Improvements in Friction Hoisting (or Lifting) Apparatus.
Year: 1888

page_text: Date of Application, 1st June, 1888-Accepted, 1st July, 1889
COMPLETE SPECIFICATION.
Improvements in Friction Hoisting (or Lifting) Apparatus.
I, RENVILLE ANSELL, of Albert Wharf, East, Croydon, in the County of Surrey,
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 :-
-
These improvements relate to the construction of the mechanism for raising and
lowering the cages of lifts or other weights, and consist of a large drum, which is
keyed upon the winding shaft carrying the chain wheel by means of which the cage is
raised or lowered.
This winding shaft rotates eccentrically within an eccentric strap and is slightly
displaced to and fro by an eccentric ring actuated by a weighted lever attached to
the said ring, or cast therowith, a similar to and fro motion being thus imparted to
the drum. Within the hollow part of this drum is arranged another and smaller
drum koyod upon the driving shaft which imparts the power required for working
the lift and carries a motor pulley at its outer extremity.
Close against the large drum and outside thereof there is a break, fixed to the frame
carrying the mechanism and serving to hold and retain the cage or weights in any
suitable position.
And in order that my invention may be more fully understood, I shall now proceed
to describe the same, with reference to the accompanying drawings, in which Fig. 1
is a sectional elevation and Fig. 2 a sectional plan of my improved lift, like letters of
reference indicating corresponding parts. K. is an overhead frame composed of two
longitudinal wooden beams joined by cross iron brackets k¹, k², k bolted thereto.
Upon the brackets k¹ and ³, is mounted in suitable bearings, the driving shaft G
carrying the motor pulley M at its outer extremity and the small internal drum F at
its inner end.
The latter operates by friction upon the inner side of the large drum A keyed upon
the winding shaft B which is carried in suitable bearings by the brackets and k³.
The latter shaft carries also the chain wheel Cupon which is wound the chain c
attached to the cage or platform I and actuating the saune.
In close proximity to one side of the drum A is mounted on the beam K and
securely bolted thereto a break H which serves when the said drum is pushed tight
against it to stop the cage in any suitable position.
The shaft B rotates in a collar carried by a block D moving within an eccentric
ring & which turns within an eccentric strap or frame J conveniently fixed to the
cross bracket 2. Continuous with the block D or fixed thereto is a crank lever L
pivoting at o upon a pin fixed to a strap extending downwardly from the bracket
and shewn in dotted lines in Fig. 1.
This crank lever L-extends some distance out and carries a counterweight Wat
its outer end, which is likewise provided with a perforated projection or tab r. One
end of a cord g is attached to this tab and its other end passes around a pulley whose
frame is fixed to the ceiling and drops down within easy reach of the attendants
hand, being furnished with a ring by means of which it can be easily grasped.
When the motor pulley M is set in motion, the internal drum F rotates-and imparts
by friction against the inner side of the drum A, a similar motion thereto, which
causes at the same time the chain wheel C to turn and wind the chain up, consequently
raising the cage or platform I. When the latter has reached a suitable height, the
end of the cord g is pulled and the outer end of the lever L being raised, displaces
the shaft B to the left hand side and causes the drum to be wedged against the
break H and hence arrests its motion and that of the chain wheel C, the cage coming
to a standstill, and the internal drum turning loose.

page_text: On releasing the cord
the lever solicited by its counterweight W drops down
again and the drum A rèvolves again.
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 :-
The improved mechanism for operating lifts, hoists or the like, arranged, combined
and operating, substantially as and for the purpose described.
Dated this 1st day of June 1888.
HUGHES & SON,
5, Chancery Lane, London, W.C., Agents for the Applicant.