US2015248A

US2015248A - Lock

Info

Publication number: US2015248A
Application number: US654973A
Authority: US
Inventors: Lewis E Williams
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-02-03
Filing date: 1933-02-03
Publication date: 1935-09-24
Anticipated expiration: 1952-09-24

Description

p 3 L E. WILLIAMS 2,015,248

, LOCK Filed Feb. 5, 1935 2 Sheets-Sheet 1 I '11, n4 AMM 15 p 1935- L. E. WILLIAMS 2,015,248

LOCK

Filed Feb. 5; 1953 2 Sheets-Sheet 2 Patented Sept. 24, 1935 UNHTE STATES TENT FFEQE 13 Claims.

This invention relates to looks, and while features of the invention may be employed in looks used for different purposes, the invention is especially useful when applied to a door lock.

" The general object of the invention is to simplify the construction of locks and to provide a lock having a single bolt which can operate as a latch and also as a lock bolt.

Unless a lock bolt is of hardened metal, it is sometimes possible for a burglar to apply a hacksaw, or similar instrument, to cut off the projecting end of the bolt to gain entrance. One of the objects of this invention is to provide the bolt with means which would make it practically impossible for the bolt to be sawed off as with a hacksaw.

In the preferred embodiment of the lock the bolt is provided on the inner side of the door with a handle which enables the boltto be moved at will to unlock the door, and one of the objects of the invention is to provide simple keycontrolled means on the outer side of the door for unlocking it.

One of the features of the invention consists in automatic means for latching the bolt in its withdrawn position when the bolt is moved by -its handle to unlock the door, and one of the objects of the invention is to provide simple means for releasing this automatic latching means to enable the bolt to move to its locked position when the door is swung to its closed position.

Further objects of the invention will appear hereinafter.

The invention consists in the novel parts and combinations of parts to be described hereinafter,- all of which contribute to produce an efii'cient lock.

A preferredembodiment of the invention is described in the following specification, while the broad scope of the invention is pointed out in the appended claims.

In the drawings:

Figure 1 is a side elevation of a portion of a door provided with my lock and illustrating a portion of the door jamb in vertical section.

Figure 2 is a plan of the complete lock and showing the adjacent portions of the'door and door jamb in cross-section.

Figure 3 is a longitudinal vertical section through the look upon an enlarged scale and showing the parts in the relation which they have when the bolt is in its extended or locking position.

Figure 4 is a View similar to Figure 3, but showing the bolt withdrawn.

Figure 5 isa vertical section'taken about on the line 55 of Figure 3, certain parts being broken away; this view particularly illustrates 5 the key-controlled means for unlocking the door.

Figure 6 is a view showing the same parts as those illustrated in the left portion of Figure 5, but representing the key in the act of being inserted for unlocking the door.

Figure 7 is a front elevation of the inner side of the lock in the vicinity of the key-hole, certain parts being broken away.

Figure 8 is a vertical section, taken about on the line 8-8 of Figure 4, the outer portions of the lock being broken away.

Figure 9 is a vertical section, taken about on the line 9-9 of Figure 5 and particularly illus trating the means for latching the bolt in its extended or looking position.

Referring more particularly to the parts, andespecially to Figures 1, 3 and 4, the lock includes a casing i made of metal and of box form so as to operate as a guide for a bolt 2, said bolt having a neck 3 at its forward end that slides in and out through an opening 4 in the forward wall 5 of the casing. Resilient means is provided for urging the bolt 2 towards its extended or looking position. This means preferably consists of a coiled spring 6 located in the back of the casing.

The inside and outside walls of the casing are in the form of escutcheons l and 8, the former of which is located on the outer side of the door 9 to which the lock is attached. These escutcheons are formed with slots iii to enable the bolt to be moved by hand. For this purpose, the bolt is provided with two handles, that is to say, an inside handle H and an outer handle [2.

The lock is provided with means for automatically latching the bolt in its withdrawn position. Any suitable means may be employed for this pur pose but, in the present instance, I provide a rocker in the form of a dog I3 which is pivotally mounted in a chamber l4 in the upper side of the bolt. This rocker is provided with a rigid sleeve [5 and is mounted to rock on a transverse pin it, which pin extends transversely to the bolt so that the rocker I3 swings in the longitudinal plane of the bolt. The upper end of the rocker is formed with a deep notch l3a and when the bolt is moved back the dog is engaged by a fixed transverse pin I! that is mounted in a slot I3 in the upper wall 19 of the casing. This causes a rotation of the dog i3 in a clockwise direction, and this will bring 55 a tooth 20 on the side of the-sleeve into position above a shoulder 2| formed on the side of a spring 22 that is secured in the bolt and projects up into the chamber I4. In Figure 4 the bolt is indicated latched in its withdrawn position.

