IMPROVEMENTS IN SPRING HINGES
Year: 1876

page_text: LETTERS PATENT to John Harrington, of Ryde, in the Isle of Wight, for the
Invention of " IMPROVEMENTS IN SPRING HINGES."
aled the 21st October 1876, and dated the 26th April 1876.
PROVISIONAL SPECIFICATION left by the said John Harrington at the
Office of the Commissioners of Patents on the 26th April 1876.
JOHN HARRINGTON, of Ryde, in the Isle of Wight.
HINGES."
"IMPROVEMENTS IN SPRING
The Invention has for its object improvements in spring hinges. For this purpose
the hinge is formed with a knuckle as heretofore, but according to my Invention
I make such knuckle large enough to receive a coiled or spiral spring, one end of
which is connected to or acts against one leaf or flap of the hinge, whilst the other
end of the spiral spring is connected to or acts against the other leaf or flap of the
hinge.
I also dispense with the usual connecting bolt or rivet, and cause the spiral
spring to fit the interior of the knuckle so as to act in lieu of the connecting bolt
or rivet.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said John Harrington in the Great Seal Patent Office on the 26th October
1876.
JOHN HARRINGTON of Ryde, in the Isle of Wight.
HINGES."
"IMPROVEMENTS IN SPRING
The Invention has for its object improvements in spring hinges. For this purpose
the hinge is formed with a knuckle as heretofore, but according to my Invention
I make such knuckle large enough to receive a coiled or spiral spring, one end of
which is connected to or acts against one leaf or flap of the hinge whilst the other
end of the spiral spring is connected to or acts against the other leaf or flap of the
hinge.

page_text: I also dispense with the usual connecting bolt or rivet and cause the spiral spring
to fit the interior of the knuckle so as to act in lieu of the connecting bolt or
rivet.
And in order that my said Invention may be more clearly understood and readily
carried into effect I will proceed, aided by the accompanying Drawings, more fully
to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical section through the knuckle of a spring hinge constructed
according to my Invention, and Figure 2 is an end view thereof.
a, a¹, are the leaves or flaps of the hinge, and bis the knuckle, which is made
large enough to receive a coiled or spiral spring c, one end of which is connected
to or acts against the leaf or flap a, whilst the other end of the spiral spring is
connected to or acts against the other leaf or flap a¹ of the hinge.
I also dispense with the usual connecting bolt or rivet and cause the spiral spring
c to fit the interior of the knuckle b so as to act in lieu of the connecting bolt or
rivet.
Having thus described the nature of my said Invention and the mode of carrying
the same into effect, I would have it understood that what I claim is, the mode,
substantially as herein shown and described, of constructing spring hinges by fitting
in the knuckles thereof coiled or spiral springs, which in addition to closing the
flaps or leaves of the hinges together also act as substitutes for the connecting bolt
or rivet usually employed.
°
In witness whereof, I, the said John Harrington, have hercunto set my hand
and seal, this Twenty-fourth day of October, in the year of our Lord
One thousand eight hundred and seventy-six.
JOHN HAKKINGTON. (L.S.)