AN IMPROVED SPRING FOR DOORS AND OTHER PURPOSES
Year: 1867

page_text: LETTERS PATENT to Francis Waller, of Skipton, in the County of York,
Whitesmith, for the Invention of "AN IMPROVED SPRING FOR DOORS AND
OTHER PURPOSES."
Sealed the 8th October 1867, and dated the 9th April 1867.
PROVISIONAL SPECIFICATION left by the said Francis Waller at the
Office of the Commissioners of Patents, with his Petition, on the
9th April 1867.
I, FRANCIS WALLER, of Skipton, in the County of York, Whitesmith, do
hereby declare the nature of the said Invention for "AN IMPROVED SPRING FOR
DOORS AND OTHER PURPOSES," to be as follows:-
My improved spring is constructed as follows, and for doors forms what is
ordinarily termed a spring centre:-Round the stud or pin upon which the
ordinary shoe of the door turns, and which is carried down into the spring
box, I fix a block, the upper face of which is cam shaped; a roller on one
end of a lever bears upon the cam, and the other end of this lever is pivoted,
while a link carried from about its middle connects it below to a spring
preferably composed of a number of superposed plates. In the normal
position the roller bears upon the lowest part of the cam; when the door is
pushed open the roller rides up the incline of the cam, and when the pressure

page_text: against the door is removed the springs draw down the link and consequently
the lever, so that the roller by riding down the incline compels the door to
close.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Francis Waller in the Great Seal Patent Office on the
9th October 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FRANCIS
WALLER, of Skipton, in the County of York, Whitesmith, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Ninth day of April, in the year of our Lord One
thousand eight hundred and sixty-seven, in the thirtieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the
said Francis Waller, Her special licence that I, the said Francis Waller,
my executors, administrators, and assigns, or such others as I, the said
Francis Waller, 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 "AN IMPROVED SPRING
FOR DOORS AND OTHER PURPOSES," upon the condition (amongst others) that I,
the said Francis Waller, 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 Francis Waller, 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 thereof, reference being. had to the Drawings hereunto annexed,
that is to say :--
My improved spring is constructed as follows, and for doors forms what is
ordinarily termed a spring centre:-Round the stud or pin upon which the
ordinary shoe of the door turns, and which is carried down into the spring
box, I fix a block, the upper face of which is cam shaped; a roller on one
end of a lever bears upon the cam, and the other end of this lever is pivoted,

page_text: while a link carried from about its middle connects it below to a spring
preferably composed of a number of superposed plates.
My improved spring is represented in the accompanying Drawings.
Figure 1 is a horizontal section through the line a, b, of Figure 2, and
Figure 2 is a vertical section through the line c, d, of Figure 1.
A is the box in which the spring is fitted; B is the shoe which receives
the corner of the door; and C is the stud or pin upon which the shoe B and
the door turn; this stud rests at bottom in a step or bearing D in the ordinary
Round the stud I fix a block E, shown more clearly in the detached
view Figure 3; the upper face of this block is cam shaped, as seen in the
Drawings. F is a roller on one end of a lever G and bearing on the cam ;
the other end of the lever G is pivotted in a support or bearing H, while a link
I carried down from about its middle, as shewn, connects it to a spring K
composed of a number of superposed plates. In the normal position, that is
to say, when the door is closed, the roller F bears upon the lowest part of the
cam E; when the door is pushed open the roller F rides up one or other of
the inclines of the cam, thereby elevating that end of the lever G which
carries the roller, and also raising the link I and the end of the spring K;
as soon as the pressure against the door is removed the spring K draws
down the link I and lever G, so that the roller F by riding down the incline
of the cam compels this cam with the stud C to move round and thereby
close the door; L, L, are guides to cause the lever G to move in a vertical
plane.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim, constructing
springs for doors and other purposes arranged and acting substantially as
herein-before described and represented in the accompanying Drawings.
In witness whereof, I, the said Francis Waller, have hereunto set my
hand and seal, this Seventh day of October, One thousand eight
hundred and sixty-seven.
FRANCIS WALLER. (L.S.)