Improvements in Automatic Hatch Operating Mechanism for Lifts.
Year: 1890

page_text: Date of Application, 25th Mar., 1890
Complete Specification Left, 23rd June 1890-Accented, 2nd Aug.. 1890
PROVISIONAL SPECIFICATION.
Improvements in Automatic Hatch Operating Mechanism for Lifts.
I, JOHN STONEHAM, of 58 Clinton Place, New York, County and State of
New York, United States of America, Gentleman, do hereby declare the nature of
this invention for IMPROVEMENTS IN AUTOMATIC HATCH OPERATING MECHANISM to be
as follows:-
This invention relates to an improvement in hatchways and has for its object to
cause an automatic opening of the hatches by the cage as the latter ascends or
descends and an automatic closing of the hatches after the cage has passed them.
Within the upright of the hatchway there is formed a groove which slants outwardly
from top to bottom. Within this groove a vertically movable stop is placed connected
by a chain that passes over suitable pulleys, to the forward end of the hatch. When
the
cage is rising it pushes the hatch up and passes the stop which is then at its
lowermost position. After the cage has passed the stop the hatch will gradually close
by its own weight and in closing will cause the stop to move upwards closely following
the bottom of the cage.
When the stop is in its uppermost position it will project
beneath the cage to its maximum extent.
On the descent of the cage it bears upon the stop and crowds it downwards and
outwards. This causes the hatch to gradually open and the cage is thus enabled to
pass both the stop and the hatch. When the cage has arrived beneath the hatch the
latter closes by its own weight..
Dated this 25th day of March 1890.
HERBERT J. ALLISON,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Automatic Hatch Operating Mechanism for Lifts.
I, JOHN STONEHAM, of 58 Clinton Place, New York, County and State of
New York, United States of America, Gentleman, 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:-
:-
This invention relates to an improvement in hatchways, and has for its object to
cause an automatic opening of the hatches by the cage, as the latter ascends or
descends, and an automatic closing of the hatches after the cage bas passed them.
The invention consists in the various features of improvement more fully pointed
out in the claim.
In the accompanying drawing:
Fig. 1 is a sectional elevation of a hatchway provided with my improvement.
Fig. 2 is a horizontal section on line a, x, fig. 1.
The letter a, represents a suitable frame for the hatchway, preferably having
platforms, to which the hatch or hatches b, are pivoted as usual. c, is the balanced
cage, adapted to be raised and lowered either by hand or by steam power.
Between a pair of the platforms of the hatchway there is secured a grooved
guidoway e, in which slides a stop f. This stop is connected by rope g, passing over
pulleys h, h', to the forward end of hatch 6, such forward end being preferably
weighted. The lower portion of the guideway e, need not be grooved and is provided
with an offset e¹, beneath which the hatch b, is received when raised, so as to clear the
cage. The groove of the guideway e is T-shaped in cross section (fig. 2) and the
cross groove, is placed at an inclination to the line of travel of the cage. That is to
Bay, while at the uppermost part of guideway e, the cross groove is at its closest

page_text: proximity to the cage, it gradually recedes therefrom towards the lower end of the
guideway. Within the cross groove e², there is received a flange f¹, of stop f, so that
said stop is also guided not in a vertical line, but at an inclination. The inclination
of cross groove e, should be such that while the stop, is entirely concealed between
the checks of the guideway when in its lowermost position it projects to its maximum
extent out of such guideway when in its uppermost position.
The operation of the device will be readily understood.
If the cage is below the hatch b, and is drawn up, it will push the hatch up beneath
shoulder thereby lowering stop. The cage will pass the -hatch and come into
contact with the stop, (now in its lowermost or concealed position) and will hold
such stop in, until it has entirely passed it. As soon as the cage has passed the stop,
however, the weighted hatch which had previously been placed in an inclined position
(full lines fig. 1) will by its tendency to drop down, pull the rope g. Thus as the cage
gradually rises, the pull on the rope will cause the stop, to rise directly below it,
the stop pressing against the bottom of the cage. But while the stop rises, it will
more and more project out of the grooved guideway, until when it is in its uppermost
position, it will be exposed to its maximum extent (dotted lines fig. 1) while the
hatch will have gradually closed.
On the descent of the cage, it will bear upon the stop and push it down, to gradually
open the hatch. When the stop has arrived at its lowermost position, it will be
entirely concealed within the grooved guideway, so as to be out of the way of the
cage. The latter now passes the stop and then passes through the open hatch. As
soon as it has cleared the hatch, the latter closes by its own weight.
The cage may be provided with a bevelled finger c', to push the hatch aside during
the descent of the cage.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
claim is :
1. The combination of a hatchway with a guideway e, a stop received by said
guideway and guided in an inclined direction, a hatch connected to the stop and a
cago, substantially as specified.
2. The combination of a hatchway with a grooved guideway e, having inclined
cross groove e², a stop f, having flange f¹, engaging said groove, a hatch connected
to the stop and a cage, substantially as specified.
2
3. The combination of a hatchway with a grooved guideway e, having shoulder e¹,
and inclined cross groove e², a stopf, having flange, engaging said groove, a pair
of pulleys h, ', a rope passing over said pulleys, a hatch connected by the rope to the
stop and a cage having a bevelled finger, substantially as specified..
Dated this 23rd day of June 1890.
HERBERT J. ALLISON,
Agent for the Applicant.