US254242A - sexton - Google Patents

Description

Sheets-Sheet 1.

(No Model.)

W. F. SEX'TON, sr. -& W. F. SEXTON, Jr.

' HOIST. V

Patented Feb. 28, 1882.

Q (No Model.) 7 3 Sheets-Sheet 2.

W. FfSEXTON', Sr. F. SEXTON', Jr.

HOIST.

No. 254,242. Patented Feb. 28,1882.

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(No Model.) 3 Sheets-Sheet 3. W. F. SEXTO'N, Sr. 86 W. F. SEXTON, Jr..

HOIST. No 254,242. Patented Feb. 28,1882.

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UNITED STATES:

PATENT OFFICE.

WILLIAM F. SEXTON, SR, AND WILLIAM F. SEXTON, JR.,-OF TORONTO ONTARIO, CANADA.

HOIST.

SPECIFICATION forming part of Letters Patent No. 254,242, dated February 28, 1882.

' Application filed April 25, 1881. (No model.)

To all whom "it may concern Be it known that we, WILLIAM FRANCIS SEXTON, Sn, and WILLIAM FRANCIS SEX'roN,

Jr., both of the city of Toronto, in the county cation.

The object of the invention is to provide antomatic machinery by which the doors of hoists 'or elevators are opened by the movement of the car or cage; and it consists essentially of an endless cord or band connected to the door, in combination with a lifting-pawl adjustably attached to the car or cage, and so arranged that it can be set to come in contact with a bracket preferably placed upon the doors of the hoist, substantially as hereinafter explained.

In the drawings, Figure 1. is a perspective view. of a hoist in which the lower doors are made to swing outwardly. The upper door is designed to open in two parts, one half ascending while the other half descends. .Fig. 2 is a similarview of a hoist in which the lower door slides sidewise and the upper door rises. Fig. 3 is a perspective view of a goods-hoist,

the lower door arranged to swing upwardly,

while the upper door is arranged to slide horizontally.

A are the standards or guides of .the hoist.

B is'a cage; G,the lower door in Fig. 1,hinged to'swing outwardly. D is theupper half and D the lower half of the upper door in this figure. Eis a lower door in Fig. 2, arranged to slide sidewise, and F is the upper door, arranged to slide vertically. G are hinged floor-doors in Fig, 3, and H the sliding floor-doors in the same figure.

As all the doors, no matter in what way they are arranged to open, are operated on the sameprinciple-via, by the application of an endless rope connected to them, and through which the desired motion is secured by the movement of thecage-it is therefore well, before explaining in'detail the operation of the doors illustrated, toexplain briefly the principle upon which they are operated. With that view we show in Fig. 4 a skeleton view of our endless operating-cord, the effective working of which may be explained in a few words.

thereof, as represented.

I and J represent respectively two sliding doors, the upper, I, being arranged to slide upwardly, while the lower, J, is caused to descend.

K is an endless rope or cord passing around four pulleys marked L. These pulleys are pivoted on the standards or other suitable point in the hoist, independent of the doors.

M is a bar connecting one side of the door I to the rope K, and M is a bar connecting the rope K to the door I through the medium ofa branch rope passing over the pulley L and connecting with the rope K on the opposite side, and the bar N and cord N similarly connect the door J to the same rope, K, on opposite sides In order, then, to operate these doors, it is only necessary to apply power to the endless rope K in such a manner as to cause it to travel. This may be effected by arranging a suitable'projection on the cage to come in contact with a bracket placed on the door I, or, as indicated in the drawings,=-.a catch or projection on the rope K. By thus moving the rope K' in the direction indicated by arrows the upper door, I, will be caused to ascend while the lower door, J, will be caused to descend, the doors and connections specified assuming the position shown in Fig. 5.

It will be well, as we are now referring to Figs. 4 and 5, to draw attention to the fact that owing to the connection between the endless rope K and doors I and J it will be possible, by making the upper door heavier than the lower door, J, to cause. it to counterbalance and lift the lower door when relieved from the cage; .or a counter-balance, N may be placed on one side of the rope K, being sufficiently heavy to counterbalance and raise the lower door, the upper one being closed by its own weight. It will further be noticed that the doors will rise evenly in their bearings, being connected on both sides to the endless rope K, which therefore exerts its power evenly. The effect of the movement of this endless rope will be the same when applied to any description of door, the connect-ion to it being altered to suit the manner in which each particular door is hung. For instance, in Fig.1 the lower door is shown to open outwardly, being caused to fly open by the action of a spring, 0, the

endless rope in this instance being arranged to close the door when-the cage B is caused to ascend, an arm, P, being placed upon this cage in such a position that it will come in contact with the catch Q, attached to the endless rope K. In this manner the rope is made to travel in the direction indicated by arrows and through the conneetionof the shortbranch cord M and Nflwhich pass from the endless rope and through the stationary brackets M 351 to the door 0, as indicated, and close the doors, when they are locked by a suitable catch, which it is not here necessary to describe. The arm P is so arranged that it will keep in contact with the catch Q, so long as it is necessary to close the door; but when the dooris closed the pressure of the arm P becomes so great that the catch will bend the rope and allow the arm P to spring past said catch, after which the arm P will not interfere with the rope K again till set by sliding it on the bar Z of the cage to come in contact withanother stop. The doors D and D in this same figure are connected to the rope K exactly in the same manner, as shown in Figs. 4; and 5. A projecting bracket, T, is attached to the upper door, D, and a lifting-bar, U, is suitably attached at a convenient point on one of the upper timbers of the cage. When the operator wishes to open the doors D and D he sets the lifting-bar U by sliding it on the bar Z of the cage, so that when the cage ascends it will come in contact with'the bracket T, lifting the door D, and through it imparting a movement to the endless rope K, which, being connected, as described, to the door D, causes the latter door to descend as the cage forces up the upper one.

