Year: 1899

page_text: I, PHILIP DAWSON, of the Firm of George Dawson & Sons, Haughton Mills
and Implement Works, Darlington, in the County of Durham, do hereby declare
the nature of this invention to be as follows:-
My invention relates to ladders formed in two or more lengths hinged together
so that they may be folded upon one another when the ladder is not in use, and
has for its object to effect such hinging of the parts in a simple, efficient, and
secure manner.
With this object I shape the ends of each pair of lengths of a ladder in such
manner that when placed together end to end they will make an approximately
v-shaped joint when viewed from the side.
On the end of each of the sides of each length is secured a metal socket of
suitable length and those of the one length are hinged to those of the other
at the back of the ladder, by forming on each of those of one length a pair of
eyes and on each of those of the second length a single eye, which, when the
parts are placed together, fit between the two pairs of eyes on the first mentioned
length, and are secured thereto by short bolts passing through each set.
From each of the sockets of one length projects a lug at the front of the
ladder, which when the ladder is opened, fits over an eye-piece, one of which is
formed on each of the sockets of the second length so that the two lengths may
be rightly locked in the open position of the ladder by passing a bar through
the two eye-pieces, and this bar, when desired, may form one of the rungs of
the ladder.
1
4
I, PHILIP DAWSON, of the Firm of George Dawson & Sons, Haughton Mills
() and Implement Works, Darlington, in the County of Durham, 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;
-
My invention relates to ladders formed in two or more lengths hinged together
EO that they may be folded upon one another when the ladder is not in use, and
CD 871

page_text: has for its object to effect such hinging of the parts in a simple, efficient, and
secure manner.
With this object I shape the ends of each pair of lengths of a ladder in such
manner that when placed together end to end they will make an approximately
V-shaped joint when viewed from the side.
On the end of each of the sides of each length is secured a metal socket of
suitable length and those of the one length are hinged to those of the other
at the back of the ladder, by forming on each of those of one length a pair of
eyes and on each of those of the second length a single eye, which, when the
parts are placed together, fit between the two pairs of eyes on the first mentioned
length, and are secured thereto by short bolts passing through each set.
From each of the sockets of one length projects a lug at the front of the
ladder, which when the ladder is opened, fits over an eye-piece, one of which is
formed on each of the sockets of the second length so that the two lengths may
be rigidly locked in the open position of the ladder by passing a bar through
the two eye-pieces, and this bar forms one of the rungs of the ladder.
My invention will be more easily understood and carried into practical effect by
reference to the accompanying drawings, of which―
Fig. 1 is a front view, and Fig. 2 a side view of a portion of a ladder formed
in two lengths hinged together according to my invention. Fig. 3 is a side view,
Fig. 4 a front view, Fig. 5 a back view, and Fig. 8 a side view (open) of the hinge
drawn to a larger scale.
As illustrated in Figs. 1 and 2, the adjoining ends of the two lengths of the
ladder are fitted with metal sockets a, each pair of which is hinged together at the
back by a pair of lugs b on one, and a single lug 61 on the other, through which
a bolt c passes.
The adjoining ends of each pair of sockets are approximately V-shaped, and
one of said sockets is provided with a projecting lug d straightened by a web
when desired, which is adapted to fit over an eye-piece e on the other.
By means of said lugs and eye-pieces the sockets are locked together when the
ladder is opened, by passing through the eye-pieces the cranked ends of a loose
rung f, which rung is then turned inwards into such position that its ends rest
against projections g on the two lower sockets.
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:―
(1) Ladders formed in two or more lengths hinged together substantially as
described and illustrated in the accompanying drawings Figs. 1 and 2.
(2) Hinges for hinging together the parts of a ladder formed in two or more
lengths each consisting of a pair of sockets hinged together and having their
adjoining ends shaped to make an approximately V-shaped joint and provided with
means for locking them in position substantially as described and illustrated by
the accompanying drawings, Fig. 3, 4, 5 and 6.
CASTLE SMITH,
"Invention" Office, Mitre Court, Fleet Street, London, E.C.,
Agent for the Applicant.