US407110A

US407110A - Device for operating doors for elevator-wells

Info

Publication number: US407110A
Authority: US
Publication date: 1889-07-16
Anticipated expiration: 1906-07-16

Description

(No Model.) 3 eeeeeeeeee et- 1. W. E. NIOKERSON. DEVICE POR OPERATING DOORS POE ELEVATOB.. WELLS. 1

No. 407,110. Patented Ju1y 16, 1889.

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No. 407,110. Patented July 16, 1889.

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W. B. NICKERSON. DEVICE EOE OPERATING DOORS EOE ELEVATOE WELLS.

Patented' July 16, 1889.

UNITED STATES PATENT OFFICE.

IVILLIAM E. NICKERSON, OF CAMBRIDGE, MASSACHUSETTS.

DEVICE FOR OPERATING DOORS FOR ELEVATOR-WELLS.

SPECIFICATION forming part of Letters Patent No. 407,110, dated July 16, 1889. Application tiled March 23, 1889. Serial No. 304,521'. (No model.)

To aZZ whom it may concern:

Be it known that I, WILLIAM EMERY NICK- ERsON, of Cambridge, in the county of Middlesex and State of Massachusetts, have invent-ed a certain new and useful Improvement in Elevator Tell-Room Doors, of which the following, taken in connection with the accompanying drawings, is a specification.

The object of my invention is to so const-ruct an operating mechanism for elevator well-room doors that the force generated by the motion of the elevator-carriage may either directly or by accumulation be utilized at the option of the attendant for opening and closing the well-room doors at each iioor or landing. This object I attain by the mechanism shown in the accompanying drawings, in which- Figure l is a perspective view showing the mechanism that I use. This mechanism is shown as attached to parts of the walls of the well-room and to parts of the elevator-carriage, unimportant parts being represented as broken away for the purpose of better illustration. Fig. 2 is an elevation of a slidingI block with its pawls (shown in perspective in Fig. l) and a portion of the carriage, showing a part oi' an engaging-rod. Fig. 3 is a side elevation of the elevator well-roo1n,look ing from the inside, showing the door closed. Fig. i shows, partly in elevation and partly in vertical section,a portion of a latch-releasing device which is located on the door-casing of the well-room. Fig. 5 is the same as the view shown in Fig. 3, except that the door is represented as open.

In the perspective view, Fig. l, I have shown nearly' all the parts of my invention, and unless other figures are referred to Fig. l may be used in following the description.

The walls of the well-room are indicated by B.

door C is arranged to hook onto the sliding bolt K (see Figs. 1 and 4) when the door C is closed. The sliding bolt K is connected to a spring-plate K, (see Fig. 4,) and is provided with a recess 7.', through which the hook of the latch K2 may pass in case the recess is in a certain position. Otherwise the hook is held by the bolt K and the door cannot be opened. lVhen the attendant wishes the door to open, he depresses the lever footpiece II. This action throws the upturned end of the lever II against the lever H2, (pivoted at la) and in throwing its lower end outward causes its upper end h to take a position in which it will, as the carriage reaches a floor, come in contact with the spring-plate K and force it and the bolt K2 back, so as to cause the recess 7.; to come opposite to the hook of the latch K and thus allow the door to be opened by any strain that may be brought to bear upon it. It will be observed that the latch lf2 cannot drop low enough, on account of the stop k, for its hook to engage with that part of the bolt K that is at the bottom of the recess 7e'.

Referring to Figs. 3 and 5, L is a closelywound spring adapted for tension and ,attached to the well-room door C at c. This spring may be inserted into the body of the door or incased on the surface of the door, as may be deemed desirable. L is a chain or cord, one end of which is attached to the spring L and the other end, after passing between the grooved pulleys L2 L3, to the sliding block L". This block L4 slides on a square rod M, attached by bracket-pieces M M to the wall of the elevator well-room. On the sliding block D, I have two pawls L5 .6, pivoted at a and n', and so balanced that they will rest normally in the position shown in Figs. 1 and Z-that is, in such a position that they will actas buttresses for the rods E and D3 when either of them comes in contact. At each end of the rod M, upon which the block LV1 slides, I have stationary cam-pieces M2 M2, so made that when either of the pawls L5 L come in contact with its respective ca1npiece then it (the pawl) will be tripped and the rod E or D2, as the case may be, will be released.

To prevent a too abrupt return movement IOS) of the sliding block L4, caused by the recoil of the spring L on its release, l have attached to it a rod P and piston P', Figs. 3 and 5. This piston P works in a narrow cylindei` P2 loosely, so that while it will offer but little resistance to its proper movement it will ei'- 'fectually prevent any tendency to abruptness.

The spring S rests with one end against a part of the door C at S2 and with the other end against the block S ,attached to the wall of the well-room B The springS is provided with a rod S5, (see Figs. 3 and 5,) extending within the coils of the spring `from the block S, to whichrrit is'fastened, to a point just within the edge of the door when taken in its closed position. This rod serves to keep that part of the spring which is without the door from lateral buckling. The tendency of the spring S is to extend itself-that is, to push the door to its closed position-as will be explained below.

