A SAFTY STEP LADDER HINGE
Year: 1885

page_text: ALLAN EDMONDSON, Cabenet Maker JOHN BENJAMIN MOORHOUSE Ironmonger,
THOMAS ABRAHAM PROCTER Cabenet Maker, all of Skipton in Craven in the
County of Yorkshire do hereby declare the nature of our invention for A SAFTY
STEP LADDER HINGE to be as follows:-
3
"
This invention relates to certain improvements in hinges of step ladders to be as
follows. By the application of a safty stay as shown in drawings. It prevents
the possibility of the step ladder ever. collapsing with the individual when in use,
thereby rendering them perfectly safe. It is self acting with the opening of the
step ladder, and by a slight upward turn of the stay can be as easily released and
closed. There are no inconvenient projections to interfere with the working of
the step ladder. They can be made to suit all sizes of step ladders.
Round headed revit which fastens the two sides of hinge together forming the
hinge. A (Fig. 1).
Screw holes for securing hinge to step ladder. B (Fig. 1).
Revit securing safty stay to hinge C (Fig. 1).
Safty stay with grove and natch D Fig. 1.
Round headed rivet (E) which is riveted into the leg of hinge and allows the
safty stay to slide free for opening and shutting of hinge also allowing the natch F
(Fig. 2) to fall onto the rivet when open thus securing the safty of step ladder
when in use.
Figure 2 showes the hinge closed.
Figure 3 is an end eleviation of the hinge.

page_text: We, ALLAN EDMONDSON, JOHN BENJAMIN MOORHOUSE and THOMAS ABRAHAM
PROCTER all of Skipton-in-Craven, Yorkshire, Cabinet Maker, Ironmonger and
Cabinet Maker, respectively, do hereby declare the nature of our invention of
A SAFETY STEP LADDER HINGE and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement,
that is to say:-
This invention consists of the application of a safety stay or slotted link to a
step ladder hinge whereby the liability of accident by the said step ladder opening
too far, or slipping and closing or collapsing, is entirely avoided; such being the
nature and object of our invention in order that the same may be clearly under-1
stood we will proceed to describe it, reference being had to the accompanying sheet
of drawings, wherein fig. 1 is a side elevation of step ladder shewing hinge A with
slotted link B attached, and fig. a detailed drawing of hinge and link, enlarged
scale.
The link B is attached loosely or hinged to the arm 1 of the hinge A, its slotted 1
end extending so as to span or loosely engage with the button headed pin 2, the
stem of which passes through and is rigidly fastened to the arm 3 of the hinge A,
so that the said link is held in proper position by the button headed pin 2, yet as
the arms 1 and 3 of the hinge A are moved outwardly and inwardly by the
opening and closing of the step ladder as is well understood, the said link is
allowed by its slotted part, to slide upon the pin 2.
In the upper edge of the slotted part of the link B is cut a notch a or, as will
readily be conceived, more than one notch may be made therein (see fig. 3, a' a¹¹ a¹¹¹),
the said notch being made so as to lay hold of the stem part of the button headed
pin 2 when the step ladder is open or in position for use, from this it will be seen
that the arm 3 of the hinge A, together with the leg 4 of the step ladder, is rigidly
held to the arm 1 and the leg 5 until released by lifting the said link B with its
notch a clear of the pin 2.
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
1. The use and employment of a slotted and notched link in combination with a
step ladder hinge in the manner and for the purposes as herein described and as
illustrated by the accompanying drawings.
2. The combination of a slotted and notched link with a button headed pin and
a step ladder hinge used in the manner and for the purposes as herein set forth and
described.