US1041704A - Lock for sliding doors. - Google Patents

Description

H. G. VOIGHT. LOCK FOR SLIDING DOORS.

Patented 0ct.15, 1 912.

QSHEETHHBET 1.

Wilt/(E8859 INVENTOR EQW/GHT I a 20:71:11 I Q,

ATTORNEYS APPLICATION FILED MABHZ, 1912.

H. G. VOIGHT.

LOOK FOR SLIDING DOORS.

APPLIOATION FILED MAR.2, 1912.

. 1,041,704.- Patented 0qt.15,1912.

2 SHEETS-SHEET 2.

WIT "8858 INVENTOR MTORHEYS COLUMBIA PLANOGRAPH C0.,WI-SHINOTON, D. c.

win STATES HENRY G. VOIGI-IT, OF NEW BRITAIN, CONNECTICUT.

LOCK FOR SLIDING DOORS.

Specification of Letters Patent.

Patented Oct. 15,1912.

. Application filed March 2, 1912. Serial No. 681,253.

To aZZ whom it may concern:

Be it known that I, HENRY G.

VoIeHT, a citizen of the United States, residing at New Britain, Hartford county, State. .of.

Connecticut, have invented certain new and useful Improvements in Looks for Sliding Doors, of which the following is a full, clear, and exact description.

This invention relates to looks for sliding elevator doors and the like of the type employing closing lever connections, and is designed to afford means which will automatically lock the said lever connections agalnst opening movement when the door is closed, but which may be manipulated by an operator to release the locking means and to of feet the opening of the door.

A. preferable embodiment of the invention is illustrated in the accompanying drawings in which,

Figure l is a view in side elevation showing the invention applied to the door of an elevator well. Fig. 2 is a horizontal sectional view through the well casing showing the parts in top plan. Fig. 3 is a view in elevation showing the locking means engaging with and locking the toggle lever connection against opening movement. Fig. 4 is a view in side elevation showing such means in unlocked position and the parts in the position assumed when the door is open. Fig. 5 is a vertical section on the line M, Fig. 3. Fig. 6 is a vertical section through the lever guide, taken on the line 6-6, Fig. 1. Fig. 7 is a horizontal section on the line 5-5, F i 3.

I have illustrated my locking device as applied to door closing mechanism of the general type illustrated in my pending application, Serial No. 673,287 and embodying a closer cylinder suitably mounted upon the well casing, and a pair of levers forming a toggle, one end of which is pivotally mounted upon the door casing and is connected with the piston of the closer cylinder, and the other end of which is secured to -the forward edge of the door. The closer cylinder contains means normally actuating said toggle to close the door.

Referring to the drawings by numerals: 1 indicates the casing of an elevator well forming a stationary abutment independent of the door; 2 a sliding door in said casing and 3 a bracket mounted upon the well casing at a point distant from the door and having pivotally mounted at its lower end a door closer cylinder 4.

5 indicates a lever member having one end pivoted to the upper portion of the bracket 3, and having riveted to each face thereof reinforcing strips 5 spaced from the ends of the lever. The free end of the lever 5 is embraced between the ends of spaced bars (3 forming a second lever member 6 and is pivotally secured thereto. The other end of the lever 6 is pivotally mounted upon the forward edge of the door in a manner to be hereinafter described, and these two levers together form a toggle. The lever 5, at a point adjacent its outer or rear end, is provided with a transverse arm 7 which is connected to the inder 4E. The parts so far described are of the general type of door actuating device illustrated in my pending application hereinbefore referred to.

In order to retain the levers of the toggle closely adjacent the door and well casing and to prevent them from sagging, I prefer to employ guiding means, in the present instance embodied in the form of spaced guide strips 9 mounted upon therear edge of the door 2 and inclosing between them the spaced bars 6 of the lever member 6.

