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Publication numberUS752476 A
Publication typeGrant
Publication dateFeb 16, 1904
Publication numberUS 752476 A, US 752476A, US-A-752476, US752476 A, US752476A
InventorsRobert B. Stearns
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Stop-lock for sliding doors
US 752476 A
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Description  (OCR text may contain errors)

PATENTED FEB. 16, 1904;

R. B. ST AM-s.- STOP LOCK FOR SLIDING DOORS;

APPLIGATION FILED NOV. 21, 1903.

.-'N0 MODEL.

UNITED STATES Patented February 16, 1904.

ROBERT B. STEARNS, or CHICAGO, ILLINOIS.

STOP-LOCK Foni 'SLIDIINYG DOORS.

SPECIFICATION forming part of Letters Patent No..752,4'76, dated February 16,1904. Application filed November 21, 1903. Serial No. 182,110. (No model.)

"means of which such a door may be firmly held in any one of several predetermined positions and, if desired, locked in any one'of said positions.

The invention is particularlywell adapted to the sliding doors of railway-cars, which doors unless secured are opened and closed by the movement of the car, at times being suddenly and violently closed by centrifugal force when the car rapidly rounds a curve, thereby often injuring passengers whose hands or arms are caught between the door and the door- I- i 10, and-11.- This locking-rod is raised from jamb. In the accompanying drawings, Figure 1 is a fragmental view of a sliding door, showing an embodiment of my invention applied therej to. Fig. 2 is a transverse sectional view taken through the said door on dotted line 2 2, Fig. i 1. Fig. 3 is a side elevation of the operating mechanism, one side of the containing-case thereof being removed. Fig. 4 is a perspective View of said mechanism and a portion of f its casing. Fig. 5 is a detail section taken on g a line passing transversely through the door, showing the lower edge of the door and-its guide-rail. In the embodiment herein shown of this in- E vention, 1 is a sliding door supported inany suitable manner in the upper .part of the doori 'frame- 2. At its lower edge the door is pro,- '1

vided' with a shoe 3, having a longitudinal groove '4 therein. The threshold 5. provided with a raised rib 6, which rib is adapt- I 'edgto lie within the groove 4 in the lower edge i of thedoor and to act as a guide for said door. At 7, 8,9,10, and 11 the rib 6 is broken away, forming seats for the stop mechanism, tobe i hereinafter described. The forward edge of l the door '1 is .mortised to provide an. opening 1 '12," and belowthis opening said forward edge 5 isprOvided'with a groove 13, said groove13 7 suitable manner.

and the mortise 12 being connected by means of an opening 14. The mortise 12 and the groove 13 are closed by a cover-plate 12, se cured to theforward edge of the door in any Rigid guide-loops 15 are secured by any suitable meansas, forexample, by screws within the groove 13, said guides being adapted to receive the verticallyreciprocating locking-rod 16, from the upper end of which rod a connecting-rod 17 extends upwardly through the opening 14 into the mortise 12. A coil-spring 18 surrounds said rod 17 and is adapted to be compressed be tween a plate 19 (lying in contact with the upper end of the groove 13) and the upper'e nd of the bolt 16. The connecting-rod 17 is provided at its upper end with a yoke 20, having a screw-thread connection with said rod; The locking-rod 16 is held downward by means of the spring 18 and is adapted to automatically engage any one of the locking-pockets 7, 8, 9,

said pockets by the mechanism to be next described.

Escutcheon-plates 21, having keyholes22,

are secured to opposite sides of the door ad- 'jacent to the mortise 12, said plates being held in place by means of the integral posts 23 and screws 24. 1Each escutcheon-plate has a tubularboss 25 projecting outwardly from its outer face, the openings in". the bosses of the two escutcheon-plates being'alined and internally formed to receive stems 26 of the operatinghandle 27. These stems 26 are provided with enlarged inner ends and with rectangular axial openings 28. Their outer ends are screwthreaded to correspond with sore w-threaded sockets 29, formed in the handles'27, and both handles and stems are provided with transescutcheon-plates. In its lower margin the casing 31 is also provided with an opening 38 for the passage of the connecting-rod 17.

An operating cam 39 has integral trunnions adapted to lie within the operatingopenings 35, said trunnions being provided with a rectangular axial opening 40. A rod 41 rectangular in cross-section is adapted to fit within said opening 40 and at its opposite ends enter the rectangular axial openings 28 of the stems 26. The operating-cam 39 pivotally supports upon one of its trunnions a lifting-lever 42, recessed in its side to receive said operating-cam, the forward end of which lifting-lever has apivotal connection by means of the pin 43 with the yoke 20. The rear end of the lifting-lever 42 is provided with two locking-notches 44 and 45. The operatingcam 39 in its upward movement is adapted to impinge against an overhanging portion of the lifting-lever 42, raising said lifting-lever, the rod 17 and the lockingrod 16. The downward movement of the operating-cam 39 is transmitted to the lifting-lever 42 to raise said lever by means of a rocker-arm 46, pivotally mounted upon a stud 47 formed integral with the casing 31. The free end of the oper'ating-cam 39 is adapted to bear upon one end of the rocker-arm, the other end of said rocker-arm underlying the outer end of the lifting-lever 42. By means of the mechanism just described it will be seen that a movement of the operating-cam 39 in either direction tends to raise the locking-rod 16.

