Year: 1897

page_text: Date of Application, 21st July, 1897
- Complete Specification Left, 6th Jan., 1898--Accepted, 5th Mar., 1898
We, JACOB BARSTOW, WILLIAM LEE BARSTOW, and GEORGE HENRY BARSTOW,
trading as Jacob Barstow and Sons, Filter Manufacturers, of Ferrybridge, in the
County of York, do hereby declare the nature of this invention to be as follows:-
The object of our invention is to construct ladders which may be used either as
step ladders or as long ladders, and which are easily and quickly convertible from
one to the other.
We employ two short ladders one preferably a little longer than the other,
hinged or coupled together one within the other. The second rung from the top
of the longer or main ladder forms the hinge or coupling, and also serves as the
end rung of the other part.
The top rung of the main ladder is made removable, being secured by a nut,
pin, cotter, or other suitable means, so that when the step ladder is extended to
form a long ladder this loose rung may be passed through both parts, thus form-
ing the second rung of the shorter or top ladder, and holding the two parts rigidly
together.
The hinge rung and the loose rung may work in metal bushes or bearings in
cach part of the ladder if required. A chain or other means is provided to pre-
vent the two legs from slipping apart when in use as a step ladder. The rungs
may be made of metal, wood, or any suitable material.
COLL 1
T1
1007
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent for Applicants.
We, JACOB BARSTOW, WILLIAM LEE BARSTOW, and GEORGE HENRY BARSTOW,
trading as Jacob Barstow and Sons, Filter Manufacturers, of Ferrybridge, in the
County of York, 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:―
The object of our invention is to construct ladders which may be used either
as step ladders or as long ladders, and which are easily, and quickly convertible
from
to the other

page_text: Fig. 3 an end elevation of same when closed:
We employ two ladders A, B, one of them, A, being preferably a little longer
than the other ladder B. The said ladders are hinged or coupled together one
within the other, the hinge or coupling bar C, which may be placed behind a
fixed rung D of the main ladder A or may itself serve as the rung, passing through
the end of the shorter ladder B.
The top rung of the main ladder A may be removable so that when the step
ladder is extended for use as a long ladder the said loose rung may be passed through
both parts A and B of the ladder, holding them rigidly together.
Or in place of the top rung being loose a removable coupling bar E, passing
behind a fixed rung F of the shorter ladder B, is used.
The hinge or coupling bar C and the coupling bar E, or the removable rungs
when such are employed, are secured in position by split cotters G, or by pins,
nuts, or other suitable means.
The bars C and E, or the loose rungs when used, preferably work in metal
bushes or bearings H fixed in each side of the ladders A and B.
A chain, cord, or coupling link J is provided to prevent the legs A and B
slipping apart when in use as a step-ladder.
The rungs of the ladders may be of wood, metal, or other suitable material, and
the rungs of the ladder A are preferably provided with recesses K at each side to
allow the ladders A and B to be folded closely together when not in use.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
The combination of the ladder consisting of parts A and B, hinged at C, and
provided with coupling bar E, or the like, so as to be used either as a step-ladder
or as an ordinary long ladder, substantially as shown and described.
1
3
T
1000
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent for the Applicants.
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent for the Applicants.