Mounted at the inner or forward ends of the bars 6 comprising'the lever member 6, and having its outer or rear edge inclosed therebetween, is a segmental plate 10. At their inner or forward extremities, the bars 6 and the plate 10 therebetween are pivotally mounted upon a door plate 11 by means of a headed pin or bolt 12 which extends from a countersunk recess in the outer strip 6 through apertures formed in the plate 10, inner bar 6 and through the plate 11, and which is held to said plate by a nut 13 en gaging with its threaded end and fitting in the countersunk recess in the rear face of said plate. The lever member 6 and the segmental plate 10 will, therefore, turn on this stud 12 as a pivot, the rear edge 10 of the segmental plate being formed as the arc of a circle with said stud as the center.

Secured to the forward edge of the door at a point above the plate 11 in a second and upper door plate 14: provided with a hub portion 15 having a concentric annular recess 15* surrounding a central stud 15 which extends out beyond said hub and has its outer end reduced and threaded. Within piston rod 8 of the closer cylthe annular recess 15 is mounted a coil end l8 formed as an arc with the hub 15as' the center for said are. At its end this extension 18 is provided with cheek plates 19 secured to either face thereof and extending beyond its arcuate edge and below its inner or forward edge, as shown. The arcuate edge 10 of the segmental plate 10 moves, therefore, in a circle with the stud 12 as the center, and the curved end of the extension arm 18 moves in an intersecting arc with the stud 15 as its center. The plate 10 has its edge at 1O cut away to form a curve corresponding to the curve of the end of the extension 18, and with the segmental plate and toggle lever, cooperates with the locking lever in the following manner: The pivot points of the arm 18 and of the lever 6 and its plate 10 are so positioned, and said plate and arm so constructed, that when the door has been closed, the end of the extension 18 will just clear the extremity of the arcuate edge 10 and will be'moved by its spring into the curved recess 10 of the segmental plate to lock the plate against upward or door-opening movement the plate therefore acting as a locking abutment. The parts are so designed that if in this position the locking lever 17 is moved on its pivot independently of the plate 10 and lever member 6, its curved end 18, being of the same curvature as that of the recess 10 and having a limited movement independent of the segmental plate, will swing out of said recess and permit the toggle to be broken and the levers to be moved to door-opening position.

Workmen, in assembling a device of this character, frequently make slight errors in measurements, and in order to enable the segmental plate 10 to be correctly adjusted relative to the end of the arm 18 of the locking lever 17, I secure this plate 10 between the lever members 6 adjustably in the following manner: This plate, adjacent its rear or curved edge 10*, is provided with a curved slot 23 curved on an arc, with the bolt 12 as the center. A bolt 24 is inserted from'the rear of the back lever bar 6 and extends through this slot and through the front lever bar, and is clamped thereagainst by means of a nut 25 so that when it is desired to move the plate 10 relative to the lever member 6, it is only necessary to loosen the nut 25, move the plate to its desired position, and then, by screwing down on the nut 25, the plate is securely held in this adjusted position. Y 1

In order to operate the locking lever to unlock and open the door, I prefer to extend its body portion 17 downwardly to form at its lower end an offset handle portion 17% Adjacent its forward end, the outer bar 6 of the lever member 6 is provided with a guide plate 20 spaced from said bar and guiding between it and said bar the actuating lever 17 the handle thereof extending below said guide bar as shown. This bar 6 and guide 20, at their forward ends, are extended beyond the pivot point 12 of the lever member and are preferably riveted together.

outermost bar 6 by the same nut 25 which serves to clamp the segmental plate 10 in adjusted position. I have heretofore stated that the coil spring 16 normally tends to throw the lever into locking engagement with the end 10 of the segmental plate 10, when the door is closed. I prefer to employ a stop for the movement of the lever 17 which will prevent it swinging beyond pl atelocking position, and to this end, insert between the guide 20 and its bar 6 and at the forward end thereof, a bufferstop 21 preferably in the form of a pin having an outer sleeve of rubber.

