Safety Appliances for Hoists and Lifts.
Year: 1894

page_text: Date of Application, 17th Sept., 1894
Complete Specification Left, 17th June, 1895-Accepted, 20th July, 1895
PROVISIONAL SPECIFICATION.
Safety Appliances for Hoists and Lifts.
SAMUEL GREEN BENNETT, The Limes, Windmill Lane, Smethwick, in the
County of Stafford, Engineer do hereby declare the nature of this invention to be
as follows:-
The object of this invention is to prevent accidents when the cages of hoists or
lifts are descending. Numerous accidents have arisen owing to persons protruding
their bodies into the well hole of the hoist, the descending cage of which has
jammed them between the cage and the frame. This invention prevents such
accidents, since it provides a safety gear which precedes the cage, and the safety
gear coming into contact with any obstacle or projecting body automatically stops
the cage.
This invention is carried into effect by means of the safety steps, strikers and
In
general gear described in the Patent No. 13111 of 1887 and granted to ine.
addition to the cage being fitted with the gear therein described, there is also fitted
to the bottom of the cage an iron or wood framing preferably hinged, or other-
wise fixed to the back or other part of the cage. To this framing suitable
webbing of any material is laced by cords or any other method of fixing, or if
preferred the framing may be filled in with wood or any other solid material,
although the webbing is more suitable and less liable to cause injury in case
of an accident. The framing is not allowed to fall beyond an arranged maximum
distance from the cage at the front by any convenient means, such as straps,
stops &c., but being hinged at the back it is obvious it can be freely moved
upwards towards the bottom of the cage. The framing is so placed that when by
any cause it is moved upwards it comes into contact with a projecting piece fixed
to the frame M Fig. 4 described in the Patent above referred to (No. 13111 of
1887) upon which the strikers are fixed. The effect of this contact would be to
raise the frame M when the strikers L and rollers O would also be raised and
therefore would be too late to engage the horns H, which would prevent the
steps F being actuated. On the nearest of these steps the cage would therefore
immediately rest.
Care would of course be exercised in designing the safety gear framing that in
all cases the cage would be stopped before the framing would come into contact
with the bottom of the cage. It is obvious therefore that if a man's head came
into contact with the said framing he would escape injury, since the cage would be
automatically stopped before he could be struck by the bottom of the cage, whereas,
without such safety framing it is obvious most serious injuries would in all
probability result from such an accident.
A
15th day of Santambor 1894

page_text: Safety Appliances for Hoists and Lifts.
"
SAMUEL GREEN BENNETT formerly of "The Limes" Windmill Lane
Smethwick in the County of Stafford and now residing at "St. Leonards
Selborne Road Handsworth also in the same county, 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 :-
The object of this invention is to prevent accidents when the cages of hoists or
lifts are descending. Numerous accidents have arisen owing to persons protruding
their bodies into the well hole of the hoist, the descending cage of which has
jammed them between the frame and the cage. This invention prevents such
accidents since it provides a safety gear which precedes the cage, and this safety
gear coming into contact with any obstacle or projecting body automatically stops
the cage.
This invention is carried into effect by means of the safety steps and strikers
and general gear described in the Patent No. 13111 of 1887 granted to me. In
addition to the cage 'being fitted with the gear therein described, there is also
fitted to the bottom of the cage an iron or wood framing preferably hinged, or
otherwise fixed, to the 'back or other part of the cage. To this framing suitable
webbing of any material is laced, by cords or any other method of fixing, or if
préferred the framing may be filled in with wood or any other solid material,
although the webbing is more suitable and less liable to cause injury in case of an
accident. The framing is not allowed to fall beyond an arranged maximum distance
from 'the cage at the front, by any convenient means, such as straps, stops, &c.;
but being 'binged at the back it is obvious it can be freely moved upwards towards
the bottom of the cage.
The details of the invention are illustrated in the accompanying drawings Fig. 1
being a back elevation of the cage and Fig. 2. being a side elevation. The framing
(as described in the foregoing description) is shown at A being hinged at the back
at B and fitted with webbing at C. although the hinged arrangement allows it to
move freely upwards, it is prevented from travelling too far downwards by passing
through slots or forks D in the connecting rods G attached to the frames M, these
frames being placed on each side of the cage. The action is as follows-When the
framing A comes into contact with any obstacle it is moved upwards. This motion
is immediately communicated to the connecting rods G attached to the frames M
and raises the strikers L. The motion of the strikers withdraws the rollers O as
indicated in Fig. 2. As this prevents the rollers actuating the horns H it is
obvious the steps F remain in their normal position. As the cage continues to
descend it immediately rests upon the nearest step, as shown at E Fig. 2. where it
will be seen the cage is about to rest upon the step indicated. However quickly
the cage may be travelling if a man's head or body should come into contact
with the framing A the cage will be automatically stopped before any injury can
be inflicted.
In some cases I supersede the connecting rods G and 'by jointing the framing A
by means of suitable joints or projecting pieces to the frame M lift the whole
including the strikers L.and the rollers O. The effect of this upward motion
would be to prevent the rollers O actuating the steps F since they would be too
late to do so before the cage rests upon the projecting step.
It is obvious that the framing A need not be jointed at the back, as shown, since
it may be attached or hung from the bottom of the connecting rods G or the
frames M or it may be suspended from the corners of the cage in any con-
venient manner, but of course so fixed that any motion will be at once communicated

page_text: to the connecting rods G or to the frame M. It may be also much smaller
than shown in drawing, and of any convenient shape, with or without webbing 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 :-
:-
1. The employment of a safety framing A at the bottom of cage for the
purposes above described, or any modification thereof embodying the principle of
the invention.
2. The employment of the connecting rods G and the frames M in conjunction
with the safety framing A for the purposes above described, or any modification
thereof embodying the principle of the invention.
Dated this 15th day of June 1895.
SAMUEL GREEN BENNETT.