US1966415A - Doorlock - Google Patents

Description

July '10, 1934. M, M, MUNK 1,966,415

DOORLOCK Filed March 1 1933 Patented July 10, 1934 UNITED sTArEs PATENT OFFICE .DOORLOCK Max M. Munk, Washington, D. 0. Application March 10, 1933,Serial'No. 660,300

soiaims. v(c1. 70-29) This invention relates to door latch and lock assemblies. It relates more particularly to such assemblies for those doors that are intended to be locked against being opened'by an unauthorized person from one 'side only. ,The purpose of the invention is to simplify, to cheapen, and to improve the latch and lock design. According to the invention this is accomplished by employing a lock the locking action of which does not depend on its being firmly and positively fastened to the door. Such lock can accordingly be safely fastened from that side of the door against which the dooris intended to be locked. Fastening the look from that side leads to said simpler design and to other advantages.

These advantages stand particularly out when the invention is applied to rim locks, although it can be advantageously applied to all kinds of looks. A rim lock assembly with the lock proper attached to the inside of the door requires a long and clumsy key forbeing opened from outside, for the key has to be long enough to reach all the way through the full thickness of the door and into the look. It also requires a key- 25. hole through the door. This invention eliminat'es the keyhole through the door, and reduces the size of the key.

Such latch and lock assembly is obtained according to the invention by using a spindle both 3Q turnable and shiftable. Turning the spindle opens the latch bolt. A stop manipulated from inside may be set to block the turning of the spindle. The. spindle can then nevertheless be set free for turning bybeing shifted. A lock manipulated from outside is provided for blocking the spindle from being shifted.

It is accordinglythe broad object of the presentinvention to provide for a simple and easily installable latch and lock assembly.

40 His another object of this invention to pro vide for such rim latch and lock assembly.

It is 'a further object of this invention to provide for a door latch and lock assembly with a lock fastened from outside the door, its locking action being not dependent on such fastening.

A still other object of this invention is to provide for a doorrim latch and lock assembly with the latch bolt fastened to the one side of the door and the lock fastened to the other side of the door.

inside for blocking the opening of the latch bolt by turning the spindle, the latch bolt being set free from the blocking action of the stop by shifting the spindle.

A still further object of this invention is to provide for a rim door latch and lock assembly with a latch on one side of the door, a lock bolt on the other side of the door, a spindle moving rotatably and axially in a holepassing through the door, said latch being adapted to be retracted by the rotation of the spindle, and said lock being adapted to block the axial motion of the spindle.

It is at last an object of this, invention to provide for such latter latch and lock assem' bly closing but never locking its door from one side, and which can be set for either closing but not looking the door from the other side, or in the alternative for positively locking the door from that other side, so that then the door can-- not be opened from that side without first opening the lock.

These and other desirable objects and advantages of the present invention will be illustrated in the accompanying drawing and described in the specification, a certain preferred embodiment being disclosed by way of illustration only, for since the underlying principles may be in.- corporated in other specific devices, it. is not intended to be limited to the one here shown except as such limitations are clearly imposed by the appended claims.

In the drawing like numerals refer to similar parts throughout the several views, in which Fig. 1 represents a vertical cross-section through the latch and lock assembly at right angles to the door,.

Fig. 2 represents an elevation of the lock as sembly with the casing cut open for showing the inside, and the handle cut away,

Fig. 3 represents an elevation of the latch assembly,

- Fig. 4 represents an elevation of the latch assembly in Fig. 3 with the casing cut open for showing the inside,

Fig. 5 represents the spring 35 of Fig. 1 in elevation,

Fig. 6 represents the lock assembly of Fig. 2 with the casing; intact, and

Fig. 7 representsthe latch bolt and the stop of Fig. 4 in cross-section and in elevation respectively, showing their relative position.

In Fig. 1 there is shown a spindle 20 of cy-i lindrical cross-sectionpassing through the hole .11 f door 10. The outdoor end of the spindle is bent into the handle 21. Two grooves 22 and 23 are out around the cylindrical surface of the spindle, five holes 24 are drilled therethrough near its indoor end.