From the foregoing description it will be seen that when the door is closed by the action of the closer cylinder 4., the segmental plate 10 swings downwardly until the end of the extension 18 of the locking lever clears the curved edge of said plate and drops behind said plate, its curved end 18 engaging in the curved recess 10 and the handle 17 abutting against the bufferstop 21. In order to move the arm 18 from locking engagement with the segmental plate 10, the handle of the locking lever 17 is moved to the right from the position shown in Fig. 3 toward that shown in Fig. t until said lever strikes against a friction roller 22- mounted between the guide 20 and its strip 6 at the end opposite the buffer-stop 21. Then the lever has moved so far, the end of its extension 18 will have cleared the curved edge of the segmental plate 10, its cheek plates 19 inclosing be tween them the curved edge of the plate 10. Further movement of the lever 17 will exert pressure against the friction roller 22, forming a relatively stationary abutment, and break the toggle and move the door to opened position, the curved edge of the plate 10 moving upwardly during this operation and being guided between the inclosing cheek plates 19 of the locking lever. \Vhen the door is to be closed, the handle of the locking lever is released and the closer cylinder will move the toggle members to close the door. During this movement the segmental plate 10, with the lever member 6, will move downwardly from the position shown in Fig. at to that shown in Fig. 3,

The guide 20 at its rear end is held to the the curved edge of the plate 10 being guided between the cheek plates 19 ot' the locking member, and its curved end 18 riding over the end of the plate 10 as the door closes, and dropping into locking engagement with the curved face or recess 1.0? of said plate, thereby locking the toggle against opening movement. In this closing movement, the forward extensions of the cheek plates 19, which project beyond the curved end of the extensionlS, will guide this curved end of the plate as it clears the edge of the plate and drops into locking engagement therewith. 7

While I have shown my locking device applied to a specific door-operating means, it is susceptible of application to modified forms thereof, and is itself capable of varia tion and modification within the spirit of my invention and of the appended claims.

What I claim, therefore, and desire to secure by Letters Patent is:

1. In device of the character described, the combination ofa door casing, a sliding door, a lever pivoted to said door and con nected to said casing and swinging with the opening and closing movement of said door, a movable locking device carried by the door, an abutment carried by and oscillating with the movement of said lever, said abutment being positioned by said lever when the door is open to engage and re strain said device from looking movement and said abutment being positioned by said lever upon the closing of the door to release said locking device to permit it to move relative to and beyond said abutment to thereby lock said door against-opening movement, and means whereby said look ing device may be withdrawn from locking position and whereby said door may be opened.

2. In a device of the character described, a sliding door, a movable arm carried thereby, a connection for said arm independent of the door, an operating handle carried by the door, a movable locking device controlled by said handle, and an abutment carried by and moving with said arm, said abutment being positioned by said arm when the door'is open to engage and restrain said locking device from looking movement and said abutment being positioned by said arm upon the closing of the door to release said locking device to permit it to move relative to and beyond said abutment to lock said abutment and its arm against'door-opening movement.

3. In a device of the character described, a sliding door, a movable lever carried thereby, a connection for said lever independent of the door, an operating handle carried by the door, a movable locking device controlled by said handle, an abutment carried by and moving with said lever, said abutment being positioned by said lever when the door is open to engage and restrain said locking device from looking movement and said abutment being positioned by said lever upon the closing of the door to release said locking device to permit it to move relative to and beyond said abutment to lock said abutment and its arm against door opening movement, and closing mechanism for said door operatively connected with said lever to move the latter in a direction to move said door to closed position.

4. In a device of the character described, a sliding door, an arm pivotally mounted near one end on said door, a support or connection independent of the door for the other end of said arm, said arm being movable relatively to said door and to said independent support, an operating handle carried by the door for moving the latter, said handle having a limited independent movement relatively to said door, an abutment carried by and moving with said arm, said abutment being positioned by said arm when the door is open to engage and restrain said locking device from locking movement and said abutment being positioned by said arm upon the closing of the door to release said locking device to permit it to move relative to and beyond said abutment to lock said abutment and its arm against door-opening movement, said locking device being controlled by the said independent movement of said handle.