A tripping mechanism is provided for effecting the tripping of this detent spring 22 if the door is swung to its closed position. For this purpose, I prefer to provide a tripping pin 23, which is mounted to slide longitudinally and rotate freely in a guide bore 24 in the latch bolt. The forward end of this releasing pin 23 has a rounded projecting nose 25, and when the door is swung to its closed position this nose will engage a curved cam plate 26 that will push the pin inwardly and release the tooth 20 from the shoulder 2|. The spring 6 will then immediately advance the bolt to its locking position, shoving it into the keeper 21, which is in the form of a plate carrying the cam 26. If desired, the door jamb 28 may be provided with means for cushioning the advancing bolt to reduce the noise. For this purpose, the door jamb may be provided with a chamber 29 to house a coil spring 30 which presses against a cushion plate 3|. This cushion plate normally seats against the inner side of the keeper 21 and has an opening 32 sufficiently large to receive the nose of the release pin. The keeper 21 is provided with an opening 33, through which the bolt projects (see Figure 1). g

The lock is provided with means for latching the bolt in its locking position, and this means is key-controlled. For this purpose, the handle II is provided with a spindle 34 (see Figures 3 and 5), and this spindle has a notch 35 cut into it, the bottom of which forms a cam 36 (see Figure 9) When the handle I I is rotated in the proper direction the high face 31 of this cam will en- .gage the upper end of a dog 38 (see Figure 9) and force it down into a recess 38 in the bottom Wall of the casing so that thelower end of this dog will be back of a shoulder 48. This dog 38, which is in the form of a small block, is normally held in elevated position by a leaf-spring 4|. The handle I enables this locking block or dog 38 to be actuated from the inner side of the door. In order to enable the dog 38 to be released by keycontrolled means on the outer side of the door, the spindle 34 is provided at its outer end with a reduced neck 42, the extreme end of which is provided with a flat slot 43, and the handle I2 on the outer side of the door is provided with a key lock casing in the form of a tubular spindle 44 that encases this neck 42 and is rigidly secured to the bolt 2 by means of a set screw 45 (see Fig. 5). Adjacent the end of the reduced neck 42 and extending outwardly to a point near the outer side of the handle I2 a longitudinal slot 46 is provided in the bore of the handle I2. In the outer end of this bore a small guide 41 is provided having a vertical slot 48 in it for guiding a key-plate 49. This key-plate has a tongue 49a at its forward end that can project into the flat slot 43 to enable a key 50 to rotate the neck 42, but when the key is being withdrawn the keyplate 49 slides outwardly as far as possible in the slot 48 (see Fig. 6). When the key is not in the lock a small leaf-spring 5! holds the key-plate 49 in an elevated position, so that its upper edge will project up into the slot 46 and prevent the guide 41 from being rotated. The key-plate has a series of serrations 52, which are distinctive, and is also provided beyond these serrations with a notch 53 to receive a correspondingly formed key When the key is inserted through a key slot 54 in the outer face of the handle I2, if its serrations and its nose at its forward end fit into the serrations 52 and the notch 53, it will pull the key-plate down out of the notch 46 and will force the key-plate rearwardly so that the tongue 49a will pass into the fiat slot 43. This enables the key to rotate the neck 42 and consequently the spindle 34, of which it forms a part. This will remove the high face 3'! of the cam from the dog or block 38 and permit the spring 4| to lift the dog above the shoulder 40. The bolt can then be withdrawn by shoving the handle I2 toward the left, as viewed in the figures.

The releasing pin 23 is provided with a small cross-pin 55 (see Fig. 3), which will prevent the pin from becoming dislodged from the bolt 2.

In order to prevent any possibility of a burglar sawing off the projecting extension or neck 3 of the bolt, the releasing pin is made of hardened steel or similar material and is freely rotatable in the bolt. Hence, if a burglar should attempt to saw through the neck 3, when the saw arrived at the releasing pin it would simply rotate the releasing pin on its own longitudinal axis and could not cut through it.

