US1386194A - Safety attachment for elevators - Google Patents

Description

. MEYER.

SAFETY ATTACHMENT FOR ELEVATORS.

APPLICATION FILED AUG. 5, 1919.

Patented Aug. 2, 1921.

mwntoa (11H01 neufs mi //J nl LN OO Y @Vi/Immo UNITED STATES PATENT OFFICE.

GEORGE J. MEYER, OF MILWAUKEE, WISCONSIN.

SAFETY ATTACHMENT FOR ELEVATORS.

Specification of Letters Patent.

Patentednug. 2, 1921.

Application led August 5, 1919. Serial No. 315,510.`

lhlisconsin, have invented new and useful Improvements in Safety Attachments for Elevators, of which the following is a specication.

My invention relates to improvements in safety attachments for elevators. I

rIhe primary object of my invention is to provide means whereby doors at the respec tive landings of an elevator well or shaft may be utilized to lock the car at any given landing, and to simultaneously lock the controller lever when the car has stopped at the landing and the door has been opened.

A. further object of my invention is to provide means whereby an insecurely latched door will be prevented from opening after the car has left the landing, and whereby the operator of the car will be notified immediately in case any door is unlatched while the car is in motion.

In the drawings Figure 1 is a vertical sectional view of Va portion of an elevator shaft or well, drawn to a plane which intersects the car, and exposes the wall provided with the controllinglever and exit;

Fig. 2 is a sectional view of the upper portion of theV well, as shown in Fig. 1, drawn on line 2 2 of Fig. 1.

Fig. 3 is a cross sectional view, drawn onr line 3-3 of Fig. 1.

4 is an end view of the oscillatory member for locking the controlling lever, with dottedlines indicating said member in locking position, a fragment of the car wall being also illustrated.

Like parts are identified by the same reference characters throughout the several views.

The elevator cage or car 1 is actuated by one or more cables 2 along guide posts 3 of the well in the ordinary manner, the car being provided with a controlling lever 4 of ordinary type. The well is provided with walls, or with landing cages 5 at the various ioors 6, and each of these cages or sets of inclosing walls Lis provided with a door 7, which is preferably suspended from the walls 5 or any other suitable overheadsupport by parallel links 8 pivotally connected with the door near the respective sides thereof, as indicated at l9and also pivoted to the overhead support at 10. These links are obliquely disposed or inclined from a vertical position when the door is closed, and also when it is in full open position, whereby the door may swing with'V a pendulum motion, its lower margin being guided in a slot 11 formed in the floor 6. This means for supporting and guiding the door is made the subject of a separate application bearing even date herewith, and is not claimed herein. It is referred to merely lfor the purpose of explaining the means fornotifying the operator of an unlatched door, asv hereinafterv described.

Brackets or shouldered projections 14 and 15 are secured to the outer side of the wall 16 of the car, this being the wall provided with an exit 17, which registers with the doors 7 at the respective landings when the car is brought to a stop at such landings. Each of the doors 7 is provided with a curved bar -18 secured to vthe inner face of the door in a. position to Vpass between the projections 14 and 15 when` the car is in proper position, and the door is being opened. Therefore,l when the door has been opened, the bar 18 locks the ycar tothe door in such Va manner that the car cannot be moved vertically in either direction without either tearing away the door or breaking the bar 418 from the door. To prevent such an accident, I provide auxiliary means for locking the controller lever in neutral position, which will now be described. I

The inner face of the wall 16 of the car is provided with an oscillatory shaft 20 connected with the iwall by 'suitable bearing brackets 21 in which the shaft may oscillate. One end of the shaft is inv proximity to the exit 17, and is provided with an elbowed arm 22, which extends through a slot in the wall into the path of the bar 18, the latter being tapered or rounded at 23, whereby when the car is positioned yat a landing, and the door opened, the bar 18 will'strike the outwardly projecting end of arm 22, and push it toward the interior of the car, thereby oscillating shaft 20. Shaft 20 is provided with a set of arms 25 and 26 which normally project upwardly fromthe shaft, but which are adapted to swing towardy the interior of the car, and to receive controlling lever 4 between them'when said lever is in the vertical or neutral position, as illustrated in Fig. 1. Therefore, when these arms 25 and 26 are swung downwardly by the oscillating shaft 20 they will necessarily project across the path of the controllerlever 4 on each side thereof, and prevent the lever from being swung. in either direction from neutral 5 position. Inasmuch as it will be necessary tolbring the lever to neutral position in order to bring the car to rest at the landing, it

' is obvious that by opening the door the controller `lever is locked and the car is also locked to the door by the operation ofthe bar 18.

Any ordinary door latches 3Q and `31 may be employed to fasten `the door 7 in its respective full open or closed positions. When fully closed, bar 18 will, of course, be retracted not only from its locking position between the brackets or projections 14 and 15 on the outer face of the car wall, but it will also be retracted from the arm 22. As it isretracted from this arm, the shaft 2O will return to normal position under the tension of the retractingspring 33.

