US1094909A - Closing and locking device for sliding doors. - Google Patents

Description

- J. KOHN.

CLOSING ANDLOGKING DEVICE FOR SLIDING DOORS.

APPLICATION FILED 0GT.22,1918.

1,094,909, Patented Apr. 28, 1914.

3 SHEETS-SHEET 1.

W/T/VE88E8 4% p W MW ATTORNEY J. KOHN.

CLOSING AND LOOKING DEVICE FORSLIDING DOORS.

APPLICATION FILED OCT. 22, 1913.

Patented Apr. 28, 1914.

3 SHEETS-SHEET 2.

INVENTO J. KOHN.

CLOSING AND LOCKING DEVICE FOR SLIDING DOORS.

APPLIGATION FILED 001:.22, 1913.

1,094,909, Patented Apr. 28, 1914.

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STATES PA @FFTQE JACOB KOHN, OF NEW YORK, N. Y.

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To (/7? 107mm it may concern Be it known that I, JACOB KOIIN, a sub jcct of the King of Hungary, and resident of the city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Closing and Looking Devices for Sliding Doors, of which the following is a specification.

The present invention relates to slidingdoor closing and locking devices,'and is specially adapted for use in connection with the doors leading to elevator shafts and the like, although not limited to that use.

The main object of the present invention is to provide a simple, inexpensive and efficient lock for a sliding door, said lock coopcrating with a device for moving the said door to closing position, means being provided in said lock for holding said last named device, at will, against closing movemont.

Another object of the invention is to provide a device of this character which can be manufactured on a commercial scale, or in other words one which is not so diflicult to produce as to be beyond the reasonable cost of such an article.

lVith these and other objects in view,

which will more fully appear as the nature of the invention is better understood, the same consists in the combination, arrangement and construction of parts hereinafter fully described, pointed out in the appended claims and illustrated in the accompanying drawings, it being understood that many changes may be made in the size and propor tion of the several parts and details of construction within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

Two of the many possible embodiments of the invention are illustrated in the accompanying drawings, in which Figure 1 is a view in elevation of the slid ing door of an elevator shaft with the device of the present invention applied thereto, the view being taken from the inner or car-side of the elevator shaft and the door being in its closed position; Fig. 2 is an enlarged front elevation of the lock with the parts in their closing positions, its cover being we moved to more clearly show the interior construction; Fig. 3 is a similar elevation of the lock with the parts in diiferent positions;

Specification of Letters Patent.

Application filed October 22, 1913.

Patented Apr. 28, 1914. Serial No. 796,658.

Fig. 4 is a horizontal section taken through the means which moves the door to its closing position; Fig. 5 is a plan view of this means F 1g. 6 is a side elevation thereof; Fig. 7 1s a section taken through a detail of construction; Fig. 8 is a fragmentary view in elevation of a sliding door equipped with a modification of the invention; and Fig. 9 1s a horizontal section taken through a modified means for shifting the door toward and into closing position.

Referring now more particularly to Figs. 1 to 7, inclusive, the numeral 10 indicates the slidingdoor of an elevator shaft, which together with a stationary door 11 extends substantially throughout the width of the opening of the elevator shaft, the door 11 being hinged at 12, 12 to the door frame, thereby permitting both doors to be swung outwardly as a whole so as to permit large objects to be loaded upon and to be taken from the elevator car. The locking and closing mechanism of the door is applied to the inner or car-side of the door. The lock comprises a casing 13, that is attached by screws, or otherwise, to the sliding-door, and contains a catch let, in the form of a dog, that is pivoted at 15 to the casing, and provided near its lower free end with a horizontal extension 16, having a rounded edge 17 for a purpose hereinafter to be described. A spring 18 bears against one end of the easing and the catch, and tends to force the latter toward the front edge of the lock casing. A catch actuating lever 19 is fulcrumed at 19 to the lock casing, one of its arms, denoted by the numeral 20, being adapted to contact with the said catch, while its other arm, denoted by the numeral 21, ex tends through an aperture 22 in the lock casing out of the latter, where it is connected with an operating rod 23, that projects through a guide 24 and extends throughout the width of the door. The arm of the catch actuating lever carries a lug 25, to which is fastened one end of a spring 26, the other end of which is secured to a stop 27. This spring tends to draw the lug 25 into contact with the peripheral face of a disk tumbler 28, that turns around a pivot 29. The tumbler is provided with a substantially triangular notch 30, adapted to cooperate with the door closing means hereinafter to be described, and with a notch 31, into which the lug 25 abovementioned is seated when the said tumbler is shifted iround its pivot in a manner hereinafter o be specified. The stop 27 is disposed within a recess 32 in the said tumbler, the edge 32} oi said recess bez'iring against; said stop when the parts of the lock mechanism occupy the positions shown in Fig. 2 of the drawings, in which the door is in its closed position. in its front and upper edges the lock casing is provided with an 01 ening 3i, r ugh which extends into the same a link i hat is tulcruined at 36 to the lock casing, its inner wedge-shaped end 37 engaging the horizontal extension 16 of the catch it when the door is closed, and the notch 30 in the disk tumbler 38 when thedoor is open. 'ilhe outer end of the link 35 is connected with one end of a link 38 by the int r-media y of a door closing device pres ently to be described. The other end of the link. 3?} is pivoted a t 89 to a brackeet et-t), that its attached to the stationary door 11. The door closing mechanism, which. connects the links and comprises, broadly sp raking, a sprint o other suitable means tor causing a swin f Means 1 i ing motion oi said two links. i'nay be provided, for instance in the form of a check, which prevents the slamming oil the door. Before proceeding to describe the door closing means in detail, it is to be ol served that any suitable door check and closer connecting the links and 38 may be made use of, the one herein described being shown liar purposes of illustratioi only.

