USRE11402E - Safety device for elevators - Google Patents

Description

2 Sheets-Sheef- 1.

W. P. KIDDER. SAFETY DEVICE FOR ELEVATORS.

Reissued'Jan. "'30,, 1894.

\\\\\\\\\\H 5 llA/// ll i IIIIIIIIIIIIIIIIIIII" 2 Sheets-Sheet 2.

I W. P. KIDDER. SAFETY DEVIGE FOR ELEVATORS.

Reisslied Jan. 30,; 1894.

.wiweqaw UNITED STATES WELLINGTON l. KIDDER, OF BOSTON, MASSACHUSETTS.

SAFETY psvlcs FOR ELEVATORS.

SPECIFICATION forming partof Reissued Letters Patent No. 11,402, dated January 30, 1894. Original 1%- 495.094, dated April 11, 1893. Application for reissue filed September 1393- 59151 W ,5

To ail whom it may concern.

lieit known that I, WELLINGTON P. Krnnna, a cit1zen of the United States of America, residing at Boston,in the countyof Sulfolk and State of Massachusettah'ave invented certain new and useful Improvements in Safety Dcvlces for Elevators, of which the following is a specification, reference being had therein to the accompanying rawings.

This improvement is designed to provide a means for preventing the opening of doors of elevator cars and wells, except when the car 1s stationary and in line with a w'ell'door; whereby the many dangerous accidents now caused by starting the car before the door is closed will be prevented.

Previous to my invention, it had been proposed to combine'with swinging doors, stops on the controlling rope which would prevent the well-door'openingwhen the car was in.

motion and would look the rope fast by the opening of the door,but so far as I can ascertam, no one has ever combined. these stops with a sliding door. Swinging doors are inconvenient in elevators and are seldom'used with them, and the combination above referred to has, therefore,never, so far as-I am aware, come into practical use.

It has also been proposed to combine with a sliding door a kind of bell crank lever and a bolt in such a manner as to accomplish the same purpose, the said bolt being passed through a hole in a wheel around which the operating or controlling rope is wound. This, however, besides requiring attachments to the door to operate the lever, required at each doorway the lever, bolt and wheel above referred to, and moreover the rope had to be much longer so as to pass around the wheel at each door, the whole adding so much to the expense of construction that I believe the same has never come into practical use. My

invention is designed to accomplish the same I result without the many additional parts and the added length of rope referred to, requir ing in its simplest form only blocks or stops fixed on the rope, which rope is only of the ordinary length.

To this end my invention consists in the apparatus hereinafter described and shown and then definitely claimed at the end hereof.

In the accompanying drawings Fignro l is .a vertical section of an elevator, constructed according to my inventioh. Fig. 2 is a horn zontal section of the same, on the line a a: of Fig. 1. Fig. 2 is a detailshowing some of theparts in Fig. 2 in elevation on a larger scale. Fig.3 is afvertical section of part of an elevator taken at right angles to that shown in Fig. 1. Fig. 4 is a horizontal section of a modification. Fig.5 is a front view of the. door, rope, &c., of.the same. Fig. 6 is a side View of the same parts as in Fig. 5. Fig. 7 is a similar view with the parts in adilferent position.

Referring now to the details of the drawings by letterisrepresents an elevator well, in which travels the elevator carB, which may but as these. means form no part of my pres ent invention, it is unnecessary to describe them. p s

C 0 represent the doors of the well, each of ing too low when the door is open. I

. mechanism is moved. This is connected with a companion. rope II, in any convenient way, but at present I prefer to connect it as shown above and under another one (J-') below-the last one being mounted on a shaftj that operates the valve. I i

Attached to the companion rope are several blocks or projections L, preferably set between guides Z on the walls of the well, so as to work freely within said guides. These blocks are so set thatwhen the valve is closed and the car at rest, the upper and lower ones are slightly above and below lines drawn even with the top and bottom of the doorsrespectively, and the intermediate blocks are-set just between lines drawn even with the 'top of one door and the bottom of the one next above it. With this arrangement, it is evident that when the operating rope is moved to givemo be raised and lowered by any suitable means,

which. may be provided with a hooked latch.

in Fig. l,'by making the two ropes'of one con tinnous piece and passing it over a pulley J At H is shown the ordinary operating rope, by which the valve controllifig the'operating ion tionto the car, the companionrope will carry the tops of the'blocks L either above a line drawn even with the bottoms of the car and well doors or the bottoms of the blocks below a line drawn even with the tops of said car and 7 this,

well doors; as the case may be, andthus prevent any opening of the same. It will also be seen that when any one of the well doors is is open, said door will be between two of the blocks, and thus the operating rope cannot be set in motion until the well door is closed.