If the door 7 should be insecurelylatched in closed position, it will, of course, tend to swing toward open position immediat-ely, and thus prevent the car from starting by locking the controlling lever, and also locking the carto the door, as above explained. But if it should be held by the operator, or by an insecurely engaged latch in closed position until the car has moved away from the landing, it would, ofcourse, tend. to swing toward open position when released. To avoid injuriesv which might result in such case, I preferably connect the ends of a cable 35-to the bracketsy 14 and 1`5,and extend this cable around'pulleys 36 and 3'( at 'the top and bottom of the well. This cableopcrates as an endless cable, since the brackets 14 and A15 and the wall of the car form a means of connection between its ends.: The

cable'is so disposed that it crosses the paths tact therewith. The vibrations will be transmitted to the car'through the cable and noise will instantly advise the operator that a door has openech` The, cable will Ainthe meantime prevent the door from opening far enough to allow, any person on the associated landing to accidentally step from the landing into the `well,`but the car maybe operated and thereby brought to such landing, and the door properly closed by the operator `before proceeding on his way.`

` It will be' understood that my invention is tothe door through the bar 18, and 'the applicable to any form of elevator mechanism, and any form of door or door supporting devices may be employed at the respective landings, but the particular means for suspending the door as illustrated herein is preferred for the reason that an unlatched door will immediately tend to swing toward open position, anduwill therefore give immediate notice of the fact that it is unlatched in case the car is not at rest.`

1.'The combination with a landing door and car of an elevator mechanism, of a locking device secured to the door and adapted for interlocking engagement with the car when the door is open.`

2. The combination with a landing door and car4 of an elevator system, of means for interlocking the door with the car when the car is in registry with the landing and the door is moved toward open position.

3. In an elevator mechanism, a landing door, and a flange carried by the door and adapted when the door is opened to interlock with portions of an elevator car. Y

4. In an elevator mechanism, a landing door adapted, when opened, to move into interlocking engagement with the car, in combination with a car having a controlling lever, and locking devices for said lever, adapted to be actuatedto locking position by the door. Y

5. In an elevator mechanism, a landing door adapted, when opened, to move into interlocking engagement with the car, in combination with a car having a controlling lever, and locking devices for said lever,

adapted to be actuated to locking position by the door, and to automatically release the controlling` lever when the door is closed.

6. The combination with the Awalls and landings of an elevator well, of a car adapted to travel in said well, and provided with actuating mechanism, doors at the respective landings 'controlling admission to andV exit 110 from the well, and acableextending over pulleys at the top and bottom of the well, and connected with the car, said pulleys being adapted to support the cable in a position to limit the opening movement of each of the doors, except when the car is positioned at such door.

47. The combination with the walls and landings of an elevator well, of a car adapted to travelin said well, and provided with actuating mechanism, doors at the respective landings controlling admission to and exit from the well, and a cable extending over pulleys at the top and bottom of the well, and connected with the car, said pulleys being adapted to support the cable in a position to limit theopening movement of Veach of the doors, except when the car is positionedrat such door, and `means connected with the door for locking the car against vertical movement when the door has been opened to permit entrance to or exit from the car.

8. In an elevator mechanism, the combination with a car and a set of relatively stationary landing doors, of a traveling member connected to, and movable with the car, and adapted to hold distant doors in a substantially closed position.

9. In an elevator mechanism, the combination with a car and a` series of relatively stationary landing doors, of a car actuated door retaining device in continuous door stop relation to all doors in the series when the car is out of registry therewith.

10. In an elevator mechanism, the combination with a car and a set of relatively stationary landing doors, of a door controlling member connected to travel vertically with the car and adapted to hold all doors in substantially closed position when the car is out of registry therewith.

11. In an elevator mechanism, the combination with an elevator well and a car movable therein, of a moving door stop adapted to travel longitudinally along the line of car movement in correspondence with the movement of the car, and operative to hold all doors in substantially closed position, when the car is out of registry therewith.

12. In an elevator mechanism, the combination with a car and a landing, of a pendulous landing door, spaced apart projections carried by the car, and a curved flange carried by the door and adapted to pass freely between said projections to an interlocking position when the car is in reg` istry with the landing.

13. In an elevator mechanism, a car, a plurality of landings, doors at said landings, a locking member carried by each door,

and an interacting locking device carriedv by the car adapted to secure all doors against movement except that of the landing with which the car is in registry, and to interlock with the locking member of the particular door it allows to open.

14. In an'elevator mechanism the combination with a car provided with a oontrolling lever, of locking devices for said lever, a spring normally holding the locking devices out of lever engaging position, and landing doors, each provided with a controlling member adapted, when the door is opened, to swing the locking devices to locking position with a car at such landing and to move into interlocking relation with said car. A

155.v The combination with a landing door and car, of an elevator system, of interlocking members connected with the door and car respectively and adapted to allow the door to move freely into interlocking relation to the car when the door is opened and the car is in correct position oi adjustment without added resistance due to the interlocking members.

In testimony whereof I aiiiX my signature in the presence of two witnesses.

GEORGE J. MEYER. lVitnesses LEVERETT C. WHEELER,

O. C. WEBER.

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