The mode of operation of the lock will now be briefiy stated. Assuming that the bolt 2 is in its locking position and the person wishing to operate the lock is on the inner side of the door. He seizes the handle II on the inner side of the door and moves it away from the jamb. This movement is permitted by the slots H3 in the escutcheons. This movement compresses the spring 6. As the bolt moves toward the left, as viewed in Figure 3, the fixed pin I! on the casing enters the notch I30. and rocks the dog I3 through a slight angle in a clockwise direction. This will rotate the sleeve I 5 and bring the tooth 2!! on the sleeve above shoulder 2|. Due to the resiliency of the spring 22 this shoulder 2| will snap under the tooth 20, and this will hold the bolt in its Withdrawn position, as indicated in Figure 4. The door can then be left ajar or in any open position. If the door is slammed shut, the nose 25 of the releasing pin 23 will strike the cam plate 26, and this will shove the releasing pin in and disengage the shoulder 2| from the tooth 2B. The spring 6 will then immediately advance the bolt to its locking position. As this occurs, the noise is reduced by the cushion plate 3| backed up by the relatively weak spring 30 that will be compressed by the stronger spring 6.

If the person on the inner side of the door wishes tolock it, all he has to do is to rotate the handle II in the proper direction to cause the cam 35 (see Fig. 9) to move the locking dog 38 down past the shoulder 40 against the action of spring 4|. In this condition, the door can be unlocked on the outside by means of a key 50. When the key is inserted, if its serrations and forward end fit the key-plate 49, it will pull the key plate 43 down out of the slot 46. This will permit rotation of the guide 47, which carries the key-plate 49. Furthermore, as the key is completely inserted, it will shove the key-plate 49 back so that its tongue 49a passes into the flat slot 43, whereupon the key can rotate the spindle 42 in a direction to release the locking dog 38 from the shoulder 40.

When the key is rotated into position to release the locking dog 38, the key-plate 49 will be out of alignment with the slot 46. Hence, in order to withdraw the key, it is necessary to pull it outwardly to disengage the tongue 49a from the flat slot 43 and then to rotate it through to bring the key-plate into line with the groove 48, whereupon the key can be pulled out from engagement with the key-plate. As this occurs, the key-plate 49 will swing upwardly into the notch 46.

The hardened releasing pin 23 will prevent the neck 3 of the bolt 2 from being sawed off because it is freely rotatable in its bore 24.

It is understood that the embodiment of the invention described. herein is only one of the many embodiments this invention may take, and I do not wish to be limited in the practice of the invention, nor in the claims, to the particular embodiment set forth.

What I claim is: v

1. In a lock, the combination of a casing, a bolt mounted to slide in the casing, a rotatable handle mounted for lateral movement at one side of the casing, for sliding the bolt, a spring for urging the bolt to its locking position, means actuated by the rotation of the handle for latching the bolt in its locking position, and key-controlled means on the opposite side of the casing from said handle for controlling said last-named means to permit movement of the bolt to its unlocked position. v

2. In a lock, the combination of a casing, a bolt mounted to slide in the casing, a rotatable handle mounted for lateral movement at one side of the casing, for sliding the bolt, a spring for urging the bolt to its locking position, means actuated by the rotation of the handle for latching the bolt in its locking position, key-controlled means on the opposite side of the casing from said handle for controlling said last-named means to permit movement of the bolt, and a second handle mounted for lateral movement on the same side of the look as the key-controlled means for moving the bolt to its unlocked position.

3. In a lock, the combination of a casing, a bolt mounted to slide in the casing, a rotatable handle mounted for lateral movement at one side of the casing, for sliding the bolt, a spring for urging the bolt to its locking position, means actuated by the rotation of the handle for positively holding the bolt in its locking position, a second handle attached to the bolt on the opposite side of the casing from the first-named han-.

dle, and key-controlledv means mounted in the second-named handle for controlling said lastnamed means to permit movement of the bolt to its unlocked position.

4. In a lock, the combination of a casing, a bolt mounted to slide in the casing, a rotatable handle mounted for lateral movement at one,

s de of the casing, for sliding the bolt, a spring for urging the bolt to its locking position, means actuated by the rotation of the handle for latching the bolt in its locking position, a second handle rigidly attached to the bolt on the opposite side of the casing from the first-named handle, for sliding the bolt, and key-controlled means mounted in the second-named handle and coaxial therewith, for unlatching the bolt to permit its movement by the second handle to its unlocked position.

