IMPROVEMENTS IN ESCAPEMENTS
Year: 1874

page_text: LETTERS PATENT to Benjamin Joseph Barnard Mills, of the Firm of
Harris and Mills, of 23, Southampton Buildings, in the County of
Middlesex, Patent Agent, for the Invention of "IMPROVEMENTS IN
ESCAPEMENTS."-A communication from abroad by Messieurs Tiffany
and Company, of the City, County, and State of New York, in
the United States of America, and of Geneva, in the Swiss Con-
fadavation
PROVISIONAL SPECIFICATION left by the said Benjamin Joseph
Barnard Mills at the Office of the Commissioners of Patents, with
his Petition, on the 27th November 1874.
.
I, BENJAMIN JOSEPH BARNARD MILLS, of the Firm of Harris and
Mills, of 23, Southampton Buildings, in the County of Middlesex,
Patent Agent, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN ESCAPEMENTS," a communication to me from abroad by
Messieurs Tiffany and Company, of the City, County, and State of New
York, in the United States of America, and of Geneva, in the Swiss
Confederation, to be as follows:-

page_text: the double roller anchor or lever escapement is superior to all others,
but its construction requires so much precision and care that it becomes
very difficult and above all very expensive.
It must be understood that watches and other time keepers_con-
structed with the greatest precision are those herein referred to.
According to the present Invention the "guard pin" ordinarily
employed is dispensed with, and in lieu of forming the end of the lever
into a fork as heretofore such end is pointed and is substituted for the
"guard pin," and acts in connection with the small or safety roller.
Two steel pins are placed on the top part of the lever, or what was
formerly the fork, and these pins receive between them the ruby pin or
impulse pallet of the large or impulse roller. The said ruby pin or
pallet which is usually fixed in a perpendicular position in the large
or impulse roller is according to the present Invention, somewhat
increased in dimensions, and is fixed horizontally in the thickness of and
on the same plane with the large roller. By these means the following
advantages are obtained :-Economy, facility of execution, and simplicity
of construction.
The escapement works very easily and smoothly even if the parts are
not of the most perfect form, and it works as well, if not better, than
others, whilst it requires much less strength, great facilities for regula-
tion, and greater solidity, as the ruby pin or pallet being thicker than
heretofore is not so easily broken by. a more or less violent shock.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Benjamin Joseph Barnard Mills in the Great Seal
Patent Office on the 27th May 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN
JOSEPH BARNARD MILLS, of the Firm of Harris and Mills, of 23, South-
ampton Buildings, in the County of Middlesex, Patent Agent, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of November, in
the year of our Lord One thousand eight hundred and seventy-four; in

page_text: the thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto I, the said Benjamin Joseph Barnard
Mills, Her special licence that I, the said Benjamin Joseph Barnard
Mills, my executors, administrators, and assigns, or such others as I,
the said Benjamin Joseph Barnard Mills, 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 ESCAPEMENTS,”
s," a
communication to me from abroad by Messieurs Tiffany and Company,
of the City, County, and State of New York, in the United States of
America, and of Geneva, in the Swiss Confederation, upon the condition
(amongst others) that I, the said Benjamin Joseph Barnard Mills, 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 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 Benjamin Joseph Barnard Mills, 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 thereof, reference being had to the
3 Drawings hereunto annexed, and to the letters and figures marked
thereon, that is to say :-
It is generally acknowledged. and. most watchmakers are agreed that
the double roller anchor or lever escapement is superior to all others,
but its construction requires so much precision and care that it becomes
very difficult, and above all very expensive.
It must be understood that watches and other time keepers constructed
with the greatest precision are those herein referred to.
"
According to the present Invention, which is represented on an
enlarged scale in plan at Figure 1, and in elevation at Figure 2, the
guard pin" ordinarily employed is dispensed with, and in lieu of
forming the end of the lever A into a fork as heretofore such end is
pointed and is substituted for the "guard pin," and acts in connection

page_text: with the small or safety roller E; two steel pins B, B¹, are placed on
the top part of the lever A, or what was formerly the fork, and these
pins B, B¹, receive between them the ruby pin or impulse pallet O of
the large or impulse roller D. The said ruby pin or pallet C, which is
usually fixed in a perpendicular position in the large or impulse roller D,
is according to the present Invention somewhat increased in dimensions,
and is fixed horizontally in the thickness of and on the same plane with
the large roller D. By these means the following advantages are
obtained-Economy, facility of execution, and simplicity of con-
struction.
The escapement works very easily and smoothly, even if the parts are
not of the most perfect form, and it works as well, if not better, than
others, whilst it requires much less strength, great facilities for regula-
tion, and greater solidity, as the ruby pin or pallet being thicker than
heretofore is not so easily broken by a more or less violent shock.
Having thus described the nature of the said Invention, and the mode
in which the same is carried into effect, I would have it understood that
what I claim is, the peculiar combination and arrangement of parts of a
double roller anchor or lever escapement, substantially as herein shown
and described.
In witness whereof, I, the said Benjamin Joseph Barnard Mills,
have hereunto set my hand and seal, this Twenty-sixth day of
May, in the year of our Lord One thousand eight hundred and
seventy-five.