A Self-acting Brake for Cranes, Winches, and other Lifting or Lowering Apparatus.
Year: 1893

page_text: Date of Application, 14th Mar., 1893-Accepted, 22nd Apr., 1893'
COMPLETE SPECIFICATION.
A Self-acting Brake for Cranes, Winches, and other Lifting or
Lowering Apparatus.
I, HEINRICH KOLL, of 64, Paulinen Allee, Hamburg, in the German Empire,
Engineer, 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 relates to an improved brake for cranes, winches, and other lifting
apparatus, and has for its object to attain a quiet and regular speed of descent of
the loads.
For this purpose I make use of the following apparatus, reference being made
to the accompanying drawing in which:
Fig. 1 is a side view, and
Fig. 2 an end view of the apparatus.
The brake-disc b fixed to the shaft a is provided on its inner side with two
weights c c turning on spindles & d. To these weights are attached angle levers e e
turning on pivots on the supports attached to the disc b, the other arms of these
levers being provided with forked ends, and playing in guides in the sliding block
of the coupling piece g. A third angle lever is also attached to the sliding
block, and is pivotted to a support p, its other arm being connected to the brake
handle k by the connecting rod i. A brake-band is attached to and is actuated
by k in the usual manner.
The action of the apparatus is as follows:
On the load attached to chain m being lowered the disc b is revolved, and when
the speed of descent becomes too great, the weights cc, acting under centrifugal
force fly out towards the circumference of the disc b, drawing the coupling and
sliding block g towards the disc, by means of the angle levers ee. The movement
of the block g towards the disc throws the horizontal arm of the angle lever h
down, which through connecting-rod i and brake handle k tightens the brake
bandon the disc b, thus retarding its motion and giving a quiet and regular
descent to the load.
A sliding weight n can be affixed to the handle k by which means the rate of
descent can be regulated at will, according as to whether the weight is nearer to
or farther away from the ends of the handle.
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. A self-acting brake for use with cranes, winches and the like, by which the
rate of descent can be retarded and regulated at will, substantially as herein
described with reference to the accompanying drawings.
2. In the self-acting brake that is above claimed: the combination of the fly-
weights c, the coupling-box g, moving axially on the shaft a, angle levers e e,
connecting the same and an angle lever h transmitting the motion of the coupling-
block y to the brake handle k, substantially as herein described with reference to
the accompanying drawings.
3. In the self-acting brake that is above claimed: the use of angle levers e e
and h for transmitting the motion of the fly weights c to the coupling block g and
thence to the brake handle k, substantially as herein described with reference to
the accompanying drawings.
4. In the self-acting brake that is above claimed: the use of a sliding weight n
attached to the brake handle. for the purpose of regulating the rate of speed as

page_text: desired, substantially as herein described with reference to the accompanying
drawings.
Dated thin 14th dose of M 1902
HEINRICH KOLL,
By Geo. Thos. Hyde,
4, Moorfields, Fore Street, London, E.C. Agent for the Applicant.