IMPROVEMENTS IN APPLIANCES FOR AUTOMATICALLY SHUTTING AND OPENING THE EGRESS FROM AND ACCESS TO HOIST WELLS to be as follows:
Year: 1884

page_text: PROVISIONAL SPECIFICATION,
I JOHN STONES of Ulverston in the County of Lancaster, Revolving Shutter
Maker do hereby declare the nature of said invention for "IMPROVEMENTS IN
APPLIANCES FOR AUTOMATICALLY SHUTTING AND OPENING THE EGRESS FROM AND
ACCESS TO HOIST WELLS to be as follows:-
"
The object of this invention is to prevent accidents.in cage hoists or lifts by
means of automatic appliances operated by or from the cage itself so that a door
or doors arranged in the side or sides of the hoist well and which admits of egress
from the cage and entry into the cage kept closed at all times except when the
cage is opposite the floor or landing stage. The door is balanced and may be in
one piece or in two pieces balancing each other and may be an ordinary sliding
door or doors or may coil on and off a shaft like an ordinary revolving shutter.
On the top or upper part of the cage I provide a projecting pin or peg which
as the cage ascends comes in contact with a tumbler or catch for locking the door
or the two halves. As the cage rises still further the aforesaid projecting peg
comes in contact with a bolt on the top half of the door and carries it with it, the
bottom half of the door at the same time descending thus allowing persons to leave
or enter the cage through the opened doors when the cage is in the proper height
relatively to the landing. As the top half of door rises the opposite end of its
bolt at last comes in contact with a catch plate fixed in some part of the hoist well
and the bolt is thereby drawn back to clear itself of the peg on cage. The cage
is now fairly in front of the opened door and the door will now remain open
until the cage either has gone a short way further up or descends again. In
the former case a projecting pin or peg on the bottom or lower part of cage comes
in contact with a bolt on the bottom half of door thus dragging the latter up
with it, whereby the top half of the door simultaneously drops. When the doors
have thus arrived to the former position, closing the well opening the bolt on
the bottom half of door will come in contact with a catch plate fixed in some part
of the hoist well whereby the bolt is drawn back and thereby sets free the
projecting peg on the cage.

page_text: If the cage be required to descend a projecting pin on the bottom of the cage
will push aside the aforesaid tumbler clear of its locking pin and another peg
will act on a bolt on the bottom half of door which has been put in position by
means of a spring or weight so as to make the cage carry the same down with it
(the upper half door ascending at the same time) and when the cage is fairly in 5
front of the well opening the last named bolt which has been kept in position by
a spring or weight will have been drawn back by a catch plate and have set free
the aforesaid peg which acted on it.
Or the arrangement may obviously be reversed that is to say, the catches or bolts
may be fixed on the top and bottom of the cage instead of on the door, and the 1
projections to meet the catches on the doors of weights instead of on the cage.
1004

page_text: I, JOHN STONES of Ulverston in the County of Lancaster Revolving Shutter
Maker do hereby declare the nature of said Invention for "IMPROVEMENTS IN
APPLIANCES FOR AUTOMATICALLY SHUTTING AND OPENING THE EGRESS FROM AND
"
ACCESS TO HOIST WELLS 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 in cage hoists or lifts by
means of automatic appliances operated by or from the cage itself so that a door
or doors arranged in the side or sides of the hoist well and which admits of egress
from the cage and entry into the cage is kept closed at all times except when the
cage is opposite the floor or landing stage. The door is balanced and may be
in one pieco or in two pieces balancing each other and may be an ordinary
sliding door or doors or may coil on and off a shaft like an ordinary revolving
shutter.
Figure 1 is a vertical part sectional elevation showing the opening leading into
hoist way or hoist well closed by two half doors T and T' one half balancing the
other, so that while the one is ascending the other is descending. Figure 2 is plan
section. A plate with a projection A¹ is fixed to the top A of cage, and as the
cage ascends this projection pushes aside the catch tumbler or lock B which secures
the two half doors together on the inside thus preventing any one from opening
the doors from the outside. As the cage ascends further, the projection A³ comes in
contact with the bolt or lever C which is secured near the bottom on the upper
half T of door, and carries the door T up until the bolt C comes into the dotted
position when it is released by the sido catch D which is secured to hoist frame.
As the upper portion T of door thus ascends the lower portion T¹ descends until
the bolt E comes into the dotted position shown when it gets into the catch D'
which is secured to hoist frame and allows the pin or projection F fixed to bottom
of cage to pass the first bolt E and catch the second or higher bolt E' and thereby
lift the bottom door T' until the bolt E' is released by the side catch D³. The
doors are now closed and the cage travels upwards to the next floor. As the cage
descends the projection F fixed on plate to bottom of cage opens the lock B, and
afterwards the pin F takes hold of the bolt E and brings down the bottom half
door T¹ until the bolt E is released by the side catch D' when the door is open and
the cage is in front of the door opening As the cage descends, the projection A¹
on top of cage takes hold of bolt C¹ in the upper dotted position on the left and
brings the upper door T down until the bolt is released by catch D³ thereby
closing the opening. G is a handle on outside of door and connected to lever E on
bottom door and lever Con top door to draw them out of action to enable cage to
pass when required without opening the doors. Figure 2 is a full size plan
section and Figure 2b a front view of this handle which is provided with a knob G¹
the stem of which can slide in a sector slot in the plate fastened to the door.
The spindle G³ has an inner lever G which works against a peg Gs on the bolt or
lever E. The sector slot in the plate G³ has a radial prolongation at one end

