Improvements in Lifts, Hoists, Pulley Blocks, and the like.
Year: 1890

page_text: Date of Application, 11th Nov., 1890
Complete Specification Left, 29th July, 1891-Accented 29th Aug
4001
PROVISIONAL SPECIFICATION.
Improvements in Lifts, Hoists, Pulley Blocks, and the like.
I, EDUARD WILLIAM SANT of 14 Southchurch Lane, Bishop Auckland, in the
County of Durham Engineer do hereby declare the nature of this invention to be
as follows:-
My invention relates to an improved sustaining appliance for lifts, hoists, pulley
blocks, crab winches, cranes, and like apparatuses.
In carrying my invention into effect I employ a cast iron box, of circular form,
provided with a detachable lid. Within the box two discs are mounted, one side of
cach being angularly faced, and grooved for the retention of steel balls, for the
purpose of reducing friction. One disc is connected to a rope or chain gear, or to
a toothed wheel, and the other disc is free. The spindle or shaft which passes
through the box, carries a clutch, which may engage with stops upon the free disc,
causing it to rotate when the load is imposed. Said spindle or shaft is supported
by a suitable frame.
I may arrange the discs so that the inclined or angular parts are upon the
periphery instead of the face as beforementioned.
Dated this 11th day of November 1890.
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicant
COMPLETE SPECIFICATION.
Improvements in Lifts, Hoists, Pulley Blocks, and the like.
I, EDUARD WILLIAM SANT of 14 Southchurch Lane, Bishop Auckland, in the
County of Durham Engineer do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
My invention relates to an improved sustaining device for lifts, hoists, pulley
blocks, crab winches, cranes, and like apparatuses.
In order that my said invention may be the better understood I have appended
the accompanying sheet of drawings in which
Figure 1 represents a sectional elevation of a chain hoist to which my invention
is applied, and Figure 2 is a part end view. thereof.
Figures 3, 4 and 5 are details shewn as detached from the apparatus.
In carrying my invention into effect, I employ a box B of cast iron or of other
suitable material, of circular form, provided with a detachable lid A. Within said
box is mounted two discs, C and C₁, shewn more particularly by the detached views
Figures 3 and 4. The disc C¹ is keyed to the spindle S carrying the pinion P
which gears with the spur wheel W, driving the chain or sprocket pulley V, or in
other cases I may cause said disc C to be directly connected to the chain or sprocket
pulley V without the intervention of gearing. The other disc C is loosely mounted
upon a sleeve D shewn also by Figure 5. Said sleeve D is supported by the
spindle S but is not attached thereto. Upon the free end of D is keyed a hand,
ope, or chain wheel E, and the other end is provided with two clutched jaws a a¹
Figure 5, which fit within the spaces between the projections bb¹ on the inner face
f C, as shewn by Figure 4. The exterior faces of the two discs C and C¹, which
re nearest to the faces of the box B formed by it and the lid A., are turned so as
o be flat and true, but the inner faces of said discs are shaped so as to present a
eries of undulations or inclined planes, as shewn by the side views Figures 3 and 4.
[Price 6d.]

page_text: A groove c is formed in each of these faces, so that when placed in position as shewn
by Figure 1, said groove c may be filled with steel balls d for the purpose of
reducing friction. The manner in which the device as herein described is caused
to sustain a load imposed upon the wheel V is as follows:-
The clutch jaws a al upon the sleeve D are so placed that when the wheel E is
operated by hand, or by a chain or rope, the respective positions of the undulations
upon the surfaces of C and C₁ are so that the projecting portions of one face
coincide with the depressions of the other, and the motion of E is communicated
to V without undue friction. When, however, the tension upon the wheel_E_is
relieved and the disc C¹ is slightly revolved backwards by the load upon V, the
undulations or inclined planes no longer coincide, and the discs C and C' are thereby
forced apart, and press upon the inner surfaces of the box B and lid A, thus
imposing sufficient resistance to sustain the load. The relative positions of the
undulations or inclined planes upon the surfaces of C and (with the projections b
upon the said discs, are such that free motion can only be obtained when
the wheel E is operated.
Although I have shewn and described my invention as applied to an ordinary hoist,
I may apply it in a similar manner to other hoisting, elevating or lifting apparatuses
for the same purpose as herein referred to.
I may also
arrange the discs so that the inclined or angular parts are upon the
periphery instead of upon the face of each disc as described.
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 ;-
First. In a lift, hoist, pulley block, crab winch, crane or like lifting apparatus
the employment of two discs c c¹ with undulating surfaces, in combination with a
box B, sleeve D and clutch jaws a a¹ substantially as described and shewn and for
the purpose specified.
Second. The construction and arrangement of discs CC, groove balls b
sleeve D, clutch jaws a a¹ and projections 61, substantially as herein described
and shewn by the appended drawings.
Dated this 1st day of July 1891.
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicant.