Closing Doors in Connection with Hoists.
Year: 1886

page_text: Date of Application, 14th May, 1886.
Complete Left, 7th Dec.. 1886.
Complete Accepted, 7th Jan., 1887.
1mрrоvещения 111 CHC
au
Apparatus 10
244
Closing Doors in Connection with Hoists.
I, JOHN BARRETT, of Eastburn Foundry, Eastburn near Cross Hills, in the County
of York, Millwright, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to construct apparatus by which the hoist doors on
the various floors communicating with the hoist well may be opened and closed
automatically as the cage is ascending or descending in the said well, which I
accomplish in the following manner :
My apparatus for operating the doors may be fixed either at the top of the well or
to the hoist cage, and consists in combining with a series of pinions, two toothed
racks, the teeth of which gear with the teeth of the aforesaid pinions. I make the
doors in two parts, as specified in my patent No. 5677 of A.D. 1881, and connect
them together by cords or chains which pass over grooved pullies, the top door on
each floor being connected by a cord or chain to a barrel attached to the respective
pinion.
The racks at the top of the hoist well may be straight or curved and are operated
by a pinion secured on the main or lifting barrel shaft which moves them one way or
the other according to the direction in which the cage is travelling. Each pinion and
barrel are connected by a cord or chain to the respective doors, and by mounting the
pinions between the racks, the barrels are turned, first in one direction and then in
the other, thereby opening and closing the doors connected therewith, while the racks
continue to move in the same direction.
When the racks are mounted to the cage, I secure a pinion and barrel to the side of
the hoist well opposite to each door opening, and attach the barrel, to the top part of
its respective door, by a cord or chain as before described. The teeth in all the racks,
both at the top of the well and on the cage, are so arranged that immediately the
doors of the opening to which the cage is opposite have been moved to the full extent,
the teeth on the opposite rack come into gear with the pinion thereby causing it to
revolve in the opposite direction and thus close the doors.

page_text: The racks on the cage inay be so arranged that they can be moved clear of the
pinions or brought into position so as to gear therewith when the cage is approaching
an opening, and thus to let the doors remain closed or be opened as desired by the
attendant in the cage, which is effected by mounting the racks at the top and bottom
upon quick pitched screws and connecting them together by a shaft and wheels, which
when operated with a lever by the attendant moves the racks into such position that
they are clear of or in position to gear with the pinions.
My object may also be accomplished by dispensing with the racks and pinions and
using in lieu thereof, plates and pullies mounted in the same manner, so that instead
of the barrels being turned with toothed gear, they are turned by the frictional contact
of the pulleys and plates, thereby opening and closing the doors as the cage travels up
or down the hoist well.

page_text: Closing Doors in Connection with Hoists.
I, JOHN BARRETT, of Eastburn Foundry, Eastburn, near Crosshills, in the County
of York, Millwright, 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 construct apparatus by which the hoist doors on
the various floors communicating with the hoist well, may be opened and closed
automatically as the cage is ascending or descending the said well; and consists in
applying two racks at the top of the hoist well or to the hoist cage and combining
with them pinions at, or communicating with, each floor, except the top and bottom;
also in making the doors in two parts as described in my specification No. 5677 A.D.
1881, connecting them together by cords or chains passing over pullies, and operating
the said doors as the cage is approaching and leaving a floor, by a cord or chain
connected to a barrel secured to the pinion at, or in connection with, the said floor.
In order that my invention may be better understood I will describe the same more
in detail by making reference to the accompanying drawings, in which Fig. 1
represents a sectional elevation through a hoist cage with my improved apparatus
added thereto, Fig. 2 a view shewing the means I employ for operating the hoist doors
by a straight rack secured at the top of the hoist well, and Fig. 3 an elevation shewing
the arrangement for operating the doors by curved segment racks.
When the racks A A' are attached to the cage B, I secure a stud to the side of the
hoist well opposite to each pair of doors, and on the said stud 1 mount a pinion C and
barrel, and attach to the latter and the top portion D of the door a cord or chain E so
that when the pinion C is operated in the manner as hereinafter described, the top and
bottom portions D and D of the door in connection with the said pinion, are opened
or closed.
The edges of the doors D and D¹ are grooved and work on the slides F secured at
cach side of the hoist; the top and bottom portions being connected at each side by
cords or chains G which pass over pullies G¹ mounted in brackets secured in suitable
the hoist well the rack A will come in
positions. When the hoist cage B is rising up cage is approaching thereby causing
gear with the pinion. C of the Hoor to which
the pinion, and barrel secured thereto to rotate, thus winding around the circumference
of the latter the cord or chain E, by which the top portion of the door D is raised, the
cords or chains G allowing the bottom portion D' to descend at the same rate, so that
by the time the cage is opposite the floor, the doorway is fully open.
If the cage is then allowed to descend, the pinion C will revolve in the opposite
direction, or if it continues its ascent, it will gear with the rack A¹ and by it be turned
in the opposite direction, thereby allowing the two portions D and D' of the door to
close.
The racks A and A' on the cage may be so arranged that they can be moved clear
of the pinions C or brought into such position so as to gear therewith in the manne
as before described when the cage is approaching a floor or opening; this I accomplish

