US 2254702 A
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Description (OCR text may contain errors)
Sept. 2, 1941. s. s. KARAVIA LOCK Filed Mary 8, 1940' SoPH/E SKA RA WAv ATTO RN EY gdm Wmv Patented Sept. 2, 1941 STTES PATENT OFFICE LQGK Sophie S.. Karavia, New York, N. Y. Application May 8, 1940, Serial No. 333,901 3 Claims. :(Cl. Y0-146) My invention relates to locks and has par-,- ticular reference to locks of a self-closing type, such as are used for doors, safes, etc.
In ordinary door locks a bolt is usually employed having a tapered end so that it can be pushed out of the way in closing a door, a spring being provided to push the bolt back into a locking position when the bolt registers with a corresponding hole in a door frame. In order to make the lock safe against being picked or opened by a thin tool inserted into a crack between the door and the frame, a second bolt usually is provided, which is moved in its place by a key-operated locking mechanism. 'I'he necessity of using a key for locking the door deprives the lock of an advantage of being fully automatic.
In order to overcome this disadvantage,A I have provided aslock which is entirely automatic in its locking action, so that both bolts are moved into the locking position by closing the door. For unlocking the door, both bolts are simultane-` ously moved either by a key from the outside or by a handle from the inside. In order to make my lock safe against being picked, I provide two bolts which are moved in the opposite directions, the tapered bolt moving the door portion of my lock while the second bolt moves in a frame or stationary portion of the lock.
My invention is more fully described in the accompanying specification and drawing in which:
Fig. 1 is a `sectional view of a. frame portion of my lock;
Fig. 2 is a sectional view of a door portion of my lock;
Fig. 3 is a front view of the frame portion;`
Fig. 4 is a sectional view taken onrthe line 4 4 of/Fig. 1;
Fig. 5 is a sectional side view of both lock portions in the locking position;
Fig. 6 -is a sectional view of the door portion in an unlocked position;
Fig. '7 is a sectional side view of the door portion;
Fig. 8 is a detail view of an operating arm;
Fig. 9 is a top view of the door portion.
My lock is shown in the accompanying drawe ing in one of its forms adapted for use in conf nection with doors., It comprises two portions,
one portion being fitted into a corresponding re-o. cess in a door, the other` portion being tted in a recess in a door frame. The first portion will'be. therefore,y for convenience, called door pore tion, the other being frame portion. ItA is.
understood, of course, that the same portions may be used in connection with other structural parts or elements which it is desired to provide with locks. I
The door portion consists of a casing I having a front plate 2. 'I he casing is divided into. compartments 3 and 4 by a wall 5, the plate 2 having corresponding openings E and 1. The lower compartment has a bolt 8 having a beveled end 9 so placed that the bolt is pushed back when the door is being closed. A plunger Il) slid-1 ably tted in the second compartment or pocket 3 and has av rod I I passing through a hole in a wall I2l with a knob I3 at the end. A spring I4 tendsv to. keep the plunger in the withdrawn or inward position. A lever I5 is pivoted at I6 on the wall 5, one end of the lever engaging the rod II between pins Il, the other end having a slot engaging a pin I8 on a reduced portion I Il of the bolt 8. The lever I5. is so positioned that the bolt 8 is fully withdrawn when the plunger Ii)` is moved into an operative position with vits front end ilush with the surface'of the front plate 2. The plunger can be, moved by curved forked armsA 2,0, 2.engaging the knob I3, the arms being mounted on shafts 2i, 2l', passing through the walls of the casing I. A
The shaft ZI has at the end a slot 22', Fig. 7, for a lock mechanism 23 operated by a key 24, the shaft 2| having a slot 22 for a handle 26. Each shaft therefore can independently move the plunger through its arm.