It sometimes is desirable to lock the door 1 in any one of its predetermined stop positions and at other times to withdraw the automatic stop device from action, leaving the door free to be slid in the usual manner. This locking mechanism will next be described.

A locking-bolt 48 is provided with an elongated opening 49, adapted to receive a guidestud 50, projecting inwardly from one of the sides of the casing 31. The bolt 48 has a keyway 51 and a guard tumbler 52, pivotally mounted upon said bolt. The guard-tumbler 52 is provided at its forward edge with a projection 53,. which projection is adapted to engage the upper or lower side of a fixed stop 54, formed integral with the casing 31. A spring 55 holds the tumbler 52 in a forward position, said spring being supported in a slit formed in the rear margin of the casing 31. The upper end of the locking-bolt 48 is adapted to engage either of the locking-notches 44 and 45, formed in the rear end ofthe lifting-lever 42, said locking-bolt being slid within the casing 31 by means of a key inserted into the keyhole 34 at either side of the casing. One of the bits of the key is adapted to throw back the guard-tumbler 52 before the other bit of the key engages the keyway 51 to slide said bolt. When the lifting-lever 42 is in its uppermost position, it may be locked by throwing the locking-bolt 48 into the notch 44. In this position of the lifting-lever the locking rod 16 is raised from engagement with the rail 6. The lifting-lever 42 may be locked in its lowermost position by throwing the locking-bolt 48 into the locking-notch 45. In this position of the lifting-lever the locking-rod 16 is held downward within one of the pockets 7 8, 9, 10, and 11 of the guide-rail 6.

The handles 27 are of crank form and preferably are placed upon the door, with their ends projecting upward. A pressure exerted in either direction upon the upper ends of the handles 27 raises the locking-rod 16 against the downward pressure exerted upon it by the coil-spring 18 and permits the free movement of the door in either direction. As herei'nbefore explained, the door will be held in any of its predetermined stopping positions by the automatic entry of the locking-rod into the pockets 7, 8, 9, 10,-and 11. One of these pockets is so located that the door may be locked in a closed position.

It is apparent that the embodiment herein shown of this invention is susceptible of various modifications without departing from the spirit and scope of my invention, wherefore I desire to have it understood that I do not limit myself to the precise details herein set forth.

I claim as my invention 1. In a sliding-door structure, in combination, a member provided with a plurality of locking-notches; a slidable door; a locking-rod slidably mounted with relation to said door.

and adapted to engage with one of said locking-notches to lock the door from movement in either direction; a spring tending to hold said locking-rod in position to engage with one of said locking-notches; and means for locking said locking-rod in or out of engagement with any of said locking-notches.

2. In a door-lock, in combination, a locking-rod; a lifting-lever; an operating-handle; and an operating-cam and a rocker-arm, each adapted to engage said lifting-lever.

3. In a door-lock, in combination, a locking-rod; a lifting-lever and an operating-cam pivotally mounted upon the same axis, said cam being-adapted to move said lifting-lever; a rocker-arm adapted to be moved by said cam and adapted to move said liftinglever; and means for pivotally moving said operatingcam. r

4. In a door-lock, in combination, a locking-rod; a pivotally mounted lifting lever having a pivotal connection with said lockingrod; said lever having a locking-notch therein; a slidable bolt adapted to engage said lockingnotch; a guard-tumbler pivotally mounted with relation to said bolt; and a fixed stop for said guard-tumbler.

5. In a door-lock, in combination, a pivotally-mounted lifting-lever having two lockingnotches in one of its ends; a locking-rod pivotally connected with the other end of said lever;

IIO

means for pivotally moving said lifting-lever; and a slidable bolt adaptedto engage either of the locking-notches in said lever.

6. In a door-look, in combination, a pivotally-mounted lifting-lever having a lockingnotch in one of its ends; a locking-rod pivotally connected with the other end of said lever;

an operating-cam and a rocker arm, each adapted to pivotally move said lifting-lever; and a slidable bolt adapted to engage the locking-notch in said lifting-lever.

7. In a sliding-door structure, in combination, a threshold provided with a plurality of locking-notches; a slidable door; a locking-rod either direction; a spring tending to hold said locking-rod in position to engage with any of said locking-notches; a lifting-lever for withdrawing said lockingrod from engagement with one of said locking-notches; and an operating-camand a rocker-arm, each adapted to move said lifting-lever.

' ROBERT B. STEARNS. Witnesses:

A. C. KITTLESON, L. L. MILLER.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4263795 *May 3, 1979Apr 28, 1981Brammall, Inc.Self-latching, semi-automatic door lock and opener
Classifications
Cooperative ClassificationE05B65/0864