Year: 1899

page_text: Date of Application, 30th Mar., 1899
Complete Specification Left, 1st Jan., 1900-Accepted, 17th Feb., 1900
I, THOMAS DUCKWORTH, of Riley Street Saw Mills, Blackburn, in the County
of Lancaster, Joiner and Builder, do hereby declare the nature of this invention
to be as follows:-
This invention relates to certain improvements in step-ladders, and cinsists of
an improved construction of the same, and of an improved method of jointing
the hinges.
The top cross stay of the back legs of my improved step ladder occupies a posi-
tion parallel with the top step when the ladder is open, and is fixed to the back
legs flat with the top step, instead of being placed edgewise with the back legs
as common with other steps. By this means, I obtain a wider step. at the top
than usual.
The bottom cross stay I also fix flat to the back legs, and extending from one
cross stay to the other as aforesaid, I mortice into and fix thereto a longitudinal
down stay of wood to give additional strength, and also to serve the purpose herein-
after described. In the said longitudinal down stay I form a longitudinal slot.
I now run in a groove underneath one of the steps of the ladder, a bolt from
side to side of the step, and secure the same by a nut. Then I form an eye at
each extreme end of a V shaped round iron bar, which is to serve for maintaining
the back legs of the ladder in an extended position. This V shaped iron bar
is passed through the longitudinal slot in the down stay, the point of the Vor
rather its curved end working in the said slot, whilst its two eyes are now slipped
over the bolt underneath the step (previous to the nut being tightened thereon)
and between the sides of the ladder.
The joint or hinge is of novel construction. It consists of two pieces of metal.
One of these is bored at one end, and at the other is formed with a pin. The
other piece of metal is formed with a round socket to fit on the pin, and is also
bored at its other end. Through the bored ends of the hinge or joint on one
side is passed a cross bolt running through the sides of the ladder, and under-
neath the top step, and similarly a cross bolt passes through the hole bored in
the other part of the hinge, and runs underneath the cross stay of the back legs.
In both instances, the bolts are secured by nuts, and may run in grooves, in the
step and cross stay respectively.
"
2000
RICHMOND & Co.,
Chartered Patent Agents, 12, Standish Street, Burnley.

page_text: .
I, THOMAS DUCKWORTH, of Riley Street Saw Mills, Blackburn, in the County
of Lancaster, Joiner and Builder, 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 relates to certain improvements in step ladders, and consists of
an improved method of jointing the hinges.
The joint or hinge consists of two pieces of metal. One of these is bored at
one end, and at the other is formed with a pap. The other piece of metal is
formed with a round socket to fit on the pap, and is also bored at its other end.
Through the bored end of the hinge or joint on one side is passed a cross bolt,
running through the sides of the ladder, and underneath the top step, and simi-
larly, a cross bolt passes through the hole bored in the other part of the hinge,
and runs underneath the cross stay of the back legs. In both instances, the bolts
are secured by nuts, and may run in grooves, in the step and cross stay respec-
tively. These grooves are sufficiently deep to resist pressure against the cross
stays, when tightening up the nuts.
in the accompanying drawings,
Fig. is a perspective view of a portion of a step ladder fitted in accordance
with my invention, and Figs. 2 and 3 are elevation and plan respectively of my
improved method of jointing the hinges.
To constitute the hinge I cast two pieces of metal M and N formed with square
holes and P respectively at their outer ends Figs. 2 and 3. The piece M is cast
with a socket Q, whilst the piece N is cast with a pap R, which is intended to
serve as the joint of the hinge. When the parts are fixed, the pap R enters the
socket Q, and the projecting part S enters a recess formed in the side piece of
the ladder, and prevents play of the hinge, except at the joint.
The hinge is fixed by means of bolts passing through the holes and P, and
underneath the top stay and top step of ladder respectively, when it is then
secured to a corresponding hinge at the opposite side of the ladder by means of
nuts, whereby absolute security is afforded.
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 improved construction of hinges of step ladders, substantially as shewn
and described.
.
0011 1
1000
RICHMOND & Co.,
Chartered Patent Agents, 12, Standish Street, Burnley.