5. In a device of the character described, a sliding door, a toggle lever connected at one end to said door, a cooperating toggle lever for the other end of the first mentioned toggle lever, a support for said second toggle lever, means for moving said toggle levers normally in a direction to transmit a closing movement to the door, a door operating handle carried by the door and capable of limited independent movement relatively thereto, a movable locking device, an abutment carried by and moving with said first mentioned toggle lever, said abutment being positioned by said lever when the door is open to engage and restrain said locking device from looking movement and said abutment being positioned by said lever upon the closing of the door to release said locking device to permit it to move relative to and beyond said abutment to lock said abutment and its lever against door opening movement, and means of connection between said handle and said locking device whereby the latter may be moved from looking position preparatory to opening the door.

6. In a device of the character described, a sliding door, a lever connected at one end thereto and having a swinging movement relative thereto with the opening and closing of the door, an independent support for the other end of said lever, a part carried by said lever and oscillating with the movement thereof, a locking member mounted on said door and moving in a line intersected by said oscillating part, said part being constructed and arranged to restrain said looking member from looking movement while the door is open and to be moved beyond the line of movement of said locking member by the swinging movement of said lever when said door is closed whereby said locking member may move past said oscillating part and be positioned in the path of door opening movement thereof to block the same.

7. In a device of the character described, in combination, a stationary abutment, a sliding door, a lever pivoted to said door and connected to said abutment and swinging with the opening and closing of the door, a segment carried by said lever to oscillate with the movement thereof, a locking lever pivotally mounted on said door and having a part swinging in an arc intersected by said oscillating segment, said segment being constructed and arranged to be swung beyond the arc of movement of said lever part by the swinging movement of said door lever when said door is closed, means automatically positioning said lever part beyond said segment and in the path of door-opening movement thereof when said door closes, and means whereby said locking lever may be actuated to move said lever part from such position and to open said door.

8. In a device of the character described, in combination, a stationary abutment, a sliding door, a lever mounted on said door and connected to said abutment and swing ing with the opening and closing of the door, a part carried by said lever oscillating with the movement thereof, a locking member mounted on said door and moving in a line intersected by said oscillating part, said oscillating part being constructed and arranged to be moved beyond the line of movement of said locking member by the swinging movement of said lever when said door is closed, means whereby, when said door closes, said locking member may be moved past said oscillating part and positioned in the path of door-opening movement thereof, and means adapted upon a preliminary actuation to move said locking member from said locking position, and

adapted upon further actuation. to open said door.

9. In a device of the character described, in combination, a stationary abutment, a sliding door, a lever pivoted to said door and connected to said abutment and swinging with the opening and closing of the door, a segment carried by said lever to oscillate with the movement thereof, means for adjusting said segment relative to said door lever and said locking part, a locking lever pivotally mounted on said door and having a part swinging in an arc intersected by said oscillating segment, said segment being constructed and arranged to be swung beyond the arc of movement of said lever part by the swinging movement of said door lever when said door is closed, means automatically positioning said lever part beyond said segment and in the path of door-opening movement thereof when said door closes, and means whereby said locking lever may be actuated to move said lever part from such position and to open said door.

10. In a device of the character described, in combination, a stationary abutment, a sliding door, a lever pivoted to said door and connected to said abutment and swinging with the opening and closing of the door, a segment carried by said lever and oscillating with the movement thereof, a locking lever pivoted to said door and provided'with an arm adapted to swing in an arc intersected by the arc of movement of said segment, said arm being adapted to engage the edge of said segment and said segment being constructed and arranged to be swung beyond the arc of movement of said arm by the swinging movement of said lever when said door is closed whereby said arm may be moved past said segment and be positioned thereagainst in the path of dooropening movement thereof to thereby lock said door, and means whereby said arm may be moved from such locking position and whereby said door may be opened.