The lock casing 30 and the hollow bottom 31 enclosed by said lock casing are screwed to the outside of the door by means of screws 12. Between said casing and bottom are inserted two slidable tumbler plates 32, ordinarily pushed down to their extreme downward position by their gravity and by the spring 33. The turnblers 32 are slightly bent out of their plane, so that in their upper part they lie side by side in the same plane, but in their lower part the one is on top of the other. At said lower part they are sufficiently cut out to permit the insertion of a key i through the keyhole 41 of casing 30, the key bit being turned downward, until the end 42 of the key rests in a key guide provided in the bottom 31 by punching a round hole 43 therethrough. The key can then be turned and after about one half revolution will lift up the tumblers 32. These tumblers project ordinarily I into the groove 22, but when lifted by means of the correct key indentations 3d of both tumblers will come in line with the outer circumference of spindle 20 and will then release said spindle for axial shifting motion, in the indoor direction. This shifting will take place automatically under the action of a spring 35 located under the hollow bottom 31, said resting with one end against said bottom, and projecting with its other end into the groove 22 of the spindle.

By means of screws 13 there are fastened to the inside of the door the latch casing and the bottom plate 51. A latch bolt 52 projects out of the casing under the action of the spiral compression spring 53, and engages with the keeper 70 when the door is closed. The latch bolt is guided by the casing along the two prongs 55 and 55. Screwed rigidly to the spindle by means of bolts and nuts 26 passing through holes 24 are two handle plates 25. They extend through an opening 54 of the casing 50, shaped so as to permit a rotation of the handle by about degrees in either direction, and their lower corners 27 are in contact with the brackets 56 of latch bolt 52.

There is at last provided a stop 60 rotatably inserted between the casing and plate 51 in a recess of prong It projects through said casing at 59, its handle 61 extending out of the casing, and its other hook shaped end 62 being inside the casing. The sidewall of casing 50 is interrupted by a hole 63 to permit turning down hook 62 about the upper edge of opening 59 as fulcrum. When hook 62 is turned up by turning down stop handle 61, said hook fits and engages handles locking or stopping thereby from being turned. Handle 25 can be disengaged and set free for being rotated in two diiierent ways, either by turning handle 61 whereby hook 63 is moved out of the region of handles 25, or by axially shifting spindle 20 so that handles 21 and 25 move from the positions drawn solidly in Fig. 1 into those positions drawn in dashed line, and handle 25 moves out of the region of stop 60. Handle 25 is then to move over stop 50, but remains in engagement with latch bolt 52, because brackets 5s extend farther away from the door than hook 62, and handle 25 is not separated far enough from door to move also freely over the brackets 56.

When free entrance to the door without the use of a key is desired, the latch being merely intended to keep the door from swinging in the wind, stop handle 61 is turned down into the neutral position; spindle 20 is preferably kept shifted all the way outdoors, so that the tumblers 32 project into the groove 22. The door is then opened from either side by turning the handle 21 or 25 in either direction. One of the brackets 56 will then be pushed back by a corner 27 of the right handle plate 25, and thus the latch bolt retracted. When it is however desired to keep the door locked against unauthorized persons, handle 61 is turned down, and spindle 20 shifted all the way outdoors. Both can be done from inside after the door has been closed. For bringing about the same locked condition of the door from outside there are two methods. Handle 61 may be turned down with the door open, and the spindle shifted outdoors, and the door may then be closed by slamming it, forcing the wedge shaped latch bolt back by impact and into the keeper by the action of spring 53. Or, in the alternative, the spindle may be shifted in its neutral indoor position, by the use or" the key if necessary, handle 61 may then be turned down, the door may be gently closed while the latch bolt is retracted by turning handle 21, and said handle is then pulled out until tumblers 32 fall into the groove 22. In this condition, the door can be opened from inside without the use of the key, by turning up handle 61 and then turning handle 25. In the For installing the latch and lock assembly,"

hole 11 drilled, handle 25 and the latch assembly, but not the lock assembly are removed from the spindle, and the latter is pushed through the hole 11 from the outside until the lock casing has come in contact with the door. The latch assembly is then slipped over the spindle, the spring 53 being compressed by a knife or similar instrument, and the handle plates are screwed to the spindle in the like compressed condition of the spring, handle 25 being in contact with the door while casing 30 is in contact with the door and tumblers 32 projecting into the groove 22. Screws 12 and 13 are then inserted.

