Year: 1886

page_text: I SAMUEL GERISH of Buttesland Street East Road City Road in the County of
Middlesex Engineer do hereby declare the nature of this Invention to be as
follows:-
My improvements relate to hinges known as Gerish patent hinges both, to the
double action and to the single action hinge. The double action hinges as heretofore
made are formed of three plates hinged together. One outer plate being hinged to
one edge of the central plate and the other outer plate to the opposite edge of the
central plate and all the plates drawn together by means of a chain attached to the
centre of one outer plate being led through a hole in the centre of the middle and of
the other outer plate and then attached to a rod around which is placed a strong spiral
spring to bear at one end against this outer plate and the opposite end against a pin
passed through the rod near its outer end. The whole of the spring and rod has also
been enclosed in a tubular casing projecting outwards from the centre of the outer
plate.
In the single action hinge the construction has been the same except that in place
of three plates there are only two plates hinged together.
According to my present invention in place of making the outer end of the coiled
spring to bear against a pin passed through the rod I cut a screw thread around the
rod and screw on to its end a long tube having a head on its outer end and make this
head to bear against the outer end of the spring.
A tubular casing by which the spring is enclosed I make open at its outer end and
allow the head of the long tubular nut to project out from it so that it may readily be
turned by a key or spanner.
In this way the strength of the spring hinge can be readily adjusted to any strength
required simply by screwing up or unscrewing the nut. The hinge when made in
this way can also be put together much more readily than when formed in the manner
heretofore adopted.
In place of using a long tubular nut to screw on to a screw rod secured to the
chain the arrangement might be reversed and the chain be secured to a tube screwed
internally and a headed screw rod be screwed on to it.
CARPMAEL & Co.,
Agents for the Applicant.

page_text: Improvements in Spring Hinges.
SAMUEL GERISH 28 Buttesland Street East Road London N. Engineer do hereby
declare the nature of this invention and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
This invention consists in an improved method of holding the Spring in its place
in Spring Hinges hitherto known as Gerish's Patent No. 7383 dated 30th May 1837.
The original way of so doing was by pressing the Spring along a link chain withia
round rod at the end of the said chain and a small hole at the end of the said rod
through which hole was fixed an iron pin or wire which kept the Spring already
pressed from coming back. My invention consists in doing away with the pin or
wire which holds the Spring and in place thereof I form the rod into a screw and
have a long hollow nut screwed internally to fit the said screwed rod, now having
passed the chain with the screwed rod attached through the Spring I pass the long
hollow nut down the Spring and crew it on to the screwed rod, while so screwing
the Spring becomes shorter or compressed and consequently stronger, by this means
the Spring becomes adjustable and can be made weak or strong according as the nut
is screwed or unscrewed.
Having now particularly described and ascertained the nature of my said Invention,
and in what manner the same is to be performed, I declare that what I claim is :-
The forming the end of the Chain into a screw and having a long cylindrical nut to
fit the same.