US1696327A

US1696327A - Elevator-door mechanism

Info

Publication number: US1696327A
Application number: US87768A
Authority: US
Inventors: Albert J Rosentreter
Original assignee: FRANK E HUTCHINS
Current assignee: FRANK E HUTCHINS
Priority date: 1926-02-12
Filing date: 1926-02-12
Publication date: 1928-12-25
Anticipated expiration: 1945-12-25

Description

-Dec. .25, 1.928.

, 1,696,327 A. J. ROSENTRETER ELEVATOR DOOR MECHANISM Filed Feb.- l2, '1925 2 Sheets-Sheet l Jigf,

BY 2 a l ATTORNEY Dec. 25, 1928;

I VA. J. ROSENTREFER ELEVATOR DooR MEQHANISM 2 Sheets-Sheet 2 Filed Feb. l2, 1926 BY f ATTQRNEY i Patented Dec. 25, 192.8. l Y

UNITED STATESA PATENT oFFlcE.

ALBERTI; BOSENT'BETER, OF BOONTON, NEW JERSEY, ASSIGNOR TO EDGAR ZABRI- BRIE, OF'MAPLEWUOD, NEW JERSEY, AND FRANK E. HUTCHINS, OF NEW YORK,

. `ELEVATOR-DOOR MECHANISM.

This invention relates to improvements in elevator door mechanisms and has particular reference vto nonreversing mechanisms for sliding doors.

In order to promote safety in the operation of elevators, it is necessary that each.

of the doors at the various landings be completely closed while the elevator is at some other landing. Serious accidents have been caused by irresponsible people opening elevator doors from the outside While the eleva tor `was not in position Ato receive passengers or the like through that particular door. Although a number ofpractical locking means as such have been devised, there is a possibility of carelessness on the part of the elevator operator which sometimes leads to leaving the door in a partly closed position. Vith the present invention, the possibilities of tampering with the door from the outside are reduced to a minimum, by requiring that the door be fully closed before it can be reopened.

An important object of the present invention is to provide an elevator door with a non-reversing mechanlsm which will practically eliminate the possibility of opening the door from the exterior of the elevator shaft.

Another object is to provide such a device which will require the door to be moved through its full limit of motion in closing it before `it can be reopened. y,

Another object is to provide such a device which will be simple in` construct-ion, strong and durable in service, economical to manufacture, and an improvement in the art.

Other objects and advantages will be apparent from the following description taken 1n connection with the accompanying drawings, wherein a referred embodiment of the invention iss own by Way of illustration.

In the drawings, Figure 1 is a fragmentary view of an elevator door equipped with the non-reversing mechanism of this invention,

l the door being shown in closed position;

Figure 2 is a View similarto Figure 1 and showing the `door partly opened;

Figure 3 is anenlarged detail elevation of the non-reversing mechanism;

Figure 4 is a horizontal, sectional view on the line 4-4 of Figure 3;

Figure 5 is a View similar to Figure 3,

Vend pivoted as at 17. to

showing the relative positions of the` parts as the door is commencing to open;

Figure G is a view similar to Figure 5 after the` parts of the non-reversing me--v chanism have become disengaged; and

Figure Tis another view similar to Figure 5, showing the action of the non-rcversing mechanism. in holding the door against re* versal at an intermediate position.

In the drawings, the reference character 10 designates a sliding elevator door of any ordinary or preferred construction, and 1l is the usual panelcd door or stationary wall. Secured to 'the inner surface of the door l() is a mounting plate 12 whichmay be held by screws 13 or other `suitable fastening elements, and pivoted tothe mounting plate by meansof a bolt 14 is a door opening lever 15. The lever 15 is provided with a handgrip 1G at one of its ends and has its other a toggle link or the like 18, to which, if desired, may be con-v nected a check mechanism 19 suchas disclosed in my United States Letters Patent No. 1,487,027, issued March 18, 1924. The

lever 15 and link 18 are preferably so proportioned and assembled as .to be in horizontal alinement when the door is fully closed, as shown in Figure 1.

Inorder to revent reversal of movement of the door wit iin certain limits of its travel, aratchet member 20 is pivotally mounted upon the plate 12 for actuation by and with the lever 15, said ratchet member havingV a plurality of teeth 2l arcuately disposed upon one of its edges. Also, pivoted as at 22, upon the plate 12 is a pawl 23 which is shown in the drawings as having a T-shaped body with a pointed nose 24: for engagement with the teeth 21 on the ratchet. The depending portion 25 of the pawl 23 serves as a balance weight so that the Vpawlwill normally maintain a position as shownin Figures 3 and 6, and it is free to move about its pivot 22 under the force of gravity.