It will readily be seen that unscrewing screws 12 in the locked position of the door will not set free spindle 20 for being rotated, since it does not permit said spindle to shift into its neutral position indoors. Screws 12 are not essential for locking the door.

It is claimed:

1. A door latch and lock assembly having in combination a spindle adapted to be turned and shifted, a handle mounted on said spindle, a latch bolt retractable by the turning of said handle, a stop adapted to be set for engaging and disengaging said handle and adapted to be engaged with and disengaged from said handle by the shifting of said spindle, and a lock adapted to block the shifting of said spindle.

2. A door latch and lock assembly having in combination a spindle passing through the door and adapted to be turned and shifted, a handle mounted on said spindle, a latch bolt on one side of the door retractable by the turning of said handle, a stop adapted to be set for engaging and disengaging said handle and adapted to be engaged with and disengaged from said handle by the shifting of said spindle, and a lock adapted to block the shifting of said spindle in its extreme Mil position opposite the latch bolt side of the door separated by the door from said handle.

3; A door latch and lock assembly having in combination a spindle passing through the door and adapted to be turned and shifted, a handle mounted on said spindle, a latch bolt retractable by the turning of said handle, a stop adapted to be set manually for engaging and disengaging said handle and adapted to be engaged with and disengaged from said handle by the shifting of said spindle, and a key operated lock adapted to block the shifting of said spindle separated by the door from said latch bolt, stop, and handle.

4. A door latch and lock assembly having in combination a spindle passing through the door and adapted to be turned and shifted, a handle mounted on said spindle, a latch bolt retractable by the turning of said handle, a spring resiliently closing said latch bolt, a stop adapted to be set manually for engaging and disengaging said handle and adapted to be set engaged with and disengaged from said handle by the shifting of said spindle, a second spring resiliently shifting said spindle out of engagement with said stop and a key operated lock adapted to block the shifting of said spindle separated by the door from said latch bolt and said stop.

5. A door latch and lock assembly having in combination a spindle passing through the door and adapted to be turned and shifted, a handle rigidly associated to and adapted for turning and shifting said spindle, a latch bolt on one side of the door the motion of which is permanently and positively governed by the turning motion of the spindle, means for keeping said turning stopped, means for setting said turning free by shifting said spindle, and key operated means for locking said spindle against shifting in its extreme position opposite the latch bolt side of the door, separated by the door from said latch bolt and said stopping means.

6. A door latch and lock assembly having in combination a spindle passing through the door and adapted to be turned and shifted, a handle rigidly associated to and adapted for turning and shifting said spindle, alatch bolt on one side of the door the motion of which is permanently and positively governed by the turning motion of the spindle, means for resiliently closing said latch bolt, means for keeping said turning stopped,

means for setting said turning free by shifting said spindle, and key operated means for locking said spindle against shifting in its extreme position opposite the latch bolt side of the door, separatedby the door from said latch bolt and said stopping means.

7. A door latch and lock assembly having in combination a spindle passing through the door and adapted to be turned and shifted, a latch bolt on one side of the door adapted to be opened by turning said spindle, means for preventing said opening of the latch bolt governed by shifting said spindle, and key operated means, separated from said latch bolt by the door, for locking said spindle against shifting in its extreme position opposite the latch bolt side of the door.

8. A door latch and lock assembly having in combination a spindle passing through the door and adapted to be turned and shifted, a latch bolt on one side of the door adapted to be opened by turning said spindle, means for resiliently closing said latch bolt, means for preventing said opening of the latch bolt governed by shifting said spindle, and key operated means, separated from said latch bolt by the door, for locking said spindle against shifting in its extreme position opposite the latch bolt side of the door.

MAX M. MUNK.

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