page_text: for the stem of the knob to slide into for securing the bolt in the withdrawn
position.
Figure 3 is a vertical part sectional elevation of hoist well and cage showing
another arrangement for working the doors. Figure 4 is a plan section. A is the
cage with spring bolts B and B fixed at top and bottom. C is a plate shown in 5
dotted lines fixed to bottom of door T (which latter is not shown in Figure 3) and
having two projections C¹ and C. D is a wedge shapod projection fixed to side of
hoist frame. As the cage A ascends the projection D forces back the spring bolt B¹
to clear the lower projection C on door. After the extreme point on sido projec-
tion D has been passed, the bolt springs back in time to catch the top projection C¹ 1
on plate as shown on Figure 3 and carries the door up to the required height
when it comes in contact with another side projection D' fixed to the side of huist
frame and is thereby released. The door is balanced by a weight E working in
grooved slides to keep it in required position and the said weight has two
projections E and E' similar to the projections C¹ C on bottom of door. When 1
the door is at its required height for being open, the bottom projection E³ on
weight E will have descended to opposite the extreme point of the wedge-shaped
projection D and thus allowing the spring bolt B on bottom of cage to pass the
lowest projection E² on weight and catch the highest projection E'; and the
weight E is lifted as the cage ascends until the door is closed and the spring bolt 2
released by the projection D³. The same action takes place in cage coming down
as in going up, only vice versa. Instead of the one bolt B and the two projec-
tions E' and E' on the weight and instead of the bolt B' and the two projections C³ C³
on the door I may vice versa use two bolts and one projection in each case.
Figure 5 is an end elevation and Figure 6 a plan section of the same arrange- 2
ment applied to Revolving Shutters. H is a toothed wheel keyed on to shutter
shaft I. T is the shutter coiled thereon. K is an endless chain constructed to
work in the teeth of the wheel H and passing over an upper and a lower pulley L
Attached to chain K is a weight E (to balance the shutter) with two projections E¹
and E² for the spring bolts B on the cage A (shown dotted in Figure 6) to operate 3
upon as previously described. For lifting the shutter Ta projection plate is fixed
to the bottom of shutter samo as the plate C on bottom of door in Figure 4. D is
a projection fixed to the side of the wall for the spring bolt B to work against as
in the previous example.
Figure 7 is a side view and Figure 8 a plan of a bolt A to fasten the door F of 3
of the hoist well on the inside. One such bolt A is secured to top of door and
another at bottom. On the said bolt A is a toothed rack which is operated upon
by toothed wheel B. To this wheel is fixed a cam C which is operated upon by
projection pin D. This pin which is on top of cage G is shown above the cam,
having passed up and drawn the bolt back out of the side of hoist well frame E 4
thus setting it at liberty for the spring bolt described with reference to previous
figures to lift the door. On the other side at top of door is fixed another bolt and
when the cage travels upwards the pin D on the bottom of cage acts on the cam C
and shoots the bolt A into sido of frame E. As the cage comes down it acts again
on the cam C and opens the bolt A. As the cage travels further. down the top 4
pin D again acts on cam C of bottom bolt A and closes it.
From the foregoing it will be understood that accidents from persons falling down
hoist well holes may by this invention be prevented while no attention is required
on the part of an attendant. If on any one floor the door or shutter is not to
open the working parts can easily be made to be thrown out of gear by means 5
of the lever G Figure 4. The arrangements described are applicable to existing
hoists.
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
I claim is
First The employment in cage hoists of automatic safety appliances for
opening and closing hoist well doors or shutters such automatic appliances being
5

page_text: operated by or from the top and bottom of the cage itself in such manner that
such door or doors shall be kept closed at all times except when the cage is opposite
the floor or landing stage substantially as set forth.
Second-The construction of automatic hoist well door shutting and opening
appliances described with reference to Figures 1 and 2.
Third-The construction of automatic hoist well door shutting and opening
appliances described with reference to Figures 3 and 4.
Fourth-The construction of automatic hoist well shutter shutting and opening
appliances described with reference to Figures 5 and 6.
Fifth The construction of automatic appliance for locking the hoist well door
on the inside described with reference to Figures 7 and 8.
1000