US 1681545 A
Description (OCR text may contain errors)
Aug. 21, 1928.
P. LANG ELEVATOR DOOR OPERATING MECHANISM Filed 1 2 Sheets-Sheet Aug, 21, 1928.
, P. LANG ELEVATOR DOOR OPERATING MECHANISM Filed Aug. 1. 1922 Q Sheets-Sheet Patented Aug. 21, 1928.
IUNITED STATES 1,681,545 PATIENT" OFFICE.
PHILIP LANG, OF CEDAR FALLS, IOWA, ASSIGNOR TO WAGNER MANUFACTURING COMPANY, A CORPORATION OF IOWA. 3
' .ELEVATOR-DOOR-QPERATING MECHANISM.
Application filed Augustl, 1922. Serial No. 579,001.
My invention relates to improvements in elevator door operating mechanism.
The object of my invention is to provide an operating means for double doors for elee vators which practically eliminates thenoise usually found in suchdoors, and which 15 accomplished by flexible chains or cables or the like and maintaining both ends, connected to the different doors, under equal tension. I y
Another object of my invention is to absolutely prevent the possibility of any ac.- cidental interference of any of the movable parts with one another or with any of the stationary parts and also prevent any sagging of the flexible operating means OISlClG lash thereof and thus obtain as nearly as practical a noiseless door. 1
Another object of my invention, is to provide anoperating means in which any loose connection of thedoor or the operating art is automatically taken up and thus pro uce an operating means having a material advantage over those now on the market.
A still further object of myinvention .is to provide a simple, cheap and effective operating means of this character having certain details of structure and combination of parts hereinafter fully set forth.
In the accompanying drawings Fig. 1 is a side elevation of a sliding/elevator door with my invention applied there; to;
Fig. 2 is atop plan view of Fig. 11;
Fig. 3 is a top plan view similar to. Fig. 2 showing my invention applied to a four door arrangement;
Fig. 4 is a transverse sectional view taken on the line H of Fig. 1;
Fig. 5. is a transversesectional view taken on the line 5-5 of Fig. 3..
Referring now to the drawings, izrepre sents the track arranged at the opening in the elevatorshaft and which as shown is formed of'two U-beams 2 and 3 bolted to.- gether' by bolts 1 having the washer abetween the same, so as to form the space 6 between the same, the purpose of which will be later described. The track as will be understood extends slightly beyond the door opening. I The inner U-beam 2 is supported to the wall of the elevator shaft by means of brackets 6' as shown in Fig. i of the drawings. While I have shown and described this specific form of track it Will be underto the door carrying beam 13.
stood that any form could be used provided provision wasmade for the ball or roller carrying plate, sothat the same prevents. the transverse movement of the roller carryin plate. y
,in the formshown in Figs. 1.-2 and 4 of the drawings, the doors 7 and 8 are secured to the hangers 9 and 10 by bolts 11 and said hangers are connected by bolts 12 This beam as indicated at 13, Fig. i, is formed by two U-beams 14: and 15 bolted together and having their inner abutting walls at their lower ends cut away asindicated at 16 and 17 to form the longitudinal groove .18 in its lower face. Theball carrying plate com: prises a plate bar 19 arranged on edge in a vertical. position and having at proper intervals the struck out portions 20 and 21 arranged on each side forming ball retainers for the [balls 22 and whereby the carrier is free to travel on the track with the plate between the U-beams 4 and also in the groove 18. These balls are free to rotateinthe plate and whereby a free and even rolling action of thebeam 13 isypermitted. There is no positive connection between the ball carrying plate and hanger beam, but the saidbeam is previ ded'with downwardly extendingarm 23 adapted to engage the lug 24 carried by the ball carrying plate when the door is moved in one direction and to engage the lug 25 carried by the plate when movedinthe opposite directiomallof which will be later described.
I heretofore described/each door 7 and 8 fl'is provided with two hangers 9 and 10 rigidly seci'ired to. their respective beams. The track at its ends is provided with pulleys 26 and 27 over which passes the two cables 28 and 29. These cables can be of any desired form and can be in the form of a chain if desired. The inner hanger of each door is provided with brackets 3031' bolted or .otherwisesecured thereto and 'hav laterally turned ends 32. .Secured to the laterally turned portion of the bracket 81 is a' coiled spring 3'3Iwhich has its top.-
posite end secured to the'cable 28. Theeable 28 as described passes over the pulley 26 and has its other. end secured to the bracket 30 carried by the hanger 9 of the door 7 Also secured to the bracket 30 is a coil spring 34 which has its opposite end secured to the cable 29. The said cable passes over simultaneously operated.
the pulley .27 and has itsopposite end secured to the bracket 31 carried by the hanger 9-ot the door 8.
