An Improved Step Ladder.
Year: 1891

page_text: Date of Application, 5th Dec., 1891
Complete Specification Left, 3rd Oct., 1892-Accepted, 5th Nov., 1892
PROVISIONAL SPECIFICATION.
An Improved Step Ladder.
JOHN CALLIE Joinery Works 8 Roscommon Street Liverpool JAMES BROWN
Window Blind Manufacturer 83 Jamaica Street Glasgow do hereby declare the
nature of this invention to be as follows:-
:-
Two or more distinct ladders with narrow treads are secured to each other in
parallel position by four or more iron or other metal straps which are pivoted top
& bottom to their sides by screws, rivets, rods or otherwise. The top straps are
cranked & have extended arms which are securely fastened to the sides of the back
strut of the ladder, thereby taking the place of ordinary hinges.
By this arrangement the whole forms one united ladder which expands or
collapses with the stretching or closing of the back strut by one motion of the
hand. The spread of the back strut is also determined in position & cords
dispensed with, as by the construction the pressure put on the tread forces the back
strut into position while it is only allowed to go to its limited distance.
To secure greater rigidity in large sizes jointed arms are pivoted from the back
strut to one or more of the treads of the ladder & which collapse, when ladder is
closed, underneath the treads where they are pivoted.
Dated this 4th day of December 1891.
JOHN CALLIE,
8, Roscommon Street, Liverpool.
JAMES BROWN,
83, Jamaica Street, Glasgow.
COMPLETE SPECIFICATION.
An Improved Step Ladder.
We,
JOHN CALLIE Builder and JAMES BROWN, Window Blind Manufacturer
of 83 Jamaica Street, Glasgow, Scotland 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:—
Our invention relates to an improved step ladder, and consists in having two or
more distinct ladders with narrow treads secured to each other in parallel position
by two or more metal straps on each side. These straps are cranked and are
pivoted to the side of the ladder, the top straps having extended arms which are
screwed or otherwise fastened to the sides of the back strut of the ladder, thus
taking the place of ordinary hinges.
In order that our invention may be properly understood and readily carried into
effect we have hereunto appended an explanatory sheet of drawings which we will
now proceed to describe.
Figure 1 is a perspective view showing our improvements.
Figure 2 is a side view showing the ladder in a collapsed form.
A, B are the two ladders with the narrow treads C. D are the metal straps
pivoted at a, a¹ which connect the two ladders A, B together, while D' are the
arms connecting the back strut E to the ladders.
It will be seen that by this arrangement the whole forms one united ladder
which expands or collapses with the stretching or closing of the back strut E by
one motion of the hand, the use of cords being also dispensed with.
It will also be observed that so long as there is any pressure on the treads the

page_text: back strut will remain in position, while at the same time it cannot go beyond its
proper distance.
To secure greater rigidity in large sized ladders jointed arms are pivoted from
the back strut to one or more of the treads of the ladder.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The step-ladder constructed substantially as described and shown on the annexed
drawings.
Dated this 1st day of October 1892.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicants' Agents.