5. In a lock, the combination of a casing, a bolt mounted to slide in the casing, a handle at one side of the casing for moving the bolt, a spring for urging the bolt to its locking position, a latch mounted on the bolt, actuated by the rotation of the handle for engaging the casing to hold the bolt in its locking position, a second handle connected with the bolt on the opposite side of the casing from the first-named handle, said second handle having a tubular shank, and key-controlled means mounted in the said tubular shank for actuating the latch to release the bolt and permit its movement to its unlocked position.

6. In a door lock to cooperate with a keeper mounted in a door-jamb, the combination of a casing, a bolt mounted to slide in the casing and capable of moving into the keeper to lock the 10* door closed, a handle on the inner side of the door attached to the bolt for moving the same,

a spring urging the bolt to its locking position,

means mounted on the bolt actuated by the rotation of the handle for positively latching the 1& bolt in its locking position, and key-controlled means on the outer side of the door for con-trolling said last named means to release the bolt and permit its movement to its unlocked position.

7. In a door lock to cooperate with a keeper 20 mounted in a door-jamb, the combination of a casing, a bolt mounted to slide in the casing and capable of moving into the keeper to lock the door closed, a spring urging the bolt toward its locking position, a dog pivotally mounted on 25 the bolt for rotation on a transverse axis with respect to the bolt, fixed means on the casing for engaging the dog when the bolt is moved to its unlocked position, and thereby causing the rotation of the dog on its axis, and means as- 30 sociated with the dog for holding it against r0- ta-tion thereafter to hold the bolt in its unlocked position.

8. In a door lock to cooperate with a keeper mounted in'a door-jamb, the combination of a 85 casing, a bolt mounted to slide in the casing and capable of moving into the keeper to lock the door closed, a spring urging the bolt toward its locking position, a dog pivotally mounted on the bolt for rotation on a transverse axis with 40 respect to the bolt, fixed means on the casing for engaging the dog when the bolt is moved to its unlocked position, thereby causing the rotation of the dog on its axis, means associated with the dog for holding it against rotation there- 45 door closed, a spring urging the bolt to its lock- 55 ing position, automatic means for latching the bolt in its unlocked position, a trip device including a pin of hard metal mounted to slide longitudinally in the bolt and having a projecting nose capable of projecting from the bolt for an engaging the keeper, and means actuated by the said pin for releasing the automatic latching means.

10. In a lock, the combination of a casing, a

bolt guided in the casing, a rotatable spindle 65 mounted in the casing, a key lock casing carried by the bolt and located at one side of said firstnamed casing, said rotatable spindle having a recess in its end located within the key, lock casing, a key plate mounted in the key lock cas- 70 ing and guided for longitudinal movement toward or from the said recess, said key lock casing having a key slot in line with the key plate to receive a key, and said key plate having distinctive serrations to cooperate with the key and enabling the key when in engagement with the key plate to push the key plate into engagement with the said recess for rotating the spindle, and means for latching the bolt in its locking position, controlled by the rotation of said spindle.

11. In a lock, the combination of a casing, a bolt guided in the casing, a rotatable spindle mounted in the casing, a key lock casing carried by the bolt and located at one side of the firstnamed casing, said rotatable spindle having a recess in its end located within the key lock casing, a key plate mounted in the key lock casing and guided for longitudinal movement toward or from the said recess, said key lock casing having a key slot in line with the key plate to receive a key, and said key plate having distinctive serrations to cooperate with the key and enabling the key when in engagement with the key plate to push the key plate into engagement with the said recess for rotating the spindle, a spring associated with the bolt urging the same toward its locking position, and means for latching the bolt in its locking position, controlled by the rotation of said spindle.

12. In a lock, the combination of a case having sidewalls, each sidewall having a slot therein, a handle corresponding to each slot and mounted therein, a bolt carrying the handles and guided to slide in the casing, one of said handles mounted for rotation and latching means for latching the bolt in its locking position con- 10 trolled by the rotation of the rotatable handles.

13. In a. lock, the combination of a case having sidewalls, each sidewall having a slot therein, a handle corresponding to each slot and mounted therein, a bolt carrying the handles and 15 guided to slide in the casing, latching means for latching the bolt in its locking position controlled by one of said handles, and key-controlled means associated with the other handle for controlling the latching means. 20 3 LEWIS E. WILLIAMS.