US735056A - Elevator-door-operating mechanism. - Google Patents

Description

No. 735,056. PATENTED, AUG. 4, 1903.

H. EITHER.

ELEVATOR DOOR OPERATING MECHANISM.

APPLICATION TILED MAB. 5, 1903.

NO MODEL.

.lflmllllllllllllllllllllllllllllllmllf THE NORRIS PETERS co wow-urns wuumcn'm, nv cv Iatented August 4, 1961 PATENT OFFICE.

HARRY BITNER, OF BERWYN, ILLINOIS.

ELEVATOR-DOOR-OPERATING MECHANISM.

SPECIFICATION forming part of Letters Patent No. 73 5,056, dated August 4, 1963.

Application filed March 5,1903- Serial No. 146,296. (No model.) I

To all whom, it may concern.-

Be it known that I, HARRY BITNER, a citizen of the United States of America, residing at Berwyn, in the county of Cook and State of Illinois, haveinvented certain new and usefnl Improvements in Elevator-Door-Operating Mechanisms, of which the following is a specification.

My invention relates to certain new and useful improvements in elevator-door-operating mechanisms; and its object is to produce a device of this class for use in connection with doors of the type wherein two doors are slid at different speeds and in the same direction away from the door-opening, one of the doors moving behind the other.

The particular object of the mechanism is to cause the two doors thus to move together, but at different speeds.

To this end my invention consists in certain novel features of construction, which are clearly illustrated in the accompanying drawings and set forth in this specification.

In the aforesaid drawings, Figure 1 is an elevation of the main frame of an inclosure the opening of which is provided with doors having my improved operating mechanism, the doors being shown in three dilferent positions, two of which are shown by dotted lines; and Fig. 2 is an end view of the doors with the wall of the inolosure, showing the operating mechanism, the view being in the direction indicated by the arrow in Fig. 1.

Referring to the drawings, A and B are suitable tracks of the ordinary type supported on the wall of the inclosure, which is indicatedby O.

D is the fast door, and it is supported upon the track A by brackets d and rollers d. E is the slow door, which is similarly supported upon the track B by brackets e and rollers c. To the top corner of the fast door is pivoted a link F by a bracketf. To the wall of the inclosure, adjacent to the opening provided for the doors, is pivoted a link G by a pin g, said link being pivotally connected at its other end to the link F. These two links, as here shown, are of the same length, their length being equal to the width of one of the doors and their brackets being so positioned that when the doors are closed the link F is horizontal and the link G is vertical. A link H connects the pivot be tween the two links F and G with a bracket h on the slow door E, the link H, as shown, being half the length of the links F and G and lying in line with the link G when the doors are closed.

The operation of this device will be readily apparent from the drawings, the parts being indicated by dotted lines in two other and difierent positions from that shown in full lines. In the first of these positions the reference-letters are similar, but are distinguished therefrom by primes, and in the second position, wherein the doors are fully 0pen,the letters are similar,but distinguished by seconds. It will be noted that as the doors move from the position indicated by D E, through thatindicated by D E to that shown by D E the link F swings from the position indicated in full lines downward from the horizontal through the position indicated by F and eventually into the vertical position indicated at W. Simultaneously the link G swings from the vertical downward th ough the position G to the horizontal position in dicated by G The junction between the two links F and G swings in an arc of a circle from its original position about the bracket 9 as a center, and as it moves it pulls upon the link H, drawing it through the position indicated by H to the vertical position indicated by H This, it will be noted, draws the slow door open and causes it to come to rest in its open position at exactly the same time that the fast door reaches its open position. The result of this connection is that the two doorsrare so synchronized that both reach their full-open and their full-closed positions at the same time. A lug I is provided at the margin of the slow door to engage with the fast door and prevent any undue length of slide on the part of the doors. It has a further object in that it permits the fast door to strike the slow door at the time when said slow door is moving very slowly and when little force is being exerted upon it, thereby pushing the door positively into the desired position. Also in starting from the open position the link F engages the lug I and carries the slow door along until the parts swing past the dead-center.

I realize that considerable variation can be made in the details of this construction, and I do not, therefore, desire to limit myself to the particular form herein described. I claim as new and desire to secure by Letters Patent 1. The combination with the framework of aninclosure having a doorway therein, of two parallel doors adapted, when extended, to.

close the opening, and when opened, to slide one alongside of the other, and a connection between the two doors and the inclosure comprising a substantially horizontal rod pivoted at one end to one of the doors, a second rod substantially vertical, pivoted at one end to the opposite end of the horizontal rod, said second rod being pivoted at its opposite end to the inclosure, and means of connection between said rods and the other door.

2. The combination with the framework of an inclosure having a doorway therein, of two parallel doors adapted, when extended, to close the opening, and when opened to slide one alongside of the other and aconnection between the two doors and the inclosure comprising a substantially horizontal rod pivoted at one end to one door, a second rod substantially vertical, pivoted at one end to the other end of the first rod and at the other end to the inclosure, and means of connection between the mutual pivot of the rods and the other door.

3. The combination with the framework of an inclosure having a doorway therein, of two parallel doors adapted, when extended, to close the opening, and when opened to slide one alongside of the other and a connection between the two doors and the inclosure comprising a substantially horizontal rod pivoted at one end to one door, a second rod substantially vertical, pivoted at one end to the other end of the first rod and at the other end to the inclosure, and a link connecting said rods to the other door.

In witness whereof I have signed the above application for Letters Patent, at Chicago, in the county of Cook and State of Illinois, this 14th day of February, A. D. 1903.

HARRY BITNER.

Witnesses:

RUSSELL WILES, CHAS. O. SHERVEY.

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