By this structure it will be seen that upon the operation of either door the other door is This is accomplished in the following manner. The door 7 is moved to the right as indicated by the arrow in Fig. 1. This movement of the door pulls on the cable 28, it being attached to the bracket 31 of the hanger 9 of the door 8. This starts the door 8 to move in the opposite direction as indicated by arrow, Fig. 1. The spring 34 gives door 7 a gradual starting movement and at the same time the cable 28 is holding the spring 33 under tension and the doors are simultaneously moved in the opposite direction under spring tension from both ends whereby a gentle starting of the door is obtained without practically any noise.
The supports of the hangers roll on the balls and travel twice the distance than the balls themselves and the plate in which they are enclosed; thereby causing the balls to partially follow the carrying beams in the direction of travel and thus'make it possible to use a shorter ball train than the length of the track. In case the motion of the ball retainer plate, in either direction, is impeded and the door carrying beam caused to slide over the balls, then towards the end of travel of the door carrying beam, the arm 23 abuts against either of the lugs 24, causing thereby the ball retaining plate to correct its location'with regard to the door carrying beam. 3
In the'modification shown in Figs. 3 and 5, I have shown a four door arrangement embod ying my invention. In this form the two tracks 35 and 36 are constructed 'in precisely the same manner as that shown and described in respect to thetrack' 1. These tracks as shown are arranged side by" side in the same horizontal plane and are preferably supported by the brackets 37. In this form two doors travel in one direction and two doors in the opposite direction and in Fig. 3 I have shown two doors moving in one direction, the other two doors being broken away but it will be understood that the operation of each pair of doors will be the same. The two doors carrying beams 38 and 39 are constructed the same as that shown in the two door construction and the ball retaining plates 40 and 41 are constructed the same as heretofore described. The hangers 12 and 413 of the outside door are secured to the beam 39 and the hangers 44c and 45 of the inside door extend upwardly on the inside of the inner track and secured to the beam 38 as shown in Fig. 5 of the drawings. Secured to the inner beam 88 of the inside door are two brackets 46 and 47 which extend down and are secured to the ball retaining plate'al door as'shown in Fig. 5. p
The outer track at each end is provided with the pulleys 49 the same as shown and described in the preferred form and passing over the same are the cables 50 which are connected to the brackets 51 of the outside door hangers the same as shown in the of the outside preferred form so that as either of the midby the brackets d6 and 47 with the ball retaining plate are caused to travel with and at the same speed as'the retaining'plate 41, which is half the speed and'con'sequently half the distance that the outer door beams travel. By this means the outer and inner doors of each set when open, starting from a position, side by side at the end of the track will move to a position edge to edge as in Figure 3, when the doors are closed. Likewise the outer doors will travel at'twice the speed of the inner doors and having traveled twice the distance arrive simultaneously with the inner doors at the end of the track.
1. The combination with two sets of sliding doors, a ball carrying plate for each door, cables connected to the outer door of one set and extending in opposite directions around pulleys and having theiropposite ends having a'spring connection with the outer door of the other set and operating means carried bythe ball carrying plates of'the outer door of each set.
2. The combination with two sliding doors moving inv opposite directions, cables connected to one door and extending in'opposite 1 direction around pulleys and spring connection with the other door and means for causing the inner door to travel at half the speed of the outer door.
3. The combination with two sets of sliding doors, cables connected to the outer door of one setand extending in opposite direction'aroundpulleys and having a spring connection with the outer door ofthe otherset and means for allowing of afast movement of the outer doors of each set so that both doors reach their limit of movementjin either direction at the same time.
4. The combination with two tracks arranged side by side, fourball carrying plates rolling on said -tracks, four door carrying members rolling on said balls of the plate,
a spring tension cable attached to the door carrying member of one of the outer doors and extendingaround a pulley and connected to the door carrying member of the other outer door, a spring tension cable connected to the last mentioned door carrying memberand extending around a pulley and connected to the first mentioned door carrying member connections between the rear door carrying members and the ball carrying plates on the outer tracks and engaging members carried by the outer door carrying members and adapted to engage lugs carried by the ball bearing plates whereby the moving of one of the outer doors causes the other outer door to move by the cables at a rapid speed so that all of the doors reach their limit of movement in either direction at the same time.
5. In combination with two tracks arranged side by side, ball carrying plates rolling on said tracks, door carrying members rolling on said balls of the plates, a cable connected to the door carrying member of one of the outer doors and extend around a pulley and connected to a spring connected to the door carrying member of the other outer door, a cable connected to the last mentioned door carrying member and extending around a pulley and connected to a coil spring, connected to the first mentioned door carrying member, connected between the rear door carrying member and the ball carrying plates on the outer track and engaging members carried by the outer door carrying member and adapted to engage lugs carried by ball bearing plates whereby the moving of oneof the outer doors causes the other outer door to move by the cables at a rapid speed so that all of the doors reach their limit of movement in either direction at the same time.
In testimony whereof I afiix my signature.