ll ith reference to 4t to (5, inclusive, ie numeral designates a casing, comprising a spring chamber l2 and a liquid cham- The spring chamber is provided vith a slot tt, through which is inserted the same the inner end of the link 'ie letter being attached to said casing by 41-5 and screws 45, or in any other itable manner. The outer end of the link 35 is also adapted to be inserted through the slot -.t-.tinto the said spring chamber and to more ireely within a slot i6, that extends in a plar e The end o the link 35, whi-h is disposeo v'thin the spring chamber 42, is provided with a square hole l-T, in which is seated the squared portion 48 of a shat't it), which extends through the spring chamber into the liquid chamber, as clearly shown in l ig. oi? the drawings.

The numeral 50 designates a sleeve, having a groove :t'ormed in. its side, and pro vided upon its upper end with a ratchet wheel tlat is engaged. by a pawl 53, which pivoted to the link The inner end oil? a spiral spring Si in the spring-chainher is lniok-shaped, and is seated in the groove 51 in the sleeve 50, the other end spring being attached to the side of h spring chamber. in the liquid chamber disposed a piston 55, that is connected l intermediary of a pitinan 56 with a at right angles to that of the slot bringing crank 57, which is attached to the lower end of the shaft if). The piston is provided with a port 58 in its front end, controlled by a 'alve an aperture 60 being provided in the rear end of the piston. The spaces in front and rear ot the piston are adapted to communicate through a iassage 61, which is controlled by a valve 62, to govern the flow of the liquid and the extent of the resistance of the same to the door closing operation oi? the spring 5+1; Suitable packing means (52 are provided for preventing the passage of the liquid from the liquid chamber into the spring chamber. The spring chamber is closed by a cover (33, wnich is provided. with an extension ti l, covering the slot l in the spring chamber. To prevent friction between the link 35 and the spring, a washer is disposed between the spring and said link. By turning the ratchet by mains of a key, the initial force of the spring 5%t may be regulated as desired, and it will. be seen that the force of the said spring ah 'a vs tends to turn the link in the direction of the arrow indicated in Fig. 1 of the drawings, that is to say away from th link 38. The movement of the door closing means, which as above described is attached to the link 38, is guided by a plate 66, that is attached to the inner face of the stationary door 11, and provided with an arc-shaped slot 67, into which projects a lug (38, that is carried by the casing ll When the sliding-door is in its cl osel position, the links and 38 are in the positions shown in Fig. l of the drawings, in which the inner wedge-shaped end 37 of the link 35 is in engagement with the horizontal ex tension 16 of the catch l t, such engagement;- being maintained by the spring 18. Obviously the sliding door cannot be opened thus from the loft side of the elevator shaft. To open the door, the operator swings the arm 21 of the actuating lever 19 in the direction of the arrow shown in Fig. 2 of the drawings, thereby disengaging the catch l-t from the link As soon as this disengagnaneuttakes place, the door 10 can be shifted to its open position, the links 35 and 38 then approaching each other, and the door closing means moving in an arc-shaped path until its lug GS abuts against the outer end ()9 oi the slot 6'7. in the meantime the wedgesiaped end 3? of the link is shifted around its pivot 36 and. is seated in the notch 30. lVhen the door reaches its fully open position, the tumbler 28 has been shifted by the link around its pivot 29, thereby the notch 31 into registering posi tion with the lug 25 upon the lever 19, the spring 26 then seating the said lug in the said notch, thus preventing disengagement of the link from the tumlialer whereby the door is held locked in its 0 )Qil position.