Opposite the casing I a second casing 21 is tted in a door frame, its front plate 28 being provided with holes 29 for screws. The c'asiiligl is divided by a wall Sli into two compartments or pockets 3|, 3l', the plate 28 having corresponding openings 32 and 3.3. A bolt 34 is slidably tted in the upper compartment 3l opposite the opening' 6- in the plate 2. The bolt has a longiattached to the rear wall of the casing 21. spring 3'!V urges the bolt outward.` The bolt i an angle to. the wall 3l) as shown in Fig. 1, so that it can be engaged by the beveled end 9 of the rst bolt 2 8. The lever, when engaged by the tapering end 9, turns outward against the pressure of the spring 43, withdrawing the pin 38 from the hole 38' and thereby releasing the second bolt. The latter moves under action of the spring 31, entering the opening 6 in the plate 2 of the rst casing. A pin 45 at the side of the bolt 34 engages the inner side of the plate 28, thereby limiting the outward movement of the bolt.
It follows, therefore, that the door, when fully closed, is automatically locked by the first bolt 8 entering the opening 32 in the front plate of the second casing and, at the same time, the bolt 8 releases the second bolt 34 which also automatically locks the door by entering the opening 6 in the front plate of the rst casing. I
For opening the door, the shaft 2I is turned, either by a key 2li from the outside or by the handle 26 from the inside. The arm 26, pressing on the knob I3, moves the plunger I6 outward, thereby forcing the second bolt 36 back into its compartment 33. An inclined slot 46 is provided in the second bolt 313, the cam-shaped bottom side of the slot raising the pin 38 until it reaches the hole 38' and drops intoV it, locking the second bolt in the withdrawn or inoperative position. The outward movement of the plunger ID at the same timecauses withdrawal oi. the lirst bolt B from the second casing through the lever I5. Both bolts, being now withdrawn, as shown in Fig. 6, the door is unlocked and can be opened.
For locking the first plunger in a withdrawn or inoperative position, it is provided with a hole 41 at the end which can lbe engaged by a latch 8 slidably fitted in the plate 2. The latch can be manually moved upward when the plunger is in its outward or operative position, as shown in Fig. 6, thereby locking the plunger in this position.
My lock is also provided with an additional safety featureV for preventing it being opened from the'inside if the door was locked from the outside. Thus, a burglar may be prevented from opening the door from the inside if he had gained entrance through a window, for instance. The lock, for this purpose, is provided with a locking bar B slidably mounted in a slot in the wall I2 and having a pointed end adapted to engage a notch 5I in the shaft 2l. The bar 56 is connected by a screw 52 with a rod 53 slidably supported on top of the Ycasing I and enclosed by an addedcasing extension 54. The end 55 of the rod 53 passes through a hole in the front plate Zand can be pushed `by a suitable instrument, or, if the rod is made of a larger diameter, by a linger, thereby moving the bar 50. for locking the shaft 2| against rotation by the handle 26. 'A second rod 56 is placed alongside the rod 53 and has an end 51 extending through the plate 2, the two rods being pivotally connected together by a lever 58 at 59, 66, the latter being pivoted at 5I to a bracket 62 mounted on the upper wall of the casing I. The ends of the rods 53 and 56 slide in' corresponding holesin the bracket 62. By pushing inward the end 51 of the second rod, the lirst rod 53 is retrieved, thereby returning the bar 59 into its inoperative position. It is possible, therefore, by operating one or the other rod, to lock or to unlock the shaft 27|.
The locking mechanism 23 is preferably` attached to the casing I by two sc rews (not shown) passing rom the inside through ak portion of the door atthe handle, through the holes 12 in the walls of the casing I, through Yanother portion o the door at the locking mechanism 23, and finally into tapped holes in the locking mechanism or cylinder 23.
In certain cases it is desirable to provide means to prevent the operation of the locking mechanism, as, for instance, if there is a danger that someone may open the door at night with a duplicate key. I provide for this purpose a locking lever 63 pivoted at 64 on the wall 5 and having a curved pointed end 65. The lever is normally held with its point beyond the end of the arm 20'. If the lever 63 is turned, however, its point 65 will be placed in front of the arm 26', preventing the latter from moving when attempt is made to turn the shaft 2I by the key 24.
