Improvements in Brakes for Cages in Mines and the like.
Year: 1892

page_text: Date of Application, 18th May, 1892-Accepted, 31st' Dec., 1892
COMPLETE SPECIFICATION.
Improvements in Brakes for Cages in Mines and the like.
I ALFRED JUNG of Hoerde a/ Ruhr in the Empire of Germany, 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:-
My invention has for its object to provide an automatic brake for cages in mine
hoists and the like, so that the cage is automatically stopped in its downward
course in case the rope by which the cage is suspended should happen to break.
In the accompanying drawings Figure 1 is a side elevation of the framework of
the cage with brake mechanism, Figure 2 a vertical section through the upper part
of same at right angles to Figure 1, Figure 3 is a plan view of the cage and
section through the bars or beams between and upon which the cage is guided and
shewing the brake actuating mechanism and Figure 4 a horizontal section on
line A B Figure 1. Figure 5 is an enlarged horizontal section on line C D
Figure 1.
The two
The cage having framework consisting for instance of the vertical members F
and the horizontal members G is elastically suspended by the rope A,
shackles H I and K, main rod C, crosshead D and spring B from the crossbeam Fi
at upper end of cage. By the weight of the cage F. G the rod C is normally in
the raised position Figure 2 with the spring B under compression.
opposite sides of the cage are provided with slipper pieces y at top and bottom of
cage which fit easily or loosely against the vertical wooden bars or beams E in the
shaft or well and prevent lateral shake and needless friction of the movable brake
or wedge bars d presently to be described. To each side of the cage is fixed a
trough-shaped iron piece a b, Figure 5, the inner opposite sides of which pieces are
provided throughout their length with wood linings c having serrated inner
surfaces. d d are wooden brake or wedge bars made of a form corresponding to
the said serrated surfaces and affixed to the movable flat iron pieces e which at
their upper ends are suspended by gudgeons & in bearing blocks h capable of sliding
in the forked levers g. The levers g are fixed on the parallel spindles f which
work in bearings in the top member G of the cage. On the spindles are also
fixed the toothed wheel sectors which gear with the toothed wheel sectors m m
fixed on the spindles k k on which latter are also fixed the levers n n opposite to
the wheel sectors m. These levers n are by the jointed links o connected to the
aforesaid crosshead D. The brake or wedge bars d are at their middle and bottom
portions guided by pins p which slide in slanting slots q.
In case the rope A or other pulling device connected thereto should break the
spring B will rebound and draw the main rod C down, the cross head D thereon
will pull the links o down and by means of the levers n, the tooth sector
wheels m and I and the levers g raise the brake bars ed so as to bring their wedge
parts d to act against the serrated or wedge shaped faces c and thereby cause the
iron pieces e to grip between them the vertical wooden bars E in the well or shaft,
thus arresting the cage in its downward course.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
A brake for cage lifts, hoists and the like consisting essentially in an arrange-
ment of movable serrated brakes which by the action of a spring, cross head,
connecting links. toothed sectors shofte and lowow

page_text: the cage to be stopped as soon as the rope or equivalent holding same happens to
break, substantially as hereinbefore described and as shewn in the accompanying
drawings.
Deted this 10th day of Mow 1000
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.