In order to close the door, the operator shifts by the intermediary of the rod 23 the arm 21 of the lever 19 in a direction oppo site to the arrow shown in Fig. 2 of the drawings, thereby releasing the tumbler 28. The spring of the door closing means, which has been in opening the door compressed, thus rendered operative, causing the links and 38 to move away from each other with the result that the door is moved toward its closing position. The end 3"? of the link 35 is thus disengaged from the tumbler, and the latter shifted until the edge 33 of its recess 32 abuts against the stop 27. The wedge-shaped end 3? of the link 35 rides over the rounded edge 17 of the extension 16 of the catch lat, and is brought into the position shown in Fig. 2 of the drawings. The mechanism in the liquid chamber of the door closing means prevents a slamming of the door. While the door is moving toward its open position, the piston 55 moves in the direction of the arrow shown in Fig. l of the drawings, liquid being freely admitted from the front of the piston to the rear of the same. lVhen, however, the door is closed by the action of the spring or, the valve 59 covers the port 58 and the liquid is forced from the front of the piston to the rear of the same through the passage 61, slamming being prevented by the resistance of the liquid to the operation of the piston.

A modification of the invention is shown in Figs. 8 and 9 of the drawings, dif ering from the one above described in that the door closing device lacks the means which prevents the slamming of the door, or in other words the casing 4L1 lacks the liquid chamber and the means located therein; otherwise the construction of the device is the same, its operation being also identical with the one above described. This modification is specially adapted for use in connection with heavy doors.

While her in a stationary door 11 has been described, to which the link 38 is fastened by the intermediary of the bracket d0, it is obvious that the invention may be applied to sliding-doors which are not com bined with stationary doors. in the latter case the bracket lO is obviously fastened to the wall of the elevator shaft or to the door frame.

ll hat I claim is 1. In a. device of the character described, the combination with a door frame and a sliding door, of a link pivoted to said door, a link fulcrumed to said frame, means con necting said two links tending in all positions of said door to move the latter into closing position, and a locking member mounted upon said door for locking said links against motion.

In a device of the character described, the combination with a door frame and a sliding door, of a link pivoted to said door,

a link fulcrumed to said frame, means con necting said two links tending in all positions of said door to move the latter into closing position, and a locking member mounted upon said door adapted-to engage the link pivoted to said door and to hold the latter in its closed position.

3. In a device of the character described, the combination with a door frame and a sliding door, of a link pivoted to said door, a link fulcrumed to said frame, means connecting said two links tending to move said door into closing position, a locking member mounted upon said door adapted to engage the link pivoted to said door and to hold the latter in its closed position, and mean adapted to engage said late named link when the door is in its open position to lock it therein.

4. In a device of the character described, the combination with a door frame and a sliding door, of a link pivoted to said door, a link fulcrumed to said frame, means connecting said two links tending to move said door into closing position, a locking member mounted upon said door adapted to engage the link upon said door and to hold thereby the latter in closing position, means for disengaging said locking member from said last named link to move said door to open position, and means upon said door adapted to engage the link thereon for automatically locking said links against motion when said door is in its open position.

5. In a device of the character described, the combination with a door frame and a sliding door, of means connecting said two elements tending to move said door into closing position, and a locking means upon said door adapted to engage said first named means for locking the latter against motion when said door is both in its fully open and closed positions.

6. In a device of the character described, the combination with a door frame and a sliding door, of a link pivoted to said door, a link fulcrumed to said frame, means connecting said two links tending to move said door into closing position, a lock casing mounted upon said door having an aperture through which the link pivoted to said door projects, a spring pressed catch in said casing adapted to engage the link projecting into the same for holding the latter in closing position, a lever in said casing adapted to disengage said catch from said link, said lever being provided with a lug, and a rotary tumbler having two recesses, one of the same being adapted to be engaged by the link upon said door and the other by said lug when the door is in its open position, whereby said links are locked against closing movement.

7. In a device of the character described, the combination with a door frame and a sliding door, of means connecting said two elements tending to move said door into (dosing position, locking means mounted upon said door for looking said first named mean against motion when said door is both in its :lfuily open and closed positions, and means for guiding the motion of said door closing means.

8. in a device oi the eharaeter described, the combination with a door frame and a sliding door, of a link pivoted to said door, a link :tnierinned to said door frame, means connecting said two links tending to move masses said door into elosing position, a locking member mounted upon said door for looking said links against motion, and means for retarding the closing movement of said first mentioned means.

igned at New York, in the county of New York, and State of New York, this l ith day of October, A. D. 1913.

JACOB KUHN.

Witnesses S. BIRNBAUM, SIGMUND Hnnzoo.

fiopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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