Improvements in or connected with Safety Rolling Step Ladders.
Year: 1892

page_text: Date of Application. 21st Jan., 1892-Accepted, 12th Mar., 1892
COMPLETE SPECIFICATION.
Improvements in or connected with Safety Rolling Step Ladders.
I, CHARLES HERCULE DAMASE SINCENNES of 39 Jurors Street in the City
of Montreal, District of Montreal and Province of Quebec, Dominion of Canada, .
Gentleman 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 of improvements in or connected with rolling step ladders
whereby they are rendered safer, more durable, and less expensive in their
manufacture than hitherto.
According to my invention I combine with the store-shelving or the like with
which the step-ladder is to be used an upper and a lower guide or rail presenting
unobstructed travelling surfaces along their under and upper sides respectively and
on the step ladder I mount grooved rollers in such positions that they travel along
the underside and upper side respectively of the said guide or rail.
I will describe my said invention with reference to the accompanying drawing in
which Fig. 1 is a perspective front view and Fig. 2 is a side elevation of the
arrangement according to my invention.
A. is the upper guide rail carried by brackets A' from the face of the shelving B
and projecting downwards as shewn so as to present an unobstructed travelling
surface along its bottom edge.
B' is the usual counter ledge of the shelving and B is the lower guide rail
secured to the said counter ledge and presenting an unobstructed travelling surface
along its top edge. The said lower rail may however be carried on other suitable
projections from the lower part of the shelving or the like.
C is the step ladder (which may be of any ordinary or suitable construction)
carrying on the arms D, D, near the upper ends of its side bars, grooved
rollers D D which travel along under the rail A. Similar arms E E towards
the lower part of the ladder carry grooved rollers E¹ E' to travel on the rail B'.
The rails A and B2 are situated (as shown in Fig. 2 for instance) so as to cause
the ladder to be at the most desirable angle for use.
It will be apparent that this ladder, being confined between the upper and
lower guide rails (on the latter of which it is supported) will always run smoothly
as its whole weight is supported from below and it cannot possibly be dislodged
by accident.
I am aware that step ladders carrying upper rollers to travel along an upper
railing and lower rollers at their bottom ends to travel along a rail placed on the
Hoor some distance from the shelving are in use and I therefore lay no claim
such construction.
•
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed. I declare that what I
claim is:
1. The combination with store-shelving or the like of upper and lower guides or
rails carried thereby and a step ladder provided with upper and lower rollers
guaged to travel between the said guides or rails all arranged substantially as
hereinbefore described and illustrated by the accompanying drawings.

page_text: 2. The arrangement and combination of parts as and for the purpose hereinbefore
described and illustrated in the accompanying drawings.
Dated this 21st day of January 1892.
J. H. JOHNSON & Co.,
47; Lincoln's Inn, Fields, London, W.C., Agents.