC SPRINGS FOR CARRIAGES AND OTHER VEHICLES," to be as follows:-
My Invention relates to a new and improved method of manufacturing
heads for elliptic springs, and the nature of the said Invention consists
in constructing right and left dies for punching out ears of any required
form or size to be fixed on the ends of the main leaf of an elliptic spring
preparatory to welding, which greatly facilitates the making of heads to
the same.

page_text: The particular form of the dies may be such as to produce an ear
which when welded to the end of the main leaf of an elliptic spring
makes what is termed a French head, but I do not limit myself to this
form of die, but include dies for making round or English heads, or any
other form that can be punched out on this principle with lips to secure
them to the main leaf in process of welding.
In manufacturing my spring head I first strike the right and left
ears by means of the dies and punches above described; I then adjust
them upon the ends of the main leaf. A slight blow of the hammer
upon the lips secures the ears in place, so that they will not drop off
when placed in the furnace for heating preparatory to welding. When
heated to the proper point for welding the ears are firmly welded upon
the said main leaf and finished.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Palmer in the Great Seal Patent Office on
the 17th February 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
PALMER, of Concord, in the County of Merrimack and State of New
Hampshire, United States of America, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of August, in the year
of our Lord One thousand eight hundred and sixty-eight, in the thirty-
second year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Joseph Palmer, Her special license that
I, the said Joseph Palmer, my executors, administrators, and assigns, or
such others as I, the said Joseph Palmer, 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 "IMPROVEMENTS IN THE MANUFACTURE OF
ELLIPTIC SPRINGS FOR CARRIAGES AND OTHER VEHICLES," upon the condition
(amongst others) that I, the said Joseph Palmer, 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
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.
NOW KNOW YE, that I, the said Joseph Palmer, do hereby declare
the nature of my 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 :-
My said Invention is a new and improved method of manufacturing
heads for elliptic springs to be known as "Palmer's new and improved
method of manufacturing heads for elliptic springs."
And the nature of my Invention consists in constructing right and
left dies for punching out ears of any required form or size to be fixed
on the ends of the main leaf of an elliptic spring preparatory to welding,
which greatly facilitates the making of heads to the same.
And the following is a full and exact description of said Invention
and its mode of operation, reference being had to the accompanying
Drawings, of which Figure 1 is a perspective view of the top die or
punch showing a portion of the face cut away at a for the purpose of
forming the. scarf or lip 6 (Fig. 5) which overlaps the steel, as shown
at b, b, (Fig. 6). Figure 2 is a top view of the lower die. Figure 3 is
also a perspective view of a top die or punch showing a projection at c
for the purpose of forming the lip d (Fig. 5); this die or punch with
its corresponding lower die forms the opposite ear to that formed by
the punch and die shown at Figs. 1 and 2. Figure 4 is a plan or top
view of the ear as formed by the matrix of the lower die of Fig. 3.
Figure 5 is a perspective view of an ear formed by Fig. 3 and its lower
die. Figure 6 is a perspective view of the end of an elliptic spring
with the ears fixed ready for welding. Figure 7 is the under side of
Fig. 6 showing the manner in which the ears are held by the lips d, d,
for and during the process of welding. Figure 8 is the finished French
head of an elliptic spring made as above described.
The particular form of the dies shown in the Drawings are for making
that form of an ear which when welded to the end of a main leaf of
an elliptic spring makes what is termed a French head; but I do not
limit myself to this form of a die, but include dies for making the round
or English heads, or any other form that can be punched out on this
principle with lips to secure them to the main leaf in process of welding.

page_text: In the process of manufacture of my spring head I first strike the right
and left ears by means of the dies and punches above described; I then
adjust them upon the ends of the main leaf, as shown at Fig. 6 and 7,
and a slight blow of the hammer upon the lips d, d, (Fig. 7) secures
the ears in place so that they will not drop off when placed in the
furnace for heating preparatory to welding. When heated to the proper
point for welding the ears are firmly welded upon said main leaf and
finished as shown at Fig. 8.
What I claim as my Invention is a new and improved method of
manufacturing heads for elliptic springs consisting of right and left dies
for punching out ears of the required form to be fixed on the ends of the
main leaf of an elliptic spring preparatory to welding.
And I claim the right and left dies constructed substantially as and
for the purpose herein described, and the ears by them manufactured,
and the application of the ears to the ends of the main leaf of an
elliptic spring, substantially as and for the purpose herein set forth.
In testimony whereof, I, the said Joseph Palmer, have hereunto
set my hand and seal.