`Then the door l0 is in its closed position as shown in Figure 1, the pawl 23 and ratchet 2() are out of engagement. As the lever 15 is actuated by theelevator operator to open the door l0, it moves in a direction indicated by the arrow A in Figure `5,

upwardly to a positionshown in Figure 5 to permit passage ot the ratchet by the pawl. The movement and Athe disposition of the ratchet and pawl are preferably such that when they are in mesh during the opening of the door, it cannot be closed until such a range of opening movement of the door is ell'ectuated as to carry the ratchet out of mesh with the pawl. This is because of the fact that the ratchet and pavvl bind and automatically lock the door if an attempt is made to close the door while the pawl is rocked in the manner shown in Fig.

5. lVhen the opening movement of the door is continued so that the ratchet EZ() moves beyond the influence of the pawl 23, as shown in Figure 6, lthe pawl swings about its pivot 22 to assume its normal position.

In closing the door the operation is similar but in a reverse direction, and, in view of the factthat the `pawl 23 is tree to move in either direction` about its pivot Q2, the

nose 24; ot the pawl will he moved downwardly by the ratchet 20, as shown in Fig ure 7. When the non-reversing mechanism is in this position, the door is almost entirely closed, and any attempt at reversing the movement ,to reopen the door will be stopped by the pawl 23 automatically locking with the teeth 2l of the ratchet. In order to reopen the door it is, therefore, necessary that the door be completely closed so that the lever l5y assumes its original horizontal position and the ratchet 2() passes entirely beyond engagement with the pawl 23.

It when the door is. in an open position a sudden and strong movement should be imparted to the operating lever 15, the pawl 23 would have a tendency to swiner completely about its pivot and this would prevent proper engagement of the nose ot the pawl .with the teeth of the ratchet. Therefore, in order to prevent overthrow of the pawl, a stop pin 2G extends outwardly from the surface of the plate l2 and is so disposed as to prevent passage of the depending portion 25 of the pawl.

From ,the foregoing, it will be evident that a non-reversmg mechanism for elevator doors has been provided which is of eX- treme simplicity and which will be thoroughly dependable in use. By its use iinproper opening of the elevator door, by 1rresponsible people, from the outside ot the shaft will not be possible. The invention is of course susceptible ot modilication, and the right is herein reserved to make changes in the form, proportions, and arrangement of parts, being limited only by the scope ot the appended claims.` i

Having thus described my invent-ion, what I claim is:

l. In a mechanism of the character described, the combination with a sliding door having means for inovinglthe same to open or closed positiomof means bodily movable with 'the door to prevent reversal of movement of the `door in an intermediate position during its movement in eitherH direction.

2. In a mechanism of the character de scribed, the combination with a sliding door having means for moving the same to o )en or closed position, of pawl and rate 1ct mechanism movable with the door and` cooperating to prevent its reverse movement from an intermediate position during its movement to either open or closed position.

3. In a mechanismot the character dcscribed, the combination with a slidingr door, of a lever pivoted to the door and adapted to slide the same in either direction, a ratchet movable with the pivoted lever, and a pawl pivoted on the door to engage the i 1 ratchet, whereby to permit the continuons travel of the door in either direction and to prevent its reversal at intermediate points near the closing end of its travel.

a. In a mechanism of the character described, the combination with a sliding door, of a lever pivoted to the door and adapted to slide the same in either direction, a ratchet pivoted with the lever and mov able therewith, and a pawl pivoted on the door to engage the ratchet during the move ment of the door, said pawi and ratchet being out of engagement when the door is in either of its extreme positions whereby to swing the pawl to permit passage of the ratchet in either direction, and the pawl preventing reverse movement of the ratchet. from an intermediate point at the closing end of the doors travel.

5. A non-reversingmechanism for elevator doorscomprising a ratchet, and a grav ity actuated pavvl pivotedfto swing in either direction whereby.. to alternately act upon the pawl in opposite directions, said pawl and ratchet being mounted for relative movement as an elevator door is moved, and being out of engagement with each other when the door is in either of its extreme positions. p y

6. A non-reversing mechanism for sliding doors, comprising door operating means, and, in combination therewith, means` for automatically locking such operating means against movementin a direction reverse to a movement oit the operating means in a given direction, such' locking means comprising interengaging members respectively en the door and the door operatingmeans, and acting only intermediately of the ends of the movements of the operating means.

ALBERT J. ROSENTRETER.