- For causing the block L4 to slide up or down on the rod M and to bring a tension on the springs L and S by drawing the end of the chain L up or down past the pulleys L2 L5, I have the following device, (see Fig. 1:)

D is a foot-piece for the lever D', the lever D being pivoted at d.

D2 is a Vertical rod adapted to slide up and down on the side of t-he elevator-carriage, as shown, and is operated by the lever D and foot-piece D.

E and D3 are sliding rods attached to the sides of the elevator-carriage, and are both actuated by the foot-piece D, through the lever D,rod D2, and bent levers E and D4.

The operation of my device is as follows: Ve suppose the carriage to be at the bottom,

the attendant starts it and allows it to con-V tinue its motion without further attention until the carriage nears a floor at which it is desired to open the well-room. Now the attendant depresses the foot-piece D, thus causing the rod D3 to slide so as to come in contact with the pawl L5, which will cause the block L4 to slide up on the rod M and draw the cha-in L and the attached end of the tension-spring L, so that although the door() will not be moved on account of the latchhook K2, the spring L will strain upon it and cause it to open as soon as released from the holding action of the latch-hook K2. Upon the stopping of the carriage the attendant can, by pressing with his foot the piece H,

free the latch-hook K2, and allow the spring L, which is now under tension, to draw the vdoor open. (See Fig. 5.) The act of drawing the door C open compresses the spring S, as

shown in Fig. 5, the tension force exerted by the spring L being sufficient to overcome the extensive force of the spring S.

The upward movement ot' the block L4, as above set forth, is not so great (before the carriage stops) at the landing as to bring the pawl L5 in contact with the cam-piece M2 and thus release the block L4. lf the carriage stops and the rod D3 is not with drawn from the pawls L5 L6, then the door, if not released, remains closed, but under the tension of the spring L, and consequent-ly under strain that tends to open it; but as soon as the elevatorcarriage starts up again the block L4 will be moved up on the rod M, so as to cause the pawl L5 to come inl contact with the cam-piece M2, which will, by throwing the lower end of the pawl` oit from the rod D3, allow the block L4 to return to its normal position-that is, to the position shown in Fig. l-the springL having returned to its unstrained condition.

If we assume that the carriage has stopped at a floor and that the doorChas been opened by the action of the block L4 through the cha-in L and spring L, and that the attendant wishes to close the door C, he removes his Jfoot from the foot-piece D. This allows the rod D3 to be drawn back by the action of the spring T on the lever D and to release the block L4, which, returning to its normal position, removes the'strain on the spring L and allows the spring S to close the door by its expansive force.

ln case the elevator-carriage does not stop at any intermediate floor, but ascends to the top, then the attendant need not actuate either lever until the carriage nears the last iioor. Then he will press the toot-piece D down, so as to bring the rod D2 into contact with the pawl L5, and thus cause the block; L4 to ascend and to draw on the chain L and set the spring L at tension ready to draw the door C back when released, as has already been set-forth.

In the descent ot' the elevator-carriage all of the parts operate the same, except that the rod E takes the function of the rod D2, and the block L4 descends instead of ascends, and that the pawl L6 and cam-piece M3 are brought into action.

It will be understood that there is a block L4 at each floor, and that it is adapted to slide up and down on its rod M, and that the controlling cam's and pawls operate the same way at each floor. AAt the lower ioor the campiece M5 may be dispensed with, and at the upper floor the cam-piece M2 may be dispensed with.

The subj ect-matter of my invention may be briefiy stated thus: Mechanism by which the power generated by the moving carriage of an elevator is by accumulation utilized at the option of the attendant to open and close the doors of an elevator well-room.

l claiml. In an elevator, the combination of the well-room door C, having a spring L and a spring S of less force, said springs being adapte- IOO IIO

2. In an elevator, a door C, having counteracting springs of different forces adapted to operate in opposition to each other, as described, with a movable block attached to the Walls of the eleva-tor Well-room and operated by the movement of the elevator-carriage, and a latch-hook K2, adapted to be released by a lever under the control of the attendant, substantially as described, and for the purpose set forth.

3. In an elevator, the combination of the door C, spring S, spring L, sliding block L4, and an elevator-carriage having rods adapted to engage with the sliding` block L4, substantially as described, and for the purpose set forth. f

4. In an elevator, the combination of the door C, the spring L, chain L', block L4, having paWls L5 L, the rod M, and cams M2 M2, With the elevator-carriage having engaging rods E' and D2, substantially as described, and for the purpose set forth.

5. In an elevator, the combination of the footlever D', rod D2, lever D4, rod D2, with sliding` block L4, having` pawls IL, chain L', spring L, and door O, having a retractor-spring S, substantially as and for the purpose set forth.

(i. In an elevator, the combina-tion of the latch-hook K2, the sliding bar K', having a recess k, with the spring-plate K and actuatinglever H3, substantially as and for the purpose set forth.

7. In an elevator, the combination of the door C, spring L, chain L', and block L4, adapted to be moved by the carriage, as described, With the piston-rod P, piston P', and cylinder P2, substantially as described, and for thepurpose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two sub scribing Witnesses, on this 21st day of March, A. D. 1889.

VILLIAM E. NICKERSON.

lVitnesses:

FRANK G. PARKER, MATTHEW M. BLUNT.