IMPROVEMENTS IN VOLUTE SPRINGS
Year: 1866

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office, No. 8, Southampton Buildings, Chancery Lane, in the County of
Middlesex, Civil Engineer, for the Invention of "IMPROVEMENTS IN
VOLUTE SPRINGS."-A communication from abroad by John Freeland
and Daniel Ward, both of New York, United States of America.
Sealed the 12th March 1867, and dated the 21st November 1866.
PROVISIONAL SPECIFICATION left by the said George Haseltine at the
Office of the Commissioners of Patents, with his Petition, on the
21st November 1866.
I, GEORGE HASELTINE, of the "International Patent Office," No. 8,
Southampton Buildings, Chancery Lane, in the County of Middlesex, Civil
Engineer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN VOLUTE SPRINGS," a communication, to be as follows:-
The nature of the said Invention consists in a volute spring formed of a
plate or strip of metal of suitable size by cutting the said plate or strip
longitudinally for a greater portion of its length, the line of separation being
at or near the centre of the width of the plate or strip, the separated parts
being divaricated or spread apart and the plate rolled up, whereby a double
volute spring is obtained which possesses a great degree of elasticity, is strong,
durable, and not liable to fracture. A plate or strip of steel or other suitable
metal of the required size is cut longitudinally at or near the centre of its

page_text: width for nearly its entire length. The two parts formed by this separation
are divaricated or spread apart a short distance. The plate thus prepared is
ready for rolling, and when steel is used the said plate by preference is first
heated and then rolled or wound round a rod or mandril. The rolling is
commenced at either the split or whole end according to the form of spring
desired. At whichever end the rolling or winding is commenced a double
volute spring is formed. By this mode of construction a volute spring is
obtained possessing great elasticity, strength, and durability. Two springs
are in effect combined in one which gives decided advantages over a spring
made from a single plate or strip so as to form one continuous spiral.or
scroll.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Haseltine in the Great Seal Patent Office on the 20th
May 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," No. 8, Southampton
Buildings, 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 November, in the year of our
Lord One thousand eight hundred and sixty-six, in the thirtieth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said George Haseltine, Her special licence that I, the said George
Haseltine, my executors, administrators, and assigns, or such others as I, the
said George Haseltine, 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 "IMPROVE-
MENTS IN VOLUTE SPRINGS," a communication to me from abroad by John
Freeland and Daniel Ward, both of New York, United States of America,
upon the condition (amongst others) that I, the said George Haseltine, 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
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

page_text: and advantageously carried into practice I claim, a volute spring formed of a
single plate or strip of metal cut or divided longitudinally for a portion of its
length, the two separated parts being spread apart or divaricated, and the plate
or strip rolled up, substantially as herein set forth.
In witness whereof, I, the said George Haseltine, have hereunto set
my hand and seal, this Twentieth day of May, One thousand eight
hundred and sixty-seven.
GEORGE HASELTINE. (L.s.)
Witness,
Jos. W. SHELDON.