For turning the lever 63 it is provided with an extension rod 66, whose outer end passes through a hole in the casing I and is engaged by a sliding rod 61. The latter has a cylindrical end of a reduced diameter at the front, sliding in a corresponding hole in the front plate 2. The other end of the rod 61 is also of a reduced diameter and slides in a bracket 68. The front end of the rod 66 can be depressed by a suitable instrument, or, if it is made of a suiiiciently large size, by a ringer, for moving the rod 61 and turning the lever 63 into a position lor locking the arm 20 against being turned by the key 24. For unlocking the lever 63 a second rod 6B is mounted alongside the rod 51 with its end extending through the front plate 2. The two rods are connected by a lever 10 similar in all respects to the lever 58 and pivotally supported at 1I on the bracket 68. By pushing the second rod 69 inward,` the iirst is moved outward by the lever 16, thereby returning the lever 63 into an inoperative position. The casing I has an extension 12' over` the rods 63 and 61.
It is understood that my lock may be further modified without departing from the spirit of my inventiort, within the scope of the appended claims.
` I claim as my invention:
1. A lock'for locking together two relatively movable members comprising a first casing adapted tov be tted in the first member, a, secondr casing adapted to be fitted in the second member, the outer portion of the first casing being adapted to register with the outer portion of the second casing when the two members are brought togeter, a bolt slidably tted in the rst casing and having a beveled end portion, a yieldable resilient means for moving the beveled bolt outward, the bolt being adapted to be moved inward by the pressure of the second casing when the two members are moved together, the second casing having a pocket for receiving the beveled end of the first bolt, the latter being thereby adapted to lock the two casings together when the pocket registers with the first bolt, a second bolt slidably tted in the second casing, a yieldable resilient means for moving.
the second bolt outward, the rst casing having a pocket -for the second bolt, means to retain` the` second bolt inside thel second casing against the action of its resilient means, means to release the second bolt by the end of the rst bolt entering its pocket in the second casing, thereby permitting the second bolt to enter its pocketin the rst casing for locking together the casings by both bolts, means to manually retract both bolts, thereby releasing the two members with the i casings forv relative movement apart, a plunger movably supported in the first casing adapted to abut the end of the second bolt when the latt-er is moved into its pocket in the first casing, and a manually movable member at the rst casing for retaining the plunger in the outward position with the rst bolt withdrawn into inoperative position.
2. A lock for locking together two relatively movable members comprising a first casing adapted to be fitted in the rst member, a second casing adapted to be fitted in the second member, the outer portion of the rst casing being adapted to register with the outer portion of the second casing when the two members are brought together, Ia -bolt slidably tted in the first casing and having a beveled end portion, a yieldable resilient means for moving the beveled bolt outward, the bolt being adapted to be moved inward by the pressure of the second casing when the two members are moved together, the second casing having a pocket for receiving the beveled end of the rst bolt, the latter being thereby adapted to lock the two casings together, when the pocket registers with the first bolt, a second bolt slidably tted in the second casing, a yieldable resilient means for moving the second `bolt outward, the rst casing having a pocket'for the second bolt, a plunger movably supported in the rst casing adapted to abut the end of the second bolt when the latter is moved into its pocket in the rst casing, a shaft passing through the side walls of the first casing and formed of two portions mounted for rotation independently of each other, arms extending from the shaft portions independently operatively connected with the plunger, means to manually rotate on-e portion of the shaft from one side of the casing, means to manually rotate the other portion of the shaft from the other side of the casing for moving the plunger outward, thereby ejecting the second bolt from the first casing and disengaging the casings and a manually operable locking mechanism for one of said shaft portions.
3. A lock for locking together two relatively movable members, comprising a casing adapted to be fitted into one of the members, a bolt slidably fitted in the casing adapted to engage the other member, a plunger slidably supported in the casing, a lever rotatively supported at the middle in the casing, one end of the lever engaging the bolt, the other end of the lever engaging the plunger, two shafts rotatively and co-axially supported in the opposite sides of the casing extending to the outside of the member and adapted to be manually rotated, lever arms at the inner ends of the shafts engaging the inner end of the plunger and adapted to move the plunger, thereby moving the bolt, and means to render one of the levers inoperative. y
SOPHIE S. KARAVIA.