An Improved Safety Gripping Apparatus for Cages, Hoists, and the like.
Year: 1897

page_text: Date of Application, 17th July, 1897
Comolate Cannifination Loft 25th Feb 1898 Accepted. 2nd Apr., 1898
PROVISIONAL SPECIFICATION.
An Improved Safety Gripping Apparatus for Cages, Hoists, and
the like.
JAMES HENRY GREEN, Engineer, Bank Terrace, Thornhill Lees, Dewsbury,
Yorkshire, do hereby declare the nature of this invention to be as follows:-
I do hereby declare the nature of this invention to be as follows. On each side of
a cage or hoist which is guided by wire rope guide bars as used in collieries and
mines I attach a gripping apparatus to work in connection with each guide rope
and each guide rope passes through its own gripping apparatus in such a manner
that a pulley cam which is fixed on a pin attached to a lever which again is attached
to the link by which the cage is lifted that when the cage is suspended the pulley
cam does not touch the guide rope but when the rope breaks a spring which is
attached to the above mentioned lever in a suitable position causes the pulley cam
to engage the guide rope and thereby press the guide rope on to a specially prepared
pad which is fixed to receive it the face of this pad and pulley cam have spiral
projections upon them to engage the rope more effectually without injury.
Dated 16th July 1897.
JAMES HENRY GREEN.
An Improved Safety Gripping Apparatus for Cages, Hoists, and
the like.
JAMES HENRY GREEN, Engineer, Bank Terrace, Thornhill Lees, Dewsbury,
Yorkshire, 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 invention in question is a catch apparatus for lifts of every description.
The same consists chiefly of an eccentrically placed disc which by means of lever-
work is brought into connection with the pulley rope, so that if the same breaks,
the lever work influenced by its own weight or by force of springs falls down
whereby the eccentric disc places itself against the guide and so the lift is fixed.
By the accompanying drawing the object of the invention is represented thus.
Figure 1 The front view of a lift provided with the object of the invention.
Figure 2 From the side whilst Figure 3 gives the side view of the lift apparatus.
Figure 4 represented in the plan. The catch apparatus placed at both sides
of the lift consists of catch disc (b) placed in a frame (a) by means of a shaft (c).
On the shaft (c) sits the lever (d) on this the lever (e Figure 3) which again sits on
the lever fixed to the lift (f).

page_text: The spring (h) is in case of rope-breaking to pull down the lever in the dotted
position (Figure 3).
If the pulling rope breaks by any cause the lever work falls down by its own
weight and influenced by the force of the spring disc (6) places itself against the
guide which presses it against the lining (2). Disc (b) and lining (1) receive such
a profile that the same lies exactly against the grooves of the twisted rope (k) so
that the rope is not damaged.
Should in place of the guide rope (k) guide beams be provided the disc (b) and
lining (2) may also be provided with teeth or something of the kind which press
themselves at the breaking of the rope into the wood and so prevent any slipping.
The simple and sure-acting catch-mechanism may be applied to both sides of
each lift.
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. Catch apparatus for lifts indicated thereby that in case of breaking of
the rope a lever work is set at liberty which presses by its own weight or by the
influence of a spring an eccentric placed disc (b). "
2. The eccentric or disc contains upon its face a number of spiral projections
which are made to correspond with the grooves in the twisted guide-rope to which
they are fitted to.
3. There is also provided a loose pad which is placed behind the guide-rope to
receive it and on the face of the pad there are also spiral projections which
receive the rope on its broad surface. The pad being loose it may be replaced in
a few minutes.
4. By the under-claimed catch apparatus a form of execution of the eccentric
disc (b) and the lining, (2) indicates that the same is provided with ribs which press
exactly in the grooves of the twisted rope (k) and so stop the same without
damaging it.
Dated the 22nd day of February 1898.