11. In a device of the character described, in combination, a stationary abutment, a

sliding door, a lever pivoted to said door and connected to said abutment and swing ing with the opening and closing. of the door, a segment pivotally mounted upon said door and adjustably secured to said lever at its free end and oscillating with the movement of said lever, a locking lever pivoted to said door and provided with an arm adapted to swing in an arc intersected by the arc of movement of said segment, said arm being adapted to be engaged and restrained by the arcuate edge of said segment and said segment being constructed and arranged to be moved beyond the arc of movement of said arm by the movement of said door lever, when said door is closed, means swinging said arm beyond said segment when it is so moved and positioning it thereagainst in the path of door-opening movement thereof to lock said door, and means whereby said locking lever may be actuated to move said arm from locking position and may actuate said door lever to open said door.

12. In a device of the character described, in combination, a door casing, a sliding door, a lever pivoted to said door and connected to said casing and swinging with the opening and closing of said door, a segment pivotally mounted on said door concentrically with said lever and secured thereto at its lower edge and oscillating with the movement of said lever, a lockinglever pivoted to said door and provided with an arm swinging in an arc intersected by the arc of movement of the edge of said segmentand adapted to be engaged and restrained by said edge, means whereby the movement of said door lever, when said door closes, oscillates said segment to bring its edge beyond the arc of movement of said arm, means antomatically swinging said arm beyond said segment when it is so moved and positioning said arm thereagainst in the path of dooropening movement of said segment to lock said door, and means whereby said arm may be moved from such position and whereby sflaid door lever may be actuated to open said oor.

13. In a device of the character described, in combination, a door casing, a sliding door, a lever pivoted to said door and connected to said casing and swinging with the opening and closing of said door, a segment pivotally mounted on said door concentrically with said lever and secured thereto at its lower edge and oscillating with the move ment of said lever, a locking lever pivoted to said door and provided with an arm swinging in an arc intersected by the arc of movement of the edge of said segment and adapted to be engaged and restrained by said edge, means -for angularly adjusting said segment relative to its lever and to said arm, means whereby the movement of said door lever, when said door closes, oscillates said segment to bring its edge beyond the arc of movement of said arm, means automatically swinging said arm beyond said segment when it is so moved and positioning said arm thereagainst in the path of door-opening movement of said segment to lock said door, and means whereby said arm may be moved from such position and whereby said door lever may be actuated to open said door.

14. In a device of the character described, in combination, a door casing, a sliding door, a lever pivoted to said door and connected to said casing and swinging with the opening and closing of said door, a segment pivotally mounted on said door concentrically with said lever and secured thereto at its lower edge and oscillating with the movement of said lever, a locking lever pivoted to said door and provided with an arm swinging in an arc intersected by the arc of movement of the edge of said segment and adapted to be engaged and restrained by said edge, means whereby the movement of said door lever, when said door closes, oscillates said segment to bring its edge beyond the arc of movement of said arm, means automatically swinging said arm beyond said segment when it is so moved and positioning said arm thereagainst in the path of door-opening movement of said segment to lock said door, a stop for limiting the locking movement of said lever, means for actuating said locking lever to move said arm from looking position, and an abutment engaged by a further actuating movement of said lever and adapted to move said door lever to open said door.

HENRY Gr. VOIGHT.

Witnesses GWENDOLINE A. JACKSON, M. S. WIARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington, D. G.

Corrections in Letters Patent No. 041,704".

1t isshereby certified that in Letters-Patent No. 1,'O.&1, 704, grantedjQctober 15,; 1912, upon the application of Henry G. Voightr of-New Britain,- Connecticut, for an improvementin. Locksfor'Sliding Doors, errors appear in the printed specification requiring correction ars followsz Page fa, lines 1, 26, and 535-:t, strike out the word concentrically; samepage, lines 2-3, 2728, and 5%55, for the Words at its lower edge read and extending therefrom; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 29th day of October, A. D., 1912.

[SEAL] C. C. BILLINGS;

Acting Commissioner of Patents.

Images