Safety Appliance for the Raising and Lowering of Cages, Skips,. Lifts, Waggons, and such like, either Working Down-right, or on Inclines of Every Description.
Year: 1896

page_text: Date of Application, 29th May, 1896
Complete Specification Left, 27th Feb., 1897-Accepted, 22nd May, 1897
PROVISIONAL SPECIFICATION.
Safety Appliance for the Raising and Lowering of Cages, Skips,.
Lifts, Waggons, and such like, either Working Down-right, or
on Inclines of Every Description.
MARWOOD JOHN OLIVER Tremeer House St. Tudy R.S.O. Cornwall do hereby
declare the nature of this invention to be as follows:-
I place a beam or cross-piece over centre of cage, skip, waggon or lift. Runing
loosely through this beam, I have an upright, to which rope, or chain for raising, or
lowering is attached. Between the attachment and the beam, I place on the upright
a block, bevel'd, or with rollers at each end.
On the sides of cage, lift &c. I put arms, hinged to upper edge of the same,.
lower ends protruding over the sides, at a required distance, and the upper ends,
drawn together by springs, so as to rest against the abovenamed upright. When
rope or chain is attached, and weight comes on, the upright centre piece is drawn up,
and block with bevel'd ends or rollers pressing against the arms, opens them, pressing
lower ends nearer sides of cage, lift &c.
The instant rope or chain breaks, or is detached the centre piece drops, tops of
arm are drawn together by the springs, and lower ends protrude. On each side-
I place guides, with notched rails, consequently the moment arms protrude, the catch.
in said notched rails, and progress of cage, skip, lift or waggon is stopped. In places
where great speed is required, in ascending or descending to prevent concussion,.
I hang the notched rails or springs (if a long distance to be travelled at intervals) so.
that all danger from sudden stoppages is prevented.
Dated this 28th day of May 1896.
MARWOOD JOHN OLIVER.
Safety Appliance for the Raising and Lowering of Cages, Skips,
Lifts, Waggons, and such like, either Working Down-right, or
on Inclines of Every Description.
MARWOOD JOHN OLIVER St. Tudy R.S.O. Cornwall 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:-
To accomplish this, I place a beam or cross piece over centre of cage or lift &c.;
running loosely through the beam or cross piece I have an upright to which rope or
chain for raising or lowering is attached. Between the attachment & cross-piece I
On the sides of
place on the upright a block bevelled or with rollers on each end.
cage, skip &c. I put arms hinged to the upper edges of the same the lower ends
protruding to a required distance the upper ends being drawn together by springs
against the above named upright. When rope or chain is attached & weight comes

page_text: on, the upright centre piece is drawn up & the block with bevelled ends, or rollers
pressing against said arms open them, consequently pressing lower ends near side of
cage or lift etc. The instant rope or chain breaks or is detached the centre piece
drops, tops of arms are drawn together & lower ends protrude. On each side I
place guide with notched rails, consequently moment arms protrude they catch in said
Dotched rails, & progress of cage, lift, waggon &c. is stopped. In places where
great speed in ascending or descending is required I hang said notched rails on
springs, & if long distances to be travelled said springs to be placed at intervals
so that all danger from sudden steppages or concussion is prevented.
In order that my invention may be fully understood I will now refer to the annexed
drawings, in which :-
Figure 1. is a sectional side elevation of my invention.
Figure 2 plan view of same.
a is the cage to which the bars 6 are hinged at o & which bear upon
the upright bar de being a spring which tends to maintain the bars in
this position the dotted lines indicate the positions of the bars 6 & and the cage a
when suspended for travelling. f is a bar having the friction rollers i which
bear upon the bars b. This bar is secured to the upright d which has the stop
piece g for preventing same from passing through the cage further than the position
shewn by the dotted lines. It will be seen that in the ordinary working position of
the cage the ends h of the bars b will not engage in the indentations on the rack j
but in the event of the suspending rope or chain k breaking the action of the
springs e will cause the ends of the bars 6 to engage on the racks j thus preventing
the descent of the cage. These racks j are supported at intervals upon springs or
buffers for the purpose of preventing concussion in the event of the rope or chain k
breaking as this concussion bas been found to be objectionable. The racks j being
formed in the required number of sections.
Having now particularly described and ascertained the nature of my said inven-
tion, & in what manner the same is to be performed I declare that what I
claim is :-
1. Combined construction & arrangement of the various parts substantially as
described and shewn.
2. In safety devices for lifts of the class berein described two or more hinged
bars or levers carried by the cage operated by a bar carrying friction rollers said
bar being secured to a movable upright rod or bar to which the suspending chain
or rope is attached, said hinged bars being controlled by a spring or springs, the
ends of which engage, in the event of the chain breaking, in racks movably supported
on springs or buffers for the purpose of reducing concussion.
Dated this 27th day of February 1897.
E. EATON,
Agent for Applicant.