page_text: in the following manner: The racks A and A¹ are mounted at the top and bottom
thereof on quick pitched screws H, upon each of which is secured a bevel wheel.J
which gear with the bevel wheel J₁ secured on the upright shaft K, to which is
attached a lever K' for operating the same. When the attendant in the cage desires
to pass a floor without opening the doors, the lever K' is operated to move the racks
away from the pinion so that the same allows them to pass without coming in contact
therewith, as shewn by Fig. 1; but when the doors of a room are required to be
opened, the lever K' is operated to bring the racks towards each other such a distance,
that on passing the pinion they will gear with the teeth thereof and thus operate the
before mentioned barrel and doors D and D¹: the movement of the lever K' being
limited by the same, or the racks A and A¹ coming in contact with stops so that they
cannot be moved to such an extent that they are too deep in gear.
The hoist doors D and D₁ may be operated by a straight rack fixed at the top of the
hoist well, and which may be operated by a pinion L secured on the barrel shaft as
shewn by Fig. 2, or on any other convenient shaft. The pinion L is geared with the
teeth on the underside of the rack slide M, and on the said rack slide are the teeth N
and N, which, as it is moved by the pinion L in its bearing O, the teeth N come in
gear,
as it advances with the pinions P, P1, P2, and P3 or as many more pinions as
there are pairs of doors to operate; thereby operating the pinions and the respective
pullies Qattached thereto in one direction, and the teeth N on the top side of the rack
slide in the opposite direction.
Each of these pullies is grooved, and secured to cach is a cord or chain E, which
passes over a small guide pulley R, and finally secured to a top door D, each pulley Q
and cord E being connected to its respective door D, which is constructed and
connected to the bottom one in the manner as before described. On the hoist cage
being put in motion for rising, the bottom teeth N operate the respective pinions as
tacy come in gear therewith and the pullies connected thereto, by which the doors
connected with the pinion and pulley thus operated, are raised and thereby opened:
the bottom portions D' lowering at the same time, and on the top teeth N gearing
with the said pinions, the doors are closed by the pullies revolving in the opposite
direction.
The hoist-doors may be operated as shown by Fig. 3 by the wheel S, which is
actuated by a pinion L. On the wheel S are formed or secured the short segment
racks N and N, the former as the cage is rising, operating alternately the pinions
P, P1, P2 and P3 or any other number, and the grooved pullies Q attached thereto in
one direction, thus opening the doors; the other segment racks N¹ operating the
pullies Qin the opposite direction, by which the doors are closed; the said pullies
being attached to the respective doors by the cords or chains E, in the inanner as
before described.
My object may be accomplished by dispensing with the toothed racks and pinions,
and substituting therefor, plates without teeth and pullies mounted in the same manner
as the racks and pinions before described. Figs. 4 and 5 represent in section portions
of a hoist cage which is fitted with plates A and A¹ mounted on quick pitched screws H
in the same manner as the racks in Fig. 1. Upon each screw is a spur wheel J,
which gears with its respective rack J secured to the rod K, the latter having a
handle attached thereto projecting in any convenient direction, by which the said
plates may be operated and brought in contact or clear of the pulley C, the circum-
ference of which and the face of the plates A and A' I prefer to cover with leather,
india-rubber, or other flexible material, in order to prevent slipping when a pulley
comes in contact with the face of a plate, by which it is turned by the frictional
contact between the plate and pulley, thereby opening and closing the door connected
therewith as the cage travels up and down the hoist.
The teeth N and N' on the straight racks in Fig. 2, and on the segment racks in
Fig. 3, may be dispensed with and the faces covered with leather or india-rubber,
which, on coming in contact with a similar covered pulley, the frictional contact will
rotate the pulley and open or close the respective doors as the cage passes through the
hoist.

page_text: Having now particularly described and ascertained the nature of my invention, and
in what manner the same is to be performed, I declare that what I claim is :-
A hoist cage fitted with racks A and A¹ combined with the pinion C for operating
the doors D and D' all arranged substantially in the manner as shewn and described.
The doors D and D' combined with the pinion C for the purpose described.
The racks A and A' combined with the screws H, shaft K and lever K¹ substantially
in the manner and for the purpose set forth.
The straight rack M combined with the pinions, grooved pullies Q, cords or
chains E, and doors D and D¹ constructed and operated substantially in the manner
as shewn and described and for the purpose set forth.
The combination of the wheel S and segment racks N and N¹ with the pinions,
grooved pullies Q, cords or chains E, and doors D and D', all arranged and operated
substantially in the manner shewn and described and for the purpose set forth.
The plates and friction pullies in lieu of the racks and pinions combined with the
doors D and D¹ arranged substantially in the manner shewn and described and for the
purpose set forth.
The doors D and D' combined with the friction pullies, in the manner and for
the purpose described.