Year: 1887

page_text: We SAMUEL NEWTON and THOMAS NEWTON both of Barker Street Strangeways
Manchester in the County of Lancaster Mechanical Engineers 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 :-
Our improvements have reference to apparatus for preventing the cage of Hoists
from falling when the rope or chain breaks by which the cage is raised or lowered.
They consist in the application at the top of the cage of two or more levers having a
stud or pin through them, the pin working in a slot in a bracket fixed to the top of
the cage, one end of the lever is attached by a small chain or band to the chain or
rope which operates the cage, the other end of the lever is made to fit the groove in
the guide or guides in the well of the hoist and in which the cage works.
This lever has an incline on it which rests on a pin in the bracket, when the lover
is free of the guides, the incline on the lever is resting on the pin in the bracket at
the top end of the incline, but on the breaking of the cage chain or rope, the end of
the lever connected with the cage chain or rope falls by its own weight or by the
assistance of a weight or spring attached to it, in falling the pin in the bracket acts
on the incline of the lever, and causes the lever to slide forward in the slot of the
bracket towards the cage guide and presses against it, the action of the
cage itself
now makes the lever to move until it is completely bound betwixt the cage guide and
the pin in the bracket, and thus prevents the cage from falling.
In the accompanying sheet of drawings
Fig. 1 is a plan of the top of a cage with four of our levers arranged to act in the
angle corners of the four guides in which the cage slides, and free of the guides.
Fig. 2 is an elevation of the top part of a cage and its guides accross the line xx
in fig. 1, shewing the long end of the levers connected to the cage chain, when the
cage is in working order, and as shewn at fig. 1.
Fig. 3 is a plan of the lever and bracket-drawn to a three inch scale-and
shewing the lever in its position when free of the guides.
Fig. 4 represents the same, but in the position when the cage chain or rope is
broken, and with the lever bound betwixt the groove in the cage guide and the pin in
the bracket.

page_text: Fig. 5 is a plan of the lever and bracket.
The same letters refer to similar parts as shewn in the different figures.
a is guides or ways in which the cage slides, b the cage, c the cross beams of the
top of the cage, on which the bracket and levers are fixed, d the chain or rope which
carries the cage, e the brackets fixed on the cross beams of the cage, the levers,
the pin in the lever which works in the slot h of the brackets, i the inclines on the
levers, the pin in the bracket and which is acted upon by the incline i of the levers.
ka weight on the long end of the levers the small chains or bands for connecting
the levers with the cage chain or rope, m the end of the levers f shaped to fit, the
grooves in the guides a, this end of the levers we make if necessary corrugated so
as to take firmer hold in the grooves n of the guides.
The levers may be made flat instead of angular at the corrugated end, so as to act
against flat guides for the cage, when such are used.
Having now particularly described and ascertained the nature of our said Invention
and in what manner the same is to be performed, we declare that what we claim is :-
The use of a lever with an incline on it working in a slot in a fixed bracket, (or
their mechanical equivalents) the incline on the lever being actuated by a pin (or its
equivalent) in the bracket, so that when one end of the lever falls owing to the
breaking of the cage chain or rope, the incline on the lever acting on the pin in the
bracket presses forward the lever against the cage guides, for the purpose of preventing
the cage from falling, as described and set forth in the drawings.
Dated this 50th d. of m. 1007
PETER MCGREGOR,
5, John Dalton Street, Manchester,
Agent for Applicants.