As a further security, I set doors K in the elevator car, which project slightly from the car, as shown in Fig. 1; and I attach flanges M to. the front walls of the well, so arranged that the door passes by the side of these flanges as the car ascends and descends, but cannot be opened when the car is in motion, as the edge of the door would come in contact with said flanges M. When, however, thecar is at rest and on a level with either of the doors in the elevator well, the door can be readily opened. It will further be seen that the door in the elevator car, when opened, will also act as a stop to prevent the movement of the operating rope, as said door will then be between two of the blocks and thus prevent any motion being given to the rope, so that the car cannot beset in motion when the car door is open. I

'By the combination of the blocks L and flanges M, the maximum of safety is obtained, because the flanges M prevent the car door being opened when the car is between the well doors, and 'theTblocks'L prevent its being" opened when opposite a "well door if the car is in motion. If the blocks L did not prevent the door might-- be opened, or partially opened, when the car was in line with either of the well doors although the car was in motion.

' In some cases,- I may use the arrangement shown in Figs. 4, 5, 6 and '7. In this case, at

each door of the well, a three-armed lever N- is pivotally connected at its center to a bracket 0 attached to the wall ot the well, and is also pivotally connected to a block L on the rope. These blocks may be attached to a companion rope, as in the form shown in Figs. 1, 2

' and 3, butl have shown them attached, in

this case, to the operating rope, which in this instance, is preferably arranged outside the car. The latter is provided with an aperture b in its side, through which the operator can pull the rope to stop or start the car. The lever N has two oli its arms 12 n in line with each other, and a third (71/) at right angles to the other two.

When the car is at rest, the arms n n of the lever N stand vertically and then the car door can be opened. When opened, the car cannot be started, as the arms n a of the lever will press against the door if any attempt is made to pull the operating rope, so that the latter cannot be moved, nor the car started with the door open. As soon as the door is closed, the rope can be pulled, and then one of the arms a of the lever will pass behind the edge of the door, as shown in Fig. 7, in which position the door cannot be opened until the rope has been again manipulated so 7: as tomove thelever into the position shown in Fig. 6, in which case the car is stopped.

For convenience in stating my claims, I shall refer to the blocks and levers, generically, as stops, and mean. to include thereby not only the devices shown but any equivalent ones. for the same purpose,- except in such cases where the devices shown are specificaily'named.

I have shown different ways of carrying out my improvement, but it is evident that other means may be employed, and-I do not, therefore, intend to limit myself to those shown in the drawings. For instance,instead of the rope shown, a wire or rod may be employed to carry the blocks L, and this rod or wire may form part of the operating rope, or be operated by any suitable connection therewith, and I should consider such rod or wire as an equivalent for the rope in the following' claims.

What I claim as new is- 1. In an elevator and in combination with a slidable door and a controller therefor, a stop movable into the path of the door and 5 simultaneously with the controller as said controller is moving to start the car. substantially as described.

2. In an elevator and incombinationwith the controller therefor, a stop connected to :00

"andmoving'with the controller, and a slid]- able door movable into the path of; said stop, substantially as described.

3. The combination in an elevator having slidable well doors, and with the car operat- :05 ing devices and the controller therefor and said doors, of a series of stops arranged to move vertically into the path of the slidable doors when the car is to be started and to stand over a door when said. vdoor is open, no substantially as described. V

4. The combination in an elevator and with the car thereof, of doors in both the car and well openings, a rope connected with the op-' erating devices, and'stops moved by said rope u 5 for fastening the doors in both the car and well closed when the car start-s, substantially as described.

5. The combination in an elevator and with the carthereof, of doors opening into the well, no a rope connected with the operating devices, and a series of stops moved by the rope and adapted to pass behind the edge of the doors when the car is started, substantially as described.

6. The combination in an elevator and with the car thereof,-of the door of'the car and fixed stops secured to the well arranged to prevent the opening of the car door except when in line with the well doors, substantially 139 as described.

7. The combination in an elevator and with the car, the door thereof and the operating rope, ot a series of blocks L secured to said rope, arranged to pass behind the edge ot the fastened in position while the door is open, car door when the rope is moved to operate substantially as described. the car, substantially as described and shown. In testimony whereof I afiix my signature, 8. The combination in an elevator and with in presence of two witnesses, this 18th day of 5 the operating rope and car thereof, of a series September, 1893.

of blocks L eonneeted'to said operating rope, WELLINGTON P. KIDDER. and a door for said can projecting from the Witnesses: body of the car and passing between two of FRED L. HARRINGTON,

the blocks when opened, whereby the rope is HERBERT L. GHAPIN.

Images