US2626018A - Elevator door interlock - Google Patents

Description

Jan. 20, 1953 Y w. HEALEY 2,525,018

' ELEYATOR nooR INTERLQCK Filed Dec. is, 195o Snventor IC. 22 I' a/iliam Healey Patented Jan. 20, v1953 UNITED STATES PATENT OFFICE ELEvA'ron noon INTERLcCK William Healey, Philadelphia, ra.

Application December 13, 1950, Serial No. 200,641

i (ol. la7-56) 3 Claims. 1

The present invention relates to elevator doors and is concerned primarily with an interlock that is provided between the door of the elevator itself and any of the doors leading into the elevator shaft.

At the present time it is common practice in the largel and more expensive buildings to provide some sort of power device for opening the doors leading into the elevator shaft. However, there are many smaller less expensive buildings which include elevators and in Which it is not practical to provide the power devices. Thus, both the elevator door itself is manually operable and the door at each floor leading into the elevator shaft is also manually operable. Such an arrangement is extensively used where the elevators are self-operated, that is, the passenger of the elevator performs the duties of the operator.

It is evident that with the arrangement above outlined, it is necessary for a, passenger in a car to perform two distinct operations, either in entering or leaving the car.' As he leaves the elevator he must first open the elevator doo-r and then lthe door between the shaft and the particular floor where the elevator is located and the re- `verse of this operation occurs when a passenger enters the elevator.

With the foregoing conditions in mind the present invention has in view as its foremost objective the provision of a mechanical interlock between the door of an elevator and any of the doors leading into the elevator shaft. With such an interlock the opening or closing movement of one door is accompanied by a corresponding movement of the door that is interlocked therewith.

The mechanical interlock of this invention is particularly adapted for use with doors of the sliding type. Thus, both the elevator door itself and the doors to the shaft should be sliding doors.

More in detail, the invention has as van object the provision of an elevator door having a projection extending outwardly from the outer face thereof. Each of the doors leading into the elevator shaft is formed with a vertically arranged socket that is open at both ends providing what is in effect a track through which said projection is adapted to pass. Thus, as the elevator moves upwardly o-r downwardly the projection on the elevator door will pass through the track formed by the sockets on all of the shaft doors when the latter are in closed position. However, when the elevator stops at any floor the projection of the door is received in the socket to establish the mechancial interlock between the door of the elevator and the shaft door.

Various other more detailed objects and advantages of the invention such as arise in oonnection With carrying out the above noted ideas in a practical embodiment will, in part become apparent, and in part be hereinafter stated as the description of the invention proceeds.

The invention, therefore, comprises a mechanical interlock between an elevator door and any of.' the several doors of an elevator shaft in which; the doors are of a sliding type and which inter-- lock permits of movement of the elevator past the shaft doors in closed position.

For a full and more complete understanding of the invention, reference may be had to the following description and accompanying drawing wherein:

Figure 1 is -a fragmentary View partially in elevation and partially in section of that portion of a building in which an elevator shaft is formed;

Figure 2 is a detailed horizontal section taken about on the plane represented by the line 2-2 of Figure 1.

Referring now to the drawing wherein like reference characters denote corresponding parts, a building in which an elevator is installed is referred to in its entirety by the reference character B. The building B may of course have any number of oors greater than one. VFor the purposes of this invention it is shown as having two floors FI and F2. The elevator shaft extends between these floors in a vertical direction. Slidably mounted on each of the floors FI and F2 is a sliding door I0 which leads from the particular floor into the elevator shaft. The particular structure which slidably mounts the doors I0 is not illustrated because it is not a part of the present invention. Sliding mountings of this type are well known and are extensively used.

Each of the doors I0 has an outer face II and an inner face l2. Mounted on the inner face I2 of each door are a pair of channel plates I3 and I4 which are supported by base plates I5 and I5. The plate I3 may be secured to the plate I5 and the plate I4 to the plate I6 in any preferred manner such as by welding and the base plates I5 and I5 are secured to the door I0 in any preferred manner such as by the screw bolts represented at I1.

The plates I3 and I4 complement one another and together define a socket which is open at its upper and lower ends and which socket is in effect a track. The upper and lower edges of each of the plates I3 and I4 are bevelled asindicated at I8 to provide what are in effect flared ends for the track defined by the plates.

The door of an elevator is represented at I9 'through these tracks which align when the doors are closed as the Yelevator moves upwardly and downwardly.Y The roller 22 ismounted on afbolt 23, the head 24 of which engages the inner face 20 of the door I9. A spacing collar 25 is inter;- posed between the roller 22 and the outer face u2| of the door I9. A nut 26 is threaded on the free end of the bolt and holds thergller -242 l position thereon.

While the operation of the interlock above described is believed to be obvious from the `description of the parts given, it may be briey outlined 4by nrstnoting thatnif the severaldoors IUien the `respective floors of fthe ,building are in closed position, the tracks -or passages dened by `the Vplates fl 3 and .t4 are in .vertical alignment.

as the elevator which carries the door ,I S moves upwardly and downwardly the roller 2 2 will pass through these aligned tracks.

.When the elevator Lstops at any floor the roller 22` is positioned and the `socket dened'by vthe platesl and 5,4 onthedoor at that floor, there byestablishing a mechanical interlockbetween f,

clearly. understood thvatlthe invention is not to be Ilimited l to the `.enact constructions, mechanisms, anddevices illustrated and described because various modiiications of these detailsmay be providedlin putting the invention into' practice Ywithin the purview of the appendeduclaims.

What claimed is:

,1 .I 114conibination, a plin'ality of sliding elevatorfshatdoors in vertical alignment-:Qa sliding elevatorhdoorgeach of said elevator 'shaftdoors .enigma .wie *a vascelli/'genes met that is open at its upper and lower ends with the several sockets on the several doors in vertical alignment, and a projection on the outer face of said elevator door adapted to pass through said sockets and assume a position in any one of them to establish a mechanical interlock between said elevator door and the shaft door having the socket in which the projection is received.

v2. In combination, a plurality of sliding elevator doors in vertical alignment each having outer and inner faces, a pair of complemental plates mounted on the inner face of each of said shaft doors with said plates defining a vertical track that is open at both ends, the tracks on said several doors being in alignment and with each A.track also constituting in effect a socket, an elevator door having outer and inner faces, and a projection on the outer face of said elevator door adapted to pass through said tracks and be operatively positioned in any of said sockets to establish ya Inecl'lanical interlock.

' 3j In combination,` a 'plurality of sliding ele vator shaft doors in vertical alignment each having outer and inner face-s, a pair of complemental plates mounted on the inner face of each of said shaft Ydoors with said plates'dening av Vertical track that is open at both ends, the tracks on said several doors being in alignment and with Veach track also constituting in effect a socket,

'rest in any of thev sockets defined thereby to establish a mechanical interlock.

VJILLIAM REFERENCES CITED The following references are of record in the leof this patent:

UNITED STATES PATENTS Number Name Date 2,458,402 Myers -l Jan. 4, 1949

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