A new or improved Self-sustaining Device more particularly applicable to Elevating Machines, Cranes, and the like.
Year: 1899

page_text: Date of Application, 23rd Dec., 1899-Accepted, 10th Feb,, 1900
A new or improved Self-sustaining Device more particularly
applicable to Elevating Machines, Cranes, and the like.
I, GEORGE MACKIE BREMNER, of 14, Alma Street, Stockton-on-Tees, Durham, Gentle-
man, 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 relates to a new or improved self-sustaining device more particularly
applicable to elevating machines, lifts, cranes, and the like, the object being to
provide means for preventing motion in or movement of the same when under the
strain of load except such movement or motion as is actually effected by the motive
or driving power.
In carrying the invention into practical effect, the mechanism comprises an outer
case firmly secured to or formed integrally with the frame or pedestal of the machine,
and through which the driving shaft passes. Within this case two discs are arranged,
one of which is furnished with a suitable part or boss projecting through the case, and
which is designed to receive a pinion rope or other driving appliance for transmitting
the power to the machine to be operated upon, while it is also furnished at its outer
edge with a suitable number of flats or inclined planes between which and the inner
edge of the case suitable rollers are arranged. When in operation these two dises
are driven together preferably through the medium of projecting parts of the driving
shaft, so that the whole revolves freely, while in the event of the one disc being
forced by the load faster than the other is driven by the motive power, it immediately
causes the aforesaid rollers to expand by reason of the inclined sections of-the afore-
said disc, which causes the latter to jam and give sustaining result.
In order that this invention may be fully understood, I will now proceed to describe
same with reference to the accompanying drawings in which:
:-
Fig. 1 is a plan of the case containing the mechanism, and which is firmly secured
to or formed integrally with the frame or pedestal of the machine.
Fig. 2 is a front elevation thereof.
Fig. 3 is a front. elevation of the same with the outer cover removed.
Fig. 4 is a similar view with the top disc removed, and Fig. 5 is an underside view
of the said top disc.
Fig. 6 is a cross section through the case and mechanism taken in the direction
of the line 1-2 (Fig. 3) and Fig. 7 is a similar view taken in the direction of the
line 3-4 (Fig. 3).
Like letters of reference indicate corresponding parts throughout the several
views.
In the form of construction shown in the accompanying drawings, the device or
apparatus comprises an outer case a firmly secured to or formed integrally with the
frame or pedestal of the machine, and normally closed by a cover a secured to the
Within the case a,
case a by nuts and bolts d, or in any other convenient manner.

page_text: "
two discs b c are arranged, the disc being furnished with a flange or upstanding
edge be which is cut away at certain suitable points to form slots or recesses 63
designed to receive the rollers 7, while the disc c is furnished' with flats or inclined
sections g at points corresponding with the slots or recesses 63 and the rollers 7,
against which the said disc c bears at these points. This disc is also provided with a
projecting boss or part of passing through the cover a¹ of the case a, and which is
designed to receive a pinion, rope or other driving appliance for transmitting the
power to the machine to be operated upon.
Upon the surface of the disc b raised engagement pieces 11 are formed, corre-
sponding raised engagement pieces c¹ c¹ being formed on the disc c, while the driving
shaft & passes completely through the outer case a and discs a circular boss
or flange s¹ having side wings or extensions 3282being rigidly secured to or formed
integrally with the shaft s, and lying between the aforesaid discs bc.
When the machine is in operation and under normal conditions, as the driving
shaft 8 revolves the side wings or extensions 82 of the boss or flange s¹ bear against
the engagement pieces 1 61 of the disc b and the corresponding engagement
pieces el c¹ of the disc c, so that both are driven together, the rollers being
simultaneously carried round within the slots or recesses 6³ formed in the flange or
edge of the disc b and kept at right angles to the flats or inclined sections g; if,
however, the disc c is forced by the strain or load faster than the disc b is driven
by the motive power, the flats or inclined sections g immediately begin to turn from
their position at right angles to the rollers thereby causing them to expand and
jam against the inside of the case a, which locks the disc c and prevents its
further movement until the rollers are brought back to their normal positions
through the medium of the disc b by the driving or motive power.
The disc b may be formed with a boss has shown (Figs. 6 and 7) contained
within a corresponding recess in the outer case a for the purpose of retaining
it in the required position, and for facilitating its turning movement.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim
is:-
1/. The new or improved self-sustaining device for elevating machines, lifts, cranes,
and the like, consisting of an outer case such as a normally, closed by a suitable cover
such as a and within which is arranged two discs such as bc, the disc b being
furnished with a flange or upstanding edge 62 within which is formed slots or recesses
such as 63 designed to contain rollers such as 2, while the disc c is furnished with
corresponding flats or inclined sections and with an outwardly projecting part or
boss designed to receive a pinion, rope or other driving appliance; and a shaft s
passing completely through the case a and discs bc, with a boss or flange such as 8¹
the extensions 82 82 of which are designed to come against the engagement
pieces b¹¹ and c¹ c¹ of the discs b c respectively and lie between the said discs, the whole
combined, arranged, and operating substantially as herein described and shown with
reference to the accompanying drawings, and for the purposes specified.
2. In a self-sustaining device for elevating machines, lifts, cranes, and the like,
the arrangement within a suitable outer case such as a of two discs such as b C, the
one carrying rollers such as and the other being furnished with a corresponding
.number of flats or inclined sections such as g bearing against such rollers, and with an
outer projecting part or boss such as f designed to receive a pinion, rope or other
driving appliance, substantially as set forth.
3. In a self-sustaining device for elevating machines, lifts, cranes and the like, the
arrangement within a suitable outer case such as a of two discs such as b c furnished
"with raised engagement pieces such as b¹¹ and c¹ c¹, in combination with a driving
shaft such as s running through the case a and discs 6 c, and furnished with a flange
or boss such as shaving wings or extensions 2 82 lying between the said dises a b,
and adapted to come into contact with the engagement pieces b₁, c¹ c¹, for driving
the two discs bc together, substantially as set forth.

page_text: 4/. The combination and arrangement of the parts forming a new or improved self-
sustaining device for elevating machines, lifts, cranes and the like, substantially as
herein described and shown with reference to the accompanying drawings, and for
the purposes specified.
CASSELL & Co.,
22, Glasshouse Street, Regent Street, London, W.,
Agents for the Applicant.