We mayhere mention that in building a hoist thedoors on the different flats of thebuildin g will preferably be of the same kind-tl1at is to say, if the lower doors are of the kind indicated by G, then the upper doors of this particular hoist will be of a similar kind, and the arm P will be arranged to operate all the doors or on the other hand, if the doors slide vertically, then each door is provided with abracket, T, and the lifting-pawl U is so arranged that it may be set to operate any one of the doors desired.

As it is desirable that the water or other motor power should be closed oft" when the doors in any particular flat are opened, we provide a bracket, V, attached to the door D, through which the check-rope W passes, as indicated. Stops a a are placed upon this rope 'Win such a position that when they are opcarrying the lower stop, a, to a point parallel with the stop on the other side of the checkrope. By providing the door on each flat with a bracket for operating the check-rope, as described, the power, it will be seen, willbe closed ofi when the door is opened, as represented in this Fig. 2, and so long as the cage remainsin that position, with the door open, it is not possible for any one on a different flat to cause the elevator to move, and in this way accidents are avoided. When in thisposition, whenever it becomes necessary for the elevator to descend and the doors to close, the pawl U is moved from under the bracket T of the door, so as to enable thedoors to'be closed by moving the ropes K in the direction opposite to that indicated by the arrows in Fig. l and 2, and as soon as the bracketVhas moved slightly below the stops it a on the check-rope the check-rope can be operated for setting the operating machinery in motion. When the'elevator or cage is at its highest point, as shown in Fig. 2, there is no necessity for closing the upper door, although it could be closed, if desired, for any reason, as above described, by sliding the pawl U from under the bracket T of the door.

On reference to Fig. 3 the manner of applying the endless rope K for the purpose of operating the sliding and hinged hatchwaydoors is clearly shown, the main rope passing around pulleys L on opposite sides of the frame, and also aroundthe guidiug-pulleysL and connected to the doors by branch ropes k passing over pulleys k. In this case the lifting-pawl U is arranged to come in contact with the projecting arm X, attached to the endless rope K, as shown, which action causes theendless rope to travel, and owing to the manner in which it is connected to the doors they are caused either to fold or slide back, as the case may be.

In the drawings, in Figs. 1 and 2, we have shown a lifting-pawl provided with a square socket arranged to slide upon a cross-bar, Z. This may be done by hand, or, if found necessary, ratchet or other mechanism may be arranged for the purpose of adjusting it; or any other form of movable pawl or lifting-bar that ITS will answer the desired purpose may be used;

or a pawl may be pivoted to the cross-bar, so as to be adapted to turn to one side, as shown in Fig. 3.

In describing the action of the cage upon the lower doors, 0, for the purpose of closing them we mention that a lifting pawl or bar comes in contact with a bracket upon the endless rope K. Instead of this plan, one equally as good would be to place a counterbalance-weight upon the endless rope sufficiently heavy to overcome the tension of the opening springs. In this case the doors would be opened by the movement of the cage, the power required being only that which would be sufficient to overcome the counterbalance-weight, as the moment the weighted rope was raised the springs would throw the doors open. The lifting pawl or bar U should be so constructed that the one intended to open the door as the cage ascends should trip past the bracket when the cage is descending, and that pawl or bar made to open the door as the cage descends should be so constructed that it will trip past the bracket as the car ascends. Another important element consists in incasin g the hoist with boiler-plate, forming a perfectly fire-proof escape. The doors being always closed, the upward draft is prevented.

It may be well to mention here that as. each door is arranged to operate independently of all the other doors only one door will be open at a time, and that one opposite to the cage. It may further be stated that by setting the pawl to open a door in one of the upper flats the cage can be sent up empty, when it will automatically open the door for which it has been set, and owing to its connection with the checkrope the power will at the same time be shut off. In the case of hand-hoists which are operated by a brake the check-rope will be connected to and arranged to operate the brake instead of the power.

In order to announce the arrivalof the cage at any particular flat, an attachment may be applied which will cause a bell to ring at the moment when the cage reaches the flat for which it has been set.

We are aware that it is not new to open and close the doors of the hatchways by means of ropes connected to drums which are operated by the movement of the elevator-cage, such in- 3 5 vention forming the subject-matter of the patent of J. W. Kohl, dated December 2, 1879,

No. 222,285; and therefore we do not broadly 7 claim the use of ropes for automatically operating hatchway-doors bythe movement of the elevator-cage.

What we claim as our invention is- 1. In a hoist provided with independentlyacting doors, an endless rope or band provided with branch ropes or bands connected to the doors, in combination with a cage provided with movable arms and projcctingcatches or brackets on the endless rope or the doors, substantially as and for the purpose specified.

2. In a hoist, a sliding door provided with a projecting arm, in combination with stops on the check-rope, and the check-rope, whereby the motive power moving the cage is stopped by the opening of the door, substantially as specified. t

3. In combination with an endless rope-or band having branch ropes and catches or projections on the cage, and sliding doors or endless rope, as described, a projecting arm on one of the sliding doors and stops on the checklriope, substantially as and for the purpose speciw. F. SEXTON, SR. w. F. SEXTON, JR.

Witnesses:

O. W. BALDWIN, H. H. WARREN.

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